Merge pull request #6194 from urbit/next/416

next: zuse 416 (terminal edition)

.github/actions/glob/entrypoint.sh

@@ -1,32 +0,0 @@
-#!/usr/bin/env bash
-
-cd "$GITHUB_WORKSPACE" || exit
-
-echo "$2" | base64 -d > service-account
-echo "$3" | base64 -d > id_ssh
-echo "$4" | base64 -d > id_ssh.pub
-
-chmod 600 service-account
-chmod 600 id_ssh
-chmod 600 id_ssh.pub
-
-janeway release glob-all --dev --no-pill \
-    --credentials service-account \
-    --ssh-key id_ssh \
-    --ci \
-  | bash
-
-SHORTHASH=$(git rev-parse --short HEAD)
-
-janeway release prepare-ota arvo-glob-"$SHORTHASH" "$1" \
-    --credentials service-account \
-    --ssh-key id_ssh \
-    --ci \
-  | bash
-
-janeway release perform-ota "$1" \
-    --credentials service-account \
-    --ssh-key id_ssh \
-    --ci \
-  | bash
-

.github/actions/ota/Dockerfile

@@ -1,4 +1,4 @@
-FROM tloncorp/janeway:v0.15.4
+FROM tloncorp/janeway:v0.17.0
 COPY entrypoint.sh /entrypoint.sh
 EXPOSE 22/tcp
 ENTRYPOINT ["/entrypoint.sh"]

.github/actions/ota/action.yml

@@ -1,18 +1,21 @@
-name: 'glob'
-description: 'Create a glob and deploy it to a moon'
+name: 'ota'
+description: 'perform an OTA update of arvo on a remote ship'
 inputs:
   ship:
-    description: "Ship to deploy to"
+    description: "target ship"
     required: true
   credentials:
     description: "base64-encoded GCP Service Account credentials"
     required: true
   ssh-sec-key:
-    description: "A base64-encoded SSH secret key for the container to use"
+    description: "base64-encoded SSH secret key for the container to use"
     required: true
   ssh-pub-key:
-    description: "The corresponding base64-encoded SSH public key"
+    description: "base64-encoded corresponding SSH public key"
     required: true
+  ref:
+    description: "git ref of arvo source to check out"
+    required: false
 
 runs:
   using: 'docker'
@@ -22,4 +25,4 @@ runs:
     - ${{ inputs.credentials }}
     - ${{ inputs.ssh-sec-key }}
     - ${{ inputs.ssh-pub-key }}
-
+    - ${{ inputs.ref }}

.github/actions/ota/entrypoint.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+echo "$2" | base64 -d > /service-account
+echo "$3" | base64 -d > /id_ssh
+echo "$4" | base64 -d > /id_ssh.pub
+
+chmod 600 /service-account
+chmod 600 /id_ssh
+chmod 600 /id_ssh.pub
+
+janeway \
+    --ci \
+    --verbose \
+    --credentials /service-account \
+    --ssh-key /id_ssh \
+    release ota \
+    arvo \
+    "$1" \
+    ${5:+"--ref"} ${5:+"$5"} \
+  | bash

.github/workflows/chromatic.yml

@@ -1,27 +0,0 @@
-name: Chromatic Deployment
-
-on:
-  pull_request:
-    paths:
-      - 'pkg/interface/**'
-  push:
-    paths:
-      - 'pkg/interface/**'
-    branches:
-      - 'release/next-userspace'
-
-jobs:
-  chromatic-deployment:
-    runs-on: ubuntu-latest
-    name: "Deploy Chromatic"
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-      - run: npm i && npm run bootstrap
-      - name: Publish to Chromatic
-        uses: chromaui/action@v1
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
-          workingDir: pkg/interface

.github/workflows/glob.yml

@@ -1,20 +0,0 @@
-name: glob
-on:
-  push:
-    branches:
-      - 'release/next-userspace'
-jobs:
-  glob:
-    runs-on: ubuntu-latest
-    name: "Create and deploy a glob to ~hanruc-nalfus-nidsut-tomdun"
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          lfs: true
-      - uses: ./.github/actions/glob
-        with:
-          ship: 'hanruc-nalfus-nidsut-tomdun'
-          credentials: ${{ secrets.JANEWAY_SERVICE_KEY }}
-          ssh-sec-key: ${{ secrets.JANEWAY_SSH_SEC_KEY }}
-          ssh-pub-key: ${{ secrets.JANEWAY_SSH_PUB_KEY }}
-

.github/workflows/merge-master.yml

@@ -1,27 +0,0 @@
-name: merge
-on:
-  push:
-    branches:
-      - 'master'
-jobs:
-  merge-to-next-js:
-    runs-on: ubuntu-latest
-    name: "Merge master to release/next-userspace"
-    steps:
-      - uses: actions/checkout@v2
-      - uses: devmasx/merge-branch@v1.3.1
-        with:
-          type: now
-          target_branch: release/next-userspace
-          github_token: ${{ secrets.JANEWAY_BOT_TOKEN }}
-
-  merge-to-group-timer:
-    runs-on: ubuntu-latest
-    name: "Merge master to ops/group-timer"
-    steps:
-      - uses: actions/checkout@v2
-      - uses: devmasx/merge-branch@v1.3.1
-        with:
-          type: now
-          target_branch: ops/group-timer
-          github_token: ${{ secrets.JANEWAY_BOT_TOKEN }}

.github/workflows/merge-release.yml

@@ -1,17 +0,0 @@
-name: ops-merge
-on:
-  push:
-    branches:
-      - 'release/*'
-jobs:
-  merge-release-to-ops:
-    runs-on: ubuntu-latest
-    name: "Merge to ops-tlon"
-    steps:
-      - uses: actions/checkout@v2
-      - uses: devmasx/merge-branch@v1.3.1
-        with:
-          type: now
-          target_branch: ops-tlon
-          github_token: ${{ secrets.JANEWAY_BOT_TOKEN }}
-

.github/workflows/ota.yml

@@ -0,0 +1,19 @@
+name: ota
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - 'next/arvo'
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    name: "make an OTA update to arvo on ~binnec-dozzod-marzod"
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/ota
+        with:
+          ship: 'canary'
+          credentials: ${{ secrets.JANEWAY_SERVICE_KEY }}
+          ssh-sec-key: ${{ secrets.JANEWAY_SSH_SEC_KEY }}
+          ssh-pub-key: ${{ secrets.JANEWAY_SSH_PUB_KEY }}
+          ref: 'next/arvo'

bin/brass.pill

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:c4247c64a7d9fc0c0f1d2f017c21dd3464ddfe56529c7d6eef0e64554bd453e8
-size 7611162
+oid sha256:bd487cdb8294fdef6878f623bceb893553b36b2a616d22d30017b430361586fb
+size 3889185

bin/ivory.pill

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:5123a1ac30b83ec026587574df1ce13a73e72d06588ff68b5c41c09e1bebb5b7
-size 949962
+oid sha256:26ff86808886beb831e4a135f478e42ce83ef4a09ad24808b3fe97248ce7a6b7
+size 1136643

bin/solid.pill

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:40bc203b8a2d2ebad81723da6fc946ee32d2f8a204884f50f9710177ae257d08
-size 5712264
+oid sha256:f4d585474b6df173dc1c172f343192ac88bd3ced1a9c7cf6877402722ac139de
+size 5748201

doc/spec/nock/10.txt

@@ -0,0 +1,70 @@
+Author: Mencius Moldbug [moldbug@gmail.com]
+Date: 9/15/2008
+Version: 10K
+
+1. Introduction
+
+    This file defines one function, "nock." 
+    
+    nock is in the public domain.
+ 
+2. Data
+
+    A "noun" is either an "atom" or a "cell."  An "atom" is an unsigned 
+    integer of any size.  A "cell" is an ordered pair of any two nouns,
+    the "head" and "tail."
+
+3. Semantics
+
+    nock maps one noun to another.  It doesn't always terminate.
+
+4. Pseudocode
+
+    nock is defined in a pattern-matching pseudocode, below.
+
+    Brackets enclose cells.  [a b c] is [a [b c]].
+
+5. Definition
+
+5.1 Transformations
+
+      *[a [b c] d] => [*[a b c] *[a d]]
+      *[a 0 b]     => /[b a]
+      *[a 1 b]     => [b]
+      *[a 2 b c d] => *[a 3 [0 1] 3 [1 c d] [1 0] 3 [1 2 3] [1 0] 5 5 b]
+      *[a 3 b]     => **[a b]
+      *[a 4 b]     => &*[a b]
+      *[a 5 b]     => ^*[a b]
+      *[a 6 b]     => =*[a b]
+      *[a]         => *[a]
+
+5.2 Operators
+
+5.2.1 Goto [*]
+
+      *[a]             -> nock[a]
+
+5.2.2 Deep [&]
+    
+      &[a b]           -> 0
+      &[a]             -> 1
+ 
+5.2.4 Bump [^]
+
+      ^[a b]           -> ^[a b]
+      ^[a]             -> (a + 1)
+
+5.2.5 Like [=]
+
+      =[a a]           -> 0
+      =[a b]           -> 1
+      =[a]             -> =[a]
+
+5.2.6 Snip [/]
+
+      /[1 a]           -> a
+      /[2 a b]         -> a
+      /[3 a b]         -> b
+      /[(a + a) b]     -> /[2 /[a b]]
+      /[(a + a + 1) b] -> /[3 /[a b]]
+      /[a]             -> /[a]

doc/spec/nock/11.txt

@@ -0,0 +1,74 @@
+Author: Mencius Moldbug (moldbug@gmail.com)
+Date: 5/25/2008
+Version: 11K
+
+1. Introduction
+
+    This file defines one function, "nock." 
+    
+    nock is in the public domain.
+ 
+2. Data
+
+    A "noun" is either an "atom" or a "cell."  An "atom" is an unsigned 
+    integer of any size.  A "cell" is an ordered pair of any two nouns,
+    the "head" and "tail."
+
+3. Semantics
+
+    nock maps one noun to another.  It doesn't always terminate.
+
+4. Pseudocode
+
+    nock is defined in a pattern-matching pseudocode, below.
+
+    Parentheses enclose cells.  (a b c) is (a (b c)).
+
+5. Definition
+
+5.1 Transformations
+
+      *(a (b c) d) => (*(a b c) *(a d))
+      *(a 0 b)     => /(b a)
+      *(a 1 b)     => (b)
+      *(a 2 b c d) => *(a 3 (0 1) 3 (1 c d) (1 0) 3 (1 2 3) (1 0) 5 5 b)
+      *(a 3 b)     => **(a b)
+      *(a 4 b)     => &*(a b)
+      *(a 5 b)     => ^*(a b)
+      *(a 6 b)     => =*(a b)
+
+      *(a 7 b c)   => *(a 3 (((1 0) b) c) 1 0 3)
+      *(a 8 b c)   => *(a c)
+
+      *(a)         => *(a)
+
+5.2 Operators
+
+5.2.1 Goto (*)
+
+      *(a)             -> nock(a)
+
+5.2.2 Deep (&)
+    
+      &(a b)           -> 0
+      &(a)             -> 1
+ 
+5.2.4 Bump (^)
+
+      ^(a b)           -> ^(a b)
+      ^(a)             -> a + 1
+
+5.2.5 Same (=)
+
+      =(a a)           -> 0
+      =(a b)           -> 1
+      =(a)             -> =(a)
+
+5.2.6 Snip (/)
+
+      /(1 a)           -> a
+      /(2 a b)         -> a
+      /(3 a b)         -> b
+      /((a + a) b)     -> /(2 /(a b))
+      /((a + a + 1) b) -> /(3 /(a b))
+      /(a)             -> /(a)

doc/spec/nock/12.txt

@@ -0,0 +1,75 @@
+Author: Curtis Yarvin (curtis.yarvin@gmail.com)
+Date: 3/28/2008
+Version: 0.12
+
+1. Introduction
+
+    This file defines one function, "nock." 
+    
+    nock is in the public domain.
+ 
+2. Data
+
+    A "noun" is either an "atom" or a "cell."  An "atom" is an unsigned 
+    integer of any size.  A "cell" is an ordered pair of any two nouns,
+    the "head" and "tail."
+
+3. Semantics
+
+    nock maps one noun to another.  It doesn't always terminate.
+
+4. Pseudocode
+
+    nock is defined in a pattern-matching pseudocode, below.
+
+    Parentheses enclose cells.  (a b c) is (a (b c)).
+
+5. Definition
+
+5.1 Transformations
+
+      *(a (b c) d) => (*(a b c) *(a d))
+      *(a 0 b)     => /(b a)
+      *(a 1 b)     => (b)
+      *(a 2 b c)   => *(*(a b) c)
+      *(a 3 b)     => **(a b)
+      *(a 4 b)     => &*(a b)
+      *(a 5 b)     => ^*(a b)
+      *(a 6 b)     => =*(a b)
+
+      *(a 7 b c d) => *(a 3 (0 1) 3 (1 c d) (1 0) 3 (1 2 3) (1 0) 5 5 b)
+      *(a 8 b c)   => *(a 2 (((1 0) b) c) 0 3)
+      *(a 9 b c)   => *(a c)
+
+      *(a)         => *(a)
+
+5.2 Operators
+
+5.2.1 Goto (*)
+
+      *(a)             -> nock(a)
+
+5.2.2 Deep (&)
+    
+      &(a b)           -> 0
+      &(a)             -> 1
+ 
+5.2.4 Bump (^)
+
+      ^(a b)           -> ^(a b)
+      ^(a)             -> a + 1
+
+5.2.5 Same (=)
+
+      =(a a)           -> 0
+      =(a b)           -> 1
+      =(a)             -> =(a)
+
+5.2.6 Snip (/)
+
+      /(1 a)           -> a
+      /(2 a b)         -> a
+      /(3 a b)         -> b
+      /((a + a) b)     -> /(2 /(a b))
+      /((a + a + 1) b) -> /(3 /(a b))
+      /(a)             -> /(a)

doc/spec/nock/13.txt

@@ -0,0 +1,71 @@
+Author: Curtis Yarvin (curtis.yarvin@gmail.com)
+Date: 3/8/2008
+Version: 0.13
+
+1. Manifest
+
+    This file defines one Turing-complete function, "nock."
+
+    nock is in the public domain.  So far as I know, it is
+    neither patentable nor patented.  Use it at your own risk.
+ 
+2. Data
+
+    Both the domain and range of nock are "nouns."
+
+    A "noun" is either an "atom" or a "cell."  An "atom" is an unsigned 
+    integer of any size.  A "cell" is an ordered pair of any two nouns,
+    the "head" and "tail."
+
+3. Pseudocode
+
+    nock is defined in a pattern-matching pseudocode.
+
+    Match precedence is top-down.  Operators are prefix.  Parens
+    denote cells, and group right: (a b c) is (a (b c)).  
+
+4. Definition
+
+4.1 Transformations
+
+      *(a 0 b c)   => *(*(a b) c)
+      *(a 0 b)     => /(b a)
+      *(a 1 b)     => (b)
+      *(a 2 b)     => **(a b)
+      *(a 3 b)     => &*(a b)
+      *(a 4 b)     => ^*(a b)
+      *(a 5 b)     => =*(a b)
+      *(a 6 b c d) => *(a 2 (0 1) 2 (1 c d) (1 0) 2 (1 2 3) (1 0) 4 4 b)
+      *(a b c)     => (*(a b) *(a c))
+      *(a)         => *(a)
+
+4.2 Operators
+
+4.2.1 Goto (*)
+
+      *(a)             -> nock(a)
+
+4.2.2 Deep (&)
+    
+      &(a b)           -> 0
+      &(a)             -> 1
+ 
+4.2.3 Bump (^)
+
+      ^(a b)           -> ^(a b)
+      ^(a)             -> a + 1
+
+4.2.4 Same (=)
+
+      =(a a)           -> 0
+      =(a b)           -> 1
+      =(a)             -> =(a)
+
+4.2.5 Snip (/)
+
+      /(1 a)           -> a
+      /(2 a b)         -> a
+      /(3 a b)         -> b
+      /((a + a) b)     -> /(2 /(a b))
+      /((a + a + 1) b) -> /(3 /(a b))
+      /(a)             -> /(a)

doc/spec/nock/6.txt

@@ -0,0 +1,42 @@
+1 Structures
+
+  A noun is an atom or a cell.  An atom is any natural number.  
+  A cell is an ordered pair of nouns.
+
+2 Reductions
+
+  nock(a)           *a
+  [a b c]           [a [b c]]
+
+  ?[a b]            0
+  ?a                1
+  +a                1 + a
+  =[a a]            0
+  =[a b]            1
+
+  /[1 a]            a
+  /[2 a b]          a
+  /[3 a b]          b
+  /[(a + a) b]      /[2 /[a b]]
+  /[(a + a + 1) b]  /[3 /[a b]]
+
+  *[a [b c] d]      [*[a b c] *[a d]]
+
+  *[a 0 b]          /[b a]
+  *[a 1 b]          b
+  *[a 2 b c]        *[*[a b] *[a c]]
+  *[a 3 b]          ?*[a b]
+  *[a 4 b]          +*[a b]
+  *[a 5 b]          =*[a b]
+
+  *[a 6 b c d]      *[a 2 [0 1] 2 [1 c d] [1 0] 2 [1 2 3] [1 0] 4 4 b]
+  *[a 7 b c]        *[a 2 b 1 c]
+  *[a 8 b c]        *[a 7 [[0 1] b] c]
+  *[a 9 b c]        *[a 7 c 0 b]
+  *[a 10 b c]       *[a c]
+  *[a 10 [b c] d]   *[a 8 c 7 [0 2] d]
+
+  +[a b]            +[a b]
+  =a                =a
+  /a                /a
+  *a                *a

doc/spec/nock/7.txt

@@ -0,0 +1,42 @@
+1 Structures
+
+  A noun is an atom or a cell.  An atom is any natural number.  
+  A cell is any ordered pair of nouns.
+
+2 Pseudocode
+
+  [a b c]           [a [b c]]
+  nock(a)           *a
+ 
+  ?[a b]            0
+  ?a                1
+  ^a                1 + a
+  =[a a]            0
+  =[a b]            1
+
+  /[1 a]            a
+  /[2 a b]          a
+  /[3 a b]          b
+  /[(a + a) b]      /[2 /[a b]]
+  /[(a + a + 1) b]  /[3 /[a b]]
+
+  *[a [b c] d]      [*[a b c] *[a d]]
+
+  *[a 0 b]          /[b a]
+  *[a 1 b]          b
+  *[a 2 b c]        *[*[a b] *[a c]]
+  *[a 3 b]          ?*[a b]
+  *[a 4 b]          ^*[a b]
+  *[a 5 b]          =*[a b]
+
+  *[a 6 b c d]      *[a 2 [0 1] 2 [1 c d] [1 0] 2 [1 2 3] [1 0] 4 4 b]
+  *[a 7 b c]        *[a 2 b 1 c]
+  *[a 8 b c]        *[a 7 [[7 [0 1] b] 0 1] c]
+  *[a 9 b c]        *[a 7 c 0 b]
+  *[a 10 b c]       *[a c]
+  *[a 10 [b c] d]   *[a 8 c 7 [0 3] d]
+
+  ^[a b]            ^[a b]
+  =a                =a
+  /a                /a
+  *a                *a

doc/spec/nock/8.txt

@@ -0,0 +1,45 @@
+1 Structures
+
+    A noun is an atom or a cell.  An atom is any unsigned integer.  
+    A cell is an ordered pair of nouns.
+
+2 Pseudocode
+
+    [a b c] is [a [b c]]; *a is nock(a).  Reductions match top-down.
+
+3 Reductions
+
+    ?[a b]            0
+    ?a                1
+    ^a                (a + 1)
+    =[a a]            0
+    =[a b]            1
+
+    /[1 a]            a
+    /[2 a b]          a
+    /[3 a b]          b
+    /[(a + a) b]      /[2 /[a b]]
+    /[(a + a + 1) b]  /[3 /[a b]]
+
+    *[a [b c] d]      [*[a b c] *[a d]]
+    *[a 0 b]          /[b a]
+    *[a 1 b]          b
+    *[a 2 b c]        *[*[a b] *[a c]]
+    *[a 3 b]          ?*[a b]
+    *[a 4 b]          ^*[a b]
+    *[a 5 b]          =*[a b]
+
+    *[a 6 b c d]      *[a 2 [0 1] 2 [1 c d] [1 0] 2 [1 2 3] [1 0] 4 4 b]
+    *[a 7 b c]        *[a 2 b 1 c]
+    *[a 8 b c]        *[a 7 [7 b [0 1]] c]
+    *[a 9 b c]        *[a 8 b 2 [[7 [0 3] d] [0 5]] 0 5]
+    *[a 10 b c]       *[a 8 b 8 [7 [0 3] c] 0 2]
+    *[a 11 b c]       *[a 8 b 7 [0 3] c]
+    *[a 12 b c]       *[a [1 0] 1 c]
+
+    ^[a b]            ^[a b]
+    =a                =a
+    /a                /a
+    *a                *a
+
+

doc/spec/nock/9.txt

@@ -0,0 +1,43 @@
+1 Context
+
+    This spec defines one function, Nock.
+ 
+2 Structures
+
+    A noun is an atom or a cell.  An atom is any unsigned integer.  
+    A cell is an ordered pair of any two nouns.
+
+3 Pseudocode
+
+    Brackets enclose cells.  [a b c] is [a [b c]].
+
+    *a is Nock(a).  Reductions match top-down.
+
+4 Reductions
+
+    ?[a b]           => 0
+    ?a               => 1
+
+    ^[a b]           => ^[a b]
+    ^a               => (a + 1)
+
+    =[a a]           => 0
+    =[a b]           => 1
+    =a               => =a
+
+    /[1 a]           => a
+    /[2 a b]         => a
+    /[3 a b]         => b
+    /[(a + a) b]     => /[2 /[a b]]
+    /[(a + a + 1) b] => /[3 /[a b]]
+    /a               => /a
+
+    *[a 0 b]         => /[b a]
+    *[a 1 b]         => b
+    *[a 2 b c d]     => *[a 3 [0 1] 3 [1 c d] [1 0] 3 [1 2 3] [1 0] 5 5 b]
+    *[a 3 b]         => **[a b]
+    *[a 4 b]         => ?*[a b]
+    *[a 5 b]         => ^*[a b]
+    *[a 6 b]         => =*[a b]
+    *[a [b c] d]     => [*[a b c] *[a d]]
+    *a               => *a

pkg/arvo/app/dbug.hoon

@@ -716,7 +716,7 @@
                   'rtt'^(numb (div rtt ~s1))
                   'rttvar'^(numb (div rttvar ~s1))
                   'ssthresh'^(numb ssthresh)
-                  'num-live'^(numb num-live)
+                  'num-live'^(numb ~(wyt by live))
                   'cwnd'^(numb cwnd)
                   'counter'^(numb counter)
               ==

pkg/arvo/app/dojo.hoon

@@ -10,9 +10,9 @@
 ::::                                                    ::  ::::
   ::                                                    ::    ::
 =>  |%                                                  ::  external structures
-    +$  id  @tasession                                  ::  session id
+    +$  id  sole-id                                     ::  session id
     +$  house                                           ::  all state
-      $:  %8
+      $:  %9
           egg=@u                                        ::  command count
           hoc=(map id session)                          ::  conversations
           acl=(set ship)                                ::  remote access whitelist
@@ -820,12 +820,23 @@
       =/  poz=vase  (dy-sore p.cig)
       =/  kev=vase
         =/  kuv=(unit vase)  (slew 7 som)
-        ?:  =(~ q.cig)
-          (fall kuv !>(~))
         =/  soz=(list [var=term vax=vase])
           %~  tap  by
           %-  ~(run by q.cig)
           |=(val=(unit dojo-source) ?~(val !>([~ ~]) (dy-vase p.u.val)))
+        ::  if the generator takes a named argument "drum-session",
+        ::  then if a value isn't already supplied, we set it to the session
+        ::  that this dojo instance is being run in.
+        ::  (dojo is, indeed, quite coupled with drum.)
+        ::
+        =?    soz
+            ?&  ?=(^ kuv)
+                (slab %both %drum-session p.u.kuv)
+                !(~(has by q.cig) %drum-session)
+            ==
+          [[%drum-session !>(ses.id)] soz]  ::TODO  does the who matter?
+        ?:  =(~ soz)
+          (fall kuv !>(~))
         ~|  keyword-arg-failure+~(key by q.cig)
         %+  slap
           (with-faces kuv+(need kuv) rep+(with-faces soz) ~)
@@ -1018,13 +1029,14 @@
     |=  =card:agent:gall
     ^+  +>
     =?  card  ?=(%pass -.card)
-      card(p [id p.card])
+      ^-  card:agent:gall
+      card(p [(scot %p who.id) ses.id p.card])
     %_(+> moz [card moz])
   ::
   ++  he-diff                                           ::  emit update
     |=  fec=sole-effect
     ^+  +>
-    (he-card %give %fact ~[/sole/[id]] %sole-effect !>(fec))
+    (he-card %give %fact ~[(id-to-path:sole id)] %sole-effect !>(fec))
   ::
   ++  he-stop                                           ::  abort work
     ^+  .
@@ -1532,21 +1544,47 @@
 ::
 ++  on-load
   |=  ole=vase
+  ^-  (quip card:agent:gall _..on-init)
   |^  =+  old=!<(house-any ole)
       =?  old  ?=(%5 -.old)
+        ^-  house-any
+        ^-  house-6
         (house-5-to-6 old)
       =?  old  ?=(?(%6 %7) -.old)
         (house-6-7-to-8 +.old)
-      ?>  ?=(%8 -.old)
-      `..on-init(state old)
+      =^  caz  old
+        ?.  ?=(%8 -.old)  [~ old]
+        (house-8-to-9 old)
+      ?>  ?=(%9 -.old)
+      [caz ..on-init(state old)]
   ::
-  +$  house-any  $%(house house-7 house-6 house-5)
+  +$  house-any  $%(house house-8 house-7 house-6 house-5)
+  ::
+  +$  id-8  @tasession
+  +$  house-8
+      $:  %8
+          egg=@u
+          hoc=(map id-8 session)
+          acl=(set ship)
+      ==
+  ++  house-8-to-9
+    |=  old=house-8
+    ^-  (quip card:agent:gall house)
+    :-  %+  turn  ~(tap in ~(key by hoc.old))
+        |=  id=@ta
+        ^-  card:agent:gall
+        [%give %kick ~[/sole/[id]] ~]
+    =-  [%9 egg.old - acl.old]
+    %-  ~(gas by *(map sole-id session))
+    %+  murn  ~(tap by hoc.old)
+    |=  [id=@ta s=session]
+    (bind (upgrade-id:sole id) (late s))
   ::
   +$  house-7        [%7 house-6-7]
   +$  house-6        [%6 house-6-7]
   +$  house-6-7
     $:  egg=@u                                        ::  command count
-        hoc=(map id session-6)                        ::  conversations
+        hoc=(map id-8 session-6)                      ::  conversations
         acl=(set ship)                                ::  remote access whitelist
     ==                                                ::
   +$  session-6                                       ::  per conversation
@@ -1573,9 +1611,10 @@
     old(poy ~, -.dir [our.hid %base ud+0])
   ::
   +$  house-5
-    [%5 egg=@u hoc=(map id session)]
+    [%5 egg=@u hoc=(map id-8 session-6)]
   ++  house-5-to-6
     |=  old=house-5
+    ^-  house-6
     [%6 egg.old hoc.old *(set ship)]
   --
 ::
@@ -1591,7 +1630,8 @@
       he-abet:(~(he-type he hid id.act ~ (~(got by hoc) id.act)) act)
     ::
         %lens-command
-      =+  !<([=id =command:lens] vase)
+      =+  !<([ses=@ta =command:lens] vase)
+      =/  =id  [our.hid ses]
       he-abet:(~(he-lens he hid id ~ (~(got by hoc) id)) command)
     ::
         %allow-remote-login
@@ -1629,8 +1669,7 @@
   ?>  ?|  (team:title our.hid src.hid)
           (~(has in acl) src.hid)
       ==
-  ?>  ?=([%sole @ ~] path)
-  =/  id  i.t.path
+  =/  =id  (need (path-to-id:sole path))
   =?  hoc  (~(has by hoc) id)
     ~&  [%dojo-peer-replaced id]
     (~(del by hoc) id)
@@ -1642,7 +1681,7 @@
 ++  on-leave
   |=  =path
   ?>  ?=([%sole *] path)
-  =.  hoc  (~(del by hoc) t.path)
+  =.  hoc  (~(del by hoc) (need (path-to-id:sole path)))
   [~ ..on-init]
 ::
 ++  on-peek
@@ -1651,13 +1690,15 @@
 ::
 ++  on-agent
   |=  [=wire =sign:agent:gall]
-  ?>  ?=([@ @ *] wire)
-  =/  =session  (~(got by hoc) i.wire)
-  =/  he-full  ~(. he hid i.wire ~ session)
+  ^-  (quip card:agent:gall _..on-init)
+  ?>  ?=([@ @ @ *] wire)
+  =/  =id  [(slav %p i.wire) i.t.wire]
+  =/  =session  (~(got by hoc) id)
+  =/  he-full  ~(. he hid id ~ session)
   =^  moves  state
     =<  he-abet
     ^+  he
-    ?+  i.t.wire  ~|([%dojo-bad-on-agent wire -.sign] !!)
+    ?+  i.t.t.wire  ~|([%dojo-bad-on-agent wire -.sign] !!)
       %poke  (he-unto:he-full t.wire sign)
       %wool  (he-wool:he-full t.wire sign)
     ==
@@ -1665,14 +1706,16 @@
 ::
 ++  on-arvo
   |=  [=wire =sign-arvo]
-  ?>  ?=([@ *] wire)
-  =/  =session  (~(got by hoc) i.wire)
-  =/  he-full  ~(. he hid i.wire ~ session)
+  ^-  (quip card:agent:gall _..on-init)
+  ?>  ?=([@ @ *] wire)
+  =/  =id  [(slav %p i.wire) i.t.wire]
+  =/  =session  (~(got by hoc) id)
+  =/  he-full  ~(. he hid id ~ session)
   =^  moves  state
     =<  he-abet
     ?+    +<.sign-arvo  ~|([%dojo-bad-take +<.sign-arvo] !!)
-        %writ           (he-writ:he-full t.wire +>.sign-arvo)
-        %http-response  (he-http-response:he-full t.wire +>.sign-arvo)
+        %writ           (he-writ:he-full t.t.wire +>.sign-arvo)
+        %http-response  (he-http-response:he-full t.t.wire +>.sign-arvo)
     ==
   [moves ..on-init]
 ::  if dojo fails unexpectedly, kill whatever each session is working on

pkg/arvo/app/herm.hoon

@@ -1,8 +1,13 @@
 ::  herm: stand-in for term.c with http interface
 ::
+/-  herm
 /+  default-agent, dbug, verb
+::  keep relevant mark conversions in cache for performance
+::
 /$  blit-to-json  %blit  %json
 /$  json-to-blit  %json  %blit
+/$  json-to-task  %json  %herm-task
+::
 =,  jael
 |%
 +$  state-0  [%0 ~]
@@ -13,15 +18,18 @@
 %+  verb  |
 %-  agent:dbug
 ^-  agent:gall
+=>  |%
+    ++  pass-session
+      |=  [ses=@tas tas=session-task:dill]
+      [%pass /dill/[ses] %arvo %d %shot ses tas]
+    --
 |_  =bowl:gall
 +*  this  .
     def   ~(. (default-agent this %|) bowl)
 ::
 ++  on-init
   ^-  (quip card:agent:gall _this)
-  ::  set up dill session subscription
-  ::
-  [[%pass [%view %$ ~] %arvo %d %view ~]~ this]
+  [~ this]
 ::
 ++  on-save   !>([%0 ~])
 ++  on-load
@@ -32,47 +40,68 @@
 ++  on-watch
   |=  =path
   ^-  (quip card:agent:gall _this)
-  ?>  =(our src):bowl
-  ?>  ?=([%session @ %view ~] path)
   :_  this
-  ::  scry prompt and cursor position out of dill for initial response
+  ~|  path
+  ?>  ?=([%session @ %view ~] path)
+  =*  ses  i.t.path
+  ::  subscribe to the requested session
   ::
-  =/  base=^path
-    /dx/(scot %p our.bowl)//(scot %da now.bowl)/sessions
-  :~  [%give %fact ~ %blit !>(.^(blit:dill (weld base //line)))]
-      [%give %fact ~ %blit !>(`blit:dill`hop+.^(@ud (weld base //cursor)))]
-  ==
+  ::NOTE  multiple views do not result in multiple subscriptions
+  ::      because they go over the same wire/duct
+  ::
+  [(pass-session ses %view ~)]~
 ::
 ++  on-arvo
   |=  [=wire =sign-arvo]
   ^-  (quip card:agent:gall _this)
+  ~|  wire
   ?+  wire  (on-arvo:def wire sign-arvo)
     [%tube *]  [~ this]  ::  we no longer care about these
   ::
     ::  pass on dill blits for the session
     ::
-      [%view %$ ~]
+      [%dill @ ~]
+    =*  ses  i.t.wire
     ?.  ?=([%dill %blit *] sign-arvo)
       ~|  [%unexpected-sign [- +<]:sign-arvo]
       !!
     :_  this
     %+  turn  p.sign-arvo
     |=  =blit:dill
-    [%give %fact [%session %$ %view ~]~ %blit !>(blit)]
+    [%give %fact [%session ses %view ~]~ %blit !>(blit)]
+  ::
+    ::  clean up old-style subscriptions
+    ::
+      [%view @ ~]
+    =*  ses  i.t.wire
+    :_  this
+    [%pass wire %arvo %d %shot ses %flee ~]~
   ==
 ::
 ++  on-poke
   |=  [=mark =vase]
   ^-  (quip card:agent:gall _this)
-  ?>  =(our src):bowl
-  ?.  ?=(%belt mark)
-    ~|  [%unexpected-mark mark]
-    !!
   :_  this
-  [%pass [%belt %$ ~] %arvo %d %belt !<(belt:dill vase)]~
+  :_  ~
+  ?+  mark  ~|([%unexpected-mark mark] !!)
+    %belt       (pass-session %$ %belt !<(belt:dill vase))
+    %herm-task  (pass-session !<(task:herm vase))
+  ==
+::
+++  on-peek
+  |=  =path
+  ^-  (unit (unit cage))
+  ?+  path  ~
+      [%x %sessions ~]
+    :+  ~  ~
+    :-  %json
+    !>  ^-  json
+    =-  a+(turn ~(tap in -) (lead %s))
+    .^((set @tas) %dy /(scot %p our.bowl)//(scot %da now.bowl)/sessions)
+  ==
 ::
 ++  on-leave  on-leave:def
-++  on-peek   on-peek:def
+::
 ++  on-agent  on-agent:def
 ++  on-fail   on-fail:def
 --

pkg/arvo/app/hood.hoon

@@ -2,8 +2,8 @@
 /+  drum=hood-drum, helm=hood-helm, kiln=hood-kiln
 |%
 +$  state
-  $~  [%24 *state:drum *state:helm *state:kiln]
-  $>(%24 any-state)
+  $~  [%25 *state:drum *state:helm *state:kiln]
+  $>(%25 any-state)
 ::
 +$  any-state
   $%  [ver=?(%1 %2 %3 %4 %5 %6) lac=(map @tas fin-any-state)]
@@ -25,6 +25,7 @@
       [%22 drum=state-4:drum helm=state-1:helm kiln=state-9:kiln]
       [%23 drum=state-4:drum helm=state-2:helm kiln=state-9:kiln]
       [%24 drum=state-4:drum helm=state-2:helm kiln=state-10:kiln]
+      [%25 drum=state-5:drum helm=state-2:helm kiln=state-10:kiln]
   ==
 +$  any-state-tuple
   $:  drum=any-state:drum
@@ -92,8 +93,7 @@
   ::
   ?+  mark  (on-poke:def mark vase)
     %atom            poke-helm(mark %helm-atom)
-    %dill-belt       poke-drum(mark %drum-dill-belt)
-    %dill-blit       poke-drum(mark %drum-dill-blit)
+    %dill-poke       poke-drum
     %hood-sync       poke-kiln(mark %kiln-sync)
     %write-sec-atom  poke-helm(mark %helm-write-sec-atom)
   ==
@@ -108,6 +108,7 @@
   ?+  path  (on-watch:def +<)
     [%drum *]  =^(c drum.state (peer:drum-core t.path) [c this])
     [%kiln *]  =^(c kiln.state (peer:kiln-core t.path) [c this])
+    [%dill *]  =^(c drum.state (peer:drum-core +<) [c this])
   ==
 ::
 ++  on-agent

pkg/arvo/app/lens.hoon

@@ -83,7 +83,8 @@
   ::
   ?+  -.source.com
     :_  this(job.state (some [eyre-id com]))
-    [%pass /sole %agent [our.bowl %dojo] %watch /sole/[eyre-id]]~
+    =/  =path  /sole/(scot %p our.bowl)/[eyre-id]
+    [%pass /sole %agent [our.bowl %dojo] %watch path]~
   ::
       %export
     :_  this(job.state (some [eyre-id com]))

pkg/arvo/app/shoe.hoon

@@ -43,13 +43,13 @@
 ++  on-fail   on-fail:def
 ::
 ++  command-parser
-  |=  sole-id=@ta
+  |=  =sole-id:shoe
   ^+  |~(nail *(like [? command]))
   %+  stag  &
   (perk %demo %row %table ~)
 ::
 ++  tab-list
-  |=  sole-id=@ta
+  |=  =sole-id:shoe
   ^-  (list [@t tank])
   :~  ['demo' leaf+"run example command"]
       ['row' leaf+"print a row"]
@@ -57,7 +57,7 @@
   ==
 ::
 ++  on-command
-  |=  [sole-id=@ta =command]
+  |=  [=sole-id:shoe =command]
   ^-  (quip card _this)
   =;  [to=(list _sole-id) fec=shoe-effect:shoe]
     [[%shoe to fec]~ this]
@@ -87,7 +87,7 @@
   ==
 ::
 ++  can-connect
-  |=  sole-id=@ta
+  |=  =sole-id:shoe
   ^-  ?
   ?|  =(~zod src.bowl)
       (team:title [our src]:bowl)

pkg/arvo/gen/aqua/dojo.hoon

@@ -5,8 +5,8 @@
 :-  %aqua-events
 %+  turn
   ^-  (list unix-event)
-  :~  [/d/term/1 %belt %ctl `@c`%e]
-      [/d/term/1 %belt %ctl `@c`%u]
+  :~  [/d/term/1 %belt %mod %ctl `@c`%e]
+      [/d/term/1 %belt %mod %ctl `@c`%u]
       [/d/term/1 %belt %txt ((list @c) command)]
       [/d/term/1 %belt %ret ~]
   ==

pkg/arvo/gen/hood/link.hoon

@@ -8,9 +8,11 @@
   ::
 :-  %say
 |=  $:  [now=@da eny=@uvJ byk=beak]
-        [arg=$?([dap=term ~] [who=ship dap=term ~]) ~]
+        arg=$?([dap=term ~] [who=ship dap=term ~])
+        drum-session=@ta
     ==
 :-  %drum-link
+:-  drum-session
 ?~  +.arg
   [p.byk dap.arg]
 [who.arg dap.arg]

pkg/arvo/gen/hood/unlink.hoon

@@ -8,9 +8,11 @@
   ::
 :-  %say
 |=  $:  [now=@da eny=@uvJ byk=beak]
-        [arg=$?([dap=term ~] [who=ship dap=term ~]) ~]
+        arg=$?([dap=term ~] [who=ship dap=term ~])
+        drum-session=@ta
     ==
 :-  %drum-unlink
+:-  drum-session
 ?~  +.arg
   [p.byk dap.arg]
 [who.arg dap.arg]

pkg/arvo/lib/dill.hoon

@@ -0,0 +1 @@
+../../base-dev/lib/dill.hoon

pkg/arvo/lib/hood/drum.hoon

@@ -1,34 +1,66 @@
 /-  *sole
 /+  sole
 |%
-+$  state  state-4
++$  state  state-5
 +$  any-state
   $~  *state
-  $%  state-4
+  $%  state-5
+      state-4
       state-3
       state-2
   ==
++$  state-5  [%5 pith-5]
 +$  state-4  [%4 pith-4]
 +$  state-3  [%3 pith-3]
 +$  state-2  [%2 pith-2]
 ::
++$  pith-5
+  $:  bin=(map @ source)                                ::  terminals
+  ==
+::
 +$  pith-4
   $:  eel=(set gill:gall)                               ::  connect to
-      bin=(map bone source)                             ::  terminals
+      bin=(map bone source-4)                           ::  terminals
   ==                                                    ::
 ::
++$  source-4
+  $:  edg=_80
+      off=@ud
+      kil=kill
+      inx=@ud
+      fug=(map gill:gall (unit target-4))
+      mir=(pair @ud stub)
+  ==
+::
++$  target-4
+  $:  $=  blt
+        %+  pair
+          (unit dill-belt-4)
+        (unit dill-belt-4)
+      ris=(unit search)
+      hit=history
+      pom=sole-prompt
+      inp=sole-command
+  ==
+::
++$  dill-belt-4
+  $%  [%ctl p=@c]
+      [%met p=@c]
+      dill-belt:dill
+  ==
+::
 ++  pith-3                                              ::
   $:  eel=(set gill:gall)                               ::  connect to
       ray=(map dude:gall desk)                          ::
       fur=(map dude:gall (unit *))                      ::  servers
-      bin=(map bone source)                             ::  terminals
+      bin=(map bone source-4)                           ::  terminals
   ==                                                    ::
 ::                                                      ::
 ++  pith-2                                              ::
   $:  eel=(set gill:gall)                               ::  connect to
       ray=(set well:gall)                               ::
       fur=(map dude:gall (unit *))                      ::  servers
-      bin=(map bone source)                             ::  terminals
+      bin=(map bone source-4)                           ::  terminals
   ==                                                    ::
 ::                                                      ::
 ++  kill                                                ::  kill ring
@@ -42,6 +74,7 @@
       off=@ud                                           ::  window offset
       kil=kill                                          ::  kill buffer
       inx=@ud                                           ::  ring index
+      eel=(set gill:gall)                               ::  connect to
       fug=(map gill:gall (unit target))                 ::  connections
       mir=(pair @ud stub)                               ::  mirrored terminal
   ==                                                    ::
@@ -65,52 +98,74 @@
       pom=sole-prompt                                   ::  static prompt
       inp=sole-command                                  ::  input state
   ==                                                    ::
+::
 --
 ::                                                      ::  ::
 ::::                                                    ::  ::
   ::                                                    ::  ::
 |%
 ++  en-gill                                           ::  gill to wire
-  |=  gyl=gill:gall
+  |=  [ses=@tas gyl=gill:gall]
   ^-  wire
-  [%drum %phat (scot %p p.gyl) q.gyl ~]
+  [%drum %phat (scot %p p.gyl) q.gyl ?:(=(%$ ses) ~ [ses ~])]
 ::
 ++  de-gill                                           ::  gill from wire
-  |=  way=wire  ^-  gill:gall
-  ~|  way
-  ?>(?=([@ @ *] way) [(slav %p i.way) i.t.way])
+  |=  way=wire
+  ^-  [@tas gill:gall]
+  ~|  wire=way
+  ?>  ?=([@ @ ?(~ [@ ~])] way)
+  :-  ?~(t.t.way %$ i.t.t.way)
+  [(slav %p i.way) i.t.way]
 --
-::  TODO: remove .ost
 ::
 |=  [hid=bowl:gall state]
 =*  sat  +<+
-=/  ost  0
-=+  (~(gut by bin) ost *source)
+=/  ses=@tas  %$
+=+  (~(gut by bin) ses *source)
 =*  dev  -
 =|  moz=(list card:agent:gall)
-=|  biz=(list dill-blit:dill)
+=|  biz=(list blit:dill)  ::TODO  should be per-session
 |%
 ++  this  .
+++  klr   klr:format
 +$  state      ^state      ::  proxy
 +$  any-state  ^any-state  ::  proxy
-++  on-init    (poke-link our.hid %dojo)
+++  on-init    (poke-link %$ our.hid %dojo)
+::
+++  prep
+  |=  s=@tas
+  =.  ses  s
+  =.  dev  (~(gut by bin) ses *source)
+  this
+::
+++  open
+  %+  cork  de-gill
+  |=  [s=@tas g=gill:gall]
+  [g (prep s)]
+::
 ++  diff-sole-effect-phat                             ::  app event
   |=  [way=wire fec=sole-effect]
-  =<  se-abet  =<  se-view
-  =+  gyl=(de-gill way)
+  =<  se-abet
+  =^  gyl  this  (open way)
   ?:  (se-aint gyl)  +>.$
   (se-diff gyl fec)
 ::
 ++  peer                                              ::
   |=  pax=path
+  =?  this  ?=([%dill @ ~] pax)
+    (prep i.t.pax)
   ~|  [%drum-unauthorized our+our.hid src+src.hid]    ::  ourself
   ?>  (team:title our.hid src.hid)                    ::  or our own moon
-  =<  se-abet  =<  se-view
+  =<  se-abet
   (se-text "[{<src.hid>}, driving {<our.hid>}]")
 ::
+++  poke-dill
+  |=  [ses=@tas bet=dill-belt:dill]
+  (poke-dill-belt:(prep ses) bet)
+::
 ++  poke-dill-belt                                    ::  terminal event
   |=  bet=dill-belt:dill
-  =<  se-abet  =<  se-view
+  =<  se-abet
   (se-belt bet)
 ::
 ++  poke-dill-blit                                    ::  terminal output
@@ -118,29 +173,29 @@
   se-abet:(se-blit-sys bit)
 ::
 ++  poke-link                                         ::  connect app
-  |=  gyl=gill:gall
-  =<  se-abet  =<  se-view
-  (se-link gyl)
+  |=  [ses=@tas gyl=gill:gall]
+  =<  se-abet
+  (se-link:(prep ses) gyl)
 ::
 ++  poke-unlink                                       ::  disconnect app
-  |=  gyl=gill:gall
-  =<  se-abet  =<  se-view
-  (se-drop:(se-pull gyl) & gyl)
+  |=  [ses=@ta gyl=gill:gall]
+  =<  se-abet
+  (se-drop:(se-pull:(prep ses) gyl) & gyl)
 ::
 ++  poke-exit                                         ::  shutdown
   |=  ~
   se-abet:(se-blit-sys `dill-blit:dill`[%qit ~])
 ::
 ++  poke-put                                          ::  write file
-  |=  [pax=path txt=@]
+  |=  [pax=path arg=$@(@ [@tas @])]
+  =^  txt  +>  ?@(arg [arg +>] [+.arg (prep -.arg)])
   se-abet:(se-blit-sys [%sav pax txt])                ::
 ::
 ++  poke
   |=  [=mark =vase]
   ?>  =(our src):hid
   ?+  mark  ~|([%poke-drum-bad-mark mark] !!)
-    %drum-dill-belt      =;(f (f !<(_+<.f vase)) poke-dill-belt)
-    %drum-dill-blit      =;(f (f !<(_+<.f vase)) poke-dill-blit)
+    %dill-poke           =;(f (f !<(_+<.f vase)) poke-dill)
     %drum-exit           =;(f (f !<(_+<.f vase)) poke-exit)
     %drum-link           =;(f (f !<(_+<.f vase)) poke-link)
     %drum-put            =;(f (f !<(_+<.f vase)) poke-put)
@@ -149,19 +204,40 @@
 ::
 ++  on-load
   |=  [hood-version=@ud old=any-state]
-  =<  se-abet  =<  se-view
+  =<  se-abet
   =?  old  ?=(%2 -.old)  [%4 [eel bin]:old]
   =?  old  ?=(%3 -.old)  [%4 [eel bin]:old]
+  =?  old  ?=(%4 -.old)
+    |^  5+(~(run by bin.old) source-4-to-5)
+    ++  source-4-to-5
+      |=  source-4
+      ^-  source
+      =;  fug  [edg off kil inx eel.old fug mir]
+      (~(run by fug) |=(t=(unit target-4) (bind t target-4-to-5)))
+    ::
+    ++  target-4-to-5
+      |=  t=target-4
+      ^-  target
+      :_  +.t
+      :-  (bind p.blt.t belt-4-to-5)
+      (bind q.blt.t belt-4-to-5)
+    ::
+    ++  belt-4-to-5
+      |=  b=dill-belt-4
+      ^-  dill-belt:dill
+      ?.  ?=(?(%ctl %met) -.b)  b
+      [%mod -.b p.b]
+    --
   ::
-  ?>  ?=(%4 -.old)
+  ?>  ?=(%5 -.old)
   =.  sat  old
-  =.  dev  (~(gut by bin) ost *source)
+  =.  dev  (~(gut by bin) ses *source)
   this
 ::
 ++  reap-phat                                         ::  ack connect
   |=  [way=wire saw=(unit tang)]
-  =<  se-abet  =<  se-view
-  =+  gyl=(de-gill way)
+  =<  se-abet
+  =^  gyl  this  (open way)
   ?~  saw
     (se-join gyl)
   ::  Don't print stack trace because we probably just crashed to
@@ -171,9 +247,9 @@
 ::
 ++  take-coup-phat                                    ::  ack poke
   |=  [way=wire saw=(unit tang)]
-  =<  se-abet  =<  se-view
+  =<  se-abet
   ?~  saw  +>
-  =+  gyl=(de-gill way)
+  =^  gyl  this  (open way)
   ?:  (se-aint gyl)  +>.$
   %-  se-dump:(se-drop:(se-pull gyl) & gyl)
   :_  u.saw
@@ -196,8 +272,8 @@
 ::
 ++  quit-phat                                         ::
   |=  way=wire
-  =<  se-abet  =<  se-view
-  =+  gyl=(de-gill way)
+  =<  se-abet
+  =^  gyl  this  (open way)
   ~&  [%drum-quit src.hid gyl]
   (se-drop %| gyl)
 ::                                                    ::  ::
@@ -205,13 +281,18 @@
   ::                                                  ::  ::
 ++  se-abet                                           ::  resolve
   ^-  (quip card:agent:gall state)
-  =.  .  se-subze:se-adze
-  :_  sat(bin (~(put by bin) ost dev))
+  =.  .  se-view:se-subze:se-adze
+  :_  sat(bin (~(put by bin) ses dev))
   ^-  (list card:agent:gall)
   ?~  biz  (flop moz)
   :_  (flop moz)
-  =/  =dill-blit:dill  ?~(t.biz i.biz [%mor (flop biz)])
-  [%give %fact ~[/drum] %dill-blit !>(dill-blit)]
+  =/  =blit:dill  ?~(t.biz i.biz [%mor (flop biz)])
+  ::TODO  remove /drum after dill cleans up
+  ::TODO  but once we remove it, the empty trailing segment of
+  ::      /dill/[ses] would prevent outsiders from subscribing
+  ::      to the default session...
+  =/  to=(list path)  [/dill/[ses] ?~(ses ~[/drum] ~)]
+  [%give %fact to %dill-blit !>(blit)]
 ::
 ++  se-adze                                           ::  update connections
   ^+  .
@@ -230,14 +311,14 @@
   (se-peer gil)
 ::
 ++  se-subze                                          ::  downdate connections
-  =<  .(dev (~(got by bin) ost))
-  =.  bin  (~(put by bin) ost dev)
+  =<  .(dev (~(got by bin) ses))
+  =.  bin  (~(put by bin) ses dev)
   ^+  .
   %-  ~(rep by bin)
   =<  .(con +>)
-  |:  $:,[[ost=bone dev=source] con=_.]  ^+  con
-  =+  xeno=se-subze-local:%_(con ost ost, dev dev)
-  xeno(ost ost.con, dev dev.con, bin (~(put by bin) ost dev.xeno))
+  |:  $:,[[ses=@tas dev=source] con=_.]  ^+  con
+  =+  xeno=se-subze-local:%_(con ses ses, dev dev)
+  xeno(ses ses.con, dev dev.con, bin (~(put by bin.xeno) ses dev.xeno))
 ::
 ++  se-subze-local
   ^+  .
@@ -252,7 +333,7 @@
 ++  se-aint                                           ::  ignore result
   |=  gyl=gill:gall
   ^-  ?
-  ?.  (~(has by bin) ost)  &
+  ?.  (~(has by bin) ses)  &
   =+  gyr=(~(get by fug) gyl)
   |(?=(~ gyr) ?=(~ u.gyr))
 ::
@@ -290,7 +371,7 @@
       [%cru *]  (se-dump:(se-text (trip p.bet)) q.bet)
       [%hey *]  +>(mir [0 ~])                         ::  refresh
       [%rez *]  +>(edg (dec p.bet))                   ::  resize window
-      [%yow *]  ~&([%no-yow -.bet] +>)
+      [%yow *]  (se-link p.bet)
     ==
   =+  gul=se-agon
   ?:  |(?=(~ gul) (se-aint u.gul))
@@ -341,6 +422,21 @@
     leaf+(weld (scag (sub edg 3) tape) "...")
   leaf+tape
 ::
+++  se-blin                                           ::  print and newline
+  |=  $=  lin
+      $~  [%put ~]
+      $>(?(%put %klr) dill-blit:dill)
+  ^+  +>
+  ::  newline means we need to redraw the prompt,
+  ::  so update the prompt mirror accordingly.
+  ::
+  =.  mir  [0 ~]
+  ::TODO  doing hops and wyps conditionally based on the mirror state seems
+  ::      better, but doesn't cover edge cases. results in dojo's ">=" being
+  ::      rendered alongside the prompt in scrollback, for example.
+  ::      figure out a way to make that work!
+  (se-blit %mor [%hop 0] [%wyp ~] lin [%nel ~] ~)
+::
 ++  se-dump                                           ::  print tanks
   |=  tac=(list tank)
   ^+  +>
@@ -351,7 +447,7 @@
   ?.  ((sane %t) (crip i.wol))  :: XX upstream validation
     ~&  bad-text+<`*`i.wol>
     $(wol t.wol)
-  $(wol t.wol, +>.^$ (se-blit %out (tuba i.wol)))
+  $(wol t.wol, +>.^$ (se-blin %put (tuba i.wol)))
 ::
 ++  se-join                                           ::  confirm connection
   |=  gyl=gill:gall
@@ -379,20 +475,21 @@
   +>(eel (~(put in eel) gyl))
 ::
 ++  se-blit                                           ::  give output
-  |=  bil=dill-blit:dill
+  |=  bil=blit:dill
   +>(biz [bil biz])
 ::
 ++  se-blit-sys                                       ::  output to system
   |=  bil=dill-blit:dill  ^+  +>
-  (se-emit %give %fact ~[/drum] %dill-blit !>(bil))
+  ::TODO  remove /drum after dill cleans up
+  (se-emit %give %fact ~[/drum /dill/[ses]] %dill-blit !>(bil))
 ::
 ++  se-show                                           ::  show buffer, raw
   |=  lin=(pair @ud stub)
   ^+  +>
   ?:  =(mir lin)  +>
-  =.  +>  ?:(=(p.mir p.lin) +> (se-blit %hop p.lin))
-  =.  +>  ?:(=(q.mir q.lin) +> (se-blit %pom q.lin))
-  +>(mir lin)
+  %-  se-blit(mir lin)
+  ?:  =(q.mir q.lin)  [%hop p.lin]
+  mor+[[%hop 0] [%wyp ~] [%klr q.lin] [%hop p.lin] ~]
 ::
 ++  se-just                                           ::  adjusted buffer
   |=  [pom=stub lin=(pair @ud (list @c))]
@@ -430,22 +527,22 @@
   ?.  ((sane %t) (crip txt))  :: XX upstream validation
     ~&  bad-text+<`*`txt>
     +>
-  (se-blit %out (tuba txt))
+  (se-blin %put (tuba txt))
 ::
 ++  se-poke                                           ::  send a poke
   |=  [gyl=gill:gall par=cage]
-  (se-emit %pass (en-gill gyl) %agent gyl %poke par)
+  (se-emit %pass (en-gill ses gyl) %agent gyl %poke par)
 ::
 ++  se-peer                                           ::  send a peer
   |=  gyl=gill:gall
   ~>  %slog.0^leaf/"drum: link {<[p q]:gyl>}"
-  =/  =path  /sole/(cat 3 'drum_' (scot %p our.hid))
+  =/  =path  (id-to-path:sole our.hid ses)
   %-  se-emit(fug (~(put by fug) gyl ~))
-  [%pass (en-gill gyl) %agent gyl %watch path]
+  [%pass (en-gill ses gyl) %agent gyl %watch path]
 ::
 ++  se-pull                                           ::  cancel subscription
   |=  gyl=gill:gall
-  (se-emit %pass (en-gill gyl) %agent gyl %leave ~)
+  (se-emit %pass (en-gill ses gyl) %agent gyl %leave ~)
 ::
 ++  se-tame                                           ::  switch connection
   |=  gyl=gill:gall
@@ -470,7 +567,7 @@
     ^+  +>
     (ta-poke %sole-action !>(act))
   ::
-  ++  ta-id  (cat 3 'drum_' (scot %p our.hid))        ::  per-ship duct id
+  ++  ta-id  [our.hid ses]                            ::  per-ship-session id
   ::
   ++  ta-aro                                          ::  hear arrow
     |=  key=?(%d %l %r %u)
@@ -499,13 +596,19 @@
     ?<  ?=([?(%cru %hey %rez %yow) *] bet)            ::  target-specific
     =.  blt  [q.blt `bet]                             ::  remember belt
     ?-  bet
+      @         (ta-txt bet ~)
       [%aro *]  (ta-aro p.bet)
       [%bac *]  ta-bac
-      [%ctl *]  (ta-ctl p.bet)
       [%del *]  ta-del
-      [%met *]  (ta-met p.bet)
+      [%hit *]  (ta-hit +.bet)
       [%ret *]  ta-ret
       [%txt *]  (ta-txt p.bet)
+    ::
+        [%mod *]
+      ?+  mod.bet  $(bet key.bet)
+        %ctl  (ta-ctl key.bet)
+        %met  (ta-met key.bet)
+      ==
     ==
   ::
   ++  ta-det                                          ::  send edit
@@ -529,7 +632,7 @@
     (ta-hom %del (dec pos.inp))
   ::
   ++  ta-ctl                                          ::  hear control
-    |=  key=@ud
+    |=  key=bolt:dill
     ^+  +>
     =.  ris  ?.(?=(?(%g %r) key) ~ ris)
     ?+    key    ta-bel
@@ -539,7 +642,7 @@
         %d  ?^  buf.say.inp
               ta-del
             ?:  =([our.hid %dojo] gyl)
-              +>(..ta (se-blit qit+~))                ::  quit pier
+              +>(..ta (se-blit-sys %qit ~))           ::  quit pier
             +>(..ta (se-klin gyl))                    ::  unlink app
         %e  +>(pos.inp (lent buf.say.inp))
         %f  (ta-aro %r)
@@ -550,7 +653,7 @@
             ?:  =(pos.inp len)
               ta-bel
             (ta-kil %r [pos.inp (sub len pos.inp)])
-        %l  +>(..ta (se-blit %clr ~))
+        %l  +>(..ta (se-blit(q.mir ~) %clr ~))
         %n  (ta-aro %d)
         %p  (ta-aro %u)
         %r  ?~  ris
@@ -583,6 +686,14 @@
       ta-bel
     (ta-hom %del pos.inp)
   ::
+  ++  ta-hit                                          ::  hear click
+    |=  [x=@ud y=@ud]
+    ^+  +>
+    =/  pol=@ud
+      (lent-char:klr (make:klr cad.pom))
+    =?  x  (lth x pol)  pol
+    +>.$(pos.inp (min (sub x pol) (lent buf.say.inp)))
+  ::
   ++  ta-erl                                          ::  hear local error
     |=  pos=@ud
     ta-bel(pos.inp (min pos (lent buf.say.inp)))
@@ -594,14 +705,13 @@
   ++  ta-fec                                          ::  apply effect
     |=  fec=sole-effect
     ^+  +>
-    ?-  fec
+    ?+  fec  +>(..ta (se-blit fec))
       [%bel *]  ta-bel
       [%blk *]  +>
       [%bye *]  +>(..ta (se-klin gyl))
-      [%clr *]  +>(..ta (se-blit fec))
       [%det *]  (ta-got +.fec)
       [%err *]  (ta-err p.fec)
-      [%klr *]  +>(..ta (se-blit %klr (make:klr p.fec)))
+      [%klr *]  +>(..ta (se-blin %klr (make:klr p.fec)))
       [%mor *]  |-  ^+  +>.^$
                 ?~  p.fec  +>.^$
                 $(p.fec t.p.fec, +>.^$ ^$(fec i.p.fec))
@@ -609,10 +719,8 @@
       [%pro *]  (ta-pro +.fec)
       [%tab *]  +>(..ta (se-tab p.fec))
       [%tan *]  +>(..ta (se-dump p.fec))
-      [%sag *]  +>(..ta (se-blit fec))
-      [%sav *]  +>(..ta (se-blit fec))
       [%txt *]  +>(..ta (se-text p.fec))
-      [%url *]  +>(..ta (se-blit fec))
+      [%url *]  +>(..ta (se-text:(se-blit fec) (trip p.fec)))
     ==
   ::
   ++  ta-dog                                          ::  change cursor
@@ -664,8 +772,8 @@
         kil
       ?.  ?&  ?=(^ old.kil)
               ?=(^ p.blt)
-              ?|  ?=([%ctl ?(%k %u %w)] u.p.blt)
-                  ?=([%met ?(%d %bac)] u.p.blt)
+              ?|  ?=([%mod %ctl ?(%k %u %w)] u.p.blt)
+                  ?=([%mod %met ?(%d [%bac ~])] u.p.blt)
           ==  ==
         %=  kil                                       ::  prepend
           num  +(num.kil)
@@ -682,17 +790,18 @@
     ==
   ::
   ++  ta-met                                          ::  meta key
-    |=  key=@ud
+    |=  key=bolt:dill
     ^+  +>
     =.  ris  ~
     ?+    key    ta-bel
-      %dot  ?.  &(?=(^ old.hit) ?=(^ i.old.hit))      ::  last "arg" from hist
+      %'.'  ?.  &(?=(^ old.hit) ?=(^ i.old.hit))      ::  last "arg" from hist
               ta-bel
             =+  old=`(list @c)`i.old.hit
             =+  sop=(ta-jump(buf.say.inp old) %l %ace (lent old))
             (ta-hom (cat:edit pos.inp (slag sop old)))
             ::
-      %bac  ?:  =(0 pos.inp)                          ::  kill left-word
+      [%bac ~]
+            ?:  =(0 pos.inp)                          ::  kill left-word
               ta-bel
             =+  sop=(ta-pos %l %edg pos.inp)
             (ta-kil %l [(sub pos.inp sop) sop])
@@ -748,8 +857,8 @@
             ::
       %y    ?.  ?&  ?=(^ old.kil)                     ::  rotate & yank
                     ?=(^ p.blt)
-                    ?|  ?=([%ctl %y] u.p.blt)
-                        ?=([%met %y] u.p.blt)
+                    ?|  ?=([%mod %ctl %y] u.p.blt)
+                        ?=([%mod %met %y] u.p.blt)
                 ==  ==
               ta-bel
             =+  las=(lent ta-yan)
@@ -927,82 +1036,4 @@
     ?:  |(?=(~ a) (alnm i.a))  i
     $(i +(i), a t.a)
   --
-::
-++  klr                                               ::  styx/stub engine
-  =,  dill
-  |%
-  ++  make                                            ::  stub from styx
-    |=  a=styx  ^-  stub
-    =|  b=stye
-    %+  reel
-    |-  ^-  stub
-    %-  zing  %+  turn  a
-    |=  a=$@(@t (pair styl styx))
-    ?@  a  [b (tuba (trip a))]~
-    ^$(a q.a, b (styd p.a b))
-    ::
-    |=  [a=(pair stye (list @c)) b=stub]
-    ?~  b  [a ~]
-    ?.  =(p.a p.i.b)  [a b]
-    [[p.a (weld q.a q.i.b)] t.b]
-  ::
-  ++  styd                                            ::  stye from styl
-    |=  [a=styl b=stye]  ^+  b                        ::  with inheritance
-    :+  ?~  p.a  p.b
-        ?~  u.p.a  ~
-        (~(put in p.b) u.p.a)
-     (fall p.q.a p.q.b)
-     (fall q.q.a q.q.b)
-  ::
-  ++  lent-char
-    |=  a=stub  ^-  @
-    (roll (lnts-char a) add)
-  ::
-  ++  lnts-char                                       ::  stub pair tail lengths
-    |=  a=stub  ^-  (list @)
-    %+  turn  a
-    |=  a=(pair stye (list @c))
-    (lent q.a)
-  ::
-  ++  brek                                            ::  index + incl-len of
-    |=  [a=@ b=(list @)]                              ::  stub pair w= idx a
-    =|  [c=@ i=@]
-    |-  ^-  (unit (pair @ @))
-    ?~  b  ~
-    =.  c  (add c i.b)
-    ?:  (gte c a)
-      `[i c]
-    $(i +(i), b t.b)
-  ::
-  ++  slag                                            ::  slag stub, keep stye
-    |=  [a=@ b=stub]
-    ^-  stub
-    =+  c=(lnts-char b)
-    =+  i=(brek a c)
-    ?~  i  b
-    =+  r=(^slag +(p.u.i) b)
-    ?:  =(a q.u.i)
-      r
-    =+  n=(snag p.u.i b)
-    :_  r  :-  p.n
-    (^slag (sub (snag p.u.i c) (sub q.u.i a)) q.n)
-  ::
-  ++  scag                                            ::  scag stub, keep stye
-    |=  [a=@ b=stub]
-    ^-  stub
-    =+  c=(lnts-char b)
-    =+  i=(brek a c)
-    ?~  i  b
-    ?:  =(a q.u.i)
-      (^scag +(p.u.i) b)
-    %+  welp
-      (^scag p.u.i b)
-    =+  n=(snag p.u.i b)
-    :_  ~  :-  p.n
-    (^scag (sub (snag p.u.i c) (sub q.u.i a)) q.n)
-  ::
-  ++  swag                                            ::  swag stub, keep stye
-    |=  [[a=@ b=@] c=stub]
-    (scag b (slag a c))
-  --
 --

pkg/arvo/lib/hood/kiln.hoon

@@ -504,7 +504,7 @@
       [%x %kiln %pikes ~]
     =+  .^(=rock:tire %cx /(scot %p our)//(scot %da now)/tire)
     :^  ~  ~  %kiln-pikes
-    !>  ^-  pikes   
+    !>  ^-  pikes
     %-  ~(rut by rock)
     |=  [=desk =zest wic=(set weft)]
     ^-  pike

pkg/arvo/mar/dill/belt.hoon

@@ -45,8 +45,8 @@
       =+  cha=(tuba (trip q.kev))
       ?>  ?=([@ ~] cha)               ::  of a single character
       ?+  mod  !!                     ::  modified by one buckykey
-        [%ctrl ~ ~]  [%ctl i.cha]
-        [%alt ~ ~]   [%met i.cha]
+        [%ctrl ~ ~]  [%mod %ctl i.cha]
+        [%alt ~ ~]   [%mod %met i.cha]
       ==
     ?@  q.kev
       [%txt (tuba (trip q.kev))]

pkg/arvo/mar/dill/blit.hoon

@@ -19,8 +19,10 @@
     ^-  ^json
     ?+  -.dib  ~|(unsupported-blit+-.dib !!)
       %mor  [%a (turn p.dib |=(a=dill-blit:dill json(dib a)))]
-      %hop  (frond %hop (numb p.dib))
-      ?(%pro %out)  (frond -.dib (tape (tufa p.dib)))
+      %hop  %+  frond  %hop
+            ?@  p.dib  (numb p.dib)
+            (pairs 'x'^(numb x.p.dib) 'y'^(numb y.p.dib) ~)
+      %put  (frond -.dib (tape (tufa p.dib)))
       ?(%bel %clr)  (frond %act %s -.dib)
     ==
   --

pkg/arvo/mar/drum-put.hoon

@@ -1,8 +1,7 @@
+::  %drum-put: download into host system
 ::
-::::  /hoon/do-claim/womb/mar
-  ::
 /?    310
-|_  [path @]
+|_  [path $@(@ [@ta @])]
 ::
 ++  grad  %noun
 ++  grow
@@ -11,6 +10,6 @@
   --
 ++  grab                                                ::  convert from
   |%
-  +$  noun  [path @]                                    ::  clam from %noun
+  +$  noun  [path $@(@ [@ta @])]                        ::  clam from %noun
   --
 --

pkg/arvo/mar/herm/task.hoon

@@ -0,0 +1,46 @@
+::  task: herm task for passthrough to dill
+::
+/-  herm
+/+  dill
+::
+|_  =task:herm
+++  grad  %noun
+::  +grab: convert from
+::
+++  grab
+  |%
+  ++  noun  task:herm
+  ::
+  ++  json
+    |=  jon=^json
+    ^+  task
+    ~|  jon
+    ?>  ?=([%o *] jon)
+    =+  ses=(~(got by p.jon) 'session')
+    ?>  ?=([%s *] ses)
+    :-  ?:  =('' p.ses)  %$
+        (slav %tas p.ses)
+    =.  p.jon  (~(del by p.jon) 'session')
+    %.  jon
+    =,  dejs:format
+    |^  task
+    ++  task
+      %-  of
+      :~  belt+belt:dejs:^dill
+          blew+(ot 'w'^ni 'h'^ni ~)
+          hail+ul
+          open+(ot 'term'^(se %tas) 'apps'^(ar gill) ~)
+          shut+ul
+      ==
+    ::
+    ++  gill
+      (ot 'who'^(se %p) 'app'^(se %tas) ~)
+    --
+  --
+::  +grow: convert to
+::
+++  grow
+  |%
+  ++  noun  task
+  --
+--

pkg/arvo/sur/herm.hoon

@@ -0,0 +1,9 @@
+::  herm: stand-in for term.c with http interface
+::
+|%
++$  task
+  $~  [%$ %hail ~]
+  $:  session=@tas
+      task=$>(?(%open %shut %belt %blew %hail) session-task:dill)
+  ==
+--

pkg/arvo/sys.kelvin

@@ -1 +1 @@
-[%zuse 417]
+[%zuse 416]

pkg/arvo/sys/arvo.hoon

@@ -415,7 +415,7 @@
     ==
   --
 ::
-::  |de: axal engine
+::  |of: axal engine
 ::
 ++  of
   =|  fat=(axal)

pkg/arvo/sys/lull.hoon

@@ -3,7 +3,7 @@
 !:
 =>  ..part
 |%
-++  lull  %328
+++  lull  %327
 ::                                                      ::  ::
 ::::                                                    ::  ::  (1) models
   ::                                                    ::  ::
@@ -752,7 +752,6 @@
         [%hill p=(list @tas)]                           ::  mount points
         [%done error=(unit error:ames)]                 ::  ames message (n)ack
         [%mere p=(each (set path) (pair term tang))]    ::  merge result
-        [%note p=@tD q=tank]                            ::  debug message
         [%ogre p=@tas]                                  ::  delete mount point
         [%rule red=dict wit=dict]                       ::  node r+w permissions
         [%tire p=(each rock:tire wave:tire)]            ::  app state
@@ -1160,9 +1159,7 @@
 ++  dill  ^?
   |%
   +$  gift                                              ::  out result <-$
-    $%  [%bbye ~]                                       ::  reset prompt
-        [%blit p=(list blit)]                           ::  terminal output
-        [%burl p=@t]                                    ::  activate url
+    $%  [%blit p=(list blit)]                           ::  terminal output
         [%logo ~]                                       ::  logout
         [%meld ~]                                       ::  unify memory
         [%pack ~]                                       ::  compact memory
@@ -1170,29 +1167,32 @@
     ==                                                  ::
   +$  task                                              ::  in request ->$
     $~  [%vega ~]                                       ::
-    $%  [%belt p=belt]                                  ::  terminal input
-        [%blew p=blew]                                  ::  terminal config
-        [%boot lit=? p=*]                               ::  weird %dill boot
+    $%  [%boot lit=? p=*]                               ::  weird %dill boot
         [%crop p=@ud]                                   ::  trim kernel state
         [%crud p=@tas q=(list tank)]                    ::  print error
-        [%flee session=~]                               ::  unwatch session
         [%flog p=flog]                                  ::  wrapped error
-        [%flow p=@tas q=(list gill:gall)]               ::  terminal config
-        [%hail ~]                                       ::  terminal refresh
         [%heft ~]                                       ::  memory report
-        [%hook ~]                                       ::  this term hung up
-        [%harm ~]                                       ::  all terms hung up
         $>(%init vane-task)                             ::  after gall ready
         [%meld ~]                                       ::  unify memory
-        [%noop ~]                                       ::  no operation
         [%pack ~]                                       ::  compact memory
-        [%talk p=tank]                                  ::
-        [%text p=tape]                                  ::
-        [%view session=~]                               ::  watch session blits
+        [%shot ses=@tas task=session-task]              ::  task for session
+        [%talk p=(list tank)]                           ::  print tanks
+        [%text p=tape]                                  ::  print tape
         $>(%trim vane-task)                             ::  trim state
         $>(%vega vane-task)                             ::  report upgrade
         [%verb ~]                                       ::  verbose mode
         [%knob tag=term level=?(%hush %soft %loud)]     ::  error verbosity
+        session-task                                    ::  for default session
+    ==                                                  ::
+  ::                                                    ::
+  +$  session-task                                      ::  session request
+    $%  [%belt p=belt]                                  ::  terminal input
+        [%blew p=blew]                                  ::  terminal config
+        [%flee ~]                                       ::  unwatch session
+        [%hail ~]                                       ::  terminal refresh
+        [%open p=dude:gall q=(list gill:gall)]          ::  setup session
+        [%shut ~]                                       ::  close session
+        [%view ~]                                       ::  watch session blits
     ==                                                  ::
   ::
   ::::                                                  ::  (1d2)
@@ -1200,59 +1200,41 @@
   +$  blew  [p=@ud q=@ud]                               ::  columns rows
   +$  belt                                              ::  client input
     $?  bolt                                            ::  simple input
-    $%  [%mod mod=?(%ctl %met %hyp) key=bolt]           ::  w/ modifier
+        [%mod mod=?(%ctl %met %hyp) key=bolt]           ::  w/ modifier
         [%txt p=(list @c)]                              ::  utf32 text
         ::TODO  consider moving %hey, %rez, %yow here   ::
-        ::TMP  forward backwards-compatibility          ::
-        ::                                              ::
-        [%ctl p=@c]                                     ::
-        [%met p=@c]                                     ::
-    ==  ==                                              ::
+    ==                                                  ::
   +$  bolt                                              ::  simple input
     $@  @c                                              ::  simple keystroke
     $%  [%aro p=?(%d %l %r %u)]                         ::  arrow key
         [%bac ~]                                        ::  true backspace
         [%del ~]                                        ::  true delete
-        [%hit r=@ud c=@ud]                              ::  mouse click
+        [%hit x=@ud y=@ud]                              ::  mouse click
         [%ret ~]                                        ::  return
     ==                                                  ::
-  +$  blit                                              ::  old blit
+  +$  blit                                              ::  client output
     $%  [%bel ~]                                        ::  make a noise
         [%clr ~]                                        ::  clear the screen
-        [%hop p=@ud]                                    ::  set cursor position
-        [%klr p=stub]                                   ::  set styled line
-        [%lin p=(list @c)]                              ::  set current line
-        [%mor ~]                                        ::  newline
+        [%hop p=$@(@ud [x=@ud y=@ud])]                  ::  set cursor col/pos
+        [%klr p=stub]                                   ::  put styled
+        [%mor p=(list blit)]                            ::  multiple blits
+        [%nel ~]                                        ::  newline
+        [%put p=(list @c)]                              ::  put text at cursor
         [%sag p=path q=*]                               ::  save to jamfile
         [%sav p=path q=@]                               ::  save to file
         [%url p=@t]                                     ::  activate url
+        [%wyp ~]                                        ::  wipe cursor line
     ==                                                  ::
-  +$  dill-belt                                         ::  new belt
-    $%  [%aro p=?(%d %l %r %u)]                         ::  arrow key
-        [%bac ~]                                        ::  true backspace
+  +$  dill-belt                                         ::  arvo input
+    $%  belt                                            ::  client input
         [%cru p=@tas q=(list tank)]                     ::  echo error
-        [%ctl p=@]                                      ::  control-key
-        [%del ~]                                        ::  true delete
         [%hey ~]                                        ::  refresh
-        [%met p=@]                                      ::  meta-key
-        [%ret ~]                                        ::  return
         [%rez p=@ud q=@ud]                              ::  resize, cols, rows
-        [%txt p=(list @c)]                              ::  utf32 text
         [%yow p=gill:gall]                              ::  connect to app
     ==                                                  ::
-  +$  dill-blit                                         ::  new blit
-    $%  [%bel ~]                                        ::  make a noise
-        [%clr ~]                                        ::  clear the screen
-        [%hop p=@ud]                                    ::  set cursor position
-        [%klr p=stub]                                   ::  styled text
-        [%mor p=(list dill-blit)]                       ::  multiple blits
-        [%pom p=stub]                                   ::  styled prompt
-        [%pro p=(list @c)]                              ::  show as cursor+line
+  +$  dill-blit                                         ::  arvo output
+    $%  blit                                            ::  client output
         [%qit ~]                                        ::  close console
-        [%out p=(list @c)]                              ::  send output line
-        [%sag p=path q=*]                               ::  save to jamfile
-        [%sav p=path q=@]                               ::  save to file
-        [%url p=@t]                                     ::  activate url
     ==                                                  ::
   +$  flog                                              ::  sent to %dill
     $%  [%crop p=@ud]                                   ::  trim kernel state
@@ -1263,6 +1245,11 @@
         [%text p=tape]                                  ::
         [%verb ~]                                       ::  verbose mode
     ==                                                  ::
+  ::                                                    ::
+  +$  poke                                              ::  dill to userspace
+    $:  ses=@tas                                        ::  target session
+        dill-belt                                       ::  input
+    ==                                                  ::
   --  ::dill
 ::                                                      ::::
 ::::                    ++eyre                            ::  (1e) http-server
@@ -1763,7 +1750,6 @@
   +$  gift                                              ::  outgoing result
     $%  [%boon payload=*]                               ::  ames response
         [%done error=(unit error:ames)]                 ::  ames message (n)ack
-        [%onto p=(each suss tang)]                      ::  about agent
         [%unto p=unto]                                  ::
     ==                                                  ::
   +$  task                                              ::  incoming request
@@ -2531,9 +2517,6 @@
       ::  %ames: hear packet
       ::
       $>(%hear task:ames)
-      ::  %dill: hangup
-      ::
-      $>(%hook task:dill)
       ::  %clay: external edit
       ::
       $>(%into task:clay)
@@ -2554,6 +2537,9 @@
       ::  %eyre: starts handling an backdoor http request
       ::
       $>(%request-local task:eyre)
+      ::  %dill: close session
+      ::
+      $>(%shut task:dill)
       ::  %behn: wakeup
       ::
       $>(%wake task:behn)

pkg/arvo/sys/vane/ames.hoon

@@ -733,6 +733,7 @@
       $%  [%private-keys ~]
           [%public-keys ships=(set ship)]
           [%turf ~]
+          [%ruin ships=(set ship)]
       ==  ==
       $:  @tas
       $%  [%plea =ship =plea]
@@ -1247,7 +1248,7 @@
           =(%$ syd)
       ==
     ?.  for.veb.bug.ames-state  ~
-    ~>  %slog.0^leaf/"ames: scry-fail {<[why=why lot=lot now=now syd=syd]>}"
+    ~>  %slog.0^leaf/"ames: scry-fail {<why=why lot=lot now=now syd=syd>}"
     ~
   ::  /ax/protocol/version           @
   ::  /ax/peers                      (map ship ?(%alien %known))
@@ -1774,28 +1775,30 @@
         |.  ^-  tape
         =/  sndr  [our our-life.channel]
         =/  rcvr  [ship her-life.channel]
-        "plea {<sndr^rcvr^bone=bone^vane.plea^path.plea>}"
+        "plea {<sndr rcvr bone=bone vane.plea path.plea>}"
     abet:(on-memo:(make-peer-core peer-state channel) bone plea %plea)
   ::  +on-cork: handle request to kill a flow
   ::
   ++  on-cork
     |=  =ship
     ^+  event-core
+    =/  =plea       [%$ /flow [%cork ~]]
     =/  ship-state  (~(get by peers.ames-state) ship)
-    ::
-    ?>  ?=([~ %known *] ship-state)
+    ?.  ?=([~ %known *] ship-state)
+      %+  enqueue-alien-todo  ship
+      |=  todos=alien-agenda
+      todos(messages [[duct plea] messages.todos])
     =/  =peer-state  +.u.ship-state
     =/  =channel     [[our ship] now channel-state -.peer-state]
     ::
     =^  =bone  ossuary.peer-state  (bind-duct ossuary.peer-state duct)
-    =/  =plea  [%$ /flow [%cork ~]]
     ::
     =.  closing.peer-state  (~(put in closing.peer-state) bone)
     %-  %^  trace  msg.veb  ship
         |.  ^-  tape
         =/  sndr  [our our-life.channel]
         =/  rcvr  [ship her-life.channel]
-        "cork plea {<sndr^rcvr^bone=bone^vane.plea^path.plea>}"
+        "cork plea {<sndr rcvr bone=bone vane.plea path.plea>}"
     abet:(on-memo:(make-peer-core peer-state channel) bone plea %plea)
   ::  +on-take-wake: receive wakeup or error notification from behn
   ::
@@ -1923,14 +1926,14 @@
       ::  we shouldn't be hearing about ships we don't care about
       ::
       ?~  ship-state
-        ~>  %slog.0^leaf/"ames: breach unknown {<our^ship>}"
+        ~>  %slog.0^leaf/"ames: breach unknown {<our ship>}"
         event-core
       ::  if an alien breached, this doesn't affect us
       ::
       ?:  ?=([~ %alien *] ship-state)
-        ~>  %slog.0^leaf/"ames: breach alien {<our^ship>}"
+        ~>  %slog.0^leaf/"ames: breach alien {<our ship>}"
         event-core
-      ~>  %slog.0^leaf/"ames: breach peer {<our^ship>}"
+      ~>  %slog.0^leaf/"ames: breach peer {<our ship>}"
       ::  a peer breached; drop messaging state
       ::
       =/  =peer-state  +.u.ship-state
@@ -2063,6 +2066,8 @@
         =.  event-core
           %+  reel  messages.todos
           |=  [[=^duct =plea] core=_event-core]
+          ?:  ?=(%$ -.plea)
+            (on-cork:core(duct duct) ship)
           (on-plea:core(duct duct) ship plea)
         ::  apply outgoing packet blobs
         ::
@@ -2141,10 +2146,27 @@
     ::
     (emit unix-duct.ames-state %give %turf turfs)
   ::  +on-vega: handle kernel reload
-  ::  +on-trim: handle request to free memory
   ::
   ++  on-vega  event-core
-  ++  on-trim  event-core
+  ::  +on-trim: handle request to free memory
+  ::
+  ::  %ruin comets not seen for six months
+  ::
+  ++  on-trim
+    ^+  event-core
+    =;  rui=(set @p)
+      (emit duct %pass /ruin %j %ruin rui)
+    =-  (silt (turn - head))
+    %+  skim
+      ~(tap by peers.ames-state)
+    |=  [=ship s=ship-state]
+    ?.  &(?=(%known -.s) =(%pawn (clan:title ship)))  %.n
+    ?&  (gth (sub now ~d180) last-contact.qos.s)
+        ::
+        %-  ~(any by snd.s)
+        |=  m=message-pump-state
+        !=(~ unsent-fragments.m)
+    ==
   ::  +enqueue-alien-todo: helper to enqueue a pending request
   ::
   ::    Also requests key and life from Jael on first request.
@@ -2590,12 +2612,12 @@
               =(~ unsent-fragments.pum)
               =(~ live.packet-pump-state.pum)
           ==
-        ~>  %slog.0^leaf/"ames: bad pump state {<[her.channel i.boz]>}"
+        ~>  %slog.0^leaf/"ames: bad pump state {<her.channel i.boz>}"
         $(boz t.boz)
       ::  no outstanding messages, so send a new %cork
       ::
       ::  TODO use +trace
-      ~>  %slog.0^leaf/"ames: recork {<[her.channel i.boz]>}"
+      ~>  %slog.0^leaf/"ames: recork {<her.channel i.boz>}"
       =/  =plea  [%$ /flow [%cork ~]]
       (on-memo i.boz plea %plea)
     ::  +got-duct: look up $duct by .bone, asserting already bound
@@ -2768,11 +2790,18 @@
           ::
           (emit [/ames]~ %pass wire %b %rest next-wake)
         =/  nax-bone=^bone  (mix 0b10 bone)
+        =?  peer-core  (~(has by snd.peer-state) nax-bone)
+          %.  peer-core
+          %+  trace  odd.veb
+          =/  dat  [her.channel bone=nax-bone message-num=message-num -.task]
+          |.("remove naxplanation flow {<dat>}")
         =.  peer-state
           =,  peer-state
           %_  peer-state
+            ::  preemptively delete nax flows (e.g. nacks for initial %watches)
+            ::
+            snd      (~(del by (~(del by snd) bone)) nax-bone)
             rcv      (~(del by rcv) bone)
-            snd      (~(del by snd) bone)
             corked   (~(put in corked) bone)
             closing  (~(del in closing) bone)
             krocs    (~(del in krocs) bone)
@@ -3196,9 +3225,14 @@
   ++  packet-queue
     %-  (ordered-map live-packet-key live-packet-val)
     lte-packets
+  ::  +live-packets: number of sent packets awaiting ack
+  ::
+  ++  live-packets
+    ^-  @ud
+    ~(wyt by live.state)
   ::  +gauge: inflate a |pump-gauge to track congestion control
   ::
-  ++  gauge  (make-pump-gauge now.channel metrics.state [her bug]:channel)
+  ++  gauge  (make-pump-gauge metrics.state live-packets [now her bug]:channel)
   ::  +work: handle $packet-pump-task request
   ::
   ++  work
@@ -3253,7 +3287,7 @@
         =?  packet-pump  ?=(^ static-fragment)
           %-  %+  trace  snd.veb
               =/  nums  [message-num fragment-num]:u.static-fragment.res
-              |.("dead {<nums^show:gauge>}")
+              |.("dead {<nums show:gauge>}")
           (give %send u.static-fragment.res)
         packet-pump
     ::
@@ -3312,7 +3346,6 @@
     ::  update .live and .metrics
     ::
     =.  live.state     (gas:packet-queue live.state send-list)
-    =.  metrics.state  (on-sent:gauge (lent send-list))
     ::  TMI
     ::
     =>  .(sent `(list static-fragment)`sent)
@@ -3374,7 +3407,7 @@
                     =(0 (mod counter.metrics.state 20))
                 ==
               same
-            (trace snd.veb |.("send: {<[fragment=fragment-num show:gauge]>}"))
+            (trace snd.veb |.("send: {<fragment=fragment-num show:gauge>}"))
         ::  .resends is backward, so fold backward and emit
         ::
         =.  packet-pump
@@ -3398,7 +3431,7 @@
         ==
     ^-  [new-val=(unit live-packet-val) stop=? _acc]
     ::
-    =/  gauge  (make-pump-gauge now.channel metrics.acc [her bug]:channel)
+    =/  gauge  (make-pump-gauge metrics.acc live-packets [now her bug]:channel)
     ::  is this the acked packet?
     ::
     ?:  =(key [message-num fragment-num])
@@ -3433,7 +3466,7 @@
     =-  =.  metrics.state  metrics.-
         =.  live.state     live.-
         ::
-        %-  (trace snd.veb |.("done {<message-num=message-num^show:gauge>}"))
+        %-  (trace snd.veb |.("done {<message-num=message-num show:gauge>}"))
         (fast-resend-after-ack message-num `fragment-num`0)
     ::
     ^+  [metrics=metrics.state live=live.state]
@@ -3445,7 +3478,7 @@
         ==
     ^-  [new-val=(unit live-packet-val) stop=? pump-metrics]
     ::
-    =/  gauge  (make-pump-gauge now.channel metrics [her bug]:channel)
+    =/  gauge  (make-pump-gauge metrics live-packets [now her bug]:channel)
     ::  if we get an out-of-order ack for a message, skip until it
     ::
     ?:  (lth message-num.key message-num)
@@ -3493,9 +3526,10 @@
 ::  +make-pump-gauge: construct |pump-gauge congestion control core
 ::
 ++  make-pump-gauge
-  |=  [now=@da pump-metrics =ship =bug]
+  |=  [pump-metrics live-packets=@ud now=@da =ship =bug]
+  ::  TODO rename live-packets num-live
   =*  veb  veb.bug
-  =*  metrics  +<+<
+  =*  metrics  +<-
   |%
   ++  trace
     |=  [verb=? print=(trap tape)]
@@ -3515,15 +3549,7 @@
   ::
   ++  num-slots
     ^-  @ud
-    (sub-safe cwnd num-live)
-  ::  +on-sent: adjust metrics based on sending .num-sent fresh packets
-  ::
-  ++  on-sent
-    |=  num-sent=@ud
-    ^-  pump-metrics
-    ::
-    =.  num-live  (add num-live num-sent)
-    metrics
+    (sub-safe cwnd live-packets)
   ::  +on-ack: adjust metrics based on a packet getting acknowledged
   ::
   ++  on-ack
@@ -3531,7 +3557,6 @@
     ^-  pump-metrics
     ::
     =.  counter  +(counter)
-    =.  num-live  (dec num-live)
     ::  if below congestion threshold, add 1; else, add avg. 1 / cwnd
     ::
     =.  cwnd
@@ -3571,7 +3596,7 @@
     ::
     =?  cwnd  !in-recovery  (max 2 (div cwnd 2))
     %-  %+  trace  snd.veb
-        |.("skip {<[resend=resend in-recovery=in-recovery show]>}")
+        |.("skip {<resend=resend in-recovery=in-recovery show>}")
     metrics
   ::  +on-timeout: (re)enter slow-start mode on packet loss
   ::
@@ -3597,12 +3622,12 @@
     (lth cwnd ssthresh)
   ::  +in-recovery: %.y iff we're recovering from a skipped packet
   ::
-  ::    We finish recovering when .num-live finally dips back down to
+  ::    We finish recovering when .live-packets finally dips back down to
   ::    .cwnd.
   ::
   ++  in-recovery
     ^-  ?
-    (gth num-live cwnd)
+    (gth live-packets cwnd)
   ::  +sub-safe: subtract with underflow protection
   ::
   ++  sub-safe
@@ -3619,7 +3644,7 @@
         rttvar=(div rttvar ms)
         ssthresh=ssthresh
         cwnd=cwnd
-        num-live=num-live
+        num-live=live-packets
         counter=counter
     ==
   --
@@ -3665,7 +3690,7 @@
     ::
     ?:  (gte seq (add 10 last-acked.state))
       %-  %+  trace  odd.veb
-          |.("future %hear {<seq=seq^last-acked=last-acked.state>}")
+          |.("future %hear {<seq=seq last-acked=last-acked.state>}")
       message-sink
     ::
     =/  is-last-fragment=?  =(+(fragment-num) num-fragments)
@@ -3676,7 +3701,7 @@
         ::  single packet ack
         ::
         %-  %+  trace  rcv.veb
-            |.("send dupe ack {<seq=seq^fragment-num=fragment-num>}")
+            |.("send dupe ack {<seq=seq fragment-num>}")
         (give %send seq %& fragment-num)
       ::  whole message (n)ack
       ::
@@ -3696,8 +3721,8 @@
         %-  %+  trace  rcv.veb
             |.  ^-  tape
             =/  data
-              :*  her.channel  seq=seq  bone=bone
-                  fragment-num=fragment-num  num-fragments=num-fragments
+              :*  her.channel  seq=seq  bone=bone.shut-packet
+                  fragment-num  num-fragments
                   la=last-acked.state  lh=last-heard.state
               ==
             "hear last in-progress {<data>}"
@@ -3706,8 +3731,8 @@
       ::
       %-  %+  trace  rcv.veb  |.
           =/  data
-            :*  seq=seq  fragment-num=fragment-num
-                num-fragments=num-fragments  closing=closing
+            :*  seq=seq  fragment-num
+                num-fragments  closing=closing
             ==
           "send ack-1 {<data>}"
       (give %send seq %& fragment-num)
@@ -3737,7 +3762,7 @@
             "hear last dupe {<data>}"
         message-sink
       %-  %+  trace  rcv.veb
-          |.("send dupe ack {<her.channel^seq=seq^fragment-num=fragment-num>}")
+          |.("send dupe ack {<her.channel seq=seq fragment-num>}")
       (give %send seq %& fragment-num)
     ::  new fragment; store in state and check if message is done
     ::
@@ -3754,7 +3779,7 @@
     =?  message-sink  !is-last-fragment
       %-  %+  trace  rcv.veb  |.
           =/  data
-            [seq=seq fragment-num=fragment-num num-fragments=num-fragments]
+            [seq=seq fragment-num num-fragments]
           "send ack-2 {<data>}"
       (give %send seq %& fragment-num)
     ::  enqueue all completed messages starting at +(last-heard.state)

pkg/arvo/sys/vane/clay.hoon

@@ -432,7 +432,10 @@
           task                                          ::
       ==                                                ::
       $:  %d                                            ::  to %dill
-          $>(%flog task:dill)                           ::
+          $>  $?  %flog                                 ::
+                  %text                                 ::
+              ==                                        ::
+          task:dill                                     ::
       ==                                                ::
       $:  %g                                            ::  to %gall
           $>  $?  %deal
@@ -460,14 +463,12 @@
       ==  ==                                            ::
       $:  %clay                                         ::
           $>  $?  %mere                                 ::
-                  %note                                 ::
                   %writ                                 ::
               ==                                        ::
           gift                                          ::
       ==                                                ::
       $:  %gall
-          $>  $?  %onto
-                  %unto
+          $>  $?  %unto
               ==
           gift:gall
       ==
@@ -2209,7 +2210,8 @@
         |=  [prefix=@tD paths=(set path)]
         %+  turn  ~(tap in paths)
         |=  =path
-        [u.hun %give %note prefix (path-to-tank path)]
+        ^-  move
+        [u.hun %pass /note %d %text prefix ' ' ~(ram re (path-to-tank path))]
       ::
       ++  path-to-tank
         |=  =path
@@ -5774,8 +5776,6 @@
   ?^  dud
     ~|(%clay-take-dud (mean tang.u.dud))
   ?:  ?=([%lu %load *] tea)
-    ?:  ?=(%onto +<.hin)
-      [~ ..^$]
     ?>  ?=(%unto +<.hin)
     ?>  ?=(%poke-ack -.p.hin)
     ?~  p.p.hin
@@ -5950,7 +5950,6 @@
         q.p.p.+.hin
     [~ ..^$]
   ::
-      %note  [[hen %give +.hin]~ ..^$]
       %wake
     ::  TODO: handle behn errors
     ::
@@ -5973,7 +5972,6 @@
       ::
       %boon  !!
       %lost  !!
-      %onto  !!
       %unto  !!
       %writ
     %-  (slog leaf+"clay: strange writ (expected on upgrade to Fusion)" ~)

pkg/arvo/sys/vane/dill.hoon

@@ -8,27 +8,26 @@
 --                                                      ::
 =>  |%                                                  ::  console protocol
 +$  axle                                                ::
-  $:  %4  ::TODO  replace ducts with session ids        ::
+  $:  %6                                                ::
       hey=(unit duct)                                   ::  default duct
-      dug=(map duct axon)                               ::  conversations
-      eye=(jug duct duct)                               ::  outside listeners
+      dug=(map @tas axon)                               ::  conversations
+      eye=(jug @tas duct)                               ::  outside listeners
       lit=?                                             ::  boot in lite mode
       $=  veb                                           ::  vane verbosities
       $~  (~(put by *(map @tas log-level)) %hole %soft) ::  quiet packet crashes
       (map @tas log-level)                              ::
+      egg=_|                                            ::  see +take, removeme
   ==                                                    ::
-+$  axon                                                ::  dill per duct
++$  axon                                                ::  dill session
   $:  ram=term                                          ::  console program
       tem=(unit (list dill-belt))                       ::  pending, reverse
       wid=_80                                           ::  terminal width
-      pos=@ud                                           ::  cursor position
-      see=$%([%lin (list @c)] [%klr stub])              ::  current line
   ==                                                    ::
 +$  log-level  ?(%hush %soft %loud)                     ::  none, line, full
 --  =>                                                  ::
 |%                                                      ::  protocol outward
 +$  mess                                                ::
-  $%  [%dill-belt p=(hypo dill-belt)]                   ::
+  $%  [%dill-poke p=(hypo poke)]                        ::
   ==                                                    ::
 +$  move  [p=duct q=(wind note gift)]                   ::  local move
 +$  note                                                ::  out request $->
@@ -69,7 +68,6 @@
       ==  ==                                            ::
       $:  %clay                                         ::
           $>  $?  %mere                                 ::
-                  %note                                 ::
                   %writ                                 ::
               ==                                        ::
           gift:clay                                     ::
@@ -78,10 +76,7 @@
           $>(%blit gift:dill)                           ::
       ==                                                ::
       $:  %gall                                         ::
-          $>  $?  %onto                                 ::
-                  %unto                                 ::
-              ==                                        ::
-          gift:gall                                     ::
+          $>(%unto gift:gall)                           ::
   ==  ==                                                ::
 ::::::::                                                ::  dill tiles
 --
@@ -91,39 +86,27 @@
     |%
     ++  as                                              ::  per cause
       =|  moz=(list move)
-      |_  [hen=duct axon]
+      |_  [hen=duct ses=@tas axon]
       ++  abet                                          ::  resolve
         ^-  [(list move) axle]
-        [(flop moz) all(dug (~(put by dug.all) hen +<+))]
+        [(flop moz) all(dug (~(put by dug.all) ses +<+>))]
       ::
       ++  call                                          ::  receive input
         |=  kyz=task
         ^+  +>
         ?+    -.kyz  ~&  [%strange-kiss -.kyz]  +>
-            %flow  +>
-            %harm  +>
-            %hail  (send %hey ~)
-            %text  (from %out (tuba p.kyz))
-            %crud  ::  (send `dill-belt`[%cru p.kyz q.kyz])
-                   (crud p.kyz q.kyz)
-            %blew  (send %rez p.p.kyz q.p.kyz)
-            %heft  (pass /whey %$ whey/~)
-            %meld  (dump kyz)
-            %pack  (dump kyz)
-            %crop  (dump trim+p.kyz)
-            %verb  (pass /verb %$ kyz)
-            %noop  +>
-            %belt
-          %-  send
-          ::TMP  forwards compatibility with next-dill
-          ::
-          ?@  p.kyz  [%txt p.kyz ~]
-          ?:  ?=(%hit -.p.kyz)  [%txt ~]
-          ?.  ?=(%mod -.p.kyz)  p.kyz
-          =/  =@c
-            ?@  key.p.kyz  key.p.kyz
-            ?:(?=(?(%bac %del %ret) -.key.p.kyz) `@`-.key.p.kyz ~-)
-          ?:(?=(%met mod.p.kyz) [%met c] [%ctl c])
+          %hail  (send %hey ~)
+          %belt  (send `dill-belt`p.kyz)
+          %talk  (talk p.kyz)
+          %text  (fore (tuba p.kyz) ~)
+          %crud  ::  (send `dill-belt`[%cru p.kyz q.kyz])
+                 (crud p.kyz q.kyz)
+          %blew  (send(wid p.p.kyz) %rez p.p.kyz q.p.kyz)
+          %heft  (pass /whey %$ whey/~)
+          %meld  (dump kyz)
+          %pack  (dump kyz)
+          %crop  (dump trim+p.kyz)
+          %verb  (pass /verb %$ kyz)
         ==
       ::
       ++  crud
@@ -133,30 +116,30 @@
         =/  lev=log-level  (~(gut by veb.all) err %loud)
         ::  apply log level for this error tag
         ::
-        =/  =wall
-          ?-  lev
-            %hush  ~
-            %soft  ~["crud: %{(trip err)} event failed"]
-            %loud  :-  "crud: %{(trip err)} event failed"
-                   %-  zing
-                   %+  turn  (flop tac)
-                   |=(a=tank (~(win re a) [0 wid]))
-          ==
-        |-  ^+  +>.^$
-        ?~  wall  +>.^$
-        $(wall t.wall, +>.^$ (from %out (tuba i.wall)))
+        ?-  lev
+          %hush  +>.$
+          %soft  (fore (tuba "crud: %{(trip err)} event failed") ~)
+          %loud  (talk leaf+"crud: %{(trip err)} event failed" (flop tac))
+        ==
+      ::
+      ++  talk
+        |=  tac=(list tank)
+        %-  fore
+        %-  zing
+        %+  turn  tac
+        |=  a=tank
+        (turn (~(win re a) [0 wid]) tuba)
       ::
       ++  dump                                          ::  pass down to hey
         |=  git=gift
         ?>  ?=(^ hey.all)
         +>(moz [[u.hey.all %give git] moz])
       ::
-      ++  done                                          ::  return gift
+      ++  done                                          ::  gift to viewers
         |=  git=gift
         =-  +>.$(moz (weld - moz))
         %+  turn
-          :-  hen
-          ~(tap in (~(get ju eye.all) hen))
+          ~(tap in (~(get ju eye.all) ses))
         |=(=duct [duct %give git])
       ::
       ++  deal                                          ::  pass to %gall
@@ -167,44 +150,37 @@
         |=  [=wire =note]
         +>(moz :_(moz [hen %pass wire note]))
       ::
+      ++  fore                                          ::  send dill output
+        ::NOTE  there are still implicit assumptions
+        ::      about the underlying console app's
+        ::      semantics here. specifically, trailing
+        ::      newlines are important to not getting
+        ::      overwritten by the drum prompt, and a
+        ::      bottom-of-screen cursor position gives
+        ::      nicest results. a more agnostic solution
+        ::      will need to replace this arm, someday.
+        ::      perhaps +send this to .ram instead?
+        ::
+        |=  liz=(list (list @c))
+        ~?  !=(%$ ses)  [%d %foreing-in-session ses]
+        ^+  +>
+        =.  +>
+          =|  biz=(list blit)
+          |-  ^+  +>.^$
+          ?~  liz  (done %blit [%hop 0] [%wyp ~] biz)
+          $(liz t.liz, biz (welp biz [%put i.liz] [%nel ~] ~))
+        ::  since dill is acting on its own accord,
+        ::  we %hey the term app so it may clean up.
+        ::
+        (send %hey ~)
+      ::
       ++  from                                          ::  receive blit
         |=  bit=dill-blit
         ^+  +>
-        ?:  ?=(%mor -.bit)
-          |-  ^+  +>.^$
-          ?~  p.bit  +>.^$
-          $(p.bit t.p.bit, +>.^$ ^$(bit i.p.bit))
-        ?:  ?=(%out -.bit)
-          %+  done  %blit
-          :~  [%lin p.bit]
-              [%mor ~]
-              see
-              [%hop pos]
-          ==
-        ?:  ?=(%klr -.bit)
-          %+  done  %blit
-          :~  [%klr p.bit]
-              [%mor ~]
-              see
-              [%hop pos]
-          ==
-        ?:  ?=(%pro -.bit)
-          =.  see  [%lin p.bit]
-          (done %blit [see [%hop pos] ~])
-        ?:  ?=(%pom -.bit)
-          ::NOTE  treat "styled prompt" without style as plain prompt,
-          ::      to allow rendering by older runtimes
-          ::TODO  remove me once v0.10.9+ has high/guaranteed adoption
-          ::
-          ?:  (levy p.bit (cork head |*(s=stye =(*stye s))))
-            $(bit [%pro (zing (turn p.bit tail))])
-          =.  see  [%klr p.bit]
-          (done %blit [see [%hop pos] ~])
-        ?:  ?=(%hop -.bit)
-          (done(pos p.bit) %blit [bit ~])
         ?:  ?=(%qit -.bit)
           (dump %logo ~)
-        (done %blit [bit ~])
+        ::TODO  so why is this a (list blit) again?
+        (done %blit bit ~)
       ::
       ++  sponsor
         ^-  ship
@@ -221,7 +197,7 @@
         =.  tem  ~
         =.  ..mere  (pass /zest %c %zest %base %live)
         =.  ..mere  (show-desk %kids)
-        =.  ..mere  drum-watch
+        =.  ..mere  (open ~)
         |-  ^+  ..mere
         ?~  myt  ..mere
         $(myt t.myt, ..mere (send i.myt))
@@ -231,15 +207,27 @@
         =.  tem  `(turn gyl |=(a=gill [%yow a]))
         (pass / [%c %warp our %base `[%sing %y [%ud 1] /]])
       ::
+      ++  open
+        |=  gyl=(list gill)
+        ::TODO  should allow handlers from non-base desks
+        ::TODO  maybe ensure :ram is running?
+        =.  +>  peer
+        %+  roll  gyl
+        |=  [g=gill _..open]
+        (send [%yow g])
+      ::
       ++  send                                          ::  send action
         |=  bet=dill-belt
         ^+  +>
         ?^  tem
           +>(tem `[bet u.tem])
-        (deal / [%poke [%dill-belt -:!>(bet) bet]])
+        (deal /send/[ses] [%poke [%dill-poke !>([ses bet])]])
       ::
-      ++  drum-watch
-        (deal / [%watch /drum])
+      ++  peer
+        (deal /peer/[ses] %watch /dill/[ses])
+      ::
+      ++  pull
+        (deal /peer/[ses] %leave ~)
       ::
       ++  show-desk                                     ::  permit reads on desk
         |=  des=desk
@@ -249,21 +237,11 @@
         |=  [tea=wire sih=sign]
         ^+  +>
         ?-    sih
-            [%gall %onto *]
-          ::  NOTE effects during initial boot sequence are ignored,
-          ::  so :hood compilation errors will not print; slog if desired
-          ::
-          ::  ~&  [%take-gall-onto +>.sih]
-          ?-  -.+>.sih
-            %|  (crud %onto p.p.+>.sih)
-            %&  (done %blit [%lin (tuba "{<p.p.sih>}")]~)
-          ==
-        ::
             [%gall %unto *]
           ::  ~&  [%take-gall-unto +>.sih]
           ?-    -.+>.sih
               %raw-fact   !!
-              %kick       drum-watch
+              %kick       peer
               %poke-ack   ?~(p.p.+>.sih +>.$ (crud %coup u.p.p.+>.sih))
               %watch-ack
             ?~  p.p.+>.sih
@@ -275,9 +253,6 @@
               +>.$
             (from ;;(dill-blit q.q.cage.p.+>.sih))
           ==
-        ::
-            [%clay %note *]
-          (from %out (tuba p.sih ' ' ~(ram re q.sih)))
         ::
             [?(%behn %clay) %writ *]
           init
@@ -292,12 +267,20 @@
         ==
       --
     ::
-    ++  ax                                              ::  make ++as
-      |=  hen=duct
+    ++  ax                                              ::  make ++as from name
+      |=  [hen=duct ses=@tas]
       ^-  (unit _as)
-      =/  nux  (~(get by dug.all) hen)
+      =/  nux  (~(get by dug.all) ses)
       ?~  nux  ~
-      (some ~(. as hen u.nux))
+      (some ~(. as hen ses u.nux))
+    ::
+    ++  aw                                              ::  make ++as from wire
+      |=  [hen=duct wir=wire]
+      ^-  (unit _as)
+      %+  ax  hen
+      ?+  wir  %$
+        [?(%peer %send) @ *]  i.t.wir
+      ==
     --
 |%                                                      ::  poke+peek pattern
 ++  call                                                ::  handle request
@@ -308,7 +291,10 @@
   ^+  [*(list move) ..^$]
   ~|  wrapped-task
   =/  task=task  ((harden task) wrapped-task)
+  ::  unwrap session tasks, default to session %$
   ::
+  =^  ses=@tas  task
+    ?:(?=(%shot -.task) +.task [%$ task])
   ::  error notifications "downcast" to %crud
   ::
   =?  task  ?=(^ dud)
@@ -338,10 +324,11 @@
     ::
     =*  duc  (need hey.all)
     =/  app  %hood
-    =/  see  (tuba "<awaiting {(trip app)}, this may take a minute>")
-    =/  zon=axon  [app input=[~ ~] width=80 cursor=(lent see) lin+see]
+    =/  say  (tuba "<awaiting {(trip app)}, this may take a minute>")
+    =/  zon=axon  [app input=[~ ~] width=80]
     ::
-    =^  moz  all  abet:(~(into as duc zon) ~)
+    =^  moz  all  abet:(~(into as duc %$ zon) ~)
+    =.  eye.all   (~(put ju eye.all) %$ duc)
     [moz ..^$]
   ::  %flog tasks are unwrapped and sent back to us on our default duct
   ::
@@ -362,35 +349,60 @@
   ?:  ?=(%knob -.task)
     =.  veb.all  (~(put by veb.all) tag.task level.task)
     [~ ..^$]
+  ::  %open opens a new dill session
+  ::
+  ?:  ?=(%open -.task)
+    ?:  (~(has by dug.all) ses)
+      ::TODO  should we allow, and just send the %yow blits?
+      ~|  [%cannot-open-existing ses]
+      !!
+    =/  zon=axon  [p.task ~ width=80]
+    =^  moz  all  abet:(~(open as hen ses zon) q.task)
+    =.  eye.all  (~(put ju eye.all) ses hen)
+    [moz ..^$]
+  ::  %shut closes an existing dill session
+  ::
+  ?:  ?=(%shut -.task)
+    ?:  =(%$ ses)
+      ~|  %cannot-shut-default-session
+      !!
+    =/  nus
+      ~|  [%no-session ses]
+      (need (ax hen ses))
+    ::NOTE  we do deletion from state outside of the core,
+    ::      because +abet would re-insert.
+    ::TODO  send a %bye blit? xx
+    =^  moz  all  abet:pull:nus
+    =.  dug.all   (~(del by dug.all) ses)
+    =.  eye.all   (~(del by eye.all) ses)
+    [moz ..^$]
+  ::  %view opens a subscription to the target session, on the current duct
   ::
   ?:  ?=(%view -.task)
-    ::  crash on viewing non-existent session
+    =/  nus
+      ::  crash on viewing non-existent session
+      ::
+      ~|  [%no-session ses]
+      (need (ax hen ses))
+    ::  register the viewer and send a %hey so they get the full screen
     ::
-    ~|  [%no-session session.task]
-    ?>  =(~ session.task)
-    =/  session  (need hey.all)
-    =/  =axon    (~(got by dug.all) session)
-    ::  register the viewer and send them the prompt line
-    ::
-    :-  [hen %give %blit [see.axon]~]~
-    ..^$(eye.all (~(put ju eye.all) session hen))
+    =^  moz  all
+      abet:(send:nus %hey ~)
+    :-  moz
+    ..^$(eye.all (~(put ju eye.all) ses hen))
+  ::  %flee closes a subscription to the target session, from the current duct
   ::
   ?:  ?=(%flee -.task)
     :-  ~
-    ~|  [%no-session session.task]
-    ?>  =(~ session.task)
-    =/  session  (need hey.all)
-    ..^$(eye.all (~(del ju eye.all) session hen))
+    ..^$(eye.all (~(del ju eye.all) ses hen))
   ::
-  =/  nus  (ax hen)
-  =?  nus  &(?=(~ nus) ?=(^ hey.all))
-    ::TODO  allow specifying target session in task
-    (ax u.hey.all)
+  =/  nus
+    (ax hen ses)
   ?~  nus
-    ::  :hen is an unrecognized duct
+    ::  session :ses does not exist
     ::  could be before %boot (or %boot failed)
     ::
-    ~&  [%dill-call-no-flow hen -.task]
+    ~&  [%dill-call-no-session ses hen -.task]
     =/  tan  ?:(?=(%crud -.task) q.task ~)
     [((slog (flop tan)) ~) ..^$]
   ::
@@ -398,8 +410,79 @@
   [moz ..^$]
 ::
 ++  load                                                ::  import old state
-  |=  old=axle
-  ..^$(all old)
+  =<  |=  old=any-axle
+      ?-  -.old
+        %6  ..^$(all old)
+        %5  $(old (axle-5-to-6 old))
+        %4  $(old (axle-4-to-5 old))
+      ==
+  |%
+  +$  any-axle  $%(axle axle-5 axle-4)
+  ::
+  +$  axle-5
+    $:  %5
+        hey=(unit duct)                                   ::  default duct
+        dug=(map @tas axon)                               ::  conversations
+        eye=(jug @tas duct)                               ::  outside listeners
+        lit=?                                             ::  boot in lite mode
+        veb=(map @tas log-level)
+    ==
+  ::
+  ++  axle-5-to-6
+    |=  a=axle-5
+    ^-  axle
+    :: [%6 hey `(map @tas axon)`dug eye lit veb |]
+    a(- %6, veb [veb.a &])
+  ::
+  +$  axle-4
+    $:  %4
+        hey=(unit duct)
+        dug=(map duct axon-4)
+        eye=(jug duct duct)
+        lit=?
+        veb=(map @tas log-level)
+    ==
+  ::
+  +$  axon-4
+    $:  ram=term
+        tem=(unit (list dill-belt-4))
+        wid=_80
+        pos=$@(@ud [@ud @ud])
+        see=$%([%lin (list @c)] [%klr stub])
+    ==
+  ::
+  +$  dill-belt-4
+    $%  [%ctl p=@c]
+        [%met p=@c]
+        dill-belt
+    ==
+  ::
+  ++  axle-4-to-5
+    |=  axle-4
+    ^-  axle-5
+    :-  %5
+    =-  [hey nug nay lit veb]
+    %+  roll  ~(tap by dug)
+    |=  [[=duct =axon-4] nug=(map @tas axon) nay=(jug @tas duct)]
+    =/  ses=@tas
+      ~|  [%unexpected-duct duct]
+      ?>(=([//term/1]~ duct) %$)
+    :-  (~(put by nug) ses (axon-4-to-5 axon-4))
+    %+  ~(put by nay)  ses
+    (~(put in (~(get ju eye) duct)) duct)
+  ::
+  ++  axon-4-to-5
+    |=  axon-4
+    ^-  axon
+    =;  tem  [ram tem wid]
+    ?~  tem  ~
+    %-  some
+    %+  turn  u.tem
+    |=  b=dill-belt-4
+    ^-  dill-belt
+    ?.  ?=(?(%ctl %met) -.b)  b
+    [%mod -.b p.b]
+  --
 ::
 ++  scry
   ^-  roon
@@ -428,19 +511,12 @@
           =(%$ syd)
       ==
     ~
-  ::  /dx/sessions//line    blit    current line (prompt) of default session
-  ::  /dx/sessions//cursor  @ud     current cursor position of default session
-  ::TODO  support asking for specific sessions once session ids are real
+  ::  /dy/sessions        (set @tas)    all existing sessions
+  ::  /du/sessions/[ses]  ?             does session ses exist?
   ::
-  ?.  ?=(%x ren)  ~
-  ?+  tyl  ~
-      [%sessions %$ *]
-    ?~  hey.all                                [~ ~]
-    ?~  session=(~(get by dug.all) u.hey.all)  [~ ~]
-    ?+  t.t.tyl  ~
-      [%line ~]    ``blit+!>(`blit`see.u.session)
-      [%cursor ~]  ``atom+!>(pos.u.session)
-    ==
+  ?+  [ren tyl]  ~
+    [%y %sessions ~]    ``noun+!>(~(key by dug.all))
+    [%u %sessions @ ~]  ``noun+!>((~(has by dug.all) (snag 1 tyl)))
   ==
 ::
 ++  stay  all
@@ -451,12 +527,27 @@
   ?^  dud
     ~|(%dill-take-dud (mean tang.u.dud))
   ::
-  =/  nus  (ax hen)
+  =;  [moz=(list move) lax=_..^$]
+    =?  moz  egg.all.lax
+      ::  dill pre-release (version %5) in some cases ended up in a state
+      ::  where it had both an old-style and new-style subscription open
+      ::  for the default session. here, we obliterate both and establish
+      ::  only the new-style subscription.
+      ::
+      =/  hey  (need hey.all.lax)
+      :*  [hey %pass / %g %deal [our our] %hood %leave ~]
+          [hey %pass [%peer %$ ~] %g %deal [our our] %hood %leave ~]
+          [hey %pass [%peer %$ ~] %g %deal [our our] %hood %watch [%dill %$ ~]]
+          moz
+      ==
+    =.  egg.all.lax  |
+    [moz lax]
+  ::
+  =/  nus  (aw hen tea)
   ?~  nus
-    ::  :hen is an unrecognized duct
-    ::  could be before %boot (or %boot failed)
+    ::  :tea points to an unrecognized session
     ::
-    ~&  [%dill-take-no-flow hen -.hin +<.hin]
+    ~&  [%dill-take-no-session tea -.hin +<.hin]
     [~ ..^$]
   =^  moz  all  abet:(take:u.nus tea hin)
   [moz ..^$]

pkg/arvo/sys/vane/gall.hoon

@@ -198,11 +198,21 @@
   ::  +mo-abet: finalize, reversing moves
   ::  +mo-pass: prepend a standard %pass to the current list of moves
   ::  +mo-give: prepend a standard %give to the current list of moves
+  ::  +mo-talk: build task to print config report or failure trace
   ::
   ++  mo-core  .
   ++  mo-abed  |=(hun=duct mo-core(hen hun))
   ++  mo-abet  [(flop moves) gall-payload]
   ++  mo-give  |=(g=gift mo-core(moves [[hen give+g] moves]))
+  ++  mo-talk
+    |=  rup=(each suss tang)
+    ^-  [wire note-arvo]
+    :+  /sys/say  %d
+    ^-  task:dill
+    ?-  -.rup
+      %&  [%text "gall: {(t q)}ed %{(t p)}":[t=trip p.rup]]
+      %|  [%talk leaf+"gall: failed" (flop p.rup)]
+    ==
   ++  mo-pass  |=(p=[wire note-arvo] mo-core(moves [[hen pass+p] moves]))
   ++  mo-slip  |=(p=note-arvo mo-core(moves [[hen slip+p] moves]))
   ++  mo-past
@@ -303,12 +313,12 @@
     =/  ap-core  +.wag
     ?^  maybe-tang
       =.  mo-core  old
-      (mo-give %onto %.n u.maybe-tang)
+      (mo-pass (mo-talk %.n u.maybe-tang))
     ::
     =.  mo-core  ap-abet:ap-core
     =.  mo-core  (mo-clear-queue dap)
     =/  =suss  [dap %boot now]
-    (mo-give %onto [%.y suss])
+    (mo-pass (mo-talk %.y suss))
   ::  +mo-send-foreign-request: handle local request to .ship
   ::
   ++  mo-send-foreign-request
@@ -523,6 +533,11 @@
         ?~  error=error.sign-arvo
           ~
         `[[%leaf (trip tag.u.error)] tang.u.error]
+      ::  send a %cork if we get a nack upon initial subscription
+      ::
+      =?  mo-core
+          &(?=(^ err) |(?=(%watch-as remote-request) ?=(%watch remote-request)))
+        (mo-pass [%sys wire] %a %cork ship)
       ::
       ?-  remote-request
         %watch-as  (mo-give %unto %watch-ack err)
@@ -899,8 +914,8 @@
       ::
       =/  running  (~(put by yokes.state) agent-name yoke)
       =/  moves
-        =/  giver  |=(report=(each suss tang) [hen %give %onto report])
-        =/  from-suss  (turn agent-config giver)
+        =/  talker  |=(report=(each suss tang) [hen %pass (mo-talk report)])
+        =/  from-suss  (turn agent-config talker)
         :(weld agent-moves from-suss moves)
       ::
       %_  mo-core

pkg/arvo/sys/vane/jael.hoon

@@ -105,11 +105,8 @@
           $>(%wake gift:behn)                           ::
       ==                                                ::
       $:  %gall                                         ::
-          $>  $?  %onto                                 ::
-                  %unto                                 ::
-              ==                                        ::
-          gift:gall                                ::
-      ==
+          $>(%unto gift:gall)                           ::
+      ==                                                ::
   ==                                                    ::
 --  ::
 ::                                                      ::::
@@ -462,12 +459,12 @@
     ::    [%vega ~]
     ::
         %vega
-      +>.$::
+      +>.$
+    ::
     ::  in response to memory pressure
     ::    [%trim p=@ud]
     ::
         %trim
-      ::TODO  consider %ruin-ing long-offline comets
       +>.$
     ::
     ::  watch private keys
@@ -507,7 +504,7 @@
         %ruin
       ::NOTE  we blast this out to _all_ known ducts, because the common
       ::      use case for this is comets, about who nobody cares.
-      =/  dus  ~(key by yen.zim.pki)
+      =/  dus  (~(uni in nel.zim.pki) ~(key by yen.zim.pki))
       =/  sus  ~(. su hen now pki etn)
       =/  sis  ~(tap in ships.tac)
       |-
@@ -550,10 +547,6 @@
       =/  ships  (~(get ju ship-sources-reverse.etn) source-id)
       %-  curd  =<  abet
       (sources:~(feel su hen now pki etn) ships source)
-    ::
-        [%gall %onto *]
-      ~&  [%jael-onto tea hin]
-      +>.$
     ::
         [%gall %unto *]
       ?-    +>-.hin
@@ -736,12 +729,10 @@
   ++  subscribers-on-ship
     |=  =ship
     ^-  (set duct)
-    =/  specific-subs  (~(get ju ney.zim) ship)
-    =/  general-subs=(set duct)
-      ?:  ?=(?(%czar %king %duke) (clan:title ship))
-        nel.zim
-      ~
-    (~(uni in specific-subs) general-subs)
+    ::  union of general and ship-specific subs
+    ::
+    %-  ~(uni in nel.zim)
+    (~(get ju ney.zim) ship)
   ::
   ++  feed
     |_  ::  hen: subscription source
@@ -997,7 +988,7 @@
 =|  lex=state-2
 |=  $:  ::  now: current time
         ::  eny: unique entropy
-        ::  ski: namespace resolver
+        ::  rof: namespace resolver
         ::
         now=@da
         eny=@uvJ

pkg/arvo/sys/zuse.hoon

@@ -4,7 +4,7 @@
 =>  ..lull
 ~%  %zuse  ..part  ~
 |%
-++  zuse  %417
+++  zuse  %416
 ::                                                      ::  ::
 ::::                                                    ::  ::  (2) engines
   ::                                                    ::  ::
@@ -3843,6 +3843,102 @@
         ~
       (some (~(run by lum) need))
     --  ::dejs-soft
+  ::
+  ++  klr                                               ::  styx/stub engine
+    =,  dill
+    |%
+    ++  make                                            ::  stub from styx
+      |=  a=styx  ^-  stub
+      =|  b=stye
+      %+  reel
+        |-  ^-  stub
+        %-  zing  %+  turn  a
+        |=  a=$@(@t (pair styl styx))
+        ?@  a  [b (tuba (trip a))]~
+        ^$(a q.a, b (styd p.a b))
+      ::
+      |=  [a=(pair stye (list @c)) b=stub]
+      ?~  b  [a ~]
+      ?.  =(p.a p.i.b)  [a b]
+      [[p.a (weld q.a q.i.b)] t.b]
+    ::
+    ++  styd                                            ::  stye from styl
+      |=  [a=styl b=stye]  ^+  b                        ::  with inheritance
+      :+  ?~  p.a  p.b
+          ?~  u.p.a  ~
+          (~(put in p.b) u.p.a)
+        (fall p.q.a p.q.b)
+      (fall q.q.a q.q.b)
+    ::
+    ++  lent-char
+      |=  a=stub  ^-  @
+      (roll (lnts-char a) add)
+    ::
+    ++  lnts-char                                       ::  stub text lengths
+      |=  a=stub  ^-  (list @)
+      %+  turn  a
+      |=  a=(pair stye (list @c))
+      (lent q.a)
+    ::
+    ++  brek                                            ::  index + incl-len of
+      |=  [a=@ b=(list @)]                              ::  stub pair w/ idx a
+      =|  [c=@ i=@]
+      |-  ^-  (unit (pair @ @))
+      ?~  b  ~
+      =.  c  (add c i.b)
+      ?:  (gte c a)
+        `[i c]
+      $(i +(i), b t.b)
+    ::
+    ++  pact                                            ::  condense stub
+      |=  a=stub
+      ^-  stub
+      ?~  a  ~
+      ?~  t.a  a
+      ?.  =(p.i.a p.i.t.a)  [i.a $(a t.a)]
+      =.  q.i.t.a  (weld q.i.a q.i.t.a)
+      $(a t.a)
+    ::
+    ++  slag                                            ::  slag stub
+      |=  [a=@ b=stub]
+      ^-  stub
+      ?:  =(0 a)  b
+      ?~  b  ~
+      =+  c=(lent q.i.b)
+      ?:  =(c a)  t.b
+      ?:  (gth c a)
+        [[p.i.b (^slag a q.i.b)] t.b]
+      $(a (sub a c), b t.b)
+    ::
+    ++  scag                                            ::  scag stub
+      |=  [a=@ b=stub]
+      ^-  stub
+      ?:  =(0 a)  ~
+      ?~  b  ~
+      =+  c=(lent q.i.b)
+      ?:  (gth c a)
+        [p.i.b (^scag a q.i.b)]~
+      :-  i.b
+      $(a (sub a c), b t.b)
+    ::
+    ++  swag                                            ::  swag stub
+      |=  [[a=@ b=@] c=stub]
+      (scag b (slag a c))
+    ::
+    ++  wail                                            ::  overlay stub
+      |=  [a=stub b=@ c=stub d=@c]
+      ^-  stub
+      ;:  weld
+        (scag b a)
+      ::
+        =+  e=(lent-char a)
+        ?:  (lte b e)  ~
+        [*stye (reap (sub b e) d)]~
+      ::
+        c
+        (slag (add b (lent-char c)) a)
+      ==
+    --  ::  klr
   --
 ::  |cloy: clay helpers
 ::
@@ -4928,7 +5024,7 @@
         =<  q.q  %-  need  %-  need
         (rof ~ %j `beam`[[our %sein %da now] /(scot %p who)])
       --
-  ::  middle core: for userspace use, with .^
+  ::  middle core: stateless queries for default numeric sponsorship
   ::
   =>  |%
       ::                                                ::  ++clan:title
@@ -4968,7 +5064,7 @@
           %pawn  (end 4 who)
         ==
       --
-  ::  surface core: stateless queries for default numeric sponsorship
+  ::  surface core: for userspace use, with .^
   ::
   |%
   ::                                                    ::  ++cite:title
@@ -5003,13 +5099,25 @@
         %j
         /(scot %p our)/sein/(scot %da now)/(scot %p who)
     ==
+  ::  +team was created with two meanings:
+  ::    A. her / her moon
+  ::    B. whoever should be able to control her ship
+  ::
+  ::  these two things aren't obviously equal anymore,
+  ::  and it's more important for +team to satisfy B than A,
+  ::  so now +team just means "her".
+  ::
+  ::  (ships can definitely be trusted to control themselves)
   ::                                                    ::  ++team:title
-  ++  team                                              ::  our / our moon
-    |=  [our=ship who=ship]
+  ++  team                                              ::  her
+    |=  [her=ship who=ship]
     ^-  ?
-    ?|  =(our who)
-        &(?=(%earl (clan who)) =(our (^sein who)))
-    ==
+    =(her who)
+  ::                                                    ::  ++moon:title
+  ++  moon                                              ::  her moon
+    |=  [her=ship who=ship]
+    ^-  ?
+    &(=(%earl (clan who)) =(her (^sein who)))
   --  ::title
 ::                                                      ::
 ::::                      ++milly                       ::  (2k) milliseconds

pkg/arvo/ted/aqua/dill.hoon

@@ -17,15 +17,16 @@
     %+  roll  blits
     |=  [b=blit:dill line=tape]
     ?-    -.b
-        %lin  (tape p.b)
+        %put  (tape p.b)
         %klr  (tape (zing (turn p.b tail)))
-        %mor  ~&  "{<who>}: {line}"  ""
+        %nel  ~&  "{<who>}: {line}"  ""
         %hop  line
         %bel  line
         %clr  ""
         %sag  ~&  [%save-jamfile-to p.b]  line
         %sav  ~&  [%save-file-to p.b]  line
         %url  ~&  [%activate-url p.b]  line
+        %wyp  ""
     ==
   ~?  !=(~ last-line)  last-line
   ~

pkg/base-dev/lib/bitcoin-utils.hoon

@@ -143,6 +143,7 @@
     |=  a=@
     ^-  hexb
     =/  l=@  (met 3 a)
+    ?:  =(l 0)  1^a
     ?:  =(l 1)  1^a
     ?:  =(l 2)  (cat:byt ~[1^0xfd (flip:byt 2^a)])
     ?:  (lte l 4)  (cat:byt ~[1^0xfe (flip:byt 4^a)])
@@ -162,7 +163,7 @@
       %0xfe  2
       %0xff  3
     ==
-    :_  (drop:byt (add 1 len) h)
+    :_  (drop:byt (add 1 (bex len)) h)
     %-  flip:byt
     (take:byt (bex len) (drop:byt 1 h))
   ::  +dea: atom instead of hexb for parsed CompactSize

pkg/base-dev/lib/dill.hoon

@@ -0,0 +1,94 @@
+::  dill: utilities for dill's data structures
+::
+=,  dill
+|%
+++  enjs
+  |%
+  ++  blit
+    |=  =blit:dill
+    ^-  json
+    =,  enjs:format
+    %+  frond  -.blit
+    ?-  -.blit
+      %bel  b+&
+      %clr  b+&
+      %hop  ?@  p.blit  (numb p.blit)
+            (pairs 'x'^(numb x.p.blit) 'y'^(numb y.p.blit) ~)
+      %put  a+(turn p.blit |=(c=@c s+(tuft c)))
+      %nel  b+&
+      %url  s+p.blit
+      %wyp  b+&
+      %mor  a+(turn p.blit ^blit)
+    ::
+        %sag
+      %-  pairs
+      :~  'path'^(path p.blit)
+          'file'^s+(en:base64:mimes:html (as-octs:mimes:html (jam q.blit)))
+      ==
+    ::
+        %sav
+      %-  pairs
+      :~  'path'^(path p.blit)
+          'file'^s+(en:base64:mimes:html (as-octs:mimes:html q.blit))
+      ==
+    ::
+        %klr
+      :-  %a
+      %+  turn  p.blit
+      |=  [=stye text=(list @c)]
+      %-  pairs
+      :~  'text'^a+(turn text |=(c=@c s+(tuft c)))
+        ::
+          :-  'stye'
+          %-  pairs
+          |^  :~  'back'^(color p.q.stye)
+                  'fore'^(color q.q.stye)
+                  'deco'^a+(turn ~(tap in p.stye) |=(d=deco ?~(d ~ s+d)))
+              ==
+          ++  color
+            |=  =tint
+            ?@  tint  ?~(tint ~ s+tint)
+            =,  tint
+            (pairs r+(numb r) g+(numb g) b+(numb b) ~)
+          --
+      ==
+    ==
+  --
+::
+++  dejs
+  |%
+  ++  belt
+    |=  jon=json
+    ^-  belt:dill
+    ?:  ?=([%s *] jon)
+      (taft p.jon)
+    =,  dejs:format
+    %.  jon
+    %-  of
+    |^  :*  mod+(ot 'mod'^mod 'key'^bot ~)
+            txt+(ar (cu taft so))
+            bol
+        ==
+    ::
+    ++  bol
+      :~  aro+(su (perk %d %l %r %u ~))
+          bac+ul
+          del+ul
+          hit+(ot 'x'^ni 'y'^ni ~)
+          ret+ul
+      ==
+    ::
+    ++  bot
+      |=  j=json
+      ^-  bolt:dill
+      ?+  j  !!
+        [%s *]  (taft p.j)
+        [%o *]  ((of bol) j)
+      ==
+    ::
+    ++  mod
+      |=  j=json
+      ((su (perk %ctl %met %hyp ~)) j)
+    --
+  --
+--

pkg/base-dev/lib/language-server/complete.hoon

@@ -3,7 +3,8 @@
 ::
 =/  debug  |
 |%
-+*  option  [item]
+++  option
+  |$  [item]
   [term=cord detail=item]
 ::
 ::  Like +rose except also produces line number

pkg/base-dev/lib/ph/util.hoon

@@ -28,8 +28,8 @@
   %+  send-events-to  who
   ^-  (list unix-event)
   :~
-    [/d/term/1 %belt %ctl `@c`%e]
-    [/d/term/1 %belt %ctl `@c`%u]
+    [/d/term/1 %belt %mod %ctl `@c`%e]
+    [/d/term/1 %belt %mod %ctl `@c`%u]
     [/d/term/1 %belt %txt ((list @c) what)]
     [/d/term/1 %belt %ret ~]
   ==
@@ -40,7 +40,7 @@
   |=  [who=ship what=term]
   ^-  (list ph-event)
   %+  send-events-to  who
-  :~  [/d/term/1 %belt %ctl (,@c what)]
+  :~  [/d/term/1 %belt %mod %ctl (,@c what)]
   ==
 ::
 ::  Inject a file into a ship
@@ -67,7 +67,7 @@
     ::
       %+  lien  p.q.uf
       |=  =blit:dill
-      ?.  ?=(%lin -.blit)
+      ?.  ?=(%put -.blit)
         |
       !=(~ (find what p.blit))
   ==

pkg/base-dev/lib/shoe.hoon

@@ -13,15 +13,15 @@
 /-  *sole
 /+  sole, auto=language-server-complete
 |%
-+$  state-0
-  $:  %0
-      soles=(map @ta sole-share)
++$  state-1
+  $:  %1
+      soles=(map sole-id sole-share)
   ==
 ::  $card: standard gall cards plus shoe effects
 ::
 +$  card
   $%  card:agent:gall
-      [%shoe sole-ids=(list @ta) effect=shoe-effect]  ::  ~ sends to all soles
+      [%shoe sole-ids=(list sole-id) effect=shoe-effect]  ::  ~ sends to all
   ==
 ::  $shoe-effect: easier sole-effects
 ::
@@ -47,30 +47,30 @@
   ::    if the head of the result is true, instantly run the command
   ::
   ++  command-parser
-    |~  sole-id=@ta
+    |~  =sole-id
     |~(nail *(like [? command-type]))
   ::  +tab-list: autocomplete options for the session (to match +command-parser)
   ::
   ++  tab-list
-    |~  sole-id=@ta
+    |~  =sole-id
     ::  (list [@t tank])
     *(list (option:auto tank))
   ::  +on-command: called when a valid command is run
   ::
   ++  on-command
-    |~  [sole-id=@ta command=command-type]
+    |~  [=sole-id command=command-type]
     *(quip card _^|(..on-init))
   ::
   ++  can-connect
-    |~  sole-id=@ta
+    |~  =sole-id
     *?
   ::
   ++  on-connect
-    |~  sole-id=@ta
+    |~  =sole-id
     *(quip card _^|(..on-init))
   ::
   ++  on-disconnect
-    |~  sole-id=@ta
+    |~  =sole-id
     *(quip card _^|(..on-init))
   ::
   ::NOTE  standard gall agent arms below, though they may produce %shoe cards
@@ -119,27 +119,27 @@
   |*  [shoe=* command-type=mold]
   |_  =bowl:gall
   ++  command-parser
-    |=  sole-id=@ta
+    |=  =sole-id
     (easy *[? command-type])
   ::
   ++  tab-list
-    |=  sole-id=@ta
+    |=  =sole-id
     ~
   ::
   ++  on-command
-    |=  [sole-id=@ta command=command-type]
+    |=  [=sole-id command=command-type]
     [~ shoe]
   ::
   ++  can-connect
-    |=  sole-id=@ta
+    |=  =sole-id
     (team:title [our src]:bowl)
   ::
   ++  on-connect
-    |=  sole-id=@ta
+    |=  =sole-id
     [~ shoe]
   ::
   ++  on-disconnect
-    |=  sole-id=@ta
+    |=  =sole-id
     [~ shoe]
   --
 ::  +agent: creates wrapper core that handles sole events and calls shoe arms
@@ -147,7 +147,7 @@
 ++  agent
   |*  command-type=mold
   |=  =(shoe command-type)
-  =|  state-0
+  =|  state-1
   =*  state  -
   ^-  agent:gall
   =>
@@ -164,8 +164,7 @@
         %+  turn
           ?^  sole-ids.card  sole-ids.card
           ~(tap in ~(key by soles))
-        |=  sole-id=@ta
-        /sole/[sole-id]
+        id-to-path:sole
       ::
           %table
         =;  fez=(list sole-effect)
@@ -202,9 +201,36 @@
     ?.  ?=([%shoe-app ^] q.old-state)
       =^  cards  shoe  (on-load:og old-state)
       [(deal cards) this]
-    =^  old-inner  state  +:!<([%shoe-app vase state-0] old-state)
-    =^  cards      shoe   (on-load:og old-inner)
-    [(deal cards) this]
+    |^  =|  old-outer=state-any
+        =^  old-inner  old-outer
+          +:!<([%shoe-app vase state-any] old-state)
+          :: ~!  q.old-state
+          :: ?+  +>.q.old-state  !!
+          ::   [%0 *]  +:!<([%shoe-app vase state-0] old-state)
+          ::   [%1 *]  +:!<([%shoe-app vase state-1] old-state)
+          :: ==
+        =^  caz  shoe  (on-load:og old-inner)
+        =^  cuz  old-outer
+          ?.  ?=(%0 -.old-outer)  [~ old-outer]
+          (state-0-to-1 old-outer)
+        ?>  ?=(%1 -.old-outer)
+        [(weld cuz (deal caz)) this(state old-outer)]
+    ::
+    +$  state-any  $%(state-1 state-0)
+    +$  state-0    [%0 soles=(map @ta sole-share)]
+    ++  state-0-to-1
+      |=  old=state-0
+      ^-  (quip card:agent:gall state-1)
+      :-  %+  turn  ~(tap in ~(key by soles.old))
+          |=  id=@ta
+          ^-  card:agent:gall
+          [%give %kick ~[/sole/[id]] ~]
+      :-  %1
+      %-  ~(gas by *(map sole-id sole-share))
+      %+  murn  ~(tap by soles.old)
+      |=  [id=@ta s=sole-share]
+      (bind (upgrade-id:sole id) (late s))
+    --
   ::
   ++  on-poke
     |=  [=mark =vase]
@@ -326,19 +352,18 @@
   ++  on-watch
     |=  =path
     ^-  (quip card:agent:gall agent:gall)
-    ?.  ?=([%sole @ ~] path)
+    ?~  sole-id=(path-to-id:sole path)
       =^  cards  shoe
         (on-watch:og path)
       [(deal cards) this]
-    =*  sole-id  i.t.path
-    ?>  (can-connect:og sole-id)
-    =.  soles  (~(put by soles) sole-id *sole-share)
+    ?>  (can-connect:og u.sole-id)
+    =.  soles  (~(put by soles) u.sole-id *sole-share)
     =^  cards  shoe
-      (on-connect:og sole-id)
+      (on-connect:og u.sole-id)
     :_  this
     %-  deal
     :_  cards
-    [%shoe [sole-id]~ %sole %pro & dap.bowl "> "]
+    [%shoe [u.sole-id]~ %sole %pro & dap.bowl "> "]
   ::
   ++  on-leave
     |=  =path

pkg/base-dev/lib/sole.hoon

@@ -136,4 +136,28 @@
   =+  dat=(transmute [%mor leg] [%ins pos `@c`0])
   ?>  ?=(%ins -.dat)
   p.dat
+::
+::
+++  path-to-id
+  |=  =path
+  ^-  (unit sole-id)
+  ?.  ?=([%sole @ ?(~ [@ ~])] path)  ~
+  ?~  who=(slaw %p i.t.path)  ~
+  `[u.who ?~(t.t.path %$ i.t.t.path)]
+::
+++  id-to-path
+  |=  sole-id
+  ^-  path
+  ::TODO  this whole "no empty path ending" business feels icky.
+  ::      do we want default session to be ~.~ ?
+  ::      concern here is that outsiders cannot subscribe to the default
+  ::      session, because /sole/~zod/ isn't a valid path...
+  [%sole (scot %p who) ?~(ses ~ /[ses])]
+::
+++  upgrade-id
+  |=  old=@ta
+  ^-  (unit sole-id)
+  %+  rush  old
+  %+  cook  (late %$)
+  ;~(pfix (jest 'drum_~') fed:ag)
 --

pkg/base-dev/mar/belt.hoon

@@ -1,5 +1,7 @@
 ::  belt: runtime belt structure
 ::
+/+  dill
+::
 |_  =belt:dill
 ++  grad  %noun
 ::  +grab: convert from
@@ -7,18 +9,7 @@
 ++  grab
   |%
   ++  noun  belt:dill
-  ++  json
-    ^-  $-(^json belt:dill)
-    =,  dejs:format
-    %-  of
-    :~  aro+(su (perk %d %l %r %u ~))
-        bac+ul
-        ctl+(cu taft so)
-        del+ul
-        met+(cu taft so)
-        ret+ul
-        txt+(ar (cu taft so))
-    ==
+  ++  json  belt:dejs:dill
   --
 ::  +grow: convert to
 ::

pkg/base-dev/mar/blit.hoon

@@ -1,5 +1,7 @@
 ::  blit: runtime blit structure
 ::
+/+  dill
+::
 |_  =blit:dill
 ++  grad  %noun
 ::  +grab: convert from
@@ -13,49 +15,6 @@
 ++  grow
   |%
   ++  noun  blit
-  ++  json
-    ^-  ^json
-    =,  enjs:format
-    %+  frond  -.blit
-    ?-  -.blit
-      %bel  b+&
-      %clr  b+&
-      %hop  (numb p.blit)
-      %lin  a+(turn p.blit |=(c=@c s+(tuft c)))
-      %mor  b+&
-      %url  s+p.blit
-    ::
-        %sag
-      %-  pairs
-      :~  'path'^(path p.blit)
-          'file'^s+(en:base64:mimes:html (as-octs:mimes:html (jam q.blit)))
-      ==
-    ::
-        %sav
-      %-  pairs
-      :~  'path'^(path p.blit)
-          'file'^s+(en:base64:mimes:html (as-octs:mimes:html q.blit))
-      ==
-    ::
-        %klr
-      :-  %a
-      %+  turn  p.blit
-      |=  [=stye text=(list @c)]
-      %-  pairs
-      :~  'text'^a+(turn text |=(c=@c s+(tuft c)))
-        ::
-          :-  'stye'
-          %-  pairs
-          |^  :~  'back'^(color p.q.stye)
-                  'fore'^(color q.q.stye)
-                  'deco'^a+(turn ~(tap in p.stye) |=(d=deco ?~(d ~ s+d)))
-              ==
-          ++  color
-            |=  =tint
-            ?@  tint  ?~(tint ~ s+tint)
-            s+(crip ((x-co:co 6) (rep 3 ~[b g r]:tint)))
-          --
-      ==
-    ==
+  ++  json  (blit:enjs:dill blit)
   --
 --

pkg/base-dev/mar/sole/action.hoon

@@ -20,7 +20,9 @@
     |=  jon=^json  ^-  sole-action
     %-  need  %.  jon
     =>  [dejs-soft:format ..sole-action]
-    |^  (ot id+so dat+(fo %ret (of det+change tab+ni ~)) ~)
+    |^  (ot id+id dat+(fo %ret (of det+change tab+ni ~)) ~)
+    ++  id
+      (ot who+(su ;~(pfix sig fed:ag)) ses+so ~)
     ++  fo
       |*  [a=term b=fist]
       |=(c=json ?.(=([%s a] c) (b c) (some [a ~])))

pkg/base-dev/sur/sole.hoon

@@ -3,8 +3,9 @@
   ::
 ^?
 |%
++$  sole-id  [who=@p ses=@ta]
 +$  sole-action                                         ::  sole to app
-  $:  id=@ta                                            ::  duct id
+  $:  id=sole-id                                        ::  session id
     $=  dat
     $%  ::  [%abo ~]                                    ::  reset interaction
         [%det sole-change]                              ::  command line edit

pkg/bitcoin/sys.kelvin

@@ -1 +1,2 @@
 [%zuse 417]
+[%zuse 416]

pkg/garden/sys.kelvin

@@ -1 +1 @@
-[%zuse 417]
+[%zuse 416]

pkg/hs/urbit-king/lib/Urbit/Arvo/Effect.hs

@@ -119,15 +119,25 @@ deriveNoun ''BehnEf
 data Blit
     = Bel ()
     | Clr ()
-    | Hop Word64
+    | Hop HopTarget
     | Klr Stub
-    | Lin [Char]
-    | Mor ()
+    | Put [Char]
+    | Nel ()
     | Sag Path Noun
     | Sav Path Atom
     | Url Cord
+    | Wyp ()
+    --TMP  backwards compatibility
+    | Lin [Char]
+    | Mor ()
   deriving (Eq, Ord)
 
+--NOTE  bottom-left-0-based coordinates
+data HopTarget
+    = Col Word64
+    | Roc Word64 Word64 -- row, col
+  deriving (Eq, Ord, Show)
+
 data Deco
     = DecoBl
     | DecoBr
@@ -205,18 +215,33 @@ instance FromNoun Tint where
                 "w" -> pure TintW
                 t   -> fail ("invalid: " <> unpack t)
 
+instance FromNoun HopTarget where
+  parseNoun = \case
+    A c           -> pure $ Col (fromIntegral c)
+    C (A r) (A c) -> pure $ Roc (fromIntegral r) (fromIntegral c)
+    n             -> fail ("invalid hop target: " <> show n)
+
+instance ToNoun HopTarget where
+  toNoun = \case
+    Col c   -> A (fromIntegral c)
+    Roc r c -> C (A (fromIntegral r)) (A (fromIntegral c))
+
 -- Manual instance to not save the noun/atom in Sag/Sav, because these can be
 -- megabytes and makes king hang.
 instance Show Blit where
   show (Bel ())     = "Bel ()"
   show (Clr ())     = "Clr ()"
-  show (Hop x)      = "Hop " ++ (show x)
+  show (Hop t)      = "Hop " ++ (show t)
   show (Klr s)      = "Klr " ++ (show s)
-  show (Lin c)      = "Lin " ++ (show c)
-  show (Mor ())     = "Mor ()"
+  show (Put c)      = "Put " ++ (show c)
+  show (Nel ())     = "Nel ()"
   show (Sag path _) = "Sag " ++ (show path)
   show (Sav path _) = "Sav " ++ (show path)
   show (Url c)      = "Url " ++ (show c)
+  show (Wyp ())     = "Wyp ()"
+  --
+  show (Lin c)      = "Lin " ++ (show c)
+  show (Mor ())     = "Mor ()"
 
 {-|
     %blip -- TODO

pkg/hs/urbit-king/lib/Urbit/Arvo/Event.hs

@@ -20,6 +20,7 @@ import Urbit.Arvo.Common (ReOrg(..), reorgThroughNoun)
 
 import qualified Crypto.Sign.Ed25519       as Ed
 import qualified Data.ByteString           as BS
+import qualified Data.Char                 as C
 import qualified Data.ByteString.Char8     as C
 import qualified Network.HTTP.Types.Method as H
 
@@ -318,19 +319,52 @@ data LegacyBootEvent
     | Dawn Dawn
   deriving (Eq, Show)
 
-data ArrowKey = D | L | R | U
+data Bolt
+    = Key Char
+    | Aro ArrowKey
+    | Bac ()
+    | Del ()
+    | Hit Word64 Word64
+    | Ret ()
   deriving (Eq, Ord, Show)
 
 data Belt
-    = Aro ArrowKey
-    | Bac ()
-    | Ctl Cord
-    | Del ()
-    | Met Cord
-    | Ret ()
+    = Bol Bolt
+    | Mod Modifier Bolt
     | Txt Tour
   deriving (Eq, Ord, Show)
 
+data ArrowKey = D | L | R | U
+  deriving (Eq, Ord, Show)
+
+data Modifier = Ctl | Met | Hyp
+  deriving (Eq, Ord, Show)
+
+--NOTE  required to get the above declarations into reify's type environment
+--      see also ghc/ghc#9813
+$(pure [])
+
+instance FromNoun Bolt where
+  parseNoun = \case
+    A c             -> pure $ Key $ C.chr $ fromIntegral c
+    C (A 7955819) _ -> fail "%key not valid bolt tag"
+    n               -> $(deriveFromNounFunc ''Bolt) n
+
+instance FromNoun Belt where
+  parseNoun = \case
+    C (A 7106402) _ -> fail "%bol not valid belt tag"
+    n               -> Bol <$> parseNoun n <|> $(deriveFromNounFunc ''Belt) n
+
+instance ToNoun Bolt where
+  toNoun = \case
+    Key c -> A $ fromIntegral $ C.ord c
+    n     -> $(deriveToNounFunc ''Bolt) n
+
+instance ToNoun Belt where
+  toNoun = \case
+    Bol b -> toNoun b
+    n     -> $(deriveToNounFunc ''Belt) n
+
 data TermEv
     = TermEvBelt (UD, ()) Belt
     | TermEvBlew (UD, ()) Word Word
@@ -341,7 +375,7 @@ data TermEv
 
 deriveNoun ''LegacyBootEvent
 deriveNoun ''ArrowKey
-deriveNoun ''Belt
+deriveNoun ''Modifier
 deriveNoun ''TermEv
 
 
@@ -392,27 +426,23 @@ instance FromNoun Ev where
 -- Short Event Names -----------------------------------------------------------
 
 {-
-    In the case of the user hitting enter, the cause is technically a
-    terminal event, but we don't display any name because the cause is
-    really the user.
+    In the case of user input, the cause is technically a terminal event,
+    but we don't display any name because the cause is really the user.
 -}
 getSpinnerNameForEvent :: Ev -> Maybe Text
 getSpinnerNameForEvent = \case
     EvBlip b -> case b of
-        BlipEvAmes _           -> Just "ames"
-        BlipEvArvo _           -> Just "arvo"
-        BlipEvBehn _           -> Just "behn"
-        BlipEvBoat _           -> Just "boat"
-        BlipEvHttpClient _     -> Just "iris"
-        BlipEvHttpServer _     -> Just "eyre"
-        BlipEvJael _           -> Just "jael"
-        BlipEvNewt _           -> Just "newt"
-        BlipEvSync _           -> Just "clay"
-        BlipEvTerm t | isRet t -> Nothing
-        BlipEvTerm t           -> Just "term"
-  where
-    isRet (TermEvBelt _ (Ret ())) = True
-    isRet _                       = False
+        BlipEvAmes _                -> Just "ames"
+        BlipEvArvo _                -> Just "arvo"
+        BlipEvBehn _                -> Just "behn"
+        BlipEvBoat _                -> Just "boat"
+        BlipEvHttpClient _          -> Just "iris"
+        BlipEvHttpServer _          -> Just "eyre"
+        BlipEvJael _                -> Just "jael"
+        BlipEvNewt _                -> Just "newt"
+        BlipEvSync _                -> Just "clay"
+        BlipEvTerm (TermEvBelt _ _) -> Nothing
+        BlipEvTerm t                -> Just "term"
 
 summarizeEvent :: Ev -> Text
 summarizeEvent ev =

pkg/hs/urbit-king/lib/Urbit/Vere/Pier.hs

@@ -333,7 +333,7 @@ pier (serf, log) vSlog startedSig injected = do
       io $ readTVarIO siteSlog >>= ($ s)
       logOther "serf" (display $ T.strip $ tankToText tank)
 
-  let err = atomically . Term.trace muxed . (<> "\r\n")
+  let err = atomically . Term.trace muxed
   (bootEvents, startDrivers) <- do
     env <- ask
     siz <- atomically $ Term.curDemuxSize demux

pkg/hs/urbit-king/lib/Urbit/Vere/Term.hs

@@ -45,8 +45,8 @@ import qualified Urbit.Vere.Term.Render   as T
 
 -- | All stateful data in the printing to stdOutput.
 data LineState = LineState
-  { lsLine            :: Text
-  , lsCurPos          :: Int
+  { lsLine            :: [(Stye, [Char])]
+  , lsCurPos          :: CurPos
   , lsSpinTimer       :: Maybe (Async ())
   , lsSpinCause       :: Maybe Text
   , lsSpinFirstRender :: Bool
@@ -54,11 +54,19 @@ data LineState = LineState
   , lsPrevEndTime     :: Wen
   }
 
+data CurPos = CurPos
+  { row :: Int
+  , col :: Int
+  }
+
 -- | A record used in reading data from stdInput.
 data ReadData = ReadData
   { rdBuf       :: Ptr Word8
   , rdEscape    :: Bool
   , rdBracket   :: Bool
+  , rdMouse     :: Bool
+  , rdMouseBut  :: Word8
+  , rdMouseCol  :: Word8
   , rdUTF8      :: ByteString
   , rdUTF8width :: Int
   }
@@ -165,7 +173,8 @@ leftBracket, rightBracket :: Text
 leftBracket = "«"
 rightBracket = "»"
 
-_spin_cool_us, _spin_warm_us, _spin_rate_us, _spin_idle_us :: Integral i => i
+_spin_fast_us, _spin_cool_us, _spin_warm_us, _spin_rate_us, _spin_idle_us :: Integral i => i
+_spin_fast_us = 100000
 _spin_cool_us = 500000
 _spin_warm_us = 50000
 _spin_rate_us = 250000
@@ -201,6 +210,9 @@ localClient doneSignal = fst <$> mkRAcquire start stop
                               -- to the muxing client.
                               putTMVar tsSizeChange ts)
 
+      -- start mouse reporting
+      putStr "\x1b[?9h"
+
       pWriterThread <- asyncBound
         (writeTerminal tsWriteQueue spinnerMVar tsizeTVar)
 
@@ -217,7 +229,7 @@ localClient doneSignal = fst <$> mkRAcquire start stop
 
       tsReadQueue <- newTQueueIO
       pReaderThread <- asyncBound
-          (readTerminal tsReadQueue tsWriteQueue (bell tsWriteQueue))
+          (readTerminal tsReadQueue tsWriteQueue tsizeTVar (bell tsWriteQueue))
 
       let client = Client { take = Just <$> asum
                               [ readTQueue tsReadQueue <&> ClientTakeBelt,
@@ -238,6 +250,9 @@ localClient doneSignal = fst <$> mkRAcquire start stop
       -- at shutdown, just leak the file descriptor.
       cancel pWriterThread
 
+      -- stop mouse reporting
+      putStr "\x1b[?9l"
+
       -- inject one final newline, as we're usually on the prompt.
       putStr "\r\n"
 
@@ -266,31 +281,50 @@ localClient doneSignal = fst <$> mkRAcquire start stop
 
     -- Writes data to the terminal. Both the terminal reading, normal logging,
     -- and effect handling can all emit bytes which go to the terminal.
+    --TODO  blanks, traces and slogs should only be written into the default
+    --      terminal session.
     writeTerminal :: TQueue [Term.Ev] -> TMVar () -> TVar TermSize -> RIO e ()
     writeTerminal q spinner termSizeVar = do
         currentTime <- io $ now
-        loop (LineState "" 0 Nothing Nothing True 0 currentTime)
+        loop
+          termSizeVar
+          (LineState [] (CurPos 0 0) Nothing Nothing True 0 currentTime)
       where
         writeBlank :: LineState -> RIO e LineState
-        writeBlank ls = putStr "\r\n" $> ls
+        writeBlank ls = do
+          TermSize _ height <- readTVarIO termSizeVar
+          --NOTE  hijack creates a blank line
+          T.hijack (fromIntegral height) $ pure ()
+          pure ls
 
         writeTrace :: LineState -> Text -> RIO e LineState
         writeTrace ls p = do
-            putStr "\r"
-            T.clearLine
-            putStr p
-            termRefreshLine ls
+            TermSize _ height <- readTVarIO termSizeVar
+            T.hijack (fromIntegral height) $ putStr p
+            pure ls
 
         writeSlog :: LineState -> (Atom, Tank) -> RIO e LineState
         writeSlog ls slog = do
-            putStr "\r"
-            T.clearLine
-            TermSize width _ <- atomically $ readTVar termSizeVar
-            -- TODO: Ignoring priority for now. Priority changes the color of,
-            -- and adds a prefix of '>' to, the output.
-            let lines = fmap unTape $ wash (WashCfg 0 width) $ tankTree $ snd slog
-            forM lines $ \line -> putStr (line <> "\r\n")
-            termRefreshLine ls
+            TermSize width height <- readTVarIO termSizeVar
+            T.hijack (fromIntegral height) do
+              let lines = fmap (pref . unTape) $
+                            wash (WashCfg 0 width) $ tankTree $ snd slog
+              T.putCsi 'm' styl
+              forM (intersperse "\n" lines) $ \line -> putStr line
+              T.putCsi 'm' [0]
+            pure ls
+            where
+              prio = fromIntegral $ fst slog
+              maxp = 3
+              styl
+                | prio == 3 = [31]
+                | prio == 2 = [33]
+                | prio == 1 = [32]
+                | otherwise = [90]
+              pref
+                | prio > 0 && prio <= maxp =
+                    ((replicate prio '>' ++ replicate (1 + maxp - prio) ' ') ++)
+                | otherwise = id
 
         {-
             Figure out how long to wait to show the spinner. When we
@@ -305,7 +339,7 @@ localClient doneSignal = fst <$> mkRAcquire start stop
 
             current <- io $ now
             delay   <- pure $ case mTxt of
-                Nothing -> 0
+                Nothing -> _spin_fast_us
                 Just _  ->
                   if (gap current lsPrevEndTime ^. microSecs) < _spin_idle_us
                   then _spin_warm_us
@@ -326,34 +360,41 @@ localClient doneSignal = fst <$> mkRAcquire start stop
               maybe (pure ()) cancel lsSpinTimer
               -- We do a final flush of the spinner mvar to ensure we don't
               -- have a lingering signal which will redisplay the spinner after
-              -- we call termRefreshLine below.
+              -- we call termRestoreLine below.
               atomically $ tryTakeTMVar spinner
 
               -- If we ever actually ran the spinner display callback, we need
               -- to force a redisplay of the command prompt.
-              ls <- if not lsSpinFirstRender || True
-                    then termRefreshLine ls
-                    else pure ls
+              if not lsSpinFirstRender
+              then termRestoreLine ls termSizeVar
+              else pure ()
 
               endTime <- io $ now
               pure $ ls { lsSpinTimer = Nothing, lsPrevEndTime = endTime }
 
         execEv :: LineState -> Term.Ev -> RIO e LineState
         execEv ls = \case
-            Term.Blits bs         -> foldM writeBlit ls bs
+            Term.Blits bs         -> foldM (writeBlit termSizeVar) ls bs
             Term.Trace p          -> writeTrace ls (unCord p)
             Term.Slog s           -> writeSlog ls s
             Term.Blank            -> writeBlank ls
             Term.Spinr (Just txt) -> doSpin ls (unCord <$> txt)
             Term.Spinr Nothing    -> unspin ls
 
-        --  TODO What does this do?
-        spin :: LineState -> RIO e LineState
-        spin ls@LineState{..} = do
+        spin :: TVar TermSize -> LineState -> RIO e LineState
+        spin ts ls@LineState{..} = do
             let spinner = (spinners !! lsSpinFrame) ++ case lsSpinCause of
                   Nothing  -> ""
                   Just str -> leftBracket ++ str ++ rightBracket
 
+            --NOTE  even after first render, because cursor might have moved...
+            if row lsCurPos > 0
+              then do
+                TermSize _ h <- readTVarIO ts
+                T.cursorMove (fromIntegral h - 1) 0
+              else
+                T.cursorRestore
+
             putStr (spinner <> pack (ANSI.cursorBackwardCode (length spinner)))
 
             let newFrame = (lsSpinFrame + 1) `mod` length spinners
@@ -362,28 +403,35 @@ localClient doneSignal = fst <$> mkRAcquire start stop
                       , lsSpinFrame       = newFrame
                       }
 
-        loop :: LineState -> RIO e ()
-        loop ls = do
+        loop :: TVar TermSize -> LineState -> RIO e ()
+        loop ts ls = do
             join $ atomically $ asum
-                [ readTQueue q      >>= pure . (foldM execEv ls >=> loop)
-                , takeTMVar spinner >>  pure (spin ls >>= loop)
+                [ readTQueue q      >>= pure . (foldM execEv ls >=> loop ts)
+                , takeTMVar spinner >>  pure (spin ts ls >>= loop ts)
                 ]
 
     -- Writes an individual blit to the screen
-    writeBlit :: LineState -> Blit -> RIO e LineState
-    writeBlit ls = \case
+    writeBlit :: TVar TermSize -> LineState -> Blit -> RIO e LineState
+    writeBlit ts ls = \case
       Bel ()        -> T.soundBell $> ls
       Clr ()        -> do T.clearScreen
-                          termRefreshLine ls
-      Hop w         -> termShowCursor ls (fromIntegral w)
-      Klr s         -> do ls2 <- termShowClear ls
-                          termShowStub ls2 s
-      Lin c         -> do ls2 <- termShowClear ls
-                          termShowLine ls2 (pack c)
-      Mor ()        -> termShowMore ls
+                          T.cursorRestore
+                          pure ls
+      Hop t         -> case t of
+          Col c     -> termShowCursor ls ts 0 (fromIntegral c)
+          Roc r c   -> termShowCursor ls ts (fromIntegral r) (fromIntegral c)
+      Klr s         -> termShowStub ls s
+      Put c         -> termShowLine ls (pack c)
+      Nel ()        -> termShowNewline ls
       Sag path noun -> pure ls
       Sav path atom -> pure ls
       Url url       -> pure ls
+      Wyp ()        -> termShowClear ls
+      --
+      Lin c         -> do termShowCursor ls ts 0 0
+                          termShowClear ls
+                          termShowLine ls (pack c)
+      Mor ()        -> termShowNewline ls
 
     termRenderDeco :: Deco -> Char
     termRenderDeco = \case
@@ -428,55 +476,88 @@ localClient doneSignal = fst <$> mkRAcquire start stop
 
         styled = mconcat [escape, styles, "m", tape, escape, "0m"]
 
-    -- Displays and sets styled text as the current line
+    bareStub :: [Char] -> [(Stye, [Char])]
+    bareStub c = [(Stye (setToHoonSet mempty) TintNull TintNull, c)]
+
+    -- overwrite substring of base with put, starting at index
+    overwriteStub :: [(Stye, [Char])] -> Int -> [(Stye, [Char])] -> [(Stye, [Char])]
+    overwriteStub base index put =
+         scagStub index base
+      ++ ( let l = lentStub base in
+           if index <= l then []
+           else bareStub $ take (index - l) [' ',' '..]
+         )
+      ++ put
+      ++ slagStub (index + lentStub put) base
+      where
+        lentStub :: [(Stye, [Char])] -> Int
+        lentStub s = sum $ map (length . snd) s
+
+        scagStub :: Int -> [(Stye, [Char])] -> [(Stye, [Char])]
+        scagStub 0 _  = []
+        scagStub _ [] = []
+        scagStub i ((y,c):s) =
+          (y, take i c) : scagStub (i - min i (length c)) s
+
+        slagStub :: Int -> [(Stye, [Char])] -> [(Stye, [Char])]
+        slagStub 0 s  = s
+        slagStub _ [] = []
+        slagStub i ((y,c):s)
+          | i > l     = slagStub (i - l) s
+          | otherwise = (y, drop i c) : s
+          where l = length c
+
+    -- Displays styled text at the cursor
     termShowStub :: LineState -> Stub -> RIO e LineState
-    termShowStub ls (Stub s) = do
-      let visualLength = sum $ fmap (length . snd) s
-      let outText = pack $ mconcat $ fmap (uncurry termRenderStubSegment) s
-      putStr outText
-      pure ls { lsLine = outText, lsCurPos = visualLength }
+    termShowStub ls@LineState{lsCurPos, lsLine} (Stub s) = do
+      putStr $ pack $ mconcat $ fmap (uncurry termRenderStubSegment) s
+      T.cursorRestore
+      case row lsCurPos of
+        0 -> pure ls { lsLine = overwriteStub lsLine (col lsCurPos) s }
+        _ -> pure ls
 
     -- Moves the cursor to the requested position
-    termShowCursor :: LineState -> Int -> RIO e LineState
-    termShowCursor ls@LineState{..} {-line pos)-} newPos = do
-      if newPos < lsCurPos then do
-        T.cursorLeft (lsCurPos - newPos)
-        pure ls { lsCurPos =  newPos }
-      else if newPos > lsCurPos then do
-        T.cursorRight (newPos - lsCurPos)
-        pure ls { lsCurPos =  newPos }
-      else
-        pure ls
-
-    -- Moves the cursor left without any mutation of the LineState. Used only
-    -- in cursor spinning.
-    _termSpinnerMoveLeft :: Int -> RIO e ()
-    _termSpinnerMoveLeft = T.cursorLeft
+    termShowCursor :: LineState -> TVar TermSize -> Int -> Int -> RIO e LineState
+    termShowCursor ls ts row col = do
+      TermSize _ h <- readTVarIO ts
+      T.cursorMove (max 0 (fromIntegral h - row - 1)) col
+      T.cursorSave
+      pure ls { lsCurPos = CurPos row col }
 
     -- Displays and sets the current line
     termShowLine :: LineState -> Text -> RIO e LineState
-    termShowLine ls newStr = do
+    termShowLine ls@LineState{lsCurPos, lsLine} newStr = do
       putStr newStr
-      pure ls { lsLine = newStr, lsCurPos = (length newStr) }
+      T.cursorRestore
+      case row lsCurPos of
+        0 -> pure ls { lsLine = overwriteStub lsLine (col lsCurPos) (bareStub $ unpack newStr) }
+        _ -> pure ls
 
     termShowClear :: LineState -> RIO e LineState
-    termShowClear ls = do
+    termShowClear ls@LineState{lsCurPos} = do
         putStr "\r"
         T.clearLine
-        pure ls { lsLine = "", lsCurPos = 0  }
+        T.cursorRestore
+        case row lsCurPos of
+          0 -> pure ls { lsLine = [] }
+          _ -> pure ls
 
     -- New Current Line
-    termShowMore :: LineState -> RIO e LineState
-    termShowMore ls = do
+    termShowNewline :: LineState -> RIO e LineState
+    termShowNewline ls@LineState{lsCurPos} = do
       putStr "\r\n"
-      pure ls { lsLine = "", lsCurPos = 0  }
+      case row lsCurPos of
+        0 -> pure ls { lsLine = [], lsCurPos = lsCurPos { col = 0 } }
+        r -> pure ls { lsCurPos = CurPos (r-1) 0 }
 
-    -- Redraw the current LineState, maintaining the current curpos
-    termRefreshLine :: LineState -> RIO e LineState
-    termRefreshLine ls@LineState{lsCurPos,lsLine} = do
-      ls <- termShowClear ls
-      ls <- termShowLine ls lsLine
-      termShowCursor ls lsCurPos
+    -- Redraw the bottom LineState, maintaining the current curpos
+    termRestoreLine :: LineState -> TVar TermSize -> RIO e ()
+    termRestoreLine ls@LineState{lsLine} ts = do
+      TermSize _ h <- readTVarIO ts
+      T.cursorMove (fromIntegral h - 1) 0
+      T.clearLine
+      putStr $ pack $ mconcat $ fmap (uncurry termRenderStubSegment) lsLine
+      T.cursorRestore
 
     -- ring my bell
     bell :: TQueue [Term.Ev] -> RIO e ()
@@ -491,9 +572,14 @@ localClient doneSignal = fst <$> mkRAcquire start stop
     -- A better way to do this would be to get some sort of epoll on stdInput,
     -- since that's kinda closer to what libuv does?
     readTerminal :: forall e. HasLogFunc e
-                 => TQueue Belt -> TQueue [Term.Ev] -> (RIO e ()) -> RIO e ()
-    readTerminal rq wq bell =
-      rioAllocaBytes 1 $ \ buf -> loop (ReadData buf False False mempty 0)
+                 => TQueue Belt
+                 -> TQueue [Term.Ev]
+                 -> TVar TermSize
+                 -> RIO e ()
+                 -> RIO e ()
+    readTerminal rq wq ts bell =
+      rioAllocaBytes 1 $ \ buf
+        -> loop (ReadData buf False False False 0 0 mempty 0)
       where
         loop :: ReadData -> RIO e ()
         loop rd@ReadData{..} = do
@@ -513,26 +599,41 @@ localClient doneSignal = fst <$> mkRAcquire start stop
               if rdEscape then
                 if rdBracket then do
                   case c of
-                    'A' -> sendBelt $ Aro U
-                    'B' -> sendBelt $ Aro D
-                    'C' -> sendBelt $ Aro R
-                    'D' -> sendBelt $ Aro L
+                    'A' -> sendBelt $ Bol $ Aro U
+                    'B' -> sendBelt $ Bol $ Aro D
+                    'C' -> sendBelt $ Bol $ Aro R
+                    'D' -> sendBelt $ Bol $ Aro L
+                    'M' -> pure ()
                     _   -> bell
-                  loop rd { rdEscape = False, rdBracket = False}
+                  rd <- case c of
+                          'M' -> pure rd { rdMouse = True }
+                          _   -> pure rd
+                  loop rd { rdEscape = False, rdBracket = False }
                 else if isAsciiLower c then do
-                  sendBelt $ Met $ Cord $ pack [c]
-                  loop rd { rdEscape = False }
-                else if c == '.' then do
-                  sendBelt $ Met $ Cord "dot"
+                  sendBelt $ Mod Met $ Key c
                   loop rd { rdEscape = False }
                 else if w == 8 || w == 127 then do
-                  sendBelt $ Met $ Cord "bac"
+                  sendBelt $ Mod Met $ Bac ()
                   loop rd { rdEscape = False }
                 else if c == '[' || c == '0' then do
                   loop rd { rdBracket = True }
                 else do
                   bell
                   loop rd { rdEscape = False }
+              else if rdMouse then
+                if rdMouseBut == 0 then do
+                  loop rd { rdMouseBut = w - 31 }
+                else if rdMouseCol == 0 then do
+                  loop rd { rdMouseCol = w - 32 }
+                else do
+                  if rdMouseBut == 1 then do
+                    let rdMouseRow = w - 32
+                    TermSize _ h <- readTVarIO ts
+                    sendBelt $ Bol $ Hit
+                      (fromIntegral h - fromIntegral rdMouseRow)
+                      (fromIntegral rdMouseCol - 1)
+                  else do pure ()
+                  loop rd { rdMouse = False, rdMouseBut = 0, rdMouseCol = 0 }
               else if rdUTF8width /= 0 then do
                 -- continue reading into the utf8 accumulation buffer
                 rd@ReadData{..} <- pure rd { rdUTF8 = snoc rdUTF8 w }
@@ -543,30 +644,31 @@ localClient doneSignal = fst <$> mkRAcquire start stop
                       error "empty utf8 accumulation buffer"
                     Just (c, bytes) | bytes /= rdUTF8width ->
                       error "utf8 character size mismatch?!"
-                    Just (c, bytes) -> sendBelt $ Txt $ Tour $ [c]
+                    Just (c, bytes) -> sendBelt $ Bol $ Key c
                   loop rd { rdUTF8 = mempty, rdUTF8width = 0 }
               else if w >= 32 && w < 127 then do
-                sendBelt $ Txt $ Tour $ [c]
+                sendBelt $ Bol $ Key c
                 loop rd
               else if w == 0 then do
                 bell
                 loop rd
               else if w == 8 || w == 127 then do
-                sendBelt $ Bac ()
+                sendBelt $ Bol $ Bac ()
                 loop rd
               else if w == 13 then do
-                sendBelt $ Ret ()
+                sendBelt $ Bol $ Ret ()
                 loop rd
               else if w == 3 then do
                 -- ETX (^C)
                 logInfo $ "Ctrl-c interrupt"
                 atomically $ do
-                  writeTQueue wq [Term.Trace "interrupt\r\n"]
-                  writeTQueue rq $ Ctl $ Cord "c"
+                  writeTQueue wq [Term.Trace "interrupt"]
+                  writeTQueue rq $ Mod Ctl $ Key 'c'
                 loop rd
               else if w <= 26 then do
-                case pack [BS.w2c (w + 97 - 1)] of
-                    c   -> do sendBelt $ Ctl $ Cord c
+                case BS.w2c (w + 97 - 1) of
+                    'd' -> atomically doneSignal
+                    c   -> do sendBelt $ Mod Ctl $ Key c
                               loop rd
               else if w == 27 then do
                 loop rd { rdEscape = True }
@@ -643,7 +745,7 @@ term env (tsize, Client{..}) plan stat serfSIGINT = runTerm
         atomically take >>= \case
             Nothing                              -> pure ()
             Just (ClientTakeBelt b)              -> do
-                when (b == Ctl (Cord "c")) $ do
+                when (b == Mod Ctl (Key 'c')) $ do
                   io serfSIGINT
                 let beltEv       = EvBlip $ BlipEvTerm $ TermEvBelt (UD 1, ()) $ b
                 let beltFailed _ = pure ()

pkg/hs/urbit-king/lib/Urbit/Vere/Term/API.hs

@@ -22,7 +22,7 @@ import Urbit.TermSize
     Input Event for terminal driver:
 
     %blits -- list of blits from arvo.
-    %trace -- stderr line from runtime.
+    %trace -- stderr line from runtime (without trailing newline).
     %slog  -- nock worker logging with priority
     %blank -- print a blank line
     %spinr -- Start or stop the spinner

pkg/hs/urbit-king/lib/Urbit/Vere/Term/Logic.hs

@@ -39,11 +39,11 @@ data Ev
     = EvLine Text
     | EvSlog (Atom, Tank)
     | EvSpin SpinnerState
-    | EvMove Word
+    | EvMove (Word, Word)
     | EvBell
     | EvDraw
     | EvEdit Text
-    | EvMore
+    | EvNewl
   deriving (Show)
 
 data Ef
@@ -62,7 +62,7 @@ data History
 data St = St
     { sHistory :: !(Seq History)
     , sLine    :: !Text
-    , sCurPos  :: !Word
+    , sCurPos  :: !(Word, Word)
     , sSpinner :: !SpinnerState
     }
   deriving (Show)
@@ -70,10 +70,10 @@ data St = St
 --------------------------------------------------------------------------------
 
 init :: St
-init = St mempty "" 0 Nothing
+init = St mempty "" (0, 0) Nothing
 
 {-|
-    When we process `EvMore`, we need to append a newline to the end of
+    When we process `EvNewl`, we need to append a newline to the end of
     the current line. During normal play, the ENTER key inserts the
     newline for us, so we need to recreate that newline when we rebuild
     the state for a new terminal connection.
@@ -83,15 +83,17 @@ step st@St{..} = \case
     EvLine t -> st & recordText t
     EvSlog s -> st & recordSlog s
     EvSpin s -> st { sSpinner = s }
-    EvMove w -> st { sCurPos = min w (word $ length sLine) }
-    EvEdit t -> st { sLine = t, sCurPos = word (length t) }
-    EvMore   -> st { sLine = "", sCurPos = 0 } & recordText (sLine <> "\n")
+    EvMove p -> st { sCurPos = p }
     EvBell   -> st
     EvDraw   -> st
+    EvEdit t | (0, _) <- sCurPos -> st { sLine = t }
+             | otherwise         -> st
+    EvNewl   | (0, _) <- sCurPos ->
+                 st { sLine = "", sCurPos = (0, 0) }
+                 & recordText (sLine <> "\n")
+             | otherwise ->
+                 st { sCurPos = (fst sCurPos - 1, 0) }
   where
-    word :: Integral i => i -> Word
-    word = fromIntegral
-
     recordText :: Text -> St -> St
     recordText !t st@St{..} = st {
       sHistory = trim (sHistory |> (HistoryText t))
@@ -111,8 +113,10 @@ drawState :: St -> [Ev]
 drawState St{..} = hist <> out <> cur <> spin
   where
     hist = drawHistory <$> toList sHistory
-    out  = if null sLine   then [] else [EvEdit sLine]
-    cur  = if 0 == sCurPos then [] else [EvMove $ fromIntegral $ sCurPos]
+    out  | null sLine = []
+         | otherwise  = [EvEdit sLine]
+    cur  | (0, _) <- sCurPos = []
+         | otherwise         = [EvMove sCurPos]
     spin = maybe [] (singleton . EvSpin . Just) sSpinner
 
     drawHistory (HistoryText t) = EvLine t
@@ -123,12 +127,13 @@ drawState St{..} = hist <> out <> cur <> spin
 
 fromBlit :: Arvo.Blit -> Maybe Ev
 fromBlit = \case
-    Arvo.Hop w  -> Just $ EvMove $ fromIntegral w
-    Arvo.Bel () -> Just EvBell
-    Arvo.Clr () -> Just EvDraw
-    Arvo.Lin s  -> Just $ EvEdit (pack s)
-    Arvo.Mor () -> Just EvMore
-    _           -> Nothing
+    Arvo.Hop (Arvo.Col c)   -> Just $ EvMove (0, fromIntegral c)
+    Arvo.Hop (Arvo.Roc r c) -> Just $ EvMove (fromIntegral r, fromIntegral c)
+    Arvo.Bel ()             -> Just EvBell
+    Arvo.Clr ()             -> Just EvDraw
+    Arvo.Put s              -> Just $ EvEdit (pack s)
+    Arvo.Nel ()             -> Just EvNewl
+    _                       -> Nothing
 
 toCause :: Maybe Cord -> SpinnerCause
 toCause Nothing         = User
@@ -148,12 +153,12 @@ fromTermEv = \case
 
 toTermEv :: Ev -> Term.Ev
 toTermEv = \case
-    EvLine "" -> Term.Blank
-    EvLine t  -> Term.Trace (Cord t)
-    EvSlog s  -> Term.Slog s
-    EvSpin s  -> Term.Spinr (fromCause <$> s)
-    EvMove w  -> Term.Blits [Arvo.Hop $ fromIntegral w]
-    EvBell    -> Term.Blits [Arvo.Bel ()]
-    EvDraw    -> Term.Blits [Arvo.Clr ()]
-    EvEdit t  -> Term.Blits [Arvo.Lin $ unpack t]
-    EvMore    -> Term.Blits [Arvo.Mor ()]
+    EvLine ""     -> Term.Blank
+    EvLine t      -> Term.Trace (Cord t)
+    EvSlog s      -> Term.Slog s
+    EvSpin s      -> Term.Spinr (fromCause <$> s)
+    EvMove (r, c) -> Term.Blits [Arvo.Hop $ Arvo.Roc (fromIntegral r) (fromIntegral c)]
+    EvBell        -> Term.Blits [Arvo.Bel ()]
+    EvDraw        -> Term.Blits [Arvo.Clr ()]
+    EvEdit t      -> Term.Blits [Arvo.Put $ unpack t]
+    EvNewl        -> Term.Blits [Arvo.Nel ()]

pkg/hs/urbit-king/lib/Urbit/Vere/Term/Render.hs

@@ -4,9 +4,12 @@
 module Urbit.Vere.Term.Render
     ( clearScreen
     , clearLine
-    , cursorRight
-    , cursorLeft
     , soundBell
+    , cursorMove
+    , cursorSave
+    , cursorRestore
+    , putCsi
+    , hijack
     ) where
 
 import Urbit.Prelude
@@ -25,8 +28,27 @@ clearLine = liftIO $ ANSI.clearLine
 soundBell :: MonadIO m => m ()
 soundBell = liftIO $ putStr "\a"
 
-cursorLeft :: MonadIO m => Int -> m ()
-cursorLeft = liftIO . ANSI.cursorBackward
+--NOTE  top-left-0-based coordinates
+cursorMove :: MonadIO m => Int -> Int -> m ()
+cursorMove r c = liftIO $ ANSI.setCursorPosition r c
 
-cursorRight :: MonadIO m => Int -> m ()
-cursorRight = liftIO . ANSI.cursorForward
+cursorSave :: MonadIO m => m ()
+cursorSave = liftIO ANSI.saveCursor
+
+cursorRestore :: MonadIO m => m ()
+cursorRestore = liftIO ANSI.restoreCursor
+
+putCsi :: MonadIO m => Char -> [Int] -> m ()
+putCsi c a = liftIO do
+    putStr "\x1b["
+    putStr $ pack $ mconcat $ intersperse ";" (fmap show a)
+    putStr $ pack [c]
+
+hijack :: MonadIO m => Int -> IO () -> m ()
+hijack h d = liftIO do
+    putCsi 'r' [1, h-1]  --  set scroll region to exclude bottom line
+    putCsi 'S' [1]       --  scroll up one line
+    cursorMove (h-2) 0   --  move cursor to empty space
+    d
+    putCsi 'r' []        --  reset scroll region
+    cursorRestore        --  restory cursor position

pkg/interface/dbug/src/css/custom.css

@@ -158,6 +158,7 @@ a {
 @media all and (prefers-color-scheme: dark) {
   body {
     background-color: #333;
+    color: white;
   }
   .bg-black-d {
     background-color: black;

pkg/interface/webterm/.eslintrc.js

@@ -0,0 +1,23 @@
+module.exports = exports = {
+  "rules": {
+    "spaced-comment": 0,
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:import/errors",
+    "plugin:react/recommended",
+  ],
+  "settings": {
+    "react": {
+      "version": "detect"
+    },
+    "import/resolver": {
+      typescript: {} // this loads <rootdir>/tsconfig.json to eslint
+    },
+  },
+  "env": {
+    "browser": true,
+    "es6": true
+  },
+  "plugins": ["import", "react-hooks"]
+}

pkg/interface/webterm/.nvmrc

@@ -0,0 +1 @@
+16.14.0

pkg/interface/webterm/App.tsx

@@ -0,0 +1,94 @@
+import React, {
+  useCallback, useEffect
+} from 'react';
+
+import useTermState from './state';
+import { useDark } from './lib/useDark';
+import api from './api';
+
+import { _dark, _light } from '@tlon/indigo-react';
+
+import 'xterm/css/xterm.css';
+
+import {
+  scrySessions
+} from '@urbit/api/term';
+
+import { ThemeProvider } from 'styled-components';
+import { Tabs } from './Tabs';
+import Buffer from './Buffer';
+import { DEFAULT_SESSION } from './constants';
+import { showSlog } from './lib/blit';
+import { InfoButton } from './InfoButton';
+
+const initSessions = async () => {
+  const response = await api.scry(scrySessions());
+
+  useTermState.getState().set((state) => {
+    state.names = response.sort();
+  });
+};
+
+export default function TermApp() {
+  const { names, selected } = useTermState();
+  const dark = useDark();
+
+  const setupSlog = useCallback(() => {
+    console.log('slog: setting up...');
+    let available = false;
+    const slog = new EventSource('/~_~/slog', { withCredentials: true });
+
+    slog.onopen = () => {
+      console.log('slog: opened stream');
+      available = true;
+    };
+
+    slog.onmessage = (e) => {
+      const session = useTermState.getState().sessions[DEFAULT_SESSION];
+      if (!session) {
+        console.log('slog: default session mia!', 'msg:', e.data);
+        console.log(Object.keys(useTermState.getState().sessions), session);
+        return;
+      }
+      showSlog(session.term, e.data);
+    };
+
+    slog.onerror = (e) => {
+      console.error('slog: eventsource error:', e);
+      if (available) {
+        window.setTimeout(() => {
+          if (slog.readyState !== EventSource.CLOSED) {
+            return;
+          }
+          console.log('slog: reconnecting...');
+          setupSlog();
+        }, 10000);
+      }
+    };
+
+    useTermState.getState().set((state) => {
+      state.slogstream = slog;
+    });
+  }, []);
+
+  useEffect(() => {
+    initSessions();
+    setupSlog();
+  }, []);
+
+  return (
+    <>
+      <ThemeProvider theme={dark ? _dark : _light}>
+        <div className="header">
+          <Tabs />
+          <InfoButton />
+        </div>
+        <div className="buffer-container">
+          {names.map((name) => {
+            return <Buffer key={name} name={name} selected={name === selected} dark={dark} />;
+          })}
+        </div>
+      </ThemeProvider>
+    </>
+  );
+}

pkg/interface/webterm/Buffer.tsx

@@ -0,0 +1,350 @@
+import { Terminal, ITerminalOptions } from 'xterm';
+import { FitAddon } from 'xterm-addon-fit';
+import { debounce } from 'lodash';
+import bel from './lib/bel';
+import api from './api';
+
+import {
+  Belt, pokeTask, pokeBelt
+} from '@urbit/api/term';
+import { Session } from './state';
+import { useCallback, useEffect, useRef } from 'react';
+import useTermState from './state';
+import React from 'react';
+import { Box, Col } from '@tlon/indigo-react';
+import { makeTheme } from './lib/theme';
+import { showBlit, csi, hasBell } from './lib/blit';
+import { DEFAULT_SESSION, RESIZE_DEBOUNCE_MS, RESIZE_THRESHOLD_PX } from './constants';
+import { retry } from './lib/retry';
+
+const termConfig: ITerminalOptions = {
+  logLevel: 'warn',
+  //
+  convertEol: true,
+  //
+  rows: 24,
+  cols: 80,
+  scrollback: 10000,
+  //
+  fontFamily: '"Source Code Pro", "Roboto mono", "Courier New", monospace',
+  fontWeight: 400,
+  // NOTE  theme colors configured dynamically
+  //
+  bellStyle: 'sound',
+  bellSound: bel,
+  //
+  //  allows text selection by holding modifier (option, or shift)
+  macOptionClickForcesSelection: true,
+  //  prevent insertion of simulated arrow keys on-altclick
+  altClickMovesCursor: false
+};
+
+const readInput = (term: Terminal, e: string): Belt[] => {
+  const belts: Belt[] = [];
+  let strap = '';
+
+  while (e.length > 0) {
+    let c = e.charCodeAt(0);
+
+    //  text input
+    //
+    if (c >= 32 && c !== 127) {
+      strap += e[0];
+      e = e.slice(1);  //TODO  revisit wrt (list @c) & unicode characters
+      continue;
+    } else if ('' !== strap) {
+      belts.push({ txt: strap.split('') });
+      strap = '';
+    }
+
+    //  special keys/characters
+    //
+    if (0 === c) {
+      term.write('\x07');  //  bel
+    } else if (8 === c || 127 === c) {
+      belts.push({ bac: null });
+    } else if (13 === c) {
+      belts.push({ ret: null });
+    } else if (c <= 26) {
+      const k = String.fromCharCode(96 + c);
+      //NOTE  prevent remote shut-downs
+      if ('d' !== k) {
+        belts.push({ mod: { mod: 'ctl', key: k } });
+      }
+    }
+
+    //  escape sequences
+    //
+    if (27 === c) {  //  ESC
+      e = e.slice(1);
+      c = e.charCodeAt(0);
+      if (91 === c || 79 === c) {  //  [ or O
+        e = e.slice(1);
+        c = e.charCodeAt(0);
+        /* eslint-disable max-statements-per-line */
+        switch (c) {
+          case 65: belts.push({ aro: 'u' }); break;
+          case 66: belts.push({ aro: 'd' }); break;
+          case 67: belts.push({ aro: 'r' }); break;
+          case 68: belts.push({ aro: 'l' }); break;
+        //
+          case 77: {
+            const m = e.charCodeAt(1) - 31;
+            if (1 === m) {
+              const c = e.charCodeAt(2) - 32;
+              const r = e.charCodeAt(3) - 32;
+              belts.push({ hit: { y: r - 1, x: c - 1 } });
+            }
+            e = e.slice(3);
+            break;
+          }
+        //
+          default: term.write('\x07'); break;  //  bel
+        }
+      } else if (c >= 97 && c <= 122) {  //  a <= c <= z
+        belts.push({ mod: { mod: 'met', key: e[0] } });
+      } else if (c === 46) {  //  .
+        belts.push({ mod: { mod: 'met', key: '.' } });
+      } else if (c === 8 || c === 127) {
+        belts.push({ mod: { mod: 'met', key: { bac: null } } });
+      } else {
+        term.write('\x07'); break;  //  bel
+      }
+    }
+
+    e = e.slice(1);
+  }
+  if ('' !== strap) {
+    if (1 === strap.length) {
+      belts.push(strap);
+    } else {
+      belts.push({ txt: strap.split('') });
+    }
+    strap = '';
+  }
+  return belts;
+};
+
+const onResize = async (name: string, session: Session) => {
+  if (session) {
+    session.fit.fit();
+    useTermState.getState().set((state) => {
+      state.sessions[name].pending++;
+    });
+    api.poke(pokeTask(name, { blew: { w: session.term.cols, h: session.term.rows } })).then(() => {
+      useTermState.getState().set((state) => {
+        state.sessions[name].pending--;
+      });
+    });
+  }
+};
+
+const onInput = (name: string, session: Session, e: string) => {
+  if (!session) {
+    return;
+  }
+  const term = session.term;
+  const belts = readInput(term, e);
+  belts.forEach((b) => {
+    useTermState.getState().set((state) => {
+      state.sessions[name].pending++;
+    });
+    api.poke(pokeBelt(name, b)).then(() => {
+      useTermState.getState().set((state) => {
+        state.sessions[name].pending--;
+      });
+    });
+  });
+};
+
+interface BufferProps {
+  name: string,
+  selected: boolean,
+  dark: boolean,
+}
+
+export default function Buffer({ name, selected, dark }: BufferProps) {
+  const containerRef = useRef<HTMLDivElement | null>(null);
+
+  const session: Session = useTermState(s => s.sessions[name]);
+
+  const initSession = useCallback(async (name: string, dark: boolean) => {
+    console.log('setting up', name === DEFAULT_SESSION ? 'default' : name);
+
+    //  set up xterm terminal
+    //
+    const term = new Terminal(termConfig);
+    term.options.theme = makeTheme(dark);
+    const fit = new FitAddon();
+    term.loadAddon(fit);
+    fit.fit();
+    term.focus();
+
+    //  start mouse reporting
+    //
+    term.write(csi('?9h'));
+
+    const ses: Session = {
+      term,
+      fit,
+      hasBell: false,
+      pending: 0,
+      subscriptionId: null
+    };
+
+    //  set up event handlers
+    //
+    term.attachCustomKeyEventHandler((e: KeyboardEvent) => {
+      //NOTE  ctrl+shift keypresses never make it into term.onData somehow,
+      //      so we handle them specially ourselves.
+      //      we may be able to remove this once xterm.js fixes #3382 & co.
+      if (e.shiftKey
+       && e.ctrlKey
+       && e.type === 'keydown'
+       && e.key.length === 1
+      ) {
+        api.poke(pokeBelt(name, { mod: { mod: 'ctl', key: e.key } }));
+        return false;
+      }
+      return true;
+    });
+    term.onData(e => onInput(name, ses, e));
+    term.onBinary(e => onInput(name, ses, e));
+
+    //  open subscription
+    //
+    const initSubscription = async () => {
+      const subscriptionId = await api.subscribe({
+        app: 'herm', path: '/session/' + name + '/view',
+        event: (e) => {
+          showBlit(ses.term, e);
+          //NOTE  getting selected from state because selected prop is stale
+          if (hasBell(e) && (useTermState.getState().selected !== name)) {
+            useTermState.getState().set((state) => {
+              state.sessions[name].hasBell = true;
+            });
+          }
+          //TODO  should handle %bye on this higher level though, for deletion
+        },
+        err: (e, id) => {
+          console.log(`subscription error, id ${id}:`, e);
+        },
+        quit: async () => {  //  quit
+          console.error('quit, reconnecting...');
+          try {
+            const newSubscriptionId = await retry(initSubscription, () => {
+              console.log('attempting to reconnect ...');
+            }, 5);
+            useTermState.getState().set((state) => {
+              state.sessions[name].subscriptionId = newSubscriptionId;
+            });
+          } catch (error) {
+            console.log('unable to reconnect', error);
+          }
+        }
+      });
+
+      return subscriptionId;
+    };
+
+    ses.subscriptionId = await initSubscription();
+
+    useTermState.getState().set((state) => {
+      state.sessions[name] = ses;
+    });
+  }, []);
+
+  const shouldResize = useCallback(() => {
+    if(!session) {
+      return false;
+    }
+
+    const containerHeight = document.querySelector('.buffer-container')?.clientHeight || Infinity;
+    const terminalHeight = session.term.element?.clientHeight || 0;
+
+    return (containerHeight - terminalHeight) >= RESIZE_THRESHOLD_PX;
+  }, [session]);
+
+  const onSelect = useCallback(async () => {
+    if (session && selected && shouldResize()) {
+      session.fit.fit();
+      await api.poke(pokeTask(name, { blew: { w: session.term.cols, h: session.term.rows } }));
+      session.term.focus();
+    }
+  }, [session?.term, selected]);
+
+  // Effects
+  // init session
+  useEffect(() => {
+    if(session) {
+      return;
+    }
+
+    initSession(name, dark);
+  }, [name]);
+
+  // attach to DOM when ref is available
+  useEffect(() => {
+    if(session && containerRef.current && !session.term.element) {
+      session.term.open(containerRef.current);
+    }
+  }, [session, containerRef]);
+
+  //  initialize resize listeners
+  //
+  useEffect(() => {
+    if(!session) {
+      return;
+    }
+
+    // TODO: use ResizeObserver for improved performance?
+    const debouncedResize =  debounce(() => onResize(name, session), RESIZE_DEBOUNCE_MS);
+    window.addEventListener('resize', debouncedResize);
+
+    return () => {
+      window.removeEventListener('resize', debouncedResize);
+    };
+  }, [session]);
+
+  //  on dark mode change, change terminals' theme
+  //
+  useEffect(() => {
+    const theme = makeTheme(dark);
+    if (session) {
+      session.term.options.theme = theme;
+    }
+    if (containerRef.current) {
+      containerRef.current.style.backgroundColor = theme.background || '';
+    }
+  }, [session, dark]);
+
+  // On select, resize, focus, and poke herm with updated cols and rows
+  useEffect(() => {
+    onSelect();
+  }, [onSelect]);
+
+  return (
+    !session && !selected ?
+      <p>Loading...</p>
+      :
+      <Box
+        width='100%'
+        height='100%'
+        bg='white'
+        fontFamily='mono'
+        overflow='hidden'
+        className="terminal-container"
+        style={selected ? { zIndex: 999 } : {}}
+      >
+        <Col
+          width='100%'
+          height='100%'
+          minHeight='0'
+          px={['0', '2']}
+          pb={['0', '2']}
+          ref={containerRef}
+        >
+        </Col>
+      </Box>
+  );
+}

pkg/interface/webterm/InfoButton.tsx

@@ -0,0 +1,24 @@
+import React, { useCallback } from 'react';
+import { Icon } from '@tlon/indigo-react';
+import { useDetectOS } from './lib/useDetectOS';
+
+export const InfoButton = () => {
+  const { isMacOS } = useDetectOS();
+
+  const onInfoClick = useCallback(() => {
+    const key = isMacOS ? 'alt' : 'shift';
+
+    alert(`To select text in the terminal, hold down the ${key} key.`);
+  }, [isMacOS]);
+
+  return (
+    <>
+      <button className="info-btn" onClick={onInfoClick}>
+        <Icon
+          icon="Info"
+          size="18px"
+        />
+      </button>
+    </>
+  );
+};

pkg/interface/webterm/Spinner.tsx

@@ -0,0 +1,55 @@
+import useIsMounted from './lib/useIsMounted';
+import React from 'react';
+import { useEffect, useState } from 'react';
+
+const DELAY_MS = 1000;
+const FRAME_MS = 250;
+const CHARS = '|/-\\';
+
+const Spinner = () => {
+  const [index, setIndex] = useState(0);
+  const [intervalTimer, setIntervalTimer] = useState<ReturnType<typeof setInterval> | undefined>();
+  const isMounted = useIsMounted();
+
+  useEffect(() => {
+    setIntervalTimer(
+      setInterval(() => {
+        if (isMounted()) {
+          setIndex(idx => idx === CHARS.length - 1 ? 0 : idx + 1);
+        }
+      }, FRAME_MS)
+    );
+
+    return () => {
+      if (intervalTimer) {
+        clearInterval(intervalTimer);
+      }
+    };
+  }, []);
+
+  return <span>&nbsp;{CHARS[index]}</span>;
+};
+
+export const DelayedSpinner = () => {
+  const [showSpinner, setShowSpinner] = useState(false);
+  const [delayTimer, setDelayTimer] = useState<ReturnType<typeof setTimeout> | undefined>();
+  const isMounted = useIsMounted();
+
+  useEffect(() => {
+    setDelayTimer(
+      setTimeout(() => {
+        if (isMounted()) {
+          setShowSpinner(true);
+        }
+      }, DELAY_MS)
+    );
+
+    return () => {
+      if (delayTimer) {
+        clearTimeout(delayTimer);
+      }
+    };
+  }, []);
+
+  return showSpinner ? <Spinner /> : null;
+};

pkg/interface/webterm/Tab.tsx

@@ -0,0 +1,55 @@
+import { DEFAULT_SESSION } from './constants';
+import React, { useCallback, useEffect } from 'react';
+import useTermState, { Session } from './state';
+import api from './api';
+import { pokeTask } from '@urbit/api/term';
+import { DelayedSpinner as Spinner } from './Spinner';
+
+interface TabProps {
+  session: Session;
+  name: string;
+}
+
+export const Tab = ( { session, name }: TabProps ) => {
+  const isSelected = useTermState().selected === name;
+
+  const onClick = () => {
+    useTermState.getState().set((state) => {
+      state.selected = name;
+      state.sessions[name].hasBell = false;
+    });
+  };
+
+  const onDelete = useCallback(async (e) => {
+    e.stopPropagation();
+
+    // clean up subscription
+    if(session && session.subscriptionId) {
+      await api.unsubscribe(session.subscriptionId);
+    }
+
+    // DELETE
+    await api.poke(pokeTask(name, { shut: null }));
+
+    // remove from zustand
+    useTermState.getState().set((state) => {
+      if (state.selected === name) {
+        state.selected = DEFAULT_SESSION;
+      }
+      state.names = state.names.filter(n => n !== name);
+      delete state.sessions[name];
+    });
+  }, [session]);
+
+  return (
+    <div className={'tab ' + (isSelected ? 'selected' : '')} onClick={onClick}>
+      <a className='session-name'>
+        {session?.hasBell ? '🔔 ' : ''}
+        {name === DEFAULT_SESSION ? 'default' : name}
+        {session && session.pending > 0 ? <Spinner /> : null}
+        {' '}
+      </a>
+      {name === DEFAULT_SESSION ? null : <a className="delete-session" onClick={onDelete}>x</a>}
+    </div>
+  );
+};

pkg/interface/webterm/Tabs.tsx

@@ -0,0 +1,26 @@
+import React from 'react';
+import useTermState from './state';
+import { Tab } from './Tab';
+import { useAddSession } from './lib/useAddSession';
+import { Icon } from '@tlon/indigo-react';
+
+export const Tabs = () => {
+  const { sessions, names } = useTermState();
+  const addSession = useAddSession();
+
+  return (
+    <div className="tabs">
+      {names.map((n, i) => {
+        return (
+          <Tab session={sessions[n]} name={n} key={i} />
+        );
+      })}
+      <button className="tab" onClick={addSession}>
+        <Icon
+          icon="Plus"
+          size="18px"
+        />
+      </button>
+    </div>
+  );
+};

pkg/interface/webterm/app.tsx

@@ -1,475 +0,0 @@
-/* eslint-disable max-lines */
-import React, {
-  useEffect,
-  useRef,
-  useCallback
-} from 'react';
-
-import useTermState from './state';
-import { useDark } from './join';
-import api from './api';
-
-import { Terminal, ITerminalOptions, ITheme } from 'xterm';
-import { FitAddon } from 'xterm-addon-fit';
-import { saveAs } from 'file-saver';
-
-import { Box, Col, Reset, _dark, _light } from '@tlon/indigo-react';
-
-import 'xterm/css/xterm.css';
-
-import {
-  Belt, Blit, Stye, Stub, Tint, Deco,
-  pokeTask, pokeBelt
-} from '@urbit/api/term';
-
-import bel from './lib/bel';
-import { ThemeProvider } from 'styled-components';
-
-type TermAppProps = {
-  ship: string;
-}
-
-const makeTheme = (dark: boolean): ITheme => {
-  let fg, bg: string;
-  if (dark) {
-    fg = 'white';
-    bg = 'rgb(26,26,26)';
-  } else {
-    fg = 'black';
-    bg = 'white';
-  }
-  // TODO  indigo colors.
-  //      we can't pluck these from ThemeContext because they have transparency.
-  //      technically xterm supports transparency, but it degrades performance.
-  return {
-    foreground: fg,
-    background: bg,
-    brightBlack: '#7f7f7f',  // NOTE  slogs
-    cursor: fg,
-    cursorAccent: bg,
-    selection: fg
-  };
-};
-
-const termConfig: ITerminalOptions = {
-  logLevel: 'warn',
-  //
-  convertEol: true,
-  //
-  rows: 24,
-  cols: 80,
-  scrollback: 10000,
-  //
-  fontFamily: '"Source Code Pro", "Roboto mono", "Courier New", monospace',
-  fontWeight: 400,
-  // NOTE  theme colors configured dynamically
-  //
-  bellStyle: 'sound',
-  bellSound: bel,
-  //
-  //  allows text selection by holding modifier (option, or shift)
-  macOptionClickForcesSelection: true,
-  //  prevent insertion of simulated arrow keys on-altclick
-  altClickMovesCursor: false
-};
-
-const csi = (cmd: string, ...args: number[]) => {
-  return '\x1b[' + args.join(';') + cmd;
-};
-
-const tint = (t: Tint) => {
-  switch (t) {
-    case null: return '9';
-    case 'k':  return '0';
-    case 'r':  return '1';
-    case 'g':  return '2';
-    case 'y':  return '3';
-    case 'b':  return '4';
-    case 'm':  return '5';
-    case 'c':  return '6';
-    case 'w':  return '7';
-    default:   return `8;2;${t.r%256};${t.g%256};${t.b%256}`;
-  }
-};
-
-const stye = (s: Stye) => {
-  let out = '';
-
-  //  text decorations
-  //
-  if (s.deco.length > 0) {
-    out += s.deco.reduce((decs: number[], deco: Deco) => {
-      /* eslint-disable max-statements-per-line */
-      switch (deco) {
-        case null: decs.push(0); return decs;
-        case 'br': decs.push(1); return decs;
-        case 'un': decs.push(4); return decs;
-        case 'bl': decs.push(5); return decs;
-        default: console.log('weird deco', deco); return decs;
-      }
-    }, []).join(';');
-  }
-
-  //  background color
-  //
-  if (s.back !== null) {
-    if (out !== '') {
-      out += ';';
-    }
-    out += '4';
-    out += tint(s.back);
-  }
-
-  //  foreground color
-  //
-  if (s.fore !== null) {
-    if (out !== '') {
-      out += ';';
-    }
-    out += '3';
-    out += tint(s.fore);
-  }
-
-  if (out === '') {
-    return out;
-  }
-  return '\x1b[' + out + 'm';
-};
-
-const showBlit = (term: Terminal, blit: Blit) => {
-  let out = '';
-
-  if ('bel' in blit) {
-    out += '\x07';
-  } else if ('clr' in blit) {
-    term.clear();
-    out += csi('u');
-  } else if ('hop' in blit) {
-    if (typeof blit.hop === 'number') {
-      out += csi('H', term.rows, blit.hop + 1);
-    } else {
-      out += csi('H', term.rows - blit.hop.r, blit.hop.c + 1);
-    }
-    out += csi('s');  //  save cursor position
-  } else if ('put' in blit) {
-    out += blit.put.join('');
-    out += csi('u');
-  } else if ('klr' in blit) {
-    //TODO  remove for new backend
-    {
-      out += csi('H', term.rows, 1);
-      out += csi('K');
-    }
-    out += blit.klr.reduce((lin: string, p: Stub) => {
-      lin += stye(p.stye);
-      lin += p.text.join('');
-      lin += csi('m', 0);
-      return lin;
-    }, '');
-    out += csi('u');
-  } else if ('nel' in blit) {
-    out += '\n';
-  } else if ('sag' in blit || 'sav' in blit) {
-    const sav = ('sag' in blit) ? blit.sag : blit.sav;
-    const name = sav.path.split('/').slice(-2).join('.');
-    const buff = Buffer.from(sav.file, 'base64');
-    const blob = new Blob([buff], { type: 'application/octet-stream' });
-    saveAs(blob, name);
-  } else if ('url' in blit) {
-    window.open(blit.url);
-  } else if ('wyp' in blit) {
-    out += '\r' + csi('K');
-    out += csi('u');
-  //
-  //TODO  remove for new backend
-  } else if ('lin' in blit) {
-    out += csi('H', term.rows, 1);
-    out += csi('K');
-    out += blit.lin.join('');
-  } else if ('mor' in blit) {
-    out += '\n';
-  } else {
-    console.log('weird blit', blit);
-  }
-
-  term.write(out);
-};
-
-// NOTE  should generally only be passed the default terminal session
-const showSlog = (term: Terminal, slog: string) => {
-  //  set scroll region to exclude the bottom line,
-  //  scroll up one line,
-  //  move cursor to start of the newly created whitespace,
-  //  set text to grey,
-  //  print the slog,
-  //  restore color, scroll region, and cursor.
-  //
-  term.write(csi('r', 1, term.rows - 1)
-           + csi('S', 1)
-           + csi('H', term.rows - 1, 1)
-           + csi('m', 90)
-           + slog
-           + csi('m', 0)
-           + csi('r')
-           + csi('u'));
-};
-
-const readInput = (term: Terminal, e: string): Belt[] => {
-  const belts: Belt[] = [];
-  let strap = '';
-
-  while (e.length > 0) {
-    let c = e.charCodeAt(0);
-
-    //  text input
-    //
-    if (c >= 32 && c !== 127) {
-      strap += e[0];
-      e = e.slice(1);
-      continue;
-    } else if ('' !== strap) {
-      belts.push({ txt: strap.split('') });
-      strap = '';
-    }
-
-    //  special keys/characters
-    //
-    if (0 === c) {
-      term.write('\x07');  //  bel
-    } else if (8 === c || 127 === c) {
-      belts.push({ bac: null });
-    } else if (13 === c) {
-      belts.push({ ret: null });
-    } else if (c <= 26) {
-      let k = String.fromCharCode(96 + c);
-      //NOTE  prevent remote shut-downs
-      if ('d' !== k) {
-        belts.push({ ctl: k });
-        //TODO  for new backend
-        // belts.push({ mod: { mod: 'ctl', key: k } });
-      }
-    }
-
-    //  escape sequences
-    //
-    if (27 === c) {  //  ESC
-      e = e.slice(1);
-      c = e.charCodeAt(0);
-      if (91 === c || 79 === c) {  //  [ or O
-        e = e.slice(1);
-        c = e.charCodeAt(0);
-        /* eslint-disable max-statements-per-line */
-        switch (c) {
-          case 65: belts.push({ aro: 'u' }); break;
-          case 66: belts.push({ aro: 'd' }); break;
-          case 67: belts.push({ aro: 'r' }); break;
-          case 68: belts.push({ aro: 'l' }); break;
-        //
-          case 77: {
-            const m = e.charCodeAt(1) - 31;
-            if (1 === m) {
-              const c = e.charCodeAt(2) - 32;
-              const r = e.charCodeAt(3) - 32;
-              //TODO  re-enable for new backend
-              // belts.push({ hit: { r: term.rows - r, c: c - 1 } });
-            }
-            e = e.slice(3);
-            break;
-          }
-        //
-          default: term.write('\x07'); break;  //  bel
-        }
-      } else if (c >= 97 && c <= 122) {  //  a <= c <= z
-        belts.push({ mod: { mod: 'met', key: e[0] } });
-      } else if (c === 46) {  //  .
-        belts.push({ mod: { mod: 'met', key: '.' } });
-      } else if (c === 8 || c === 127) {
-        belts.push({ mod: { mod: 'met', key: { bac: null } } });
-      } else {
-        term.write('\x07'); break;  //  bel
-      }
-    }
-
-    e = e.slice(1);
-  }
-  if ('' !== strap) {
-    belts.push({ txt: strap.split('') });
-    strap = '';
-  }
-  return belts;
-};
-
-export default function TermApp(props: TermAppProps) {
-  const container = useRef<HTMLDivElement>(null);
-  // TODO  allow switching of selected
-  const { sessions, selected, slogstream, set } = useTermState();
-  const session = sessions[selected];
-  const dark = useDark();
-
-  const setupSlog = useCallback(() => {
-    console.log('slog: setting up...');
-    let available = false;
-    const slog = new EventSource('/~_~/slog', { withCredentials: true });
-
-    slog.onopen = (e) => {
-      console.log('slog: opened stream');
-      available = true;
-    };
-
-    slog.onmessage = (e) => {
-      const session = useTermState.getState().sessions[''];
-      if (!session) {
-        console.log('default session mia!', 'slog:', slog);
-        return;
-      }
-      showSlog(session.term, e.data);
-    };
-
-    slog.onerror = (e) => {
-      console.error('slog: eventsource error:', e);
-      if (available) {
-        window.setTimeout(() => {
-          if (slog.readyState !== EventSource.CLOSED) {
-            return;
-          }
-          console.log('slog: reconnecting...');
-          setupSlog();
-        }, 10000);
-      }
-    };
-
-    set((state) => {
-      state.slogstream = slog;
-    });
-  }, [sessions]);
-
-  const onInput = useCallback((ses: string, e: string) => {
-    const term = useTermState.getState().sessions[ses].term;
-    const belts = readInput(term, e);
-    belts.map((b) => {  // NOTE  passing api.poke(pokeBelt makes `this` undefined!
-      //TODO  pokeBelt(ses, b);
-      api.poke({
-        app: 'herm',
-        mark: 'belt',
-        json: b
-      });
-    });
-  }, [sessions]);
-
-  const onResize = useCallback(() => {
-    // TODO  debounce, if it ever becomes a problem
-    session?.fit.fit();
-  }, [session]);
-
-  //  on-init, open slogstream
-  //
-  useEffect(() => {
-    if (!slogstream) {
-      setupSlog();
-    }
-    window.addEventListener('resize', onResize);
-    return () => {
-      // TODO  clean up subs?
-      window.removeEventListener('resize', onResize);
-    };
-  }, [onResize, setupSlog]);
-
-  //  on dark mode change, change terminals' theme
-  //
-  useEffect(() => {
-    const theme = makeTheme(dark);
-    for (const ses in sessions) {
-      sessions[ses].term.setOption('theme', theme);
-    }
-    if (container.current) {
-      container.current.style.backgroundColor = theme.background || '';
-    }
-  }, [dark, sessions]);
-
-  //  on selected change, maybe setup the term, or put it into the container
-  //
-  useEffect(() => {
-    let ses = session;
-    //  initialize terminal
-    //
-    if (!ses) {
-      //  set up terminal
-      //
-      const term = new Terminal(termConfig);
-      term.setOption('theme', makeTheme(dark));
-      const fit = new FitAddon();
-      term.loadAddon(fit);
-
-      //  start mouse reporting
-      //
-      term.write(csi('?9h'));
-
-      //  set up event handlers
-      //
-      term.onData(e => onInput(selected, e));
-      term.onBinary(e => onInput(selected, e));
-      term.onResize((e) => {
-        //TODO  re-enable once new backend lands
-        // api.poke(pokeTask(selected, { blew: { w: e.cols, h: e.rows } }));
-      });
-
-      ses = { term, fit };
-
-      //  open subscription
-      //
-      api.subscribe({ app: 'herm', path: '/session/'+selected+'/view',
-        event: (e) => {
-          const ses = useTermState.getState().sessions[selected];
-          if (!ses) {
-            console.log('on blit: no such session', selected, sessions, useTermState.getState().sessions);
-            return;
-          }
-          showBlit(ses.term, e);
-        },
-        quit: () => {  //  quit
-          // TODO  show user a message
-        }
-      });
-    }
-
-    if (container.current && !container.current.contains(ses.term.element || null)) {
-      ses.term.open(container.current);
-      ses.fit.fit();
-      ses.term.focus();
-    }
-
-    set((state) => {
-      state.sessions[selected] = ses;
-    });
-
-    return () => {
-      // TODO  unload term from container
-      //      but term.dispose is too powerful? maybe just empty the container?
-    };
-  }, [set, session, container]);
-
-  return (
-    <>
-      <ThemeProvider theme={dark ? _dark : _light}>
-        <Reset />
-        <Box
-          width='100%'
-          height='100%'
-          bg='white'
-          fontFamily='mono'
-          overflow='hidden'
-        >
-          <Col
-            width='100%'
-            height='100%'
-            minHeight='0'
-            px={['0','2']}
-            pb={['0','2']}
-            ref={container}
-          >
-          </Col>
-        </Box>
-      </ThemeProvider>
-    </>
-  );
-}

pkg/interface/webterm/constants.ts

@@ -0,0 +1,28 @@
+export const DEFAULT_SESSION = '';
+export const DEFAULT_HANDLER = 'hood';
+export const RESIZE_DEBOUNCE_MS = 100;
+export const RESIZE_THRESHOLD_PX = 15;
+
+/**
+ * Session ID validity:
+ *
+ * - must start with an alphabetical
+ * - can be composed of alphanumerics with hyphens
+ * - can be length 1 or longer
+ */
+export const SESSION_ID_REGEX = /(^[a-z]{1}[a-z\d-]*$)/;
+
+/**
+ * Open a session with a given agent using `[agent]![session_name]`
+ *
+ * For example:
+ * ```
+ * book!my-session
+ * ```
+ *
+ * This will create a new session in webterm for the `%book` agent.
+ *
+ * Note that the second capture group after the ! is composed of the session ID
+ * regex above.
+ */
+export const AGENT_SESSION_REGEX = /^([a-z]{1}[a-z\d-]*)!([a-z]{1}[a-z\d-]*$)/;

pkg/interface/webterm/index.html

@@ -23,10 +23,113 @@
     <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro&display=swap" rel="stylesheet">
     <style>
       body, #root {
-        height: 100vh;
+        height: 99vh; /* prevent scrollbar on outer frame */
         margin: 0;
         padding: 0;
       }
+
+      .buffer-container {
+        height: calc(100% - 40px);
+        position: relative;
+      }
+
+      .terminal-container {
+        position: absolute;
+        top: 0;
+      }
+
+      div.header {
+        display: grid;
+        grid-template-areas: "tabs info";
+        grid-template-columns: auto min-content;
+        grid-template-rows: auto;
+      }
+
+      div.info {
+        grid-area: info;
+      }
+
+      div.tabs {
+        grid-area: tabs;
+        height: 40px;
+        display: flex;
+        flex-flow: row nowrap;
+        justify-content: flex-start;
+        padding: 5px 5px 0 5px;
+        border-bottom: 1px solid black;
+        background-color: white;
+      }
+
+      div.tabs > * {
+        margin-left: 5px;
+        margin-right: 5px;
+        border: solid 1px black;
+        padding: 10px;
+        cursor: pointer;
+      }
+
+      div.tab, button.tab {
+        margin-bottom: -1px; /** To overlay the selected tab on the tabs container bottom border */
+        border-top-left-radius: 5px;
+        border-top-right-radius: 5px;
+        font-family: monospace;
+        font-size: 14px;
+        line-height: 18px;
+      }
+
+      div.tabs > div.selected {
+        border-bottom: white solid 1px;
+      }
+
+      div.tabs > div.selected > a.session-name {
+        font-weight: bold;
+      }
+
+      div.tabs > a.delete-session {
+        padding: 5px;
+      }
+
+      button.info-btn {
+        border: none;
+        border-bottom: solid black 1px;
+        background: transparent;
+        padding: 10px;
+        line-height: 10px;
+        cursor: pointer;
+      }
+
+      @media (prefers-color-scheme: dark) {
+        html {
+          background-color: rgb(26,26,26);
+        }
+
+        div.tabs {
+          background-color: rgb(26, 26, 26);
+          color: rgba(255, 255, 255, 0.9);
+          border-bottom-color: rgba(255, 255, 255, 0.9);
+        }
+
+        div.tab {
+          background-color: rgb(26, 26, 26);
+          color: rgba(255, 255, 255, 0.9);
+          border-color: rgba(255, 255, 255, 0.9);
+        }
+
+        button.tab {
+          background-color: rgb(42, 42, 42);
+          color: rgba(255, 255, 255, 0.9);
+          border-color: rgba(255, 255, 255, 0.9);
+        }
+
+        div.tabs > div.selected {
+          border-bottom: rgb(26,26,26) solid 1px;
+        }
+
+        button.info-btn {
+          border-bottom: solid rgba(255, 255, 255, 0.9) 1px;
+          background: rgb(26, 26, 26);
+        }  
+      }
     </style>
   </head>
   <body>

pkg/interface/webterm/lib/blit.ts

@@ -0,0 +1,129 @@
+import { Terminal } from 'xterm';
+import { saveAs } from 'file-saver';
+import { Blit, Stub, Stye } from '@urbit/api/term';
+import { stye } from '../lib/stye';
+
+export const csi = (cmd: string, ...args: number[]) => {
+  return '\x1b[' + args.join(';') + cmd;
+};
+
+export const showBlit = (term: Terminal, blit: Blit) => {
+  let out = '';
+
+  if ('mor' in blit) {
+    return blit.mor.map(b => showBlit(term, b));
+  } else if ('bel' in blit) {
+    out += '\x07';
+  } else if ('clr' in blit) {
+    term.clear();
+    out += csi('u');
+  } else if ('hop' in blit) {
+    if (typeof blit.hop === 'number') {
+      out += csi('H', term.rows, blit.hop + 1);
+    } else {
+      out += csi('H', blit.hop.y + 1, blit.hop.x + 1);
+    }
+    out += csi('s');  //  save cursor position
+  } else if ('put' in blit) {
+    out += blit.put.join('');
+    out += csi('u');
+  } else if ('klr' in blit) {
+    out += blit.klr.reduce((lin: string, p: Stub) => {
+      lin += stye(p.stye);
+      lin += p.text.join('');
+      lin += csi('m', 0);
+      return lin;
+    }, '');
+    out += csi('u');
+  } else if ('nel' in blit) {
+    out += '\n';
+  } else if ('sag' in blit || 'sav' in blit) {
+    const sav = ('sag' in blit) ? blit.sag : blit.sav;
+    const name = sav.path.split('/').slice(-2).join('.');
+    const buff = Buffer.from(sav.file, 'base64');
+    const blob = new Blob([buff], { type: 'application/octet-stream' });
+    saveAs(blob, name);
+  } else if ('url' in blit) {
+    window.open(blit.url);
+  } else if ('wyp' in blit) {
+    out += '\r' + csi('K');
+    out += csi('u');
+  //
+  } else {
+    console.log('weird blit', blit);
+  }
+
+  term.write(out);
+};
+
+export const showSlog = (term: Terminal, slog: string) => {
+  //  set scroll region to exclude the bottom line,
+  //  scroll up one line,
+  //  move cursor to start of the newly created whitespace,
+  //  set text to grey,
+  //  print the slog,
+  //  restore color, scroll region, and cursor.
+  //
+  term.write(csi('r', 1, term.rows - 1)
+           + csi('S', 1)
+           + csi('H', term.rows - 1, 1)
+           + csi('m', 90)
+           + slog
+           + csi('m', 0)
+           + csi('r')
+           + csi('u'));
+};
+
+export const hasBell = (blit: Blit) => {
+  if ('bel' in blit) {
+    return true;
+  } else if ('mor' in blit) {
+    return blit.mor.some(hasBell);
+  } else {
+    return false;
+  }
+};
+
+//  debug rendering
+//NOTE  doesn't behave nicely in the presence of eob %nel blits,
+//      because those aren't idempotent
+
+const blotStye: Stye = { deco: [], back: { r: 255, g: 0, b: 255 }, fore: 'k' };
+const blitToBlot = (blit: Blit): Blit => {
+  if ('mor' in blit) {
+    return { mor: blit.mor.map(blitToBlot) };
+  } else if ('put' in blit) {
+    return { klr: [{ text: blit.put, stye: blotStye }] };
+  } else if ('klr' in blit) {
+    return { klr: blit.klr.map((s: Stub) => {
+      return { text: s.text, stye: blotStye };
+    }) };
+  } else {
+    return blit;
+  }
+};
+
+const queue: {term: Terminal, blit: Blit}[] = [];
+const renderFromQueue = () => {
+  const next = queue.shift();
+  if (!next) {
+    return;
+  }
+  showBlit(next.term, next.blit);
+  if (0 === queue.length) {
+    return;
+  }
+  setTimeout(renderFromQueue, 200);
+};
+
+export const showBlitDebug = (term: Terminal, blit: Blit) => {
+  const blot = blitToBlot(blit);
+  if (0 === queue.length) {
+    showBlit(term, blot);
+    queue.push({ term, blit });
+    setTimeout(renderFromQueue, 200);
+  } else {
+    queue.push({ term, blit: blot });
+    queue.push({ term, blit });
+  }
+};

pkg/interface/webterm/lib/retry.ts

@@ -0,0 +1,39 @@
+/**
+ * Wait for the given milliseconds
+ * @param {number} milliseconds The given time to wait
+ * @returns {Promise} A fulfiled promise after the given time has passed
+ */
+ function waitFor(milliseconds) {
+  return new Promise(resolve => setTimeout(resolve, milliseconds));
+}
+
+/**
+ * Execute a promise and retry with exponential backoff
+ * based on the maximum retry attempts it can perform
+ * @param {Promise} promise promise to be executed
+ * @param {function} onRetry callback executed on every retry
+ * @param {number} maxRetries The maximum number of retries to be attempted
+ * @returns {Promise} The result of the given promise passed in
+ */
+export function retry(promise, onRetry, maxRetries) {
+  async function retryWithBackoff(retries) {
+    try {
+      if (retries > 0) {
+        const timeToWait = 2 ** retries * 100;
+        console.log(`waiting for ${timeToWait}ms...`);
+        await waitFor(timeToWait);
+      }
+      return await promise();
+    } catch (e) {
+      if (retries < maxRetries) {
+        onRetry();
+        return retryWithBackoff(retries + 1);
+      } else {
+        console.warn('Max retries reached. Bubbling the error up');
+        throw e;
+      }
+    }
+  }
+
+  return retryWithBackoff(0);
+}

pkg/interface/webterm/lib/stye.ts

@@ -0,0 +1,60 @@
+import { Deco, Stye, Tint } from '@urbit/api/term';
+
+const tint = (t: Tint) => {
+  switch (t) {
+    case null: return '9';
+    case 'k':  return '0';
+    case 'r':  return '1';
+    case 'g':  return '2';
+    case 'y':  return '3';
+    case 'b':  return '4';
+    case 'm':  return '5';
+    case 'c':  return '6';
+    case 'w':  return '7';
+    default:   return `8;2;${t.r%256};${t.g%256};${t.b%256}`;
+  }
+};
+
+export const stye = (s: Stye) => {
+  let out = '';
+
+  //  text decorations
+  //
+  if (s.deco.length > 0) {
+    out += s.deco.reduce((decs: number[], deco: Deco) => {
+      /* eslint-disable max-statements-per-line */
+      switch (deco) {
+        case null: decs.push(0); return decs;
+        case 'br': decs.push(1); return decs;
+        case 'un': decs.push(4); return decs;
+        case 'bl': decs.push(5); return decs;
+        default: console.log('weird deco', deco); return decs;
+      }
+    }, []).join(';');
+  }
+
+  //  background color
+  //
+  if (s.back !== null) {
+    if (out !== '') {
+      out += ';';
+    }
+    out += '4';
+    out += tint(s.back);
+  }
+
+  //  foreground color
+  //
+  if (s.fore !== null) {
+    if (out !== '') {
+      out += ';';
+    }
+    out += '3';
+    out += tint(s.fore);
+  }
+
+  if (out === '') {
+    return out;
+  }
+  return '\x1b[' + out + 'm';
+};

pkg/interface/webterm/lib/theme.ts

@@ -0,0 +1,23 @@
+import { ITheme } from 'xterm';
+
+export const makeTheme = (dark: boolean): ITheme => {
+  let fg, bg: string;
+  if (dark) {
+    fg = 'white';
+    bg = 'rgb(26,26,26)';
+  } else {
+    fg = 'black';
+    bg = 'white';
+  }
+  // TODO  indigo colors.
+  //      we can't pluck these from ThemeContext because they have transparency.
+  //      technically xterm supports transparency, but it degrades performance.
+  return {
+    foreground: fg,
+    background: bg,
+    brightBlack: '#7f7f7f',  // NOTE  slogs
+    cursor: fg,
+    cursorAccent: bg,
+    selection: fg
+  };
+};

pkg/interface/webterm/lib/useAddSession.ts

@@ -0,0 +1,66 @@
+import {
+  DEFAULT_HANDLER,
+  AGENT_SESSION_REGEX,
+  SESSION_ID_REGEX
+} from '../constants';
+import useTermState from '../state';
+import api from '../api';
+import { pokeTask } from '@urbit/api/term';
+import { useCallback } from 'react';
+
+export const useAddSession = () => {
+  const { names } = useTermState();
+
+  const addSession = useCallback(async () => {
+    let agent = DEFAULT_HANDLER;
+    let sessionName: string;
+
+    const userInput = prompt('Please enter an alpha-numeric session name.');
+    // user canceled or did not enter a value
+    if (null === userInput) {
+      return;
+    }
+
+    // check for custom agent session syntax
+    if (AGENT_SESSION_REGEX.test(userInput)) {
+      const match = AGENT_SESSION_REGEX.exec(userInput);
+      if (!match) {
+        alert('Invalid format. Valid syntax: agent!session-name');
+        return;
+      }
+      agent = match[1];
+      sessionName = match[2];
+    // else, use the default session creation regex
+    } else if (SESSION_ID_REGEX.test(userInput)) {
+      const match = SESSION_ID_REGEX.exec(userInput);
+      if (!match) {
+        alert('Invalid format. Valid syntax: session-name');
+        return;
+      }
+      sessionName = match[1];
+    } else {
+      alert('Invalid format. Valid syntax: session-name');
+      return;
+    }
+
+    // prevent duplicate sessions
+    if(names.includes(sessionName)) {
+      alert(`Session name must be unique ("${sessionName}" already in use)`);
+      return;
+    }
+
+    try {
+      //TODO  eventually, customizable app pre-linking?
+      await api.poke(pokeTask(sessionName, { open: { term: agent, apps: [{ who: '~' + (window as any).ship, app: 'dojo' }] } }));
+      useTermState.getState().set((state) => {
+        state.names = [sessionName, ...state.names].sort();
+        state.selected = sessionName;
+        state.sessions[sessionName] = null;
+      });
+    } catch (error) {
+      console.log('unable to create session:', error);
+    }
+  }, [names]);
+
+  return addSession;
+};

pkg/interface/webterm/lib/useDark.ts

@@ -1,6 +1,5 @@
 import { useEffect, useState } from 'react';
-import { useTheme } from './settings';
-import useTermState from './state';
+import useTermState from '../state';
 
 export function useDark() {
   const [osDark, setOsDark] = useState(false);
@@ -11,12 +10,11 @@ export function useDark() {
       setOsDark(e.matches);
     };
     setOsDark(themeWatcher.matches);
-    themeWatcher.addListener(update);
+    themeWatcher.addEventListener('change', update);
 
     return () => {
-      themeWatcher.removeListener(update);
-    }
-
+      themeWatcher.removeEventListener('change', update);
+    };
   }, []);
 
   const theme = useTermState(s => s.theme);

pkg/interface/webterm/lib/useDetectOS.ts

@@ -0,0 +1,44 @@
+/* eslint-disable no-useless-escape */
+// Regex patterns inspired by:
+// https://github.com/faisalman/ua-parser-js/blob/master/src/ua-parser.js
+const LINUX = [
+  /\b(joli|palm)\b ?(?:os)?\/?([\w\.]*)/i,
+  /(mint)[\/\(\) ]?(\w*)/i,
+  /(mageia|vectorlinux)[; ]/i,
+  /([kxln]?ubuntu|debian|suse|opensuse|gentoo|arch(?= linux)|slackware|fedora|mandriva|centos|pclinuxos|red ?hat|zenwalk|linpus|raspbian|plan 9|minix|risc os|contiki|deepin|manjaro|elementary os|sabayon|linspire)(?: gnu\/linux)?(?: enterprise)?(?:[- ]linux)?(?:-gnu)?[-\/ ]?(?!chrom|package)([-\w\.]*)/i,
+  /(hurd|linux) ?([\w\.]*)/i,
+  /(gnu) ?([\w\.]*)/i,
+  /\b([-frentopcghs]{0,5}bsd|dragonfly)[\/ ]?(?!amd|[ix346]{1,2}86)([\w\.]*)/i,
+  /(haiku) (\w+)/i,
+  /(sunos) ?([\w\.\d]*)/i,
+  /((?:open)?solaris)[-\/ ]?([\w\.]*)/i,
+  /(aix) ((\d)(?=\.|\)| )[\w\.])*/i,
+  /\b(beos|os\/2|amigaos|morphos|openvms|fuchsia|hp-ux)/i,
+  /(unix) ?([\w\.]*)/i
+];
+
+const MAC_OS = [
+  /(mac os x) ?([\w\. ]*)/i,
+  /(macintosh|mac_powerpc\b)(?!.+haiku)/i
+];
+
+const WINDOWS = [
+  /microsoft (windows) (vista|xp)/i,
+  /(windows) nt 6\.2; (arm)/i,
+  /(windows (?:phone(?: os)?|mobile))[\/ ]?([\d\.\w ]*)/i,
+  /(windows)[\/ ]?([ntce\d\. ]+\w)(?!.+xbox)/i
+];
+
+export const useDetectOS = () => {
+  const userAgent = navigator.userAgent;
+
+  const isLinux = LINUX.some(regex => regex.test(userAgent));
+  const isMacOS = MAC_OS.some(regex => regex.test(userAgent));
+  const isWindows = WINDOWS.some(regex => regex.test(userAgent));
+
+  return {
+    isLinux,
+    isMacOS,
+    isWindows
+  };
+};

pkg/interface/webterm/lib/useIsMounted.ts

@@ -0,0 +1,17 @@
+import { useCallback, useEffect, useRef } from 'react';
+
+function useIsMounted() {
+  const isMounted = useRef(false);
+
+  useEffect(() => {
+    isMounted.current = true;
+
+    return () => {
+      isMounted.current = false;
+    };
+  }, []);
+
+  return useCallback(() => isMounted.current, []);
+}
+
+export default useIsMounted;

pkg/interface/webterm/package.json

@@ -11,6 +11,7 @@
     "@urbit/api": "^1.1.1",
     "@urbit/http-api": "^1.2.1",
     "file-saver": "^2.0.5",
+    "lodash": "^4.17.21",
     "react": "^16.14.0",
     "react-dom": "^16.14.0",
     "react-router-dom": "^5.2.0",
@@ -36,7 +37,7 @@
     "@types/styled-system": "^5.1.10",
     "@typescript-eslint/eslint-plugin": "^4.15.0",
     "@typescript-eslint/parser": "^4.24.0",
-    "@urbit/eslint-config": "^1.0.0",
+    "@urbit/eslint-config": "^1.0.3",
     "@welldone-software/why-did-you-render": "^6.1.0",
     "babel-eslint": "^10.1.0",
     "babel-jest": "^26.6.3",
@@ -45,7 +46,9 @@
     "clean-webpack-plugin": "^3.0.0",
     "cross-env": "^7.0.3",
     "eslint": "^7.26.0",
-    "eslint-plugin-react": "^7.22.0",
+    "eslint-import-resolver-typescript": "^2.5.0",
+    "eslint-plugin-import": "^2.25.4",
+    "eslint-plugin-react-hooks": "^4.3.0",
     "file-loader": "^6.2.0",
     "html-webpack-plugin": "^4.5.1",
     "husky": "^6.0.0",
@@ -58,7 +61,8 @@
     "webpack-dev-server": "^3.11.2"
   },
   "scripts": {
-    "lint": "eslint ./src/**/*.{ts,tsx}",
+    "lint": "eslint ./**/*.{ts,tsx}",
+    "lint-fix": "eslint --fix ./**/*.{ts,tsx}",
     "lint-file": "eslint",
     "tsc": "tsc",
     "tsc:watch": "tsc --watch",

pkg/interface/webterm/state.ts

@@ -3,21 +3,33 @@ import { FitAddon } from 'xterm-addon-fit';
 import create from 'zustand';
 import produce from 'immer';
 
-type Session  = { term: Terminal, fit: FitAddon };
-type Sessions = { [id: string]: Session; }
+export type Session = {
+  term: Terminal,
+  fit: FitAddon,
+  hasBell: boolean,
+  pending: number,
+  subscriptionId: number | null,
+} | null;
+export type Sessions = { [id: string]: Session; }
 
 export interface TermState {
   sessions: Sessions,
+  names: string[],
   selected: string,
   slogstream: null | EventSource,
-  theme: 'auto' | 'light' | 'dark'
-};
+  theme: 'auto' | 'light' | 'dark',
+  //TODO: figure out the type
+  set: any,
+}
 
+// eslint-disable-next-line no-unused-vars
 const useTermState = create<TermState>((set, get) => ({
   sessions: {} as Sessions,
+  names: [''],
   selected: '',  //  empty string is default session
   slogstream: null,
   theme: 'auto',
+  // eslint-disable-next-line no-unused-vars
   set: (f: (draft: TermState) => void) => {
     set(produce(f));
   }

pkg/interface/webterm/tsconfig.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUnusedParameters": false,
+    "noImplicitReturns": false,
+    "moduleResolution": "node",
+    "esModuleInterop": true,
+    "noUnusedLocals": false,
+    "noImplicitAny": false,
+    "noEmit": true,
+    "target": "ESNext",
+    "module": "ESNext",
+    "strict": false,
+    "strictNullChecks": true,
+    "jsx": "react",
+    "baseUrl": "."
+  },
+  "include": [
+    "**/*"
+  ],
+  "exclude": [
+    "node_modules",
+    "dist"
+  ]
+}

pkg/landscape/app/chat-cli.hoon

@@ -16,15 +16,15 @@
 +$  card  card:shoe
 ::
 +$  versioned-state
-  $%  state-3
+  $%  state-4
+      state-3
       state-2
       state-1
       state-0
   ==
 ::
-+$  state-3
-  $:  %3
-      ::TODO  support multiple sessions
++$  state-4
+  $:  %4
       sessions=(map sole-id session)                ::  sole sessions
       bound=(map resource glyph)                    ::  bound resource glyphs
       binds=(jug glyph resource)                    ::  resource glyph lookup
@@ -33,7 +33,17 @@
       timez=(pair ? @ud)                            ::  timezone adjustment
   ==
 ::
-+$  sole-id  @ta
++$  state-3
+  $:  %3
+      sessions=(map @ta session)
+      bound=(map resource glyph)
+      binds=(jug glyph resource)
+      settings=(set term)
+      width=@ud
+      timez=(pair ? @ud)
+  ==
+::
++$  sole-id  sole-id:shoe
 +$  session
   $:  viewing=(set resource)                        ::  connected graphs
       history=(list uid:post)                       ::  scrollback pointers
@@ -115,7 +125,7 @@
   ==                                                ::
 ::
 --
-=|  state-3
+=|  state-4
 =*  state  -
 ::
 %-  agent:dbug
@@ -258,14 +268,14 @@
       settings  width  timez
     ==
   ::
-  =^  cards  u.old
+  =^  cards-1  u.old
     ?.  ?=(%2 -.u.old)  [~ u.old]
     :-  :~  [%pass /chat-store %agent [our-self %chat-store] %leave ~]
             [%pass /invites %agent [our.bowl %invite-store] %leave ~]
         ==
     ^-  state-3
     :-  %3
-    :*  %+  ~(put in *(map sole-id session))
+    :*  %+  ~(put in *(map @ta session))
           (cat 3 'drum_' (scot %p our.bowl))
         :*  ~  ~  0
           ::
@@ -290,14 +300,29 @@
         timez.u.old
     ==
   ::
-  ?>  ?=(%3 -.u.old)
+  =^  cards-2  u.old
+    ?.  ?=(%3 -.u.old)  [~ u.old]
+    :-  %+  turn  ~(tap in ~(key by sessions.u.old))
+        |=  id=@ta
+        ^-  card:agent:gall
+        [%give %kick ~[/sole/[id]] ~]
+    =-  u.old(- %4, sessions -)
+    %-  ~(gas by *(map sole-id session))
+    %+  murn  ~(tap by sessions.u.old)
+    |=  [id=@ta s=session]
+    (bind (upgrade-id:sole:shoe id) (late s))
+  ::
+  ?>  ?=(%4 -.u.old)
   :_  u.old
-  %+  welp
-    cards
-  ?:  %-  ~(has by wex.bowl)
-      [/graph-store our-self %graph-store]
-    ~
-  ~[connect]
+  ;:  welp
+    cards-1
+    cards-2
+  ::
+    ?:  %-  ~(has by wex.bowl)
+        [/graph-store our-self %graph-store]
+      ~
+    ~[connect]
+  ==
 ::  +connect: connect to the graph-store
 ::
 ++  connect

pkg/landscape/lib/dill.hoon

@@ -0,0 +1 @@
+../../base-dev/lib/dill.hoon

pkg/landscape/sys.kelvin

@@ -1 +1 @@
-[%zuse 417]
+[%zuse 416]

pkg/npm/api/README.md

@@ -24,7 +24,7 @@ With:
 import UrbitInterface from '@urbit/http-api';
 import { settings } from '@urbit/api';
 const api: UrbitInterface = useApi();
-api.poke(setings.putEntry(bucket, key, value));
+api.poke(settings.putEntry(bucket, key, value));
 ```
 
 You may import single functions
@@ -38,4 +38,4 @@ import { settings } from '@urbit/api';
 
 This package also provides types and utilities for working with Urbit's internal data structures, such as Nouns, Das, Tas, and so forth.
 
-This package was originally developed as part of Tlon's Landscape client and therefore the best reference material exists [there](https://github.com/urbit/urbit/tree/master/pkg/interface/src).
+This package was originally developed as part of Tlon's Landscape client and therefore the best reference material exists [there](https://github.com/urbit/urbit/tree/master/pkg/interface/src).

pkg/npm/api/term/lib.ts

@@ -1,4 +1,5 @@
-import { Poke } from '../lib'
+import { Scry } from '../../http-api/src'
+import { Poke } from '../../http-api/src/types';
 import { Belt, Task, SessionTask } from './types';
 
 export const pokeTask = (session: string, task: Task): Poke<SessionTask> => ({
@@ -13,9 +14,7 @@ export const pokeBelt = (
 ): Poke<SessionTask> => pokeTask(session, { belt });
 
 //NOTE  scry will return string[]
-// export const scrySessions = (): Scry => ({
-//   app: 'herm',
-//   path: `/sessions`
-// });
-//TODO  remove stub once new backend lands
-export const scrySessions = (): string[] => [''];
+export const scrySessions = (): Scry => ({
+  app: 'herm',
+  path: `/sessions`
+});

pkg/npm/api/term/types.ts

@@ -25,17 +25,15 @@ export type Stub = {
 export type Blit =
   | { bel: null }                                       //  make a noise
   | { clr: null }                                       //  clear the screen
-  | { hop: number | { r: number, c: number } }          //  set cursor col/pos
+  | { hop: number | { x: number, y: number } }          //  set cursor col/pos
   | { klr: Stub[] }                                     //  put styled
-  | { put: string[] }                                   //  put text at cursor
+  | { mor: Blit[] }                                     //  multiple blits
   | { nel: null }                                       //  newline
+  | { put: string[] }                                   //  put text at cursor
   | { sag: { path: string, file: string } }             //  save to jamfile
   | { sav: { path: string, file: string } }             //  save to file
   | { url: string }                                     //  activate url
   | { wyp: null }                                       //  wipe cursor line
-  //
-  | { lin: string[] }  //  legacy put
-  | { mor: true }  //  legacy nel
 
 //  inputs
 //
@@ -45,21 +43,19 @@ export type Bolt =
   | { aro: 'd' | 'l' | 'r' | 'u' }
   | { bac: null }
   | { del: null }
-  | { hit: { r: number, c: number } }
+  | { hit: { x: number, y: number } }
   | { ret: null }
 
 export type Belt =
   | Bolt
   | { mod: { mod: 'ctl' | 'met' | 'hyp', key: Bolt } }
   | { txt: Array<string> }
-  //
-  | { ctl: string };  //  legacy mod
 
 export type Task =
   | { belt: Belt }
   | { blew: { w: number, h: number } }
-  | { flow: { term: string, apps: Array<{ who: string, app: string }> } }
   | { hail: null }
-  | { hook: null }
+  | { open: { term: string, apps: Array<{ who: string, app: string }> } }
+  | { shut: null }
 
 export type SessionTask = { session: string } & Task

pkg/urbit/compat/posix/ptty.c

@@ -167,6 +167,9 @@ u3_ptty_init(uv_loop_t* lup_u, const c3_c** err_c)
 
   //  Construct raw termios configuration.
   //
+  //    makes input available per-character, does not echo input,
+  //    disables special input pre-processing, output post-processing.
+  //
   {
     pty_u->raw_u = pty_u->bak_u;
 

pkg/urbit/configure

@@ -211,7 +211,7 @@ for citem in $compat; do
 done
 
 cat >config.mk <<EOF
-CFLAGS  := $CFLAGS -funsigned-char -ffast-math -fcommon -std=gnu99
+CFLAGS  := $CFLAGS -funsigned-char -ffast-math -fcommon -std=gnu99 -Wno-format-zero-length
 LDFLAGS := $LDFLAGS
 CC      := ${CC-cc}
 compat  := $compat

pkg/urbit/daemon/main.c

@@ -572,7 +572,7 @@ _setup_cert_store()
 {
   BIO* cbio = BIO_new_mem_buf(include_ca_bundle_crt, include_ca_bundle_crt_len);
   if ( !cbio || !(_cert_store = PEM_X509_INFO_read_bio(cbio, NULL, NULL, NULL)) ) {
-    u3l_log("boot: failed to decode embedded CA certificates\r\n");
+    u3l_log("boot: failed to decode embedded CA certificates");
     exit(1);
   }
 
@@ -1267,7 +1267,7 @@ _cw_eval(c3_i argc, c3_c* argv[])
     }
     u3s_cue_xeno_done(sil_u);
     if ( c3n == u3v_boot_lite(pil) ) {
-      u3l_log("lite: boot failed\r\n");
+      u3l_log("lite: boot failed");
       exit(1);
     }
   }
@@ -1858,7 +1858,7 @@ _cw_vere(c3_i argc, c3_c* argv[])
   //  initialize curl
   //
   if ( 0 != curl_global_init(CURL_GLOBAL_DEFAULT) ) {
-    u3l_log("boot: curl initialization failed\r\n");
+    u3l_log("boot: curl initialization failed");
     exit(1);
   }
 
@@ -1888,11 +1888,11 @@ _cw_vere(c3_i argc, c3_c* argv[])
 
 
   if ( u3_king_vere(pac_c, ver_c, arc_c, dir_c, 0) ) {
-    u3l_log("vere: download failed\r\n");
+    u3l_log("vere: download failed");
     exit(1);
   }
 
-  u3l_log("vere: download succeeded\r\n");
+  u3l_log("vere: download succeeded");
 }
 
 /* _cw_vile(): generatoe/print keyfile
@@ -2138,7 +2138,7 @@ main(c3_i   argc,
     sigemptyset(&set);
     sigaddset(&set, SIGPROF);
     if ( 0 != pthread_sigmask(SIG_BLOCK, &set, NULL) ) {
-      u3l_log("boot: thread mask SIGPROF: %s\r\n", strerror(errno));
+      u3l_log("boot: thread mask SIGPROF: %s", strerror(errno));
       exit(1);
     }
   }
@@ -2230,7 +2230,7 @@ main(c3_i   argc,
     {
       SECURITY_ATTRIBUTES sa = {sizeof(sa), NULL, TRUE};
       if ( NULL == (u3_Host.cev_u = CreateEvent(&sa, FALSE, FALSE, NULL)) ) {
-        u3l_log("boot: failed to create Ctrl-C event: %d\r\n", GetLastError());
+        u3l_log("boot: failed to create Ctrl-C event: %d", GetLastError());
         exit(1);
       }
     }
@@ -2251,7 +2251,7 @@ main(c3_i   argc,
     //  initialize curl
     //
     if ( 0 != curl_global_init(CURL_GLOBAL_DEFAULT) ) {
-      u3l_log("boot: curl initialization failed\r\n");
+      u3l_log("boot: curl initialization failed");
       exit(1);
     }