6ad7ba1 · diagonal · git.iko.soy

git.iko.soy/diagonal

Register the native host with every Chromium browser

The installer now writes io.diagonal.host.json into the NativeMessagingHosts folder of every Chromium browser under ~/Library/Application Support (Chrome, Brave including Brave Origin, Edge, Vivaldi, Arc, Opera, and any other folder that looks like a Chromium profile), and --unregister removes them all. The extension skips tab-group work in browsers without chrome.tabGroups and says so in the popup. Wording changed from Brave to Chromium browsers. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LdKDAYoqmGehyHsV42LhJW

commit6ad7ba181cb727c5db5c0a10f74334a239d6b296 authorClaude <noreply@anthropic.com> dateWed 23 Sep 2026, 20:30 (2 weeks ago) parent4a50725

10 files changed+266−120

compare with master

unifiedsplit

README.md+14−14 flake.nix+9−8 host/diagonal-host.py+122 host/tests/test_host.py+59−1 scripts/install-manifest.sh+7−53 src/background/host.ts+3−2 src/background/index.ts+47−40 src/options/options.ts+2−1 src/popup/popup.ts+2 src/shared/url.ts+1−1

README.md+14−14

@@ -1,6 +1,6 @@

11# Diagonal

3−Dia-style tab groups for Brave on macOS, named by Apple's on-device model through the `fm` command-line tool over Chromium native messaging. No HTTP server, no cloud call, no model download.

3+Dia-style tab groups for Chromium browsers on macOS (Brave, Chrome, Edge, Vivaldi, Arc, Opera, …), named by Apple's on-device model through the `fm` command-line tool over Chromium native messaging. No HTTP server, no cloud call, no model download.

55You open and close tabs as usual. Diagonal does the rest on its own; there are no shortcuts and nothing to press.

@@ -16,7 +16,7 @@ The model sees a tab's title, address and `<meta name="description">`, and nothi

1616

1717## Requirements

1818

19−- Brave stable 1.95+ (Chromium 121+ APIs are used)

19+- A Chromium browser based on Chromium 121 or newer that lets extensions manage tab groups (`chrome.tabGroups`). Chrome, Brave (including Brave Origin), Edge and Chromium do. Browsers with their own tab grouping, such as Arc, Opera and Vivaldi, may not expose it; if so, Diagonal's popup says so and it stays idle.

2020- macOS 27 on Apple silicon, with Apple Intelligence on and the on-device model downloaded (`/usr/bin/fm` ships with macOS 27)

2121- Python 3 (standard library only) for the host

2222

@@ -28,23 +28,23 @@ The model sees a tab's title, address and `<meta name="description">`, and nothi

2828brew install iko-soy/tap/diagonal

2929```

3030

31−This downloads the latest release, puts the extension at `~/Library/Application Support/Diagonal/extension`, installs the native host and registers it with Brave.

31+This downloads the latest release, puts the extension at `~/Library/Application Support/Diagonal/extension`, installs the native host and registers it with every Chromium browser on the Mac.

3232

3333Apple's `fm` tool refuses to run until its terms are accepted once per Mac. If they aren't yet, the install shows them (through `sudo fm license`, so it asks for your password) and you agree or decline there. If you decline, the install still finishes and tells you to run `sudo fm license` when you're ready; until then Diagonal's popup says the same. The install ends with "Diagonal's host is ready." once everything works.

3434

35−Then load the extension in Brave once:

35+Then load the extension once, in each browser you use:

3636

37−1. Open `brave://extensions` and turn on **Developer mode**.

37+1. Open `chrome://extensions` (it works in Brave, Edge and the rest too) and turn on **Developer mode**.

38382. Click **Load unpacked**, press **Cmd+Shift+G** and paste `~/Library/Application Support/Diagonal/extension`.

3939

40−To update: `brew upgrade --cask --greedy diagonal`, then click reload on Diagonal at `brave://extensions`. `brew uninstall diagonal` removes the extension folder, the host and its Brave manifest; `brew uninstall --zap diagonal` also removes the fm schemas and logs.

40+To update: `brew upgrade --cask --greedy diagonal`, then click reload on Diagonal at `chrome://extensions`. `brew uninstall diagonal` removes the extension folder, the host and its manifests from every browser; `brew uninstall --zap diagonal` also removes the fm schemas and logs.

4141

42−Brave only installs extensions on its own from the Chrome Web Store, so the one Load unpacked step stays until Diagonal is published there.

42+Chromium browsers only install extensions on their own from a web store, so the one Load unpacked step stays until Diagonal is published there.

4343

4444### From a release zip

4545

46461. Download `diagonal-extension-<version>.zip` from the [latest release](https://github.com/iko-soy/diagonal/releases/latest) and unzip it somewhere it can stay, for example `~/Applications/Diagonal`.

47−2. Open `brave://extensions`, turn on **Developer mode**, click **Load unpacked** and pick that folder.

47+2. Open `chrome://extensions`, turn on **Developer mode**, click **Load unpacked** and pick that folder.

48483. Install the native host once, from Terminal:

4949

5050 ```sh

@@ -52,7 +52,7 @@ Brave only installs extensions on its own from the Chrome Web Store, so the one

5252 ```

5353

5454 (Type `bash `, then drag `install-host.command` from the folder into the Terminal window.) If it says python3 is not set up, run `xcode-select --install` and try again. It shows Apple's terms for `fm` if they haven't been accepted on this Mac yet, and ends with "Diagonal's host is ready." when everything works.

55−4. Open Diagonal's settings and click **Run self-test**. Brave does not need a restart.

55+4. Open Diagonal's settings and click **Run self-test**. The browser does not need a restart.

5656

5757The zip carries the host (`host/`), `extension-id` and `install-host.command`, which is the same script as `scripts/install-manifest.sh`. When you update to a newer release, rerun step 3.

5858

@@ -61,7 +61,7 @@ The zip carries the host (`host/`), `extension-id` and `install-host.command`, w

6161#### 1. The extension

6262

63631. `npm ci && npm run build` writes the unpacked extension to `dist/`.

64−2. Open `brave://extensions`, turn on **Developer mode**, click **Load unpacked** and pick `dist/`.

64+2. Open `chrome://extensions`, turn on **Developer mode**, click **Load unpacked** and pick `dist/`.

65653. Check that the ID shown is `mpnodlalikgeehnlnofdkpgapkmbkjdf`. It is pinned by the `key` in `manifest.json`, so it stays the same across reloads and machines.

6666

6767#### 2. The native host

@@ -69,10 +69,10 @@ The zip carries the host (`host/`), `extension-id` and `install-host.command`, w

6969Without Nix:

7070

7171```sh

72−scripts/install-manifest.sh # add --beta / --nightly / --all-channels for other Brave channels

72+scripts/install-manifest.sh

7373```

7474

75−This copies `host/` to `~/.local/share/diagonal-host`, links `~/.local/bin/diagonal-host`, pins its shebang to your `python3`, writes `~/Library/Application Support/BraveSoftware/Brave-Browser/NativeMessagingHosts/io.diagonal.host.json`, runs `diagonal-host --install-schemas`, then `diagonal-host --selftest`.

75+This copies `host/` to `~/.local/share/diagonal-host`, links `~/.local/bin/diagonal-host`, pins its shebang to your `python3`, runs `diagonal-host --register`, which writes `io.diagonal.host.json` into the `NativeMessagingHosts` folder of every Chromium browser's profile folder under `~/Library/Application Support` (known ones such as `Google/Chrome`, `BraveSoftware/Brave-Origin`, `Microsoft Edge`, `Arc/User Data`, plus any other folder with a Chromium `Local State` and browsing history) and checks each one the way the browser reads it, then runs `diagonal-host --install-schemas`, then `diagonal-host --selftest`.

7676

7777With Nix (nix-darwin + home-manager):

7878

@@ -83,7 +83,7 @@ diagonal.url = "path:/path/to/diagonal"; # or a git URL once it lives in a rep

8383# home-manager config

8484imports = [ inputs.diagonal.homeManagerModules.default ];

8585programs.diagonal.enable = true;

86−# programs.diagonal.channels = [ "Brave-Browser" "Brave-Browser-Beta" ];

86+# programs.diagonal.browsers = [ "BraveSoftware/Brave-Origin" "Google/Chrome" ];

8787```

8888

8989`nix build .#extension` builds `dist/` into `./result`; `nix build .#diagonal-host` builds the host.

@@ -125,7 +125,7 @@ Every push to `master` runs `.github/workflows/release.yml`: it typechecks, runs

125125- **Grey is reserved for the Parked group.** Site colours hash over the other eight colours.

126126- **Organize only adds tabs to Diagonal's own groups,** not to groups you made by hand, unless "Name my own groups" is on.

127127- **An Organize group whose title fails validation is still created,** with the hostname as a placeholder, and the naming loop names it.

128−- **Restarts.** Tab and group IDs change when Brave restarts, so records are matched to live groups by title and colour, which keeps managed groups managed.

128+- **Restarts.** Tab and group IDs change when the browser restarts, so records are matched to live groups by title and colour, which keeps managed groups managed.

129129

130130## Not verified on a real Mac yet

131131

flake.nix+9−8

@@ -63,26 +63,27 @@

6363 in

6464 {

6565 options.programs.diagonal = {

66− enable = lib.mkEnableOption "the Diagonal native messaging host for Brave";

66+ enable = lib.mkEnableOption "the Diagonal native messaging host for Chromium browsers";

6767 extensionId = lib.mkOption {

6868 type = lib.types.str;

6969 default = extensionId;

7070 description = "Pinned extension ID (from scripts/gen-key.sh). The host itself checks the ID baked into host/diagonal-host.py, so change both together by re-running gen-key.sh.";

7171 };

72− channels = lib.mkOption {

73− type = lib.types.listOf (lib.types.enum [ "Brave-Browser" "Brave-Browser-Beta" "Brave-Browser-Nightly" ]);

74− default = [ "Brave-Browser" ];

75− description = "Brave channels to install the host manifest for.";

72+ browsers = lib.mkOption {

73+ type = lib.types.listOf lib.types.str;

74+ default = [ "BraveSoftware/Brave-Browser" ];

75+ example = [ "BraveSoftware/Brave-Origin" "Google/Chrome" "Microsoft Edge" "Arc/User Data" ];

76+ description = "Browser profile folders under ~/Library/Application Support to install the host manifest into.";

7677 };

7778 };

7879

7980 config = lib.mkIf cfg.enable {

8081 home.packages = [ host ];

8182 home.file = lib.listToAttrs (map

82− (ch: lib.nameValuePair

83− "Library/Application Support/BraveSoftware/${ch}/NativeMessagingHosts/io.diagonal.host.json"

83+ (dir: lib.nameValuePair

84+ "Library/Application Support/${dir}/NativeMessagingHosts/io.diagonal.host.json"

8485 { text = builtins.toJSON manifest; })

85− cfg.channels);

86+ cfg.browsers);

8687 # `|| true`: a Mac without Apple Intelligence still activates.

8788 home.activation.diagonalSchemas = lib.hm.dag.entryAfter [ "writeBoundary" ] ''

8889 ${host}/bin/diagonal-host --install-schemas || true

host/diagonal-host.py+122

@@ -449,6 +449,124 @@ def selftest():

449449 return 0 if failures == 0 else 1

450450

451451

452+# ----- registering with browsers ------------------------------------------------------------------

453+

454+# Chromium reads per-user host manifests from <user data dir>/NativeMessagingHosts. Known user data

455+# dirs under ~/Library/Application Support; anything else that looks like a Chromium browser profile

456+# is found by browser_dirs()' scan.

457+KNOWN_BROWSER_DIRS = [

458+ "Google/Chrome", "Google/Chrome Beta", "Google/Chrome Dev", "Google/Chrome Canary", "Chromium",

459+ "BraveSoftware/Brave-Browser", "BraveSoftware/Brave-Origin", "BraveSoftware/Brave-Browser-Beta",

460+ "BraveSoftware/Brave-Browser-Nightly", "Microsoft Edge", "Microsoft Edge Beta", "Microsoft Edge Dev",

461+ "Microsoft Edge Canary", "Vivaldi", "Vivaldi Snapshot", "Arc/User Data", "Dia/User Data",

462+ "com.operasoftware.Opera", "com.operasoftware.OperaGX", "Thorium", "net.imput.helium", "Yandex/YandexBrowser",

463+]

464+BROWSER_SCAN_DEPTH = 3

465+REGISTERED_LIST = "registered-browsers.txt" # next to the host: where --register wrote manifests

466+

467+

468+def app_support():

469+ return os.environ.get("DIAGONAL_APP_SUPPORT", os.path.expanduser("~/Library/Application Support"))

470+

471+

472+def looks_like_browser(user_data_dir):

473+ """A Chromium browser's user data dir: `Local State` plus a profile with browsing data.

474+ Electron apps also have `Local State`, but no History, Favicons or Top Sites."""

475+ if not os.path.isfile(os.path.join(user_data_dir, "Local State")):

476+ return False

477+ try:

478+ profiles = [e for e in os.listdir(user_data_dir) if e == "Default" or e.startswith("Profile ")]

479+ except OSError:

480+ return False

481+ return any(os.path.exists(os.path.join(user_data_dir, p, f)) for p in profiles for f in ("History", "Favicons", "Top Sites"))

482+

483+

484+def browser_dirs():

485+ base = app_support()

486+ found = [os.path.join(base, rel) for rel in KNOWN_BROWSER_DIRS if os.path.isdir(os.path.join(base, rel))]

487+ for root, dirs, _files in os.walk(base):

488+ depth = os.path.relpath(root, base).count(os.sep) + (root != base)

489+ if root != base and (root in found or looks_like_browser(root)):

490+ if root not in found:

491+ found.append(root)

492+ dirs[:] = [] # profiles inside need no scan

493+ continue

494+ if depth >= BROWSER_SCAN_DEPTH or os.path.basename(root) == "Diagonal":

495+ dirs[:] = []

496+ return sorted(set(found))

497+

498+

499+def manifest_problems(path, host_path):

500+ try:

501+ m = json.load(open(path, encoding="utf-8"))

502+ except (OSError, ValueError) as e:

503+ return [f"unreadable ({e})"]

504+ problems = []

505+ if m.get("name") != HOST_NAME:

506+ problems.append(f"name is {m.get('name')!r}")

507+ if m.get("path") != host_path or not os.path.isabs(host_path):

508+ problems.append(f"path is {m.get('path')!r}")

509+ elif not os.access(host_path, os.X_OK):

510+ problems.append(f"host {host_path} is missing or not executable")

511+ if m.get("allowed_origins") != [ALLOWED_ORIGIN]:

512+ problems.append(f"allowed_origins is {m.get('allowed_origins')}")

513+ return problems

514+

515+

516+def register(host_path):

517+ """Write this host's manifest into every Chromium browser's NativeMessagingHosts folder, check each

518+ one the way the browser will read it, and remember where they went for --unregister."""

519+ host_path = os.path.abspath(host_path)

520+ body = json.dumps(manifest_for(host_path), indent=2) + "\n"

521+ dirs = browser_dirs()

522+ if not dirs:

523+ print("No Chromium browser found. Open your browser once, then run this again.", file=sys.stderr)

524+ return 1

525+ written, failures = [], 0

526+ for d in dirs:

527+ target_dir = os.path.join(d, "NativeMessagingHosts")

528+ target = os.path.join(target_dir, f"{HOST_NAME}.json")

529+ try:

530+ os.makedirs(target_dir, exist_ok=True)

531+ with open(target + ".tmp", "w", encoding="utf-8") as f:

532+ f.write(body)

533+ os.replace(target + ".tmp", target) # a browser never reads a half-written file

534+ except OSError as e:

535+ print(f" {os.path.relpath(d, app_support())}: could not write ({e})", file=sys.stderr)

536+ failures += 1

537+ continue

538+ problems = manifest_problems(target, host_path)

539+ if problems:

540+ print(f" {os.path.relpath(d, app_support())}: {'; '.join(problems)}", file=sys.stderr)

541+ failures += 1

542+ else:

543+ print(f"registered: {os.path.relpath(d, app_support())}")

544+ written.append(target)

545+ try:

546+ with open(os.path.join(os.path.dirname(os.path.realpath(__file__)), REGISTERED_LIST), "w", encoding="utf-8") as f:

547+ f.write("\n".join(written) + "\n")

548+ except OSError:

549+ pass

550+ return 1 if failures else 0

551+

552+

553+def unregister():

554+ """Remove every manifest --register wrote, plus any other copy of ours a browser folder still has."""

555+ listed = []

556+ try:

557+ listed = open(os.path.join(os.path.dirname(os.path.realpath(__file__)), REGISTERED_LIST), encoding="utf-8").read().split("\n")

558+ except OSError:

559+ pass

560+ candidates = set(filter(None, listed)) | {os.path.join(d, "NativeMessagingHosts", f"{HOST_NAME}.json") for d in browser_dirs()}

561+ for path in sorted(candidates):

562+ try:

563+ os.remove(path)

564+ print(f"removed: {path}")

565+ except OSError:

566+ pass

567+ return 0

568+

569+

452570def manifest_for(path):

453571 return {"name": HOST_NAME, "description": "Diagonal: names tab groups with Apple's on-device model",

454572 "path": os.path.abspath(path), "type": "stdio", "allowed_origins": [ALLOWED_ORIGIN]}

@@ -464,6 +582,10 @@ def main(argv=None):

464582 return selftest()

465583 if argv and argv[0] == "--install-schemas":

466584 return install_schemas()

585+ if argv and argv[0] == "--register":

586+ return register(argv[1] if len(argv) > 1 else sys.argv[0])

587+ if argv and argv[0] == "--unregister":

588+ return unregister()

467589 if argv and argv[0] == "--print-manifest":

468590 print(json.dumps(manifest_for(argv[1] if len(argv) > 1 else os.path.realpath(__file__)), indent=2))

469591 return 0

host/tests/test_host.py+59−1

@@ -2,10 +2,13 @@ import io

22import json

33import os

44import re

5+import shutil

56import struct

7+import subprocess

8+import sys

69import unittest

710

8−from support import HOST_DIR, ITEMS3, HostCase, frame, host, unframe

11+from support import HOST_DIR, HOST_SCRIPT, ITEMS3, HostCase, frame, host, unframe

912

1013

1114class Framing(HostCase):

@@ -287,6 +290,61 @@ class InstallSchemas(HostCase):

287290 self.assertEqual(len(self.argv_log()), 1) # stopped after the first refusal

288291

289292

293+class Register(HostCase):

294+ def make_profile(self, rel, browsing=True):

295+ d = os.path.join(self.tmp, "appsupport", rel)

296+ os.makedirs(os.path.join(d, "Default"))

297+ open(os.path.join(d, "Local State"), "w").write("{}")

298+ if browsing:

299+ open(os.path.join(d, "Default", "History"), "w").write("")

300+ return d

301+

302+ def setUp(self):

303+ super().setUp()

304+ self.env["DIAGONAL_APP_SUPPORT"] = os.path.join(self.tmp, "appsupport")

305+ self.host_copy = os.path.join(self.tmp, "bin", "diagonal-host.py")

306+ os.makedirs(os.path.dirname(self.host_copy))

307+ shutil.copy(HOST_SCRIPT, self.host_copy)

308+ for f in ("prompts.py", "validate.py", "emoji.txt"):

309+ shutil.copy(os.path.join(HOST_DIR, f), os.path.dirname(self.host_copy))

310+

311+ def run_copy(self, *args):

312+ return subprocess.run([sys.executable, self.host_copy, *args], capture_output=True, text=True, env=self.env, timeout=30)

313+

314+ def test_registers_with_every_chromium_browser_and_only_those(self):

315+ origin = self.make_profile("BraveSoftware/Brave-Origin")

316+ chrome = self.make_profile("Google/Chrome")

317+ arc = self.make_profile("Arc/User Data")

318+ unknown = self.make_profile("SomeVendor/NewBrowser")

319+ electron = self.make_profile("Slack", browsing=False)

320+ p = self.run_copy("--register", self.host_copy)

321+ self.assertEqual(p.returncode, 0, p.stderr)

322+ for d in (origin, chrome, arc, unknown):

323+ m = json.load(open(os.path.join(d, "NativeMessagingHosts", "io.diagonal.host.json")))

324+ self.assertEqual(m["path"], self.host_copy)

325+ self.assertEqual(m["allowed_origins"], [host.ALLOWED_ORIGIN])

326+ self.assertFalse(os.path.exists(os.path.join(electron, "NativeMessagingHosts")))

327+ self.assertIn("registered: BraveSoftware/Brave-Origin", p.stdout)

328+

329+ p = self.run_copy("--unregister")

330+ self.assertEqual(p.returncode, 0, p.stderr)

331+ for d in (origin, chrome, arc, unknown):

332+ self.assertFalse(os.path.exists(os.path.join(d, "NativeMessagingHosts", "io.diagonal.host.json")))

333+

334+ def test_names_a_host_that_cannot_run(self):

335+ self.make_profile("Google/Chrome")

336+ os.chmod(self.host_copy, 0o644)

337+ p = self.run_copy("--register", self.host_copy)

338+ self.assertEqual(p.returncode, 1)

339+ self.assertIn("missing or not executable", p.stderr)

340+

341+ def test_no_browser_found(self):

342+ os.makedirs(self.env["DIAGONAL_APP_SUPPORT"])

343+ p = self.run_copy("--register", self.host_copy)

344+ self.assertEqual(p.returncode, 1)

345+ self.assertIn("No Chromium browser found", p.stderr)

346+

347+

290348class SelfTest(HostCase):

291349 def test_selftest_passes_with_a_working_fm(self):

292350 self.respond(json.dumps({"title": "Rust async runtimes", "emoji": "🦀"}))

scripts/install-manifest.sh+7−53

@@ -3,8 +3,8 @@

33# scripts/install-manifest.sh [--beta] [--nightly] [--all-channels]

44# The release zip ships this same script as install-host.command next to host/ and extension-id,

55# so `bash install-host.command` works from the unzipped extension folder too.

6−# Copies host/ to ~/.local/share/diagonal-host, links ~/.local/bin/diagonal-host to it, writes the Brave

7−# host manifest with that absolute path and the pinned extension ID, then installs the fm schemas

6+# Copies host/ to ~/.local/share/diagonal-host, links ~/.local/bin/diagonal-host to it, registers the host

7+# (absolute path, pinned extension ID) with every Chromium browser on this Mac, then installs the fm schemas

88# and runs the self-test. Safe to re-run.

99set -euo pipefail

1010# Keep a copy of this run's output for diagnosis (brew's own output scrolls away).

@@ -17,22 +17,13 @@ trap 'echo "Diagonal host install failed at line $LINENO: $BASH_COMMAND" >&2' ER

1717HERE="$(cd "$(dirname "$0")" && pwd)"

1818if [[ -d "$HERE/host" ]]; then cd "$HERE"; else cd "$HERE/.."; fi

1919

20−CHANNELS=("Brave-Browser")

20+# (--beta, --nightly and --all-channels are accepted for old scripts; every browser is registered now.)

2121for arg in "$@"; do

2222 case "$arg" in

23− --beta) CHANNELS+=("Brave-Browser-Beta") ;;

24− --nightly) CHANNELS+=("Brave-Browser-Nightly") ;;

25− --all-channels) CHANNELS=("Brave-Browser" "Brave-Browser-Beta" "Brave-Browser-Nightly") ;;

23+ --beta|--nightly|--all-channels) ;;

2624 *) echo "unknown option: $arg" >&2; exit 2 ;;

2725 esac

2826done

29−# Also register with every other Brave channel that has been run on this Mac (Beta, Nightly),

30−# since each one reads host manifests from its own folder.

31−for ch in Brave-Browser-Beta Brave-Browser-Nightly; do

32− if [[ -d "$HOME/Library/Application Support/BraveSoftware/$ch" && " ${CHANNELS[*]} " != *" $ch "* ]]; then

33− CHANNELS+=("$ch")

34− fi

35−done

3627

3728ID=$(tr -d '[:space:]' < extension-id 2>/dev/null || true)

3829if [[ -z "$ID" ]]; then

@@ -59,47 +50,10 @@ xattr -dr com.apple.quarantine "$SHARE" 2>/dev/null || true

5950ln -sf "$SHARE/diagonal-host.py" "$BIN"

6051echo "host: $BIN -> $SHARE/diagonal-host.py"

6152

62−# Written here rather than by the host, so a python3 problem cannot leave an empty manifest behind,

63−# and moved into place so Brave never reads a half-written one.

64−MANIFEST=$(cat <<JSON

65−{

66− "name": "io.diagonal.host",

67− "description": "Diagonal: names tab groups with Apple's on-device model",

68− "path": "$BIN",

69− "type": "stdio",

70− "allowed_origins": ["chrome-extension://$ID/"]

71−}

72−JSON

73−)

7453"$BIN" --version >/dev/null # the host must start with the python3 it was pinned to

75−for ch in "${CHANNELS[@]}"; do

76− DIR="$HOME/Library/Application Support/BraveSoftware/$ch/NativeMessagingHosts"

77− mkdir -p "$DIR"

78− printf '%s\n' "$MANIFEST" > "$DIR/io.diagonal.host.json.tmp"

79− mv -f "$DIR/io.diagonal.host.json.tmp" "$DIR/io.diagonal.host.json"

80− echo "manifest: $DIR/io.diagonal.host.json"

81−done

82−

83−# Check what Brave will check, so a problem is named here instead of as "host not found" later.

84−for ch in "${CHANNELS[@]}"; do

85− "$PYTHON" - "$HOME/Library/Application Support/BraveSoftware/$ch/NativeMessagingHosts/io.diagonal.host.json" "$ID" <<'PY'

86−import json, os, sys

87−path, ext_id = sys.argv[1], sys.argv[2]

88−m = json.load(open(path))

89−problems = []

90−if m.get("name") != "io.diagonal.host":

91− problems.append(f"name is {m.get('name')!r}")

92−host = m.get("path", "")

93−if not os.path.isabs(host):

94− problems.append(f"path {host!r} is not absolute")

95−elif not os.access(host, os.X_OK):

96− problems.append(f"host {host} is missing or not executable")

97−if m.get("allowed_origins") != [f"chrome-extension://{ext_id}/"]:

98− problems.append(f"allowed_origins is {m.get('allowed_origins')}")

99−if problems:

100− sys.exit("manifest check failed for " + path + ": " + "; ".join(problems))

101−PY

102−done

54+# Writes the manifest into every Chromium browser's NativeMessagingHosts folder (Chrome, Brave and

55+# Brave Origin, Edge, Vivaldi, Arc, Opera, …) and checks each one the way the browser reads it.

56+"$BIN" --register "$BIN"

10357

10458FM="${DIAGONAL_FM:-/usr/bin/fm}"

10559

src/background/host.ts+3−2

@@ -2,7 +2,8 @@ import type { HostError, HostErrorCode } from "./state";

33/** Section 8's wire protocol, from the extension's side. One `sendNativeMessage` per request. */

44export const HOST_NAME = "io.diagonal.host";

5−export const HOST_MANIFEST_DIR = "~/Library/Application Support/BraveSoftware/Brave-Browser/NativeMessagingHosts/";

5+/** Each Chromium browser reads its own folder, e.g. Google/Chrome, BraveSoftware/Brave-Origin, Microsoft Edge. */

6+export const HOST_MANIFEST_DIR = "~/Library/Application Support/<browser>/NativeMessagingHosts/";

67export const HOST_MANIFEST_PATH = `${HOST_MANIFEST_DIR}${HOST_NAME}.json`;

89export type Op = "ping" | "name" | "organize";

@@ -111,7 +112,7 @@ export function explain(error: HostError | undefined, extensionId = ""): string

111112 if (!error) return "";

112113 switch (error.code) {

113114 case "HOST_NOT_FOUND":

114− return `Native host not installed (no manifest at ${HOST_MANIFEST_PATH}). Installed with Homebrew? Run: brew reinstall diagonal. Otherwise run: bash <the Diagonal folder>/install-host.command`;

115+ return `Native host not installed for this browser (no manifest at ${HOST_MANIFEST_PATH}). Installed with Homebrew? Run: brew reinstall diagonal. Otherwise run: bash <the Diagonal folder>/install-host.command. Either one registers the host with every Chromium browser on this Mac.`;

115116 case "HOST_FORBIDDEN":

116117 case "FORBIDDEN_ORIGIN":

117118 return `The host does not allow this extension. Its manifest needs "allowed_origins": ["chrome-extension://${extensionId}/"]`;

src/background/index.ts+47−40

@@ -10,6 +10,8 @@ import { forgetArchived, parkedTitle, restoreAll, restoreArchived, runSweep, und

1010

1111/** Event wiring only: every rule lives in engine / naming / organize / tidy. */

1212

13+const GROUPS_SUPPORTED = typeof chrome.tabGroups?.query === "function";

14+

1315const ALARM_NAMING = "naming-fallback";

1416const ALARM_TIDY = "tidy-sweep";

1517const ALARM_HOST = "host-retry";

@@ -335,7 +337,7 @@ async function tabById(id: number): Promise<chrome.tabs.Tab | undefined> {

335337/**

336338 * On startup and install: rebuild the state model from the live browser. Tab and group ids change

337339 * across restarts, so records are matched by id first and then by URL (tabs) or title and colour

338− * (groups), which keeps managed groups managed after Brave restarts.

340+ * (groups), which keeps managed groups managed after the browser restarts.

339341 */

340342async function reconcile(): Promise<void> {

341343 const [tabs, groups] = await Promise.all([chrome.tabs.query({}), chrome.tabGroups.query({})]);

@@ -417,48 +419,52 @@ async function boot(reason: "startup" | "installed"): Promise<void> {

417419

418420// ----- browser events --------------------------------------------------------------------------

419421

420−chrome.runtime.onStartup.addListener(() => void boot("startup"));

421−chrome.runtime.onInstalled.addListener(() => void boot("installed"));

422−

423−chrome.tabs.onCreated.addListener((tab) =>

424− serial("tabs.onCreated", async () => {

425− const opener = tab.openerTabId !== undefined ? await tabById(tab.openerTabId) : undefined;

426− await feed({ type: "tabCreated", tab: snapTab(tab), opener: opener && snapTab(opener) });

427− }),

428−);

429−

430−chrome.tabs.onUpdated.addListener((_id, change, tab) => {

431− if (!("title" in change || "url" in change || "status" in change || "groupId" in change || "pinned" in change)) return;

432− void serial("tabs.onUpdated", () => feed({ type: "tabUpdated", tab: snapTab(tab) }));

433−});

434−

435−const refetch = (where: string) => (tabId: number) =>

436− void serial(where, async () => {

437− const t = await tabById(tabId);

438− if (t) await feed({ type: "tabUpdated", tab: snapTab(t) });

422+// Every Chromium browser has tabs, but not all let extensions manage tab groups (chrome.tabGroups,

423+// Chromium 89+): without it Diagonal stays idle and the popup says why.

424+if (GROUPS_SUPPORTED) {

425+ chrome.runtime.onStartup.addListener(() => void boot("startup"));

426+ chrome.runtime.onInstalled.addListener(() => void boot("installed"));

427+

428+ chrome.tabs.onCreated.addListener((tab) =>

429+ serial("tabs.onCreated", async () => {

430+ const opener = tab.openerTabId !== undefined ? await tabById(tab.openerTabId) : undefined;

431+ await feed({ type: "tabCreated", tab: snapTab(tab), opener: opener && snapTab(opener) });

432+ }),

433+ );

434+

435+ chrome.tabs.onUpdated.addListener((_id, change, tab) => {

436+ if (!("title" in change || "url" in change || "status" in change || "groupId" in change || "pinned" in change)) return;

437+ void serial("tabs.onUpdated", () => feed({ type: "tabUpdated", tab: snapTab(tab) }));

439438 });

440−chrome.tabs.onMoved.addListener(refetch("tabs.onMoved"));

441−chrome.tabs.onAttached.addListener(refetch("tabs.onAttached"));

442−

443−chrome.tabs.onRemoved.addListener((tabId) => void serial("tabs.onRemoved", () => feed({ type: "tabRemoved", tabId })));

444−

445−chrome.tabs.onReplaced.addListener((added, removed) =>

446− void serial("tabs.onReplaced", async () => {

447− const rec = state.tabs[removed];

448− delete state.tabs[removed];

449− const t = await tabById(added);

450− if (t) {

451− await feed({ type: "tabUpdated", tab: snapTab(t) });

452− if (rec?.description && state.tabs[added]) state.tabs[added].description = rec.description;

453− }

454− }),

455−);

456439

457−chrome.tabs.onActivated.addListener(({ tabId }) => void serial("tabs.onActivated", () => feed({ type: "tabActivated", tabId })));

440+ const refetch = (where: string) => (tabId: number) =>

441+ void serial(where, async () => {

442+ const t = await tabById(tabId);

443+ if (t) await feed({ type: "tabUpdated", tab: snapTab(t) });

444+ });

445+ chrome.tabs.onMoved.addListener(refetch("tabs.onMoved"));

446+ chrome.tabs.onAttached.addListener(refetch("tabs.onAttached"));

447+

448+ chrome.tabs.onRemoved.addListener((tabId) => void serial("tabs.onRemoved", () => feed({ type: "tabRemoved", tabId })));

449+

450+ chrome.tabs.onReplaced.addListener((added, removed) =>

451+ void serial("tabs.onReplaced", async () => {

452+ const rec = state.tabs[removed];

453+ delete state.tabs[removed];

454+ const t = await tabById(added);

455+ if (t) {

456+ await feed({ type: "tabUpdated", tab: snapTab(t) });

457+ if (rec?.description && state.tabs[added]) state.tabs[added].description = rec.description;

458+ }

459+ }),

460+ );

458461

459−chrome.tabGroups.onCreated.addListener((g) => void serial("tabGroups.onCreated", () => feed({ type: "groupCreated", group: snapGroup(g) })));

460−chrome.tabGroups.onUpdated.addListener((g) => void serial("tabGroups.onUpdated", () => feed({ type: "groupUpdated", group: snapGroup(g) })));

461−chrome.tabGroups.onRemoved.addListener((g) => void serial("tabGroups.onRemoved", () => feed({ type: "groupRemoved", groupId: g.id })));

462+ chrome.tabs.onActivated.addListener(({ tabId }) => void serial("tabs.onActivated", () => feed({ type: "tabActivated", tabId })));

463+

464+ chrome.tabGroups.onCreated.addListener((g) => void serial("tabGroups.onCreated", () => feed({ type: "groupCreated", group: snapGroup(g) })));

465+ chrome.tabGroups.onUpdated.addListener((g) => void serial("tabGroups.onUpdated", () => feed({ type: "groupUpdated", group: snapGroup(g) })));

466+ chrome.tabGroups.onRemoved.addListener((g) => void serial("tabGroups.onRemoved", () => feed({ type: "groupRemoved", groupId: g.id })));

467+}

462468

463469chrome.alarms.onAlarm.addListener((alarm) => {

464470 void (async () => {

@@ -637,6 +643,7 @@ async function statusFor(windowId: number | undefined): Promise<unknown> {

637643 size: (await chrome.tabs.query({ groupId: g.id }).catch(() => [])).length,

638644 })),

639645 ),

646+ groupsSupported: GROUPS_SUPPORTED,

640647 extensionId: chrome.runtime.id,

641648 manifestPath: HOST_MANIFEST_PATH,

642649 };

src/options/options.ts+2−1

@@ -125,7 +125,8 @@ async function main(): Promise<void> {

125125 settings = withDefaults((await chrome.storage.local.get("settings")).settings);

126126 renderSettings();

127127 const id = chrome.runtime.id;

128− const path = "~/Library/Application Support/BraveSoftware/Brave-Browser/NativeMessagingHosts/io.diagonal.host.json";

128+ // Each Chromium browser has its own folder: Google/Chrome, BraveSoftware/Brave-Browser, BraveSoftware/Brave-Origin, …

129+ const path = "~/Library/Application Support/<browser>/NativeMessagingHosts/io.diagonal.host.json";

129130 const manifest = JSON.stringify({

130131 name: "io.diagonal.host",

131132 description: "Diagonal: names tab groups with Apple's on-device model",

src/popup/popup.ts+2

@@ -5,6 +5,7 @@ let windowId: number | undefined;

66interface Status {

77 health: "ok" | "unknown" | "degraded";

8+ groupsSupported: boolean;

89 message: string;

910 lastError?: { code: string; message: string };

1011 lastPing?: { fmAvailable: boolean; schemasOk: boolean };

@@ -45,6 +46,7 @@ function renderStatus(s: Status): void {

4546 const notice = $("notice");

4647 notice.replaceChildren();

4748 const lines: (string | Node)[] = [];

49+ if (!s.groupsSupported) lines.push("This browser doesn't let extensions manage tab groups, so Diagonal can't group tabs here.");

4850 if (s.message) lines.push(s.message);

4951 if (s.timeoutHint) lines.push("Three timeouts in a row: consider raising the timeout in Settings.");

5052 if (s.lastError?.code === "HOST_NOT_FOUND") {

src/shared/url.ts+1−1

@@ -1,6 +1,6 @@

11import { colorForKey, type GroupColor } from "./colors";

3−const INTERNAL_PREFIXES = ["brave:", "chrome:", "chrome-extension:", "chrome-search:", "chrome-untrusted:", "devtools:", "edge:", "file:", "about:", "view-source:", "data:", "javascript:", "blob:"];

3+const INTERNAL_PREFIXES = ["brave:", "chrome:", "chrome-extension:", "chrome-search:", "chrome-untrusted:", "devtools:", "edge:", "vivaldi:", "opera:", "file:", "about:", "view-source:", "data:", "javascript:", "blob:"];

55/** True for pages that never feed grouping data or prompts (section 11). */

66export function isInternalUrl(url: string | undefined): boolean {