khan: document %peek overlay

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Jōshin 2021-12-25 08:26:05 +00:00
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@ -29,6 +29,15 @@
** external peek interface in arvo, at arm 22. (lyc is always
** [~ ~], i.e. request from self.)
**
** the %peek runtime overlay functions like an extra arm of the
** $%. the full accepted type would be something like:
**
** $+ each path
** $% [%once vis=view syd=desk tyl=spur]
** [%beam vis=view bem=beam]
** [%urth *]
** ==
**
** %move is a kernel move. these are injected into arvo, except
** again for a runtime overlay.
**