The dash-delimited launch package modes of built punk shells (dev/os/src/
internal, implemented in src/vfs/_config/punk_main.tcl) had no agent-facing
record. bin/AGENTS.md now documents the mode grammar and, in operational
terms, the src mode that matters for verifying working-tree changes:
exe-location-based project-root discovery, the source module paths it
prepends, package prefer latest (dev 999999.0a1.0 modules beating
kit-stamped snapshots), and how 'package present' distinguishes a src-mode
session from a plain kit launch. Also records the both-Tcl-generations
interactive verification convention (a Tcl 8.6-based shell plus the current
Tcl 9-based incarnation, deliberately not version-pinned) and the role of
the plain runtime kits under bin/runtime/ for punk-free probes.
Root AGENTS.md Child DOX Index gains the bin/ entry, and .gitignore gains
a !/bin/AGENTS.md negation alongside the other source-controlled bin items
(the /bin/* ignore is why no doc lived there before).
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Julian Noble