hooks/session-start-codex has had no caller since "Remove Codex hooks"
(#1845) deleted hooks-codex.json and its manifest registration; the
Codex manifest now declares an empty hooks object so Codex registers no
session-start hook at all. The script is Codex-specific dead code —
nothing executes it on Codex or any other harness.
- Delete hooks/session-start-codex.
- tests/hooks/test-session-start.sh: drop the two Codex cases that are
redundant with the generic session-start tests (nested-format and the
legacy-warning omission are already covered by the Claude Code cases).
Re-point the "wrapper dispatches" case to the live `session-start`
script so run-hook.cmd dispatch coverage — used by Claude Code and
Cursor in production — is preserved rather than lost.
- docs/porting-to-a-new-harness.md: Codex is no longer a Shape A
(shell-hook) harness, so re-anchor that worked example to Cursor (a
live shell-hook harness that demonstrates the same per-harness field,
schema, and matcher variance) and mark Codex as native skill discovery
with no session-start hook. Clears the references to the deleted
hooks-codex.json.
- docs/windows/polyglot-hooks.md: the "check hooks-codex.json" pointer
referenced a file deleted in #1845; re-point to hooks-cursor.json.
RELEASE-NOTES.md keeps its historical mention of hooks-codex.json (it
accurately records what that release did). The tests/codex-plugin-sync
fixtures build their own synthetic session-start-codex and test the sync
mechanism generically, so they are intentionally left as-is.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Rewrite the Windows polyglot hook documentation to match the current run-hook.cmd dispatcher and update the porting guide cross-reference.\n\nFixes #1653.
An evergreen guide for adding support for a new harness (IDE, CLI, or agent
runner). Teaches the invariants — automatic session-start bootstrap, skill
discovery/invocation, tool mapping, the acceptance test — and points at the
closest reference integration shape (shell-hook, in-process plugin,
instructions-file / declared context file) to copy. Covers discovery, build,
local install, tmux-driven verification, distribution, and PR submission, with a
live reference-integration index and a gotchas appendix.
Two non-negotiable rules: (1) never edit skill bodies; (2) everything ships
through the harness's own install mechanism — never edit the user's config. When
a plugin installer strips undeclared files, declare the bootstrap as a recognized
component (a manifest contextFileName-style context file the installer preserves
and the harness loads every session), generated at install time from the live
SKILL.md + tool mapping. Surfaced-skill-description bootstrap is the softer
fallback.
Hardened against real end-to-end ports (Antigravity CLI): shapes can compose; a
fork doesn't inherit its parent's behavior; a hook system != a usable
session-start event; verify @-includes AND context-file preservation with a
marker; web-search the docs and study existing plugins; reverse-engineer
undocumented harnesses; print/headless modes may hang; workspace-trust gates
stall tmux; declared context files survive plugin install while undeclared files
are stripped; skills-path registration is per-harness.
