Codex re-fires SessionStart with source "compact" after every context
compaction; the summary keeps progress but sheds the bootstrap and any
active skill's instructions — measured July cause of post-compaction
dispatch drift in long SDD runs (with re-injection: 18/18 hook fires,
66/66 post-compaction dispatch tuples correct in a 12.4h stress run).
Codex discovers skills natively at startup, so the hook is silent
there: the compact re-fire is the one unowned lifecycle point.
Adds the plugin-provided hook (hooks-codex.json + session-start-codex,
compact-only, fails open), wires it into the manifest and package,
documents install/trust behavior, updates codex-tools.md with the
re-grounding fallback, and tests the hook lifecycle, manifest, and
archive contents.
Rebuilt from the July codex-spinout-fixes branch, pared to the hook
core: the dispatch-hints layer it used to ride with is superseded by
the merged 2059-2062/2077-2080 stack and is dropped.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Codex auto-discovers a plugin's hooks/hooks.json whenever the Codex
manifest has no `hooks` field: load_plugin_hooks falls back to a
hardcoded DEFAULT_HOOKS_CONFIG_FILE = "hooks/hooks.json" and registers
it. hooks/hooks.json is the Claude Code SessionStart hook, it is tracked
in this repo, and the Codex marketplace installs the whole repo root
(source url "./"), so the fallback re-registered the SessionStart hook
and its install-time trust prompt on Codex.
Removing the Codex hook file and the manifest `hooks` pointer (commit
"Remove Codex hooks") did not disable the hook on Codex — it removed the
explicit declaration that was overriding the fallback, so the fallback
took over and found the Claude hooks/hooks.json.
Declare an empty inline hooks object ({}) in .codex-plugin/plugin.json.
It parses as an empty inline hook set and stops Codex reaching the
auto-discovery fallback. An absent field, an empty array ([]), and an
empty inline list all collapse back to the fallback, so the value must
be exactly {}.
Update the test to assert the manifest declares hooks: {} (and that
hooks/hooks.json exists, which is what makes the declaration necessary),
replacing the prior assertion that the field was absent — which passed
while the hook was still being auto-discovered.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Commit 1f0c76e removed the Codex SessionStart hook — dropping the hooks
field from .codex-plugin/plugin.json and deleting hooks-codex.json — but
left test-marketplace-manifest.sh asserting the old hooks pointer, so the
test has failed on dev since. Assert the field is absent instead, locking
in the no-Codex-hooks decision.
Prompt: Jesse questioned whether the PR should remove the hooks config from the Codex plugin manifest.
Runtime investigation showed Codex accepts a committed plugin manifest with hooks and installs the plugin successfully. Removing the field changes behavior: Codex falls back to the default hooks/hooks.json, which uses the non-Codex session-start hook and CLAUDE_PLUGIN_ROOT path, instead of hooks/hooks-codex.json and the session-start-codex script.
Changes: restore .codex-plugin/plugin.json hooks to ./hooks/hooks-codex.json and update the Codex marketplace manifest test to require that Codex-specific hook pointer instead of rejecting hooks.
Validation: bash tests/codex/test-marketplace-manifest.sh; scripts/lint-shell.sh tests/codex/test-marketplace-manifest.sh; bash tests/codex-plugin-sync/test-sync-to-codex-plugin.sh; bash tests/kimi/test-plugin-manifest.sh; bash tests/shell-lint/test-lint-shell.sh.
Prompt: Jesse asked for a new worktree off the local superpowers dev branch to add the Codex manifest after diagnosing why github.com/obra/superpowers did not show installable Codex plugins.
Root cause: Codex marketplace sources expect a .agents/plugins/marketplace.json at the marketplace root. The superpowers repo only had the Claude marketplace file and the Codex plugin manifest, so Codex could configure the marketplace name but found no installable plugin entries.
Changes: add a repo-local Codex marketplace manifest for superpowers-dev that points at this same repository root via the same-root source pattern Codex already accepts; add a focused marketplace manifest test; remove the unsupported hooks field from .codex-plugin/plugin.json so the plugin validator accepts the manifest.
Validation: bash tests/codex/test-marketplace-manifest.sh; uv run --with PyYAML python /Users/jesse/.codex/skills/.system/plugin-creator/scripts/validate_plugin.py /Users/jesse/git/superpowers/superpowers/.worktrees/codex-marketplace-manifest; throwaway HOME codex plugin marketplace add/list/add; bash tests/codex-plugin-sync/test-sync-to-codex-plugin.sh; bash tests/kimi/test-plugin-manifest.sh; bash tests/shell-lint/test-lint-shell.sh; scripts/lint-shell.sh tests/codex/test-marketplace-manifest.sh.
