fix(kyberforge): detect a single stale package at SessionStart

apm prints "1 outdated dependency found" in the singular when exactly one
package is behind (apm_cli/commands/outdated.py). check-apm-current.sh
matched only "outdated dependencies found", so one stale package was
invisible: the hook exited 0 silently and no refresh ran. With six
packages merging independently, one-behind is the ordinary case, so the
freshness mechanism failed most often in the situation it exists for.

Three further defects in the same hook:

- The host timeout was below the script's own budget. hooks.json declared
  320s while the script allows `timeout 60` plus `timeout 300` = 360s, so
  a slow remote let the host kill the hook mid-update and leave
  .claude/skills/ half-deployed with nothing emitted. Now 380. A test
  asserts the invariant rather than the literal: it sums every `timeout N`
  parsed out of the script and requires hooks.json to exceed it, so
  changing either side alone fails.

- The lockfile guard was cwd-relative, so a session opened in a
  subdirectory no-opped silently and ran both apm calls against the wrong
  directory. Now anchored on CLAUDE_PROJECT_DIR, falling back to the cwd
  so the hook stays inert under a host that does not set it.

- Every assertion mocked apm, so the suite was green over code that could
  not detect its own most common trigger. That blind spot is what hid the
  singular/plural bug, and it is the same shape as the deleted post-push
  tests. The suite now stages a genuinely outdated dependency against a
  local git remote — offline, via url.<path>.insteadOf, so the
  pass-under-unshare property survives — runs the real `apm outdated`, and
  replays its output through the real hook. Reverting the grep to
  plural-only fails it.

23 -> 35 assertions. Each fix mutation-tested individually. kyberforge
stays at 1.5.0: it is untagged, so this changes what 1.5.0 ships rather
than superseding it, and executables.allow needs no edit.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X7GvKuJfy2WrdBmUttV4DT

plugins/kyberforge/docs/hooks.md

@@ -83,9 +83,33 @@ Note that apm's **executable-trust gate is off** unless the consuming project's
 
 `check-apm-current.sh` keeps an apm-consumed install level with its remote: it runs `apm outdated`,
 and if anything is behind, runs `apm update --yes` and returns `reloadSkills: true` so the running
-session picks up the redeployed content. It exits silently when there is no `apm.lock.yaml` in the
-working directory, which makes it inert for any host that installed this plugin natively rather than
-through apm. Rationale, measurements, and the failure modes are in ADR-0019.
+session picks up the redeployed content. Rationale, measurements, and the failure modes are in
+ADR-0019.
+
+**Where it looks for the lockfile.** The hook resolves a project directory as `${CLAUDE_PROJECT_DIR}`
+when the host exports it (Claude Code does, for SessionStart hooks) and the current directory
+otherwise, then exits silently unless that directory holds an `apm.lock.yaml` — which is what makes
+it inert for any host that installed this plugin natively rather than through apm. Both `apm`
+invocations run against the same resolved directory. The earlier spelling checked a bare
+`apm.lock.yaml` against the session's cwd, so a session opened in a subdirectory of an
+apm-consuming repo no-opped silently. Keep the cwd fallback: a host that sets no
+`CLAUDE_PROJECT_DIR` must still get inert-but-harmless behaviour, not an unset-variable error.
+
+**The `timeout` in `hooks.json` must exceed the script's own budget.** The script spends at most
+`timeout 60 apm outdated` plus `timeout 300 apm update`; the hook entry declares `timeout: 380`, the
+sum plus a buffer. Set it lower and a slow remote gets the hook SIGKILLed mid-`apm update`, leaving a
+partially redeployed `.claude/skills/` and emitting no notice — precisely the silent failure the hook
+exists to prevent. `tests/test-apm-current-hook.sh` pins the relationship (host timeout > sum of the
+script's internal timeouts) rather than the literal, so raising either side alone fails the suite.
+
+**Staleness is detected by matching apm's summary line, and both spellings count.** `apm outdated`
+has no `--json` or otherwise machine-readable output (verified against apm 0.28.0), so the hook
+greps its text. apm prints `1 outdated dependency found` in the singular when exactly one package is
+behind and `N outdated dependencies found` otherwise; matching only the plural silently misses a
+one-package drift. Because a mocked `apm` would keep a reworded release invisible, the test suite
+stages a genuinely outdated dependency against the **real** `apm` — a local git repo reached through
+`url.<path>.insteadOf` rewrites, so it needs no network — and replays that genuine output through the
+hook.
 
 ## GitHub Copilot CLI