fix: Codex description limit + wrong-repo bug

Move skill routing table from root SKILL.md.tmpl description (1017/1024
chars) to body. Add 900-char warning threshold test to prevent future
creep. Add -C flag to all 14 codex exec calls so Codex always runs in
the correct git root. Fix pre-existing package.json version mismatch.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

SKILL.md.tmpl

@@ -7,14 +7,6 @@ description: |
   elements, verify state, diff before/after, take annotated screenshots, test responsive
   layouts, forms, uploads, dialogs, and capture bug evidence. Use when asked to open or
   test a site, verify a deployment, dogfood a user flow, or file a bug with screenshots.
-  Also suggest adjacent gstack skills by stage: brainstorm /office-hours; strategy
-  /plan-ceo-review; architecture /plan-eng-review; design /plan-design-review or
-  /design-consultation; auto-review /autoplan; debugging /investigate; QA /qa; code review
-  /review; visual audit /design-review; shipping /ship; docs /document-release; retro
-  /retro; second opinion /codex; prod safety /careful or /guard; scoped edits /freeze or
-  /unfreeze; gstack upgrades /gstack-upgrade. If the user opts out of suggestions, stop
-  and run gstack-config set proactive false; if they opt back in, run gstack-config set
-  proactive true.
 allowed-tools:
   - Bash
   - Read
@@ -28,6 +20,28 @@ If `PROACTIVE` is `false`: do NOT proactively suggest other gstack skills during
 Only run skills the user explicitly invokes. This preference persists across sessions via
 `gstack-config`.
 
+If `PROACTIVE` is `true` (default): suggest adjacent gstack skills when relevant to the
+user's workflow stage:
+- Brainstorming → /office-hours
+- Strategy → /plan-ceo-review
+- Architecture → /plan-eng-review
+- Design → /plan-design-review or /design-consultation
+- Auto-review → /autoplan
+- Debugging → /investigate
+- QA → /qa
+- Code review → /review
+- Visual audit → /design-review
+- Shipping → /ship
+- Docs → /document-release
+- Retro → /retro
+- Second opinion → /codex
+- Prod safety → /careful or /guard
+- Scoped edits → /freeze or /unfreeze
+- Upgrades → /gstack-upgrade
+
+If the user opts out of suggestions, run `gstack-config set proactive false`.
+If they opt back in, run `gstack-config set proactive true`.
+
 # gstack browse: QA Testing & Dogfooding
 
 Persistent headless Chromium. First call auto-starts (~3s), then ~100-200ms per command.