feat: natural language skill routing + proactive suggestions (v0.7.1) (#195)

* feat: add trigger phrases to /debug and /office-hours

These two skills had zero "Use when asked to..." phrases, making them
completely invisible to natural language. Users saying "debug this" or
"brainstorm an idea" would get no skill invocation.

* feat: add proactive triggers to all workflow skills

Every skill now has "Proactively suggest when..." language so Claude
surfaces skills at natural moments — not just when the user says
specific trigger phrases.

* feat: lifecycle map + proactive preference system

Root gstack description now includes a developer workflow guide mapping
12 stages to skills. Preamble reads proactive preference via gstack-config.
Users can opt out with "stop suggesting things" and re-enable with
"be proactive again" — natural language toggle, no CLI needed.

* test: 11 journey-stage E2E routing tests + trigger phrase validation

Each test simulates a real development stage (ideation, plan review,
debug, QA, ship, retro...) with realistic project context and verifies
the right skill fires from natural language alone. 11/11 pass.

* chore: bump version and changelog (v0.7.1)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

SKILL.md.tmpl

@@ -7,6 +7,32 @@ description: |
   responsive layouts, test forms and uploads, handle dialogs, and assert element states.
   ~100ms per command. Use when you need to test a feature, verify a deployment, dogfood a
   user flow, or file a bug with evidence.
+
+  gstack also includes development workflow skills. When you notice the user is at
+  these stages, suggest the appropriate skill:
+  - Brainstorming a new idea → suggest /office-hours
+  - Reviewing a plan (strategy) → suggest /plan-ceo-review
+  - Reviewing a plan (architecture) → suggest /plan-eng-review
+  - Reviewing a plan (design) → suggest /plan-design-review
+  - Creating a design system → suggest /design-consultation
+  - Debugging errors → suggest /debug
+  - Testing the app → suggest /qa
+  - Code review before merge → suggest /review
+  - Visual design audit → suggest /design-review
+  - Ready to deploy / create PR → suggest /ship
+  - Post-ship doc updates → suggest /document-release
+  - Weekly retrospective → suggest /retro
+
+  If the user pushes back on skill suggestions ("stop suggesting things",
+  "I don't need suggestions", "too aggressive"):
+  1. Stop suggesting for the rest of this session
+  2. Run: gstack-config set proactive false
+  3. Say: "Got it — I'll stop suggesting skills. Just tell me to be proactive
+     again if you change your mind."
+
+  If the user says "be proactive again" or "turn on suggestions":
+  1. Run: gstack-config set proactive true
+  2. Say: "Proactive suggestions are back on."
 allowed-tools:
   - Bash
   - Read