Merge branch 'main' into garrytan/team-supabase-store

Resolved 4 conflicts:
- scripts/gen-skill-docs.ts: kept ARTIFACT_SETUP + added main's new
  resolvers (SPEC_REVIEW_LOOP, DESIGN_SKETCH, BENEFITS_FROM,
  CODEX_REVIEW_STEP). Updated codex review-log to use new paths.
- ship/SKILL.md.tmpl: adopted {{CODEX_REVIEW_STEP}} macro from main
- test/skill-e2e.test.ts: added main's new E2E tests (office-hours
  spec review, plan-ceo benefits-from) + kept our E2E isolation cleanup

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

README.md

@@ -42,7 +42,7 @@ Expect first useful run in under 5 minutes on any repo with tests already set up
 
 ## Install — takes 30 seconds
 
-**Requirements:** [Claude Code](https://docs.anthropic.com/en/docs/claude-code), [Git](https://git-scm.com/), [Bun](https://bun.sh/) v1.0+
+**Requirements:** [Claude Code](https://docs.anthropic.com/en/docs/claude-code), [Git](https://git-scm.com/), [Bun](https://bun.sh/) v1.0+, [Node.js](https://nodejs.org/) (Windows only)
 
 ### Step 1: Install on your machine
 
@@ -56,6 +56,24 @@ Open Claude Code and paste this. Claude does the rest.
 
 Real files get committed to your repo (not a submodule), so `git clone` just works. Everything lives inside `.claude/`. Nothing touches your PATH or runs in the background.
 
+### Codex, Gemini CLI, or Cursor
+
+gstack works on any agent that supports the [SKILL.md standard](https://github.com/anthropics/claude-code). Skills live in `.agents/skills/` and are discovered automatically.
+
+```bash
+git clone https://github.com/garrytan/gstack.git ~/.codex/skills/gstack
+cd ~/.codex/skills/gstack && ./setup --host codex
+```
+
+Or let setup auto-detect which agents you have installed:
+
+```bash
+git clone https://github.com/garrytan/gstack.git ~/gstack
+cd ~/gstack && ./setup --host auto
+```
+
+This installs to `~/.claude/skills/gstack` and/or `~/.codex/skills/gstack` depending on what's available. All 21 skills work across all supported agents. Hook-based safety skills (careful, freeze, guard) use inline safety advisory prose on non-Claude hosts.
+
 ## See it work
 
 ```
@@ -198,6 +216,20 @@ Fifteen specialists and six power tools. All slash commands. All Markdown. All f
 | [Contributing](CONTRIBUTING.md) | Dev setup, testing, contributor mode, and dev mode |
 | [Changelog](CHANGELOG.md) | What's new in every version |
 
+## Privacy & Telemetry
+
+gstack includes **opt-in** usage telemetry to help improve the project. Here's exactly what happens:
+
+- **Default is off.** Nothing is sent anywhere unless you explicitly say yes.
+- **On first run,** gstack asks if you want to share anonymous usage data. You can say no.
+- **What's sent (if you opt in):** skill name, duration, success/fail, gstack version, OS. That's it.
+- **What's never sent:** code, file paths, repo names, branch names, prompts, or any user-generated content.
+- **Change anytime:** `gstack-config set telemetry off` disables everything instantly.
+
+Data is stored in [Supabase](https://supabase.com) (open source Firebase alternative). The schema is in [`supabase/migrations/001_telemetry.sql`](supabase/migrations/001_telemetry.sql) — you can verify exactly what's collected. The Supabase publishable key in the repo is a public key (like a Firebase API key) — row-level security policies restrict it to insert-only access.
+
+**Local analytics are always available.** Run `gstack-analytics` to see your personal usage dashboard from the local JSONL file — no remote data needed.
+
 ## Troubleshooting
 
 **Skill not showing up?** `cd ~/.claude/skills/gstack && ./setup`
@@ -206,6 +238,8 @@ Fifteen specialists and six power tools. All slash commands. All Markdown. All f
 
 **Stale install?** Run `/gstack-upgrade` — or set `auto_upgrade: true` in `~/.gstack/config.yaml`
 
+**Windows users:** gstack works on Windows 11 via Git Bash or WSL. Node.js is required in addition to Bun — Bun has a known bug with Playwright's pipe transport on Windows ([bun#4253](https://github.com/oven-sh/bun/issues/4253)). The browse server automatically falls back to Node.js. Make sure both `bun` and `node` are on your PATH.
+
 **Claude says it can't see the skills?** Make sure your project's `CLAUDE.md` has a gstack section. Add this:
 
 ```