fix: browse binary discovery broken for agents (v0.3.5) (#44)

* fix: replace find-browse with direct path in SKILL.md setup blocks

Agents were skipping the find-browse binary and guessing bin/browse
(wrong path). Now the setup block explicitly checks browse/dist/browse
with workspace-local priority, global fallback.

Also adds || true to update check to prevent misleading exit code 1.

Adds {{UPDATE_CHECK}} and {{BROWSE_SETUP}} template placeholders to
gen-skill-docs.ts so all skills share a single source of truth.

* refactor: convert qa/ and setup-browser-cookies/ to .tmpl templates

Replaces hardcoded update check and find-browse blocks with
{{UPDATE_CHECK}} and {{BROWSE_SETUP}} placeholders. Both skills
are now generated from templates via gen-skill-docs.

* test: add e2e and LLM eval tests for SKILL.md setup block

- 3 Agent SDK e2e tests: happy path, NEEDS_SETUP, non-git-repo
- LLM eval: setup block clarity + actionability >= 4
- New error pattern: 'no such file or directory.*browse'

These tests catch the exact failure mode where agents can't discover
the browse binary via SKILL.md instructions.

* chore: bump version and changelog (v0.3.5)

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

---------

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

SKILL.md.tmpl

@@ -14,35 +14,14 @@ allowed-tools:
 
 ---
 
-## Update Check (run first)
-
-```bash
-_UPD=$(~/.claude/skills/gstack/bin/gstack-update-check 2>/dev/null || .claude/skills/gstack/bin/gstack-update-check 2>/dev/null || true)
-[ -n "$_UPD" ] && echo "$_UPD"
-```
-
-If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/gstack/gstack-upgrade/SKILL.md` and follow the "Inline upgrade flow" (AskUserQuestion → upgrade if yes, `touch ~/.gstack/last-update-check` if no). If `JUST_UPGRADED <from> <to>`: tell user "Running gstack v{to} (just updated!)" and continue.
+{{UPDATE_CHECK}}
 
 # gstack browse: QA Testing & Dogfooding
 
 Persistent headless Chromium. First call auto-starts (~3s), then ~100-200ms per command.
 Auto-shuts down after 30 min idle. State persists between calls (cookies, tabs, sessions).
 
-## SETUP (run this check BEFORE any browse command)
-
-```bash
-B=$(browse/bin/find-browse 2>/dev/null || ~/.claude/skills/gstack/browse/bin/find-browse 2>/dev/null)
-if [ -n "$B" ]; then
-  echo "READY: $B"
-else
-  echo "NEEDS_SETUP"
-fi
-```
-
-If `NEEDS_SETUP`:
-1. Tell the user: "gstack browse needs a one-time build (~10 seconds). OK to proceed?" Then STOP and wait.
-2. Run: `cd <SKILL_DIR> && ./setup`
-3. If `bun` is not installed: `curl -fsSL https://bun.sh/install | bash`
+{{BROWSE_SETUP}}
 
 ## IMPORTANT
 
@@ -56,8 +35,6 @@ If `NEEDS_SETUP`:
 ### Test a user flow (login, signup, checkout, etc.)
 
 ```bash
-B=~/.claude/skills/gstack/browse/dist/browse
-
 # 1. Go to the page
 $B goto https://app.example.com/login