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>

scripts/gen-skill-docs.ts

@@ -94,9 +94,43 @@ function generateSnapshotFlags(): string {
   return lines.join('\n');
 }
 
+function generateUpdateCheck(): string {
+  return `## 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 "$_UPD" || true
+\`\`\`
+
+If output shows \`UPGRADE_AVAILABLE <old> <new>\`: read \`~/.claude/skills/gstack/gstack-upgrade/SKILL.md\` and follow the "Inline upgrade flow" (AskUserQuestion → upgrade if yes, \`touch ~/.gstack/last-update-check\` if no). If \`JUST_UPGRADED <from> <to>\`: tell user "Running gstack v{to} (just updated!)" and continue.`;
+}
+
+function generateBrowseSetup(): string {
+  return `## SETUP (run this check BEFORE any browse command)
+
+\`\`\`bash
+_ROOT=$(git rev-parse --show-toplevel 2>/dev/null)
+B=""
+[ -n "$_ROOT" ] && [ -x "$_ROOT/.claude/skills/gstack/browse/dist/browse" ] && B="$_ROOT/.claude/skills/gstack/browse/dist/browse"
+[ -z "$B" ] && B=~/.claude/skills/gstack/browse/dist/browse
+if [ -x "$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\``;
+}
+
 const RESOLVERS: Record<string, () => string> = {
   COMMAND_REFERENCE: generateCommandReference,
   SNAPSHOT_FLAGS: generateSnapshotFlags,
+  UPDATE_CHECK: generateUpdateCheck,
+  BROWSE_SETUP: generateBrowseSetup,
 };
 
 // ─── Template Processing ────────────────────────────────────
@@ -141,6 +175,8 @@ function findTemplates(): string[] {
   const candidates = [
     path.join(ROOT, 'SKILL.md.tmpl'),
     path.join(ROOT, 'browse', 'SKILL.md.tmpl'),
+    path.join(ROOT, 'qa', 'SKILL.md.tmpl'),
+    path.join(ROOT, 'setup-browser-cookies', 'SKILL.md.tmpl'),
   ];
   for (const p of candidates) {
     if (fs.existsSync(p)) templates.push(p);