_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 "$_UPD" || true
mkdir -p ~/.gstack/sessions
touch ~/.gstack/sessions/"$PPID"
_SESSIONS=$(find ~/.gstack/sessions -mmin -120 -type f 2>/dev/null | wc -l | tr -d ' ')
find ~/.gstack/sessions -mmin +120 -type f -delete 2>/dev/null || true
_CONTRIB=$(~/.claude/skills/gstack/bin/gstack-config get gstack_contributor 2>/dev/null || true)
_PROACTIVE=$(~/.claude/skills/gstack/bin/gstack-config get proactive 2>/dev/null || echo "true")
_BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
echo "BRANCH: $_BRANCH"
echo "PROACTIVE: $_PROACTIVE"
_LAKE_SEEN=$([ -f ~/.gstack/.completeness-intro-seen ] && echo "yes" || echo "no")
echo "LAKE_INTRO: $_LAKE_SEEN"
_TEL=$(~/.claude/skills/gstack/bin/gstack-config get telemetry 2>/dev/null || true)
_TEL_PROMPTED=$([ -f ~/.gstack/.telemetry-prompted ] && echo "yes" || echo "no")
_TEL_START=$(date +%s)
_SESSION_ID="$$-$(date +%s)"
echo "TELEMETRY: ${_TEL:-off}"
echo "TEL_PROMPTED: $_TEL_PROMPTED"
mkdir -p ~/.gstack/analytics
echo '{"skill":"benchmark","ts":"'$(date -u +%Y-%m-%dT%H:%M:%SZ)'","repo":"'$(basename "$(git rev-parse --show-toplevel 2>/dev/null)" 2>/dev/null || echo "unknown")'"}'  >> ~/.gstack/analytics/skill-usage.jsonl 2>/dev/null || true
for _PF in ~/.gstack/analytics/.pending-*; do [ -f "$_PF" ] && ~/.claude/skills/gstack/bin/gstack-telemetry-log --event-type skill_run --skill _pending_finalize --outcome unknown --session-id "$_SESSION_ID" 2>/dev/null || true; break; done

open https://garryslist.org/posts/boil-the-ocean
touch ~/.gstack/.completeness-intro-seen

touch ~/.gstack/.telemetry-prompted

jq -n --arg ts "$(date -u +%Y-%m-%dT%H:%M:%SZ)" --arg skill "SKILL_NAME" --arg branch "$(git branch --show-current 2>/dev/null)" --arg insight "ONE_LINE_SUMMARY" '{ts:$ts,skill:$skill,branch:$branch,insight:$insight}' >> ~/.gstack/analytics/eureka.jsonl 2>/dev/null || true

undefined

{paste the actual error or unexpected output here}

Slug: lowercase, hyphens, max 60 chars (e.g. `browse-js-no-await`). Skip if file already exists. Max 3 reports per session. File inline and continue — don't stop the workflow. Tell user: "Filed gstack field report: {title}"

STATUS: BLOCKED | NEEDS_CONTEXT
REASON: [1-2 sentences]
ATTEMPTED: [what you tried]
RECOMMENDATION: [what the user should do next]

_TEL_END=$(date +%s)
_TEL_DUR=$(( _TEL_END - _TEL_START ))
rm -f ~/.gstack/analytics/.pending-"$_SESSION_ID" 2>/dev/null || true
~/.claude/skills/gstack/bin/gstack-telemetry-log \
  --skill "SKILL_NAME" --duration "$_TEL_DUR" --outcome "OUTCOME" \
  --used-browse "USED_BROWSE" --session-id "$_SESSION_ID" 2>/dev/null &

_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

eval $(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null || echo "SLUG=unknown")
mkdir -p .gstack/benchmark-reports
mkdir -p .gstack/benchmark-reports/baselines

git diff $(gh pr view --json baseRefName -q .baseRefName 2>/dev/null || gh repo view --json defaultBranchRef -q .defaultBranchRef.name 2>/dev/null || echo main)...HEAD --name-only

$B goto <page-url>
$B perf

$B eval "JSON.stringify(performance.getEntriesByType('navigation')[0])"

$B eval "JSON.stringify(performance.getEntriesByType('resource').map(r => ({name: r.name.split('/').pop().split('?')[0], type: r.initiatorType, size: r.transferSize, duration: Math.round(r.duration)})).sort((a,b) => b.duration - a.duration).slice(0,15))"

$B eval "JSON.stringify(performance.getEntriesByType('resource').filter(r => r.initiatorType === 'script').map(r => ({name: r.name.split('/').pop().split('?')[0], size: r.transferSize})))"
$B eval "JSON.stringify(performance.getEntriesByType('resource').filter(r => r.initiatorType === 'css').map(r => ({name: r.name.split('/').pop().split('?')[0], size: r.transferSize})))"

$B eval "(() => { const r = performance.getEntriesByType('resource'); return JSON.stringify({total_requests: r.length, total_transfer: r.reduce((s,e) => s + (e.transferSize||0), 0), by_type: Object.entries(r.reduce((a,e) => { a[e.initiatorType] = (a[e.initiatorType]||0) + 1; return a; }, {})).sort((a,b) => b[1]-a[1])})})()"

{
  "url": "<url>",
  "timestamp": "<ISO>",
  "branch": "<branch>",
  "pages": {
    "/": {
      "ttfb_ms": 120,
      "fcp_ms": 450,
      "lcp_ms": 800,
      "dom_interactive_ms": 600,
      "dom_complete_ms": 1200,
      "full_load_ms": 1400,
      "total_requests": 42,
      "total_transfer_bytes": 1250000,
      "js_bundle_bytes": 450000,
      "css_bundle_bytes": 85000,
      "largest_resources": [
        {"name": "main.js", "size": 320000, "duration": 180},
        {"name": "vendor.js", "size": 130000, "duration": 90}
      ]
    }
  }
}

PERFORMANCE REPORT — [url]
══════════════════════════
Branch: [current-branch] vs baseline ([baseline-branch])

Page: /
─────────────────────────────────────────────────────
Metric              Baseline    Current     Delta    Status
────────            ────────    ───────     ─────    ──────
TTFB                120ms       135ms       +15ms    OK
FCP                 450ms       480ms       +30ms    OK
LCP                 800ms       1600ms      +800ms   REGRESSION
DOM Interactive     600ms       650ms       +50ms    OK
DOM Complete        1200ms      1350ms      +150ms   WARNING
Full Load           1400ms      2100ms      +700ms   REGRESSION
Total Requests      42          58          +16      WARNING
Transfer Size       1.2MB       1.8MB       +0.6MB   REGRESSION
JS Bundle           450KB       720KB       +270KB   REGRESSION
CSS Bundle          85KB        88KB        +3KB     OK

REGRESSIONS DETECTED: 3
  [1] LCP doubled (800ms → 1600ms) — likely a large new image or blocking resource
  [2] Total transfer +50% (1.2MB → 1.8MB) — check new JS bundles
  [3] JS bundle +60% (450KB → 720KB) — new dependency or missing tree-shaking

TOP 10 SLOWEST RESOURCES
═════════════════════════

undefined

PERFORMANCE BUDGET CHECK
════════════════════════
Metric              Budget      Actual      Status
────────            ──────      ──────      ──────
FCP                 < 1.8s      0.48s       PASS
LCP                 < 2.5s      1.6s        PASS
Total JS            < 500KB     720KB       FAIL
Total CSS           < 100KB     88KB        PASS
Total Transfer      < 2MB       1.8MB       WARNING (90%)
HTTP Requests       < 50        58          FAIL

Grade: B (4/6 passing)

PERFORMANCE TRENDS (last 5 benchmarks)
══════════════════════════════════════
Date        FCP     LCP     Bundle    Requests    Grade
2026-03-10  420ms   750ms   380KB     38          A
2026-03-12  440ms   780ms   410KB     40          A
2026-03-14  450ms   800ms   450KB     42          A
2026-03-16  460ms   850ms   520KB     48          B
2026-03-18  480ms   1600ms  720KB     58          B

TREND: Performance degrading. LCP doubled in 8 days.
       JS bundle growing 50KB/week. Investigate.