Writing: read docs/skills/shared/writing-rule.md before you write a durable artifact.

/analytics-audit — Event Taxonomy & Coverage

Deep-dive analytics analysis. Checks that tracking is configured, events follow a naming convention, key user funnels are instrumented, and dashboards exist. Invoke when /launch-check's analytics row shows WARN or FAIL.

Process

Step 1: SDK detection

Grep for analytics SDK initialization:

• Google Analytics / GA4: gtag, G-, UA-, analytics.js, @google-analytics
• Mixpanel: mixpanel.init, @mixpanel
• Amplitude: amplitude.init, @amplitude
• PostHog: posthog.init, posthog-js
• Plausible: plausible.io, data-domain
• Segment: analytics.load, @segment
• Custom: any track(, capture(, logEvent( patterns

Step 2: Event inventory

Find all tracking calls in the codebase and list them:

• Event name
• Where it fires (file + component/handler)
• Properties sent with the event
• Whether it has a consistent naming convention (snake_case, camelCase, verb_noun)

Step 3: Funnel coverage

Identify the core user funnels and check if each step is tracked:

Funnel	Steps to check
Signup	page_view → form_start → form_submit → signup_complete
Activation	first_login → key_action_completed → aha_moment
Purchase (if applicable)	pricing_view → plan_select → checkout_start → payment_complete
Retention	return_visit → feature_usage → session_duration

Step 4: Output

ANALYTICS AUDIT — <project> @ <sha>

SDK: <GA4 / Mixpanel / PostHog / none>
Total events found: <N>
Naming convention: <consistent / inconsistent / none>

| # | Area | Status | Finding |
|----|------|--------|---------|
| E1 | SDK | PASS | GA4 initialized in _app.tsx |
| E2 | Events | WARN | 8 events found, 3 use camelCase, 5 use snake_case |
| E3 | Signup funnel | FAIL | form_submit tracked but signup_complete missing |
| E4 | Dashboard | WARN | No dashboard URL found in config or docs |

Event inventory:
  signup_start (pages/signup.tsx:42)
  form_submit (components/SignupForm.tsx:89)
  page_view (auto, GA4 enhanced measurement)
  ...

Persist the run + render trend

After printing the findings table, persist via the shared audit-history lib so the analytics trend across runs becomes legible. See docs/agdr/AgDR-0019-audit-artefact-persistence.md.

Resolve project name + score + verdict

<project-name> from apexyard.projects.yaml (or basename + /handover reminder if unregistered).

Score: score = max(0, 100 - 25*critical - 10*high - 3*medium - 1*low). Verdict by worst-severity: critical/high → fail, medium → conditional, low/none → pass.

Persist + render

source "$(git rev-parse --show-toplevel)/.claude/hooks/_lib-audit-history.sh"

# Lowercase severity in the payload — the lib expects critical/high/medium/low/info.
payload=$(mktemp); cat > "$payload" <<'EOF'
{
  "schema_version": 1,
  "findings": [
    {"id": "E2", "severity": "medium", "status": "open", "summary": "Mixed event-naming conventions (snake_case + camelCase + Title Case)"},
    {"id": "E3", "severity": "high",   "status": "open", "summary": "signup_complete event missing — can't measure conversion"},
    {"id": "E4", "severity": "medium", "status": "open", "summary": "No dashboard URL found in config or docs"}
  ]
}
EOF

# Body: per templates/audits/analytics-audit.md
body=$(mktemp); cat > "$body" <<'EOF'
... (filled-in body — findings table + Event taxonomy gap + Recommended priority) ...
EOF

ts=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
audit_run_persist "<project-name>" "analytics-audit" "$ts" "fail" 60 "$body" < "$payload"
rm -f "$payload" "$body"

audit_render_trend "<project-name>" "analytics-audit" 5

Opt-in commit

touch projects/<name>/audits/analytics-audit/.audit-history-tracked

Rules

1. Auto-PASS for non-user-facing projects. CLIs, libraries, and internal tools don't need analytics.
2. Don't prescribe a specific SDK. Note what's configured, check coverage, suggest improvements.
3. Flag inconsistent naming — mixed conventions make dashboard queries painful.
4. Privacy-aware. Flag if PII (email, name, IP) is being sent in event properties.
5. Always persist via the lib. The persist step runs regardless of opt-in commit state.
6. Severity vocabulary in the JSON is lowercase. The lib expects critical/high/medium/low/info.

---

Part of ApexYard — multi-project SDLC framework for Claude Code · MIT.