CHANGELOG

• LAND-TURNSTILE — Cloudflare Turnstile integrated into /v1/check. Managed-mode widget (invisible for trusted users). 2-layer defense: Turnstile + rate limit.
• /changelog.html — This page. Full build history, reverse chronological.
• CSP hardened — challenges.cloudflare.com added to script/frame/connect allowlist.

• Hero Live Widget — direct check-from-landing, no page reload.
• Section reduction — 14 sections → 5. "Under The Hood" removed. Signal-to-noise improved.
• Demo Panel updated — real scan data. pickedby.ai 55/100. Notion 87.5/100. Scored across 4 dimensions.
• Newsletter section — weekly AI visibility digest. No spam, unsubscribe anytime.
• FAQ updated to 4-dimension model — Recognition 35 + Category 35 + CoRec 20 + Web 10 = 100.
• Audience language corrected — removed "creator-only" framing. Now: SaaS, D2C, agencies, launches.
• Badge Embed PREVIEW bug fixed — Shell mode sidebar navigation now correctly triggers updateBadgePreview().

Lighthouse: Performance 96 / Accessibility 90 / SEO 100

• Rivals tab — Sankey flow, Peers grid, Quadrant chart. See who AI recommends instead of you.
• /v1/rivals API — co-recommendation graph endpoint. Returns top competitors by AI mention frequency.
• GT-01 real measurement — Figma 95, Notion 87.5, Stripe 95. T1 3/3 products above 80. DEPLOY-GATE-01 #11 passed.
• Sankey fallback — graceful degradation when <3 rivals detected.

Lighthouse: Performance 91 / Accessibility 89 / SEO 100

• PROBE-REDESIGN-01 — D-type reverse Socratic probe replaces flat keyword matching. AI gradually narrows toward your product from category → feature → brand.
• probeCache.ts — 24h TTL cache reduces redundant LLM calls by ~60%.
• probeRedesign.ts — standalone module with 14 unit tests passing.
• Real-world accuracy — Notion scored 97.5 (T1 confirmed). pickedby.ai scored 55 (T2, emerging).

• Trend — Score history chart with 3 time windows: 30d / 12w / 12mo.
• Journey — 4-stage AI awareness timeline: Invisible → Noticed → Seen → Picked. Visual milestone tracker.
• Volume Metrics — 7 cards: total checks, streak, top score, category rank, co-rec count, web mentions, probe density.
• Chart.js integration — responsive line chart with gold accent, dark mode.

• 12 Overview sections — Score ring, Pass Indicator, 4-dimension bars, Engine Grades (GPT/Gemini/Claude/Grok/Perplexity), AI Probe log, Co-Rec grid, Category rank table, Web signals, Badge embed, Improvement tips, Quick re-check.
• Pass Indicator — 4-tier visual: 🏆 PERFECT (81+) / 🟢 STRONG (61+) / 🟡 EMERGING (36+) / 🔴 INVISIBLE (<36).
• sum==final math guarantee — Recognition 35 + Category 35 + CoRec 20 + Web 10 = finalScore. 10/10 test cases verified.

• Shell architecture — Left sidebar nav, center content panel, sticky top bar. State persisted in URL params.
• 5 tabs — Overview, Trend, Rivals, Tools, Settings. Tab state survives page refresh.
• Quick Check modal — inline product check without leaving the dashboard.
• Domain Picker — dropdown of verified domains. One-click switch between products.

• Domain Picker dropdown — verified domains appear as selectable items. Switching auto-loads last score.
• Ownership verification — meta tag + DNS TXT record methods. Verified badge (✓) displayed in sidebar.
• OWNER-ONLY-01 — only verified products are tracked in history and shown in My Products panel.

• Onboarding flow — 3-step guided setup: product name → URL → verification. Progress saved between sessions.
• Auto-check on login — last registered product auto-checked on dashboard open.
• 5× retry adapter — exponential backoff on AI probe failures. Reduces 429/timeout errors by ~72%.
• Daily Pulse email — score change notification, sent at 00:00 KST via Brevo SMTP.

• scores table — unified_v15 column added. Stores 4-dimension breakdown (Recognition, Category, CoRec, Web) alongside legacy score for backward compatibility.
• probe_logs table — per-engine probe results with template_id, recognized flag, tier classification.
• category_cache table — AI category lookup results cached per product. Reduces LLM calls by ~40%.
• Supabase RLS policies — row-level security enforced. Users can only read/write their own data.