snapapi: session 54 — cancelled tier fix, security improvements, 338 tests

projects/snapapi/memory/sessions.md

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 # SnapAPI Session Log
 
+## Session 54 — 2026-03-04 09:00 CET (Business Logic & Security Fixes)
+
+**Goal:** Fix discovered business logic bug + security improvements.
+
+**Health Check:**
+- Production: ✅ healthy, 2 replicas, 6+ days uptime (still v0.5.2, VULNERABLE)
+- Staging: ✅ healthy, deployed 9575d31
+
+**Work Done:**
+
+### 1. BUG-017: Cancelled subscriptions get free tier (MEDIUM) — sub-agent: snapapi-dev-fixes
+- `downgradeByCustomer()` was setting tier to `'free'` (100 req/mo) instead of blocking access
+- Added `'cancelled'` tier with 0-request limit
+- TDD: tests written first, 338 tests passing
+
+### 2. BUG-018: Recovery endpoint logs full API keys (LOW)
+- Removed full key from logger call, only logs email now
+- Prevents key theft via log access
+
+### 3. BUG-019: No rate limiting on billing endpoints (MEDIUM)
+- Added 10 req/15min IP rate limit on checkout/portal/recover
+- Webhook endpoint excluded (Stripe needs unrestricted access)
+- Rate limit headers returned in responses
+
+### Confirmed: Production still vulnerable (BUG-016)
+- Tested `POST /v1/signup/free` on production — returns 200 + creates API key
+- Cleaned up test key from DB
+- Fixed on staging but NEEDS production deploy
+
+**Test Suite:** 338 tests passing (up from 334), 1 pre-existing skip
+
+**TDD Compliance:** ✅ All tests written before implementation
+
+**Git Commits:**
+- `9575d31` fix: cancelled tier, remove key logging, add billing rate limits
+
+**Investor Test:**
+1. Stranger trust with money? **Yes on staging**
+2. Data loss on crash? **No** (CNPG PostgreSQL)
+3. Free tier abuse? **⚠️ YES on production** — /v1/signup/free still generates keys
+4. Key recovery? **Yes on staging**
+5. All website features work? **Yes on staging**
+
+**⚠️ URGENT: Production deploy still needed.** BUG-016 (free signup) is a security vulnerability. No abuse detected but the endpoint is discoverable. Requesting investor approval for production deploy (staging → prod).
+
+**Blockers:**
+- **Production deploy: URGENT** — security fix + all staging improvements
+- Stripe production webhook: needs investor
+- CI/CD: No Forgejo runner (manual docker build workaround)
+
+---
+
 ## Session 53 — 2026-03-03 21:00 CET (Security Fix: Free Signup Route)
 
 **Goal:** Evening housekeeping — discovered and fixed a security vulnerability.