docs: add onboarding audit log (onboarding-audit-agent)

Co-authored-by: PR0M3TH3AN <[email protected]>

docs/agents/task-logs/daily/2026-02-18_18-05-15_onboarding-audit-agent_completed.md

@@ -0,0 +1,26 @@
+# Onboarding Audit Report
+
+**Status:** ✓ Onboarding passes from clean checkout
+
+**Environment:**
+- Node: v22.22.0
+- npm: v11.7.0
+- OS: Linux (sandbox)
+
+**Steps Executed:**
+1. `npm ci` - Pass
+2. `npx playwright install` - Pass
+3. `npm run build` - Pass (Verified build artifacts; used in place of interactive `npm start`)
+4. `npm run test:unit:shard1` - Pass
+5. `npm run test:smoke` - Pass
+6. `npm run format` - Pass
+7. `npm run lint` - Pass
+
+**Observations:**
+- `README.md` and `CONTRIBUTING.md` instructions are accurate and work as expected.
+- Dependencies (`nostr-tools`) were correctly installed via `npm ci`.
+- No regressions found in onboarding flow.
+
+**Actions:**
+- No documentation updates required.
+- No devcontainer changes required.