Document legacy credential cleanup sign-off

Record certificate continuity, existing-user validation, and full-mix
target telemetry while preserving the documented evidence limits.

docs/agent/code-map.md

@@ -65,7 +65,7 @@ This is a semantic map, not a complete file inventory. Start here, then read the
 - Files: `src/web_server.{h,c}`, `src/web_serial_transport.{h,c}`, `src/web_ui.{h,c}`, `src/web_console.{h,c}`
 - Ordinary HTTPS idle cleanup: `src/web_httpd_idle.{c,h}`, owner sweep in `web_httpd_adapter.{c,h}`, lifecycle/TLS composition in `web_server.c`; `tests/web_httpd_idle/run.py`. Independent of diagnostics/optional transports: 15-second observed idle, one-second timer/one queued probe, six rows, actual WS/async/pending exemptions, safe current-owner shutdown and stop/restart fencing. No LRU/socket/timeout/stack increase. SDK queue/owner-delay limits and target checklist: `docs/https_idle_cleanup.md`.
 - Opt-in admission diagnostics: `src/web_diagnostics.{c,h}`, `tests/web_diagnostics/run.py`. Public synchronous HTTPS create/close callbacks publish six post-TLS connection records; four ticket/upgrade wrappers feed a 32-entry numeric ring. UART0/admin SSH `web diagnostics enable|disable|show|clear`; no queue/task/cleanup override or capacity change. Full bounds, SDK semantics and preaccept/TLS blind spots: `docs/phase8d11_implementation.md`.
-- Legacy removal: `user_database` persists missing storage empty and preserves valid v1 user bytes; private derived `v1_admin_marker`, no public bootstrap/migration/sync APIs. `web_security` privately migrates v1 1392-byte material to TLS-only v2 1340-byte material, exact identity/generation retained, commit before publish, fail closed without fallback overwrite. Credential commands removed; user generated passwords and TLS rotation remain. Contracts, downgrade and evidence limits: `docs/legacy_credential_removal.md`.
+- Legacy removal **user-signed-off 2026-09-08** (unchanged certificate fingerprint, preexisting users usable, full-mix evidence): `user_database` persists missing storage empty and preserves valid v1 user bytes; private derived `v1_admin_marker`, no public bootstrap/migration/sync APIs. `web_security` privately migrates v1 1392-byte material to TLS-only v2 1340-byte material, exact identity/generation retained, commit before publish, fail closed without fallback overwrite. Credential commands removed; user generated passwords and TLS rotation remain. Contracts, downgrade and evidence limits: `docs/legacy_credential_removal.md`.
 - Security files: `src/web_security.{h,c}`, `src/web_cookie_auth.{h,c}`, `src/web_session_store.{h,c}`, `src/web_auth_parse.{h,c}`. Private IDF boundary: `src/web_httpd_adapter.{h,c}`.
 - Asset files: authored/generated boundary in `src/web_assets_data.{h,c}`, `web_assets/SOURCES.md`, `web_assets/generate_embedded_assets.py`
 - Interfaces: web init/start/stop/snapshots; HTTP handlers; ticket mint/consume; attach/detach; targeted session revocation

docs/agent/current-state.md

@@ -4,6 +4,10 @@ This file is working memory. Update it during active work and before handoff; do
 
 ## Development state
 
+- **Legacy-credential cleanup signed off (2026-09-08):** User explicitly accepts cleanup, confirms unchanged HTTPS certificate fingerprint and continued use of preexisting test users, supplementing the clean full-mix telemetry below. Supersedes prior target-pending/fingerprint-unconfirmed status for this cleanup; idle-cleanup scoped acceptance stands. User suspects two boot auth failures were stale pre-flash sessions in two browser tabs; plausible, not traced/confirmed. Exact acceptance and limits: `docs/legacy_credential_removal.md`. No unreported blank provisioning/recovery/fault-injection/soak/all-key checks, numeric reserve approval or broader phase/M3 acceptance inferred. Documentation only; no source/config/build/test/device/assets/commit action.
+
+- **Post-legacy-removal target evidence (2026-09-08):** User provides 60-second boot/full-mix telemetry and reports substantial traffic. Five accounts/two admins; two SSH public-key sessions and two browser password logins operational. USB writer16, SSH observer9, web observers10/11, both admin consoles active at 230400 8N1 RTS/CTS DTR active. Serial WS connect2/disconnect0, admin1/0, all supplied web send/queue/protocol/close and SSH handshake/auth/IO failure counters zero; tickets all consumed/no expiry. Two web auth failures already present at boot unchanged under load, zero invalid login credentials; request origin unknown. Boot internal/DMA/PSRAM free66,488/58,732/8,246,148 B; loaded31,820/24,064/8,112,076 B, minima15,740/7,984/8,074,196 B, largest20,480/20,480/7,995,392 B. SSH stack minimum-free18,476 boot/16,284 loaded B. Exact counters/evidence limits in `docs/legacy_credential_removal.md`. No certificate fingerprint comparison, blank provisioning/recovery, all-key verification, exact revision/duration or explicit sign-off supplied; browser RX0 and no broker drop counters prevent all-route/bidirectional/lossless claims. No source/build/device action; documents only.
+
 - **Legacy credential removal (2026-09-08), implemented/host-tested/build-verified; target pending:** New database and TLS module contracts inspected. Missing user storage commits empty; normal UART0 `user add <username> admin [--generate]` provisions the first administrator. Unavailable-only UART0 recovery rebuilds empty and refuses healthy storage. Existing valid user v1 bytes stay unchanged; private derived `v1_admin_marker`, no public bootstrap/migration/sync API. HTTPS private v1 reader migrates `web_sec/material` 1392 → TLS-only v2 1340 bytes, retaining exact DER/fingerprint/generation, committing before publication; failures fail closed without fallback replacement. Legacy credential commands removed; generated user passwords and TLS rotation retained; reset is TLS-only. Older v1-only firmware cannot read v2; logical NVS replacement is not secure flash wiping, and no factory erase is required. Startup integration complete; SSH gate independent of HTTPS identity, obsolete completion/policy entries removed. Parent security15, canonical accounts, policy/startup64-gate combinations, console lifecycle, cookie accounts, idle18+guards and build/diff checks PASS. Integration agent reports broad auth/transport/lifecycle/UI regression PASS. Review no actionable findings; final agent-added sparse populated v1 reload/authorization regression PASS, test-only extension. Parent final production build 3.93 s, 99,260 B RAM / 1,705,781 B flash (−56/−3,200 vs idle-cleanup baseline). Host NVS doubles do not prove flash/power-loss behavior; no independently captured old-device TLS fixture or hardware validation. Record: `docs/legacy_credential_removal.md`.
 
 - **Scoped user report — HTTPS idle cleanup worked (2026-09-08):** User accepted that the cleanup worked. This supersedes the no-target-acceptance wording for that specific behavior below, not the historical measurements. No additional soak duration, detailed checklist passes, resource reserve approval, broader 8D.11/M3 sign-off or legacy-removal target validation was supplied.