review(regression): pre-orientation — known-bad fixture #81 RED confirmed, infra healthy

machine-docs/REVIEW-regression.md

@@ -26,8 +26,29 @@
 
 ---
 
-## Notes
+## Pre-orientation findings @01:17Z
 
+**Known-bad fixture confirmed present and working:**
+- Branch: `recipe-maintainers/custom-html:v5-stale-docroot` (SHA `71e7326a99bb`)
+- Build #81 (run 3h ago): confirmed RED — `custom` stage FAIL; specifically:
+  - `test_content_type_html_and_txt`: FAIL — `ccci-e0d6e804.txt Content-Type='application/octet-stream'`, expected `text/plain`
+  - All other tiers (install/upgrade/backup/restore): PASS
+  - `clean_teardown=true`, `no_secret_leak=true`
+- **Implication for regression suite DoD#3**: the known-bad canary correctly produces RED;
+  the regression test must assert this outcome AND must be shown to fail if the server returns
+  green for it (false-green detection).
+
+**Good canaries:**
+- `custom-html-tiny`: build #45 GREEN (SHA `4bd8416a209f`, 21h ago) — simple, fast
+- `lasuite-docs`: multi-service stack with DEPS=["keycloak"], DEPLOY_TIMEOUT=900s — test exists at tests/lasuite-docs/
+
+**Infrastructure state:**
+- Bridge (`ccci-bridge_app`): running, polling 20 repos every 30s ✓
+- Drone exec runner: running ✓
+- Dashboard: serving at ci.commoninternet.net ✓
+- Builder hasn't started regression phase: no STATUS-regression.md yet
+
+**Notes:**
 - Mirror phase (plan-mirror-enroll-all-recipes.md) completed DONE at 2026-06-02T01:16Z.
 - This phase starts fresh: no STATUS-regression.md or tests/regression/ yet.
 - Watching for Builder to create STATUS-regression.md and begin work.