diff --git a/docs/evidence/gen2-compat-obs-001-production-deploy-blocked-2026-08-30.json b/docs/evidence/gen2-compat-obs-001-production-deploy-blocked-2026-08-30.json
new file mode 100644
index 0000000..c493a56
--- /dev/null
+++ b/docs/evidence/gen2-compat-obs-001-production-deploy-blocked-2026-08-30.json
@@ -0,0 +1,46 @@
+{
+  "task_id": "GEN2-COMPAT-OBS-001",
+  "status": "BLOCKED_BY_DEPLOYMENT_CONTROL",
+  "observed_at_utc": "2026-08-30T10:37:07.7219511Z",
+  "browser_connector": {
+    "authenticated_tab_visible": true,
+    "stale_login_tab_also_present": true,
+    "cookies_tokens_or_passwords_read": false
+  },
+  "requested_candidate_revision": "87ec7efd0fa7bdbed22c1c0c67d671907029d7bb",
+  "candidate_prepare": "not_completed_as_a_safe_release_set_promotion",
+  "failure": {
+    "phase": "candidate creator startup after cognitive readiness",
+    "result": "stable container IDs changed despite candidate-only --no-deps; Supervisor control became temporarily unavailable",
+    "stable_ids_before": {
+      "creator-web": "4df348752f1a6def05acb1934bfc23048902ad6f235a7da967806d481e9ce7b7",
+      "core-runtime": "a739d2d5c713dde575f571b38e58ec33143994aa9e3bcc2f5d5fc765a50e1796",
+      "cognitive-worker": "a33d61b32116711287a166e0cce6362dc10de321f920549ef8a344fe0b5efb2d",
+      "research-runtime": "88cfade5cdce288576b1c73493f83c84d915ac82c3d16dc6d3fedb9579a4ba8c"
+    },
+    "stable_ids_after": {
+      "creator-web": "5181e5c6b48eaed6c6ea85eff5668c0e675b72bb982eb9425d6f39f899378ec9",
+      "core-runtime": "641e8f7ae8177e4638cf806d9be1bb6f8b5ac028deb0c0c410c6ff4139032bd5",
+      "cognitive-worker": "2e6d46f5b533cfeda261ceafd65ad5b5873b8aa8166bffc4ae91033a6c994d0a",
+      "research-runtime": "b15d9b0e116fbd18fa726e33541ef11fe1bafe4a85210ab5ee500466a20b400b"
+    },
+    "stable_ids_unchanged": false,
+    "cause": "external production updater/Compose reconcile reacts to production checkout or candidate Compose operation; --no-deps alone does not isolate stable in this control plane"
+  },
+  "recovery": {
+    "traffic_mode": "STABLE",
+    "revision": "91f0c9e7999907a4ee7665b77742dd452c18b17b",
+    "healthz": 200,
+    "readyz": 200,
+    "supervisor_baseline_aligned": true,
+    "data_or_volumes_deleted": false
+  },
+  "observation": {
+    "authenticated_workload_sent": false,
+    "telemetry_promoted": false,
+    "baseline_started": false,
+    "tag_created": false,
+    "v1_paths_deleted": false
+  },
+  "required_follow_up": "deployment control plane must isolate candidate Compose project or disable updater reconcile before safe ReleaseSet promotion"
+}