S00-020: Record blocked task and remediation handoff

Changes: Preserve incomplete work and blocker metadata for S00-020. This checkpoint does not mark implementation accepted.
Validation: Session ended with status blocked.
Blocker: Previous runner session was interrupted before submit/escalate; processes stopped. User now explicitly requests resuming development. Preserve partial artifacts, verify them in a fresh bounded remediation, and return original to a new executor only after independent review.

Task: S00-020
Agent: auto-ci-cd-5a18c8aa1b42
Role: ci-cd
Action: claim
Status: blocked

Task title: Restore access to the pinned Linux XMPP experiment toolchain

state/tasks.json

@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "revision": 64,
+  "revision": 65,
   "tasks": {
     "S00-001": {
       "status": "done",
@@ -1282,12 +1282,18 @@
       "completed_at": "2026-10-14T19:52:28+00:00"
     },
     "S00-020": {
-      "status": "in_progress",
+      "status": "blocked",
       "owner": "auto-ci-cd-5a18c8aa1b42",
       "external_wait": false,
-      "reason": null,
+      "reason": "Previous runner session was interrupted before submit/escalate; processes stopped. User now explicitly requests resuming development. Preserve partial artifacts, verify them in a fresh bounded remediation, and return original to a new executor only after independent review.",
       "started_at": "2026-10-15T07:27:20+00:00",
-      "updated_at": "2026-10-15T07:27:20+00:00"
+      "updated_at": "2026-10-15T09:33:15+00:00",
+      "blocked_by": [
+        "S00-024"
+      ],
+      "resume_status": "in_progress",
+      "blocker_report": "state/blockers/S00-024.md",
+      "handoff": "state/handoffs/S00-020.md"
     },
     "S00-021": {
       "status": "done",
@@ -1313,6 +1319,12 @@
       "owner": null,
       "external_wait": false,
       "reason": null
+    },
+    "S00-024": {
+      "status": "todo",
+      "owner": null,
+      "external_wait": false,
+      "reason": null
     }
   },
   "events": [
@@ -2137,6 +2149,18 @@
       "from": "in_progress",
       "to": "blocked",
       "reason": "Previous runner session was interrupted before submit/escalate; processes stopped. User now explicitly requests resuming development. Preserve partial artifacts, verify them in a fresh bounded remediation, and return original to a new executor only after independent review."
+    },
+    {
+      "revision": 65,
+      "at": "2026-10-15T09:33:15+00:00",
+      "action": "escalate",
+      "task": "S00-020",
+      "resolution_task": "S00-024",
+      "agent": "auto-ci-cd-5a18c8aa1b42",
+      "role": "ci-cd",
+      "from": "in_progress",
+      "to": "blocked",
+      "reason": "Previous runner session was interrupted before submit/escalate; processes stopped. User now explicitly requests resuming development. Preserve partial artifacts, verify them in a fresh bounded remediation, and return original to a new executor only after independent review."
     }
   ],
   "retired_agents": [
@@ -2152,6 +2176,7 @@
     "auto-protocol-59f4d359b339",
     "auto-crypto-8bf3dcf711b9",
     "auto-crypto-fe1c81c17ded",
-    "auto-storage-88c3286c6641"
+    "auto-storage-88c3286c6641",
+    "auto-ci-cd-5a18c8aa1b42"
   ]
 }