S00-031: Document verified host context for the Codex sandbox probe

Changes: Add host-specific socket mask diagnosis and bounded inner workspace-write invocation to automation guidance; record independent evidence and QA handoff.
Validation: Approved host stat confirmed uid1000/mode0700; no-model inner sandbox exited 0 with project write/read/remove and outside write denial EROFS30. Final make check passed 72 tests and git diff --check passed. Initial verbose draft exceeded prompt budgets; compacted guidance passed the rerun. No storage task or model executed.

Task: S00-031
Agent: auto-ci-cd-d45ccd3ee7d6
Role: ci-cd
Action: claim
Status: review

Task title: Supply a verified private Codex app-server socket environment

state/tasks.json

@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "revision": 97,
+  "revision": 99,
   "tasks": {
     "S00-001": {
       "status": "done",
@@ -1433,10 +1433,14 @@
       "handoff": "state/handoffs/S00-030.md"
     },
     "S00-031": {
-      "status": "todo",
-      "owner": null,
+      "status": "review",
+      "owner": "auto-ci-cd-d45ccd3ee7d6",
       "external_wait": false,
-      "reason": "New verified root cause and supported host execution context supplied in state/handoffs/S00-031.md. Actual host /tmp/codex-daemon-1000 uid1000/mode0700 is valid; outer sandbox deliberately masks it read-only mode000. Installed-version primary source confirms this design; TMPDIR/no-daemon cannot fix nested guard. Approved OUTER HOST EXECUTION of bounded no-model inner codex workspace-write probe passes project write/read/remove and denies outside write EROFS30, no outside file created. No socket mutation or broader roots. Fresh executor/QA must read handoff, request approved outer host execution and independently repeat, document and review; no task acceptance claimed."
+      "reason": null,
+      "started_at": "2026-10-15T10:38:13+00:00",
+      "updated_at": "2026-10-15T10:41:56+00:00",
+      "evidence": "state/evidence/S00-031-auto-ci-cd-d45ccd3ee7d6.md",
+      "handoff": "state/handoffs/S00-031.md"
     }
   },
   "events": [
@@ -2658,6 +2662,29 @@
       "task": "S00-031",
       "agent": "coordinator-input-s00-031",
       "reason": "New verified root cause and supported host execution context supplied in state/handoffs/S00-031.md. Actual host /tmp/codex-daemon-1000 uid1000/mode0700 is valid; outer sandbox deliberately masks it read-only mode000. Installed-version primary source confirms this design; TMPDIR/no-daemon cannot fix nested guard. Approved OUTER HOST EXECUTION of bounded no-model inner codex workspace-write probe passes project write/read/remove and denies outside write EROFS30, no outside file created. No socket mutation or broader roots. Fresh executor/QA must read handoff, request approved outer host execution and independently repeat, document and review; no task acceptance claimed."
+    },
+    {
+      "revision": 98,
+      "at": "2026-10-15T10:38:13+00:00",
+      "action": "claim",
+      "task": "S00-031",
+      "agent": "auto-ci-cd-d45ccd3ee7d6",
+      "role": "ci-cd",
+      "from": "todo",
+      "to": "in_progress",
+      "reason": null
+    },
+    {
+      "revision": 99,
+      "at": "2026-10-15T10:41:56+00:00",
+      "action": "submit",
+      "task": "S00-031",
+      "agent": "auto-ci-cd-d45ccd3ee7d6",
+      "role": null,
+      "from": "in_progress",
+      "to": "review",
+      "reason": null,
+      "evidence": "state/evidence/S00-031-auto-ci-cd-d45ccd3ee7d6.md"
     }
   ],
   "retired_agents": [