S00-028: Record blocked task and remediation handoff

Changes: Preserve incomplete work and blocker metadata for S00-028. This checkpoint does not mark implementation accepted.
Validation: Session ended with status blocked.
Blocker: S00-028 cannot independently validate project filesystem sandbox: installed Codex sandbox exits before command execution because the app-server socket directory must be user-owned with mode 0700. Host socket repair is outside launcher arguments scope.
Automatic blocker limit reached; explicit external resolution required.

Task: S00-028
Agent: auto-ci-cd-211cf3a2bd08
Role: ci-cd
Action: claim
Status: blocked

Task title: Repair conflicting Codex harness sandbox arguments

state/issues/S00-028-auto-ci-cd-211cf3a2bd08.json

@@ -0,0 +1,28 @@
+{
+  "title": "Provide a valid Codex sandbox app-server socket directory",
+  "reason": "S00-028 cannot independently validate project filesystem sandbox: installed Codex sandbox exits before command execution because the app-server socket directory must be user-owned with mode 0700. Host socket repair is outside launcher arguments scope.",
+  "reproduction": "codex -c 'sandbox_mode=\"workspace-write\"' -c sandbox_workspace_write.network_access=true sandbox -- python3 -c '<synthetic project write/read/remove probe>' exits 1: error building bubblewrap command: app-server socket directory must be a user-owned directory with mode 0700. See state/evidence/S00-028-auto-ci-cd-211cf3a2bd08.md.",
+  "role": "ci-cd",
+  "reviewer_role": "qa",
+  "scope": [
+    "docs/AUTOMATION.md"
+  ],
+  "outcome": "Coordinator provides a valid private app-server socket environment and a bounded no-model Codex sandbox probe executes with project write restrictions intact.",
+  "steps": [
+    "Read S00-028 evidence and coordinate host socket environment ownership/mode correction without changing product files",
+    "Document the supplied supported host setup in docs/AUTOMATION.md",
+    "Run a bounded no-model project write/read/remove and filesystem restriction diagnostic",
+    "Record evidence and submit for independent QA"
+  ],
+  "acceptance": [
+    "Codex sandbox no longer fails with the socket directory ownership/mode error",
+    "Project write sandbox remains enforced without bypass or broader writable roots",
+    "No storage task or additional model is executed"
+  ],
+  "checks": [
+    "Bounded codex sandbox diagnostic executes a synthetic project write/read/remove probe",
+    "Verify effective filesystem restrictions and record exact exit codes"
+  ],
+  "depends_on": [],
+  "requires_user_input": true
+}