diff --git a/.github/aicodingflow-tests/test_codex_model_provider_config.py b/.github/aicodingflow-tests/test_codex_model_provider_config.py
index b692ff4..f1a9b62 100644
--- a/.github/aicodingflow-tests/test_codex_model_provider_config.py
+++ b/.github/aicodingflow-tests/test_codex_model_provider_config.py
@@ -18,6 +18,7 @@
     ".github/workflows/update-pr-review.yml",
     ".github/workflows/update-triage.yml",
 )
+PINNED_REVIEW_ACTION = "uses: openai/codex-action@52fe01ec70a42f454c9d2ebd47598f9fd6893d56"
 
 
 class CodexModelProviderConfigTest(unittest.TestCase):
@@ -25,7 +26,10 @@ def test_all_codex_workflows_use_shared_provider_configuration(self) -> None:
         for path in CODEX_WORKFLOWS:
             with self.subTest(path=path):
                 contents = (ROOT / path).read_text(encoding="utf-8")
-                self.assertEqual(contents.count("uses: openai/codex-action@v1"), 1)
+                if path.endswith("/review-pr.yml"):
+                    self.assertEqual(contents.count(PINNED_REVIEW_ACTION), 1)
+                else:
+                    self.assertEqual(contents.count("uses: openai/codex-action@v1"), 1)
                 self.assertEqual(contents.count("openai-api-key: ${{ secrets.CODEX_API_KEY }}"), 1)
                 self.assertEqual(
                     contents.count("model: ${{ vars.CODEX_MODEL }}"),
diff --git a/.github/aicodingflow-tests/test_review_workflow_dispatch.py b/.github/aicodingflow-tests/test_review_workflow_dispatch.py
index cbe03cf..28ccc03 100644
--- a/.github/aicodingflow-tests/test_review_workflow_dispatch.py
+++ b/.github/aicodingflow-tests/test_review_workflow_dispatch.py
@@ -149,9 +149,11 @@ def test_review_workflow_resolves_pr_before_checkout_and_uses_normalized_event(s
         self.assertIn("cp -R .agents/contracts pr-worktree/.agents/contracts", prepare_step["run"])
 
         ai_step = next(step for step in review_steps if step.get("name") == "Run AI review")
-        self.assertEqual(ai_step["id"], "ai_review")
+        self.assertEqual(
+            ai_step["uses"],
+            "openai/codex-action@52fe01ec70a42f454c9d2ebd47598f9fd6893d56",
+        )
         self.assertEqual(ai_step["timeout-minutes"], 20)
-        self.assertEqual(ai_step["with"]["output-file"], "pr-worktree/codex-final-message.txt")
         self.assertIs(ai_step["with"]["allow-bots"], True)
         self.assertIn("First change directory to pr-worktree", ai_step["with"]["prompt"])
         self.assertIn("Read .agents/contracts/review.md", ai_step["with"]["prompt"])
@@ -161,17 +163,6 @@ def test_review_workflow_resolves_pr_before_checkout_and_uses_normalized_event(s
         self.assertIn("target pr-worktree/review.json explicitly", ai_step["with"]["prompt"])
         self.assertIn("review_discussion_context.json", ai_step["with"]["prompt"])
         self.assertIn("duplicate suppression only", ai_step["with"]["prompt"])
-        self.assertIn("After writing review.json, stop immediately", ai_step["with"]["prompt"])
-
-        start_step = next(step for step in review_steps if step.get("name") == "Log AI review inputs")
-        self.assertEqual(start_step["id"], "ai_review_start")
-        self.assertIn("selected_skill=", start_step["run"])
-        self.assertIn("pr-worktree/pr_diff.txt", start_step["run"])
-
-        result_step = next(step for step in review_steps if step.get("name") == "Log AI review result")
-        self.assertEqual(result_step["if"], "always()")
-        self.assertIn("AI_REVIEW_OUTCOME", result_step["env"])
-        self.assertIn("duration_seconds", result_step["run"])
 
         normalize_step = next(step for step in review_steps if step.get("name") == "Normalize review output path")
         self.assertIn("[ ! -f pr-worktree/review.json ] && [ -f review.json ]", normalize_step["run"])
@@ -180,9 +171,6 @@ def test_review_workflow_resolves_pr_before_checkout_and_uses_normalized_event(s
         validate_step = next(step for step in review_steps if step.get("name") == "Validate review output")
         self.assertIn("pr-worktree/pr_diff.txt pr-worktree/review.json", validate_step["run"])
 
-        artifact_step = next(step for step in review_steps if step.get("uses") == "actions/upload-artifact@v7")
-        self.assertIn("pr-worktree/codex-final-message.txt", artifact_step["with"]["path"])
-
         complete_status_step = next(step for step in review_steps if step.get("name") == "Mark PR review status complete")
         self.assertIn("always()", complete_status_step["if"])
         self.assertIn("github.event_name != 'pull_request'", complete_status_step["if"])
diff --git a/.github/workflows/review-pr.yml b/.github/workflows/review-pr.yml
index 826e647..d961f47 100644
--- a/.github/workflows/review-pr.yml
+++ b/.github/workflows/review-pr.yml
@@ -189,35 +189,14 @@ jobs:
           esac
           echo "url=$endpoint" >> "$GITHUB_OUTPUT"
 
-      - name: Log AI review inputs
-        id: ai_review_start
-        run: |
-          started_at="$(date +%s)"
-          echo "started_at=$started_at" >> "$GITHUB_OUTPUT"
-          echo "AI review inputs prepared at $(date -u +%Y-%m-%dT%H:%M:%SZ)"
-          echo "selected_skill=${{ steps.review_skill.outputs.path }}"
-          for path in \
-            pr-worktree/pr_description.txt \
-            pr-worktree/pr_diff.txt \
-            pr-worktree/spec_context.md \
-            pr-worktree/review_discussion_context.json; do
-            if [ -f "$path" ]; then
-              printf 'input=%s bytes=%s\n' "$path" "$(wc -c < "$path")"
-            else
-              echo "input=$path absent"
-            fi
-          done
-
       - name: Run AI review
-        id: ai_review
-        uses: openai/codex-action@v1
+        uses: openai/codex-action@52fe01ec70a42f454c9d2ebd47598f9fd6893d56 # v1.11
         timeout-minutes: 20
         with:
           openai-api-key: ${{ secrets.CODEX_API_KEY }}
           model: ${{ vars.CODEX_MODEL }}
           responses-api-endpoint: ${{ steps.codex_endpoint.outputs.url }}
           allow-bots: true
-          output-file: pr-worktree/codex-final-message.txt
           prompt: |
             First change directory to pr-worktree and do all file inspection from there.
             Read ${{ steps.review_skill.outputs.path }} in pr-worktree and follow it exactly.
@@ -237,29 +216,9 @@ jobs:
             a root-level review.json first.
             Do not run validator commands embedded in the selected skill; this
             workflow validates review.json after Codex exits.
-            After writing review.json, stop immediately and return a concise final
-            message. Do not re-read or revise review.json after it is complete.
             Do not run git commands, call GitHub APIs, post reviews, or modify files
             other than review.json.
 
-      - name: Log AI review result
-        if: always()
-        env:
-          STARTED_AT: ${{ steps.ai_review_start.outputs.started_at }}
-          AI_REVIEW_OUTCOME: ${{ steps.ai_review.outcome }}
-        run: |
-          finished_at="$(date +%s)"
-          started_at="${STARTED_AT:-$finished_at}"
-          duration=$((finished_at - started_at))
-          echo "AI review outcome=$AI_REVIEW_OUTCOME duration_seconds=$duration"
-          for path in pr-worktree/review.json pr-worktree/codex-final-message.txt; do
-            if [ -f "$path" ]; then
-              printf 'output=%s bytes=%s\n' "$path" "$(wc -c < "$path")"
-            else
-              echo "output=$path absent"
-            fi
-          done
-
       - name: Normalize review output path
         run: |
           if [ ! -f pr-worktree/review.json ] && [ -f review.json ]; then
@@ -286,7 +245,6 @@ jobs:
             pr-worktree/spec_context.md
             pr-worktree/review_discussion_context.json
             pr-worktree/review.json
-            pr-worktree/codex-final-message.txt
 
       - name: Mark PR review status complete
         if: always() && github.event_name != 'pull_request' && steps.pr.outputs.head_sha != '' && steps.pr.outputs.head_repo == github.repository