chore: run PR126 v4 final parser review gate

Author: TheHiddenObserver

.github/workflows/pr126-v4-final-parser-review.yml

@@ -0,0 +1,68 @@
+name: PR126 v4 final parser review
+
+on:
+  push:
+    branches: [agent/panel-p1-stage-c-covariance]
+    paths:
+      - 'dev/pr126_v4_final_parser_hardening.py'
+      - '.github/workflows/pr126-v4-final-parser-review.yml'
+
+permissions:
+  contents: write
+
+jobs:
+  parser-review:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: agent/panel-p1-stage-c-covariance
+          fetch-depth: 0
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: Apply post-promotion review fixes
+        run: python dev/pr126_v4_final_parser_hardening.py
+      - name: Install parser validation dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pytest 'jsonschema[format]'
+      - name: Run v4 parser and maintained canonical matrix
+        run: |
+          python -m pytest -q \
+            dev/tests/test_panel_stage_c_identifiability_frontend_source.py \
+            dev/tests/test_benchmark_frontend_data.py \
+            dev/tests/test_benchmark_catalog.py \
+            dev/tests/test_benchmark_inventory_v2.py \
+            dev/tests/test_frontend_contracts.py \
+            dev/tests/test_frontend_domain_coverage.py \
+            dev/tests/test_panel_stage_c_frontend_source.py
+      - name: Strict deterministic generator check
+        run: |
+          python dev/benchmarks/generate_benchmark_data.py --check --strict-sources
+      - name: Static and exact-source applicability gates
+        run: |
+          python -m compileall -q \
+            dev/benchmarks/frontend_data/parsers/panel_stage_c_identifiability.py \
+            dev/tests/test_panel_stage_c_identifiability_frontend_source.py
+          git diff --check
+          changed="$(git diff --name-only a99726e19c535dfcd0a94711bbc8be6aac437584...HEAD; git diff --name-only)"
+          if printf '%s\n' "$changed" | grep -E '^(statgpu/panel/|dev/benchmarks/validate_panel_stage_c_gpu.py$|dev/benchmarks/benchmark_panel_stage_c_covariance.py$|results/pr126_p100/panel_stage_c_(gpu_validation|performance)_a99726e1.json$)' ; then
+            echo 'Exact-source applicability violated by post-promotion review.'
+            exit 1
+          fi
+      - name: Commit validated parser hardening
+        run: |
+          git config user.name 'github-actions[bot]'
+          git config user.email '41898282+github-actions[bot]@users.noreply.github.com'
+          git rm -f \
+            .github/workflows/pr126-v4-final-parser-review.yml \
+            dev/pr126_v4_final_parser_hardening.py
+          git add \
+            dev/benchmarks/frontend_data/parsers/panel_stage_c_identifiability.py \
+            dev/tests/test_panel_stage_c_identifiability_frontend_source.py \
+            dev/reviews/pr126_round4_autofix_review_2026-08-12.md
+          git diff --cached --check
+          git commit -m 'test: harden PR126 v4 immutable parser contract'
+          git push origin HEAD:agent/panel-p1-stage-c-covariance