fix(strix): accept legal Packrat fixture paths

.github/workflows/strix-changed-path-quality-ci.yml

@@ -0,0 +1,58 @@
+name: Strix Changed Path Quality CI
+
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - ".github/workflows/strix-changed-path-quality-ci.yml"
+      - "CHANGELOG.md"
+      - "docs/doctoring/strix-legal-git-paths.md"
+      - "scripts/ci/strix_quick_gate.sh"
+      - "tests/test_strix_changed_path_policy.py"
+      - "tests/test_strix_workflow_dependency_hashes.py"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: strix-changed-path-quality-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  exact-head-path-policy:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    steps:
+      - name: Checkout exact source revision
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          persist-credentials: false
+
+      - name: Set up Python
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        with:
+          python-version: "3.14"
+
+      - name: Install exact hash-verified test runner dependencies
+        env:
+          PIP_DISABLE_PIP_VERSION_CHECK: "1"
+          PIP_NO_INPUT: "1"
+        run: >-
+          python -m pip install --only-binary=:all: --require-hashes
+          coverage==7.15.2 --hash=sha256:b9a6367e4aff723e8ee8190836836124284e8fcd4265e307c844010cfa074f3f
+          iniconfig==2.1.0 --hash=sha256:9deba5723312380e77435581c6bf4935c94cbfab9b1ed33ef8d238ea168eb760
+          packaging==26.2 --hash=sha256:5fc45236b9446107ff2415ce77c807cee2862cb6fac22b8a73826d0693b0980e
+          pluggy==1.6.0 --hash=sha256:e920276dd6813095e9377c0bc5566d94c932c33b27a3e3945d8389c374dd4746
+          pygments==2.20.0 --hash=sha256:81a9e26dd42fd28a23a2d169d86d7ac03b46e2f8b59ed4698fb4785f946d0176
+          pytest==9.1.1 --hash=sha256:37a86b45efb9a47a61a36449063e8e18d0cab3161329fc099eb21783169c4f0c
+
+      - name: Verify exact-head path policy and syntax
+        shell: bash --noprofile --norc -e -o pipefail {0}
+        run: |
+          test "$(git rev-parse HEAD)" = "${{ github.event.pull_request.head.sha || github.sha }}"
+          python -m coverage run -m pytest tests -q
+          python -m compileall -q tests/test_strix_changed_path_policy.py tests/test_strix_workflow_dependency_hashes.py
+          bash -n scripts/ci/strix_quick_gate.sh
+          git diff --exit-code

CHANGELOG.md

@@ -12,5 +12,6 @@ Semantic Versioning where the repository publishes a release.
 
 ### Fixed
 
+- Allowed commas and ASCII parentheses in the bounded Strix changed-file path policy so legal tracked Packrat fixtures can receive exact-head security analysis, while rejecting raw `..` components before normalization and keeping controls, backslashes, whitespace ambiguity, and shell punctuation fail-closed.
 - Bound both trusted-uv quality jobs to `github.event.pull_request.head.sha` and added a permanent two-checkout regression contract so exact-head compatibility, coverage, docstring, and compilation claims cannot silently measure GitHub's generated pull-request merge revision.
 - Made Strix treat only a single LiteLLM provider-error line containing NVIDIA NIM context and model-catalog 404 evidence as cross-model fallback evidence, rejecting cross-line signal assembly and provider-like target source literals; moved the public default to Nemotron 3 Super 120B and added a second NVIDIA hosted candidate before GitHub Models without neutralizing reported vulnerabilities.

docs/doctoring/strix-legal-git-paths.md

@@ -0,0 +1,116 @@
+# Strix legal Git path compatibility
+
+## Incident and buyer impact
+
+The organization-required Strix quick gate rejected the exact changed-file list
+for `ContextualWisdomLab/aFIPC#160` at head
+`804ea97cd83144f94c5020a9d42f2573cc8cb442`. The pull request deletes generated
+Packrat artifacts, including the tracked fixture path
+`Ugly, but legal, path for a project (long)`. The central gate classified that
+path as unsafe solely because its comma and parentheses were absent from the
+bounded ASCII allowlist. Security analysis therefore stopped before examining
+the pull request, leaving a valid supply-chain cleanup without exact-head Strix
+evidence.
+
+## Decision
+
+The normalizer now admits comma and ASCII parentheses. No other punctuation is
+broadened. Existing fail-closed controls remain authoritative:
+
+- empty, dot, absolute, leading/trailing-whitespace, NUL, CR, LF, and
+  backslash forms are rejected;
+- raw `..` components are rejected before `posixpath.normpath()` can collapse
+  an embedded traversal such as `safe/../target.txt`;
+- shell metacharacters such as semicolon, dollar sign, backtick, pipe, and
+  ampersand remain rejected;
+- only the existing Unicode letter, combining-mark, and number categories are
+  accepted outside ASCII;
+- `Path.resolve(strict=False)` followed by `relative_to()` proves containment
+  beneath the trusted repository root; and
+- downstream Git and filesystem operations receive normalized paths as quoted
+  arguments, never as executable shell source.
+
+This is a compatibility correction, not a general relaxation to every pathname
+byte Git can represent. The privileged scanner intentionally retains a smaller,
+audited path policy.
+
+## Test-first evidence
+
+`tests/test_strix_changed_path_policy.py` extracts and executes the exact Python
+normalizer embedded in `scripts/ci/strix_quick_gate.sh`. The materializer first
+requires the historical Packrat fixture regression to fail on protected main,
+then applies the narrow allowlist change and requires the same test to pass.
+A test-only exact-head commit first demonstrated that `safe/../target.txt`
+passed after normalization; the production repair now rejects its raw `..`
+component before normalization. Permanent tests preserve established punctuation
+and reject traversal, absolute paths, controls, whitespace ambiguity, backslashes,
+and representative shell punctuation. The dedicated workflow runs the complete
+repository test suite through coverage.py and pytest whenever code or either
+authoritative contract document changes.
+
+## Workflow dependency integrity
+
+The exact-head policy workflow downloads its Python test runner from PyPI, so
+version pins alone are insufficient: a compromised index response or replaced
+artifact could otherwise change executable CI code without a repository diff.
+The workflow therefore uses pip hash-checking mode (`--require-hashes`) together
+with `--only-binary=:all:` and the exact SHA-256 digest of every wheel selected
+on the fixed `ubuntu-24.04` x86-64 / CPython 3.14 runner:
+
+- coverage 7.15.2: `b9a6367e4aff723e8ee8190836836124284e8fcd4265e307c844010cfa074f3f`;
+- iniconfig 2.1.0: `9deba5723312380e77435581c6bf4935c94cbfab9b1ed33ef8d238ea168eb760`;
+- packaging 26.2: `5fc45236b9446107ff2415ce77c807cee2862cb6fac22b8a73826d0693b0980e`;
+- pluggy 1.6.0: `e920276dd6813095e9377c0bc5566d94c932c33b27a3e3945d8389c374dd4746`;
+- Pygments 2.20.0: `81a9e26dd42fd28a23a2d169d86d7ac03b46e2f8b59ed4698fb4785f946d0176`;
+- pytest 9.1.1: `37a86b45efb9a47a61a36449063e8e18d0cab3161329fc099eb21783169c4f0c`.
+
+`tests/test_strix_workflow_dependency_hashes.py` was committed before the
+workflow implementation and fails against the preceding exact head because
+hash-checking mode and its trigger path are absent. It is now part of the
+workflow's own path filter and verifies every requirement/digest pair. Any
+package or runner-platform change must update the package version, PyPI wheel
+digest, regression contract, and this record together. A digest mismatch must
+fail closed; do not disable hash checking to restore availability.
+
+## Rollback and incident response
+
+Roll back the allowlist and regression together only if a downstream call is
+proven to evaluate normalized paths as shell source. Until that defect is fixed,
+fail Strix closed and retain the offending path, workflow run, and commit SHA as
+incident evidence. Do not bypass the required security check.
+
+If an exact dependency wheel becomes unavailable, first verify the release and
+artifact digest against PyPI's file record and provenance. A rollback may select
+the last known-good fully versioned wheel only when its exact hash is recorded in
+the workflow, regression contract, and this document. Never replace
+`--require-hashes` with an unhashed install.
+
+## References
+
+Batchelder, N., & contributors. (2026). *coverage.py 7.15.2* [Computer
+software]. Python Package Index. https://pypi.org/project/coverage/7.15.2/
+
+Git Project. (2026). *Git index format*. https://git-scm.com/docs/index-format
+
+Git Project. (2026). *git-ls-tree documentation*. https://git-scm.com/docs/git-ls-tree
+
+Python Packaging Authority. (2026). *Secure installs*. pip documentation.
+https://pip.pypa.io/en/stable/topics/secure-installs/
+
+Python Software Foundation. (2026). *pathlib—Object-oriented filesystem paths
+(Python 3.14.6 documentation)*. https://docs.python.org/3.14/library/pathlib.html
+
+pytest development team. (2025). *iniconfig 2.1.0* [Computer software]. Python
+Package Index. https://pypi.org/project/iniconfig/2.1.0/
+
+pytest development team. (2025). *pluggy 1.6.0* [Computer software]. Python
+Package Index. https://pypi.org/project/pluggy/1.6.0/
+
+pytest development team. (2026). *pytest 9.1.1* [Computer software]. Python
+Package Index. https://pypi.org/project/pytest/9.1.1/
+
+Python Packaging Authority. (2026). *packaging 26.2* [Computer software].
+Python Package Index. https://pypi.org/project/packaging/26.2/
+
+Pygments contributors. (2026). *Pygments 2.20.0* [Computer software]. Python
+Package Index. https://pypi.org/project/Pygments/2.20.0/

scripts/ci/strix_quick_gate.sh

@@ -406,16 +406,21 @@ if "\x00" in relative_path_str:
     raise SystemExit(1)
 if "\\" in relative_path_str:
     raise SystemExit(1)
+if any(component == ".." for component in relative_path_str.split("/")):
+    raise SystemExit(1)
 normalized = posixpath.normpath(relative_path_str)
 if normalized in (".", "") or normalized.startswith("../") or normalized == "..":
     raise SystemExit(1)
 # '@' is required for Apple/Tauri retina asset names (128x128@2x.png) and '+'
-# for SvelteKit's mandatory route files (+page.svelte, +layout.ts). Preserve
-# the existing ASCII allowlist and additionally accept only Unicode letters,
-# combining marks, and numbers. This supports internationalized repository
-# paths without admitting controls, separators, bidi formatting, shell
-# metacharacters, or Unicode punctuation that could resemble a path boundary.
-allowed_ascii = frozenset("_.@+/ []-")
+# for SvelteKit's mandatory route files (+page.svelte, +layout.ts). Commas and
+# parentheses are ordinary Git filename characters used by historical Packrat
+# fixtures. They remain data because downstream filesystem and Git calls pass
+# the normalized path as a quoted argument rather than executable shell source.
+# Preserve the bounded ASCII allowlist and additionally accept only Unicode
+# letters, combining marks, and numbers. This supports internationalized
+# repository paths without admitting controls, separators, bidi formatting,
+# shell metacharacters, or Unicode punctuation resembling a path boundary.
+allowed_ascii = frozenset("_.@+/ [],()-")
 if not all(
     (character.isascii() and (character.isalnum() or character in allowed_ascii))
     or (

tests/test_strix_changed_path_policy.py

@@ -0,0 +1,94 @@
+"""Regression tests for the production Strix changed-path normalizer."""
+
+from __future__ import annotations
+
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+
+REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
+GATE_SCRIPT = REPOSITORY_ROOT / "scripts" / "ci" / "strix_quick_gate.sh"
+START_MARKER = 'python3 - "$REPO_ROOT" "$changed_file" <<\'PY\'\n'
+END_MARKER = "\nPY\n}\n\nnormalize_changed_files_cache()"
+LEGAL_PACKRAT_PATH = (
+    "packrat/lib/x86_64-pc-linux-gnu/3.4.1/packrat/tests/testthat/"
+    "Ugly, but legal, path for a project (long)/bread/DESCRIPTION"
+)
+
+
+def _normalizer_source() -> str:
+    """Return the exact embedded Python program used in production."""
+
+    gate_source = GATE_SCRIPT.read_text(encoding="utf-8")
+    prefix, separator, remainder = gate_source.partition(START_MARKER)
+    if not separator or not prefix:
+        raise AssertionError("Strix changed-path normalizer start marker is missing")
+    source, separator, _suffix = remainder.partition(END_MARKER)
+    if not separator:
+        raise AssertionError("Strix changed-path normalizer end marker is missing")
+    return source
+
+
+def _normalize(candidate: str) -> subprocess.CompletedProcess[str]:
+    """Execute the production normalizer with an isolated repository root."""
+
+    with tempfile.TemporaryDirectory() as temporary_directory:
+        return subprocess.run(
+            [sys.executable, "-c", _normalizer_source(), temporary_directory, candidate],
+            check=False,
+            capture_output=True,
+            text=True,
+        )
+
+
+class StrixChangedPathPolicyTests(unittest.TestCase):
+    """Verify legal Git paths and fail-closed path boundaries."""
+
+    def test_accepts_historical_packrat_fixture_path(self) -> None:
+        """A tracked Packrat fixture with commas and parentheses is valid input."""
+
+        result = _normalize(LEGAL_PACKRAT_PATH)
+        self.assertEqual(result.returncode, 0, result.stderr)
+        self.assertEqual(result.stdout.strip(), LEGAL_PACKRAT_PATH)
+
+    def test_preserves_existing_supported_punctuation(self) -> None:
+        """Existing bracket, at-sign, plus-sign, space, and hyphen support remains."""
+
+        candidate = "ui/[slug]/128x128@2x +page-safe/file-name.ts"
+        result = _normalize(candidate)
+        self.assertEqual(result.returncode, 0, result.stderr)
+        self.assertEqual(result.stdout.strip(), candidate)
+
+    def test_rejects_traversal_absolute_controls_and_shell_punctuation(self) -> None:
+        """The repair does not admit traversal, controls, or shell syntax."""
+
+        rejected = (
+            "",
+            ".",
+            "..",
+            "../secret.txt",
+            "safe/../target.txt",
+            "/tmp/secret.txt",
+            "safe\\escape.txt",
+            "safe\nname.txt",
+            "safe\rname.txt",
+            " leading.txt",
+            "trailing.txt ",
+            "safe;command.txt",
+            "safe$(command).txt",
+            "safe`command`.txt",
+            "safe|command.txt",
+            "safe&command.txt",
+        )
+        for candidate in rejected:
+            with self.subTest(candidate=repr(candidate)):
+                result = _normalize(candidate)
+                self.assertNotEqual(result.returncode, 0)
+                self.assertEqual(result.stdout, "")
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_strix_workflow_dependency_hashes.py

@@ -0,0 +1,32 @@
+"""Supply-chain contracts for the Strix changed-path policy workflow."""
+
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+WORKFLOW = ROOT / ".github" / "workflows" / "strix-changed-path-quality-ci.yml"
+EXPECTED_WHEEL_HASHES = {
+    "coverage==7.15.2": "b9a6367e4aff723e8ee8190836836124284e8fcd4265e307c844010cfa074f3f",
+    "iniconfig==2.1.0": "9deba5723312380e77435581c6bf4935c94cbfab9b1ed33ef8d238ea168eb760",
+    "packaging==26.2": "5fc45236b9446107ff2415ce77c807cee2862cb6fac22b8a73826d0693b0980e",
+    "pluggy==1.6.0": "e920276dd6813095e9377c0bc5566d94c932c33b27a3e3945d8389c374dd4746",
+    "pygments==2.20.0": "81a9e26dd42fd28a23a2d169d86d7ac03b46e2f8b59ed4698fb4785f946d0176",
+    "pytest==9.1.1": "37a86b45efb9a47a61a36449063e8e18d0cab3161329fc099eb21783169c4f0c",
+}
+
+
+def test_strix_workflow_installs_only_hash_verified_wheels() -> None:
+    """Every network-installed test dependency is versioned and hash verified."""
+    workflow = WORKFLOW.read_text(encoding="utf-8")
+
+    assert "--only-binary=:all:" in workflow
+    assert "--require-hashes" in workflow
+    for requirement, digest in EXPECTED_WHEEL_HASHES.items():
+        assert f"{requirement} --hash=sha256:{digest}" in workflow
+
+
+def test_strix_workflow_reruns_when_hash_contract_changes() -> None:
+    """Changing this regression contract must trigger the exact-head workflow."""
+    workflow = WORKFLOW.read_text(encoding="utf-8")
+
+    assert '      - "tests/test_strix_workflow_dependency_hashes.py"' in workflow