From 805691a71b5a1128618dbb1043e33e1c40fe70a4 Mon Sep 17 00:00:00 2001
From: Codex <codex@openai.com>
Date: Sat, 17 Oct 2026 16:20:12 +0200
Subject: [PATCH] docs: establish phase 0 evidence workflow

---
 .gitattributes                                |  7 ++
 .gitignore                                    | 16 +++
 README.md                                     | 36 +++++++
 ...0001-public-private-repository-boundary.md | 30 ++++++
 docs/collection/lightburn.md                  | 39 ++++++++
 docs/data-handling.md                         | 33 +++++++
 docs/project-charter.md                       | 29 ++++++
 docs/research/installer-inventory.md          | 23 +++++
 docs/research/machine-profile.yaml            | 40 ++++++++
 schemas/artifact-manifest.schema.json         | 59 +++++++++++
 scripts/__init__.py                           |  1 +
 scripts/build_manifest.py                     | 99 +++++++++++++++++++
 scripts/check_public_repo.py                  | 68 +++++++++++++
 tests/test_build_manifest.py                  | 52 ++++++++++
 tests/test_public_repo_guard.py               | 41 ++++++++
 15 files changed, 573 insertions(+)
 create mode 100644 .gitattributes
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 docs/adr/0001-public-private-repository-boundary.md
 create mode 100644 docs/collection/lightburn.md
 create mode 100644 docs/data-handling.md
 create mode 100644 docs/project-charter.md
 create mode 100644 docs/research/installer-inventory.md
 create mode 100644 docs/research/machine-profile.yaml
 create mode 100644 schemas/artifact-manifest.schema.json
 create mode 100644 scripts/__init__.py
 create mode 100644 scripts/build_manifest.py
 create mode 100644 scripts/check_public_repo.py
 create mode 100644 tests/test_build_manifest.py
 create mode 100644 tests/test_public_repo_guard.py

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..4084732
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,7 @@
+* text=auto
+*.md text eol=lf
+*.py text eol=lf
+*.json text eol=lf
+*.jsonl text eol=lf
+*.yaml text eol=lf
+*.yml text eol=lf
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f74f096
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,16 @@
+__pycache__/
+*.py[cod]
+.pytest_cache/
+.venv/
+.uv-cache/
+
+# Sensitive/raw acquisition data belongs in ThePirateRay-PrivateStash.
+/raw/
+/private/
+*.lbprefs
+*.lbzip
+prefs.ini
+prefs.old
+
+# Local reports are reproducible and must not be committed accidentally.
+/reports/
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..feabc53
--- /dev/null
+++ b/README.md
@@ -0,0 +1,36 @@
+# The Pirate Ray
+
+The Pirate Ray is Makerspace Næstved's clean-room project for learning how to
+interoperate with its laser equipment and, over time, building a safe desktop
+control application.
+
+Phase 0 focuses on the **JPT 100 W E2/M7 MOPA** fiber laser with a JCZ/EZCAD2
+controller. It is deliberately limited to documentation and offline analysis:
+no USB capture, framing, machine commands, or laser output.
+
+## Repository boundary
+
+This public repository contains source code, plans, decisions, tests, tools,
+and sanitized research. Raw machine data, serial numbers, LightBurn exports,
+and third-party material with unclear redistribution rights live in the
+separate private `ThePirateRay-PrivateStash` repository.
+
+Start with:
+
+- [Project charter](docs/project-charter.md)
+- [Data handling policy](docs/data-handling.md)
+- [LightBurn collection checklist](docs/collection/lightburn.md)
+- [Sanitized machine profile](docs/research/machine-profile.yaml)
+- [Repository boundary decision](docs/adr/0001-public-private-repository-boundary.md)
+
+## Validation
+
+The repository uses only Python's standard library for Phase 0 tooling:
+
+```powershell
+python -m unittest discover -s tests -v
+python scripts/check_public_repo.py .
+```
+
+No project license has been selected yet. Until that decision is recorded,
+the contents are not offered under an open-source license.
diff --git a/docs/adr/0001-public-private-repository-boundary.md b/docs/adr/0001-public-private-repository-boundary.md
new file mode 100644
index 0000000..65f5993
--- /dev/null
+++ b/docs/adr/0001-public-private-repository-boundary.md
@@ -0,0 +1,30 @@
+# ADR 0001: Public/private repository boundary
+
+- Status: Accepted
+- Date: 2026-10-17
+
+## Context
+
+The project needs unusually complete evidence while some inputs contain
+identifiers, configuration secrets, or third-party files whose redistribution
+rights are unclear.
+
+## Decision
+
+Use exactly two authoritative repositories. `ThePirateRay` is public and holds
+all normal development work. `ThePirateRay-PrivateStash` holds sensitive raw
+data and redistribution-restricted third-party material. Google Drive is used
+only as a read-only acquisition source.
+
+Public documents cite private evidence by content-derived artifact ID and
+SHA-256 digest. Git LFS is mandatory for binary files in PrivateStash. If the
+Git server cannot store and retrieve LFS objects, raw binary import stops rather
+than falling back to ordinary Git blobs.
+
+## Consequences
+
+- A public clone is useful without access to private evidence.
+- Authorized researchers can reproduce claims from exact private bytes.
+- Cross-repository commits must be ordered: private evidence first, sanitized
+  public analysis second.
+- The two repositories must be validated separately.
diff --git a/docs/collection/lightburn.md b/docs/collection/lightburn.md
new file mode 100644
index 0000000..af19b1c
--- /dev/null
+++ b/docs/collection/lightburn.md
@@ -0,0 +1,39 @@
+# LightBurn collection checklist
+
+Collect directly into a dated directory under
+`ThePirateRay-PrivateStash/raw/lightburn/`. Do not use Google Drive as an
+intermediate workspace.
+
+## Before collection
+
+- Confirm no marking job is active.
+- Do not enable debug logging or generate Support Data.
+- Record which lens is installed and whether LightBurn currently connects.
+
+## Required evidence
+
+| Directory | Evidence |
+| --- | --- |
+| `00-version/` | Screenshot of Help → About with exact version/build |
+| `01-exports/` | Full `.lbzip` bundle and exported `.lbprefs` |
+| `02-prefs/` | ZIP of `%LOCALAPPDATA%\LightBurn`, copied only after LightBurn is fully closed |
+| `03-device-settings/` | Device list and every Device Settings tab for the JPT device |
+| `04-projects/` | Two or three known-working `.lbrn2` files, including vector and MOPA/hatch examples when available |
+| `05-hardware/` | Machine, source, controller, and active-lens labels; never open an energized enclosure |
+| `06-context/` | Mounted lens, connection status, and normal startup/interlock notes |
+
+## Export procedure
+
+1. Use File → Bundles → Export Bundle and include every available component.
+2. Use File → Preferences → Export Prefs.
+3. Capture the UI screenshots and save existing example projects.
+4. Exit LightBurn completely.
+5. Copy `%LOCALAPPDATA%\LightBurn` into an archive without editing its contents.
+6. Run the private manifest tool and review the staged files before committing.
+
+LightBurn documents bundles as containing settings, device profiles, hotkeys,
+presets, and libraries. Since LightBurn 2.0, device export is also represented
+as a bundle: <https://docs.lightburnsoftware.com/latest/Guides/Migration/>.
+
+LightBurn explicitly warns not to publish generated Support Data:
+<https://docs.lightburnsoftware.com/latest/Reference/Hidden/GenerateSupportData/>.
diff --git a/docs/data-handling.md b/docs/data-handling.md
new file mode 100644
index 0000000..e8f15c8
--- /dev/null
+++ b/docs/data-handling.md
@@ -0,0 +1,33 @@
+# Data handling policy
+
+## Authoritative repositories
+
+| Classification | Repository | Examples |
+| --- | --- | --- |
+| `public` | `ThePirateRay` | Code, tests, plans, schemas, sanitized analysis |
+| `private-sensitive` | `ThePirateRay-PrivateStash` | Serial numbers, local usernames, license-related data, private source locators |
+| `private-third-party` | `ThePirateRay-PrivateStash` | Vendor binaries, manuals, raw LightBurn/EZCAD files with unclear redistribution rights |
+
+Google Drive is a read-only acquisition source, not a project workspace. No
+project artifact is created, edited, renamed, or reorganized there.
+
+## Rules
+
+- Preserve raw bytes. Analysis always produces a new file.
+- Record SHA-256, byte size, media type, acquisition time, origin label, and
+  classification for every acquired file.
+- Keep exact Drive IDs, URLs, machine serials, usernames, and local paths only
+  in the private manifest.
+- Refer to private evidence publicly using `artifact_id` and `sha256` only.
+- Never commit LightBurn Support Data to the public repository.
+- Do not execute software acquired from the installer stick during analysis.
+- Run the public repository guard before each public push.
+
+## Redaction flow
+
+1. Acquire the original into the private repository.
+2. Generate and verify the private manifest.
+3. Analyze the original without modifying it.
+4. Create a sanitized derivative in the public repository.
+5. Run automated guards and manually review the staged diff.
+6. Commit and push the private evidence before the public claim that cites it.
diff --git a/docs/project-charter.md b/docs/project-charter.md
new file mode 100644
index 0000000..01993db
--- /dev/null
+++ b/docs/project-charter.md
@@ -0,0 +1,29 @@
+# Project charter
+
+## Goal
+
+Build an evidence-backed knowledge base and, incrementally, a desktop
+application capable of safely controlling Makerspace Næstved's lasers. The
+first hardware target is the JPT 100 W E2/M7 MOPA fiber laser.
+
+## Phase 0 success criteria
+
+1. Public and private repositories are independently cloneable and validated.
+2. Raw evidence is immutable, hashed, and kept in the private repository.
+3. Every public technical claim is traceable to a private artifact ID and
+   SHA-256 digest without exposing private locators.
+4. Collection and analysis can be repeated using committed tools and tests.
+5. No command is sent to laser hardware during Phase 0.
+
+## Clean-room boundary
+
+The project studies observable configuration formats and hardware behavior for
+interoperability. It does not bypass LightBurn licensing, copy proprietary
+source code or UI assets, or redistribute third-party material without a clear
+right to do so.
+
+## Working practice
+
+Plans, decisions, scripts, tests, reports, and collected evidence are committed
+and pushed in small, meaningful units. Commit messages explain intent. Force
+pushes and history rewriting are not part of the workflow.
diff --git a/docs/research/installer-inventory.md b/docs/research/installer-inventory.md
new file mode 100644
index 0000000..43d1486
--- /dev/null
+++ b/docs/research/installer-inventory.md
@@ -0,0 +1,23 @@
+# Original installer-stick inventory
+
+Status: preliminary metadata inventory; content hashes are pending private
+acquisition.
+
+The read-only source contains an EZCAD2 2.14.16 installation configured for a
+JPT 100 W E2/M7 source. Separate 110 mm and 300 mm configurations are present.
+
+Observed evidence classes include:
+
+- per-lens `markcfg7` files;
+- `CoeFile.cfg`, `EZCAD.CFG`, parameter libraries, and USB logs;
+- screenshots of field, laser-control, port, red-pointer, workspace, and rotary
+  settings;
+- EZCAD executables, plugins, DLLs, driver installer material, and a manual;
+- LightBurn `.clb` material libraries for multiple lens sizes.
+
+All originals and exact source locators belong in PrivateStash. This public
+inventory intentionally omits serial numbers, Drive identifiers, executable
+copies, and manual copies.
+
+The detailed comparison report will be added only after the private snapshot is
+hashed and verified.
diff --git a/docs/research/machine-profile.yaml b/docs/research/machine-profile.yaml
new file mode 100644
index 0000000..849d021
--- /dev/null
+++ b/docs/research/machine-profile.yaml
@@ -0,0 +1,40 @@
+schema_version: 1
+profile_id: makerspace-naestved-jpt-e2-mopa-100w
+status: collection-in-progress
+machine:
+  source_family: JPT
+  source_model: E2/M7
+  nominal_power_w: 100
+  technology: mopa-fiber
+controller:
+  family: JCZ
+  stock_software: EZCAD2
+  stock_software_version_observed: 2.14.16
+optics:
+  active_field_mm:
+    width: 110
+    height: 110
+    status: assumed-pending-physical-verification
+  other_configurations_observed_mm:
+    - width: 300
+      height: 300
+lightburn:
+  version: null
+  build: null
+  status: pending-collection
+usb:
+  vid: null
+  pid: null
+  driver: null
+  status: pending-collection
+safety:
+  phase_0_hardware_commands_allowed: false
+  phase_0_laser_output_allowed: false
+evidence:
+  - artifact_id: pending-installer-110-markcfg7
+    sha256: null
+  - artifact_id: pending-installer-300-markcfg7
+    sha256: null
+notes:
+  - No complete serial numbers or private source locators are stored here.
+  - Incorrect galvo or source configuration can damage hardware; values are not inferred by trial and error.
diff --git a/schemas/artifact-manifest.schema.json b/schemas/artifact-manifest.schema.json
new file mode 100644
index 0000000..f58b452
--- /dev/null
+++ b/schemas/artifact-manifest.schema.json
@@ -0,0 +1,59 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://git.p20.dev/christian/ThePirateRay/schemas/artifact-manifest.schema.json",
+  "title": "The Pirate Ray artifact manifest entry",
+  "type": "object",
+  "additionalProperties": false,
+  "required": [
+    "artifact_id",
+    "sha256",
+    "size_bytes",
+    "observed_at_utc",
+    "media_type",
+    "origin",
+    "classification",
+    "analysis_refs"
+  ],
+  "properties": {
+    "artifact_id": {
+      "type": "string",
+      "pattern": "^sha256-[0-9a-f]{20}$"
+    },
+    "sha256": {
+      "type": "string",
+      "pattern": "^[0-9a-f]{64}$"
+    },
+    "size_bytes": {
+      "type": "integer",
+      "minimum": 0
+    },
+    "observed_at_utc": {
+      "type": "string",
+      "format": "date-time"
+    },
+    "media_type": {
+      "type": "string",
+      "minLength": 1
+    },
+    "origin": {
+      "type": "string",
+      "minLength": 1
+    },
+    "classification": {
+      "enum": ["public", "private-sensitive", "private-third-party"]
+    },
+    "analysis_refs": {
+      "type": "array",
+      "items": {"type": "string"},
+      "uniqueItems": true
+    },
+    "relative_path": {
+      "type": "string",
+      "minLength": 1
+    },
+    "source_locator": {
+      "type": "string",
+      "minLength": 1
+    }
+  }
+}
diff --git a/scripts/__init__.py b/scripts/__init__.py
new file mode 100644
index 0000000..5419097
--- /dev/null
+++ b/scripts/__init__.py
@@ -0,0 +1 @@
+"""Phase 0 acquisition and validation tools."""
diff --git a/scripts/build_manifest.py b/scripts/build_manifest.py
new file mode 100644
index 0000000..a470861
--- /dev/null
+++ b/scripts/build_manifest.py
@@ -0,0 +1,99 @@
+#!/usr/bin/env python3
+"""Build a deterministic JSON Lines manifest for an immutable artifact tree."""
+
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import mimetypes
+from datetime import datetime, timezone
+from pathlib import Path
+
+CLASSIFICATIONS = ("public", "private-sensitive", "private-third-party")
+
+
+def sha256_file(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as stream:
+        for chunk in iter(lambda: stream.read(1024 * 1024), b""):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def manifest_entry(
+    path: Path,
+    root: Path,
+    classification: str,
+    origin: str,
+    observed_at: str,
+    include_private_locators: bool,
+) -> dict[str, object]:
+    digest = sha256_file(path)
+    entry: dict[str, object] = {
+        "artifact_id": f"sha256-{digest[:20]}",
+        "sha256": digest,
+        "size_bytes": path.stat().st_size,
+        "observed_at_utc": observed_at,
+        "media_type": mimetypes.guess_type(path.name)[0] or "application/octet-stream",
+        "origin": origin,
+        "classification": classification,
+        "analysis_refs": [],
+    }
+    if include_private_locators:
+        entry["relative_path"] = path.relative_to(root).as_posix()
+    return entry
+
+
+def build_manifest(
+    root: Path,
+    classification: str,
+    origin: str,
+    observed_at: str,
+    include_private_locators: bool = True,
+) -> list[dict[str, object]]:
+    if classification not in CLASSIFICATIONS:
+        raise ValueError(f"unsupported classification: {classification}")
+    if not root.is_dir():
+        raise ValueError(f"artifact root is not a directory: {root}")
+    files = sorted((path for path in root.rglob("*") if path.is_file()), key=lambda p: p.relative_to(root).as_posix())
+    return [
+        manifest_entry(path, root, classification, origin, observed_at, include_private_locators)
+        for path in files
+    ]
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("root", type=Path)
+    parser.add_argument("output", type=Path)
+    parser.add_argument("--classification", choices=CLASSIFICATIONS, required=True)
+    parser.add_argument("--origin", required=True)
+    parser.add_argument(
+        "--observed-at",
+        default=datetime.now(timezone.utc).isoformat().replace("+00:00", "Z"),
+        help="ISO-8601 acquisition timestamp; pass an explicit value for reproducible output",
+    )
+    parser.add_argument("--public", action="store_true", help="omit private relative paths")
+    return parser.parse_args()
+
+
+def main() -> int:
+    args = parse_args()
+    entries = build_manifest(
+        args.root.resolve(),
+        args.classification,
+        args.origin,
+        args.observed_at,
+        include_private_locators=not args.public,
+    )
+    args.output.parent.mkdir(parents=True, exist_ok=True)
+    with args.output.open("w", encoding="utf-8", newline="\n") as stream:
+        for entry in entries:
+            stream.write(json.dumps(entry, ensure_ascii=False, sort_keys=True) + "\n")
+    print(f"wrote {len(entries)} entries to {args.output}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/scripts/check_public_repo.py b/scripts/check_public_repo.py
new file mode 100644
index 0000000..734e91d
--- /dev/null
+++ b/scripts/check_public_repo.py
@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+"""Fail when public tracked content resembles private or vendor raw data."""
+
+from __future__ import annotations
+
+import argparse
+import re
+import subprocess
+from pathlib import Path
+
+DISALLOWED_SUFFIXES = {
+    ".7z", ".clb", ".dll", ".ezd", ".lbprefs", ".lbzip", ".plg", ".rar", ".zip"
+}
+SENSITIVE_TEXT = {
+    "Google Drive URL": re.compile(
+        r"https://drive" r"\.google\.com/(?:drive/folders|file/d)/[A-Za-z0-9_-]+"
+    ),
+    "Windows user path": re.compile(r"C:\\Users\\[^\\\s]+", re.IGNORECASE),
+    "License-key indicator": re.compile(
+        r"light" r"burn.{0,30}license.{0,15}key", re.IGNORECASE
+    ),
+}
+TEXT_SUFFIXES = {"", ".json", ".jsonl", ".md", ".py", ".toml", ".txt", ".yaml", ".yml"}
+
+
+def tracked_files(root: Path) -> list[Path]:
+    result = subprocess.run(
+        ["git", "ls-files", "-z"], cwd=root, check=True, capture_output=True
+    )
+    return [root / item.decode("utf-8") for item in result.stdout.split(b"\0") if item]
+
+
+def check(root: Path) -> list[str]:
+    failures: list[str] = []
+    for path in tracked_files(root):
+        relative = path.relative_to(root).as_posix()
+        suffix = path.suffix.lower()
+        if suffix in DISALLOWED_SUFFIXES:
+            failures.append(f"disallowed public artifact: {relative}")
+            continue
+        if suffix not in TEXT_SUFFIXES:
+            continue
+        try:
+            content = path.read_text(encoding="utf-8")
+        except UnicodeDecodeError:
+            failures.append(f"unexpected binary content in public text file: {relative}")
+            continue
+        for label, pattern in SENSITIVE_TEXT.items():
+            if pattern.search(content):
+                failures.append(f"{label} found in {relative}")
+    return failures
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("root", type=Path, nargs="?", default=Path.cwd())
+    args = parser.parse_args()
+    failures = check(args.root.resolve())
+    if failures:
+        for failure in failures:
+            print(f"ERROR: {failure}")
+        return 1
+    print("public repository guard passed")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/tests/test_build_manifest.py b/tests/test_build_manifest.py
new file mode 100644
index 0000000..b7fd8bb
--- /dev/null
+++ b/tests/test_build_manifest.py
@@ -0,0 +1,52 @@
+import hashlib
+import tempfile
+import unittest
+from pathlib import Path
+
+from scripts.build_manifest import build_manifest
+
+
+class BuildManifestTests(unittest.TestCase):
+    def test_manifest_is_sorted_hashed_and_private_by_default(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            (root / "nested").mkdir()
+            (root / "z.txt").write_text("z", encoding="utf-8")
+            (root / "nested" / "a.bin").write_bytes(b"a")
+
+            entries = build_manifest(
+                root,
+                "private-third-party",
+                "test-source",
+                "2026-10-17T00:00:00Z",
+            )
+
+            self.assertEqual([entry["relative_path"] for entry in entries], ["nested/a.bin", "z.txt"])
+            expected = hashlib.sha256(b"a").hexdigest()
+            self.assertEqual(entries[0]["sha256"], expected)
+            self.assertEqual(entries[0]["artifact_id"], f"sha256-{expected[:20]}")
+
+    def test_public_manifest_omits_paths(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            (root / "item.txt").write_text("safe", encoding="utf-8")
+            entries = build_manifest(
+                root,
+                "public",
+                "test-source",
+                "2026-10-17T00:00:00Z",
+                include_private_locators=False,
+            )
+            self.assertNotIn("relative_path", entries[0])
+            self.assertNotIn("source_locator", entries[0])
+
+    def test_invalid_classification_is_rejected(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            with self.assertRaises(ValueError):
+                build_manifest(
+                    Path(temporary), "secret", "test-source", "2026-10-17T00:00:00Z"
+                )
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_public_repo_guard.py b/tests/test_public_repo_guard.py
new file mode 100644
index 0000000..37dc913
--- /dev/null
+++ b/tests/test_public_repo_guard.py
@@ -0,0 +1,41 @@
+import subprocess
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+from scripts.check_public_repo import check
+
+
+class PublicRepoGuardTests(unittest.TestCase):
+    def test_disallowed_binary_suffix_is_reported(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            candidate = root / "vendor.dll"
+            candidate.write_bytes(b"MZ")
+            with patch("scripts.check_public_repo.tracked_files", return_value=[candidate]):
+                self.assertIn("disallowed public artifact: vendor.dll", check(root))
+
+    def test_private_drive_url_is_reported(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            candidate = root / "notes.md"
+            candidate.write_text(
+                "https://drive" + ".google.com/file/d/private_identifier", encoding="utf-8"
+            )
+            with patch("scripts.check_public_repo.tracked_files", return_value=[candidate]):
+                failures = check(root)
+            self.assertEqual(len(failures), 1)
+            self.assertIn("Google Drive URL", failures[0])
+
+    def test_safe_text_passes(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            candidate = root / "notes.md"
+            candidate.write_text("artifact sha256-01234567890123456789", encoding="utf-8")
+            with patch("scripts.check_public_repo.tracked_files", return_value=[candidate]):
+                self.assertEqual(check(root), [])
+
+
+if __name__ == "__main__":
+    unittest.main()