TodoScope

TodoScope finds maintenance comments (TODO, FIXME, ...) in your code and prints a clean report. Optionally, it asks an AI to interpret each comment and estimate its priority — without ever sending your source code anywhere.

todoscope src/

What it does

• Scans Python, JavaScript, TypeScript, JSX/TSX, Rust, Java, Go, C, C++, and C# files for comments that start with your markers (TODO by default). The default enabled set is .py .js .jsx .ts .tsx .rs; enable more extensions (.java .go .c .h .cpp .cc .cxx .hpp .cs) through extensions in .todoscope.json.
• Only real comments count: TODO inside strings, template literals, JSX text, or raw strings is ignored.
• Respects every .gitignore in the tree (root and nested, with git's override semantics) and an optional exclusion list.
• Works fully offline — the AI part is optional.
• Can show how long each finding's current line has been committed using Git history.
• When AI is on, it sends only each comment's ID, marker, and text. No file names, no paths, no line numbers, no code.

Install

Requires Python 3.12+.

pipx install todoscope        # recommended
# or
uv tool install todoscope     # if you use uv
# or
python3 -m pip install todoscope

Use

todoscope src/                # scan a folder recursively (local only)
todoscope src/main.py         # scan one file
todoscope .                   # scan the whole project
todoscope src/ --ai           # add AI interpretations and priorities
todoscope src/ --ai --no-cache  # bypass the local AI result cache
todoscope src/ --check-secrets  # list comments that look like credentials
todoscope src/ --blame        # add who-authored-each-finding via git blame
todoscope src/ --age          # add time since each finding was committed
todoscope src/ --age --blame  # show both age and attribution
todoscope src/ --min-age 90   # keep only findings at least 90 days old
todoscope src/ --max-age 0    # keep only uncommitted findings
todoscope src/ --changed main # scan only files differing from the main branch
todoscope src/ --quiet        # one numbered finding per line, nothing else
todoscope src/ --verbose      # extra details on stderr
todoscope src/ --format json  # machine-readable JSON report on stdout
todoscope src/ --format sarif # SARIF 2.1.0 report for code-scanning tools
todoscope src/ --format github-actions  # inline PR annotations in GitHub Actions

That's it. Findings are sorted by folder depth, then path, then line, and every text mode uses the same canonical line:

1. src/auth/session.py:84: TODO: Handle expired refresh tokens

Scanning is local by default — --ai is opt-in and never runs when --quiet is given (the combination prints a note and behaves like plain --quiet). --blame requires a Git repository and adds one attribution line per finding. --age also requires Git and shows the number of days since the finding's current marker line was committed. Uncommitted lines are identified as such, while unavailable history is reported without failing the scan. Both options are rejected with --quiet; when combined, they share a single git blame --porcelain call per file. Git history data never reaches the AI.

--min-age DAYS and --max-age DAYS filter the report — and any AI analysis — to findings whose committed age falls in the range. Uncommitted lines count as age 0, so --max-age 0 shows only uncommitted work; lines with unavailable history are excluded while a filter is active. Both require Git, are rejected with --quiet, and JSON reports include an age_filter object with the bounds and the number of removed findings.

--format json prints a deterministic JSON document to stdout (scan metadata, findings, skipped counts, optional blame and age data, and the AI section with a machine-readable status/reason). Age entries include a status, an exact day count, and the commit date; uncommitted or unavailable entries use null for values that do not apply. Without --ai, the AI section is null. --format sarif prints a deterministic SARIF 2.1.0 document with one rule per configured marker; AI priorities map to SARIF levels (High → error, Medium → warning, Low/Unclear → note), and blame and age data are attached as result properties when requested. Verbose details and errors always go to stderr. Neither format ever contains API keys or environment values.

--changed REF restricts the scan to tracked files whose content differs from the given git ref (uncommitted changes are included; untracked files are not). Ignore and extension rules still apply, and the option composes with --blame, --age, and the age filters. JSON reports include a changed_ref field. Requires a valid git ref and a Git repository; unknown refs fail with exit code 2.

Configuration

Everything optional lives in a .todoscope.json in your project root:

{
  "markers": ["TODO", "FIXME"],
  "extensions": [".py", ".js", ".jsx", ".ts", ".tsx", ".rs"],
  "exclude": ["tests/fixtures/", "generated/"],
  "model": "your-ai-model-id",
  "max_ai_characters": 20000
}

Invalid configuration stops with a clear error (exit code 3).

AI analysis

AI is opt-in: pass --ai to request it. To enable it you need both:

1. An API key — from your shell (TODOSCOPE_API_KEY) or a .env file in the project root:

   TODOSCOPE_API_KEY=...
   TODOSCOPE_SECONDARY_API_KEY=...
   

   Shell values win over .env. If a key comes from .env, that file must be ignored by your .gitignore, otherwise AI is refused for safety.

2. A model in .todoscope.json.

When enabled, TodoScope makes one request and then prints one complete report: per finding you get a short interpretation and an estimated priority (High / Medium / Low / Unclear), plus an overall summary. If the request fails and a secondary key is configured, an interactive terminal offers one retry with it — the secondary key is never used silently.

Results are cached locally (XDG cache directory, ~/.cache/todoscope on Linux): repeat runs with identical comment text cost no API budget. The cache stores only comment hashes plus interpretations and priorities — never paths, line numbers, or source — and is best-effort: a broken or unwritable cache never fails a scan. Entries older than 180 days are pruned and the cache is capped at 20,000 entries. Pass --no-cache to bypass it.

Priorities are estimated from comment text only. No source code was provided to the AI.

Before any request, comment text is screened for likely credentials (API keys, tokens, private-key headers, credential assignments). If any finding looks like a secret, the AI request is refused and the suspicious findings are listed locally — the local report is unaffected. Detection is conservative: it flags unambiguous secret shapes, never prose.

--check-secrets runs this screening on any scan, with or without AI: it appends a Possible credentials in comments section listing each flagged finding with the matched rule names, adds a secrets array to JSON reports (null without the flag), and emits credential-in-comment error results in SARIF. It is rejected together with --quiet.

Using DeepSeek (or another OpenAI-compatible provider)

The OpenAI SDK reads OPENAI_BASE_URL from your environment. For DeepSeek:

export OPENAI_BASE_URL=https://api.deepseek.com
todoscope .

or as a permanent alias in ~/.zshrc:

alias todoscope="OPENAI_BASE_URL=https://api.deepseek.com /home/$USER/.local/bin/todoscope"

Privacy

The only data from your repository that reaches the AI is each finding's ID, marker, and extracted comment text. Everything else stays local. Before any request, comment text is screened for likely credentials and the request is refused if any are found. Comments are treated as untrusted data — instructions written inside a comment can never change TodoScope's behaviour. Never put credentials or secrets in code comments, because comment text may be sent to the AI.

Exit codes

• 0 — scan finished (including local-only results after any AI problem)
• 1 — unexpected failure
• 2 — bad path/usage, or an ignored target refused in non-interactive mode
• 3 — configuration error
• 4 — the opt-in --fail/--fail-count gate was tripped (only when one of those flags is given; finding TODOs is never an error by default)

Use in CI

TodoScope is CI-friendly: finding TODOs is not an error, so scans never fail a pipeline just because comments exist. Common patterns:

• Log findings: todoscope . --quiet (one line per finding).
• Machine-readable reports: todoscope . --format json and upload or parse the JSON in later steps.
• Code-scanning alerts: todoscope . --format sarif > todoscope.sarif and upload the file with github/codeql-action/upload-sarif (or another SARIF consumer) to surface findings as alerts in the Security tab.
• Inline PR annotations: todoscope . --format github-actions emits ::warning/::error/::notice workflow commands, so every finding appears directly in the pull request — no extra tooling (see examples/ci/scan-annotations.yml).
• Enforce a threshold: todoscope . --quiet --fail-count 10 exits with code 4 when more than 10 findings remain (or --fail for any findings), so a pipeline can fail on policy while the default stays non-failing (see examples/ci/scan-enforce.yml). The gate counts the final filtered report, so it composes with --min-age, --max-age, and --changed.
• AI in CI: set TODOSCOPE_API_KEY as a repository secret and a model in .todoscope.json; non-interactive runs skip the secondary key safely.

Ready-made examples live in examples/ci/:

• scan-pr.yml — scan on pull requests, print findings, upload the JSON report as an artifact.
• scan-quiet.yml — minimal log-only variant.

Development

uv sync                       # set up the environment
uv run pytest                 # tests
uv run ruff check .           # lint
uv run ruff format --check .  # format check
uv build                      # wheel + sdist

Continuous integration runs these same checks on every push and pull request (Python 3.12 and 3.13).

Releasing

1. Bump version in pyproject.toml (minor for features, patch for fixes).
2. Add a CHANGELOG.md entry for the new version.
3. Commit, then tag and push the tag:

git tag vX.Y.Z          # e.g. git tag v0.8.2
git push
git push --tags

The publish workflow verifies everything, uploads to PyPI using the PYPI_TOKEN repository secret, and creates a GitHub release automatically.

To re-publish an older tag (for example, backfilling a version that never made it to PyPI), run the workflow manually: Actions → Publish → Run workflow, and set the ref input to the tag name (e.g. v0.5.0).

Changelog

See CHANGELOG.md.