Align Recipe pyproject.toml

Use this skill to bring a Python recipe's pyproject.toml (and, when it disagrees, its manifest.yaml description) into conformance with the repo standard enforced by .github/workflows/python-validate-recipe.yml.

Scope: pyproject.toml only. Standalone ruff.toml / .ruff.toml files are also forbidden in recipes but are enforced by the CI workflow (Check 7 in python-validate-recipe.yml) — outside this skill's concern.

Not in scope: adk-major-current. The CI validator also emits a warn-only notice when a core/ recipe resolves to an older google-adk major. This skill deliberately does not implement it, and you should not add it. The mechanical fix — widening <2.0.0 to <3.0.0 and re-locking — produces a recipe importing a major it was never ported to, and that break surfaces at runtime rather than in any check. Crossing an ADK major is a code migration; this skill only rewrites metadata. If you are asked to "fix the ADK notice", port the recipe by hand.

What This Skill Checks

Runs scripts/align_pyproject.py against a recipe directory. Eight rules:

Why stale-python-version-refs exists

A bootstrap script that picks an interpreter from an allowlist still containing the old floor will happily build a venv the recipe then refuses to install into:

for py in python3.13 python3.12 python3.11 python3.10 python3; do
# ...
# ERROR: Package requires a different Python: 3.10.x not in '>=3.11'

The scan requires a Python-ish context (python 3.10, Python :: 3.10, >=3.10) rather than matching bare digits, so a model name like gemini-3.5-flash is not a false positive. It skips lockfiles, virtualenvs, caches, and binary files, and ignores requires-python in pyproject.toml itself (owned by python-version-floor, and still pre-rewrite in memory when this check runs). Hits are capped at 40 in details.hits, but details.files always lists every affected file.

Edit safety

• TOML edits go through tomlkit — comments, blank lines, and unrelated tables in pyproject.toml are preserved.
• YAML edits (only when --description-source=pyproject overwrites manifest.description) go through ruamel.yaml — comments in manifest.yaml are preserved.
• Files are only rewritten if at least one auto-fix actually ran. Otherwise on-disk bytes are untouched.
• No files outside the recipe directory are ever modified. The workflow file, root pyproject.toml, and other recipes are safe.

Rules for the Agent

1. Always use the script — never hand-edit pyproject.toml or manifest.yaml to perform these changes. The script exists specifically so edits are style-preserving and reviewable via one report.
2. Ask for the recipe directory if the user has not provided one. Do not guess. Recipe roots live under core/python/<name>/, contrib/python/<name>/, or plugins/<vertical>/<solution>/.
3. Always start with --dry-run unless the user has explicitly said "apply", "fix it", "just do it", or equivalent. Show them what would change before doing it.
4. Only report checks that need attention. The script always returns every check's status, but the user does not need to see the ones that passed. Filter to status != "ok".
   • If nothing needs attention: reply with a single positive line (see the response format below). Don't list what's fine, don't build a table.
   • If something needs attention: render only the non-ok checks.
5. If description-matches-manifest returns needs_input, the descriptions in pyproject.toml and manifest.yaml disagree and the script cannot pick a winner. Present the two values side by side and ask the user to choose one of the three resolution options. Do not re-run the script until they choose.
6. If build-system-present returns report_only, [build-system] is missing or incomplete. Tell the user the recipe cannot be built as a package until this is fixed, and offer them a hatchling or uv_build template snippet. Do not silently pick one.
7. If default-pypi-index returns report_only, the recipe declares a default index that is NOT public PyPI (e.g. a private mirror, TestPyPI). The skill will not overwrite an intentional choice. Show the user the current url from details.current_url and ask whether it's deliberate. If yes, they can # noqa-comment it or update the repo standard; if no, they should change the URL to https://pypi.org/simple/. Do not auto-rewrite.
8. If stale-python-version-refs returns report_only, list the affected files from details.files and call out any executable ones first (.sh, .py, Makefile, CI YAML) — a stale interpreter allowlist in a bootstrap script is a live bug, not a docs nit, and it produces a confusing requires a different Python failure at install time. Prose files (README.md, SKILL.md) are lower priority but still inconsistent. Offer to update them; do not rewrite without asking, since some references are legitimately historical ("dropped 3.10 support in v2").
9. If runnability-test-in-testpaths returns report_only, the recipe's testpaths excludes tests/test_runnability.py, so a bare uv run pytest never runs it — the recipe looks tested while its import-smoke test silently never executes. Show details.testpaths and suggest adding "tests". Do not auto-rewrite.
10. After apply mode succeeds, remind the user to run uv sync in the recipe directory if the pyproject changes touched dependencies (the script emits this in notes when relevant).
11. Do not commit any changes. Show the diff or file contents; let the user commit.

Input

--description-source semantics

If the descriptions already match, this flag is ignored.

Run

Dry-run (read-only report — start here)

uv run --no-project --with tomlkit --with 'ruamel.yaml' --with packaging \
  python .agents/skills/align-recipe-pyproject/scripts/align_pyproject.py \
  --recipe-dir <RECIPE_DIR> --dry-run

Output: JSON on stdout. Every check produces one entry with id, status (ok / would_fix / needs_input / report_only / error), a human-readable message, and structured details. Exit code is always 0 in dry-run.

Apply (rewrite files)

uv run --no-project --with tomlkit --with 'ruamel.yaml' --with packaging \
  python .agents/skills/align-recipe-pyproject/scripts/align_pyproject.py \
  --recipe-dir <RECIPE_DIR>

Fixes everything the script can safely fix. Exits 0 if nothing is left unresolved, 1 otherwise (typically because description-matches-manifest needs --description-source or build-system-present needs a human).

Apply with description resolution

uv run --no-project --with tomlkit --with 'ruamel.yaml' --with packaging \
  python .agents/skills/align-recipe-pyproject/scripts/align_pyproject.py \
  --recipe-dir <RECIPE_DIR> --description-source={pyproject|manifest|delete}

Preview a description resolution (dry-run + --description-source)

--description-source combines with --dry-run: the script reports the would_fix outcome of the chosen resolution without writing any files. Use this to show the user exactly what a given choice will do before you apply it — the two flags are not mutually exclusive.

uv run --no-project --with tomlkit --with 'ruamel.yaml' --with packaging \
  python .agents/skills/align-recipe-pyproject/scripts/align_pyproject.py \
  --recipe-dir <RECIPE_DIR> --dry-run \
  --description-source={pyproject|manifest|delete}

Respond

Filter the report to checks with status != "ok". Never list what's fine — the user is here to see what needs doing.

If everything passed

Reply with a single line, no table, no bullets. Something like:

✓ <RECIPE_DIR>'s pyproject.toml is fully aligned with the repo standard. No changes needed.

Then stop. Do not run any further tools.

If there are things to report

Name the recipe directory once, then render a single Markdown table with these three columns:

• Rule — the check id, in backticks (e.g. `no-local-ruff-config`).
• Status — the raw status value (would_fix, fixed, needs_input, report_only, error). Do not add emoji unless the user has asked for them.
• Details — a compact summary of both what's wrong and what will happen (or what the user must do), merged into one cell so the table stays 3 columns wide. Quote from → to values from details when present.

Include exactly one row per non-ok check. Do not include ok rows.

Status-specific guidance for what to put in the Details cell:

• would_fix (dry-run) — describe the current-state problem, then say what apply would do. Include the from → to or the list of tables to be removed.
• fixed (apply) — one-liner confirming the change (new value or list of removed tables).
• needs_input (only description-matches-manifest) — the Details cell says something like "descriptions differ — needs --description-source={pyproject,manifest,delete}". Do not put the two long descriptions inside the table. See "Follow-up content" below.
• report_only (four rules can hit this: build-system-present, default-pypi-index when a non-PyPI default is declared, stale-python-version-refs, and runnability-test-in-testpaths) — the Details cell names what's missing or non-conforming (e.g. "[build-system] missing; recipe cannot be built as a package" or "default index is TestPyPI, not public PyPI"). Follow-up content goes below the table (see next section).
• error — the Details cell shows the message verbatim; if it's very long, truncate with … and put the full text below.

Follow-up content below the table

Only for statuses that need extra context. Order: table first, then this content, then closing action.

• needs_input follow-up — present pyproject_description and manifest_description from details side by side (a small nested table works well), then ask the user to pick one of pyproject, manifest, or delete. Do not re-run until they answer.

• report_only follow-up — explain the impact (recipe cannot be built as a package) and paste both templates so the user can choose:

  # Hatchling (traditional Python packaging)
  [build-system]
  requires = ["hatchling"]
  build-backend = "hatchling.build"
  
  [tool.hatch.build.targets.wheel]
  packages = ["app"]
  
  # ---- OR ----
  
  # uv_build (Astral's uv-native backend)
  [build-system]
  requires = ["uv_build>=0.8.14,<0.9.0"]
  build-backend = "uv_build"
  
  [tool.uv.build-backend]
  module-root = ""
  module-name = "app"

• error follow-up — if the message was truncated in the table, print it verbatim in full below. Do not attempt to work around it.

Closing action

• Dry-run with at least one would_fix row — offer to apply the fixes yourself. Do NOT paste the raw command as a copy-and-paste snippet for the user. Instead ask something like "Want me to apply these fixes?" (a yes/no question is fine; a question with clear options is nicer UX). If the user agrees, run apply mode yourself and render the result as another table (with fixed rows instead of would_fix). If the user declines, stop.
• Dry-run with only needs_input for description-matches-manifest — after the table, show the two descriptions side by side and ask the user to pick one of pyproject, manifest, or delete. When they choose, run apply yourself with --description-source=<their choice> and render the resulting table. Do not offer generic "apply" — the flag is required.
• Dry-run with only report_only (and no would_fix rows) — after the table, address the specific case:
  • build-system-present: show the two [build-system] template snippets and stop. This is a manual edit; the skill does not auto-fix it.
  • default-pypi-index: quote details.current_url, explain that this is not public PyPI, and ask whether it's intentional. If not, tell the user to change the URL to https://pypi.org/simple/. Do not auto-rewrite.
  • stale-python-version-refs: list details.files, executable files first, and offer to update them.
  • runnability-test-in-testpaths: quote details.testpaths and suggest adding "tests".
• Dry-run with only error rows — do not offer to apply. Errors mean the script bailed before it could compute a fix; the user has to resolve the underlying issue first.
• Dry-run with a mix (e.g. some would_fix + a needs_input) — offer to apply the fixable ones. The apply run will fix those and leave the others as-is; render the resulting table and then address the remaining statuses per the rules above.
• Apply mode with any fixed row — end with the "Next steps" reminder (see below).

Do NOT commit any changes yourself. Ever.

After apply mode

If any check has status: fixed, remind the user:

Next steps:
  cd <RECIPE_DIR> && uv sync    # if dependencies changed
  git diff                       # review the edits before committing

Then stop. Do not commit. Do not run any further tools. End your turn.