Polylith Check

What it does

When your agent uses it

• The user wants to lint
• CI-gate a Polylith workspace

Example prompts

• “/polylith-check”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

1. 1Missing Brick Error: If the error says a brick imports another brick that isn't in [tool.polylith.bricks] → run poly sync (load…
2. 2Missing Dependency Error: If the error says a brick imports a third-party library not listed in the project's dependencies → load…
3. 3Version Drift Error: Under --strict, if versions of the same library diverge between projects → inspect pyproject.toml or load…

What it can do on your machine

Read from SKILL.md and the folder at commit a7a80f2. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • uv
  • poetry
  • pytest

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use uv, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Polylith Check loads about 972 tokens when it runs. Until then it costs about 90 tokens; SKILL.md has 312 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~90

When it runs · the whole SKILL.md, loaded when a task matches

~972

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from DavidVujic/python-polylith at commit a7a80f2, republished under its MIT licence (© DavidVujic). 312 words, ~972 tokens.

name

polylith-check

description

Validate a Polylith workspace with `poly check` — the canonical CI gate. Verifies brick imports against project `pyproject.toml`s, third-party library declarations vs. the lock file, and (under `--strict`) cross-project version consistency. Exits 1 on failure. Use when the user wants to lint, validate, verify, or CI-gate a Polylith workspace.

uv run poly check

uv run poly sync --quiet                          # Make sure brick lists are current (--quiet avoids the interactive prompt)
uv run poly check                                 # Validate; build fails if non-zero

# (Optional) scope test runs to bricks whose implementation changed.
# `poly diff --bricks --short` emits a comma-separated list, which becomes a
# pytest `-k` expression (`log,message` → `pytest -k "log or message"`).
changes="$(uv run poly diff --bricks --short)"
[ -n "$changes" ] && uv run pytest -k "${changes//,/ or }"

# Standard CI gate
uv run poly check

# One project only
uv run poly check --directory projects/user_api

© DavidVujic, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/polylith/polylith-check of DavidVujic/python-polylith.

Open the folder on GitHubat commit a7a80f2