Vigilante Python Issue Implementation

Focus

• Read the prompt for detected tech stacks, process hints, and Python security guidance before changing code.
• Follow idiomatic Python conventions already established by the repository and keep changes scoped to the issue.
• Prefer the repository's existing environment, dependency, formatting, linting, typing, and test workflows over inventing a new stack.

Python Tooling Workflow

• Environment: use the repository's documented bootstrap or environment workflow first. When no repo-specific workflow exists, prefer isolated environments such as venv rather than ad hoc global installs.
• Formatting and linting: run the repository's established formatter and linter for touched files. When the repository already uses Ruff, prefer ruff format and ruff check; when it uses Black, use black. Do not introduce repo-wide formatting churn unrelated to the issue.
• Typing: run the repository's existing typing checks when present, such as mypy, pyright-style tooling, or equivalent configured commands.
• Testing: run targeted pytest or repo-standard test commands for the changed area first, then broaden scope when needed.
• Dependency and package security: when dependency or packaging changes are involved, run repo-standard audit tooling. Use pip-audit when it is already part of the repo workflow or otherwise clearly available and relevant.
• Dependencies: prefer standard library modules when they cover the need. Keep dependency manifests and lockfiles consistent when adding or updating packages.

Idiomatic Python

• Follow existing project conventions for layout, imports, and naming instead of forcing a new style.
• Prefer small, explicit functions, early returns, and straightforward exception handling.
• Add or update docstrings only where the repository already expects them or where a public API change needs clear documentation.
• Avoid broad cleanup or modernization unrelated to the issue.

Security

• Prefer secrets over random for security-sensitive values.
• Avoid unsafe pickle usage or deserializing untrusted data with Python-native object loaders.
• Be careful with subprocess: prefer explicit argument lists, avoid shell=True unless required and safely constrained, and validate any external input passed to commands.
• Treat file paths and untrusted input defensively to avoid traversal, injection, and unintended file access.
• Do not store secrets, tokens, or credentials in source files.

Workflow

• Follow the base vigilante-issue-implementation workflow for issue comments, validation, push, and PR creation, including stacked base-branch detection (Base branch: directive in the issue body).
• Use vigilante commit for all commit-producing operations. Do not use git commit or GitHub CLI commit flows directly.
• Any commit or amend must preserve the user's existing git author, committer, and signing configuration. Commit on behalf of the user and do not overwrite git config with a coding-agent identity.
• Do not add Co-authored by: trailers or any other agent attribution for Codex, Claude, Gemini, or similar coding-agent identities.

Repository Overrides

• Repository-specific instructions (AGENTS.md, README.md, CI config, tool config files) remain authoritative when they are more specific than the generic Python guidance in this skill.