galaxy-tool-refactor-rules

Shared rule-metadata vocabulary for the Galaxy tool refactoring framework — a small, dependency-free "tier 0.5" package consumed by both higher tiers:

It provides:

• galaxy_tool_refactor_rules.meta.RuleMeta — a frozen dataclass describing one GTR rule (code, summary, since, until, cite, order, detect_only, applies_to). A tier-3 formatter Rule, a tier-2 CodemodCommand, and a tier-3.5 CheckRule each carry a meta: ClassVar[RuleMeta], so the tiers share one registry vocabulary.
• galaxy_tool_refactor_rules.violation.Violation — a frozen dataclass for a detect-phase finding (code, sourceline, xpath, message); the pure, lxml-free, read-only counterpart to the mutating tier-2 Change / tier-3 Edit.
• galaxy_tool_refactor_rules.reference.render_rule_reference_table — a pure helper that renders (RuleMeta, tier) pairs as a GitHub-flavored markdown glossary table.

Why a separate package

The descriptor is the only thing the two tiers genuinely share — their behavioral bases differ (fmt yields lxml edits; codemod walks a cursor), so those stay in their own packages. Keeping RuleMeta here, with zero runtime dependencies, lets both fmt and codemod depend on it without depending on each other — preserving the tier independence documented in galaxy-tool-fmt/docs/decisions.md §D10. The extraction was anticipated in that package's §D1 ("a shared rule-engine package will be extracted only when a second consumer materialises"); the codemod tier is that consumer.

Install / test

uv sync   # from the workspace root
uv run --package galaxy-tool-refactor-rules pytest galaxy-tool-refactor-rules/tests/