Rules skill Gazelle

rules_skill_gazelle adds a skill_library(name = "skill") to each named subpackage that contains a SKILL.md. The generated rule loads its macro from the apparent rules_skill repository, so Bzlmod repository mappings are respected.

Add rules_skill as a normal dependency and this generator as a development dependency:

bazel_dep(name = "rules_skill", version = "<VERSION>")
bazel_dep(
    name = "rules_skill_gazelle",
    version = "<VERSION>",
    dev_dependency = True,
)

Add the public language target to the repository’s custom Gazelle binary:

load("@gazelle//:def.bzl", "gazelle_binary")

gazelle_binary(
    name = "gazelle_binary",
    languages = [
        "@rules_skill_gazelle//gazelle",
    ],
)

The generated source bundle is:

load("@rules_skill//skill:defs.bzl", "skill_library")

skill_library(
    name = "skill",
    srcs = glob(
        ["**"],
        exclude = [
            "BUILD.bazel",
            "BUILD",
            "evals/**",
        ],
    ),
)

The generator always excludes BUILD.bazel and BUILD, plus every custom BUILD filename configured in Gazelle. Duplicate configured names are removed.

SKILL.md is sufficient for Gazelle to create a new BUILD file below the repository root. A root-level SKILL.md is ignored because rules_skill requires a named package from which it can derive the skill name. Existing attributes on a manually maintained skill_library(name = "skill") are preserved, and a missing SKILL.md does not delete a manual rule.

The public @rules_skill_gazelle//gazelle:gazelle_skills binary contains only this extension and can update a nested workspace without initializing unrelated language plugins from its parent repository.