[pull] main from bazel-contrib:main - #690

)

agents(rules): add manual tag rule and frontmatter to starlark.md

Add YAML frontmatter triggers (`*.bzl,BUILD,BUILD.bazel,*.bazel`) to
`.agents/rules/starlark.md` so Bazel rules load automatically, and
document that internal macro helper targets must use `tags =
["manual"]`) to avoid being built during wildcard expansion.

Add py_extension to features.loadable_symbols.

This allows callers to use feature detection and optionally load it,
if desired.

…#4004)

Update the create-pr skill to specify interactive user-facing artifact
requirements and explicit user decision options when proposing PRs.

Previously, the create-pr skill instructions lacked explicit
requirements for user-facing markdown artifacts with interactive
feedback enabled, as well as defined options for user decision
workflows.

To address this, the SKILL.md documentation is updated to require
user-facing artifacts with interactive feedback enabled and to outline
the four decision choices for user review.