feat: distribute selected skills from their owning packages

[LadyBluenotes]

🎯 Changes

Stacked on #258. Adds a saved repository-distribution choice to the maintainer workflow so package-owned skills can also reach consumers through GitHub skill installers and native plugins.

maintainer setup records explicitly selected skills or an opt-out in skill_tree.yaml. maintainer sync generates Claude/Cursor plugin metadata and copyable npx skills add and gh skill add commands pointing to the existing directories. maintainer check catches an unconfigured choice and stale generated files. Adding a skill never expands the selection automatically.

Skills stay alongside their code. Existing plugin fields and other marketplace entries are preserved; conflicting identities, source roots, and missing selected prerequisites are reported before synchronization writes files. The authoring procedure explains this choice during setup and distinguishes pre-install discovery guidance from installed-version implementation guidance.

The selection controls generated metadata and suggested commands; third-party installers retain their own repository discovery behavior. Publication stays with the library's release process. Documentation is in #259, which remains open for the maintainer release.

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm run test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 0a9eec3

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☁️ Nx Cloud last updated this comment at 2026-09-09 05:02:15 UTC

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@tanstack/intent@260

commit: 0a9eec3

[codspeed-hq]

Merging this PR will not alter performance

✅ 9 untouched benchmarks

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_{Comparing feat-skill-distribution (0a9eec3) with feat-focused-authoring-review (366ff0a)}