chore(plugins): consolidate core into me and prune unused skills

[baleen37]

Summary

• plugins/core/agents/*를 plugins/me/agents/로 이동하고 plugins/core/ 제거
• .claude-plugin/marketplace.json에서 core 항목 제거
• 미사용 스킬 제거: claude-code-rules, eval-harness, grill-me, harness-audit, tmux-workers, variant-compare
• README의 관련 행 정리

Changes

• core 플러그인 통합으로 me 플러그인이 agents까지 포함
• setup 스킬과 WorktreeCreate hook은 그대로 유지

Test plan

• bats tests/ 통과
• pre-commit run --all-files 통과
• marketplace.json JSON 유효성 확인

Summary by CodeRabbit

• Chores
  • Removed a plugin from the marketplace registry.
  • Removed documentation for several deprecated skills.
  • Updated configuration files to reflect the removals.

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 8c0e918f-9a15-4d7f-9d46-97f049e334ec

📥 Commits

Reviewing files that changed from the base of the PR and between c40bcbb and a701fe5.

📒 Files selected for processing (2)

• tests/me/eval-harness.bats
• tests/me/me-specific.bats

📝 Walkthrough

Walkthrough

This PR removes the deprecated core plugin from the marketplace registry and deletes six skill documentation files (claude-code-rules, eval-harness, grill-me, harness-audit, tmux-workers, variant-compare) from the me plugin. The README is updated to reflect the removed skills.

Changes

Plugin Deprecation and Skills Cleanup

Layer / File(s)	Summary
Core Plugin Removal .claude-plugin/marketplace.json, plugins/core/.claude-plugin/plugin.json	The core plugin is removed from the marketplace registry and core plugin metadata file is deleted.
Me Plugin Skills Removal plugins/me/skills/claude-code-rules/SKILL.md, plugins/me/skills/eval-harness/SKILL.md, plugins/me/skills/grill-me/SKILL.md, plugins/me/skills/harness-audit/SKILL.md, plugins/me/skills/tmux-workers/SKILL.md, plugins/me/skills/variant-compare/SKILL.md	Six skill documentation files are deleted from the me plugin, including their frontmatter and instructional content.
Documentation Update README.md	The me plugin skills table is updated to remove entries for eval-harness, tmux-workers, and claude-code-rules.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• baleen37/bstack#620: Adds the tmux-workers SKILL.md file that this PR deletes, representing inverse operations on the same file.
• baleen37/bstack#615: Also removes multiple me plugin skills and performs overlapping cleanup of skill documentation and plugin entries.

Poem

🐰 Once thriving plugins now fade away,
Core and skills bid their last hurrah,
Documentation swept clean, tidily today,
The marketplace breathes lighter—aha!
Deprecated paths let go with grace,
Cleaner code claims its rightful place. 🌙

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main changes: consolidating the core plugin into me and removing unused skills, which aligns with the changeset modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch swift-juniper-dijkstra

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