chore: scaffold .agents/ mirror tooling for cross-agent (Codex) support

[sanchitmonga22]

Summary

• AGENTS.md was reviewed against the 2026 progressive-disclosure guidance and found already accurate and under the ~200-line budget — no content change.
• Adds scripts/sync-skills.sh (mirrors .claude/skills/ into .agents/skills/ for non-Claude tooling, e.g. Codex, once skills exist here) and the matching .gitignore rules, matching the pattern already in production in runanywhere-sdks and neurun.

Test plan

• bash scripts/sync-skills.sh — no-ops cleanly (no .claude/skills/ yet)
• git status clean otherwise

Summary by CodeRabbit

• New Features

  • Added a utility to synchronize skill configurations between supported tooling directories.
  • Added a check mode to identify outdated synchronized content.
  • The utility safely handles repositories without a source skills directory.

• Chores

  • Updated ignore rules to exclude local assistant and cross-tool configuration directories.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ec3b9917-7407-439d-af7e-eabca0372a3f

📥 Commits

Reviewing files that changed from the base of the PR and between 44a4ded and 6231b49.

📒 Files selected for processing (2)

• .gitignore
• scripts/sync-skills.sh

Included review availability: Your plan includes up to 1 review per rolling hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

Added ignore rules for Claude and agent tooling directories. Added a Bash script that locates the repository, checks skill mirror status, and synchronizes .agents/skills from .claude/skills.

Changes

Skill mirror synchronization

Layer / File(s)	Summary
Skill mirror synchronization script scripts/sync-skills.sh	The script finds the repository root, handles a missing source directory, supports --check, reports differences, and regenerates the mirror.
Tooling directory ignore rules .gitignore	Added ignore rules for .claude/* and .agents/*, with explanatory comments.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to 6231b

This PR adds opt-in skill-mirroring tooling and ignore rules without a demonstrated production-impacting issue; no actionable merge-blocking risk remains beyond normal checks.

Suggested reviewers: shubhammalhotra28

🚥 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 clearly summarizes the added .agents mirror tooling and its cross-agent support purpose.
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.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/agents-claude-refresh

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