docs: add conventional commit guidance to CLAUDE.md

[jdx]

Summary

• Add conventional commit format guidance
• Include project-specific scopes (shells, spec, parse, complete)
• Add description style guidelines and examples

🤖 Generated with Claude Code

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Note

Adds clear conventional commit standards to CLAUDE.md to standardize commit messages and PR titles.

• Introduces commit format (<type>(<scope>): <description>), supported types, and project-specific scopes
• Defines description style rules (lowercase after colon, imperative mood, concise)
• Provides concrete examples for common changes

No code or build logic changes; documentation update only.

^{Written by Cursor Bugbot for commit c808060. This will update automatically on new commits. Configure here.}

[Copilot]

Pull request overview

This PR adds conventional commit guidelines to the CLAUDE.md file to establish standardized commit message formatting for the project.

Changes:

• Added conventional commit format specification with types, scopes, and description style guidelines
• Included project-specific scopes for shell implementations and subsystems
• Provided concrete examples of properly formatted commit messages

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.73%. Comparing base (7ff8eb6) to head (b53b56d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #459       +/-   ##
===========================================
+ Coverage   45.36%   76.73%   +31.36%     
===========================================
  Files          47       47               
  Lines        7221     6250      -971     
  Branches     7221     6250      -971     
===========================================
+ Hits         3276     4796     +1520     
+ Misses       1987     1102      -885     
+ Partials     1958      352     -1606     

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