fix(agent-development): optimize description for capacity and clarity

[sjnims]

Description

Optimizes the agent-development skill description to improve capacity headroom and follow documentation best practices.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (improvements to README, CLAUDE.md, or component docs)
• Refactoring (code change that neither fixes a bug nor adds a feature)
• Configuration change (changes to .markdownlint.json, plugin.json, etc.)

Component(s) Affected

• Commands (/plugin-dev:*)
• Skills (methodology and best practices)
• Agents (requirements-assistant)
• Hooks (UserPromptSubmit)
• Documentation (README.md, CLAUDE.md, SECURITY.md)
• Configuration (.markdownlint.json, plugin.json, marketplace.json)
• Issue/PR templates
• Other (please specify):

Motivation and Context

The agent-development skill description needed optimization per issue recommendations:

1. Added "what it provides" clause - Description was ~90% trigger phrases, now starts with purpose
2. Condensed redundant trigger phrases - Reduced from 579 → 424 characters (27% reduction)
3. Removed duplicate suffix - "for Claude Code plugins" appeared at both start and end
4. Improved structure - Follows docs recommendation: "description should include both what the Skill does AND when to use it"

Result: 600 characters of headroom for future trigger phrase additions.

Fixes #23

How Has This Been Tested?

Test Configuration:

• OS: macOS Darwin 25.1.0
• Testing method: Character count verification

Test Steps:

1. Verified original description: 579 characters
2. Applied optimizations per issue recommendations
3. Verified new description: 424 characters (✅ under 900 target)
4. Ran markdownlint - no errors

Checklist

General

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings or errors

Documentation

• I have updated YAML frontmatter (if applicable)

Markdown

• I have run markdownlint and fixed all issues

Component-Specific Checks

Skills (if applicable)

• Description uses third-person with specific trigger phrases
• SKILL.md is under 2,000 words (progressive disclosure)

Testing

• I have tested the plugin locally

Additional Notes

Before (579 chars):

This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "design an agent for [task]", "how do I write agent descriptions", "what are the agent frontmatter fields", "validate my agent", "test agent triggering", "how to restrict agent tools", "what colors can agents use", "autonomous agent", "difference between agent and skill", "agent vs command", "when should I use an agent", "agent schema", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.

After (424 chars):

This skill provides comprehensive agent development guidance for Claude Code plugins. Use when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "validate my agent", "test agent triggering", "agent tools", "agent colors", "autonomous agent", "agent vs skill", "agent vs command", "when to use agents", or needs guidance on agent structure, system prompts, or triggering conditions.

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🤖 Generated with Claude Code

[claude]

Claude finished @sjnims's task —— View job

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PR Review: fix(agent-development): optimize description for capacity and clarity

Reviewing PR #27 by @sjnims...

Tasks

• Get PR diff to understand changes
• Read changed files for context
• Run markdownlint on changed .md files
• Review skill description optimization
• Review CLAUDE.md changes
• Post comprehensive review

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Summary

✅ Looks good - This PR successfully optimizes the agent-development skill description and adds helpful documentation to CLAUDE.md.

---

What's Good

1. Description Optimization (SKILL.md)

The skill description optimization is excellent:

• Before: 579 characters - mostly trigger phrases, no clear purpose statement
• After: 424 characters - starts with purpose, streamlined trigger phrases
• Result: 27% reduction with 600 characters of headroom

The new description follows best practices from the documentation:

• ✅ Starts with "what it provides" clause: "This skill provides comprehensive agent development guidance for Claude Code plugins."
• ✅ Follows with trigger conditions: "Use when the user asks to..."
• ✅ Condensed redundant phrases without losing coverage
• ✅ Removed duplicate "for Claude Code plugins" suffix

2. Trigger Phrase Consolidation

Smart consolidation of trigger phrases:

• "how do I write agent descriptions" → "agent frontmatter" (more concise)
• "what are the agent frontmatter fields" → covered by "agent frontmatter"
• "how to restrict agent tools" → "agent tools"
• "what colors can agents use" → "agent colors"
• "when should I use an agent" → "when to use agents"
• Removed "design an agent for [task]" and "agent schema" (less common phrasings)

This maintains trigger coverage while significantly reducing character count.

3. CLAUDE.md Enhancement

The addition to CLAUDE.md is valuable but appears to be from a previous commit (984ff69). The current PR only modifies the skill description.

4. Markdown Linting

✅ All markdown files pass markdownlint validation with no errors.

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Suggestions

Minor: Consider Retaining One Additional Trigger Phrase

The phrase "design an agent for [task]" was removed. This is a natural user phrasing that might be worth keeping for better trigger coverage. Consider:

description: This skill provides comprehensive agent development guidance for Claude Code plugins. Use when the user asks to "create an agent", "add an agent", "write a subagent", "design an agent for [task]", "agent frontmatter", ...

This would add ~30 characters but improve triggering for a common user intent. However, this is optional - the current set is comprehensive.

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Checklist Verification

Comparing against the PR checklist:

• ✅ Code style: Follows skill description conventions
• ✅ Self-review: Clear optimization rationale provided
• ✅ No new warnings: Clean markdownlint output
• ✅ YAML frontmatter: Updated correctly
• ✅ Third-person with trigger phrases: "This skill provides... Use when..."
• ✅ Progressive disclosure: SKILL.md remains well-structured
• ✅ Local testing: Author confirmed testing

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Technical Details

File Changes:

• plugins/plugin-dev/skills/agent-development/SKILL.md: Line 3 (description field only)

Character Count Analysis:

• Original: 579 characters
• Optimized: 424 characters
• Reduction: 155 characters (27%)
• Remaining capacity: 476 characters (to 900 target)

Triggering Coverage Maintained:
The optimized description still covers all major user intents:

• Agent creation workflows
• Agent metadata/configuration
• Agent validation/testing
• Agent comparison (vs skills/commands)
• Agent best practices

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Recommendation

Approve and merge. This PR achieves its stated goals:

1. ✅ Adds "what it provides" clause per docs best practices
2. ✅ Condenses redundant trigger phrases (27% reduction)
3. ✅ Removes duplicate suffix
4. ✅ Provides 600 characters of headroom

The optimization maintains comprehensive trigger coverage while significantly improving capacity headroom. The optional suggestion to add back "design an agent for [task]" is minor and at the author's discretion.

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[claude]

Claude finished @sjnims's task —— View job

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PR Review: fix(agent-development): optimize description for capacity and clarity

Reviewing PR #27 by @sjnims...

Tasks

• Get PR diff to understand changes
• Read changed files for context
• Run markdownlint on changed .md files
• Review skill description optimization
• Review CLAUDE.md changes
• Post comprehensive review

---

Summary

✅ Looks good - This PR successfully optimizes the agent-development skill description and adds helpful documentation infrastructure to CLAUDE.md.

---

What's Good

1. Description Optimization (SKILL.md)

The skill description optimization is excellent and achieves all stated goals:

Before (579 characters):

This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "design an agent for [task]", "how do I write agent descriptions", "what are the agent frontmatter fields", "validate my agent", "test agent triggering", "how to restrict agent tools", "what colors can agents use", "autonomous agent", "difference between agent and skill", "agent vs command", "when should I use an agent", "agent schema", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.

After (424 characters):

This skill provides comprehensive agent development guidance for Claude Code plugins. Use when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "validate my agent", "test agent triggering", "agent tools", "agent colors", "autonomous agent", "agent vs skill", "agent vs command", "when to use agents", or needs guidance on agent structure, system prompts, or triggering conditions.

Key improvements:

• ✅ Adds purpose statement: "This skill provides comprehensive agent development guidance for Claude Code plugins" clearly states what the skill does
• ✅ Follows CLAUDE.md convention: Now matches the pattern "description should include both what the Skill does AND when to use it" (line 51)
• ✅ Significant reduction: 27% character reduction (579 → 424 chars)
• ✅ Ample headroom: 476 characters remaining to the 900 target, providing 600+ chars of headroom for future additions
• ✅ Smart consolidation: Condensed verbose phrases while maintaining coverage:
  • "how do I write agent descriptions" + "what are the agent frontmatter fields" → "agent frontmatter"
  • "how to restrict agent tools" → "agent tools"
  • "what colors can agents use" → "agent colors"
  • "when should I use an agent" → "when to use agents"
  • "difference between agent and skill" → "agent vs skill"
• ✅ Removed duplicate suffix: "for Claude Code plugins" no longer appears twice

2. Trigger Coverage Maintained

Despite the reduction, all major user intents remain covered:

• Agent creation workflows ✓
• Agent metadata/configuration ✓
• Agent validation/testing ✓
• Agent comparison (vs skills/commands) ✓
• Agent best practices ✓

3. CLAUDE.md Enhancement (Commit 7381fc5)

The addition of the "Quick Reference" section with version tracking is valuable:

• Supports the version-check.yml workflow
• Provides easy version lookup for developers
• Follows standard documentation patterns

4. Markdown Linting

✅ All markdown files pass markdownlint validation with zero errors.

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Suggestions

Optional: Consider One Additional Trigger Phrase

The phrase "design an agent for [task]" was removed as part of the optimization. This is a natural user phrasing pattern that might be worth considering for retention:

description: This skill provides comprehensive agent development guidance for Claude Code plugins. Use when the user asks to "create an agent", "add an agent", "write a subagent", "design an agent for [task]", "agent frontmatter", ...

This would add ~30 characters but could improve triggering for users who phrase requests as "design an agent for X." However, this is purely optional - the current trigger phrase set is comprehensive and well-balanced.

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Technical Analysis

Files Changed:

1. plugins/plugin-dev/skills/agent-development/SKILL.md - Line 3 (description field only)
2. CLAUDE.md - Lines 9-11 (Quick Reference section addition)

Character Count Analysis:

• Original description: 579 characters
• Optimized description: 424 characters
• Reduction: 155 characters (26.8%)
• Target limit: 900 characters (soft guideline)
• Remaining capacity: 476 characters
• Headroom gain: 600+ characters for future additions

Skill Description Best Practices Compliance:

• ✅ Third-person voice: "This skill provides..."
• ✅ Purpose statement: Clear "what it does" clause
• ✅ Trigger conditions: "Use when the user asks to..."
• ✅ Specific trigger phrases: Multiple quoted examples
• ✅ Comprehensive coverage: All major use cases included

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Checklist Verification

Comparing against the PR checklist:

General:

• ✅ Follows style guidelines (skill description conventions)
• ✅ Self-review performed (clear optimization rationale in PR body)
• ✅ No new warnings or errors

Documentation:

• ✅ YAML frontmatter updated correctly

Markdown:

• ✅ markdownlint passes with zero errors

Skills:

• ✅ Description uses third-person with specific trigger phrases
• ✅ SKILL.md remains under 2,000 words (progressive disclosure maintained)

Testing:

• ✅ Author confirmed local testing

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Recommendation

✅ Approve and merge. This PR successfully achieves all stated objectives:

1. ✅ Adds "what it provides" clause per documentation best practices
2. ✅ Condenses redundant trigger phrases (27% reduction)
3. ✅ Removes duplicate suffix
4. ✅ Provides 600 characters of headroom for future enhancements
5. ✅ Maintains comprehensive trigger coverage
6. ✅ Passes all linting and validation checks

The optimization demonstrates thoughtful balance between capacity management and discoverability. The optional suggestion to potentially add back "design an agent for [task]" is minor and entirely at the author's discretion.

Quality indicators:

• Clear problem statement (issue fix(agent-development): description at 99% capacity limit (1,015/1,024 chars) #23)
• Well-documented changes in commit messages
• Follows repository conventions (CLAUDE.md guidelines)
• Maintains backward compatibility (all core triggers retained)

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