feat: add proactive triggering example to agent-creator agent

[sjnims]

Summary

Added a 4th example to the agent-creator agent demonstrating proactive triggering, where Claude recognizes implicit agent needs without explicit "create an agent" requests.

Problem

Fixes #121

The agent-creator agent had 3 examples all demonstrating reactive triggering patterns. Per Claude Code subagent best practices, agents should also demonstrate proactive triggering to show Claude when to automatically invoke them.

Solution

Added a new proactive triggering example that shows:

• User describing agent-like functionality without explicitly requesting agent creation
• Assistant recognizing the implicit need and proactively triggering the agent-creator

Alternatives Considered

• Could add multiple proactive examples, but one well-crafted example suffices
• Could modify existing examples to be proactive, but keeping reactive examples is valuable for explicit requests

Changes

• plugins/plugin-dev/agents/agent-creator.md: Added 4th example demonstrating proactive triggering

Testing

• Agent validation script passes
• Markdownlint passes
• Example count now 4 (within recommended 2-4 range)

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🤖 Generated with Claude Code

[claude]

Claude finished @sjnims's task in 57s —— View job

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PR Review: Add Proactive Triggering Example to agent-creator

Summary

✅ Looks Good - This PR successfully adds a well-crafted proactive triggering example to the agent-creator agent.

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What's Good

1. Strong Proactive Pattern: The new 4th example (lines 32-39) demonstrates excellent proactive triggering:

   • User describes functionality ("something to automatically review code") without using words like "create agent" or "generate agent"
   • Assistant recognizes the implicit agent need and proactively invokes the agent-creator
   • Commentary explicitly calls out the proactive nature: "without explicitly requesting agent creation"

2. Realistic Scenario: The example feels natural - users often describe what they want rather than explicitly requesting agent creation, making this a valuable triggering pattern.

3. Consistent Structure: The example follows the exact same format as the existing 3 examples:

   • Context description
   • User message
   • Assistant response
   • Commentary explaining the trigger logic

4. Markdown Quality: ✅ Markdownlint passes with no issues

5. Aligns with Best Practices: Per the agent-development skill references, agents should demonstrate both explicit (reactive) and proactive triggering. This PR achieves that balance with 3 reactive + 1 proactive example.

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Checklist Verification

• ✅ Agent example count: Now 4 examples (within recommended 2-4 range per line 79)
• ✅ Proactive triggering: Successfully demonstrates proactive pattern
• ✅ Example structure: Follows established format (Context/user/assistant/commentary)
• ✅ Markdown linting: Passes validation
• ✅ Fixes [Feature]: Add proactive triggering example to agent-creator agent #121: Addresses the issue as described

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Minor Observations

The example placement is perfect - it's the 4th example after the 3 reactive ones, making it easy to see both patterns. The user message is realistic and the commentary clearly explains why proactive triggering is appropriate here.

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Recommendation: ✅ Approve and merge - This is a clean, focused improvement that enhances the agent-creator's triggering capabilities.