refactor: issue-agent - Move to root folder

[ashleyshaw]

Phase 2b: Move Issue Agent (Week 2)

Move scripts/automation/issue-agent/ → agents/issue-agent/ to align with portable agent organization per CLAUDE.md.

🎯 Why This Matters

Per .github/CLAUDE.md, portable, reusable agents belong in agents/ folder, not scripts/. The Issue Agent is a core agent (like Changelog Agent, PR Agent) and should live in the agents root.

✅ Deliverables

• Folder moved (no functional changes)
• All ~30 references updated:
  • Workflows (.github/workflows/*.yml)
  • Documentation (docs/, README.md`)
  • Instructions (instructions/issues.instructions.md)
  • Other prompts (prompts/)
  • Import statements in dependent files
• CI tests pass
• PR created and merged

📋 Files to Update

Folder & Path Changes:

• Move: scripts/automation/issue-agent/ → agents/issue-agent/
• Update all imports/paths in ~30 files

Critical References (Search for "scripts/automation/issue-agent"):

• .github/workflows/*.yml
• instructions/issues.instructions.md
• prompts/*.md
• docs/**/*.md
• .github/projects/active/**/*.md
• Import statements in:
  • Workflows
  • Other agents
  • Automation scripts
  • Test files

🧪 Testing

• All Jest/Vitest tests pass (115+ tests)
• CI validation passes
• No broken imports
• Documentation builds correctly

🔗 Related Issues

Epic: #2681
Phase 2a (Parallel): #2683 (Rename pr-agent)
Next Phase: #2685–#2688 (Phase 3: Integration)

📊 Risk Assessment

Risk: LOW-MEDIUM
Complexity: LOW (straightforward move)
Affected Teams: Automation, Workflows
Rollback: Easy (reverse move + push)

Timeline: 2026-09-11 to 2026-09-13
Effort: 2–3 hours (move + update references + test + PR)
Owner: Ashley Shaw

📝 Note

This move does NOT require functional changes to the Issue Agent itself. Phase 2 skills (2-7) remain in development on their own timeline. This is purely a structural reorganization.

[linear-code]

LS-3123

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