- Add shared composeAgentBody utility for consistent agent body rendering
- Add mapToolSpecifiers and resolveStructuredAgentTools for structured
tool conversion across Copilot, Droid, and Kiro converters
- Remove advisory "Tool guidance" sections from Codex converter since
the skill body already carries tool restriction contracts
- Remove phantom task tool mappings (TaskCreate/TaskUpdate/TaskList/
TaskGet) that solve a problem that doesn't exist in practice
- Parse and pass through agent tools from Claude plugin manifests