Add skills: field to all 11 agent frontmatter files with forward-compatible
GSD workflow skill references (silently ignored until skill files are created).
Add commented hooks: examples to 9 file-writing agents showing PostToolUse
hook syntax for project-specific linting/formatting. Read-only agents
(plan-checker, integration-checker) skip hooks as they cannot modify files.
Per Claude Code docs: subagents don't inherit skills or hooks from the
parent conversation — they must be explicitly listed in frontmatter.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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