Replaced relative path references to sibling projects (../tinkerer/CLAUDE.md,
../crucible_framework, ../cns) with plain text descriptions. These paths are
invalid in the context of eval_ex standalone documentation generation.

Changes:
- Updated CNS 3.0 Agent Playbook reference to descriptive text
- Replaced project links with monorepo references
- mix docs now completes without warnings or errors

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>