Addresses code-review warnings on PR #75:
- renderCategoryRoutingYAML now builds yaml.Node + yaml.Marshal, escaping
YAML-reserved chars in role names correctly (was JSON-as-YAML, fragile on
unicode line separators).
- New appendYAMLBlock helper guarantees a newline boundary when concatenating
YAML fragments into config.yaml (category_routing + initial_prompt both
used to risk merging into the previous line).
- Fixed struct comment (replace-per-key, not UNION).
- Added TestCategoryRouting_EscapesYAMLSpecials and TestAppendYAMLBlock_NewlineGuard.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
608d6745b6