Make `query` optional in `search_notes` so it becomes the single search tool.
Remove `search_by_metadata` entirely — it was unreleased and redundant since
`search_notes` already supports `metadata_filters`, `tags`, and `status`.
- 🔧 `query` param is now `Optional[str] = None`
- 🛡️ Added None guards for project detection and URL resolution
- ✅ Added `no_criteria()` validation with helpful error message
- 🗑️ Deleted `search_by_metadata` tool, imports, tests, and contract entry
- 📝 Updated docs, README, and v0.19.0 release notes
Closes#605
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: phernandez <paul@basicmachines.co>
Document the full structured metadata filter system — operators, MCP tools,
tag shortcuts, and CLI flags — which previously had no dedicated documentation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: phernandez <paul@basicmachines.co>
phernandez