v0.5.0

What's Changed

• feat(sync,cli): commonwealth redact — purge leaked secrets from git history (ADR-0037) by @kristoffeys in #277
• docs: add per-feature test-coverage matrix (#275) by @kristoffeys in #278
• feat(core,curate): record how a note entered the brain — ingestion trust tier (#274) by @kristoffeys in #282
• feat(core,curate): quiet-tick guard for the periodic maintenance passes (#273) by @kristoffeys in #284
• feat(mcp,core): surface retrieval diagnostics through search/ask MCP tools by @kristoffeys in #279
• docs: agent-friendliness self-audit of the MCP/CLI surface by @kristoffeys in #280
• feat: structured, persisted capture receipts for dropped candidates (#266) by @kristoffeys in #285
• fix(core,mcp): drop the uninformative clearedThreshold diagnostic, report pruned-candidate count instead by @kristoffeys in #287

Full Changelog: v0.4.0...v0.5.0