Agents were misreading kb_search as keyword-only because the vector/semantic
component was only mentioned in the negative ("fts_only: no vector similarity").
Lead with hybrid semantic + BM25 + RRF in the server instructions, kb_search
docstring, and MCP.md so agents recognise it as a vector search tool.
Move MCP server documentation from README into dedicated MCP.md.
Add configuration examples for Claude Code, VS Code, Cursor,
Windsurf, and JetBrains IDEs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>