Show HN: Knock – stop Claude Code burning tokens exploring big codebases

Category: devtools

Tags: mcp, code-search, ai-agents, token-efficiency, local-first

Score: 6.0/10 (Innovation: 6, Technical: 6, Documentation: 7, Utility: 5)

Knock is an MCP server that indexes a repository locally and gives AI coding agents a compact, ranked 'map' of relevant code, docs, and decisions, reducing the tokens spent exploring large codebases. It pairs a SQLite-backed notes store with file/line provenance, staleness tracking, and a 'remember' tool so agents can reuse findings across sessions without sending code off-machine.

Target audience: AI-assisted developers and backend engineers working in large codebases

Repository: https://github.com/HasanGilani/knock · Python · Apache-2.0 · 1 stars

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