Fast and Accurate Code Search for Agents. Uses ~98% fewer tokens than grep+read.

Semble is a code search library built for agents. It returns the exact code snippets they need instantly, using ~98% fewer tokens than grep+read and cutting latency on every step. Indexing and searching a full codebase end-to-end takes under a second, with ~200x faster indexing and ~10x faster queries than a code-specialized transformer, at 99% of its retrieval quality (see benchmarks). Everything runs on CPU with no API keys, GPU, or external services.

Run it as an MCP server and any agent (Claude Code, Cursor, Codex, OpenCode, etc.) gets instant access to any repo, cloned and indexed on demand.

• Semble @ GitHub.

Make JSON greppable!

gron transforms JSON into discrete assignments to make it easier to grep for what you want and see the absolute 'path' to it. It eases the exploration of APIs that return large blobs of JSON but have terrible documentation.

Semantic search for agents.

A calm, CLI-native way to semantically grep everything, like code, images, pdfs and more.

• mgrep @ GitHub.

Related contents:

• Mgrep c'est quoi ? @ RayaneRachid's X.
• #161 - Veille tech et l'interview de Jessim @ Quoi de neuf les devs? :fr:.

⚡A CLI tool for code structural search, lint and rewriting. Written in Rust. Find Code by Syntax. structural search/rewrite tool for many languages.

ast-grep(sg) is a fast and polyglot tool for code structural search, lint, rewriting at large scale.

• ast-grep (sg) @ GitHub.
• ast-grep MCP Server @ GitHub.