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CommunityJev Agents & MCP
Oko
Local code search for coding agents: ripgrep and BM25 shortlist function-level chunks, Jev Noul relevance questions run across parallel requests, and accepted excerpts return to Codex, Claude Code, OpenCode or Pi through MCP or the `oko ask` command.
- Stars
- 9
- Language
- Rust
- License
- MIT
- Published by
- Community
- Last verified
- Oct 2026
About this project
Help your coding agent find code faster and use fewer tokens. Oko helps Codex, Claude Code, and OpenCode spend less time searching and fewer tokens reading irrelevant code. It delivers relevant source snippets through MCP, and answers a code question as you send it, so your agent can get to the task sooner. Gains vary by task and coding tool. Each benchmark's method and caveats are in its section below.
Quoted from the project's README. Read the full README.
Works forJev for Ranking
Used inJev for Software & DevTools
- Languages
- Rust
- Capabilities
- Open sourceRuns locallyRequires API key
Highlights
- Agent sessions on nine tasks: 60-63% fewer tokens, 47-58% faster and 75-86% fewer tool calls versus built-in search.
- Agent Retrieval Bench: MRR 0.37 versus 0.24 for the best published method across 345 tasks in six languages.
- Delivers via MCP with `oko setup --client claude|opencode|pi|all`; a prompt hook answers a question before the first turn.
- MIT licensed; bundled ripgrep and checksum-verified binaries for macOS and Linux.
Watch out
MIT licensed. Jev ranking needs a TypeSafe API key (keyword-only mode works without one), macOS binaries are unsigned, and Windows is not supported by the installer.
Questions about this entry
Short answers drawn from the linked project or page.
No. Local keyword ranking works without a key, and `oko ask --no-jev` uses it; a TypeSafe key adds the Jev Noul relevance judgments used in the benchmarks.
Codex, Claude Code, OpenCode and Pi, through per-project setup that installs MCP configuration and search guidance; Codex prompts you to trust the hook once per project.
Run the install script from raw.githubusercontent.com; it detects your processor, downloads Oko and a bundled ripgrep, verifies the checksum and installs them without administrator access. Add ~/.local/bin to PATH to keep oko available in new terminals.
Oko uses your operating system's credential store. Headless Linux can use an environment variable or an ignored .env instead, and oko auth login, oko auth status and oko auth logout manage the saved key.
Normal search returns snippets and an answer as you send the question. --deep lets Oko investigate further with --max-steps, but it makes additional Jev requests and can take longer; --no-jev uses local keyword ranking only and needs no key.
The installer supports macOS Apple Silicon and Intel, and Linux ARM64 and x64 on glibc 2.35 or newer (Ubuntu 22.04 or newer). Alpine and Windows are not supported by the installer, and macOS binaries are not yet signed or notarized.
In Codex the prompt hook needs a one-time review: the first time you open the project after setup it shows Hooks need review, where you choose Trust all or read the hook first. It asks once per project, and again only if a later Oko release changes it.
Reactions & coverage
Posts, threads, and videos about this entry from around the web.
Hacker News: Show HN: Agent Chaperone screens tool calls and results with Jev before the agent sees them.
sepehrsafari5 pointsShow HN: Agent Chaperone – Screen AI agent tool calls and results with JevRead the thread on Hacker NewsX: jev-review: a local-first score loop for coding agents
Reddit: One command to wire Jev into Claude Code, Claude Desktop, and Codex.
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