README.md

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Know the words—or don’t. Just zg.

The local-first search layer for humans and agents.

🎬 Tour | 💫 Features | 🚀 Try it yourself | 📚 Docs | 📊 Benchmarks | 🤝 Community

zg (zvec-grep) unifies ripgrep, BM25, and vector search behind one local-first interface. Use it directly from the terminal, or let your agent use it for you.

🎬 See it in action

💫 Why zg?

• Ready for humans and agents — install once, index once, then use the same workspace from the CLI or your agent on macOS, Linux, and Windows.
• Search beyond keywords — discover by meaning, rank by relevance, then verify with exact text or regex when needed.
• Multi-format search — search source code, documents, and structured data while preserving useful structure and source locations.
• Less searching, less context — ranked, source-linked results surface the right evidence with fewer tool calls, fewer tokens, and less noise.
• Local by default — files, indexes, and local models stay on your machine; remote embeddings receive data only with your permission.

🚀 Try it yourself

1. Set up a sample bookshelf

# Requires Node.js 22 or newer.
npm install -g @zvec/zvec-grep

mkdir zg-mystery && cd zg-mystery
curl --retry 3 --retry-all-errors --progress-bar -fL \
  -o alice-in-wonderland.txt https://raw.githubusercontent.com/GITenberg/Alice-s-Adventures-in-Wonderland_11/master/11.txt \
  -o sherlock-holmes.txt https://raw.githubusercontent.com/GITenberg/The-Memoirs-of-Sherlock-Holmes_834/master/834.txt

zg index --embedding local/potion-retrieval-32m

2. Choose how to search

For agents: ask with OpenCode

With OpenCode configured:

zg install --target opencode --yes
opencode run --model opencode/deepseek-v4-flash-free \
  "An unseen creature left a few marks. What did the detective infer? Cite local evidence."

OpenCode chooses zg on its own—the prompt does not name a tool.

⚙ zvec_grep_zvec_grep_search {"root":".../zg-mystery","query":"An unseen creature left a few marks. What did the detective infer?","fts":["marks","unseen creature","inferred","detective"],"fuse":true}
→ Read sherlock-holmes.txt [offset=5440, limit=120]

Answer:
The detective is Sherlock Holmes in *The Adventure of the Crooked Man*.
From the animal's foot-marks, he inferred:

- It was not a dog, cat, monkey, or other familiar creature: its print had
  five foot-pads, long nails, and was nearly as large as a dessert-spoon
  (sherlock-holmes.txt:5479-5486).
- It had a long body and very short legs: nearly two feet long, but with a
  stride of only about three inches (sherlock-holmes.txt:5497-5502).
- It was carnivorous because it climbed the curtain toward a canary's cage
  (sherlock-holmes.txt:5509-5510).
- It was probably from the weasel or stoat tribe, though unusually large
  (sherlock-holmes.txt:5514-5516).

Holmes also inferred that a man entered through the window with it and later
left with the key (sherlock-holmes.txt:5464-5470, 5527-5528).

For humans: search directly

Search the same bookshelf directly, without an agent:

zg query --human "An unseen creature left a few marks. What did the detective infer?" --limit 3

zg returns the relevant passages from sherlock-holmes.txt, ranked ahead of alice-in-wonderland.txt.

📊 Benchmarks

Each benchmark uses paired A/B runs with tasks, agent/model, prompt, environment, and limits held constant; only zg access and usage guidance differ.

See the benchmark documentation for full results and reproduction details.

1. Cross-Domain Agent Benchmark

SWE-QA-Bench uses Claude Code with Claude Opus 5 at high reasoning effort; BrowseComp-Plus uses Codex gpt-5.6-sol at medium reasoning effort. Both zg profiles use Qwen3.7 Text Embedding.

• Why it helps: semantic discovery narrows the search space, ranked lexical retrieval anchors exact identifiers, and compact evidence reduces broad scans, repeated tool calls, and model context.
• Why it generalizes: the same retrieval loop works across domains—code is indexed with symbols, signatures, and breadcrumbs, while prose is retrieved as focused sections and chunks.

2. Real-World Case Studies

• Pylint — Python static analysis: the task asks how AST node handling separates annotated and non-annotated attribute initialization. Symbol-aware retrieval is useful because the architectural entry point is not known in advance.
• Matplotlib — plotting and rendering: the task traces FontInfo and font selection through multiple math-text rendering stages. Ranked semantic and lexical evidence helps reconstruct the cross-file data and control flow.
• Django — web framework: the task connects username uniqueness, ORM transactions, and formset bulk operations. Compact ranked evidence brings the distributed design rationale together.

zg works best when evidence spans files or modules and the target location is unknown, especially for call-chain, data-flow, and architectural questions. Since agents decide when and how to use it, results vary by model and run; repeated-run averages are more reliable.

📚 Documentation

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❤️ Contributing

Community contributions are always welcome—bug fixes, features, and documentation improvements all help make zvec-grep better.

Check out our Contributing Guide to get started!