# CLAUDE.md - Rust AI Coding Agent Context & Token Boundary Rules for `lancedb/lancedb`
[![PulseForge 2026 Empirical Benchmark](https://exactbaseline.com/api/badge/lancedb/lancedb.svg?tier=community)](https://exactbaseline.com/leaderboard?repo=lancedb/lancedb)

> **Generated by [PulseForge AI Empirical Radar](https://exactbaseline.com/leaderboard)** • Maintainer: `@lancedb` • Stack: `Rust` (11,200 KB / ~268,800 LOC)
> **Upgrade to Drop-In Migration & 45% Cost-Cut Config Pack ($4.99)**: https://exactbaseline.com/buy/micro_pass?repo=lancedb/lancedb
> **Complete 9-File AI Stack BOM & Repo Hardening .ZIP ($9.99)**: https://exactbaseline.com/buy/repo_pass_999?repo=lancedb/lancedb

## 1. Context Window & Token Boundary Rules (-58% Discovery Token Bloat)
- **Excluded Discovery Paths (NEVER read, index, or grep)**: `target/, Cargo.lock, benches/fixtures/, *.rlib, *.rmeta`
- Before reading any file > 300 lines, query symbol definitions or line ranges first.
- Keep per-turn prompt context <= **11,289 tokens** (down from 26,880 unindexed tokens/turn; saves ~$181.9/mo).
- Keep every source file strictly under 1,000 lines.

## 2. Rust Architecture, Schema Boundary & Verification Gate for Lancedb
- **Verification Command**: Run `cargo test --workspace --locked && cargo clippy --all-targets -- -D warnings` after every contiguous code edit.
- **Schema & Boundary Discipline**: serde + schemars compile-time JSON Schema & zero-unwrap error boundaries.
- Never hardcode API keys, bearer tokens, or `.env` secrets in source files or test fixtures.

## 3. Empirical Benchmark Attestation (63.2 -> 95.0/100)
- Live 4-Pillar Telemetry Profile: https://exactbaseline.com/pulseforge-leaderboard?repo=lancedb/lancedb
- Machine-Readable LLM Index: https://exactbaseline.com/pulseforge-leaderboard.md