Private Beta · Claude Code & opencode · 25+ Languages

Ship faster. Fail less.
Give your AI agent the context it needs.

SourceIndex pre-analyzes your codebase so your AI coding agent knows exactly where to look — it stops burning turns on exploration and starts building immediately.

64→87% Pass Rate on Hard Tasks
−36% Agent Time
−13% Cost (Claude Sonnet)
25+ Languages
Watch the Demo Get Early Access

How It Works

Index once, search per task, let the agent focus on building.

See it in action

1 INDEX scans ./faker once builds the index 2 SEARCH per-task roadmap 4 files · 6 funcs 3 AGENT builds w/ roadmap targeted edits only Index once · search per task · let the agent focus on building
sourceindex demo
1

Set Up Once

pip install sourceindex, then sourceindex init in your repo. It detects Claude Code or opencode automatically, indexes every file and function, and git hooks keep the index fresh as you commit.

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2

Search & Select

For each task, SourceIndex finds the relevant files and functions and builds a targeted roadmap — down to line ranges.

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3

Your Agent Just Works

Day-to-day you change nothing. Open your agent as usual — it pulls the roadmap on its own, skips exploration, and starts implementing immediately.

The Numbers

Measured on real feature-implementation tasks from public GitHub repos, graded by each repo's own tests.

Claude Code Claude Code + SourceIndex
Pass rate — hard tasks (9 repos, N=5) +23pts
Claude Code · 64%
+ SourceIndex · 87%
Agent time in your session −36%
Claude Code · 171s
+ SourceIndex · 109s

What that means in practice

Harder tasks land On two repos where Claude Code went 0-for-5, SourceIndex went 4/5 and 5/5.
Less waiting The agent spends far fewer turns exploring, so in-session time drops by about a third.
Slightly cheaper too −13% cost with Claude Sonnet, −3% with Opus — while passing more tasks.

16 tasks across 11 public repos, 4–5 runs per configuration, 240+ runs total, identical model and scaffold in both arms. See the full benchmark →

Built for Real Codebases

25+ Languages

Python, TypeScript, Rust, Go, Java, C/C++, Ruby, PHP, Swift, Kotlin, and more.

Nothing to Configure

One SourceIndex key is all you need. Our hosted backend handles the LLM calls — no provider accounts, no model picking, no extra bills.

Zero Workflow Change

After sourceindex init, day-to-day you do nothing. Your agent discovers and uses the index on its own.

Incremental Updates

Only changed files are re-indexed. Git hooks keep the index fresh with every commit.

AST-Grounded

Line ranges validated against tree-sitter AST. Precise read windows for the agent.

Claude Code & opencode

First-class integration with both, auto-detected per repo. More agents on the way.

Get Early Access

SourceIndex is in private beta — we're onboarding our first small cohort of testers now. Tell us about yourself and we'll get you set up with an access key.

We'll review your request and email you within 24 hours.