Keystone Lite
Product Get the latest build
Local-first Surgical edits BYO model Vibe-coder approved

Ship like a vibe coder.
Edit like a surgeon.

Keystone Lite is the local-first AI code editor built for developers who want precision, auditability, and control. Bring your own model, scope the context, and apply line-based edits you can review or auto-apply.

No vibe tax Cleaner diffs. Fewer regressions.
Scoped context Only the files you allow.
Auditable ops REPLACE / INSERT / DELETE by line.
Download the latest build See what’s different

Built for developers who want control

Keystone Lite keeps you in charge: you decide what files the model can see, you review the diff, and you apply edits with line-based operations.

Productive builders

Move fast without losing confidence. Keep diffs readable and changes scoped.

  • Smaller changes that are easy to review
  • Repeatable prompts with predictable output
  • Less churn in unrelated files

Security-minded teams

Local-first by design. Scope access and keep sensitive repos out of cloud prompts.

Local-first workflow Scoped file access Auditable operations

Maintainers & reviewers

Line-based ops make it obvious what changed, where, and why.

  • REPLACE / INSERT / DELETE by line number
  • Reviewable output before applying
  • Less guesswork during code review

Why Keystone Lite is different

Most AI tooling optimizes for “wow.” Keystone Lite optimizes for correctness, traceability, and control—without sacrificing speed.

Surgical edits, not rewrites

Get precise, line-based operations that map cleanly to diffs and PR reviews.

REPLACE lines X-Y INSERT after line X DELETE lines X-Y

Bring your own model

Use the model that fits your workflow. Swap providers without changing how you review edits.

  • Provider flexibility
  • Consistent edit format across models
  • Predictable output for automation

Scoped context by default

Only the files you explicitly allow are included. No accidental repo-wide context leaks.

Whitelist files Tight prompts Safer iteration

Core Features

Everything you need for intelligent code editing

🎯

Surgical Code Editing

Line-based insert, replace, and delete operations. The AI makes precise changes without touching unrelated code.

🧠

11+ LLM Providers

Access Groq, OpenAI, Anthropic, Gemini, Mistral, and our decentralized PIN network through a single API key.

📁

File Context Awareness

Add files to context with line numbers. The AI understands your entire codebase structure for better suggestions.

⚡

Real-Time Streaming

Watch code generate in real-time with streaming responses. See the AI think and build your solution live.

🖱️

Right-Click AI Actions

Select code, right-click, and choose from Explain, Fix, Improve, or Document. Context menu integration for fast workflows.

📝

Monaco Editor

The same editor that powers VS Code. Syntax highlighting for 50+ languages, IntelliSense, and keyboard shortcuts.

🔒

Secure File Operations

All file access is scoped to your project directory. The AI cannot read or write outside your workspace.

💬

Markdown Chat Rendering

Beautiful formatted responses with code blocks, syntax highlighting, and inline code. Easy to read, easy to copy.

Two Powerful Modes

Choose your workflow style

Debug Mode

Review Before Apply

Perfect for learning and critical code. Preview every change before it touches your files.

  • See exact line changes before applying
  • Collapsible code preview boxes
  • One-click "Apply All" button
  • Learn from AI's reasoning
Keystone Mode

Auto-Apply Edits

Maximum speed for experienced developers. Edits apply automatically as the AI responds.

  • Zero-click code application
  • Instant file updates
  • Rapid iteration workflow
  • Visual applied confirmation

Powered by 11+ Providers

Cloud LLMs and decentralized PIN network through one API

Built for Performance

50+
Languages Supported
11+
AI Providers
3
Edit Operations
1
API Key Needed

What developers say

Real-world feedback from people who care about diffs, reviews, and shipping safely.

“The line-based ops are the killer feature. I can review changes like a normal PR instead of hunting for what the model touched.”

A. Patel
Staff Engineer
Reviewable diffs

“Scoped context makes this usable at work. I can keep sensitive files out, still get help, and stay compliant.”

M. Chen
Security Engineer
Scoped access

“It’s the first AI editor that feels like a tool, not a slot machine. Predictable edits, clean output, fast iteration.”

J. Rivera
Indie Developer
Predictable output

Get the latest build

Download Keystone Lite and keep your workflow local-first, reviewable, and under your control. (Replace the links below with your real release URLs.)

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