Your code ships fast.
Now it remembers why.
Keystone captures decisions and rationale automatically from the work you're already doing.
Join 272 engineers already waiting.
Agent ready
Works with
How Keystone works.
Engineering activity flows in. Structured memory flows out.
Synthesis over Ingestion
Extracts decisions, trade-offs, and rationale from diffs — not just indexes commits.
Contextual Awareness
Links PRs to tickets and conversations. Surfaces the "why" behind every change.
Architect's Second Brain
A RAG powered chat that knows more about your project than the original author.
Shipped. Shipping. Next.
Keystone is being built in the open. Here's where things stand.
GitHub ingestion pipeline
Commits, PRs, and issues synthesized automatically.
RAG-powered chat
Ask anything about your project history.
Decisions & rationale synthesis
Extracts the "why" behind every change.
MCP Server
Connect Keystone to your IDE or code agent.
Team workspaces
Multi-user orgs with roles and shared context.
Slack / Linear integrations
Surface insights where your team already works.
Follow live updates on @keystone_build
Code remembers.
Be first in line when Keystone opens early access.
Join 272 engineers already waiting.
Created by
Wences Martínez
Product Engineer · Agentic Engineer · Resizes