A shared memory for your coding agent
Build with intent.
Ship with proof.
You describe the work. Your coding agent builds it. SPEC//OS keeps the context, decisions and evidence connected as your project evolves.
Explore a public example · no sign-in Codex Claude Code CursorCONNECTED THROUGH MCP
THE DEVELOPMENT LOOPINTENT → EVIDENCE
Your intent
What to build. What must stay true.
SPEC//OSThe shared project context
SpecificationsConstraintsEvidence
Your coding agent
Plans, implements and runs the checks.
Verified results return to the project.
Where are we starting?
01 / CHOOSE YOUR PATH01
Describe it once
Keep the brief, architecture and decisions with the project, across sessions and agents.
02
Build with your agent
Work in Codex, Claude Code or Cursor. The agent uses SPEC//OS as it writes and verifies your code.
03
Know what is proven
Connect requirements to real tests and evidence. See what passed and what still needs work.