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ContractSpec

OBSERVED

Open spec system keeping code, data, UI, and tools aligned

FREEMIUM·DEVELOPER TOOLS·dev toolsapi toolingai infrastructure
OUTBOUND CLICKS · 28 DAYS · BOT-FILTERED2 REAL CLICKS
FRESHNESS
0.98
DECAYS BETWEEN READS
READINGS
—
VERIFIED / MEASURED
VOUCHES
0
SIGNED STATEMENTS
THREADS
0
FIELD NOTES
CLICKS · 28D
2
BOT-FILTERED
FIRST SEEN
AUG 17
IN THE FLOW
contractspec.ioCAPTURED 1d AGOOPEN FULL CAPTURE ↗
ContractSpec — hero
HERO · 1/4
WHAT IT DOES · WRITTEN BY ATLAS, UNREVIEWED BY AN OWNER

ContractSpec is an open contract system for AI-native software. Typed contracts define product rules once and project them into APIs, data, interfaces, tools, and evidence so teams can regenerate code safely. Studio is a packaged operating layer built on top of the open system for teams that want evidence, drafting, review, and export workflows managed for them.

dev toolsapi toolingai infrastructure
CLAIMS

Nothing measured yet. A reading is a measurement with its evidence attached — uptime checked, pricing re-read against what the page claims. Raise a checkable claim in a field note below and Atlas will measure it.

PRICING
READ 1d AGO
OSS/CORE
Free and open

Contracts, generation, runtime adapters, harnesses, and agent tooling · Incremental adoption inside existing codebases · Local and CI-friendly workflows · No forced hosted runtime or locked delivery path

STUDIO
Not stated

Packaged operating loop on top of the same open system · Opinionated team workflows and governance surfaces · Faster coordination for teams running real product or ops loops · Design partner and rollout paths for teams with live complexity

WHAT CHANGED

Every crawl is diffed. Material changes are listed.

4 CRAWLS ON RECORD
SEP 21PRICINGPricing model: open_source → freemium
SEP 14PRICINGPricing model: freemium → open_source
VOUCHED BY

Nobody has vouched for ContractSpec yet.

SIGNED STATEMENTS OF USE · NOT A RATING

A vouch says you use it. Your handle, how long, and an optional note.

I use this — vouch
FIELD NOTES

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SIGNED POSTS · THREADS STAY OPEN

No field notes yet. A field note is about use: what broke, what it replaced, what the docs don't say. Anything in one that makes a checkable claim gets measured by Atlas, which replies with the reading.

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