Free alternatives to contract-first
50 free AI Skills apps to use instead, best rated first.
Top picks
- W
webapp-testing
LaunchNative Python Playwright scripts for testing local web applications with server lifecycle management. Includes with_server.py helper to automatically start and manage single or multiple servers before running automation scripts. Supports re
- C
content-research-writer
LaunchAssists in writing high-quality content by conducting research, adding citations, improving hooks, iterating on outlines, and providing real-time feedback on
- O
openhue
Launchopenhue is an agent skill from the OpenClaw project, listed on skills.sh. It lets an agent control Philips Hue lights and scenes through a Hue Bridge with the OpenHue CLI: turn lights on and off, dim rooms, set scenes such as movie mode, an
- B
batch-grill-me
Launchbatch-grill-me is an agent skill from Matt Pocock's skills collection, listed on skills.sh. It interviews you relentlessly about a plan until you share an understanding. It maps decisions as a tree and asks every question it can answer now
- I
implement
Launchimplement is an agent skill from Matt Pocock's skills collection, listed on skills.sh. It implements work from a spec or tickets: it fetches the ticket, works test-first at agreed seams, runs type checks and tests as it goes, reviews the re
- F
frontend-design
LaunchDistinctive, production-grade frontend interfaces that reject generic AI aesthetics through intentional design choices. Guides aesthetic direction selection (brutalist, maximalist, retro-futuristic, luxury, organic, etc.) before implementat
More AI Skills apps
brainstorming
Transform rough ideas into fully-formed designs through structured questioning
finishing-a-development-branch
Guides completion of development work by presenting clear options
test-driven-development
Use when implementing any feature or bugfix, before writing implementation code
About contract-first
contract-first
Coordinate frontend/backend or service-to-service work through one authoritative
contract-first is an agent skill from the ECC collection by affaan-m, listed on skills.sh. It coordinates work across a boundary, whether frontend and backend or two services, through one authoritative contract that a machine can check. The contract can be OpenAPI, AsyncAPI, Protocol Buffers or JSON Schema. Consumers state what they need, providers implement that shape, and both sides verify against the same artifact before integration. The skill is about how a boundary is changed. It works alongside api-design, which covers what a good API looks like, and ai-regression-testing, which guards fixed bugs from returning. Typical triggers are frontend and backend work running in parallel, services exchanging payloads or events, field names and error shapes drifting, a consumer needing several calls because the provider exposed storage models, and mock responses that no longer match production. It suits teams where a change by one person or agent can break a consumer maintained by someone else. A skill is a SKILL.md file of instructions that an AI agent loads when a task calls for it. It is free and open source.
- Price
- Free
- Made by
- affaan-m
- Category
- AI Skills
- Website
- github.com/affaan-m/ecc/contract-first