Self-hosted alternatives to contract-first
5 self-hosted AI Skills apps to use instead, best rated first.
Top picks
- C

claude-to-deerflow
Launchclaude-to-deerflow is an agent skill that lets an assistant send messages and questions to a running DeerFlow instance through its HTTP API. DeerFlow is an AI agent platform built on LangGraph that orchestrates sub-agents for research, code
Self-hosted
- O

open-notebook
Launchopen-notebook is an agent skill for organising research with Open Notebook, a self-hosted alternative to NotebookLM. It arranges sources, notes and AI conversations into research notebooks. Sources can be PDFs, web pages, audio, video and O
Self-hosted
- R

Reactive Resume
LaunchReactive Resume is a free and open-source resume builder for writing resumes and cover letters, checking the work, and tracking job applications. You create a free account, import an existing resume or start from scratch, and see the finish
Open sourceSelf-hosted
- S

self-hosted-funnel-launch
LaunchSelf-hosted funnel launch is an agent skill that takes a funnel from an empty install to published on infrastructure you control, using the Autonnel funnel builder, which is licensed Apache-2.0. The result covers a landing page, checkout, a
Self-hosted
- G

get-convex/convex-backend
LaunchConvex is an open-source reactive database for web app developers. It combines a database, a place to write server functions in pure TypeScript, and client libraries that keep the app's data live, so screens update as the data changes. Beca
Self-hosted
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