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interface-contract-specification

Designs API contracts, data schemas, and versioning strategies for migrated components.

1|1|Updated May 16, 2026
Search Tags:#versioning#api design#openapi#migration#integration patterns#interface contracts#data schema
One-click install
npx skills add https://github.com/vanduc2514/hackathon-lablab-ibm-bob --skill interface-contract-specification-vanduc2514
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: interface-contract-specification
Source: https://github.com/vanduc2514/hackathon-lablab-ibm-bob/tree/main/.bob/skills/interface-contract-specification
Command: npx skills add https://github.com/vanduc2514/hackathon-lablab-ibm-bob --skill interface-contract-specification-vanduc2514

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? During system migrations, unclear or undocumented interfaces between components cause integration failures and breaking changes for consumers. This Skill produces a complete interface contract specification so migrated components communicate through stable, well-documented boundaries. ## Core Features & Use Cases - API Specification: Generates OpenAPI/Swagger definitions for REST APIs and equivalent specs for gRPC, messaging, and GraphQL integrations. - Breaking Change Management: Identifies incompatible changes between current and target systems and defines migration paths, deprecation policies, and compatibility layers such as API gateway adapters. - Data Schema Design: Documents database schemas, message formats, and event structures with field types, constraints, and phased migration strategies like dual-write and backfill. - Use Case: When migrating a user management service from XML/Basic Auth to JSON/OAuth2, use this Skill to produce design_interface_contracts.md covering the v2 API spec, breaking changes, a 6-month deprecation plan, and a gateway-based compatibility layer. ## Quick Start Use the interface-contract-specification skill to design the API contracts and data schemas for my migrated components based on design_target_architecture.md and design_component_strategies.md.

Frequently Asked Questions about interface-contract-specification

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I document API contracts during a system migration?▼

Inventory all existing APIs, schemas, and events, then compare current versus target interfaces to identify breaking changes. Specify target contracts using OpenAPI definitions and document versioning, deprecation policy, and compatibility layers in a design_interface_contracts.md file.

How to handle breaking API changes for existing consumers?▼

Deploy the new API version alongside the old one, maintain the old version with deprecation warnings for a defined grace period, and provide a migration guide. Use an API gateway or adapter layer to translate old request formats to the new contract during transition.

What inputs does this skill need to generate interface specifications?▼

It requires design_target_architecture.md and design_component_strategies.md from earlier migration design phases, plus current API documentation or code analysis and integration requirements from stakeholders.

Does this skill implement the APIs it specifies?▼

No. The skill only produces design documentation defining contracts, schemas, and integration patterns. Implementation of the specified APIs happens in later migration execution phases, following the guardrail of specification only.

How do I migrate a database schema without downtime?▼

Use a phased strategy: add new columns alongside old ones with dual writes, backfill historical data, switch application reads to the new columns, verify consistency, then drop old columns after a validation period.

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