Chalk Labs
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Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/0xzahed-api-contracts
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
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About
Use cases: design, backend
Reviews
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Permissions
What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/api-contracts
What's inside
- Skill name
api-contracts- Description
- Design clear, consistent API contracts. Use when defining endpoints, schemas, and semantics.
- License
- MIT
- Metadata
- tags: api, contracts
- Instructions
- 30 lines in SKILL.md · view on GitHub
Files (1)
- SKILL.md
SKILL.md (first lines)
# API Contract Design ## Use this skill when - Designing REST/GraphQL/RPC endpoints - Defining schema, naming, and status semantics - Reviewing contracts for consistency and evolvability ## Do not use this skill when - Implementing endpoints in a framework (use framework skills) - Documenting (use openapi-engineering) ## Instructions 1. Define the resource model and operations first, then choose verbs/status. 2. Name resources as nouns and keep URLs hierarchy logical and short. 3. Never expose internal field names; use API vocabulary. 4. Define consistent field naming: casing policy, dates as ISO-8601, enums as strings. 5. Specify status codes precisely: 200/201/204, 4xx for client errors with validation details. 6. Handling pagination, filtering, and sorting consistently. 7. Design for evolution: additive changes, versioning strategy, tolerance to unknown fields. 8. Write the contract in OpenAPI and keep implementation in sync. ## Output Format - Resource map | endpoint spec | field conventions | versioning policy ## Common Mistakes - URLs exposing DB concepts - Inconsistent error shapes across endpoints - Breaking contracts without a migration plan
From 0xzahed/antigravity-skills, MIT.
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Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Sep 16, 2026 (1 month ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/0xzahed/antigravity-skills
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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- 0.528score
api-contract-auditor
0xzahed
Audit API contracts for correctness and consistency.
SkillBFreshness: BClaude Code +9 - 0.524score
ambiguity-detection
0xzahed
Detect ambiguous or contradicting wording in requirements and specs.
SkillBFreshness: BClaude Code +9 - 0.523score
acceptance-criteria
0xzahed
Write and refine acceptance criteria for user stories.
SkillBFreshness: BClaude Code +9 - 0.523score
adr-engineering
0xzahed
Record architecture decisions with ADRs.
SkillBFreshness: BClaude Code +9 - 0.523score
alerting-engineering
0xzahed
Design alerting that gets paged for the right reasons.
SkillBFreshness: BClaude Code +9 - 0.523score
angular-development
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Build Angular applications.
SkillBFreshness: BClaude Code +9
Done for you
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Chalk Labs scopes, builds and runs agents for your team: the task audit, the eval harness, the integrations and the weekly ops report. Fixed scope, priced before we start.
See how we build AI agents →Read the case studies
Chalk Labs is a two-founder AI and growth studio. We build AI agents, CRMs and MVPs for Web3 and AI companies, and have shipped 50+ product and token launches.
- launches shipped
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- launches shipped
- media placements
- 500+
- media placements
- founders on every account
- 2
- founders on every account
Press we've placed: Forbes · CoinDesk · Decrypt · Cointelegraph · The Block
Rahil Jain, Co-founder, Chalk Labs. Ex-Goldman Sachs engineer. You talk to the person who builds it.
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Cite this page
api-contracts skill. Agent Mart. https://agentmart.dev/skills/0xzahed-api-contracts (last updated 2026-10-24)