API Designer
Jeffallan/claude-skills
Designs REST and GraphQL APIs from resource modeling to an OpenAPI 3.1 contract, with versioning, pagination and RFC 7807 error handling.
API 契约架构专家 Owner — 当任务涉及 public API、HTTP/SDK/CLI 契约、版本兼容、错误模型、分页过滤、幂等、Schema、类型、迁移或消费者影响时使用；要求先冻结消费者契约，再设计实现与验证。
Install API Contract Architecture
$ npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install devcodex-labs/devcodex api-contract-architecture --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/devcodex-labs/devcodex.git skills-src && mkdir -p .claude/skills && cp -r skills-src/content/skills/api-contract-architecture .claude/skills/api-contract-architecture && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "api-contract-architecture" agent skill from https://github.com/devcodex-labs/devcodex/tree/main/content/skills/api-contract-architecture into .claude/skills/api-contract-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-contract-architecture", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/devcodex-labs/devcodex/tree/main/content/skills/api-contract-architectureType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install devcodex-labs/devcodex api-contract-architecture --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/devcodex-labs/devcodex.git skills-src && mkdir -p .agents/skills && cp -r skills-src/content/skills/api-contract-architecture .agents/skills/api-contract-architecture && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "api-contract-architecture" agent skill from https://github.com/devcodex-labs/devcodex/tree/main/content/skills/api-contract-architecture into .agents/skills/api-contract-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-contract-architecture", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install devcodex-labs/devcodex api-contract-architecture --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/devcodex-labs/devcodex.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/content/skills/api-contract-architecture .cursor/skills/api-contract-architecture && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "api-contract-architecture" agent skill from https://github.com/devcodex-labs/devcodex/tree/main/content/skills/api-contract-architecture into .cursor/skills/api-contract-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-contract-architecture", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/devcodex-labs/devcodex.git --path content/skills/api-contract-architecture--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install devcodex-labs/devcodex api-contract-architecture --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/devcodex-labs/devcodex.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/content/skills/api-contract-architecture .gemini/skills/api-contract-architecture && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "api-contract-architecture" agent skill from https://github.com/devcodex-labs/devcodex/tree/main/content/skills/api-contract-architecture into .gemini/skills/api-contract-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-contract-architecture", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install devcodex-labs/devcodex api-contract-architectureInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/devcodex-labs/devcodex.git skills-src && mkdir -p .github/skills && cp -r skills-src/content/skills/api-contract-architecture .github/skills/api-contract-architecture && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "api-contract-architecture" agent skill from https://github.com/devcodex-labs/devcodex/tree/main/content/skills/api-contract-architecture into .github/skills/api-contract-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-contract-architecture", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install devcodex-labs/devcodex api-contract-architecture --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/devcodex-labs/devcodex.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/content/skills/api-contract-architecture .opencode/skills/api-contract-architecture && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "api-contract-architecture" agent skill from https://github.com/devcodex-labs/devcodex/tree/main/content/skills/api-contract-architecture into .opencode/skills/api-contract-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-contract-architecture", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
api-contract-architecture- GitHub stars
- 439
- Token cost
- ~865 tokens
- SKILL.md length
- 182 words
- Files
- 2
- Skills in repo
- 70
- Repo updated
- First seen
- Licence
- AGPL-3.0
At a glance
API 契约架构专家 Owner — 当任务涉及 public API、HTTP/SDK/CLI 契约、版本兼容、错误模型、分页过滤、幂等、Schema、类型、迁移或消费者影响时使用；要求先冻结消费者契约，再设计实现与验证。
- Works in 7 steps: 列出所有消费者：前端、SDK、CLI、Hook、文档示例、测试、外部系统。 → 冻结现状契约：字段、类型、错误、版本、默认值、边界条件。 → 执行… → …
- Tasks that involve API design
- SKILL.md covers 定位, 触发条件, 核心门禁 and 执行步骤, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
API Contract Architecture is an agent skill from devcodex-labs/devcodex. API 契约架构专家 Owner — 当任务涉及 public API、HTTP/SDK/CLI 契约、版本兼容、错误模型、分页过滤、幂等、Schema、类型、迁移或消费者影响时使用；要求先冻结消费者契约，再设计实现与验证。
Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `intent.json`).
It sits in Backend & APIs, covering API design. The repository describes itself as: Intent-driven AI coding workflow runtime for consistent context, skills, approvals, validation, and handoffs across six AI coding hosts. The licence is AGPL-3.0.
When your agent uses it
- Tasks that involve API design
Example prompts
- “/api-contract-architecture”
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- 列出所有消费者：前端、SDK、CLI、Hook、文档示例、测试、外部系统。
- 冻结现状契约：字段、类型、错误、版本、默认值、边界条件。
- 执行 ReleaseAuthorityBeforeCompatibilityGate：核对 tag/registry/release note/public docs/实际消费者；已发布才进入兼容评估，未发布且无稳定消费者默认直接收敛，未发布但存在产品取舍则交用户决策，事实不明…
- 定义目标契约与兼容策略：新增、保留、弃用、迁移、拒绝。
- 为错误模型、分页过滤、幂等和重试写稳定语义；CLI JSON 合同还要冻结 success/failure 字段互斥和 exit=0/1/2 映射。
- 若合同存在 discriminator 或条件完成态，执行 cross-variant 字段注入与完成证据删除/反转 mutation；Schema、semantic validator、docs field set 与 runtime 必须给出同一结论。
- 把契约映射到文档、示例、.http / .cjs、types、runtime probe。
What it can do on your machine
Read from SKILL.md and the folder at commit 1dd4525. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
API Contract Architecture loads about 865 tokens when it runs. Until then it costs about 35 tokens; SKILL.md has 182 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from devcodex-labs/devcodex at commit 1dd4525, republished under its AGPL-3.0 licence (© devcodex-labs). 182 words, ~865 tokens.
Download SKILL.mdSave it as
.claude/skills/api-contract-architecture/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- api-contract-architecture
- description
- API 契约架构专家 Owner — 当任务涉及 public API、HTTP/SDK/CLI 契约、版本兼容、错误模型、分页过滤、幂等、Schema、类型、迁移或消费者影响时使用；要求先冻结消费者契约，再设计实现与验证。
API Contract Architecture Skill
定位
本 Skill 负责 API 契约 Owner 视角。它确保方案先回答“谁消费、契约是什么、如何兼容、如何验证”，再进入实现细节。
触发条件
| 场景 | 是否触发 |
|---|---|
| 新增或调整 HTTP API、SDK API、CLI 参数、Hook payload、MCP tool/resource、事件、配置 Schema 或 public types | 必须 |
| 涉及版本兼容、迁移、错误码、分页、过滤、幂等、鉴权响应或消费者文档 | 必须 |
| 修复会影响调用方行为或示例用法 | 必须 |
| 纯内部实现且不改变任何公开输入/输出/错误/类型 | N/A + skipReason |
核心门禁
| Gate | 要求 | 证据 |
|---|---|---|
ApiContractArchitectureGate | 公开契约必须有消费者、输入、输出、错误、兼容和验证矩阵 | consumerSurface、contractInventory |
ConsumerSurfaceGate | 先列真实消费者，避免首个实现反向定义公共契约 | README、types、examples、route、SDK |
ErrorModelGate | 错误结构、错误码、detail 和恢复路径必须稳定 | errorModel、docs |
CliJsonContractGate | 机器可读 CLI 必须冻结 envelope 字段、成功/失败互斥、错误码、nextStep 与 native exit code | DevCodexCliEnvelopeV1、spawn fixtures |
VersionCompatibilityGate | 兼容、弃用、迁移和 breaking change 必须明确 | versionCompatibility |
ReleaseAuthorityBeforeCompatibilityGate | 先证明契约是否已发布并形成稳定消费者，再决定兼容、迁移或直接收敛 | publishedState、consumerEvidence、authoritySources、decision |
ConfigurationErgonomicsGate | 公开配置 Schema 必须证明最小任务、字段必要性、复杂度预算和可选字段省略行为 | MinimalTaskConfig、FieldNecessityMatrix、OptionalFieldOmissionProbe |
ContractVariantIsolationMutationGate | discriminated union/tool/event/state 合同必须拒绝 sibling variant 字段，并验证完成态必需证据不能被删除或反转 | ContractVariantIsolationMatrix、CompletionEvidenceDeletionMatrix |
IdempotencyPaginationGate | 写操作、分页、过滤、排序和重试场景必须定义语义 | idempotencyPagination |
执行步骤
- 列出所有消费者：前端、SDK、CLI、Hook、文档示例、测试、外部系统。
- 冻结现状契约：字段、类型、错误、版本、默认值、边界条件。
- 执行
ReleaseAuthorityBeforeCompatibilityGate：核对 tag/registry/release note/public docs/实际消费者；已发布才进入兼容评估，未发布且无稳定消费者默认直接收敛，未发布但存在产品取舍则交用户决策，事实不明时不得编造兼容义务。 - 定义目标契约与兼容策略：新增、保留、弃用、迁移、拒绝。
- 为错误模型、分页过滤、幂等和重试写稳定语义；CLI JSON 合同还要冻结 success/failure 字段互斥和 exit=0/1/2 映射。
- 若合同存在 discriminator 或条件完成态，执行 cross-variant 字段注入与完成证据删除/反转 mutation；Schema、semantic validator、docs field set 与 runtime 必须给出同一结论。
- 把契约映射到文档、示例、
.http/.cjs、types、runtime probe。
输出字段
## ApiContractArchitectureGate
| 字段 | 内容 |
|------|------|
| consumerSurface | 消费者列表和调用入口 |
| contractInventory | 当前/目标输入、输出、错误、类型、配置 |
| versionCompatibility | 兼容、弃用、迁移、breaking change |
| releaseAuthority | publishedState、consumerEvidence、authoritySources 与兼容决策 |
| errorModel | 错误码、detail、恢复路径 |
| cliJsonContract | envelope、字段互斥、错误码、nextStep、exit map 与默认人读兼容 |
| idempotencyPagination | 幂等、分页、过滤、排序、重试语义 |
| sdkDocsImpact | SDK、README、examples、public types、文档影响 |
| evidenceMatrix | 判断 -> 代码 / 类型 / 文档 / 测试 / 运行时证据 |
| contractMutationMatrix | variant isolation、completion evidence deletion/reversal、schema/semantic/docs/runtime 结论 |反模式
| 反模式 | 修正 |
|---|---|
| 先写实现，再让消费者适配输出 | 先冻结 contractInventory 和 consumerSurface |
| 只写 happy path，没有错误模型 | 补 errorModel 和失败恢复 |
| 首个 provider 字段反向定义公共 API | 区分业务契约与 provider payload |
| 用单个示例证明兼容 | 抽样 public types、README、tests 和 runtime |
| 未发布候选也默认背负历史兼容层 | 先做 ReleaseAuthorityBeforeCompatibilityGate；无稳定消费者时直接收敛 canonical contract |
| JSON 错误只写 message 或以 exit 0 返回 | 冻结稳定 errorCode/nextStep，并用原生退出码区分合同错误与检查失败 |
与其他 Skill 的关系
developer-experience-architecture：API 示例、错误信息和迁移路径共同影响 DX。backend-domain-architecture：领域不变量和权限策略必须映射到 API 契约。test-router：API 变更触发.http/.cjs、types、runtime 或 docs sync 验证。
© devcodex-labs, AGPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in content/skills/api-contract-architecture of devcodex-labs/devcodex.
- SKILL.md
- intent.json
Open the folder on GitHubat commit 1dd4525
Compare with similar skills
API Contract Architecture next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| API Contract Architecture this skilldevcodex-labs/devcodex | 439 | — | ~865 | Automated safety check: Pass | AGPL-3.0 | |
| API DesignerJeffallan/claude-skills | 12k | 2 repos | ~2k | Automated safety check: Pass | MIT | |
| Nodejs Backend Patternsever-works/ever-works | 158 | 17 repos | ~4k | Automated safety check: Pass | AGPL-3.0 | |
| Pangolin CRUD Endpointsfosrl/pangolin | 23k | — | ~461 | Automated safety check: Pass | Custom licence | |
| Backend PatternshellangleZ/burn-in-cceverywhere-ralph | 112 | 17 repos | ~3.3k | Automated safety check: Pass | None | |
| API And Interface Designdzhalaevd/Donatello | 135 | 9 repos | ~2.6k | Automated safety check: Pass | Apache-2.0 |
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Questions about API Contract Architecture
What does API Contract Architecture do?
API 契约架构专家 Owner — 当任务涉及 public API、HTTP/SDK/CLI 契约、版本兼容、错误模型、分页过滤、幂等、Schema、类型、迁移或消费者影响时使用；要求先冻结消费者契约，再设计实现与验证。. API Contract Architecture is an agent skill from devcodex-labs/devcodex.
When should I use API Contract Architecture?
API Contract Architecture fits situations like: tasks that involve API design.
How do I install API Contract Architecture in Claude Code?
Run `npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a claude-code`. Or copy the skill folder (content/skills/api-contract-architecture in devcodex-labs/devcodex) into .claude/skills/api-contract-architecture in your project. Claude Code loads it when a task matches its description.
How do I install API Contract Architecture in Codex?
Run `npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a codex`. Or copy the skill folder (content/skills/api-contract-architecture in devcodex-labs/devcodex) into .agents/skills/api-contract-architecture in your project. Codex loads it when a task matches its description.
Can I use API Contract Architecture in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add devcodex-labs/devcodex --skill api-contract-architecture -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/api-contract-architecture, .gemini/skills/api-contract-architecture, .github/skills/api-contract-architecture and .opencode/skills/api-contract-architecture in your project.
What does API Contract Architecture need to run?
SKILL.md names no scripts, command-line tools or credentials: API Contract Architecture is instructions for the agent only.
Does API Contract Architecture access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is API Contract Architecture safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does API Contract Architecture use?
API Contract Architecture is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does API Contract Architecture use?
About 865 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to API Contract Architecture?
Skills that share tags, products or a category with API Contract Architecture: API Designer (Jeffallan/claude-skills, 12k stars), Nodejs Backend Patterns (ever-works/ever-works, 158 stars), Pangolin CRUD Endpoints (fosrl/pangolin, 23k stars) and Backend Patterns (hellangleZ/burn-in-cceverywhere-ralph, 112 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains API Contract Architecture?
devcodex-labs (a GitHub organization) maintains it in devcodex-labs/devcodex, which has 439 GitHub stars. The repository holds 70 skills in this directory. The repository was last updated on September 17, 2026.
Source: devcodex-labs/devcodex on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.