# Strict API (agent skill)

> Strict API is an agent skill (a SKILL.md file) from alirezarezvani/claude-skills. Agents load it when the user says 'no hallucinations', 'verify APIs' or 'don't invent functions', or code depends on a library version you have… It works with Claude Code, Codex, Cursor, Gemini CLI and OpenCode and has 29,437 GitHub stars across a repository of 6 listed skills.

Use when the user says 'no hallucinations', 'verify APIs' or 'don't invent functions', or code depends on a library version you have not checked. Requires proof that every method, import and variable exists in the installed version before using it. Inventing a function that doesn't exist is the opposite of efficiency. You wrote a line that looks minimal. You shipped a bug that takes an hour to debug. The true minimal path is: use only what is provably there.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/alirezarezvani/claude-skills |
| Skill path | engineering/strict-api/SKILL.md |
| Skill name | strict-api |
| GitHub stars | 29,437 |
| Installs on skills.sh | not listed |
| License | MIT |
| Skills in repo | 6 |
| Plugin marketplace | claude-code-skills |
| Official | no |
| Works with | Claude Code, Codex, Cursor, Gemini CLI, OpenCode |
| Category | Coding |
| Last commit | Nov 5, 2026 |

## When it triggers

- Use when the user says 'no hallucinations', 'verify APIs' or 'don't invent functions', or code depends on a library version you have not checked.

## Add this skill

### Claude Code

```sh
/plugin marketplace add alirezarezvani/claude-skills
/plugin install engineering-advanced-skills@claude-code-skills
```

In the Claude apps, zip the skill folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

### ChatGPT / Codex

```sh
git clone --depth 1 https://github.com/alirezarezvani/claude-skills.git
cp -r claude-skills/engineering/strict-api .agents/skills/strict-api   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/alirezarezvani/claude-skills.git
cp -r claude-skills/engineering/strict-api .cursor/skills/strict-api   # project; ~/.cursor/skills for all projects
```

Sources (checked 2026-10-07): https://code.claude.com/docs/en/skills, https://support.claude.com/en/articles/12512180-using-skills-in-claude, https://learn.chatgpt.com/docs/build-skills, https://cursor.com/docs/context/skills

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Canonical page: https://appsgit.com/skills/alirezarezvani-strict-api
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