Repro API

by emdash-cms

Repro API is a Quality skill for Claude Code, published by emdash-cms in emdash.

11.6K stars1.1K forkson emdash-cms/emdashAdded 2026/08/12Repository updated 2026/08/11

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astrocmsemdashtypescript

Install in seconds

Install Repro API

Copy Repro API into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/emdash-cms/emdash/tree/main/infra/emdash-bot/.flue/skills/repro-api ~/.claude/skills/repro-api

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/emdash-cms/emdash.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: infra/emdash-bot/.flue/skills/repro-api/SKILL.md in emdash-cms/emdash
Installs to: ~/.claude/skills/repro-api
Collection: One of 25 skills cataloged from this repository
Category: Quality — 1354 skills

What Repro API does

Repro API reproduces EmDash bugs in REST handlers, CLI, MCP, migrations, schema registry, or build tooling without using the browser. It is used to create a deterministic failing test or command transcript for backend issues.

Repro API is cataloged under Quality on DirSkills. Repro API comes from a repository tagged astro, cms, emdash and typescript.

Documentation

README

Excerpt

Reproduce: API / CLI / Migration / Build

The bug does not need a browser. It lives in a handler, the CLI, the MCP server, a migration, the schema registry, or the build pipeline. Your goal is a deterministic reproduction you can put in the comment as evidence -- ideally a failing vitest test that becomes the regression fixture once fixed.

Environment

Read and search in the VFS. Use read_file, ls, grep, and code to find the package, read the handler in full, and trace call sites. This is most of the work and none of it needs a container.
Attach a container only to run the project. pnpm install, pnpm build, and vitest do not exist in the isolate. When you are ready to actually execute a reproduction, attach a container and run those there.

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Repro API

What else does emdash-cms publish alongside Repro API?
Repro API is one of 25 skills that DirSkills catalogs from emdash-cms/emdash, the repository it ships in. Its siblings there include API & CLI Bug Reproduction, Adversarial Code Reviewer and Agent Browser. Each one is a separate skill with its own page in this directory, installs the same way Repro API does, and is maintained by emdash-cms in that same repository. The rest of the collection is listed on the emdash-cms/emdash page.
How does Repro API compare to other Quality skills?
Repro API ranks #182 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Repro API against them. Open each page to compare what they document and how they install.