create

Create a custom auto-develop skill for a specific feature in the application. Analyzes the feature, interviews the user to discover and curate new capabilities, builds a capability specification, instruments code if needed, and generates a complete auto-develop skill that iteratively implements new functionality.

The feature to develop: $ARGUMENTS

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Overview

This skill creates two files:

1. A capability specification (.claude/commands/spec-{feature}.md) — the enumerated list of new capabilities to implement
2. An auto-develop skill (.claude/commands/auto-develop-{feature}.md) — the iterative development loop

It does this through a structured process that minimizes back-and-forth — all user input is gathered in a single round after initial analysis.

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Phase 0: App & Stack Detection

Before analyzing the feature, discover the project's technology stack and app type. This "stack profile" informs all later phases.

0a: Language & Build System

Scan the project root for manifest files and infer the stack:

Manifest File	Language/Ecosystem
package.json	Node.js / TypeScript / JavaScript
pyproject.toml, setup.py, requirements.txt	Python
go.mod	Go
Cargo.toml	Rust
Gemfile	Ruby
build.gradle, pom.xml	Java / Kotlin
Makefile (alone)	C / C++ / generic
mix.exs	Elixir
Package.swift	Swift
*.csproj, *.sln	C# / .NET

Also detect:

• Package manager: npm/yarn/pnpm, pip/poetry/uv, cargo, go modules, bundler, maven/gradle, etc.
• Framework: Next.js, Django, Flask, FastAPI, Rails, Gin, Actix, Spring Boot, Phoenix, etc.
• Test runner: vitest/jest/mocha, pytest, go test, cargo test, rspec, junit, etc.
• Linter/type checker: eslint/tsc, ruff/mypy/pylint, go vet, cargo clippy, rubocop, etc.
• Build command: npm run build, python -m build, go build, cargo build, make, etc.

0b: App Type Classification

Based on the code structure, classify the app type: