Agent Starter installs project-local configuration for Codex, Claude Code, and Cursor.
It is not an orchestration framework. The core abstraction is agent.json: one declarative config that syncs into the native files each tool already understands.
npx create-agent-starter@3.0.0 --agent all
System
agent.jsondefines agents, skills, MCP profiles, rules, and project conventions- Native outputs target
.claude/,.codex/, and.cursor/ - Managed blocks preserve manual edits outside generated sections
- Credentials are referenced through environment interpolation, not written as literals
Runtime
npx create-agent-starterbootstraps a projectagent-starter syncrefreshes native config after edits- Profiles cover minimal, web, SaaS, and design-heavy projects
- Stack detection reads local package metadata before enabling defaults
Proof
- One config emits Claude Code settings, Codex TOML, and Cursor MCP/rule files
- Re-syncing is idempotent across supported agents
- MCP credentials stay outside repository files
- Backwards-compatible package alias is maintained for older installs