Format Capabilities API

The format capabilities API provides information about what features each AI editor format supports. Use this to determine compatibility when converting packages between formats.

Get All Format Capabilities

GET /api/v1/formats/capabilities

Returns the complete format capabilities matrix. Example Response:

{
  "version": "1.0.2",
  "description": "Format capability matrix for PRPM converters",
  "formats": {
    "cursor": {
      "name": "Cursor",
      "supportsSkills": false,
      "supportsPlugins": true,
      "supportsExtensions": false,
      "supportsAgents": false,
      "supportsAgentsMd": true,
      "supportsSlashCommands": true,
      "markdownFallback": "cursor-rules.md",
      "notes": "Cursor supports plugins (.cursor-plugin/plugin.json) that bundle rules, skills, agents, commands, hooks, and MCP servers..."
    },
    "claude": {
      "name": "Claude Code",
      "supportsSkills": true,
      "supportsPlugins": true,
      "supportsExtensions": false,
      "supportsAgents": true,
      "supportsAgentsMd": false,
      "markdownFallback": "CLAUDE.md",
      "notes": "Claude Code supports skills, agents, and plugins..."
    },
    "kiro": {
      "name": "Kiro AI",
      "supportsSkills": false,
      "supportsPlugins": false,
      "supportsExtensions": false,
      "supportsAgents": true,
      "supportsAgentsMd": true,
      "markdownFallback": "kiro-agent.md",
      "notes": "Kiro supports agents in .kiro/agents/ directory..."
    }
  },
  "agentsMdSupport": {
    "description": "Formats that support agents.md for progressive disclosure",
    "formats": ["cursor", "copilot", "kiro", "opencode", "ruler", "droid", "replit", "zed"],
    "notes": "These formats can use AGENTS.md as a universal fallback..."
  }
}

Get Specific Format Capabilities

GET /api/v1/formats/capabilities/:format

Returns capabilities for a single format. Path Parameters:

Parameter	Type	Description
`format`	string	Format name (e.g., `cursor`, `claude`, `kiro`)

Example Request:

curl https://registry.prpm.dev/api/v1/formats/capabilities/kiro

Example Response:

{
  "format": "kiro",
  "name": "Kiro AI",
  "supportsSkills": false,
  "supportsPlugins": false,
  "supportsExtensions": false,
  "supportsAgents": true,
  "supportsAgentsMd": true,
  "markdownFallback": "kiro-agent.md",
  "notes": "Kiro supports agents in .kiro/agents/ directory. Full agents.md support."
}

404 Response (format not found):

{
  "error": "Format not found",
  "message": "Format \"invalid\" does not exist in the capabilities matrix",
  "availableFormats": ["cursor", "claude", "continue", "windsurf", "copilot", "kiro", ...]
}

Capability Fields

Field	Type	Description
`name`	string	Human-readable format name
`supportsSkills`	boolean	Can use skill packages
`supportsPlugins`	boolean	Can use plugin packages
`supportsExtensions`	boolean	Can use extension packages
`supportsAgents`	boolean	Has native agent support
`supportsAgentsMd`	boolean	Reads AGENTS.md files
`supportsSlashCommands`	boolean	Has custom slash commands
`markdownFallback`	string	Fallback filename for unsupported features
`notes`	string	Additional capability notes

Progressive Disclosure

When a target format doesn’t support a specific feature (e.g., skills), PRPM uses progressive disclosure to convert to the best available alternative:

Native format - Use if supported
Format-specific markdown - e.g., CLAUDE.md, GEMINI.md
Universal fallback - AGENTS.md for maximum compatibility

Use the capabilities API to determine the best conversion strategy for your packages.

Example: Check Agents.md Support

const response = await fetch('https://registry.prpm.dev/api/v1/formats/capabilities');
const { agentsMdSupport } = await response.json();

// Check if a format supports agents.md
const supportsAgentsMd = agentsMdSupport.formats.includes('cursor');
console.log(`Cursor supports agents.md: ${supportsAgentsMd}`); // true

Available Formats

Format	Key	Supports Agents.md
Cursor	`cursor`	Yes
Claude Code	`claude`	No (uses CLAUDE.md)
Continue	`continue`	No
Windsurf	`windsurf`	No
GitHub Copilot	`copilot`	Yes
Kiro AI	`kiro`	Yes
Gemini CLI	`gemini`	No (uses GEMINI.md)
OpenCode	`opencode`	Yes
Ruler	`ruler`	Yes
Factory Droid	`droid`	Yes
Trae	`trae`	No
Aider	`aider`	No (uses CONVENTIONS.md)
Zencoder	`zencoder`	No
Replit Agent	`replit`	Yes
Zed	`zed`	Yes

API Reference

Documentation Index

​Format Capabilities API

​Get All Format Capabilities

​Get Specific Format Capabilities

​Capability Fields

​Progressive Disclosure

​Example: Check Agents.md Support

​Available Formats