LuaRocks

AXM reads Lua extension metadata from an agent-extensions.json sidecar shipped at the rock root inside the installed rock. This is the two-way linking model applied to the LuaRocks ecosystem.

Add an agent-extensions.json file with an agentExtensions array. Each entry is an extension reference (@owner/<type>/<name>):

// agent-extensions.json
{
  "$schema": "https://axm.sh/schemas/agent-extensions.schema.json",
  "agentExtensions": [{ "ref": "@examples/packs/lua-luarocks-tinyflags" }],
}

Ship the sidecar as package data in the rock root. For a builtin rockspec, add an install mapping:

-- agentxm-example-tinyflags-0.1.0-1.rockspec
build = {
  type = "builtin",
  install = {
    conf = { ["agent-extensions.json"] = "agent-extensions.json" },
  },
}

Keep recommendations identity-only — omit versionRange. AXM resolves the reference to the newest matching extension version and pins it in the user's axm.lock. Prefer recommending a single pack so you keep one stable reference while its contents evolve.

Add a semver versionRange only when your rock genuinely pairs with a bounded major line of the extension:

{
  "agentExtensions": [
    {
      "ref": "@examples/packs/lua-luarocks-tinyflags",
      "versionRange": "^1.0.0",
    },
  ],
}

On the extension manifest (skill.json, pack.json, subagent.json, …), add a packages array with a LuaRocks purl. Use the rock name as the purl name:

// pack.json
{
  "packages": [{ "purl": "pkg:luarocks/agentxm-example-tinyflags" }],
}

Default to identity-only. Add a VERS versionRange with the luarocks scheme only when the extension depends on rock APIs introduced or removed in a known range:

{
  "packages": [
    {
      "purl": "pkg:luarocks/agentxm-example-tinyflags",
      "versionRange": "vers:luarocks/>=0.1.0|<1.0.0",
    },
  ],
}

When the rock recommends an extension through the AgentXM Registry and that extension names the rock as a companion via its purl, AXM derives official status for the pair — no extra flag. See Official extensions.

The lua-luarocks-lib and lua-luarocks-app directories in polyglot-examples are the working fixtures for everything above. The rock publishes a TinyFlags companion pack and recommends it from the agent-extensions.json sidecar at the rock root; the pack and each skill declare the rock's pkg:luarocks purl as an identity-only companion package.