Generates a static api_manifest.json from the library's descripex annotations.
The manifest is a JSON-serializable representation of every public function in the library — params, return types, errors, specs, and descriptions. Suitable for agent discovery, validators, and API generation.
mix mpp.manifest
mix mpp.manifest path/to/output.jsonUses MPP.__descripex_modules__/0 as the single source of truth for which
modules to include. Output defaults to api_manifest.json in the project root.