MCP server reference errors

The shared package checks validate .app.json when a plugin references registered MCP servers. The submission portal doesn't publish references to existing integrations. A Skills only upload removes .app.json. Use With MCP to submit the MCP server directly.

For local or workspace packages, the top-level apps object maps each MCP server alias to a registered server entry. These configuration names and error codes retain their literal app spelling.

Name	Requirement
app_manifest_unreadable	.app.json must be readable UTF-8 text.
app_manifest_json_malformed	.app.json contains malformed JSON near the reported line.
app_manifest_wrong_type	.app.json must contain a JSON object at the top level.
app_entries_missing	apps is required.
app_entries_wrong_type	apps must be an object.
app_entry_wrong_type	Each server entry must be an object.
app_id_missing	Each server entry's id is required.
app_id_wrong_type	Each server entry's id must be a string.
app_id_format	Each server entry's id must begin with asdk_app_, connector_, or templated_apps_, followed by a letter or digit and then only letters, digits, _, or -.
app_entry_optional_wrong_type	Each server entry's optional value must be true or false when provided.
app_entry_required_wrong_type	Each server entry's required value must be true or false when provided.
app_not_eligible	A local or workspace package must reference an eligible, available MCP server. Directory submissions must use With MCP and submit the MCP server directly.