Evaluate expressions and invoke operations in a live Composer app via the loopback debug port.
npx skills add https://github.com/dxos/dxos --skill composer-debug
Please help me install this Agent Skill. Skill: composer-debug Source: https://github.com/dxos/dxos/tree/main/.agents/skills/composer-debug Command: npx skills add https://github.com/dxos/dxos --skill composer-debug
Debugging a running Composer app normally means asking the user to paste console output or screenshots back and forth. This Skill lets the agent evaluate JavaScript directly inside the user's live Composer tab through a user-activated loopback debug port, so a wrong probe costs a retry instead of a round trip.
dxos devtools hook and composer app-framework namespace, with JSON-serialized results returned to the agent.Ask the user to open Settings, enable the Agent debug port, and share the session id so you can evaluate a read-only status snippet against their live Composer client.
High-intent search queries and answers about installing and using this skill.
Ask the user to enable the Agent debug port in Settings under Debug and copy the session id. Then run the composer-recovery.js script with that id and a JavaScript snippet; the script delivers the snippet to the page and prints the JSON result.
Call composer.plugins() for id, enabled, and active state, and composer.operations() for invocable operation keys with input and output fields. Both run as snippets through the debug port once React has mounted the composer namespace.
composer-debug targets the running app: the live client, plugins, and operations. composer-forensics covers the safe-mode /recovery.html port and storage-level work like export, import, SQLite, and Automerge compaction. Both share the same wire protocol and script.
A page reload stops the port because a fresh session id is minted per activation and nothing is persisted. Ask the user for a new session id rather than retrying the old one, and raise COMPOSER_RECOVERY_CONNECT_TIMEOUT if the tab polls slowly.
Only with explicit user confirmation for that specific action. The skill is read-only by default, and operations like dxos.reset(), compactDocuments, or imports must never run without consent. Database-backed operations also need a spaceId passed through the operation invoker.
Operations declaring Database.Service need a spaceId that composer.invoke does not pass. Resolve the operation definition through the plugin manager's capabilities and call the operation invoker directly with an explicit spaceId option.
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