doublecheck plugin
Three-layer verification pipeline for AI output. Extracts claims, finds sources, and flags hallucination risks so humans can verify before acting.
How to install the doublecheck plugin
Run both commands inside Claude Code. The first adds the marketplace once; the second installs the plugin.
/plugin marketplace add gbb-acelerators/awesome-harness-primitives
/plugin install doublecheck@copilot-primitives-claudeWhat's inside doublecheck
2 parts read from the plugin's own files.
Agents 1
Call as @agent-doublecheck:name- @agent-doublecheck:doublecheck
>-
Skills 1
Claude loads it when the task matches- doublecheck
No description in the file.
Using doublecheck in Claude Code
Ask for an agent by name:
@agent-doublecheck:doublecheckSkills need no command. Claude reads them when your request matches what they describe.
Update, turn off or remove
- Update the plugin (shell)
- claude plugin update doublecheck@copilot-primitives-claude
- Refresh the marketplace
- /plugin marketplace update copilot-primitives-claude
- Turn it off for now
- /plugin disable doublecheck@copilot-primitives-claude
- Remove it
- /plugin uninstall doublecheck@copilot-primitives-claude
doublecheck plugin questions
How do I install the doublecheck plugin?
In Claude Code run /plugin marketplace add gbb-acelerators/awesome-harness-primitives, then /plugin install doublecheck@copilot-primitives-claude.
What does the doublecheck plugin include?
doublecheck bundles 1 agent, 1 skill.
Which agents come with doublecheck?
doublecheck. Call one with @agent-doublecheck:doublecheck.
How do I update or remove the doublecheck plugin?
Update it with claude plugin update doublecheck@copilot-primitives-claude in your shell, or from the Installed tab of /plugin. Remove it with /plugin uninstall doublecheck@copilot-primitives-claude.
What license is the doublecheck plugin under?
MIT, as stated in the plugin's manifest.