Judgmentlabs Judgeval Claude Plugin
- Updated July 13, 2026
- JudgmentLabs/judgeval-claude-plugin
judgmentlabs-judgeval-claude-plugin is a Claude Code plugin that enables Judgeval tracing, logging, and evaluation of assistant conversations and tool calls.
About
judgmentlabs-judgeval-claude-plugin is the official Claude Code CLI integration for Judgeval tracing and evaluation. Developers shipping agent-heavy products install it when they need automatic capture of assistant calls, messages, and responses instead of ad-hoc copy-paste logs. The marketplace listing spans two plugins with keywords for agents, observability, evaluation, logging, trace usage, scripts, and working-session capture—positioning it squarely in Ship testing with carryover into Operate monitoring when you watch quality drift. Use it while hardening skills, running evaluation examples, or proving correctness before you trust an agent path in production. Intermediate complexity reflects Judgeval account setup, API keys, and aligning trace semantics with your eval rubric. It complements agent skills rather than replacing them: you still author behavior in skills, but Judgeval supplies the measurement layer Claude Code lacks natively. Not a crash reporter or SEO tool—a focused eval and observability plugin for Claude Code sessions.
- Claude Code CLI plugin bundle (pluginCount: 2) for Judgeval tracing and observability
- Automatically captures assistant calls, messages, and responses for evaluation workflows
- Enables logging, trace usage, and correctness checks with helper scripts and examples
- Targets agents, evaluation, and observability—not generic app unit tests
- Works as a bridge between local Claude Code conversations and Judgeval evaluation tooling
Judgmentlabs Judgeval Claude Plugin by the numbers
- Data as of Jul 14, 2026 (Skillselion catalog sync)
/plugin install judgmentlabs-judgeval-claude-plugin@JudgmentLabs/judgeval-claude-pluginAdd your badge
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| Last updated | July 13, 2026 |
|---|---|
| Repository | JudgmentLabs/judgeval-claude-plugin ↗ |
What it does
Trace and evaluate Claude Code assistant calls with Judgeval logging so you can score conversations, usage, and correctness before shipping agent features.
Who is it for?
Best when you're shipping Claude Code agents and need structured tracing and evaluation (Judgeval) on real CLI sessions.
Skip if: Static app repos with no agent loop, or teams that refuse third-party observability on assistant traffic.
What you get
After install, Claude Code sessions feed Judgeval traces and eval hooks so you can measure usage, run examples, and check assistant correctness before release.
- Automatic Judgeval traces of Claude Code assistant calls and responses
- Evaluation-ready logs and scripts aligned with Judgeval workflows
- Observable usage and correctness signals across working agent sessions
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Judgeval tracing CLI plugin, not a general test runner or production error tracker.
FAQ
Who is Judgmentlabs Judgeval Claude Plugin for?
Developers using Claude Code who want Judgeval-backed tracing, logging, and evaluation on assistant messages, calls, and responses.
When should I use Judgmentlabs Judgeval Claude Plugin?
Use it during Ship testing (and ongoing Operate monitoring) when you need automatic trace capture and eval examples before trusting agent workflows.
How do I add Judgmentlabs Judgeval Claude Plugin to my agent?
Install the JudgmentLabs/judgeval-claude-plugin marketplace bundle in Claude Code, configure Judgeval credentials per the plugin README, and enable the tracing plugins so sessions log automatically.