EvalGlass

Use cases

Use EvalGlass when your AI application changes.

Prompt edits, model switches, retriever updates, tool changes, and live traffic move your product in ways code review can’t see. Each moment below is a real question — ask your coding agent, and it turns the behavior into a project-specific check and a scorecard you can read.

When a new model or provider. Ask: “Evaluate my AI application after the model switch. Show what improved and what regressed.”

checksfaithfulness · answer quality · tool use · latency · cost · refusal · policy · edge cases. Deltas only when the two runs are comparable; the verdict stays informational until you approve a gate.

When a prompt changed. Ask: “Compare this prompt change against the last run. Did it improve the actual product behavior?”

checksanswer quality · faithfulness · failure clusters. “Improved” means a measured delta on the examples you supplied — not certification.

When live behavior feels different. Ask: “Inspect recent traces and tell me where behavior drifted from our expected checks.”

checkstrace-derived cases vs. expected behavior. Uses traces you have already exported — a comparison you run, or schedule as a one-shot with evalglass watch.

When a new agentic workflow ships. Ask: “Build checks for this new AI workflow before we release it.”

checksnew metrics and rubrics for the workflow; scenarios you author. Scaffolded checks land proposed · informational — they don’t gate until you review them.

When you have traces but no eval system. Ask: “Create evaluation cases from our traces and show the most common failure modes.”

checksimport of exported OpenTelemetry / OpenInference / local-JSON traces → authored cases. Live pulls from Langfuse / Phoenix / LangSmith are next.

When a release needs a gate. Ask: “Set up a CI gate for the checks we have reviewed and approved.”

checksa gate fires only after a deliberate host approval — there is no gate/approve/certify verb. A fresh run is informational and never fails the build.

When you need to show progress. Ask: “Create a scorecard summary I can share with the product lead.”

checksa readable summary of what was reviewed, improved, regressed, and still needs review. You can audit the evidence — it never claims your AI is “safe.”

When you ship a retrieval-augmented app. Ask: “Evaluate my RAG answers for faithfulness and grounding against my examples.”

checksretrieval faithfulness · answer quality · trace evidence — project-specific checks you author, not a packaged benchmark.

When your app uses tools across steps. Ask: “Evaluate my agent’s tool use and trajectories against my expected checks.”

checkstool selection · trajectories · outcomes from exported traces. Measured, never certified.

What it is not for

The human stays in control.

Your coding agent can run every step — but it can’t inflate what a score means. Generated and proposed cases stay provisional until you validate them, and nothing gates CI until you approve a threshold in your own config. How scorecards stay honest →

Find the moment closest to yours.

Evaluate my agentic app using EvalGlass.

Related

How it works
the six-step check loop
Learn
the mental models behind these moments
Scorecards
what each run hands back
Get the plugin
two commands in Claude Code
Docs
the detailed reference