# Catch silent agent regressions by diffing outputs and tool traces in CI with eval-view

> Snapshot agent behavior, compare outputs and tool-call paths, and block releases when a model or prompt change quietly shifts behavior.

- Skill: `agentskillexchange/catch-silent-agent-regressions-by-diffing-outputs-and-tool-t` (Agent Skill)
- Install (CLI): `npx skillmds@latest add agentskillexchange/catch-silent-agent-regressions-by-diffing-outputs-and-tool-t`
- Raw SKILL.md: https://api.skillmd.com/api/skills/agentskillexchange/catch-silent-agent-regressions-by-diffing-outputs-and-tool-t/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: agentskillexchange (https://skillmd.com/u/agentskillexchange)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/agentskillexchange/catch-silent-agent-regressions-by-diffing-outputs-and-tool-t

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# Catch silent agent regressions by diffing outputs and tool traces in CI with eval-view

Snapshot agent behavior, compare outputs and tool-call paths, and block releases when a model or prompt change quietly shifts behavior.

## Prerequisites

Python environment, eval-view installation, repeatable agent scenarios or tests, CI runner or local shell, supported agent stack under test

## Installation

Basic usage or getting-started notes:
- **The loop closes:** detection → investigation → graded verdict → quarantine governance → broadcast. You wake up, run progress, triage with drift, confirm with check --statistical, and the team sees the digest before...
- | 📉 **DRIFTING** | Trend sliding with graded confidence (low/med/high) | Run evalview drift <test> |
- | 🔎 **INVESTIGATE** | Verdict layer wants statistical replay | Run evalview check --statistical 5 |

- Source: https://github.com/hidai25/eval-view
- Extracted from upstream docs: https://raw.githubusercontent.com/hidai25/eval-view/HEAD/README.md

## Documentation

- https://github.com/hidai25/eval-view

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/catch-silent-agent-regressions-by-diffing-outputs-and-tool-traces-in-ci-with-eval-view/)