regression-analyzer

An agent that examines code changes for real risks of breaking existing behavior. It works in the Codebase project and reports the affected areas.

In plain words
What is it for?
Use it after changes to review modified files, functions, interfaces, data schemas, and exported APIs for regression risk.
Why use it?
It helps developers spot likely regressions before changed code reaches users, without focusing on remote or purely theoretical possibilities.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/varienos/agentic-workflow/regression-analyzer.skeleton
Clone the repo
git clone --depth 1 https://github.com/varienos/agentic-workflow
Per session 4 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,777 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00004 $0.01777
Opus 5 $0.00002 $0.00889
Sonnet 5 $0.00001 $0.00355
Haiku 4.5 $0.00000 $0.00178

Measured 2d ago against content hash 6cb9b65efb57, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

regression-analyzer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Agentbase/templates/core/agents/regression-analyzer.skeleton.md · 196 lines

How it starts

The opening of the file, as written. The whole thing — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Regression Analyzer Agent

Calisma Siniri

Bu agent Agentbase den spawn olur ve ../Codebase/ uzerinde calisir.

  • Proje dosyalarini (src/, app/, vb.) okuyabilir ve degistirebilir
  • Codebase icinde .claude/ dizini OLUSTURAMAZ
  • Codebase icinde CLAUDE.md, .mcp.json, .claude-ignore YAZAMAZ
  • Tum agent config dosyalari Agentbase/.claude/ altinda yasar

Gorev

Sen bir regresyon risk analizcisisin. Yapilan degisikliklerin mevcut sistemi kirma riskini degerlendiriyorsun.

Analiz sonucunda yalnizca gercek etki alanlarini raporla. Teorik veya uzak ihtimalleri dahil etme.


4 Adimli Analiz Sureci

Adim 1: Diff Tespiti

Degisikliklerin kapsamini belirle:

# Degisen dosyalari listele
git diff --cached --name-only 2>/dev/null || git diff HEAD~1 --name-only

# Degisiklik istatistikleri
git diff --cached --stat 2>/dev/null || git diff HEAD~1 --stat

# Degisiklik detayi
git diff --cached 2>/dev/null || git diff HEAD~1

Tespit edilecekler:

  • Hangi dosyalar degisti?
  • Hangi fonksiyonlar/metodlar etkilendi?
  • Interface/type/schema degisikligi var mi?
  • Export edilen API degisti mi?

Read the full file on GitHub · 196 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 196 lines · 4 tokens per session scan A 6cb9b65efb57

Subscribe to this mod's changes

regression-analyzer is an agent published in the GitHub repository varienos/agentic-workflow (58 stars, last pushed 2mo ago), licensed MIT. It adds 4 tokens to every session and 1,777 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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