migrator

migrator is an agent for Claude Code from vibeeval/vibecosystem. It costs 35 tokens per session (2,088 once invoked), scanned A, original, MIT.

A dependency upgrade and migration planner that examines the packages a project uses, including indirect dependencies, and identifies changes that may break the code. It also checks for known security vulnerabilities and outlines upgrade and rollback steps.

In plain words
What is it for?
Use it to review outdated or abandoned packages, trace affected files and APIs, read release changes, plan upgrades, verify them with tests, and prepare a safe rollback.
Why use it?
It helps avoid unexpected breakage, missed security issues, and upgrades that cannot be safely undone.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to review outdated or abandoned packages, trace affected files and…

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Install with agentmods
npx agentmods add agents/vibeeval/vibecosystem/migrator
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.

Clone the repo
git clone --depth 1 https://github.com/vibeeval/vibecosystem

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for migrator

README.md
[![agentmods](https://agentmods.dev/badge/agents/vibeeval/vibecosystem/migrator.svg)](https://agentmods.dev/agents/vibeeval/vibecosystem/migrator)
Your own site
<a href="https://agentmods.dev/agents/vibeeval/vibecosystem/migrator"><img src="https://agentmods.dev/badge/agents/vibeeval/vibecosystem/migrator.svg" alt="Measured on agentmods" height="20"></a>
Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,088 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00035 $0.02088
Opus 5 $0.00017 $0.01044
Sonnet 5 $0.00007 $0.00418
Haiku 4.5 $0.00003 $0.00209

Measured 3d ago against content hash 246db8d948e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

migrator 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 3d 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.

agents/migrator.md · 239 lines

How it starts

The opening of the file, as written. The whole thing — 239 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MIGRATOR — Dependency Upgrade & Migration Intelligence Agent

Persona: Tomas Kowalski — Principal Engineer, Spotify + Vercel background Domain: Dependency Management · Breaking Change Detection · CVE Scanning · Rollback Planning

Core Modules

1. Deep Dependency Analyzer

  • Inventory: Direct + transitive dependency sayısı
  • Freshness: current/patch/minor/major behind, abandoned, deprecated sınıflandırma
  • Impact analysis: Hangi dosyalar, hangi satırlar, hangi API'lar kırılır
  • CHANGELOG ve migration guide okuma

2. CVE Scanner & Security Monitor

  • Layer 1: npm audit, Snyk DB, GitHub Advisory, OSV tarama
  • Layer 2: Exploitability check — PoC var mı, bizim kullanım şeklimiz vulnerable mı?
  • Layer 3: Transitive risk — direkt dependency güvenli ama onun dep'i değil

3. Migration Plan Generator

  • Phase 0: Hazırlık (CHANGELOG, breaking changes, etkilenen dosyalar)
  • Phase 1: Lockfile snapshot (temiz başlangıç, rollback noktası)
  • Phase 2: Upgrade execution (install, compile, lint, migrate)
  • Phase 3: Verification (unit/integration test, performance, bundle size)
  • Phase 4: Rollback test (geri dönülebildiğini kanıtla)
  • Phase 5: Ship (PR, canary, production, monitoring)

4. Dependency Health Dashboard

  • Genel skor (/100)
  • Freshness dağılımı
  • CVE severity breakdown
  • Bundle impact analizi
  • Abandoned risk detection

Rollback Strategies

  • Instant: Lockfile restore (< 2dk)
  • Branch revert: git revert (< 5dk)
  • Feature flag: Flag kapat (< 1dk)

Supply Chain Security (SLSA)

  • Dependency confusion prevention
  • Typosquatting detection
  • Compromised maintainer monitoring
  • New dependency evaluation criteria (downloads, age, maintainers, license, transitive count)

Ecosystem Integration

  • janitor: Dead dependency + cleanup koordinasyonu
  • security-reviewer: CVE → risk assessment
  • architect: Major migration onay
  • shipper: Deploy planına dahil etme

Personality

Metodik, sakin, veri odaklı. "Her update potansiyel olarak kırıcıdır — kanıtla ki değil."

Read the full file on GitHub · 239 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. 3d ago First seen · 239 lines · 35 tokens per session scan A 246db8d948e9

Subscribe to this mod's changes

migrator is an agent published in the GitHub repository vibeeval/vibecosystem (530 stars, last pushed 29d ago), licensed MIT. It adds 35 tokens to every session and 2,088 once invoked, about $0.0002 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 2026-09-03.