migrate

A migration-planning method that compares several ways to move from an old system to a new one. Each option tests its riskiest step, then the results are compared for rollback safety, data correctness, downtime, and coordination effort.

In plain words
What is it for?
Use it with a migration plan or description of an old system and its replacement. It helps evaluate transition strategies before carrying out the full migration.
Why use it?
A migration is the process of changing systems or moving data, and the route can introduce different risks even when the final result is the same. Comparing approaches early helps identify a safer transition path.

Skill for Claude CodeCodex

Part of the agent-workflows plugin — 28 skills, 4 agents, 4 hooks shipped together

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 skills/sjarmak/agent-workflows/migrate
Any agent
npx skills add sjarmak/agent-workflows --skill migrate
Clone the repo
git clone --depth 1 https://github.com/sjarmak/agent-workflows

Made for: Claude Code, Codex.

Or install agent-workflows, the plugin that ships this one along with the rest of its 28 skills, 4 agents, 4 hooks.

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,591 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 $0.00000 $0.02591
Opus 5 $0.00000 $0.01295
Sonnet 5 $0.00000 $0.00518
Haiku 4.5 $0.00000 $0.00259

Measured 3d ago against content hash 8149d238fcc3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

migrate 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.

skills/migrate/SKILL.md · 198 lines

How it starts

The opening of the file, as written. The whole thing — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Parallel Strategy for System Transitions. Spawns N independent agents in isolated worktrees, each implementing a DIFFERENT migration strategy for the same old-system-to-new-system transition. The path is the variable, not the destination — all agents implement the same end state but via different transition paths. Each agent prototypes the critical path (the riskiest step) of their strategy, not the full migration. A lead agent then synthesizes all strategies into a comparison across rollback safety, data integrity, downtime, and coordination cost.

Arguments

$ARGUMENTS — format: [N] [path/to/migration_plan.md or inline description of old → new] where N is optional (default: 4, min 2, max 6)

Parse Arguments

Extract:

  • agent_count: optional leading integer (default 4, min 2, max 6)
  • migration_input: a file path to a migration plan, design doc, or architecture doc — or an inline description of the old system and new system

If the migration input is missing or unclear, ask the user to clarify. At minimum you need: what is the old system, what is the new system, and what direction the migration goes.

Phase 1: Understand the Migration

If a file path is given: read it and extract the migration context.

If inline: parse the description.

Prepare a migration brief that includes:

  • Old system — what exists today, its architecture, data stores, interfaces
  • New system — what the target state looks like
  • State to preserve — data, configurations, user sessions, external contracts, SLAs that must survive the transition
  • Constraints — downtime budget (zero? maintenance window?), team size, rollback requirements, compliance needs
  • Integration surface — what external systems depend on the old system (APIs, message queues, cron jobs, downstream consumers)
  • Data characteristics — volume, velocity, schema differences between old and new
  • Critical invariants — things that must NEVER break during migration (e.g., "no duplicate transactions", "no lost orders", "auth must never be down")

Read the full file on GitHub · 198 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 · 198 lines · 0 tokens per session scan A 8149d238fcc3

Subscribe to this mod's changes

migrate is a skill published in the GitHub repository sjarmak/agent-workflows (9 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,591 tokens. 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 2026-08-31.

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