migration-guide

migration-guide is a skill for Claude Code, Codex from omnigent-ai/omnigent. It costs 50 tokens per session (453 once invoked), scanned A, original, Apache-2.0.

A guide for moving from an old software version to a new one after a breaking change, such as a renamed API, removed option, changed default, or relocated module. It explains the exact old and new code shapes with before-and-after examples.

In plain words
What is it for?
Use it to write upgrade instructions for API changes, command-line flag changes, default-value changes, or moved modules.
Why use it?
It turns an upgrade that might break existing code into specific, checkable edits. It also shows whether a temporary compatibility option or deprecation period exists.

Skill for Claude CodeCodex

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/omnigent-ai/omnigent/migration-guide
Any agent
npx skills add omnigent-ai/omnigent --skill migration-guide
Clone the repo
git clone --depth 1 https://github.com/omnigent-ai/omnigent

Made for: Claude Code, Codex.

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 migration-guide

README.md
[![agentmods](https://agentmods.dev/badge/skills/omnigent-ai/omnigent/migration-guide.svg)](https://agentmods.dev/skills/omnigent-ai/omnigent/migration-guide)
Your own site
<a href="https://agentmods.dev/skills/omnigent-ai/omnigent/migration-guide"><img src="https://agentmods.dev/badge/skills/omnigent-ai/omnigent/migration-guide.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 453 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 $0.00050 $0.00453
Opus 5 $0.00025 $0.00227
Sonnet 5 $0.00010 $0.00091
Haiku 4.5 $0.00005 $0.00045

Measured 4d ago against content hash 5004d72afa38, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

migration-guide 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 4d 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.

examples/scribe/skills/migration-guide/SKILL.md · 60 lines

What it actually says

migration-guide — write upgrade steps for a breaking change

Produce a guide that lets a user on the old version land on the new one with the least friction.

Pin down what actually broke

Identify the precise breaking change before writing a word. Get it from the diff and history, not from the description alone:

  • git diff <old>..<new> on the affected surface, and gh pr view <n> for the PR that introduced it.
  • Dispatch the researcher (purpose: explore) to confirm the exact old and new shapes: the old name/signature/default, the new one, and whether a compatibility shim or deprecation window exists.

Never document a rename or signature change from memory — the exact symbols are what users will copy.

Structure

# Migrating to <version>

## What changed
<one paragraph: the change and why, in user terms>

## Upgrade steps
1. <ordered, mechanical steps>

## Before / after
```
# before
...
# after
...
```

## If you can't upgrade yet
<deprecation window, shim, or flag to opt out — if one exists>

Write the steps

  • Make each step mechanical and verifiable ("rename --foo to --bar", not "update your flags"). A user should be able to follow it without rereading the whole guide.
  • Show a minimal, real before/after for each distinct change. Keep examples copy-pasteable.
  • State explicitly when there is no automated path and a manual edit is required.

Verify

Route the finished guide through the reviewer (purpose: review). Migration guides are acted on directly, so a wrong flag name or step is high-cost — the cross-vendor fact-check is worth it here.

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. 4d ago First seen · 60 lines · 50 tokens per session scan A 5004d72afa38

Subscribe to this mod's changes

migration-guide is a skill published in the GitHub repository omnigent-ai/omnigent (9,658 stars, last pushed today), licensed Apache-2.0. It adds 50 tokens to every session and 453 once invoked, about $0.0003 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.