Migration, Rollout & Rollback Plan

Migration, Rollout & Rollback Plan is a skill for Claude Code, Codex from s977043/river-review. It costs 30 tokens per session (1,246 once invoked), scanned A, original, MIT.

A design review guide for planning how a software change is moved into production and, if needed, reversed. It covers compatibility between old and new versions, staged rollout, and rollback conditions.

In plain words
What is it for?
Use it for architecture documents, release plans, deployment changes, feature-flag rollouts, and rollback procedures.
Why use it?
It prevents teams from deploying changes without knowing how to migrate users or data and when to stop or revert.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Part of the river-review plugin — 138 skills, 18 commands, 5 agents, 3 hooks shipped together

Good fit Use it for architecture documents, release plans, deployment changes, feature-flag rollouts, and rollback procedures.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/s977043/river-review/migration-rollout-rollback
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.

Any agent
npx skills add s977043/river-review --skill migration-rollout-rollback
Clone the repo
git clone --depth 1 https://github.com/s977043/river-review

Made for: Claude Code, Codex.

Or install river-review, the plugin that ships this one along with the rest of its 138 skills, 18 commands, 5 agents, 3 hooks.

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, Rollout & Rollback Plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/s977043/river-review/migration-rollout-rollback/github.svg)](https://agentmods.dev/skills/s977043/river-review/migration-rollout-rollback)
Your own site
<a href="https://agentmods.dev/skills/s977043/river-review/migration-rollout-rollback"><img src="https://agentmods.dev/badge/skills/s977043/river-review/migration-rollout-rollback/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Migration, Rollout & Rollback Plan

Your own site · 80×15
<a href="https://agentmods.dev/skills/s977043/river-review/migration-rollout-rollback"><img src="https://agentmods.dev/badge/skills/s977043/river-review/migration-rollout-rollback.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,246 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 $0.00030 $0.01246
Opus 5 $0.00015 $0.00623
Sonnet 5 $0.00006 $0.00249
Haiku 4.5 $0.00003 $0.00125

Measured 7d ago against content hash c7d3b8fb9f9f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

Migration, Rollout & Rollback Plan 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 7d 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/upstream/migration-rollout-rollback/SKILL.md · 95 lines

What it actually says

Pattern declaration

Primary pattern: Reviewer Secondary patterns: Inversion Why: 設計変更の差分から移行計画・段階リリース・ロールバックの曖昧さをレビューし、ロールバック不能シナリオを逆照射する。

Goal / 目的

  • 仕様/設計変更の差分から、移行計画・段階リリース・ロールバックが曖昧なまま実装に入るリスクを減らす。

Non-goals / 扱わないこと

  • CI/CD や運用基盤の詳細設計そのもの(ただし “必要な前提” が抜けていれば指摘する)。
  • 実装レベルの最適化や手順の細部(設計として必要な骨子に絞る)。

Pre-execution Gate / 実行前ゲート

このスキルは以下の条件がすべて満たされない限りNO_REVIEWを返す。

  • 差分に設計ドキュメント・移行計画・ロールアウト/ロールバック・リリース・デプロイに関するファイルが含まれている
  • inputContextにdiffが含まれている

ゲート不成立時の出力: NO_REVIEW: migration-rollout-rollback — 移行/ロールアウト/ロールバックに関する差分がない

False-positive guards / 抑制条件

  • 影響範囲が明確に “実験/検証のみ・本番影響なし” と書かれている場合は、過度に厳しくしない。

Rule / ルール

  • まず「何が変わるか(互換性/データ/動作)と、移行の要否」を 1 行で要約する。
  • 指摘は最大 8 件まで。ロールバック不能・データ損失・互換性破壊につながるものを優先。
  • “追記案(手順テンプレ)” を最短で貼れる形で付ける。

Checklist / 観点チェックリスト

  • 互換性
    • 旧/新クライアント(API/スキーマ/設定)の両対応期間が必要か。
    • 破壊的変更なら、バージョニングや移行ガイドがあるか。
  • 段階移行
    • ステップ(準備→並行稼働→切替→清掃)が明示されているか。
    • Feature flag / 段階リリースの単位と切替条件があるか。
  • ロールバック
    • ロールバック条件(どのメトリクス/症状で戻すか)が明示されているか。
    • 戻したときの整合性(データ/互換性/二重書き込み)が説明されているか。
  • 観測性
    • リリース中に見るべきメトリクス、ログ、ダッシュボード、アラートがあるか。
    • 失敗時の切り分けに必要な相関IDなどが設計に含まれるか。

Output / 出力フォーマット

すべて日本語。<file>:<line>: <message> 形式で出力する。

  • 先頭に要約を 1 行: (summary):1: <変更点と移行の要点>
  • 以降は指摘(最大 8 件):
    • <message>[severity=critical|major|minor|info] を含める。
    • 可能なら “追記案(テンプレ)” を付ける。

追記テンプレ例:

  • 移行ステップ: 1) 準備, 2) 並行稼働, 3) 切替, 4) 清掃(各ステップの完了条件も)
  • ロールバック条件: <監視指標/閾値/期間> / 手順: <戻す操作> / 注意: <データ整合性>

評価指標(Evaluation)

  • 合格基準: 差分に紐づく移行/ロールバックの不足が、優先度付きで短く指摘され、貼れる追記案がある。
  • 不合格基準: 実装前提の断定、差分と無関係な運用一般論、指摘過多。

人間に返す条件(Human Handoff)

  • ロールバック不能(不可逆)やデータ削除を伴う場合、判断が組織/法務/顧客影響に跨るため人間レビューへ返す。
Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 7d ago First seen · 95 lines · 30 tokens per session scan A c7d3b8fb9f9f

Subscribe to this mod's changes

Migration, Rollout & Rollback Plan is a skill published in the GitHub repository s977043/river-review (3 stars, last pushed today), licensed MIT. It adds 30 tokens to every session and 1,246 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.

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