Review Automation Boundary Guard

Review Automation Boundary Guard is a skill for Claude Code from s977043/river-review. It costs 21 tokens per session (2,579 once invoked), scanned A, original, MIT.

A code-review check that identifies findings better handled by automated tools such as CI, linters, or formatters.

In plain words
What is it for?
Use it during code changes to suggest moving deterministic style, naming, formatting, and similar checks into project automation.
Why use it?
It keeps human review focused on design, requirements, and security decisions instead of repetitive checks that software can perform consistently.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

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

Good fit Use it during code changes to suggest moving deterministic style, naming, formatting, and similar checks into project automation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/s977043/river-review/review-automation-boundary
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 review-automation-boundary
Clone the repo
git clone --depth 1 https://github.com/s977043/river-review

Made for: Claude Code.

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 Review Automation Boundary Guard

README.md
[![agentmods](https://agentmods.dev/badge/skills/s977043/river-review/review-automation-boundary/github.svg)](https://agentmods.dev/skills/s977043/river-review/review-automation-boundary)
Your own site
<a href="https://agentmods.dev/skills/s977043/river-review/review-automation-boundary"><img src="https://agentmods.dev/badge/skills/s977043/river-review/review-automation-boundary/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 Review Automation Boundary Guard

Your own site · 80×15
<a href="https://agentmods.dev/skills/s977043/river-review/review-automation-boundary"><img src="https://agentmods.dev/badge/skills/s977043/river-review/review-automation-boundary.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,579 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 $0.00021 $0.02579
Opus 5 $0.00010 $0.01290
Sonnet 5 $0.00004 $0.00516
Haiku 4.5 $0.00002 $0.00258

Measured 9d ago against content hash ab6bb218a765, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

Review Automation Boundary Guard 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 9d 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/midstream/review-automation-boundary/SKILL.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Pattern declaration

Primary pattern: Reviewer Secondary patterns: Inversion Why: 自動化可能なレビュー指摘を検出しCI/lint委譲を提案するが、コード変更を含まない差分では実行不要

Goal / 目的

  • レビュー指摘の中から「自動化できるはずの指摘」を検出し、CI/lint/フォーマッタに委ねることで人間レビューの密度を高める。
  • 「機械が判定できること」をレビューに持ち込まず、人間にしか判断できない設計・仕様・セキュリティ判断に集中させる。

外部実証: 「コードレビュー指摘300件を3ヶ月分類したら効いていたのは2種類だけだった」(井本 賢, 2026-07-04)は、実際に効果があった指摘は Bug/Spec 系のみだったと報告する。Style/Naming/Refactor/Arch 系は効果が低く自動化・前倒しに適するという結果は、本スキルの方針を裏付ける一次データとして参照できる。

外部実証(続報): 「AIレビューのブロックを100PRで測ったら、70PRはno-verifyで通り抜けていた」(井本 賢, 2026-07-23)は、100 PR の実測で pre-commit hook のブロックのうち 70% が --no-verify で回避されていたと報告します。強制ゲートの守備範囲を「壊れて動かないコード」(構文エラー・smoke test 失敗)へ絞り、lint / 型 / スタイルの判定を AI レビュー側へ移したところ、ブロック後の修正率は 30% から 83% へ改善しました。この前後比較も、本スキルの方針を裏付ける一次データとして参照できます。

Non-goals / 扱わないこと

  • 自動化できない判断(設計方針、セキュリティ上のトレードオフ、仕様の解釈)への言及。
  • 実際のコード修正の提案(このスキルはツール設定の提案のみを行う)。
  • プロジェクトのスタイルガイドや規約そのものの是非を評価すること。
  • 既に CI に設定が存在するルールへの重複指摘。

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。

  • 差分にソースコード(テスト/フィクスチャのみでない)の変更が含まれている
  • 差分がツール設定ファイル(.eslintrc, .prettierrc, tsconfig.json等)のみの変更ではない
  • inputContextにdiffが含まれている

ゲート不成立時の出力: NO_REVIEW: review-automation-boundary — 自動化境界レビューの対象となるソースコード変更が検出されない

False-positive guards / 抑制条件

  • 差分内に該当ツールの設定ファイル変更が含まれている場合、そのルールは追加中と判断し指摘しない。差分外のリポジトリ設定は確認できないため、断定ではなく「設定がなければ」という条件付きで提案する。
  • マイグレーションや一時的な移行期であることが PR 説明から明確な場合は抑制する。

Rule / ルール

  • 差分に「フォーマッタで自動修正できるはずのパターン」(インデント、末尾スペース、クォートスタイル等)が含まれる場合、CI へのフォーマッタ追加を促す。
  • 差分に「lint ルールで自動検出できるはずのパターン」(未使用変数、console.log の残留、コメントアウトコード等)が含まれる場合、対応する lint ルールの追加を促す。
  • 差分に「命名規則の逸脱」が含まれる場合、命名規則チェッカー(ESLint の naming-convention ルール等)の追加を促す。
  • import 順序の乱れ、ファイル末尾改行の欠如など、ツールで強制できる規約の逸脱を見つけた場合、人間レビューで指摘するのではなくツール設定を提案する。

Evidence / 根拠の取り方

  • 指摘は差分に紐づける(<file>:<line> で追える内容)。
  • 自動化提案には具体的なツール名とルール名を添える。
  • 推測を断定しない(不確実なら "可能性" として書く)。

Read the full file on GitHub · 157 lines

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. 9d ago First seen · 157 lines · 21 tokens per session scan A ab6bb218a765

Subscribe to this mod's changes

Review Automation Boundary Guard is a skill published in the GitHub repository s977043/river-review (3 stars, last pushed yesterday), licensed MIT. It adds 21 tokens to every session and 2,579 once invoked, about $0.0001 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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