React Router Loader Boundary Review SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
React Router Loader Boundary Review from s977043/river-review is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add s977043/river-review/React Router Loader Boundary Review@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- s977043/river-review
- Path
plugin-dist/river-review/skills/midstream/react-router-loader-boundary/SKILL.md- Versions recorded
- 1
- Latest version
- v0.1.0, committed Oct 25, 2026
- Size
- 3,791 bytes
- Repository stars
- 7
- License
- MIT
Detects route data fetched in useEffect instead of loaders, server/client API leaks across loader boundaries, and missing HydrateFallback in React Router v7 framework mode.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## Pattern declaration Primary pattern: Reviewer Secondary patterns: Inversion Why: React Router framework mode の data loading 規約への適合をチェックリスト型で検査する ## Goal / 目的 - ルート遷移で確定するデータが `useEffect` + fetch でコンポーネント取得されること（二重フェッチ・レース・hydration mismatch の温床）を防ぐ。 - loader / clientLoader の境界違反（loader 内のクライアント専用 API、clientLoader 内のサーバー専用 API）を検出する。 ## Non-goals / 扱わないこと - action / mutation の規約（`react-router-action-contract` のスコープ）。 - data mode / declarative mode のコード（framework mode のルートモジュールのみ対象）。 - 一般的な React パフォーマンス（modern-web 系 skill のスコープ）。 ## 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。 - [ ] 差分が React Router framework mode のルートモジュール（loader / clientLoader / action の export、または routes 配下）に関係する - [ ] diff コンテキストが利用可能である ゲート不成立時の出力: `NO_REVIEW: react-router-loader-boundary — framework mode ルートの変更なし` ## False-positive guards / 抑制条件 - `useEffect` + fetch が **ナビゲーションに紐づかない** データの場合は指摘しない（ポーリング、WebSocket、リアルタイム更新、サードパーティ SDK 初期化）。「URL / ルート遷移で確定するデータか」で判定する。 - 親ルートの loader で取得済みデータを子が利用する設計は正当。 - data mode / declarative mode のコードには適用しない（モード誤判定が最大の誤検出源）。 ## Rule / ルール - ルート遷移で確定する初期データは `loader`（SSR、サーバー専用 API はクライアントバンドルから自動除去される）に置く。 …
Read the whole file at its exact version.
How to install
mdr add s977043/river-review/React Router Loader Boundary Review@sha256:cefcbbfbd4e6a1f6The line at the top of this page pins the label v0.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_r4gjzlqbminkd7cb)
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Versions
The registry has recorded 1 version of this file, committed on Oct 25, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3791 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
s977043/river-review · 7 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_r4gjzlqbminkd7cb GET https://markdownregistry.com/api/v1/resolve?ref=s977043/river-review/React Router Loader Boundary Review GET https://markdownregistry.com/api/v1/blob/cefcbbfbd4e6a1f61b7d328124adc3fb0969f9d028745d4e1d0316ff9fc29371
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