Firebase Security Rules Review SKILL.md skillA
Firebase Security Rules 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/Firebase Security Rules 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
skills/midstream/firebase-security-rules/SKILL.md- Versions recorded
- 2
- Latest version
- v0.1.0, committed Jun 29, 2026
- First version recorded
- Jun 29, 2026
- Size
- 4,022 bytes
- Repository stars
- 7
- License
- MIT
Detects over-permissive Firestore/Storage rules (allow read, write: if true / auth-only without ownership), missing auth checks on writes, and admin SDK private key exposure to client bundles.
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: Firebase Security Rules の過剰許可と認可漏れ、機密 config 露出をチェックリスト型で検査する
## Goal / 目的
- `allow read, write: if true;` や `request.auth != null` だけの所有者チェック欠如ルールを検出し、他人のドキュメント書き換えを防ぐ。
- `allow write` に `request.auth` 条件が無い認証チェック欠如を検出する。
- admin SDK の秘密鍵（service account の `private_key`）がソースに混入しクライアントバンドルへ露出するのを検出する。
## Non-goals / 扱わないこと
- Firestore のクエリ効率やインデックス設計。
- Cloud Functions のロジック妥当性。
- ルールの粒度（コレクション分割方針）の良し悪し（要件依存のため一律指摘しない）。
## 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 Security Rules（`*.rules` / firestore.rules / storage.rules）の追加・変更、または `firebase*.{ts,js}` の config 変更が含まれている
- [ ] 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: firebase-security-rules — Security Rules / config の変更なし`
## False-positive guards / 抑制条件
- 公開コレクション（公開ブログ記事等）で `allow read` の公開が要件上正当であり、その旨のコメントが明記されている場合は read の公開を指摘しない（`write` の公開は別途指摘する）。
- Firebase の **API key（`apiKey`）はクライアント公開が公式仕様**であり秘密情報ではない。これを「秘密露出」と誤検出しない（admin SDK の `private_key` とは明確に区別する）。
- emulator / test 用のルールファイル（`*.test.rules` 等）は別スコープのため指摘しない。
## Rule / ルール
…Read the whole file at its exact version.
How to install
mdr add s977043/river-review/Firebase Security Rules Review@sha256:09b75484e5411da0The 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_d3ul5yj6piwwss2w)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Jun 29, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.1.0 latest | 2026-06-29 | 45e66bc | 4,022 B | A | view · diff |
| v0.1.0 | 2026-06-29 | b988700 | 4,039 B | A | view |
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 (4022 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_d3ul5yj6piwwss2w GET https://markdownregistry.com/api/v1/resolve?ref=s977043/river-review/Firebase Security Rules Review GET https://markdownregistry.com/api/v1/blob/09b75484e5411da0ef39cb8e0822ab0e1c6ea329fe69eb91531ca56bfba1b86a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from s977043/river-review
Every file in s977043/river-review