Closure Scope Retention Guard 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.
Closure Scope Retention Guard 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/Closure Scope Retention Guard@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/closure-scope-retention/SKILL.md- Versions recorded
- 1
- Latest version
- v0.1.0, committed Oct 25, 2026
- Size
- 6,653 bytes
- Repository stars
- 7
- License
- MIT
Detects long-lived objects (caches, listeners, singletons) that capture an entire enclosing scope via closures/environment capture, keeping large arrays or buffers alive, and proposes copying only the needed fields.
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
> 由来: Claude Code の `/simplify`（Efficiency 観点の closure 保持）に由来（inspired by）。Issue #1452 P3 で、`skills/agent-skills/river-review-code/references/SIMPLIFY.md` から closure スコープ保持の詳細検出を本 registry skill へ委譲した。 ## Pattern declaration Primary pattern: Reviewer Secondary patterns: Inversion Why: 長寿命オブジェクトの closure 保持をチェックリストで評価するが、保持の証拠が差分に無い変更では実行しない。 ## Goal / 目的 - 長寿命オブジェクト（キャッシュ・リスナー・シングルトン・戻り値として保存されるオブジェクト）が、closure/環境キャプチャで enclosing scope 全体（大きな配列・一時バッファ等）を生存させ続けるメモリ保持を防ぐ。 - 必要なフィールドだけをコピーする形（class / 明示フィールド化 / 縮約済み構造）を促す。 ## Non-goals / 扱わないこと - correctness bug・セキュリティ欠陥は対象外（bug 系・security 系観点の責務）。 - 短命な関数スコープ内で完結し、戻り後に到達不能になる一時変数は対象外。 - 一般的なパフォーマンス最適化論（ホットパスの計算量など）は SIMPLIFY 側 Efficiency の残余に委ねる。 ## applyTo に `scripts/**` と `runners/**` を含める理由 `applyTo` の各 glob は拡張子で境界付けした midstream ソース限定（scoping ガイド「midstream (application source)」の範囲内）である。長寿命 singleton / キャッシュは `src/` に限らず `scripts/`・`runners/` の常駐プロセス・起動パスにも生じ得るため、SIMPLIFY の applyTo 経路差を解消する目的で実行コードを持つ3ルートを対象にする。`tests/**`・`docs/**`・`dist/**` は含めない。 ## 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。dispatcher 経路では Gate が強制されないため、実行時に本文の Gate を必ず自己適用する。 …
Read the whole file at its exact version.
How to install
mdr add s977043/river-review/Closure Scope Retention Guard@sha256:b4de95c44186f84cThe 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_4b6zqxw3ynhzzzyl)
2 badge image fetches in 30 days. What the badge shows.
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 (6653 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_4b6zqxw3ynhzzzyl GET https://markdownregistry.com/api/v1/resolve?ref=s977043/river-review/Closure Scope Retention Guard GET https://markdownregistry.com/api/v1/blob/b4de95c44186f84c16b9c480aabed8f3fd1150db910a24df6e219d6be504327e
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.
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