Coverage and Failure Path Gaps SKILL.md skillA

Coverage and Failure Path Gaps from s977043/river-review is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add s977043/river-review/Coverage and Failure Path Gaps@v0.1.0

Pins 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/downstream/coverage-gap/SKILL.md
Versions recorded
3
Latest version
v0.1.0, committed Jul 20, 2026
First version recorded
Jun 29, 2026
Size
4,715 bytes
Repository stars
7
License
MIT

Find missing tests for critical paths, edge cases, and failure handling in changed code.

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

## 既定 CI レビューでは発火しない / Not triggered on the default CI review path

このスキルは repo 全体の既存テスト木(変更されていないファイルを含む)を要するため、既定 runner の供給コンテキスト(`RUNNER_SUPPLIED_CONTEXTS = ['diff', 'prDescription', 'fullFile']`、`scripts/validate-skills.mjs`)では発火しない。`RIVER_AVAILABLE_CONTEXTS` を拡張して `tests`(repo-wide test tree)を供給する構成でのみ有効になる(`GRANDFATHERED_UNSUPPLIED_CONTEXT` に登録済み、#1606)。

## Pattern declaration

Primary pattern: Reviewer
Secondary patterns: Inversion
Why: カバレッジギャップ検出はチェックリスト型評価が主だが、テスト対象コードが差分に含まれない場合は実行を止める必要がある。

## Rule / ルール

- 主要フローと失敗フローの両方にテストがあることを確認する。
- 例外系・タイムアウト・リトライなどのエラーハンドリングをテストする。
- 変更によって追加/変更された分岐・境界値・フォールバックをカバーする。

## Heuristics / 判定の手がかり

- 新しい条件分岐・ガードが追加されたのに対応するテストがない。
- 例外処理やエラーリターンに対するアサーションが見当たらない。
- 大きな refactor でテストの網羅対象が変わっているのに、テスト差分が少ない。
- クリティカルパス(認証/課金/データ保存など)にテストが不足。
- `coverage_report` でステートメント/ブランチ/ラインの低下が確認できるのに差分テストが増えていない。

## Good / Bad Examples

- Good: 成功・失敗・境界を分けた `describe` / `it` を追加し、エラーメッセージも検証。
- Bad: `happy path` のみのテストで、例外時や空入力時の検証がない。
- Good: `coverage_report` を確認し、差分ファイルのステートメント/ブランチカバレッジを改善。

## Actions / 改善案

- 新規/変更分岐ごとに正常系・異常系テストを追加する(例外メッセージも含めて検証)。
- タイムアウト/リトライ/フォールバックをモックし、意図した失敗動作を確認する。
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add s977043/river-review/Coverage and Failure Path Gaps@sha256:fd222ea1204d0751

The 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_gmpl45vdlkdwf6ro.svg)](https://markdownregistry.com/a/art_gmpl45vdlkdwf6ro)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Jun 29, 2026 and Jul 20, 2026, about one every 11 days.

versioncommittedcommitsizeaudit
v0.1.0 latest2026-07-20 3601204 4,715 BA view · diff
v0.1.02026-06-29 45e66bc 4,140 BA view · diff
v0.1.02026-06-29 b988700 4,158 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (4715 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

GitHub

s977043/river-review · 7 stars · license MIT · pushed 2026-11-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_gmpl45vdlkdwf6ro
GET https://markdownregistry.com/api/v1/resolve?ref=s977043/river-review/Coverage and Failure Path Gaps
GET https://markdownregistry.com/api/v1/blob/fd222ea1204d075168fa1b2a75a9e2fd6440c11e59c881786b0281fa1dfea3d7

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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Every file in s977043/river-review

Other files named Coverage and Failure Path Gaps

Coverage and Failure Path Gaps SKILL.md skill
s977043/river-review · plugin-dist/river-review/skills/downstream/coverage-gap/SKILL.md · Find missing tests for critical paths, edge cases, and failure handling in changed code.
v0.1.0 · audit A · 7 stars

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