plan-quality-check

plan-quality-check is a skill for Claude Code from s977043/PlanGate. It costs 98 tokens per session (1,103 once invoked), scanned A, original, MIT.

A lightweight checker for written project plans. It reviews whether the goal, scope, risks, assumptions, completion conditions, and next actions are clear.

In plain words
What is it for?
Use it before starting a project or high-risk task to check the plan, identify risks and assumptions, and confirm how completion and validation will be determined.
Why use it?
Plans can miss important dependencies or fail to say how success will be verified and when work should stop. This exposes those gaps before implementation begins.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it before starting a project or high-risk task to check the plan, identify risks and assumptions, and confirm how completion and validation will be determined.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/s977043/plangate/plan-quality-check
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/PlanGate --skill plan-quality-check
Clone the repo
git clone --depth 1 https://github.com/s977043/PlanGate

Made for: Claude Code.

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 plan-quality-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/s977043/plangate/plan-quality-check/github.svg)](https://agentmods.dev/skills/s977043/plangate/plan-quality-check)
Your own site
<a href="https://agentmods.dev/skills/s977043/plangate/plan-quality-check"><img src="https://agentmods.dev/badge/skills/s977043/plangate/plan-quality-check/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 plan-quality-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/s977043/plangate/plan-quality-check"><img src="https://agentmods.dev/badge/skills/s977043/plangate/plan-quality-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,103 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 $0.00098 $0.01103
Opus 5 $0.00049 $0.00551
Sonnet 5 $0.00020 $0.00221
Haiku 4.5 $0.00010 $0.00110

Measured 7d ago against content hash 3b488e614891, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

plan-quality-check 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 7d 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.

.claude/skills/plan-quality-check/SKILL.md · 69 lines

How it starts

The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Quality Check

計画文書(目的・スコープ・成功条件・完了条件)を読み、品質を構造化して 返す軽量 Check の Skill。重い Gate / Agent orchestration / PR review / QA automation には依存しない(手動実行可能・補助情報)。

カテゴリ

Design

想定 Phase

計画レビュー前後の軽量確認(計画作成直後・実装着手前)

役割

3 種の Check を単独または統合(combined)で実行する:

Check 目的 主出力
plan_check 目的・対象・成功条件・スコープの明確さを確認 score / missing_items / summary
risk_check 失敗要因・依存関係・未決事項・暗黙の前提を確認 risks / assumptions / next_actions
done_check 完了条件・検証方法・リリース後確認を確認 done_criteria / validation_notes

補足: done_check は**停止条件(completion / stop condition)の記述有無を、risk_check再計画トリガ(前提崩壊・逸脱を検知する定量条件)**の記述有無を確認観点に含める。いずれも汎用観点であり、具体のチェック項目はプロジェクト側テンプレート(例 review-self)で定義する。

補足2: high-risk / critical の実装タスクでは rollback(戻し手順)の記述有無done_check の確認観点に含める。rollback 欠落は安全側(needs_clarification)に倒す。具体項目は review-self テンプレで定義(C1-TODO-RB)。 補足3(TASK-0129 / #543): Loop 安全制御チェックdone_check / risk_check 観点に追加する:

ID チェック内容 判定
C1-LOOP-01 plan に Stop Condition(停止条件)が記入されているか 未記入 → WARN(high-risk/critical では FAIL
C1-LOOP-02 plan に Replan Triggers と機械値(閾値)が記入されているか 未記入 → WARN、機械値なし → WARN(high-risk/critical では FAIL

これらは #544/#551 の Loop 安全制御(Phase1 検出)と連動し、 C-3 承認不可の strict Gate(Phase2)へ接続する(docs/ai/review-gate-decision-mapping.md §5 参照)。

入力

  • 計画文書(目的 / スコープ / 受入基準 / 完了条件を含むテキスト)
  • 任意: 確認したい Check 種別(plan_check / risk_check / done_check / combined)

出力

  • 結果 JSON(score, decision, summary, missing_items, risks, assumptions, done_criteria, next_actions, 任意 score_breakdown, validation_notes
  • 出力構造はリポジトリ側スキーマ(schemas/plan-quality-check.schema.json) に準拠させる
  • 自由文サマリも併記してよいが、機械処理対象は JSON とする

Plan Health Score の考え方

0-100。最小内訳: goal_clarity / scope_defined / success_metric / risks_identified / done_criteria_defined。閾値で助言的に ready / needs_clarification / insufficient を返す。

制約

  • 本 Check の decision助言であり、人間承認・ゲート判定の 代替にしない。
  • 重い自動実行(PR review / browser QA / pair-agent)を呼び出さない。
  • 不足が判定不能なときは安全側(より低い score / needs_clarification)。

Read the full file on GitHub · 69 lines

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. 7d ago First seen · 69 lines · 98 tokens per session scan A 3b488e614891

Subscribe to this mod's changes

plan-quality-check is a skill published in the GitHub repository s977043/PlanGate (2 stars, last pushed today), licensed MIT. It adds 98 tokens to every session and 1,103 once invoked, about $0.0005 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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