impl

impl is a skill for Claude Code from tomoking2004/claude-plugins. It costs 84 tokens per session (586 once invoked), scanned A, original, MIT.

A code-review workflow that checks whether an implementation matches the project's agreed plan and evaluation criteria. It uses `.claude/context.md` as the reference document.

In plain words
What is it for?
Use it to review source code, check whether it should work, identify where the plan appears in the implementation, and suggest approved improvements. It does not alter `.claude/context.md` or push Git changes.
Why use it?
It helps find mismatches, errors, and omissions in code without changing the project's underlying direction. Proposed fixes require approval before they are made.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the groundwork plugin — 3 skills shipped together

Good fit Use it to review source code, check whether it should work, identify where the plan appears in the implementation, and suggest approved improvements. It does not alter .claude/context.md or push Git changes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tomoking2004/claude-plugins/impl
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 tomoking2004/claude-plugins --skill impl
Clone the repo
git clone --depth 1 https://github.com/tomoking2004/claude-plugins

Made for: Claude Code.

Or install groundwork, the plugin that ships this one along with the rest of its 3 skills.

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 impl

README.md
[![agentmods](https://agentmods.dev/badge/skills/tomoking2004/claude-plugins/impl/github.svg)](https://agentmods.dev/skills/tomoking2004/claude-plugins/impl)
Your own site
<a href="https://agentmods.dev/skills/tomoking2004/claude-plugins/impl"><img src="https://agentmods.dev/badge/skills/tomoking2004/claude-plugins/impl/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 impl

Your own site · 80×15
<a href="https://agentmods.dev/skills/tomoking2004/claude-plugins/impl"><img src="https://agentmods.dev/badge/skills/tomoking2004/claude-plugins/impl.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 586 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 $0.00084 $0.00586
Opus 5.5 $0.00034 $0.00234
Sonnet 5.5 $0.00017 $0.00117
Haiku 4.5 $0.00008 $0.00059

Measured 1mo ago against content hash 3825cc54625d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

impl 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 1mo 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.

plugins/groundwork/skills/impl/SKILL.md · 25 lines

What it actually says

対象:指定された範囲のソース;無指定ならプロジェクト全ソース(生成物・.gitignore 対象は除く).

手順

  1. 前提確認:.claude/context.md を読む.存在しなければ「/groundwork:survey を先に実行してください」と伝え,中断する.
  2. 実装の把握:対象範囲のソースをリストし,文脈の各要素が実装のどこに対応するかを特定する.
  3. 整合の検証:文脈の ## 整合条件 を,実装を実際に読んで一つずつ確認する.
  4. 評価基準の検証:文脈の ## 評価基準 の各指標が,実装で正しく計算されていることを確認する.
  5. 改善候補の提示:意図との乖離・誤り・見落としている観点を箇条書きで提示する.承認は平文の提案へのチャットの返信で受ける——選択式ダイアログは提案の表示を妨げるため使わない.
  6. 改善:承認された改善を実施する.
  7. 確定:手順3・4を再実行しゼロを確認してから確定する——止める根拠は走査がゼロを返すことだけで,印象で切り上げない.改善が別の整合条件・評価基準を壊していないかも含めて確かめる.

制約

.claude/context.md の内容(方針)は変えない;理論的な問題が見つかっても実装は変えず,/groundwork:theory で議論するよう促す.実装の変更は事前に承認を求める.判断の割れる箇所は推測せず問う.git は読み込みのみ.

失敗時

/heal:skill を呼ぶ.

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. 1mo ago First seen · 25 lines · 84 tokens per session scan A 3825cc54625d

Subscribe to this mod's changes

impl is a skill published in the GitHub repository tomoking2004/claude-plugins (3 stars, last pushed 2mo ago), licensed MIT. It adds 84 tokens to every session and 586 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-31.

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