feature-implement

feature-implement is a skill for Claude Code, Codex from s977043/PlanGate. It costs 75 tokens per session (403 once invoked), scanned A, original, MIT.

A workflow skill for implementing a small feature from a design document, with tests, self-review, recorded known issues, and separate commits.

In plain words
What is it for?
Use it during the build-and-refine phase to turn an approved design into tested code and handoff notes.
Why use it?
It gives implementation work a defined sequence and records unfinished work or compromises instead of leaving them unclear. TDD means writing a failing test, making it pass, then improving the code.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/s977043/plangate/feature-implement
Any agent
npx skills add s977043/PlanGate --skill feature-implement
Clone the repo
git clone --depth 1 https://github.com/s977043/PlanGate

Made for: Claude Code, Codex.

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 feature-implement

README.md
[![agentmods](https://agentmods.dev/badge/skills/s977043/plangate/feature-implement.svg)](https://agentmods.dev/skills/s977043/plangate/feature-implement)
Your own site
<a href="https://agentmods.dev/skills/s977043/plangate/feature-implement"><img src="https://agentmods.dev/badge/skills/s977043/plangate/feature-implement.svg" alt="Measured on agentmods" height="20"></a>
Per session 75 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 403 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00075 $0.00403
Opus 5 $0.00037 $0.00201
Sonnet 5 $0.00015 $0.00081
Haiku 4.5 $0.00007 $0.00040

Measured 3d ago against content hash 5ee87e475015, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

feature-implement 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 3d 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.

.agents/skills/feature-implement/SKILL.md · 43 lines

What it actually says

Feature Implement

design artifact に従って、機能を最小単位で実装する Skill。差分ごとに自己レビューと明示的な既知課題の記録を行う。

カテゴリ

Build

想定 Phase

WF-04 Build & Refine

入力

  • design artifact(WF-03 出力)
  • テスト観点(design 内で指定されたもの)
  • 既存コードベース

出力

known-issues artifact + コード差分:

  • 動作するコード(テスト付き)
  • 自己レビュー結果
  • 明示的な既知課題(妥協点 / 未着手項目)
  • 実装単位ごとのコミット履歴

使い方

  • WF-04 で implementation-agent が呼び出す
  • TDD サイクル(RED → GREEN → REFACTOR)を最小単位で回す
  • 出力は WF-05 の入力となる

関連

  • Workflow: docs/workflows/04_build_and_refine.md配布対象外install.sh --claude / plugin / Codex の 3 経路とも導入先には配置されない。解決できない場合は本 Skill の記述を代替正本とし、「正本 <path> を参照できなかった」と明示する)
  • Rule: Rule 2
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. 3d ago First seen · 43 lines · 75 tokens per session scan A 5ee87e475015

Subscribe to this mod's changes

feature-implement is a skill published in the GitHub repository s977043/PlanGate (2 stars, last pushed 3d ago), licensed MIT. It adds 75 tokens to every session and 403 once invoked, about $0.0004 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 2026-08-31.

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