implement-feature

implement-feature is a skill for Claude Code, Codex from forest6511/claude-code-recipes-v2. It costs 2 tokens per session (116 once invoked), scanned A, original, MIT.

A coding-agent instruction for implementing a requested feature. It requires a test-first approach and checking the test results after files are changed.

In plain words
What is it for?
Use it when asking an agent to build a feature in a codebase where tests should guide the implementation.
Why use it?
It gives feature work a simple order: write tests, implement the change, and verify the outcome.

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/forest6511/claude-code-recipes-v2/implement-feature
Any agent
npx skills add forest6511/claude-code-recipes-v2 --skill implement-feature
Clone the repo
git clone --depth 1 https://github.com/forest6511/claude-code-recipes-v2

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 implement-feature

README.md
[![agentmods](https://agentmods.dev/badge/skills/forest6511/claude-code-recipes-v2/implement-feature.svg)](https://agentmods.dev/skills/forest6511/claude-code-recipes-v2/implement-feature)
Your own site
<a href="https://agentmods.dev/skills/forest6511/claude-code-recipes-v2/implement-feature"><img src="https://agentmods.dev/badge/skills/forest6511/claude-code-recipes-v2/implement-feature.svg" alt="Measured on agentmods" height="20"></a>
Per session 2 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 116 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 $0.00002 $0.00116
Opus 5 $0.00001 $0.00058
Sonnet 5 $0.00000 $0.00023
Haiku 4.5 $0.00000 $0.00012

Measured 4d ago against content hash 54bb9882680f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

implement-feature 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 4d 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.

ch09-skills-tips/recipe-52/.claude/skills/implement-feature/SKILL.md · 20 lines

What it actually says

機能実装

$ARGUMENTS を実装してください。

ルール

  • テストファーストで実装する
  • ファイル変更後にテストが自動実行されるので、結果を確認する
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. 4d ago First seen · 20 lines · 2 tokens per session scan A 54bb9882680f

Subscribe to this mod's changes

implement-feature is a skill published in the GitHub repository forest6511/claude-code-recipes-v2 (5 stars, last pushed 4mo ago), licensed MIT. It adds 2 tokens to every session and 116 once invoked, about $0.0000 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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