feature-development

feature-development is a skill for Claude Code from u9401066/template-is-all-you-need. It costs 64 tokens per session (1,335 once invoked), scanned A, original, Apache-2.0.

A structured workflow for developing a feature from requirements and architecture through tests, implementation, and deployment.

In plain words
What is it for?
Use it for new features that need impact analysis, domain-driven architecture, interfaces, acceptance tests, test generation, and updates to the project's working documentation.
Why use it?
It reduces missed steps by coordinating planning, design, test-driven development (writing tests before the code), and later delivery work.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions Codex.

Good fit Use it for new features that need impact analysis, domain-driven architecture, interfaces, acceptance tests, test generation, and updates to the project's working documentation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/u9401066/template-is-all-you-need/feature-development
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 u9401066/template-is-all-you-need --skill feature-development
Clone the repo
git clone --depth 1 https://github.com/u9401066/template-is-all-you-need

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 feature-development

README.md
[![agentmods](https://agentmods.dev/badge/skills/u9401066/template-is-all-you-need/feature-development/github.svg)](https://agentmods.dev/skills/u9401066/template-is-all-you-need/feature-development)
Your own site
<a href="https://agentmods.dev/skills/u9401066/template-is-all-you-need/feature-development"><img src="https://agentmods.dev/badge/skills/u9401066/template-is-all-you-need/feature-development/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 feature-development

Your own site · 80×15
<a href="https://agentmods.dev/skills/u9401066/template-is-all-you-need/feature-development"><img src="https://agentmods.dev/badge/skills/u9401066/template-is-all-you-need/feature-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,335 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 $0.00064 $0.01335
Opus 5.5 $0.00026 $0.00534
Sonnet 5.5 $0.00013 $0.00267
Haiku 4.5 $0.00006 $0.00134

Measured 1mo ago against content hash e227f1dd4e3a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

feature-development 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/skills/feature-development/SKILL.md · 160 lines

How it starts

The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.

功能開發工作流

描述

完整的功能開發流程,從規劃到部署,編排多個 Skills 協同工作。

觸發條件

  • 「新功能開發」「implement feature」「建立新功能」
  • 「FD: [功能名稱]」

📋 工作流程

┌─────────────────────────────────────────────────────────────┐
│              Feature Development Workflow                    │
├─────────────────────────────────────────────────────────────┤
│  Phase 1: 📐 規劃 (Planning)                                 │
│  ├─ 需求分析與確認                                           │
│  ├─ 識別影響範圍                                             │
│  └─ 更新 Memory Bank (activeContext)                        │
├─────────────────────────────────────────────────────────────┤
│  Phase 2: 🏗️ 架構 (Architecture)                            │
│  ├─ [ddd-architect] 生成 DDD 結構                           │
│  ├─ 建立介面定義                                             │
│  └─ 更新架構文檔                                             │
├─────────────────────────────────────────────────────────────┤
│  Phase 3: 🧪 測試先行 (TDD)                                  │
│  ├─ [test-generator] 生成測試框架                            │
│  ├─ 撰寫失敗的測試案例                                       │
│  └─ 定義驗收標準                                             │
├─────────────────────────────────────────────────────────────┤
│  Phase 4: 💻 實作 (Implementation)                          │
│  ├─ 實作 Domain 層                                          │
│  ├─ 實作 Application 層                                     │
│  ├─ 實作 Infrastructure 層                                  │
│  └─ 實作 Presentation 層                                    │
├─────────────────────────────────────────────────────────────┤
│  Phase 5: ✅ 驗證 (Verification)                            │
│  ├─ 執行測試套件                                             │
│  ├─ [code-reviewer] 程式碼審查                              │
│  ├─ [security-reviewer] 安全檢查                            │
│  └─ 靜態分析 (mypy, ruff, vulture)                          │
├─────────────────────────────────────────────────────────────┤
│  Phase 6: 📦 提交 (Commit)                                  │
│  ├─ [memory-updater] 更新 Memory Bank                       │
│  ├─ [git-precommit] 執行提交前檢查                          │
│  └─ 提交變更                                                │
└─────────────────────────────────────────────────────────────┘

Read the full file on GitHub · 160 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. 1mo ago First seen · 160 lines · 0 tokens per session scan A e227f1dd4e3a

Subscribe to this mod's changes

feature-development is a skill published in the GitHub repository u9401066/template-is-all-you-need (3 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 64 tokens to every session and 1,335 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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