feature

feature is a skill for Claude Code, Codex from duthaho/skillhub. It costs 213 tokens per session (2,159 once invoked), scanned A, original, MIT.

A workflow for building software changes, starting with a short specification and plan when needed, then implementing and verifying the work. TDD, or test-driven development, means writing tests before the code they check.

In plain words
What is it for?
Planning features, breaking work into short tasks, writing tests first for substantial changes, making checkpoint commits, and checking evidence before calling the work finished.
Why use it?
It helps prevent unclear scope, unnecessary process for tiny edits, and unfinished changes that have not been verified.

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/duthaho/skillhub/feature
Any agent
npx skills add duthaho/skillhub --skill feature
Clone the repo
git clone --depth 1 https://github.com/duthaho/skillhub

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/duthaho/skillhub/feature.svg)](https://agentmods.dev/skills/duthaho/skillhub/feature)
Your own site
<a href="https://agentmods.dev/skills/duthaho/skillhub/feature"><img src="https://agentmods.dev/badge/skills/duthaho/skillhub/feature.svg" alt="Measured on agentmods" height="20"></a>
Per session 213 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,159 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00213 $0.02159
Opus 5 $0.00106 $0.01079
Sonnet 5 $0.00043 $0.00432
Haiku 4.5 $0.00021 $0.00216

Measured 3d ago against content hash 400223c60c7f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

feature scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

it works (a command, a flow to click through, a curl). When an answer would
.claude/skills/feature/SKILL.md · 177 lines

How it starts

The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.

feature — spec → plan → build, effort-scaled

/feature <description> — start (or resume) a piece of work /feature — list changes in flight under out/dev/

Answer one question: what is the smallest process that gets THIS change built correctly? The two documented failure modes of workflow suites are opposite: heavyweight gates firing on typo-sized changes, and freestyle sessions shipping unverified scope creep. This skill scales the process to the change — never the other way around.

Step 0 — Size the change (the escape hatch comes first)

Classify before doing anything else, and say which tier you picked:

  • Trivial — you could describe the exact diff in one sentence (typo, rename, config value, one-line fix). → No spec, no plan, no folder. Make the change, then run the done gate's evidence checklist inline. Stop here.
  • Small — one focused change, ≤ ~3 files, design obvious. → Skip the spec interview; write the plan directly in chat for approval, execute with the Step 3 rules, finish with done. No folder unless the user wants to pause and resume.
  • Standard — anything multi-file, multi-session, or with real design decisions. → Full loop below.

If the user explicitly asks for the full treatment ("spec this out"), honor it regardless of size. When genuinely unsure between tiers, pick the smaller one and say so — the plan contract (Step 3) catches scope growth and upgrades the tier if needed.

The change folder — state across sessions

out/dev/<change-slug>/ (<slug> = short change name, lowercased, hyphens; committing the folder is the user's call — it makes good shared history):

  • spec.md — what & why, agreed acceptance criteria, decisions/assumptions numbered (D1…/A1…). Written once, then stable.
  • plan.md — the task checklist. Checkboxes are flipped as tasks complete; never delete a task, strike it with a reason instead.
  • log.mdappend-only progress journal: one line per task/session (date · task · result · commit). Decisions and surprises go here too.

Read the full file on GitHub · 177 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. 3d ago First seen · 177 lines · 213 tokens per session scan A 400223c60c7f

Subscribe to this mod's changes

feature is a skill published in the GitHub repository duthaho/skillhub (9 stars, last pushed 10d ago), licensed MIT. It adds 213 tokens to every session and 2,159 once invoked, about $0.0011 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.