feature

A Russian-language workflow for taking one software feature through development while allowing only one active feature at a time. It also uses tests, project rules, and reviews from both a tester and a user-focused critic.

In plain words
What is it for?
It is for starting a feature, choosing a lighter or heavier work path based on its size, and stopping when required checks or project protections are not active.
Why use it?
It helps prevent multiple unfinished features from competing for attention and checks that the project’s process safeguards are working first.

Skill for Claude CodeCodex

Part of the vibe-dev plugin — 29 skills, 24 agents, 7 hooks shipped together

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/andrewcigan/vibe-dev-plugin/feature
Any agent
npx skills add andrewcigan/vibe-dev-plugin --skill feature
Clone the repo
git clone --depth 1 https://github.com/andrewcigan/vibe-dev-plugin

Made for: Claude Code, Codex.

Or install vibe-dev, the plugin that ships this one along with the rest of its 29 skills, 24 agents, 7 hooks.

Per session 81 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,938 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 $0.00081 $0.02938
Opus 5 $0.00041 $0.01469
Sonnet 5 $0.00016 $0.00588
Haiku 4.5 $0.00008 $0.00294

Measured 3d ago against content hash d3c07e5bfbb6, 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 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.

skills/feature/SKILL.md · 196 lines

How it starts

The opening of the file, as written. The whole thing — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/feature

Запуск одной фичи. WIP=1 enforced — другую фичу взять нельзя пока эта не passing.

Pre-flight checks

Check 0: Enforcement жив? (v6.2 F2; discipline-слой, несущий канал — pre-commit backstop)

P="$(cat .harness/profile 2>/dev/null)"; HB=.harness/hooks-heartbeat
case "$P" in pending-*) echo "❌ профиль $P не подтверждён живым хуком — enforcement НЕ активен"; esac
[ -f "$HB" ] && [ $(( $(date +%s) - $(awk '{print $1;exit}' "$HB") )) -le 1800 ] \
  || echo "❌ heartbeat несвежий/отсутствует — хуки в этой сессии НЕ работают"
ls .harness/hook-crashes/ 2>/dev/null && echo "⚠️ сторожа падали — см. /doctor"

Любая строка с ❌ → STOP: запусти /doctor, почини активацию, потом возвращайся к фиче. Работать над фичей при мёртвых сторожах = «харнес не поднялся» (главный провал аудита 06-10).

Check 1: WIP=1

# В feature_list.json должна быть ровно одна active или ноль
python3 -c "
import json
d = json.load(open('feature_list.json'))
active = d.get('active')
if active is not None and active != '<this-feature-id>':
    print(f'❌ WIP=1 violated: feat \"{active}\" already active. Закрой её через /verify до passing или /handoff с paused.')
    exit(1)
"

Если нарушено — STOP, скажи пользователю.

Check 2: Feature существует в captured/up_next

Если фича в done — спроси пользователя зачем заново. Если фича в superseded/rejected — STOP.

Check 3: Зависимости

# Если feat.dependencies = ["feat-001", "feat-002"] — все должны быть в done

Если нет — предложить взять зависимости сначала.

Размер и ПОВЕРХНОСТЬ фичи → light/heavy path

Из feature_list.json смотрим size_estimate И surface (v6.2 F5 — урок П2 аудита: «зелёные тесты лгут» именно на интерфейсных фичах, которые по размеру проскакивали мимо критика):

  • S (<1 час, ~30 строк, 1 файл)light path (syntax + scope check, без dual critique)
  • M (1-4 часа, 30-200 строк)medium path (single critic + verify)
  • L (1+ день, >200 строк)heavy path (dual critique + 4-layer verify)

Read the full file on GitHub · 196 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 · 196 lines · 81 tokens per session scan A d3c07e5bfbb6

Subscribe to this mod's changes

feature is a skill published in the GitHub repository andrewcigan/vibe-dev-plugin (5 stars, last pushed 1mo ago), licensed MIT. It adds 81 tokens to every session and 2,938 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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