dev-plan

A planning tool that breaks a software project into features arranged in dependency-based waves, or groups of work that can be done in sequence or parallel.

In plain words
What is it for?
Use it to create feature_list.json, a ROADMAP.md, and wave plans before implementation. It helps identify which feature should be built next.
Why use it?
It turns broad project documents into an ordered task list and checks that tasks have files, verification steps, business rules, budgets, and no circular dependencies.

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

Made for: Claude Code, Codex.

Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 653 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 $0.00071 $0.00653
Opus 5 $0.00036 $0.00327
Sonnet 5 $0.00014 $0.00131
Haiku 4.5 $0.00007 $0.00065

Measured 2d ago against content hash 1a05c5304983, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

dev-plan 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 2d 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/dev-plan/SKILL.md · 62 lines

What it actually says

/dev-plan

Wave-план через dev-planner agent.

Что происходит

  1. Subagent dev-planner (Opus) читает architecture-detail.md, phases.md, domain-rules
  2. Map sections → features в feature_list.json
  3. Каждая feature получает:
    • id, name, description, wave
    • dependencies (от каких других)
    • size_estimate (S/M/L → light/heavy path в /feature)
    • affected_files явно
    • verification (4-layer)
    • business_invariant ссылка на domain-rules.invariants
    • budget_usd
  4. reordering-agent валидирует DAG (нет циклов)

Output

  • Обновлённый feature_list.json (captured + up_next)
  • docs/ROADMAP.md

Stage verifier

  • Все features имеют affected_files
  • Все features имеют verification
  • DAG без циклов
  • Total budget ≤ monthly_total_budget_usd

Дальше

/validation-sample — строим эталонную выборку.

После — /feature feat-001 (первая фича из Wave 1).

Финальное сообщение (обязательный формат)

Финализируй шаблоном B (см. rules/message-finalization.md):

Готово. Wave-план: 8 фичей в 3 волнах, docs/ROADMAP.md обновлён.

Волна 1 (parallel, 2 фичи): foundation (database + auth)
Волна 2 (зависит от 1, 3 фичи): API + business logic
Волна 3 (зависит от 2, 3 фичи): UI + integrations

Объём: 8 фичей (5×M + 3×L). Critical path: 5 фичей.
LLM-cost оценочно: ~$X на all features.
Внешняя рамка поставки клиенту: <из cost_policy / domain-rules>.

Вопросов от меня нет. Следующий шаг — /validation-sample (эталонная выборка 50-100 сценариев). Согласен?

НЕ оценивать в человеко-днях. См. rules/no-human-days.md — используем количество фичей + size_estimate (S/M/L). Внешний дедлайн клиента в днях — допустим только как «внешняя рамка поставки», не «бюджет нашей работы».

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. 2d ago First seen · 62 lines · 71 tokens per session scan A 1a05c5304983

Subscribe to this mod's changes

dev-plan is a skill published in the GitHub repository andrewcigan/vibe-dev-plugin (5 stars, last pushed 1mo ago), licensed MIT. It adds 71 tokens to every session and 653 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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