planreview

planreview is a skill for Codex from noho/code-is-cheap. It costs 66 tokens per session (2,956 once invoked), scanned A, original, Apache-2.0.

A planning review that aggressively checks implementation plans before coding begins. It looks for hidden assumptions, missing steps, unsafe ordering, weak testing, and risks that could make the plan fail.

In plain words
What is it for?
Use it to review feature plans, migration plans, database or storage plans, public interfaces, state-machine designs, and plans involving concurrency or recovery.
Why use it?
It helps catch expensive problems before an implementation agent starts work. It tests whether the plan is specific and safe enough to hand over.

Skill for Codex

Written for Codex: agents/openai.yaml present.

Good fit Use it to review feature plans, migration plans, database or storage plans, public interfaces, state-machine designs, and plans involving concurrency or recovery.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/noho/code-is-cheap/planreview
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 noho/code-is-cheap --skill planreview
Clone the repo
git clone --depth 1 https://github.com/noho/code-is-cheap

Made for: 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 planreview

README.md
[![agentmods](https://agentmods.dev/badge/skills/noho/code-is-cheap/planreview/github.svg)](https://agentmods.dev/skills/noho/code-is-cheap/planreview)
Your own site
<a href="https://agentmods.dev/skills/noho/code-is-cheap/planreview"><img src="https://agentmods.dev/badge/skills/noho/code-is-cheap/planreview/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 planreview

Your own site · 80×15
<a href="https://agentmods.dev/skills/noho/code-is-cheap/planreview"><img src="https://agentmods.dev/badge/skills/noho/code-is-cheap/planreview.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,956 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00066 $0.02956
Opus 5.5 $0.00026 $0.01182
Sonnet 5.5 $0.00013 $0.00591
Haiku 4.5 $0.00007 $0.00296

Measured 16d ago against content hash cabe829df2e1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

planreview 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 16d 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/planreview/SKILL.md · 198 lines

How it starts

The opening of the file, as written. The whole thing — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Planreview

Planreview 通过可信反例和直接证据,判断 plan 是否有实际阻止正确实现已确认目标的问题。主动挑战隐藏耦合、错误假设、 不安全 sequencing、必要信息缺失和过度设计;允许无 material finding 直接通过,不以发现问题的数量衡量审核质量。

When To Use

重要契约、架构、迁移或状态机决策在 implementation 前使用本 skill,包括涉及这些决策的 implementation、migration phase、 feature slice、schema/storage、concurrency/recovery 或 Gateflow handoff plan。用户或项目显式要求的 plan review 仍执行。 Gateflow 中简单计划由总控核对,不因它是 plan 就自动增加独立审核。

不要用它 review 已经写好的代码;代码或 PR review 使用 deepreview。

Invocation Handling

示例:

$planreview review this plan
$planreview docs/host/phase8-plan.md
$planreview stress-test this implementation plan

如果 target plan 不清楚,只问一个简短澄清问题。如果用户给了 plan 文件,review 该 artifact,并按需要读取相关周边 docs 和 code facts 来判断。

Review Posture

保持 constructively adversarial:

  • 主动尝试证伪关键假设,以当前证据判断是否有 material issue,不预设一定存在重要问题。
  • 不因为 good intent、partial fixes 或可能的 follow-up work 给 plan 加分。
  • 如果方案只覆盖 happy path,把它视为真实弱点。
  • 判断 plan 是否已明确目标行为、实现方向、必要职责/架构边界、重要契约与状态语义、影响范围和验证依据; 缺陷类任务还须明确根因。函数拆分、局部数据结构、分支和算法留给实现者,需要实际代码判断的问题交完整代码审核。
  • 找 failure modes,不做风格偏好 review。
  • 挑战 motivation、scope、sequencing 和 hidden assumptions。
  • 优先使用 plan artifact、source docs、code、tests、schemas、state machines 和 existing behavior 的直接证据。
  • 不制造 blocker。可信但未证实的问题放到 Open Questions 或 Residual Risk。
  • 对已证实的错误模型或职责边界检查是否解决根因;必要内部重构不因修改较大被否定。非必要机制优先删除或简化。

Attack Surface

优先寻找高成本、危险、用户可见或难以发现的失败:

  • scope、non-goals、ownership、file boundaries 或 implementation slice boundaries 不清;
  • goal drift:plan 增加 Goal Confirmation 未确认的目标、验收标准、设计强化、风险修复或 future-slice work;
  • plan 缺少正确实现所需的目标行为、关键契约、职责、状态语义或验证依据;
  • 过度耦合:plan 把本应独立的层、模块、状态机、数据模型、工具、测试或 rollout 步骤绑在一起,导致局部变更需要跨层联动;
  • auth、permissions、tenant isolation、trust boundaries、privilege escalation;
  • data loss、corruption、duplication、stale facts、irreversible state changes;
  • rollback safety、retries、partial failure、re-entrancy、idempotency gaps;
  • race conditions、ordering assumptions、stale state、ownership conflicts、late writes;
  • empty-state、null、timeout、cancellation、degraded dependency、unavailable dependency behavior;
  • version skew、schema drift、migration hazards、compatibility regressions、mixed old/new state;
  • observability gaps,导致失败被隐藏、audit 不可能或 recovery 更困难;
  • test gaps,只计划或证明 happy path。

Read the full file on GitHub · 198 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 16d ago Changed · -6 lines · -7 tokens per session cabe829df2e1
  2. 17d ago Changed · +5 lines 2e869b22887d
  3. 2mo ago First seen · 199 lines · 73 tokens per session scan A aa5878d7e840

Subscribe to this mod's changes

planreview is a skill published in the GitHub repository noho/code-is-cheap (94 stars, last pushed 7d ago), licensed Apache-2.0. It adds 66 tokens to every session and 2,956 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 2026-08-30.

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