review-zod

review-zod is a skill for Claude Code from louisbrulenaudet/monorepo-template. It costs 66 tokens per session (959 once invoked), scanned A, original, Apache-2.0.

A review skill for Zod, a library that checks whether data matches defined shapes. It examines schemas and validation at boundaries where data enters or leaves the application.

In plain words
What is it for?
Use it to review shared data-transfer schemas, HTTP routes, browser clients, queue messages, and webhook payloads, including how values are parsed and errors are reported.
Why use it?
It helps catch inconsistent schemas, unsafe data handling, incorrect type assumptions, and outdated Zod usage across connected parts of the system.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: model in frontmatter; installed under .agents/ (shared by several agents); mentions AGENTS.md.

Good fit Use it to review shared data-transfer schemas, HTTP routes, browser clients, queue messages, and webhook payloads, including how values are parsed and errors are reported.

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Install with agentmods
npx agentmods add skills/louisbrulenaudet/monorepo-template/review-zod
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 louisbrulenaudet/monorepo-template --skill review-zod
Clone the repo
git clone --depth 1 https://github.com/louisbrulenaudet/monorepo-template

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 review-zod

README.md
[![agentmods](https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/review-zod/github.svg)](https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/review-zod)
Your own site
<a href="https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/review-zod"><img src="https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/review-zod/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 review-zod

Your own site · 80×15
<a href="https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/review-zod"><img src="https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/review-zod.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 959 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 $0.00066 $0.00959
Opus 5 $0.00033 $0.00479
Sonnet 5 $0.00013 $0.00192
Haiku 4.5 $0.00007 $0.00096

Measured 12d ago against content hash 14e388d3d2e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

review-zod 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 12d 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.

.agents/skills/review-zod/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review Zod

Review Zod usage across contract boundaries (@repo/dtos-common, HTTP routes, SPA clients, queue/webhook payloads) for alignment with current official Zod v4 best practices - schema organization, typing, and parse performance. Your reply must be a plan of suggested changes: concise, actionable, structured - not only prose.

Invocation

Text after the slash command is additional scope/focus (e.g. "dtos-common only", "error formatting") - narrow the review accordingly.

Ground truth (mandatory)

Your pre-trained knowledge of Zod may be outdated (v3 → v4 changed APIs and error internals significantly). Do not draft suggestions from memory alone.

  1. Resolve "Zod" via the Context7 MCP (resolve-library-idquery-docs) at v4: top-level APIs, .safeParse/.parse semantics, z.output/z.input inference, discriminated unions, registries/metadata features, error customization, tree-shaking/minification notes.
  2. For anything Context7 lacks, use Firecrawl search/scrape restricted to the official domain (zod.dev) - v4 changelog/migration notes relevant to schemas in this repo.
  3. Version currency: catalog zod in pnpm-workspace.yaml and installed version vs latest stable; flag any remaining v3-only APIs (e.g. old error-map patterns) in code.
  4. Cite the retrieved source next to every finding; label anything unverifiable as Unverified.

Scope artifacts

Analysis axes

  • Single source of truth: every cross-boundary payload has exactly one owning schema in dtos-common; no shadow re-declarations in apps; enums sourced from @repo/enums-common.
  • Inference discipline: types derived via z.infer/z.output (input vs output distinction respected); no hand-written duplicate TS types drifting from schemas.
  • Boundary coverage: all Hono routes validate request/response payloads; webhook signatures verified before parsing; queue messages validated on consume.
  • Schema quality: discriminated unions over boolean flags; .strict()/.loose() choices deliberate; reusable primitives factored; no runtime-costly transforms on hot paths where a refine suffices.
  • Errors: consistent error formatting for API responses (no internal details leaked); i18n/custom messages pattern coherent with current v4 APIs.
  • Version currency: full v4 adoption (no compat shims); new capabilities worth adopting noted.

Read the full file on GitHub · 62 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. 12d ago First seen · 62 lines · 66 tokens per session scan A 14e388d3d2e2

Subscribe to this mod's changes

review-zod is a skill published in the GitHub repository louisbrulenaudet/monorepo-template (19 stars, last pushed 11d ago), licensed Apache-2.0. It adds 66 tokens to every session and 959 once invoked, about $0.0003 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 2026-08-30.

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