zod-schema-discipline SKILL.md skillA
zod-schema-discipline from kamiazya/whiteboard is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add kamiazya/whiteboard/zod-schema-discipline@git:20261016.bbfc32dPins git:20261016.bbfc32d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- kamiazya/whiteboard
- Path
.claude/skills/zod-schema-discipline/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261016.bbfc32d, committed Oct 16, 2026
- First version recorded
- Jun 15, 2026
- Size
- 3,141 bytes
- Repository stars
- 10
- License
- Apache-2.0
How to keep Zod as the single source of truth for any contract that crosses a process boundary in the whiteboard repo (MCP tool input/output, Hono routes, persisted JSON, daemon payloads and sync frames). Use when adding or editing an MCP tool, a route response, or a persisted-JSON parser, or when fixing a schema-vs-runtime drift. Covers the create_frame bug pattern and the mutation-check recipe.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Zod Schema Discipline
Zod is the **single source of truth** for every contract that crosses a process boundary. A schema and a separately hand-written TypeScript type that travel together WILL drift — one side changes, the type-check passes, and only the runtime validator (or nothing) catches it.
## The failure pattern (avoid)
A Zod schema declared once, plus a hand-written `interface`/return type describing the same shape:
```ts
export const xxxOutputSchema = z.object({ assignedMembers: z.array(z.string()) })
export interface Xxx { assignedMembers: number } // drifts silently — shipped the create_frame bug
execute: async (...): Promise<Xxx> => ...
```
## The rule
Derive the type FROM the schema; never write it twice.
```ts
export const xxxOutputSchema = z.object({ ... })
export type Xxx = z.infer<typeof xxxOutputSchema>
// or annotate the handler directly:
execute: async (...): Promise<z.infer<typeof xxxOutputSchema>> => ...
```
Concrete rules:
…Read the whole file at its exact version.
How to install
mdr add kamiazya/whiteboard/zod-schema-discipline@sha256:bd185497edde47b0The line at the top of this page pins the label git:20261016.bbfc32d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_7ccdi5tmyaie642m)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jun 15, 2026 and Oct 16, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.bbfc32d latest | 2026-10-16 | bbfc32d | 3,141 B | A | view · diff |
| git:20261002.3e13332 | 2026-10-02 | 3e13332 | 3,135 B | A | view · diff |
| git:20260909.55990d9 | 2026-09-09 | 55990d9 | 3,115 B | A | view · diff |
| git:20260812.522d634 | 2026-08-12 | 522d634 | 2,793 B | A | view · diff |
| git:20260615.5a9e01c | 2026-06-15 | 5a9e01c | 2,787 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3141 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
kamiazya/whiteboard · 10 stars · license Apache-2.0 · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7ccdi5tmyaie642m GET https://markdownregistry.com/api/v1/resolve?ref=kamiazya/whiteboard/zod-schema-discipline GET https://markdownregistry.com/api/v1/blob/bd185497edde47b09c5892eb117f3ab4ba8ea39f5f5b5b84dba8a44c318f60c3
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.