pikkujs/pikku-schema-cfworker
packages/cli/skills/pikku-schema-cfworker/SKILL.md
Use when setting up JSON schema validation for Cloudflare Workers in a Pikku app. Covers CFWorkerSchemaService as a lightweight alternative to AJV. TRIGGER when: code uses CFWorkerSchemaService, user asks about schema validation on Cloudflare Workers, or @pikku/schema-cfworker. DO NOT TRIGGER when: user asks about AJV schema validation (use pikku-schema-ajv).
$ install --global
skillsauthnpx skillsauth add pikkujs/pikku pikku-schema-cfworkerInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Jun 4, 2026, 6:08 AM155.5s1 file scanned
SKILL.md
- name:
- pikku-schema-cfworker
- description:
- Use when setting up JSON schema validation for Cloudflare Workers in a Pikku app. Covers CFWorkerSchemaService as a lightweight alternative to AJV.
- TRIGGER when:
- code uses CFWorkerSchemaService, user asks about schema validation on Cloudflare Workers, or @pikku/schema-cfworker.
- DO NOT TRIGGER when:
- user asks about AJV schema validation (use pikku-schema-ajv).
- installGroups:
- [core, fabric]
Pikku Schema CFWorker (Cloudflare Workers Validation)
Agent Operating Procedure
Use this skill as an execution checklist, not reference material.
- Discover before editing. Prefer OpenCode tools such as
pikku-metawhen available; otherwise run the relevantpikku meta ... --jsoncommand and inspect only the focused output you need. - Identify the source files that own the behavior. Do not start by reading generated output,
.pikku,node_modules, vendored packages, or broad build artifacts. - Make the smallest source change that satisfies the task. Keep generated files generated, and avoid hand-editing SDKs, schema output, or typegen.
- Validate with the narrowest relevant command first, then run
pikku-verifyorpikku allwhen functions, wirings, schemas, or generated clients may have changed. - If validation fails, fix the source cause and rerun validation. Do not paper over generated errors by editing generated files.
@pikku/schema-cfworker provides JSON schema validation using @cfworker/json-schema, a lightweight validator compatible with Cloudflare Workers (no eval or new Function). Implements the SchemaService interface from @pikku/core.
Installation
yarn add @pikku/schema-cfworker
API Reference
CFWorkerSchemaService
import { CFWorkerSchemaService } from '@pikku/schema-cfworker'
const schema = new CFWorkerSchemaService(logger: Logger)
Methods:
compileSchema(schema: string, value: any): void— Compile and register a JSON schemavalidateSchema(schemaName: string, json: any): void— Validate data against a compiled schema (throws on failure)getSchemaNames(): Set<string>— Get all registered schema namesgetSchemaKeys(schemaName: string): string[]— Get property keys for a schema
Usage Patterns
With Cloudflare Workers
import { CFWorkerSchemaService } from '@pikku/schema-cfworker'
const createSingletonServices = pikkuServices(async (config) => {
const logger = new ConsoleLogger()
const schema = new CFWorkerSchemaService(logger)
return { config, logger, schema }
})
Use this instead of @pikku/schema-ajv when deploying to Cloudflare Workers, as AJV uses eval which is not permitted in the Workers runtime.
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