What is weaverkit CLAUDE.md?

Project instructions for Weaverkit, a collection of TypeScript packages for Node.js and Express applications managed together in a Lerna monorepo. A monorepo stores multiple related packages in one repository.

Use it to build all or one Weaverkit package, run tests, check code quality, format files, and prepare or publish package changes.

It gives contributors the correct commands and rules for building, testing, linting, formatting, and publishing the packages. It also explains that tests must be run from the repository root.

How iyiolapeter/weaverkit configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to iyiolapeter/weaverkit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/iyiolapeter/weaverkit/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/iyiolapeter/weaverkit

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/iyiolapeter/weaverkit/claude-md/github.svg)](https://agentmods.dev/instructions/iyiolapeter/weaverkit/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/iyiolapeter/weaverkit/claude-md"><img src="https://agentmods.dev/badge/instructions/iyiolapeter/weaverkit/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/iyiolapeter/weaverkit/claude-md"><img src="https://agentmods.dev/badge/instructions/iyiolapeter/weaverkit/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3,110 This file is loaded in full into every session.

When invoked 3,110 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.03110	$0.03110
Opus 5.5	$0.01244	$0.01244
Sonnet 5.5	$0.00622	$0.00622
Haiku 4.5	$0.00311	$0.00311

Measured 2mo ago against content hash 3372107e8a0b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

weaverkit CLAUDE.md 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 2mo 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.

CLAUDE.md · 347 lines

How it starts

The opening of the file, as written. The whole thing — 347 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Commands

# Build all packages (via lerna) then publish
npm run publish

# Build a single package
cd packages/<name> && npx tsc

# Run all tests
npm test

# Run tests in watch mode
npm run test:watch

# Run a single test file
npm test -- packages/validator/__tests__/validator.test.ts

# Lint / format
npm run lint
npm run lint:fix
npm run format

# Conventional commit helper (commitizen)
npm run commit

# Pre-publish gate: lint-staged + lint:fix + lerna build
npm run prepare:commit

Tests must always be run from the root. Individual packages intentionally throw an error if you run npm test inside them.

Architecture Overview

Weaverkit is a Lerna monorepo of scoped @weaverkit/* packages providing Express-centric utilities for TypeScript/Node.js apps (Node >= 20, CommonJS output, TypeScript 4.9.5 strict mode, decorators enabled).

Package dependency graph

@weaverkit/adapters.base (abstract)
  ├── @weaverkit/adapters.mongoose
  ├── @weaverkit/adapters.redis
  └── @weaverkit/adapters.sequelize

@weaverkit/express
  └── peerDeps: @weaverkit/data, @weaverkit/errors

@weaverkit/logger
  └── @weaverkit/utils

# Standalone (no internal deps):
@weaverkit/errors
@weaverkit/data
@weaverkit/utils
@weaverkit/validator

Package Deep-Dives

`@weaverkit/errors`

Error hierarchy rooted at abstract AppError extends Error.

Concrete classes and HTTP codes:

Class	Code	httpCode
`BadRequestError` / `InvalidArgumentError` / `InvalidActionError`	`BAD_REQUEST_ERROR` etc.	400
`UnauthorizedError`	`UNAUTHORIZED_ERROR`	401
`ForbiddenError`	`FORBIDDEN_ERROR`	403
`NotFoundError`	`NOT_FOUND_ERROR`	404
`ConflictError`	`CONFLICT_ERROR`	409
`UnprocessibleEntityError`	`UNPROCESSIBLE_ENTITY_ERROR`	422
`ValidationError` (extends above)	`INPUT_VALIDATION_ERROR`	422
`FailedDependencyError`	`FAILED_DEPENDENCY_ERROR`	424
`TooManyRequestsError`	`TOO_MANY_REQUESTS_ERROR`	429
`ServerError`	`SERVER_ERROR`	500
`NotImplementedError`	`NOT_IMPLEMENTED_ERROR`	501
`ServiceUnavailableError`	`SERVICE_UNAVAILABLE_ERROR`	503
`HttpError`	dynamic	custom code passed to constructor

Read the full file on GitHub · 347 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.

2mo ago First seen · 347 lines · 3,110 tokens per session scan A 3372107e8a0b

Subscribe to this mod's changes

weaverkit CLAUDE.md is an instructions file published in the GitHub repository iyiolapeter/weaverkit (5 stars, last pushed 3mo ago), licensed MIT. It adds 3,110 tokens to every session, about $0.0124 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 2026-08-31.

weaverkit CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
weaverkit CLAUDE.mdiyiolapeter/weaverkit	Instructions file	5	3mo ago	MIT	A	3,110	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

weaverkit: Instructions file for Claude Code