What is vertz CLAUDE.md?

A set of instructions for working on Vertz, a full-stack TypeScript framework with database, server, user-interface, and AI-agent tools. It covers both TypeScript and Rust parts of the framework.

Use it when developing or maintaining the vertz-dev/vertz framework, including its packages, native Rust code, database, APIs, and UI.

It gives the coding agent the project’s architecture, tools, conventions, and design rules so changes fit the existing codebase.

How vertz-dev/vertz configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to vertz-dev/vertz. 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/vertz-dev/vertz/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/vertz-dev/vertz

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/vertz-dev/vertz/claude-md/github.svg)](https://agentmods.dev/instructions/vertz-dev/vertz/claude-md)

Your own site

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

Per session 923 This file is loaded in full into every session.

When invoked 923 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	$0.00923	$0.00923
Opus 5.5	$0.00369	$0.00369
Sonnet 5.5	$0.00185	$0.00185
Haiku 4.5	$0.00092	$0.00092

Measured 1mo ago against content hash c3a008869b32, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

vertz 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 1mo 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 · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Vertz Framework

What is Vertz?

Vertz is a full-stack TypeScript framework. It includes:

Database ORM (@vertz/db) — typed queries, migrations, PostgreSQL + SQLite + D1
API server (@vertz/server) — entities, services, REST endpoints, auto-generated OpenAPI
Compiled UI (@vertz/ui) — signals, JSX, router, SSR, forms, scoped CSS
AI agents (@vertz/agents) — agents, typed tools, workflows on Cloudflare Workers
Custom runtime & CLI (vtz) — Rust-powered dev server, build, test runner

One schema definition (d.table()) drives the database, API types, client SDK, and UI — if it builds, it works.

Read VISION.md and MANIFESTO.md before making any design decision. Every API, architecture choice, and implementation approach must align with the 8 principles in the vision.

Stack

TypeScript (packages/)

Runtime: vtz
Language: TypeScript (strict mode)
Linter: oxlint
Formatter: oxfmt
Test runner: vtz test
Monorepo: vtz workspaces under packages/

Rust (native/)

Language: Rust (2021 edition)
Linter: clippy
Formatter: rustfmt
Test runner: cargo test
Async runtime: Tokio
JS engine: V8 via deno_core
HTTP server: axum
Cargo workspace under native/

Development

TypeScript

vtz run build        # Build all packages
vtz test             # Run tests
vtz run typecheck    # TypeScript strict checking
vtz run lint         # oxlint check
vtz run lint:fix     # Auto-fix lint issues
vtz run format       # oxfmt format check
vtz run format:fix   # Auto-fix formatting

Rust

cd native
cargo test --all           # Run all tests
cargo clippy --all-targets -- -D warnings  # Lint
cargo fmt --all -- --check # Format check
cargo fmt --all            # Auto-format
cargo build --release      # Release build (CI/deploy only, NOT for dev quality gates)

Never use --release for clippy or quality gates during development. Release builds are significantly slower and only needed for CI pipelines and final deployment. Debug mode catches the same lint issues.

Read the full file on GitHub · 98 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.

1mo ago First seen · 98 lines · 923 tokens per session scan A c3a008869b32

Subscribe to this mod's changes

vertz CLAUDE.md is an instructions file published in the GitHub repository vertz-dev/vertz (45 stars, last pushed 6mo ago), licensed MIT. It adds 923 tokens to every session, about $0.0037 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 2026-09-01.

Backend and APIs Frontend LLM claude framework

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

vertz: Instructions file for Claude Code