setup-ts-deep-modules

setup-ts-deep-modules is a skill for Claude Code, Codex from FradSer/dotclaude. It costs 54 tokens per session (1,837 once invoked), scanned A, a copy of setup-ts-deep-modules, MIT.

A setup workflow that adds dependency-cruiser rules to a TypeScript repository so each package exposes only its root entry-point files. Dependency-cruiser is a tool that checks how files depend on one another.

In plain words
What is it for?
Use it to install and configure dependency-cruiser, enforce deep-module boundaries, and verify that imports must go through package entry points.
Why use it?
It prevents code outside a package from importing hidden implementation files or tests directly. This keeps a package's public interface small and its internal folders private.

Skill for Claude CodeCodex

Written for Claude Code and Codex: disable-model-invocation in frontmatter, but also agents/openai.yaml present. Also seen: mentions CLAUDE.md; positional $N argument; mentions AGENTS.md.

Part of the mattpocock plugin — 46 skills shipped together

Good fit Use it to install and configure dependency-cruiser, enforce deep-module boundaries, and verify that imports must go through package entry points.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fradser/dotclaude/setup-ts-deep-modules
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 FradSer/dotclaude --skill setup-ts-deep-modules
Clone the repo
git clone --depth 1 https://github.com/FradSer/dotclaude

Made for: Claude Code, Codex.

Or install mattpocock, the plugin that ships this one along with the rest of its 46 skills.

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 setup-ts-deep-modules

README.md
[![agentmods](https://agentmods.dev/badge/skills/fradser/dotclaude/setup-ts-deep-modules/github.svg)](https://agentmods.dev/skills/fradser/dotclaude/setup-ts-deep-modules)
Your own site
<a href="https://agentmods.dev/skills/fradser/dotclaude/setup-ts-deep-modules"><img src="https://agentmods.dev/badge/skills/fradser/dotclaude/setup-ts-deep-modules/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 setup-ts-deep-modules

Your own site · 80×15
<a href="https://agentmods.dev/skills/fradser/dotclaude/setup-ts-deep-modules"><img src="https://agentmods.dev/badge/skills/fradser/dotclaude/setup-ts-deep-modules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,837 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 92% copy Near-identical to another mod 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 $0.00054 $0.01837
Opus 5.5 $0.00022 $0.00735
Sonnet 5.5 $0.00011 $0.00367
Haiku 4.5 $0.00005 $0.00184

Measured 23d ago against content hash 484c008e9a5a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

setup-ts-deep-modules 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 23d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (dependency-cruiser.config.cjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

92% identical to setup-ts-deep-modules — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

mattpocock/skills/in-progress/setup-ts-deep-modules/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Setup TS Deep Modules

Make every package in this repo a deep module: a lot of behaviour behind a small interface. A package's public surface is its entry points (the files at the package root), and everything in its subfolders is hidden. This skill installs dependency-cruiser and the rules that make the entry points the only way in, then proves the rules bite.

For the vocabulary (deep module, interface, seam, depth), call the Skill tool with "mattpocock:codebase-design" and use its language throughout.

The shape this enforces

src/packages/
  <name>/
    index.ts        ← an entry point (public). Import this from outside.
    client.ts       ← another entry point. Packages may expose SEVERAL.
    lib/            ← implementation: hidden from outside, free to import each other.
    tests/          ← co-located tests + fixtures (a subfolder, so private).

The public surface is the package's root files, not one designated index.ts. By convention implementation lives in lib/ and tests in tests/, giving every package the same two-folder shape. The rule itself is general, though: anything in any subfolder is private, so you never extend the config to add a folder.

Four rules, all error:

  1. Entry-point boundary: code outside a package (app code or another package) may import only that package's entry points (its root files), never anything in its subfolders.
  2. Intra-package freedom: a package's own files import each other freely.
  3. Tests through the entry points: files under <pkg>/tests/ may import any package's entry points and their own tests/ fixtures, but never any package's subfolder internals (not even their own). Integration tests across packages are fine; deep imports are not.
  4. No cycles: no dependency cycles.

Entry points, not a barrel. Because the public surface is every root file, a package can expose several small entry points (index.ts, client.ts, server.ts) instead of funnelling everything through one giant index.ts. Barrel files that re-export a whole subtree are discouraged; keep entry points small and hide implementation in subfolders.

Read the full file on GitHub · 103 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 23d ago First seen · 103 lines · 54 tokens per session scan A 484c008e9a5a

Subscribe to this mod's changes

setup-ts-deep-modules is a skill published in the GitHub repository FradSer/dotclaude (594 stars, last pushed 8d ago), licensed MIT. It adds 54 tokens to every session and 1,837 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to setup-ts-deep-modules, differing in 4 lines, and is treated as a copy.

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