claude-code-training-lab: Skill for Claude Code

.claude/skills/codebase-visualizer/SKILL.md

codebase-visualizer is a skill for Claude Code from lodetomasi/claude-code-training-lab. It costs 28 tokens per session (411 once invoked), scanned A, original, no licence file.

A project-structure viewer that creates a visual tree of a codebase, including file sizes and dependency information. A dependency is another package or project component that code relies on.

In plain words
What is it for?
Onboarding to an unfamiliar codebase and reviewing its architecture, file layout, sizes, and dependencies.
Why use it?
It gives newcomers and reviewers a quick picture of how a project is organised, so they do not have to inspect every folder and file manually.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

This is lodetomasi/claude-code-training-lab's own configuration. It tells Claude Code how to work on claude-code-training-lab itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything claude-code-training-lab configures →

Reuse

Borrowing it

Nothing to install: this file belongs to lodetomasi/claude-code-training-lab. 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/lodetomasi/claude-code-training-lab/main/.claude/skills/codebase-visualizer/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/lodetomasi/claude-code-training-lab

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.

agentmods badge for codebase-visualizer

README.md
[![agentmods](https://agentmods.dev/badge/skills/lodetomasi/claude-code-training-lab/codebase-visualizer/github.svg)](https://agentmods.dev/skills/lodetomasi/claude-code-training-lab/codebase-visualizer)
Your own site
<a href="https://agentmods.dev/skills/lodetomasi/claude-code-training-lab/codebase-visualizer"><img src="https://agentmods.dev/badge/skills/lodetomasi/claude-code-training-lab/codebase-visualizer/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 codebase-visualizer

Your own site · 80×15
<a href="https://agentmods.dev/skills/lodetomasi/claude-code-training-lab/codebase-visualizer"><img src="https://agentmods.dev/badge/skills/lodetomasi/claude-code-training-lab/codebase-visualizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 411 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 unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00028 $0.00411
Opus 5.5 $0.00011 $0.00164
Sonnet 5.5 $0.00006 $0.00082
Haiku 4.5 $0.00003 $0.00041

Measured 1mo ago against content hash 4a04ad5e61bf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codebase-visualizer 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/visualize.py), 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.

.claude/skills/codebase-visualizer/SKILL.md · 49 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file 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. 1mo ago First seen · 49 lines · 28 tokens per session scan A 4a04ad5e61bf

Subscribe to this mod's changes

codebase-visualizer is a skill published in the GitHub repository lodetomasi/claude-code-training-lab (2 stars, last pushed 8mo ago), with no licence file. It adds 28 tokens to every session and 411 once invoked, about $0.0001 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.

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