A tool for creating ordered, annotated walkthroughs of an unfamiliar codebase. The walkthroughs link explanations to code locations and keep those links up to date.

Use it for onboarding, service handoffs, and explaining a subsystem before a code review.

It gives new engineers and reviewers a clear path through a system instead of requiring them to discover the structure on their own. It also reduces the problem of explanations pointing to changed code.

code-tour — Skill for Claude Code by borghei/Claude-Skills

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 borghei/Claude-Skills --skill code-tour

Clone the repo

git clone --depth 1 https://github.com/borghei/Claude-Skills

Made for: Claude Code.

Or install engineering-advanced-skills, the plugin that ships this one along with the rest of its 74 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/borghei/claude-skills/code-tour/github.svg)](https://agentmods.dev/skills/borghei/claude-skills/code-tour)

Your own site

<a href="https://agentmods.dev/skills/borghei/claude-skills/code-tour"><img src="https://agentmods.dev/badge/skills/borghei/claude-skills/code-tour/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/skills/borghei/claude-skills/code-tour"><img src="https://agentmods.dev/badge/skills/borghei/claude-skills/code-tour.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,834 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.

Model	Per session	Once invoked
Fable 5.1	$0.00040	$0.02834
Opus 5.5	$0.00016	$0.01134
Sonnet 5.5	$0.00008	$0.00567
Haiku 4.5	$0.00004	$0.00283

Measured 28d ago against content hash b8d1d101a7fc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

code-tour 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 28d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/tour_propose.py, scripts/tour_render.py, scripts/tour_validate.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.

engineering/code-tour/SKILL.md · 207 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

7 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.

28d ago First seen · 207 lines · 40 tokens per session scan A b8d1d101a7fc

Subscribe to this mod's changes

code-tour is a skill published in the GitHub repository borghei/Claude-Skills (949 stars, last pushed 13d ago), with no licence file. It adds 40 tokens to every session and 2,834 once invoked, about $0.0002 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 2026-09-22.

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