code-tour

code-tour is a skill for Claude Code, Codex from gongyijie85/dsh-ecc. It costs 78 tokens per session (1,993 once invoked), scanned A, a copy of code-tour, MIT.

A guided codebase walkthrough saved as a CodeTour file. It links a reader's step-by-step path to real files and line ranges.

In plain words
What is it for?
Use it for onboarding, architecture explanations, pull-request reviews, root-cause investigations, or security reviews.
Why use it?
It gives new developers or reviewers a clear route through unfamiliar code instead of a disconnected prose explanation.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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.

agentmods
npx agentmods add skills/gongyijie85/dsh-ecc/code-tour
Any agent
npx skills add gongyijie85/dsh-ecc --skill code-tour
Clone the repo
git clone --depth 1 https://github.com/gongyijie85/dsh-ecc

Made for: Claude Code, Codex.

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 code-tour

README.md
[![agentmods](https://agentmods.dev/badge/skills/gongyijie85/dsh-ecc/code-tour.svg)](https://agentmods.dev/skills/gongyijie85/dsh-ecc/code-tour)
Your own site
<a href="https://agentmods.dev/skills/gongyijie85/dsh-ecc/code-tour"><img src="https://agentmods.dev/badge/skills/gongyijie85/dsh-ecc/code-tour.svg" alt="Measured on agentmods" height="20"></a>
Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,993 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 94% 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 $0.00078 $0.01993
Opus 5 $0.00039 $0.00996
Sonnet 5 $0.00016 $0.00399
Haiku 4.5 $0.00008 $0.00199

Measured 6d ago against content hash 416c7eb92295, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 6d 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.

Origin

This is a copy

94% identical to code-tour — 26 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.

skills/code-tour/SKILL.md · 255 lines

How it starts

The opening of the file, as written. The whole thing — 255 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Tour

Create CodeTour .tour files for codebase walkthroughs that open directly to real files and line ranges. Tours live in .tours/ and are meant for the CodeTour format, not ad hoc Markdown notes.

A good tour is a narrative for a specific reader:

  • what they are looking at
  • why it matters
  • what path they should follow next

Only create .tour JSON files. Do not modify source code as part of this skill.

When to Use

Use this skill when:

  • the user asks for a code tour, onboarding tour, architecture walkthrough, or PR tour
  • the user says "explain how X works" and wants a reusable guided artifact
  • the user wants a ramp-up path for a new engineer or reviewer
  • the task is better served by a guided sequence than a flat summary

Examples:

  • onboarding a new maintainer
  • architecture tour for one service or package
  • PR-review walk-through anchored to changed files
  • RCA tour showing the failure path
  • security review tour of trust boundaries and key checks

When NOT to Use

Instead of code-tour Use
A one-off explanation in chat is enough answer directly
The user wants prose docs, not a .tour artifact documentation-lookup or repo docs editing
The task is implementation or refactoring do the implementation work
The task is broad codebase onboarding without a tour artifact codebase-onboarding

Workflow

1. Discover

Explore the repo before writing anything:

  • README and package/app entry points
  • folder structure
  • relevant config files
  • the changed files if the tour is PR-focused

Do not start writing steps before you understand the shape of the code.

2. Infer the reader

Decide the persona and depth from the request.

Request shape Persona Suggested depth
"onboarding", "new joiner" new-joiner 9-13 steps
"quick tour", "vibe check" vibecoder 5-8 steps
"architecture" architect 14-18 steps
"tour this PR" pr-reviewer 7-11 steps
"why did this break" rca-investigator 7-11 steps
"security review" security-reviewer 7-11 steps
"explain how this feature works" feature-explainer 7-11 steps
"debug this path" bug-fixer 7-11 steps

Read the full file on GitHub · 255 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.

  1. 6d ago First seen · 255 lines · 78 tokens per session scan A 416c7eb92295

Subscribe to this mod's changes

code-tour is a skill published in the GitHub repository gongyijie85/dsh-ecc (6 stars, last pushed yesterday), licensed MIT. It adds 78 tokens to every session and 1,993 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to code-tour, differing in 26 lines, and is treated as a copy.

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