repo-tour

repo-tour is a skill for Claude Code, Codex from ntaffzii/Skill-Agents. It costs 146 tokens per session (2,768 once invoked), scanned A, original, MIT.

A codebase guide built from an existing dependency map. It creates reading tours, newcomer onboarding documents, and reports showing what a change may affect.

In plain words
What is it for?
Use it to plan where to start reading an unfamiliar codebase, prepare onboarding material, or check the likely impact of a commit or pull request. It requires graphify to have already created graphify-out/graph.json.
Why use it?
It avoids repeatedly scanning and interpreting the whole project. It also makes an existing project map useful for understanding the code and reviewing changes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Use it to plan where to start reading an unfamiliar codebase, prepare onboarding material, or check the likely impact of a commit or pull request. It requires graphify to have already created graphify-out/graph.json.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ntaffzii/skill-agents/repo-tour
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 ntaffzii/Skill-Agents --skill repo-tour
Clone the repo
git clone --depth 1 https://github.com/ntaffzii/Skill-Agents

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 repo-tour

README.md
[![agentmods](https://agentmods.dev/badge/skills/ntaffzii/skill-agents/repo-tour/github.svg)](https://agentmods.dev/skills/ntaffzii/skill-agents/repo-tour)
Your own site
<a href="https://agentmods.dev/skills/ntaffzii/skill-agents/repo-tour"><img src="https://agentmods.dev/badge/skills/ntaffzii/skill-agents/repo-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.

agentmods 80×15 button for repo-tour

Your own site · 80×15
<a href="https://agentmods.dev/skills/ntaffzii/skill-agents/repo-tour"><img src="https://agentmods.dev/badge/skills/ntaffzii/skill-agents/repo-tour.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 146 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,768 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 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00146 $0.02768
Opus 5 $0.00073 $0.01384
Sonnet 5 $0.00029 $0.00554
Haiku 4.5 $0.00015 $0.00277

Measured 11d ago against content hash c5e2b9ff3a3e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

repo-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 11d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (build_onboarding.py, build_tour.py, diff_impact.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.

skills/research/repo-tour/SKILL.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repo Tour (reads an existing graphify graph)

Overview

graphify already builds a persistent knowledge graph (graphify-out/graph.json) from a codebase — that's the expensive, token-hungry part, and it's already solved. What's missing is three specific consumption modes: a dependency-ordered reading tour, an onboarding doc, and a diff-impact report. This skill supplies those three by reading the existing graph, not by re-scanning the repo — cheap, fast, and doesn't duplicate graphify's own extraction pipeline.

Fast-path rule (check this first, every time): if graphify-out/graph.json does not exist, stop and tell the user to run graphify first (/graphify or the graphify skill). Do not fall back to reading files manually — that's project-discovery's job, not this skill's.

Cost note before suggesting a graphify run: repo-tour itself makes no LLM calls and costs nothing to run. Building the graph in the first place is not free, though — graphify's semantic extraction pass (anything that isn't code: .md, .pdf, images) dispatches an LLM subagent per ~20-25 files, and a real test run in this repo (10 small Markdown files) used ~116k output tokens for that one pass. If no graph exists yet and the corpus is doc-heavy or large, say so explicitly and let the user decide whether to scope the graphify run narrower (a subdirectory, not the whole repo) rather than defaulting to a full-repo build. For a genuine one-off "explain this to me" question with no existing graph and no repeat use planned, project-discovery is usually cheaper — repo-tour's value shows up when a graph already exists (regular graphify use) or the same graph gets reused across multiple onboarding/diff-impact checks, not on a single cold-start question.

When to use

  • สร้างเอกสาร onboarding สำหรับทีมใหม่ จากกราฟที่ graphify สร้างไว้แล้ว
  • สร้างลำดับการอ่านโค้ดที่แนะนำ (จากโมดูลพื้นฐานไปหาโมดูลที่พึ่งพามัน)
  • เช็คว่า diff/PR ปัจจุบันกระทบส่วนไหนของระบบบ้าง ก่อน commit
  • Any request to "explain this repo to a new person" or "what breaks if I change X" when a graph already exists

Read the full file on GitHub · 100 lines

Files

What ships with it

4 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. 11d ago First seen · 100 lines · 146 tokens per session scan A c5e2b9ff3a3e

Subscribe to this mod's changes

repo-tour is a skill published in the GitHub repository ntaffzii/Skill-Agents (4 stars, last pushed 3d ago), licensed MIT. It adds 146 tokens to every session and 2,768 once invoked, about $0.0007 per session on Opus 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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