learn-codebase

learn-codebase is a skill for Claude Code from magnusrodseth/dotfiles. It costs 59 tokens per session (995 once invoked), scanned A, original, no licence file.

A code-reading guide for understanding how a software project works from its actual source code, either online or on your computer.

In plain words
What is it for?
Use it to investigate existing code, learn an organisation's coding conventions, or trace how two parts of a project are connected.
Why use it?
It helps answer how a feature really works, including project-specific patterns and how parts connect, instead of relying on assumptions or general documentation.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to investigate existing code, learn an organisation's coding conventions, or trace how two parts of a project are connected.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/magnusrodseth/dotfiles/learn-codebase
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 magnusrodseth/dotfiles --skill learn-codebase
Clone the repo
git clone --depth 1 https://github.com/magnusrodseth/dotfiles

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 learn-codebase

README.md
[![agentmods](https://agentmods.dev/badge/skills/magnusrodseth/dotfiles/learn-codebase/github.svg)](https://agentmods.dev/skills/magnusrodseth/dotfiles/learn-codebase)
Your own site
<a href="https://agentmods.dev/skills/magnusrodseth/dotfiles/learn-codebase"><img src="https://agentmods.dev/badge/skills/magnusrodseth/dotfiles/learn-codebase/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 learn-codebase

Your own site · 80×15
<a href="https://agentmods.dev/skills/magnusrodseth/dotfiles/learn-codebase"><img src="https://agentmods.dev/badge/skills/magnusrodseth/dotfiles/learn-codebase.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 995 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 $0.00059 $0.00995
Opus 5.5 $0.00024 $0.00398
Sonnet 5.5 $0.00012 $0.00199
Haiku 4.5 $0.00006 $0.00100

Measured 1mo ago against content hash dcb34937c2c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

learn-codebase 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.

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/learn-codebase/SKILL.md · 82 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 · 82 lines · 59 tokens per session scan A dcb34937c2c3

Subscribe to this mod's changes

learn-codebase is a skill published in the GitHub repository magnusrodseth/dotfiles (3 stars, last pushed 4d ago), with no licence file. It adds 59 tokens to every session and 995 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 2026-08-31.

Related

Other skills, from other repositories

batch-grill-me

A relentless interview that asks every frontier question at once, round by round.

M0rtalPhe0nix/dotfiles · 20 tokens

astro-dso-doc

Bootstraps a deep-sky object (DSO) astrophotography project from raw acquisition frames (own rig, not a smart telescope), AND generates a complete, polished HTML documentation page, a processing checklist, an AstroBin post JSON, a PixInsight process icon set (XPSM), and a ready-to-paste PixInsight project Description…

jjmartres/ai-coding-agents · 311 tokens

document-code

Apply Google Style documentation standards to Python, Go, TypeScript, and Terraform code. Use when writing or reviewing code that needs docstrings/comments/JSDoc, when asked to "document this code", "add docstrings", "follow Google Style", or when improving code documentation quality. Supports Python docstrings, Go…

jjmartres/ai-coding-agents · 88 tokens

work-on-ticket

Fetches Jira ticket details, creates an appropriately named branch, and initiates the task planning workflow. Use when the user says "work on [TICKETID]" or similar phrases.

jjmartres/ai-coding-agents · 41 tokens

datadog

Use this skill when you need to search Datadog logs, query metrics, tail logs in real-time, trace distributed requests, investigate errors, compare time periods, find log patterns, check service health, or export observability data.

jjmartres/ai-coding-agents · 51 tokens

modern-css

Specialized knowledge for writing modern high-quality CSS. Trigger this skill when starting a new CSS project/file, when the user asks about new CSS features (e.g. Masonry, View Transitions, Container Queries, Scroll-driven animations), or requests refactoring of legacy styles to modern standards.

paulirish/dotfiles · 61 tokens