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This wiki has two parts. One part is about claudetto, a plugin marketplace for Claude Code. The other part is a reference of how Claude Code 2.1.303 works. You can read each part alone.

claudetto 0.2.0+

claudetto is a plugin marketplace for software engineering with Claude Code. It changes Claude Code with the Mod API, settings, hooks, skills, agents, and output styles. It does not patch the program. Its goal is the best quality for the lowest token cost. claudetto needs Claude Code 2.1.303 or later.

For example, the Guard slice denies a risky command before Claude Code runs it.

Start Here

• Overview: what each plugin and each feature is.
• Install: add the marketplace and the plugins.
• Quickstart: see what happens in a first session.
• Troubleshooting: fix a symptom.
• Architecture: how the core plugin is built.

Slices

The core plugin has 15 slices, and each slice has one page: Advise, Decide, Dry, Goal, Ground, Guard, Handoff, Patch, Prompt, Reply, Sembr, Setup, Spec, Status Line, and Styles.

Add-Ons

Each add-on is a separate plugin, and it works without the core plugin.

Plugin	What it does	Page
claudetto-codegraph	Gives Claude the code graph of a project.	Code Graph
claudetto-browser	Drives a browser, and answers WebSearch with a headless search.	Browser
claudetto-docs	Gets current docs of libraries and APIs.	Library Docs
claudetto-sessions	Audits the setup and replays a hook on past transcripts.	Sessions
claudetto-lab	Gives tools for plugin authors.	Lab

The marketplace is on Add-Ons.

More Pages

Page	What it holds
Settings Snippet	The keys that Claude Code needs.
Bounds	The limits of the runtime, the slices, and the add-ons.
Design and Decisions	The design principles, and why each is in force.
Evidence and Evals	The measured facts, and what the evals measure.
Development and Sandbox	How to change claudetto and test a checkout.
Attributions	The projects whose ideas claudetto reimplements.
Release History	Where the notes of each release are.

How Claude Code 2.1.303 Works

This part is a reference of Claude Code 2.1.303, the newest release on 2026-10-19. It tells how a turn runs, which settings, hooks, tools, and env vars exist, and how to change each one. It also lists the items that the official docs do not name. Each fact names its source: a docs page, or the program itself.

For example, Claude Code Hooks lists each hook event with its input and its output.

Marks

Each row in a table has one mark.

Mark	Meaning
✅	A page of the official docs names the item.
🔍	No docs page names the item, and it is found only in the program.
⚠️	The docs and the program differ.
🧪	The item works only behind a flag or a gate.
❌	The item is removed or does nothing in 2.1.303.

A yes or no value in a table is ✅ or ❌.

Start Here

• Claude Code: the index, the version, and how to read this part.
• Claude Code Turn Pipeline: the steps from a prompt to the final answer.
• Claude Code Settings: each key of settings.json.
• Claude Code Hooks: each hook event, input, and output.
• Claude Code Tools: each built-in tool.
• Claude Code Mod API: the API that a plugin uses to change Claude Code.
• Claude Code Env Vars: each env var.
• Claude Code Undocumented: the items that the docs do not name.

Sources

The CHANGELOG at GitHub lists each release of claudetto.