AI-First
Claude Code mods are plugins that run inside the tool and change how it looks or behaves: a panel showing how full the context is, a confirmation prompt before a deletion, an extra button. Anthropic launched them on 1 October 2026, and I've already had teams I train install a few. My take fits in one line: a well-chosen mod takes minutes to set up, a poorly chosen one adds noise to a tool that was working fine.
- 🔑 Simple definition: a mod is a plugin that changes Claude Code from the inside.
- 🚀 No-code creation: you describe the mod in plain English, Claude writes and installs it.
- ⚠️ Real risk: a mod can read, write and call the network, so check its permissions.
- 🎯 First pick: start with a cost counter or a guard before deletions.
This article answers three questions in order: what a mod is, which ones are worth installing, and how to build one without writing code. It ends with a verdict: which mods a small business should use, and which to skip.
What exactly is a Claude Code mod?
A Claude Code mod is a plugin made of JavaScript or TypeScript functions that the tool calls when an event occurs: a tool call, a message being sent, a piece of the interface being drawn. According to the official documentation on code.claude.com, the function can observe the event, modify it or take it over entirely.
How is a mod different from a skill or an MCP connector?
A skill tells Claude how to do a task; a connector plugs it into another application. Both work from the outside. A mod runs inside Claude Code itself, so it can draw a side panel, a band above the prompt, buttons, or block a tool call before it goes out. Jay E (RoboNuggets) and Tristen O'Brien draw the same distinction in their videos.
The documentation also notes that Claude Code's classic "hooks", configured in a settings file, remain shell commands or HTTP requests. A mod's functions, by contrast, run in-process.
How does a mod work, and where does it run?
A mod is still a plugin: a plugin.json, a hooks.json, plus an extra modules key pointing to a TypeScript file. According to the official video from the Claude channel, each function receives three things: a $ object for talking to Claude Code, the event itself, and next, which hands control back to the default behaviour. If the function doesn't call next and returns its own response, it replaces the action. Express developers will recognise the middleware pattern.
On compatibility, mods require Claude Code 2.1.287 or later, are enabled by default, and run in the terminal and in the Code tab of the desktop app. At the time the videos were recorded, the VS Code extension didn't support them yet.
A mod is a piece of Claude Code you rewrite to fit your needs.
Which mods should you install first?
The most useful mods for non-developers are the ones that make Claude Code's activity visible (cost, context, files touched) or that stop it from doing something stupid (deletions, deployments). The decorative ones come later. The community catalogue awesome-claude-code-mods listed 2,692 mods as of 6 October 2026 and classifies their permissions, while claudemod.com showed 172.
Which mods come up most often in user feedback?
Here are the ones mentioned in the videos and on Reddit, with what they do and who they're for.
| Mod | What it does | Who it's for | Watch out for |
|---|---|---|---|
| Context gauge | Shows context usage in real time | Any regular user | Nothing, read-only |
| Cost counter | Shows the session cost above the prompt | Teams on a subscription or the API | Can discourage use |
| Deletion guard | Asks for confirmation before rm -rf, force-push, DROP TABLE |
Non-developers especially | Tune it so it doesn't block everything |
| Undoable recycle bin | Sends deletions to the recycle bin | Managers who handle files | Check disk permissions |
| Clean View | Hides scrolling code, keeps the task list | Business users | Less detail for debugging |
| Next steps | Suggests three actions after each reply | Users working in a flow | Can get noisy |
SOURCE: cited YouTube transcripts and Reddit discussions · UPDATED 10/2026
In his demo, Charlie Hills (MarTech AI newsletter, 4 October 2026) asked for a simple deletion of three files: everything went to the recycle bin with an undo option, and the mod recovered 8 real files for him. On r/ClaudeCode, one user recommends starting with the cost counter, at the risk of "panicking" when you see the spend. Another describes a guard mod that asks for confirmation before any commit, push or deployment, and masks API keys in the output.
What does Anthropic ship out of the box?
Anthropic bundles four mods with Claude Code, with source code published in the anthropics/claude-code repository: sec-default (protects an organisation's rules from installed plugins), diff (a /diff command that shows uncommitted changes in a panel), telemetry and agents-md (reads the AGENTS.md file as project instructions).
A fifth, "You should know", is disabled by default. A second Claude watches the first and flags what it missed. Charlie Hills enables it with /plugin enable cc-plugin-you-should-know@builtin, and notes that it only works if you share your usage data with Anthropic.
That last point deserves your attention as a business owner. A convenience gain that requires sharing data calls for a deliberate decision, not a reflex click.
How do you build a Claude Code mod without writing a line of code?
You build a Claude Code mod by describing it to Claude in plain language, then letting the tool write the plugin, install it and test it. Jay E (RoboNuggets) sums it up: "just ask Claude". Nate Herk does the same for his "next steps" mod: he pastes the mod's link into the conversation and says "set up this mod". Thirty seconds later, the suggestions appear.
Which mod ideas are worth building?
Charlie Hills suggests five questions before you start, and a "no" to any of them means you should pass: do you ask for it every day, can you see it without typing a command, does it run on its own, can you read it at a glance, does it keep your keys hidden?
I apply this filter as-is with small businesses. A mod that doesn't meet a daily need gets uninstalled within a week.
What steps should you follow for your first one?
Here's the sequence I have in mind for an afternoon, drawn from the demos I've watched.
- Update with
claude updateand check that you're on version 2.1.287 or later. - Pick a single need, for example seeing the cost or protecting deletions.
- Describe it to Claude in one sentence, including where to display it (above the prompt, in a side panel).
- Have the generated code audited: ask Claude to list what the mod reads, writes and sends over the network.
- Install it via
/plugin, test it on a harmless folder, then keep it or remove it.
I haven't timed this sequence myself on a client project, so I won't promise you a duration. What the videos do show is a first visible result within minutes, which fits my conviction: a small, measurable use case beats a big project.
Should you use a mod or stick with a simple CLAUDE.md file?
When the rule boils down to an instruction ("ask before deleting"), a CLAUDE.md file is enough, though the model may forget it. When you want a technical guarantee (the call stays blocked until you answer), the mod wins, because it intercepts the action before it runs. For the other customisation levers, my article on the 12 Claude Code features covers the basics.
"My prediction: mods are the new skills. People slept on skills for months before they took off."
Boris Cherny, head of Claude Code, quoted by Charlie Hills, October 2026
What risks should you know about before installing a mod?
A mod runs with Claude Code's permissions, so it can read files, write them, run commands or send data to the internet. The community catalogue says so bluntly: it's an independent scan, not an official Anthropic directory, and it urges you to read a mod's source and permissions before installing it.
How can you tell what a mod is able to do?
Check the declared permissions. For every public mod on GitHub, karanb192's catalogue records what Claude's validator reports: read, write, execute, network. One Reddit user specifically appreciates that each mod displays its permissions before installation.
My rule for clients is simple. A visualisation mod has no reason to need network access. If it asks for it, we don't install it.
Who should make the call within the company?
This is a governance decision, not a personal setting. One of the mods Anthropic ships, sec-default, exists precisely so that an organisation (Team or Enterprise) can keep its rules out of reach of the plugins each person installs. If several colleagues use Claude Code, set an approved list of mods, just as you would for browser extensions. The resources on francenum.gouv.fr provide a general framework for digital practices in small businesses.
Another example comes from Reddit: a student published a mod that routes third-party subscriptions (Cursor, Gemini) through Claude Code by getting around OAuth restrictions. Technically impressive, but it looks like a grey area under those services' terms of use. This isn't the kind of mod a business should plug into its tools.
My verdict: which mods for a small business, and which to avoid?
For a small business, I'd install three mods at most: a cost counter, a guard before deletions or deployments, and a context display. They answer a manager's two real questions, "how much is this costing me?" and "can this break something?", without adding complexity.
I'd skip the decorative mods (animations, Yoda mode, 8-bit sounds): fun, but they don't save any time. I'm also wary of mods that request network access without a clear reason. These mods illustrate a point I've argued from the start: AI should fit into daily work without friction, not become one more gadget.
On ai-first.fr, my own Search Console figures for the last 30 days (pulled on 14 September 2026) put my Claude Code for beginners tutorial at the top with 34 clicks. What readers want is help getting started, not gadgets. So mods are best recommended once you've got the basics down: if you're just starting out, read how to use Claude Code without knowing how to code first, then come back here.
Frequently asked questions
What is a mod in Claude Code?
A mod is a plugin made of JavaScript or TypeScript functions that Claude Code calls on internal events (a tool call, a prompt being sent, the interface being drawn). It can change the display, block or alter an action, or add a command. It installs like any other plugin, with the /plugin command.
Do you need to know how to code to build a mod?
No. You describe the mod to Claude Code in plain language and the tool writes the code, installs it and tests it. It's still wise to ask it to list what the mod reads, writes and sends over the network before you keep it.
Do mods work everywhere, including VS Code?
Mods work in the terminal and in the Code tab of the Claude desktop app, from Claude Code version 2.1.287 onwards. According to videos from early October 2026, the VS Code extension didn't support them yet. They don't apply to Claude conversations on the web either.
Are mods safe?
It depends on the mod. A mod runs inside Claude Code and, depending on its permissions, can read files, write them, run commands or reach the network. Mods in the community catalogue are scanned, but the list isn't official: check the permissions and source before installing.
Which mod should you install first?
Start with a read-only cost or context counter that shows what Claude Code is consuming. Then add a guard before deletions or deployments if several people use the tool on important files.
Vidéos YouTube
- Mods in Claude Code: change how Claude Code works — Claude
- Mods will 10x your Claude Code. Master it in 12 minutes. — Jay E | RoboNuggets
- Claude Code Just Dropped MODS. (Master it in 10 Minutes). — Tristen O'Brien
- Claude Code Mods Are Game Changers. Set Up These 5 NOW. — Nate Herk | AI Automation
Discussions Reddit
- Did you know Claude Code has mods? They're awesome — r/ClaudeCode
- What Claude Code mods have you built so far? — r/claude
- Use any subscription in Claude Code! (using the new Claude Mods feature) — r/ClaudeCode