---
title: "redact-output"
url: "https://claudemods.dev/en/builds/redact-output-3ee3e5"
source: "https://github.com/BeLazy167/claude-mods-skill/tree/main/examples/redact-output"
source_type: "github"
repo: "https://github.com/BeLazy167/claude-mods-skill/tree/main/examples/redact-output"
author: "BeLazy167"
author_handle: "BeLazy167"
stars: 9
category: "Security & privacy"
categories: ["security"]
tags: ["bash", "hooks", "output-redaction", "plugin", "secrets"]
permission_level: 2
scan_complete: true
install: "claude plugin marketplace add BeLazy167/claude-mods-skill\nclaude plugin install redact-output@claude-mods-skill"
added: "2026-10-12T04:02:52.843Z"
updated: "2026-10-06T05:05:14Z"
locale: "en"
content_locale: "en"
---

# redact-output

Example Claude Code mod that rewrites Bash output before the model reads it, preventing tokens and secrets from entering context.

## Description

redact-output is a TypeScript function-hook mod for Claude Code that intercepts Bash tool output and rewrites it before the model can read it, so tokens and other sensitive values never enter the context window. It is shipped as one of five examples in the claude-mods-skill plugin and passes claude plugin validate, claude plugin test and tsc. Install it for a session with `claude --plugin-dir examples/redact-output`, or install the whole claude-mods-skill marketplace plugin. Requires Claude Code 2.1.287 or later; the legacy CLAUDE_CODE_ENABLE_FUNCTION_HOOKS flag is ignored.

## Install

```
claude plugin marketplace add BeLazy167/claude-mods-skill
claude plugin install redact-output@claude-mods-skill
```

## Original README

# claude-mods-skill

A Claude Code skill that teaches an agent how to build **Claude Mods**:
plugins whose behaviour is a TypeScript function-hook module that runs
inside Claude Code. It ships five small example mods that the agent copies.
Each example passes `claude plugin validate`, `claude plugin test` and `tsc`.

Tested with Claude Code **2.1.290**. Mods need 2.1.287 or later and are on
by default. The old `CLAUDE_CODE_ENABLE_FUNCTION_HOOKS` flag is ignored;
remove it from your settings.

Claude Code also has a built-in `plugin-authoring` skill. That one knows
your exact build. This skill sits on top of it: tested examples, traps seen
on real builds, and how to prove and ship a mod.

## Install

At the Claude Code prompt:

```
/plugin install claude-mods-skill --marketplace BeLazy167/claude-mods-skill
```

Or from your shell:

```sh
claude plugin marketplace add BeLazy167/claude-mods-skill
claude plugin install claude-mods-skill@claude-mods-skill
```

Then ask Claude to build a mod. The `creating-mods` skill loads on its own.

## What is inside

- `skills/creating-mods/SKILL.md`: the workflow, which example to copy, quick reference, loader rules, sharing.
- `skills/creating-mods/references/gotchas.md`: version-tagged traps from real builds.
- `skills/creating-mods/references/examples.md`: Anthropic and community mods worth reading.
- `examples/`:

| Example | Shows |
|---|---|
| `hello-mod` | Block a tool call; fail-closed `.catch`; `smoke.sh` proves the deny |
| `redact-output` | Rewrite Bash output before the model reads it |
| `branch-band` | Git branch above the prompt; `$.process.run` on a timer; `$.state` |
| `notes-pane` | `/note` and `/notes`; a pane with a Button; `$.store` |
| `dice-tool` | A tool the model can call |

Try one for a session: `claude --plugin-dir examples/notes-pane`.

## Keeping it current

The mods API changes between releases. After a Claude Code update, run:

```sh
scripts/check.sh
```

It validates, tests and type-checks every example against your build.

## Links

- Docs: https://code.claude.com/docs/en/plugins/mods/overview
- Built-in mods source: https://github.com/anthropics/claude-code/tree/main/mods
- Design thread: https://github.com/anthropics/claude-code/issues/91870
- Community catalogue: https://github.com/karanb192/awesome-claude-code-mods