Skills Guide

Matrix Warnings

VerifiedSafe

Manages personal warnings (grudges) for problematic files or packages in Matrix. Supports adding, listing, checking, and removing warnings with optional severity levels. Helps flag deprecated files or discouraged dependencies within a project.

Download and use
Sby Skills Guide Bot
DevelopmentIntermediate
6/2/2026
Claude Code
#matrix#file-warnings#package-warnings#grudges

Recommended for

Backend developerClaude CodeCode reviewFrontend developerFullstack developerRefactoring

Automated summary

Manages custom warnings (grudges) on files or packages in Matrix via slash commands.

Strengths

  • Allows adding, listing, checking, and removing warnings for specific files or packages.
  • Supports severity levels (info, warn, block) and repo-specific warnings.
  • Direct integration with the `matrix_warn` MCP tool for centralized management.

Limitations

  • Requires the `matrix_warn` MCP tool to be configured and accessible.
  • Warnings are limited to the Matrix environment and do not apply to other platforms.
  • Command syntax can be error-prone due to typos.
When to use it

Use this skill when you want to flag problematic files or packages in your Matrix project to prevent recurring mistakes.

When not to use it

Do not use it for standard linting or static analysis tools, as it is designed for custom warnings, not code rules.

Security analysis

Safe
Quality score85/100

The skill only uses a single MCP tool (matrix_warn) with user-provided strings as arguments; no shell execution, file access, network calls, or obfuscated payloads. It poses no execution risk.

No concerns found

How this analysis is made

Examples

List all warnings
/matrix:warn
Add a warning for a file
/matrix:warn add file src/legacy/*.ts "Deprecated, do not modify"
Add a warning for a package
/matrix:warn add package moment "Use date-fns instead"

name: Matrix Warnings description: This skill should be used when the user asks to "add warning", "remove warning", "list warnings", "check file warning", "check package warning", "manage grudges", or needs to manage file and package warnings in Matrix. user-invocable: true agent: haiku allowed-tools:

  • mcp__plugin_matrix_matrix__matrix_warn

Matrix Warnings

Manage "personal grudges" - warnings for problematic files or packages.

Parse user arguments from the skill invocation (text after the trigger phrase).

Use the matrix_warn tool with the appropriate action parameter.

Actions

List warnings (default, or "list"): Use matrix_warn with action: "list" to show all warnings.

  • Optional: type: "file" or type: "package" to filter
  • Optional: repoOnly: true to show only repo-specific warnings

Add warning ("add <type> <target> <reason>"): Use matrix_warn with action: "add" and:

  • type: "file" or "package"
  • target: file path/pattern or package name
  • reason: why this is problematic
  • severity: "info", "warn", or "block" (default: warn)
  • repoSpecific: true if warning should only apply to current repo

Remove warning ("remove <target>" or "rm <target>"): Use matrix_warn with action: "remove" and either:

  • id: the warning ID to remove, or
  • type + target: to remove by type and target

Check target ("check <target>"): Use matrix_warn with action: "check" and:

  • type: "file" or "package"
  • target: file path or package name

Examples

  • /matrix:warn - list all warnings
  • /matrix:warn add file src/legacy/*.ts "Deprecated, do not modify"
  • /matrix:warn add package moment "Use date-fns instead"
  • /matrix:warn remove moment
  • /matrix:warn check .env

From the file to a first result

The download contains exactly the content displayed on this page. This copy may differ from the latest version in the source repository.

View the source and supporting files

This download contains SKILL.md only. Any scripts, references, templates and dependencies are not included. Get the required files from the source, preserving their directory structure, before continuing.

1. Download the file

Download SKILL.md

From the root of a test project, save the file as .skill-downloads/matrix-warnings-mm5t8ahy/SKILL.md, or use the command below. This folder is for inspecting the skill before installation.

Command for macOS/Linux or WSL: requires a POSIX shell and curl. On Windows without WSL, use the download button and create the folder manually.

mkdir -p '.skill-downloads/matrix-warnings-mm5t8ahy' && curl --fail --show-error --location 'https://skills-guides.com/api/skills/matrix-warnings-mm5t8ahy/download' --output '.skill-downloads/matrix-warnings-mm5t8ahy/SKILL.md.part' && mv '.skill-downloads/matrix-warnings-mm5t8ahy/SKILL.md.part' '.skill-downloads/matrix-warnings-mm5t8ahy/SKILL.md'

2. Check prerequisites

Read SKILL.md before using it. If it references scripts or external services, inspect them and prepare the required access in your test environment.

No recognized prerequisites section in this file. This does not mean it is self-contained: libraries, tools and access requirements may be mentioned elsewhere in the content or source repository.

The platforms on this page are catalog indications. The paths below follow tool documentation; they do not prove this skill has been run in those tools. No minimum tool version is confirmed for this listing.

3. Load the skill

This file does not provide a usable name/description header for this native procedure. It remains available to download and inspect; use the manual method below.

Manual method or another tool: attach SKILL.md to a conversation, or open it in an agent that can read files. Include any required supporting resources. No universal folder is recognized by every tool.

4. Try a first task

Use a short, synthetic input: an API endpoint, a small document or an interface brief. In a new conversation, attach the file or give the agent its path, then adapt this request:

Read .skill-downloads/matrix-warnings-mm5t8ahy/SKILL.md and apply its instructions to this example: [describe a test input]. Identify any missing files, dependencies or access. Produce the result requested by the skill without inventing data or running unreviewed scripts.

Expected result: output matching the skill instructions, or a precise list of missing prerequisites. A read confirmation alone does not validate a first use. If an external resource is unavailable, that path remains untested.

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