nixos-config

Test NixOS configuration changes using the feedback ladder — from instant syntax checks to full system builds. USE WHEN the user wants to verify, test, or check NixOS changes before deploying.

Review and fix documentation surprises discovered by the surprise hook. USE WHEN the user wants to fix documentation issues, review surprises, or address items in .claude/surprises/.

Query systemd journal logs, check service status, diagnose failed units, and analyze boot performance. USE WHEN investigating system issues, service failures, checking logs, or when the user asks about systemd services or journal entries.

Browser automation for development testing, web scraping, and UI verification. USE WHEN you need to interact with web pages, verify UI changes, take screenshots, or extract data from websites.

Systematically explore and test a web application to find bugs, UX issues, and other problems. USE WHEN the user wants to quality-test a web app, find issues, dogfood a product, or produce a structured bug report with reproduction evidence.

Automate Electron desktop apps (VS Code, Slack, Discord, Figma, Notion, Spotify, etc.) via Chrome DevTools Protocol. USE WHEN the user needs to interact with an Electron desktop app, automate a native app, connect to a running Electron app, or test an Electron application.

Interact with Slack workspaces using browser automation. USE WHEN the user needs to check unread channels, send messages, search conversations, navigate Slack, or extract data from Slack workspaces without using the Slack API.

Comprehensive PRD (Product Requirements Document) management skill for creating, planning, and implementing PRDs. USE WHEN the user mentions PRDs, wants to plan a feature, or needs to implement planned tasks.

Create and update agenix-encrypted secrets non-interactively using YubiKey recipients. USE WHEN the user wants to create a new secret, update an existing secret, or store a sensitive value in the secrets directory.

Perform common GitHub operations using the gh CLI. USE WHEN the user wants to file an issue or create a gist.

Look up secrets from KeePassXC via FDO Secret Service. USE WHEN the agent needs credentials, API keys, tokens, or passwords stored in KeePassXC.

Create and manage Claude Code skills, including workflows, reference docs, and CLI scripts. USE WHEN the user wants to create a new skill, add workflows to an existing skill, or update skill definitions.

Write executable temp scripts for multi-step user actions. USE WHEN Claude needs the user to perform any action that requires more than a single command.

Identify, triage, and resolve CVE vulnerabilities found by vulnix in a NixOS system. USE WHEN investigating vulnix scan results, fixing a specific CVE, or triaging security vulnerabilities.

Build the NixOS system derivation, analyze build errors, and automatically apply fixes in a loop until the build succeeds. USE WHEN the user wants to build and fix errors automatically, or mentions deploying, building, or fixing build errors.

Git operations including commit, push, rebase, amend, reword, and squash. USE WHEN the user wants to perform git operations like committing, pushing, rebasing, amending commits, rewriting commit messages, or squashing commits.