nix

Research and recommend the best local LLM model stack for the current machine. Detects hardware (CPU, GPU, RAM, VRAM), discovers installed hosting stacks (Ollama, llama.cpp, vLLM, etc.), searches Hugging Face for compatible models, and enables easy downloads. Use when the user wants to find, evaluate, or download local AI models that will run well on their system.

Zellij terminal multiplexer — creating KDL layouts, managing sessions via CLI, and running commands without disrupting the user's workspace

Use when adding a new service to a Nix flake — creating packages from upstream repos (Go, Node, Python), writing service modules, managing configs, wiring secrets, and testing. Covers the full lifecycle from source to running daemon.

Use when a launchd service on nix-darwin fails to start, exits with non-zero status, or doesn't restart after a switch. Triggers on: exit code 78, "EX_CONFIG", "Operation not permitted", daemon vs user.agent decisions, plist not being reloaded.

Use when managing 1Password secrets via Nix on nix-darwin. Triggers on: adding API keys, tokens, or credentials to service configs; wiring opnix 1Password items into home-manager modules; creating opnix-managed secret files with activation script ordering.

Use when tracking, planning, implementing, or reviewing work using yx (yaks) with the autonomous /shave loop, or when multiple agents need to coordinate on shared tasks

Use Jujutsu (jj) for version control. Covers workflow, commits, bookmarks with Conventional Branch naming, pushing to GitHub, absorb, squash, stacked PRs, workspaces with auto-sync for OpenCode sessions. Use when working with jj, creating commits, pushing changes, or managing version control.

Use when iterating on shell scripts embedded in Nix modules via writeShellScriptBin, writeShellApplication, writeScriptBin, or writeText — avoids slow build/switch cycles for every edit

Use when waiting for GitHub Actions CI jobs to complete on a pull request in jj workspaces, checking pipeline status, or monitoring workflow runs with intelligent polling to avoid rate limits

Use when a specification has open questions requiring research, technical decisions, or user input to resolve

Use when initializing a new project with devenv, direnv, and jj version control. Triggers on: setting up dev environment, configuring nix shell, project bootstrap.

Display PRD files in human-readable format for review and status tracking

Write specifications optimized for Ralph Loop autonomous agent execution

Use when updating, rewriting, or auditing documentation to follow the Diataxis framework with its four distinct content types