Behavioral guidelines to reduce common LLM coding mistakes. Surface assumptions, avoid overcomplication, make surgical changes, define verifiable success criteria. Use when writing, reviewing, or refactoring code. Derived from Andrej Karpathy's observations on LLM coding pitfalls.
Run temporary/ad-hoc binaries on NixOS using nix-shell -p and patchelf. Use when a prebuilt binary won't run on NixOS, or when you need a tool ephemerally without permanent installation.
Configure and build Elisp projects using Eldev. Manage dependencies from package archives, Git repos, and local sources. Run tests with ERT, byte-compile projects, launch interactive Emacs sessions with project context, and manage loading modes. Use when user mentions eldev, an Eldev file, or an Elisp project with dependencies.
Prepare an Emacs Lisp package for MELPA submission — source file conventions, code style, and submission checklist. Use when user wants to submit a package to MELPA or asks about MELPA requirements.
Pin nixpkgs revisions to build and use older Emacs versions (27, 28, 29) for testing eldev projects. Use when user needs an older Emacs for testing, or mentions emacs27/28/29 and nix.
Create and maintain agent skills using Org-mode as the source format. Add entries to SKILLS.org with EXPORT_SKILL_* properties, then export to markdown. Use when user wants to create, write, or build a new skill in an Org-mode-based skills repo.
Ultra-compressed communication mode. Cuts token usage ~75% by speaking like caveman while keeping full technical accuracy. Supports intensity levels: lite, full (default), ultra. Use when user says "caveman mode", "talk like caveman", "use caveman", "less tokens", "be brief", or invokes /caveman. Also auto-triggers when token efficiency is requested.
Create new agent skills with proper structure, progressive disclosure, and bundled resources. Use when user wants to create, write, or build a new skill.