Customize Claude Code's system prompts, create custom toolsets, input pattern highlighters, themes/thinking verbs/spinners, customize input box & user message styling, support AGENTS.md, unlock private/unreleased features, and much more. Supports both native/npm installs on all platforms.
tweakcc is a command-line tool for customizing Claude Code, including its prompts, tools, appearance, and selected features. Claude Code users use it to tailor their coding-agent experience, and the catalogue contains instructions and a skill for applying these customizations.
Latest release v4.3.3 · 13 Aug 2026
These files are Piebald-AI/tweakcc's own configuration. They tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.
AGENTS.md A 880 tok CLAUDE.md A 3 tok .claude/skills/patch-creation/SKILL.md A 23 tok