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 TypeScript CLI tool distributed via npm that modifies Claude Code's bundled JavaScript files directly, allowing developers to customize the application well beyond its built-in settings. Core features include editing any of Claude Code's system prompts, creating named toolsets accessible via a new `/toolset` command, building custom UI themes with an HSL/RGB color picker, adding custom thinking verbs and spinner animations, and highlighting input patterns with per-character styling similar to the former `ultrathink` rainbow effect. Version 4.0.0 added AGENTS.md support, a `/remember` skill, MCP startup optimization, token count rounding, statusline throttling, and the ability to unlock unreleased features such as session memory. A standout addition is the `opusplan[1m]` model alias, which routes planning to Claude Opus while using Sonnet's one-million-token context window for execution. The tool targets Claude Code users on all platforms who want fine-grained control over prompts, models per subagent role, table rendering formats, and terminal UI presentation that the official client does not expose.
- ✓Open-source license (MIT)
- ✓Actively maintained (<30d)
- ✓Healthy fork ratio
- ✓Clear description
- ✓Topics declared
- ✓Documented (README)
git clone https://github.com/Piebald-AI/tweakccTools overview
What people ask about tweakcc
What is Piebald-AI/tweakcc?
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Piebald-AI/tweakcc is tools for the Claude AI ecosystem. 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. It has 2.2k GitHub stars and was last updated today.
How do I install tweakcc?
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You can install tweakcc by cloning the repository (https://github.com/Piebald-AI/tweakcc) or following the README instructions on GitHub. ClaudeWave also provides quick install blocks on this page.
Is Piebald-AI/tweakcc safe to use?
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Our security agent has analyzed Piebald-AI/tweakcc and assigned a Trust Score of 100/100 (tier: Verified). See the full breakdown of passed checks and flags on this page.
Who maintains Piebald-AI/tweakcc?
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Piebald-AI/tweakcc is maintained by Piebald-AI. The last recorded GitHub activity is from today, with 61 open issues.
Are there alternatives to tweakcc?
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Yes. On ClaudeWave you can browse similar tools at /categories/tools, sorted by popularity or recent activity.
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