# tweakcc

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.

Repository: https://github.com/Piebald-AI/tweakcc
Canonical: https://ross.abutalabs.com/products/tweakcc
Language: TypeScript
License: MIT
License Family: permissive
Topics: agentic, anthropic, claude-code, command-line, configuration, customization, styling, tweak, claude-code-ui, themes, claude-code-themes, personalization, token-counter, claude-code-system-prompts, system-prompts, refined-claude-code, bun, claude-code-native, developer-tools, terminal
Last push: 2026-08-26T14:36:10+00:00

## Health v2 (maintenance only)
Score: 80/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 85, longevity 29
- inputs: {"age_days": 409, "days_push": 7, "days_rel": 20, "gap_med": 2.0, "n_releases_24m": 67}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2465, forks 195 (observed 2026-08-28T04:06:53.629546+00:00)

## What it is
tweakcc is a command-line tool for customizing Claude Code's appearance (theme colors, thinking verbs) and inspecting or modifying its system prompts, tool descriptions, and sub-agent prompts. Its companion repository tracks the full text of Claude Code's system prompts, updated within minutes of each Claude Code release.

## Use cases
- customize claude code theme colors
- change claude code thinking verbs
- view claude code system prompts
- read claude code builtin tool descriptions
- track system prompt changes across claude code versions
- customize claude code sub agent prompts

## When to choose
- you use Claude Code daily and want to personalize its terminal theme and wording
- you want to study or diff Claude Code's system prompts and tool descriptions across versions
- you want a maintained, up-to-date mirror of Claude Code's prompts

## When to avoid
- you don't use Claude Code or another Anthropic CLI agent
- you need a general-purpose prompt management tool for arbitrary LLM apps
- you need a GUI-based customization tool

## Facets
- artifact type: cli-tool
- maturity: active
- function: cli, theme, prompt-engineering, developer-tools
- domain: developer-tools, large-language-models
- platform: cli, cross-platform, windows
- tags: claude-code, system-prompts, terminal-ui, customization, anthropic, cli-agents, command-line, ai-agents, nodejs, macos, linux

## Member repositories
- Piebald-AI/tweakcc (main) score 80
- Piebald-AI/claude-code-system-prompts (docs) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:53.629546+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:14:02.257852+00:00, confidence not recorded.
  - readme: https://github.com/Piebald-AI/tweakcc (fetched 2026-08-28T04:06:53.629546+00:00, sha b1a04cd1701a)
  - registry_npm: https://registry.npmjs.org/tweakcc (fetched 2026-08-29T08:11:31.750125+00:00, sha cdeae70535fa)
- Data as of 2026-08-30T08:39:29.467469+00:00.