Customize Claude Code: tweakcc, cc-mirror, vibeproxy & More

Customizing Claude Code spans three layers: cosmetic (themes, status lines, spinners), behavioral (approval policies, hooks, agent routing), and architectural (provider variants, multi-instance routing). Each standalone tool covers one slice of one layer. ClaudeFast Code Kit ships its own implementation of all three layers, wired together so each component triggers the others.

Quick verdict: Each standalone tool covers one customization slice. Tweakcc styles the cosmetic layer. cc-mirror and vibeproxy route the architectural layer. claudekit and claude-code-boost gate the behavioral layer. ClaudeFast Code Kit ships its own implementation of every layer plus the wiring between them: a smart status line on the cosmetic side (the only cosmetic surface that does real work), 5 production hooks plus 18 agent definitions plus 5 slash commands on the behavioral side, and provider-agnostic 5-tier complexity routing on the architectural side. The components reference each other, so changing one updates the rest.

Why Customization Matters in 2026

Two specific 2026 events made customization more than aesthetic. First, the April 4, 2026 policy change blocked Pro and Max subscribers from using their subscriptions with most third-party agent frameworks, putting cc-mirror, vibeproxy, and similar provider-routing tools in a narrower compatibility lane. Second, Claude Code 2.1.32+ shipped Anthropic Agent Teams (gated behind CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1), which made the behavioral layer (how agents coordinate) more important than the cosmetic one.

Three layers of customization now exist:

1. Cosmetic: themes, spinners, message styling, and status lines (the one cosmetic surface that does real functional work, displaying live model, context fill, 5-hour window usage, and backup state)
2. Behavioral: approval policies, auto-hooks, custom toolsets, system prompt overrides, agent routing
3. Architectural: alternative providers, multi-instance routing, native UI wrappers

The six standalone tools below cover individual slices of single layers. ClaudeFast Code Kit covers all three layers via wired components: a status-line monitor on the cosmetic side, 5 production hooks plus 18 specialist agents plus 5 slash commands on the behavioral side, and provider-agnostic 5-tier complexity routing on the architectural side.

Quick Win: Theme Claude Code in 60 Seconds

The fastest customization is theming. Install tweakcc and run it once:

npm install -g tweakcc
tweakcc

Pick a theme, a thinking verb, and a spinner. Done. Your terminal feels like yours, not Anthropic's. Below, the five other tools that go deeper.

The Six Standalone Customization Tools

1. Piebald-AI/tweakcc (1.6k stars)

The dominant cosmetic-layer tool. Customize Claude Code's system prompts, create custom toolsets, build input pattern highlighters, swap themes/thinking verbs/spinners, customize input box and user message styling, support AGENTS.md, and unlock private/unreleased features. Cross-platform.

Why it leads: tweakcc is the only tool that touches every cosmetic surface in one CLI. Other theme tools cover one or two settings. tweakcc covers everything plus the unreleased flags.

Install:

npm install -g tweakcc
tweakcc

Best for: Anyone who's looked at the default Claude Code interface for more than a week and thought "I want this differently." The unlock-private-features option alone is worth the install.

2. numman-ali/cc-mirror (2.2k stars)

Create multiple isolated Claude Code variants with custom providers (Z.ai, MiniMax, OpenRouter, LiteLLM). TypeScript.

Why it matters: Anthropic's policy shift on April 4, 2026 blocked third-party agent frameworks from Pro/Max subscriptions. cc-mirror lets you keep an alternative-provider Claude Code variant available for projects where you want a different model behind the same UI.

Install:

npm install -g cc-mirror
cc-mirror create --provider openrouter --name openrouter-cc

Best for: Engineers who want provider flexibility without losing the Claude Code interface. Useful for cost experiments and red-team comparisons.

3. automazeio/vibeproxy (2.2k stars)

Native macOS menu-bar app to use Claude Code and ChatGPT subscriptions with AI coding tools without API keys. Swift.

Why it's interesting: vibeproxy uses your existing subscription tokens through the menu bar app, so any tool that wants to call Claude or ChatGPT routes through the proxy and uses your already-paid-for subscription.

Install: Download from the vibeproxy releases page. Mac only.

Best for: macOS users on Pro or Max who want to use their subscription with non-Anthropic tools. Note: the April 4 third-party policy change may limit some integrations.

4. carlrannaberg/claudekit

CLI toolkit that adds safety guardrails, workflow automation, and AI sub-agent orchestration on top of Claude Code, with configurable approval policies and task routing.

Why it's behavioral, not cosmetic: claudekit changes how Claude Code makes decisions, not how it looks. Configurable approval policies mean you can auto-approve safe operations and require human review for risky ones, on a per-project basis.

Install:

npm install -g claudekit
claudekit init

Best for: Teams who need predictable Claude Code behavior across multiple engineers. The approval policies prevent the "Claude force-pushed to main" class of incident.

5. yifanzz/claude-code-boost (162 stars)

TypeScript utility providing intelligent auto-approval hooks for Claude Code. Automatically approves safe file operations and blocks destructive commands based on configurable rulesets.

Why it's separate from claudekit: Smaller scope, more transparent logic. claude-code-boost is one focused thing (smarter auto-approval) where you can read the rules in 10 minutes. claudekit is a full toolkit.

Install:

npm install -g claude-code-boost
ccb init

Best for: Engineers who want better auto-approval without adopting a full toolkit. Pairs well with our hooks guide for fully custom logic.

6. wasabeef/claude-code-cookbook

Collection of settings and configurations to make Claude Code more useful. Not a tool, a set of opinionated configs you can copy.

Why it's here: Most customization tools assume you know what you want. The cookbook shows you patterns that work for other people, so you can borrow before you customize.

Best for: Anyone in week one of Claude Code who's not sure what to customize. Read the cookbook, pick patterns you like, then reach for tweakcc or claudekit to apply them.

Side-by-Side: Standalone Tools vs ClaudeFast Code Kit (by Layer)

The previous table compared each standalone tool by what it covers. This one is apples-to-apples: pick a layer, see what each side ships for it.

A Sane Default Setup

Two paths depending on whether you want to assemble or buy assembled.

Assemble path (free, ~3 hours setup):

1. tweakcc for theming and feel
2. claude-code-boost for smarter auto-approval (read the rules first)
3. claude-code-cookbook for pattern reference, then delete what you don't use
4. Write your own agent definitions, hooks, and slash commands

Skip the architectural tools (cc-mirror, vibeproxy) unless you have a specific provider or platform need. Most teams don't.

Buy-assembled path (~30 seconds setup):

1. Extract ClaudeFast Code Kit into your .claude/ folder
2. Add tweakcc on top for theming preference
3. Ship

The assemble path is the right call if you have strong opinions about the behavioral layer and want to write it yourself. The buy-assembled path is the right call if you'd rather spend the 3 hours building features.

What Standalone Tools Don't Cover: The Integrated Behavioral Layer

Customization tools change cosmetic and architectural slices. None of them ship the integrated behavioral layer that turns Claude Code into a production system. Four pieces define that layer:

1. Specialist agents in .claude/agents/ doing real domain work
2. Domain skills in .claude/skills/ encoding methodology
3. Production hooks in .claude/settings.json automating decisions
4. Slash commands in .claude/commands/ for structured execution

ClaudeFast ClaudeFast Code Kit ships all four as one wired bundle: 18 specialist agents (frontend-specialist, backend-engineer, security-auditor, performance-optimizer, and 14 more), 167 domain skill files across 21 categories, 5 production hooks (SkillActivation, Permission, ContextRecovery, Formatter, BiomeValidator), and 5 custom slash commands (/team-plan, /build, /team-build, /blog, /view). Plus a CLAUDE.md behavioral layer with 5-tier complexity routing and the build-then-validate pattern.

Customization tools become the cherry on top, not the foundation. tweakcc themes the terminal that runs ClaudeFast Code Kit. claude-code-boost auto-approves operations ClaudeFast Code Kit's PermissionHook would otherwise route through review. The two layers complement each other.

What to Read Next

• Statusline guide for status line customization
• Keybindings guide for keyboard shortcut overrides
• Permission management for the security side of approval policies
• Hooks guide for behavioral customization without a toolkit
• Best Claude Code skills repos for the layer that actually changes what Claude Code can do

The customization trap is spending Saturday styling your terminal instead of shipping. Tweak once, then build for the rest of the week.