Claude Code Prompt Improver — Development skill for Claude Code

Claude Code Prompt Improver

A UserPromptSubmit hook that enriches vague prompts before Claude Code executes them. Uses the AskUserQuestion tool (Claude Code 2.0.22+) for targeted clarifying questions.

What It Does

Intercepts prompts and evaluates clarity. Claude then:

• Checks if the prompt is clear using conversation history
• For clear prompts: proceeds immediately (zero overhead)
• For vague prompts: invokes the prompt-improver skill to create research plan, gather context, and ask 1-6 grounded questions
• Proceeds with original request using the clarification

**Result:** Better outcomes on the first try, without back-and-forth.

**v0.4.0 Update:** Skill-based architecture with hook-level evaluation achieves 31% token reduction. Clear prompts have zero skill overhead, vague prompts get comprehensive research and questioning via the skill.

How It Works

sequenceDiagram
    participant User
    participant Hook
    participant Claude
    participant Skill
    participant Project

    User->>Hook: "fix the bug"
    Hook->>Claude: Evaluation prompt (~189 tokens)
    Claude->>Claude: Evaluate using conversation history
    alt Vague prompt
        Claude->>Skill: Invoke prompt-improver skill
        Skill-->>Claude: Research and question guidance
        Claude->>Claude: Create research plan (TodoWrite)
        Claude->>Project: Execute research (codebase, web, docs)
        Project-->>Claude: Context
        Claude->>User: Ask grounded questions (1-6)
        User->>Claude: Answer
        Claude->>Claude: Execute original request with answers
    else Clear prompt
        Claude->>Claude: Proceed immediately (no skill load)
    end

Installation

**Requirements:** Claude Code 2.0.22+ (uses AskUserQuestion tool for targeted clarifying questions)

Option 1: Via Marketplace (Recommended)

**1. Add the marketplace:**

claude plugin marketplace add severity1/severity1-marketplace

**2. Install the plugin:**

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