add SKILL

.claude/skills/improve-prompt/SKILL.md

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+---
+name: improve-prompt
+description: Diagnose and improve an LLM prompt — fix ambiguity, add constraints, specify output format, add examples and edge case handling.
+disable-model-invocation: true
+argument-hint: "[prompt-text-or-file]"
+context: fork
+agent: prompt-engineer
+---
+
+# Improve Prompt
+
+Diagnose and improve the provided prompt.
+
+## Input
+
+$ARGUMENTS
+
+## Steps
+
+1. **Diagnose the current prompt:**
+   - Ambiguity: vague instructions, unclear scope
+   - Missing output format: no schema or structure specified
+   - Weak constraints: "try to", "avoid if possible"
+   - No examples: complex tasks without few-shot
+   - Missing edge cases: no error/fallback handling
+   - No safety rules: missing refusal/deferral instructions
+   - Token bloat: redundant or filler text
+
+2. **Improve following these principles:**
+   - Constraints before instructions (what NOT to do first)
+   - Explicit output schema with required fields and types
+   - 2-3 representative examples for complex tasks
+   - Edge case handling (empty input, malicious input, ambiguous request)
+   - Refusal rules for user-facing prompts
+   - Remove every sentence that doesn't change model behavior
+
+3. **Verify via context7** — check target model capabilities and best practices
+
+4. **Output:**
+
+```markdown
+## Diagnosis
+- [Bullet list of issues found in the original prompt]
+
+## Improved Prompt
+[Clean, copy-ready prompt with clear sections]
+
+## Changes Made
+- [What changed and why — 3-5 items max]
+
+## Usage Notes
+- [Model, temperature, any caveats — only if non-obvious]
+```