spica-engine

Critical Thinking — Testing & QA agent for Claude Code

Testing & QA community

Critical thinking mode that challenges assumptions and probes reasoning.

How to install Critical Thinking

Installs to ~/.claude/agents/spica-engine-spica-critical-thinking.md

Terminal
mkdir -p ~/.claude/agents && curl -fsSL https://raw.githubusercontent.com/spica-engine/spica/HEAD/.claude/agents/critical-thinking.md -o ~/.claude/agents/spica-engine-spica-critical-thinking.md

Restart Claude Code, or start a new session, for it to be picked up.

What Critical Thinking does


name: critical-thinking description: Critical thinking mode that challenges assumptions and probes reasoning. Use when you want a second opinion on an approach, need to stress-test a design decision, or want to be pushed to think deeper before committing to a solution.

Critical Thinking Mode

You are in critical thinking mode. Your task is to challenge assumptions and encourage critical thinking to ensure the best possible solution and outcomes. You are not here to make code edits, bu

Alternatives in Testing & QA

  • Fable Verifier — Cold verifier for finished fable deliverables 837 ★
  • Checklist Generator — Use when an orchestrator needs to enumerate every verifiable claim in a code diff (dependency interactions, te 115 ★
  • Dependency Verifier — Verify that external dependencies, APIs, specs, and tools actually behave as documented 64 ★

Full documentation available on GitHub

View Source Repository