Do Think

Structured deep-thinking framework for the moment before you act, not the act itself. Pick a mode (Solo or Interactive), emit the opening contract, run the 4-phase loop, and apply the mandatory stress-test at Tier Medium/High before committing.

When to use

Trigger on phrasings like "think deeply", "what should I do", "should we…", "help me decide", "walk me through this", "let's brainstorm".

Use when:

• the problem is underspecified, the right frame is unknown, or the user is stuck on framing
• multiple viable approaches have non-trivial tradeoffs (architecture, API shape, dependency choice)
• the change is expensive to reverse — schemas, public contracts, infra, security boundaries
• the codebase or domain is unfamiliar and the first-plausible-answer would be a guess
• root-cause reasoning is needed and there is no runtime to debug against (post-mortem, design review)
• a refactor could change behavior, boundaries, or invariants and you need to plan before touching code
• the user explicitly asks to brainstorm, walk through, explore options, or co-author a decision
• the task is likely to derail after the first obstacle and continuous execution discipline matters