Sequential Thinking

Replaces the sequential_thinking MCP server. Same intent — externalize a numbered chain of thoughts with revision and branch semantics — implemented as visible Markdown so any reasoning-capable model (Claude 4.x extended thinking, Gemini 3.x thinking, GPT-5.x reasoning) can follow it without an extra tool round-trip.

When to use

• The problem has 3+ interacting constraints or sub-decisions.
• An earlier conclusion may need revising as new evidence arrives.
• More than one viable approach is on the table and they should be compared, not silently chosen.
• The user explicitly asked for stepwise/structured reasoning.

If none of these hold, answer directly — protocol overhead on a simple question wastes tokens and looks performative.

Why a visible protocol (not just internal CoT)

Modern reasoning models already think internally. They need a shared on-the-page format so: