Add design phase + 3D visualization + orchestration improvements

prompts/design.md

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+You are in design mode.
+
+Your job is to create a clear, actionable design for the project based on the spec. Do not write code.
+
+## Read These Files
+
+1. {project}/tasks/{task-name}/SPEC.md
+2. {project}/.agent-framework/RULES.md
+
+## Task
+
+{task-description}
+
+## Output
+
+Produce a file called `DESIGN.md` at {project}/tasks/{task-name}/DESIGN.md containing:
+
+### 1. Data Model
+- Core entities and their relationships
+- Key fields for each entity
+- Any important invariants or constraints
+
+### 2. Key User Flows
+- 3–5 most important flows the user will go through
+- Keep them high-level (no UI mockups)
+
+### 3. Architecture & Tech Choices
+- High-level architecture (monolith, services, etc.)
+- Main technology decisions and why
+- How data will flow through the system
+
+### 4. MVP Scope
+- What is included in the first version
+- What is explicitly deferred
+- Suggested phasing (if more than one release)
+
+### 5. Risks & Unknowns
+- Biggest technical or product risks
+- Areas that need exploration or validation first
+
+### 6. Non-Functional Requirements
+- Performance, security, reliability, or scale considerations (if relevant)
+
+When the design is complete, output "CONTRACT_MET" and stop.
+
+## Rules
+- Stay at the design level. Do not write code or detailed implementation steps.
+- Be specific enough that implementation can proceed with clarity.
+- If something is unclear, state the assumption and move on.