Initial extract: templates + methodology guide from Ideation

Public, version-controlled source of truth for TeamIDE's project
templates, coding conventions, and the build-plan → PM scaffolding
rules. Mounted read-only by TeamIDE's planner agent at runtime.

Extracted from the personal Ideation repo as a precondition for
workspace-projects-agent-spec.md §9.4. Personal Ideation stays
private; this repo holds only the publishable methodology.

templates/ResearchStarter/docs/architecture.md

@@ -0,0 +1,35 @@
+# Architecture
+
+> Technical architecture for [Project Name]
+
+**Note:** This document is written after implementation. It describes how things actually work, not how they were planned. For the original design, see [spec.md](../spec.md).
+
+## Tech Stack
+
+| Layer | Technology | Purpose |
+|-------|------------|---------|
+| [Layer] | [Technology] | [Purpose] |
+
+## System Design
+
+[Diagrams, data flow, component interactions.]
+
+## Key Design Decisions
+
+### [Decision 1]
+
+**Context:** [Why this decision was needed]
+
+**Decision:** [What was decided]
+
+**Consequences:** [Trade-offs and implications]
+
+## Data Model
+
+[Describe main entities, formats, and relationships]
+
+## External Dependencies
+
+| Dependency | Purpose | Documentation |
+|------------|---------|---------------|
+| [Library] | [Purpose] | [Link] |