docs: week 4 task 3 added

Week-4/Task-3.md

@@ -0,0 +1,57 @@
+## Proposal Name
+Guided Flow Step Block (Atomic Scene Orchestrator)
+
+### Problem
+Weeks 2 and 3 repeatedly showed that users can build scene states, but struggle to reliably wire one trigger to update camera, visibility, and transforms together. The workaround (prebuilt states + visibility toggles) is reliable, but it does not scale cleanly and lacks smooth transitions.
+
+### User Story
+A product marketer or solution engineer wants to build a 3-step 3D walkthrough where each step updates framing and object emphasis in one click. They need predictable sequencing, reset, and polished transitions without custom code.
+
+### Proposed Builder Experience
+- Author creates Step 1, Step 2, Step 3 in a single Guided Flow panel.
+- Each step has bundled targets:
+	- Camera state
+	- Object visibility state
+	- Object transform targets
+	- Optional transition duration and easing
+- User binds one button (or radio option) to Go To Step N.
+- Runtime applies all updates atomically and shows success/failure feedback per target.
+- User can preview forward, backward, jump, and reset behavior before publishing.
+
+### Proposed Primitive / Block / Pattern
+Introduce a reusable Guided Flow Step Block with:
+- Data model
+	- Steps array where each step includes camera, visibility, transforms, and transition metadata.
+- Execution model
+	- Single transactional apply for all targets in a step.
+	- Deterministic last-write-wins behavior for rapid repeated interactions.
+- Authoring model
+	- Timeline-like step list with reorder and duplicate.
+	- Built-in reset/default step.
+	- Optional guardrails for invalid target bindings.
+- Debug model
+	- Per-step execution log showing applied targets and any failures.
+
+### Why This Matters
+- It directly solves the most repeated pain in Task 2 and Task 3 from Weeks 2 and 3.
+- It upgrades Thob from workaround-based storytelling to first-class guided scene orchestration.
+- It leverages current strengths already proven in Week 3: deterministic discrete state switching and strong hierarchy behavior.
+
+### Complexity Guess
+- Quick Win
+	- Step schema MVP with visibility-only bundles and reset support.
+- Medium
+	- Full bundle support for camera + visibility + transforms with transition controls and validation.
+- Deep
+	- Robust orchestration runtime with rollback strategy, conflict resolution, and advanced sequencing constraints.
+
+### Optional Tiny Demo
+A tiny proof-of-concept can reuse the Week 3 reliable pattern:
+- Build three authored states in one scene.
+- Bind Step 1/2/3 controls through one Guided Flow block instead of manual multi-target bindings.
+- Add transition duration to camera and transform updates.
+
+What this would show:
+- Same reliability as the Week 3 workaround for step order (1 to 2 to 3, 3 to 2 to 1, 1 to 3, repeated toggles).
+- Better authoring clarity and lower setup friction.
+- Immediate storytelling quality improvement with smooth transitions.