diff --git a/workflow-diagram.md b/workflow-diagram.md
index b3c860ac..763831e4 100644
--- a/workflow-diagram.md
+++ b/workflow-diagram.md
@@ -1,135 +1,83 @@
 ```mermaid
 flowchart TD
-subgraph subGraph0["Phase 0: Ideation (Optional)"]
-A1["BA / Researcher"]
-A0["User Idea"]
-A2["project-brief"]
-A3["DR: BA"]
-end
-subgraph subGraph1["Phase 1: Product Definition"]
-B1["Product Manager"]
-B2["prd"]
-B3["epicN (Functional Draft)"]
-B4["DR: PRD"]
-end
-subgraph subGraph2["Phase 2: Technical Design"]
-C1["Architect"]
-C2["architecture"]
-C3["Reference Files"]
-C4["DR: Architecture"]
-end
-subgraph subGraph3["Phase 3: Refinement, Validation & Approval"]
-R1{"Refine & Validate Plan"}
-R2["PM + Architect + Tech SM"]
-R3["PO Validation"]
-R4{"Final Approval?"}
-R5["Approved Docs Finalized"]
-R6["index"]
-end
-subgraph subGraph4["Phase 4: Story Generation"]
-E1["Technical Scrum Master"]
-E2["story-template"]
-E3["story_X_Y"]
-end
-subgraph subGraph5["Phase 5: Development"]
-F1["Developer Agent"]
-F2["Code + Tests Committed"]
-F3["Story File Updated"]
-end
-subgraph subGraph6["Phase 6: Review & Acceptance"]
-G1{"Review Code & Functionality"}
-G1_1["Tech SM / Architect"]
-G1_2["User / QA Agent"]
-G2{"Story Done?"}
-G3["Story Done"]
-end
-subgraph subGraph7["Phase 7: Deployment"]
-H1("Developer Agent")
-H2@{ label: "Run IaC Deploy Command (e.g., `cdk deploy`)" }
-H3["Deployed Update"]
-end
-A0 -- PO Input on Value --> A1
-A1 --> A2 & A3
-A2 --> B1
-A3 --> B1
-B4 <--> B1
-B1 --> B2 & B3
-B2 --> C1 & R1
-B3 <-- Functional Req --> C1
-C4 -.-> C1
-C1 --> C2 & C3
-B3 --> R1
-C2 --> R1
-C3 --> R1
-R1 -- Collaboration --> R2
-R2 -- Technical Input --> B3
-R1 -- Refined Plan --> R3
-R3 -- "Checks: <br>1. Scope/Value OK?<br>2. Story Sequence/Deps OK?<br>3. Holistic PRD Alignment OK?" --> R4
-R4 -- Yes --> R5
-R4 -- No --> R1
-R5 --> R6 & E1
-B3 -- Uses Refined Version --> E1
-C3 -- Uses Approved Version --> E1
-E1 -- Uses --> E2
-E1 --> E3
-E3 --> F1
-F1 --> F2 & F3
-F2 --> G1
-F3 --> G1
-G1 -- Code Review --> G1_1
-G1 -- Functional Review --> G1_2
-G1_1 -- Feedback --> F1
-G1_2 -- Feedback --> F1
-G1_1 -- Code OK --> G2
-G1_2 -- Functionality OK --> G2
-G2 -- Yes --> G3
-G3 --> H1
-H1 --> H2
-H2 --> H3
-H3 --> E1
+    %% Phase 0: BA
+    subgraph BA["Phase 0: Business Analyst"]
+        BA_B["Mode 1: Brainstorming"]
+        BA_R["Mode 2: Deep Research"]
+        BA_P["Mode 3: Project Briefing"]
 
-    H2@{ shape: rect}
-     A0:::default
-     A1:::agent
-     A2:::doc
-     A3:::doc
-     B1:::default
-     B2:::doc
-     B3:::doc
-     B4:::doc
-     C1:::default
-     C2:::doc
-     C3:::doc
-     C4:::doc
-     F2:::default
-     F3:::doc
-     H3:::default
-     R1:::process
-     R2:::agent
-     R3:::agent
-     R4:::process
-     R5:::default
-     R6:::doc
-     E1:::agent
-     E2:::doc
-     E3:::doc
-     F1:::agent
-     G1:::process
-     G1_1:::agent
-     G1_2:::agent
-     G2:::process
-     G3:::process
-     H1:::agent
-     H2:::process
-    classDef agent fill:#1a73e8,stroke:#0d47a1,stroke-width:2px,color:white,font-size:14px
-    classDef doc fill:#43a047,stroke:#1b5e20,stroke-width:1px,color:white,font-size:14px
+        BA_B --> BA_P
+        BA_R --> BA_P
+    end
+
+    %% Phase 1: PM
+    subgraph PM["Phase 1: Product Manager"]
+        PM_D["Mode 2: Deep Research"]
+        PM_M["Mode 1: Initial Product Def."]
+        PM_C["PM Checklist Verification"]
+        PM_PRD["PRD Complete"]
+
+        PM_D --> PM_M
+        PM_M --> PM_C
+        PM_C --> PM_PRD
+    end
+
+    %% Phase 2: Architect
+    subgraph ARCH["Phase 2: Architect"]
+        ARCH_P["Architecture Package Creation"]
+        ARCH_C["Architect Checklist Verification"]
+        ARCH_D["PRD+Architecture and Artifacts"]
+
+        ARCH_P --> ARCH_C
+        ARCH_C --> ARCH_D
+    end
+
+    %% Phase 3: PO
+    subgraph PO["Phase 3: Product Owner"]
+        PO_C["PO Checklist Verification"]
+        PO_A["Approval"]
+    end
+
+    %% Phase 4: SM
+    subgraph SM["Phase 4: Scrum Master"]
+        SM_S["Draft Next Story"]
+        SM_A["User Story Approval"]
+    end
+
+    %% Phase 5: Developer
+    subgraph DEV["Phase 5: Developer"]
+        DEV_I["Implement Story"]
+        DEV_T["Test"]
+        DEV_D["Deploy"]
+        DEV_A["User Approval"]
+
+        DEV_I --> DEV_T
+        DEV_T --> DEV_D
+        DEV_D --> DEV_A
+    end
+
+    %% Connections between phases
+    BA_P --> PM_M
+    User_Input[/"User Direct Input"/] --> PM_M
+    PM_PRD --> ARCH_P
+    ARCH_D --> PO_C
+    PO_C --> PO_A
+    PO_A --> SM_S
+    SM_S --> SM_A
+    SM_A --> DEV_I
+    DEV_A --> SM_S
+
+    %% Completion condition
+    DEV_A -- "All stories complete" --> DONE["Project Complete"]
+
+    %% Styling
+    classDef phase fill:#1a73e8,stroke:#0d47a1,stroke-width:2px,color:white,font-size:14px
+    classDef artifact fill:#43a047,stroke:#1b5e20,stroke-width:1px,color:white,font-size:14px
     classDef process fill:#ff9800,stroke:#e65100,stroke-width:1px,color:white,font-size:14px
-    classDef default fill:#333333,color:white,stroke:#999999,stroke-width:1px,font-size:14px
+    classDef approval fill:#d81b60,stroke:#880e4f,stroke-width:1px,color:white,font-size:14px
 
-    %% Styling for subgraphs
-    classDef subGraphStyle font-size:16px,font-weight:bold
-    class subGraph0,subGraph1,subGraph2,subGraph3,subGraph4,subGraph5,subGraph6,subGraph7 subGraphStyle
-
-    %% Styling for edge labels
-    linkStyle default font-size:12px
+    class BA,PM,ARCH,PO,SM,DEV phase
+    class BA_P,PM_PRD,ARCH_D artifact
+    class BA_B,BA_R,PM_D,PM_M,ARCH_P,SM_S,DEV_I,DEV_T,DEV_D process
+    class PM_C,ARCH_C,PO_C,PO_A,SM_A,DEV_A approval
 ```