DMP'25 Week 11-12 blog update by final report by Justin Charles

src/constants/MarkdownFiles/posts/2025-08-31-dmp-25-justin212407-week-11-12.md

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+---
+title: "DMP’25 Week 11–12 Update by Justin Charles"
+excerpt: "Parsing the tree: building the AST pipeline to connect Masonry’s brick towers with the Program execution layer"
+category: "DEVELOPER NEWS"
+date: "2025-09-31"
+slug: "2025-09-31-dmp-25-justin212407-week11-12"
+author: "@/constants/MarkdownFiles/authors/justin-charles.md"
+tags: "dmp25,sugarlabs,week11,week12,ast,justin212407"
+image: "assets/Images/c4gt_DMP.webp"
+---
+
+<!-- markdownlint-disable -->
+
+# Week 11–12 Progress Report by Justin Charles
+
+**Project:** Music Blocks 4 Masonry  
+**Mentors:** [Anindya Kundu](https://github.com/meganindya/), [Sumit Srivastava](https://github.com/sum2it)  
+**Assisting Mentors:** [Devin Ulibari](https://github.com/pikurasa/), [Walter Bender](https://github.com/walterbender)  
+**Reporting Period:** 2025-09-18 – 2025-09-31   
+
+---
+
+## Parsing the Tree: Connecting Masonry and the Program
+
+### B1. Hardcoded Tower for Bootstrapping
+- Built large sample towers (30–40 bricks) directly in the workspace.  
+- Covered **sequences, compounds (loops/conditionals with sockets), expressions, and mixed music/movement/system bricks** to stress-test the parser.  
+
+### B2. BrickTree with Stable IDs
+- Every brick receives a unique, stable `BrickId` generated once.  
+- Types and props aligned with the shared registry, ensuring IDs in Masonry match AST node IDs in the Program.  
+
+### B3. Shared Registry / Config
+- Created a **single source of truth** for all brick types.  
+- Defined form (simple/compound/expression), AST kind, sockets, and prop mappings.  
+- Guaranteed Masonry ↔ Program semantics don’t drift.  
+
+---
+
+## Challenges & Solutions
+
+- **Challenge:** Keeping IDs consistent between Masonry and Program  
+  **Solution:** Stable ID generation and registry enforcement ensured 1:1 mapping  
+
+- **Challenge:** Handling nested compounds and socketed children  
+  **Solution:** Recursive parsing with explicit socket assignments  
+
+---
+
+## Key Learnings
+
+- Stable IDs are the backbone of reliable AST ↔ Program integration  
+- A shared registry prevents semantic drift between UI and execution  
+- Validating early gives far better developer/user feedback  
+
+---
+
+## Next Steps
+
+- Validate the tree before running.
+- Translate tree to AST deterministically
+- Register the plug ins needed by the towers
+
+---
+
+## Resources
+
+- [musicblocks-v4 Repository](https://github.com/sugarlabs/musicblocks-v4)  
+- [Documentation for AST compilation](https://docs.google.com/document/d/1C0t4iSze2eDEv6lWbloK3MnvJgAa6HvmXmk2sQ0lCZs/edit?tab=t.r7v91obun4vn#heading=h.gywsry3tia37)
+
+---
+
+## Acknowledgments
+
+Thanks to my mentors for their guidance through this milestone: bridging Masonry’s visual towers with actual program execution.