Promptly V0.6.2 P2 P3 Combined Update Log

# 🧾 Promptly v0.6.2 — Backend Update Log (P2 + P3 Combined)

This document merges **Phase 2 (P2)** and **Phase 3 (P3)** backend updates into a single authoritative changelog.  
Covers backend evolution toward Backend_TechSpec_v0.7 full closed-loop architecture.

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# ⭐ Phase 2 — v0.6.2-P2 Update Summary

## ✅ 1. Question Engine → Spec System Closed Loop (Core Delivery)

Aligned with Backend_TechSpec_v0.7 (“Wizard → Spec → Compiler” full loop).  
Question Engine (Agent C finalize) now triggers:

1. Generate raw spec  
2. Create new entry in `specs` table (version = 1)  
3. Compiler auto-generates compiled prompt  
4. Result saved into `compiled_prompts` table  

This is the **first fully functional closed-loop** of Promptly.

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## ✅ 2. Agent C Refactored → “Spec Raw Builder”

To match design principles:

- Agent C no longer generates final prompts  
- Agent C now only:
  - Converts Q/A → high-level structured Spec (JSON)  
  - Outputs explanation for UI  
- Prompt Blocks are produced entirely by **specCompiler.js**  
  (aligns with Backend_Spec_v0.7)

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## ✅ 3. Updated Compiler (compileSpecToPrompt)

Compiler now implements:

- structured blocks  
- deterministic ordering  
- alignment with Spec v0.7  

Output blocks include:

- system  
- project goal  
- requirements  
- constraints  
- architecture  
- output instructions  
- explanation  

Compatible with frontend UI consumption.

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## ✅ 4. server.js Updates (P2)

- Mounted full Spec System routes  
- Mounted Question Engine finalize workflow  
- Improved error handling  
- Integrated Compiler + Agent C flow  
- Backend version updated → **v0.6.2-P2**

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## 📁 P2 ZIP Structure (Updated)