Session Log — TechTown Acoustics 2.0

[03:00–03:45] Phase 0: Initial Analysis

• Received 9 project files (2 PNG, 2 DXF, 5 LLM reference texts)
• Created Reports/2026-03-04_Project-Analysis-Report.html
• Identified discrepancies between 4 LLMs (Gemini, Grok, ChatGPT, Claude Web)
• Posed 10 questions to user

[03:45–04:00] User Answers Received

• All 10 questions answered
• Key decisions: yellow zone only, 4 separate rooms, conservative NC, no budget cap
• All 15 agreed facts confirmed
• Buffer spine NOT selected at this stage

[04:00–04:30] Phase 1: Geometry & Area

• DXF layer extraction (furniture: 44 layers, HVAC: 137 layers)
• All 9 B3.png dimensions verified in DXF
• Independent area calculation: 29.13 m² (trapezoid formula)
• Created Reports/2026-03-04_v01_Phase-1-Geometry-Report.html
• Created Calculations/2026-03-04_v01_Area-Calculation.md
• Created Scope/2026-03-04_v01_Locked-Scope.html
• Created PROJECT-INDEX.html
• Created folder structure (12 folders)

[04:30–05:00] New DXF Comparison

• Received updated furniture DXF from architect (Sarah)
• Compared: new (7.7 MB, 25,274 entities) vs old (6.9 MB, 21,727 entities)
• Structural geometry IDENTICAL — no calc changes needed
• Archived new file: Source/2026-03-04_Furniture-Layout-Original-AutoCAD.dxf

[05:00–05:30] User Cross-Session Data

• User shared notes from parallel LLM session (Gemini/Grok)
• Major scope updates:
  • Ceiling: 2.9 m → 3.5 m to concrete slab
  • Buffer spine: NOT SELECTED → REQUIRED
  • NC targets refined: Control/Video NC-20 → NC-25
  • VO live room expanded: solo VO → 2-3 vocalists + instrument
  • HVAC system: Samsung DVM → Daikin VRF (corrected later)

[05:30–05:45] Phase 2: Layout Options

• Created 3 room layout options with SVG floor plans
• Created Reports/2026-03-04_v01_Phase-2-Layout-Options.html
• Option A recommended (Dual Zone + Central Spine)
• Critical finding: 35-46% area deficit vs ideal minimums
• 6 questions posed for layout selection

[05:45–06:15] HVAC Coordination

• User shared HVAC contractor communication thread
• SCOPE CORRECTION: System is Daikin VRF, not Samsung DVM
• Created HVAC/2026-03-04_v01_HVAC-Coordination-Log.md
• "Last mile" modification approach confirmed

[06:15–06:30] HVAC DXF Analysis

• Verified furniture DXF has ZERO HVAC content
• Archived HVAC DXF: Source/2026-03-04_v01_HVAC-All-Floors.dxf
• Extracted 33 HVAC layers, 4 indoor units near B3
• Created HVAC/2026-03-04_v01_HVAC-Equipment-Map.md
• Plenum box sizing, silencer constraints, NC budget calculated

[06:30–06:45] Zone Map for Gemini

• Established coordinate transformation: HVAC_X = Furniture_X x 1000 + 203,000
• Mapped VRF units to yellow zone coordinates
• Critical finding: only U380 inside/near zone (SE corner)
• Created HVAC/2026-03-04_v01_B3-Zone-Map-HVAC.html (1:50 SVG map)
• Created HVAC/2026-03-04_v01_Zone-Numbers-For-Gemini.md

[06:45–06:50+] Full Project Audit (in progress)

• Full folder listing: 22 files, 14 directories
• File size and MD5 hash verification
• Identified stale data in Locked Scope v01
• Identified DXF version discrepancy (root vs Source)
• Context limit reached — audit continued in new session

[Continued Session] Audit Completion

• Moved 4 loose root files to Source/ with proper naming
• Read and verified all HTML report contents
• Cross-checked technical data across all documents
• Created comprehensive audit report
• Updated PROJECT-INDEX with missing HVAC file links