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Development Log

Track AI-assisted development sessions, prompts, and manual reviews.

Log Template

### YYYY-MM-DD - [Task Name]
**Prompt Summary:** [Brief description of what was requested]
**AI Actions:** [What the AI did - files created/modified, commands run]
**Manual Review:** [Your observations, tests, changes made by hand]
**Status:** [✓ Complete | ⚠ Needs work | ⏸ Paused]

Entries

2026-01-28 - Initial Scaffold & Data Generator

Prompt Summary: Create project structure, requirements.txt, sample_data generator with dirty rows, and generate initial CSV files with 200 properties and 600 events.

AI Actions:

  • Created requirements.txt (pandas only)
  • Created outputs/.gitkeep placeholder
  • Created scripts/generate_synth_data.py with synthetic data generator
  • Generated sample_data/properties.csv (220 rows including duplicates)
  • Generated sample_data/events.csv (660 rows including duplicates)
  • Injected ~15% dirty rows: invalid APNs, bad dates, negative values, unknown enum values, FK violations

Manual Review:

  • Verified CSV files generated successfully
  • Spot-checked dirty rows present in raw data
  • Confirmed APN format variations and duplicate keys exist
  • Lag simulation appears realistic per source type

Status: ✓ Complete

2026-01-28 - Core Validator Implementation

Prompt Summary: Implement validator.py end-to-end with all validation rules, deduplication, rejection tracking, and statistics reporting.

AI Actions:

  • Created validator.py with full validation pipeline
  • Implemented column normalization and string trimming
  • Added APN regex validation (XXX-XXX-XX format)
  • Added foreign key check (events.apn → properties.apn)
  • Implemented deduplication logic (newest timestamp wins)
  • Added lag calculation by source
  • Added postponement counting per APN
  • Generated all three output files with proper violation_reason column

Manual Review:

  • Ran validator on sample data: 82.7% properties pass, 77.6% events pass
  • Verified rejected_rows.csv contains violation_reason with semicolon-separated multiple violations
  • Confirmed no crashes on malformed data
  • Spot-checked lag hours realistic: attorney_update ~5h, trustee_site ~13h, aggregator ~28h
  • Tested with custom file paths via command-line args

Status: ✓ Complete

2026-01-28 - Documentation & Deployment Setup

Prompt Summary: Create README.md with exact commands and rules, DEV_LOG.md template with examples, and vercel_signpost/index.html landing page.

AI Actions:

  • Created README.md with quick start, validation rules, statistics, and Vercel deployment instructions
  • Created DEV_LOG.md with template and 3 example log entries
  • Created vercel_signpost/index.html landing page with project overview

Manual Review:

  • Verified README setup and run commands execute end-to-end
  • Confirmed signpost renders correctly on desktop and mobile widths
  • Spot-checked GitHub links and feature bullets for accuracy

Status: ✓ Complete

Notes

  • Keep entries concise but specific enough to understand decisions later
  • Include command outputs or error messages if relevant
  • Note any deviations from original requirements
  • Track technical debt or future improvements here