Changelog

What's new in MechaDataCleaner

v1.0.0December 30, 2025Latest

Production Launch Highlights

  • •Unified producers/consumers: Everyone now sees the same chat-driven cleaning workspace with batch jobs, audit logs, and BI-ready exports.
  • •Assistant-first navigation: The Mecha chat assistant is pinned across every step so teams can resolve data issues faster.
  • •Power BI handoff: Exports now include DAX-ready measures, audit trails, and optional date-key columns out of the box.
v0.7.0December 18, 2025

Chat UX + Date Keys

  • •Chat actions now apply instantly: One-click fixes (e.g., handle missing values) run with a spinner and show success feedback.
  • •Cleaner chat UI: Removed the persistent large-dataset warning while keeping the analysis spinner.
  • •Date keys simplified: Replaced two dependent checkboxes with a single dropdown (none / add / replace) for clearer choices.
  • •Upload + missing-value stability: Improved uploader reset/persistence and fixed missing-value fallback errors in the assistant flow.
v0.6.7December 13, 2025

Premium Features & Performance

  • •Data Quality Metrics: Before/after comparison with completeness, validity, and quality scores
  • •Side-by-Side Preview: See original vs cleaned data with change highlighting
  • •Audit Log: Download JSON log of all transformations applied
  • •Custom Rules Builder: Create find/replace, conditional, and regex transformation rules
  • •Batch Upload: Process multiple tables at once, download as ZIP
  • •Performance: Lazy loading reduces startup time by ~6 seconds
v0.6.6December 12, 2025

Mecha Data Chat Assistant

  • •Ask natural language questions about your data
  • •AI understands data context (columns, types, sample values, validation results)
  • •Suggests actionable fixes with one-click apply
  • •Cost-optimized: Uses GPT-4o-mini for chat (~92% performance at 6% cost)
v0.6.5December 12, 2025

Unified DAX Generation & AI Table Role Detection

  • •Combined pattern recognition with AI for smarter DAX generation
  • •AI-enhanced table role detection (Fact/Dimension/Bridge)
  • •Table naming recommendations (e.g., 'customers' → 'dim_customers')
  • •Optional prefix application to exported filenames
v0.6.4December 12, 2025

Power BI Ready Mode

  • •One-click optimization for Power BI data sources
  • •Column sanitization (removes spaces, special chars)
  • •Date standardization and boolean normalization
  • •IsCurrent and IsLatestSnapshot DAX flags
  • •Date table recommendations
v0.6.3December 2025

Advanced Validation & Data Quality

  • •Pandera schema validation with custom rules
  • •SweetViz data profiling reports
  • •Outlier detection (IQR and Z-score methods)
  • •Missing value analysis and handling
  • •Text normalization and date standardization
v0.6.0December 2025

AI-Powered Schema Inference

  • •GPT-4o powered schema analysis and refinement
  • •Automatic column type detection with confidence scores
  • •Semantic type suggestions (email, phone, currency, etc.)
  • •DAX measure generation for Power BI

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