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Build Log — January 8, 2026

Build Log — January 8, 2026

📅 Daily Log — January 8, 2026

🧠 Context / Focus for Today

Enhance AI chat UX with progress tracking and time estimation. Improve AI coach reliability and workout scheduling with weekend preferences and better structured workout generation. Add multi-sport workout day preferences for personalized training plans. Improve navigation with Training Settings link.

✔️ Things I Got Done Today

AI Chat Progress Timer & Time Estimation

Progress Bar & Timer Display

  • Added progress bar showing elapsed vs estimated time during AI requests:
    • Visual progress indicator with elapsed/estimated time display
    • Time estimation based on intent type:
      • Plans: 15s base + 5s per week (scales with plan duration)
      • Edits: Fixed 10s estimate
      • Coach: Fixed 8s estimate
    • Response time displayed after completion for performance tracking
    • Rotating phase messages synchronized with progress phases

Intent Detection & Duration Parsing

  • Enhanced intent detection to extract plan duration:
    • Added extractDurationWeeks() function to parse duration from user input
    • Supports various formats ("4 weeks", "12 week plan", "8w", etc.)
    • Enables accurate time estimation for plan generation
    • Improved intent classification for better UX

State Management

  • Filtered stale loading messages from localStorage:
    • Prevents stale state from persisting across sessions
    • Cleans up loading messages on component mount
    • Improved chat state reliability

AI Coach Reliability & Workout Scheduling Improvements

Weekend Scheduling Preference

  • Added weekend preference for long runs and key workouts:
    • AI coach now prefers weekends for important training sessions
    • Better aligns with typical training schedules
    • Improves workout placement logic

Structured Workout Generation

  • Improved coach API for better structured workout generation:
    • Enhanced JSON parsing reliability
    • Disabled Gemini tool calling (JSON parsing produces better results)
    • Better error handling and validation
    • More consistent workout structure output

Chat History Filtering

  • Filter stale loading messages from Supabase chat history:
    • Prevents old loading states from appearing in chat
    • Cleaner chat history display
    • Improved user experience

Multi-Sport Workout Day Preferences

Database Schema

  • Added preferred_workout_days field to athlete profile:
    • JSONB column storing sport-specific day preferences
    • Supports run, bike, and swim day preferences
    • Flexible structure for future sport additions
    • Database migration with proper schema

Settings UI

  • Created settings page for workout day preferences:
    • User-friendly interface to select preferred days for each sport
    • Visual day selection (checkboxes for each day of week)
    • Sport-specific preferences (run/bike/swim)
    • Real-time updates to athlete profile
    • Integrated into /settings page

AI Coach Integration

  • Updated AI coach to enforce workout day preferences:
    • AI coach MUST schedule sport-specific workouts on user's preferred days
    • Validates workout placement against preferences
    • More personalized training plan generation
    • Better alignment with user's schedule and preferences

PRD Documentation

  • Created PRD for structured bike/swim workout generation:
    • Comprehensive product requirements document
    • Defines structured workout format for cycling and swimming
    • Outlines implementation approach and requirements
    • Guides future development work

Navigation Improvements

Training Settings Link

  • Added "Training Settings" link to user profile dropdown:
    • Quick access to /settings page
    • Improved navigation flow
    • Better discoverability of settings
    • Consistent with other navigation patterns

🚧 In Progress

  • AI chat UX improvements (progress timer complete, additional enhancements planned)
  • AI coach reliability (scheduling improvements complete, additional optimizations planned)
  • Multi-sport preferences (core functionality complete, additional sports and features planned)
  • Structured workout generation (PRD complete, implementation planned)

🎯 Targets for Tomorrow

  1. Continue AI chat enhancements — add more context-aware features and polish
  2. Implement structured bike/swim workouts — based on PRD requirements
  3. Expand multi-sport support — add more sports and preference options
  4. Improve AI coach scheduling — additional optimizations and edge case handling

🤔 Notes / Observations

  • Progress timer significantly improves user experience during AI requests
  • Time estimation helps set proper expectations for plan generation
  • Weekend scheduling preference aligns better with typical training schedules
  • Multi-sport workout day preferences enable highly personalized training plans
  • Training Settings link improves navigation and discoverability
  • PRD provides clear roadmap for structured bike/swim workout implementation
  • All changes maintain backward compatibility and include proper migrations
  • Strong focus on user experience and personalization

📈 Momentum Score: 9.0 / 10

Excellent day with significant UX improvements and personalization features. Progress timer makes AI interactions more transparent and engaging. AI coach reliability improvements enhance workout scheduling quality. Multi-sport preferences enable highly personalized training plans. Navigation improvements improve discoverability. Strong progress on user experience and personalization features that directly impact user satisfaction.