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Build Log — January 30, 2026

Build Log — January 30, 2026

Context / Focus for Today

Automation and integration day: Intervals.icu auto-sync, Planning Board cloud sync, quick-add API for external automations, compound learning scripts, and Garmin token race condition fixes.

Things I Got Done Today

Auto-Sync to Intervals.icu (Major Feature)

Seamless Zwift Integration

  • Add auto_sync_enabled column to intervals_integrations table
  • Create /api/intervals/auto-sync endpoint to toggle setting
  • Update /api/intervals/status to return autoSyncEnabled
  • Add auto-sync toggle UI in IntervalsConnection component
  • Fix external_id to use stable workout ID (enables updates vs duplicates)
  • Create client-side (lib/intervalsAutoSync.ts) and server-side (lib/intervals/autoSync.ts) helpers
  • Hook up auto-sync after workout saves in TrainingCalendarApp

When enabled, bike/run workouts automatically sync to Intervals.icu after saving, which then syncs to Zwift's workout library.

Planning Board Cloud Sync (Major Feature)

Supabase-Backed Kanban

  • Hybrid storage: Supabase for authenticated users, localStorage fallback
  • Create usePlanningBoard hook for unified state management
  • Add supabaseBoard.ts service layer mirroring localBoard API
  • Support archived_at column for archive feature
  • Add bulk archive endpoint POST /api/planning/archive-done
  • Show dynamic sync status badge (Local/Syncing/Synced/Error)
  • Add migration prompt for localStorage → cloud migration

Enables direct database interaction via Supabase MCP tools (Claude Code can now manage the kanban board directly).

Quick-Add API (Feature)

External Automation Support

  • POST /api/planning/quick-add with API key auth
  • Rate limited to 50 tasks/day for security
  • Designed for iOS Shortcuts, Clawdbot, Zapier
  • Returns task ID and status for confirmation

Compound Automation (Feature)

Nightly Learning & Implementation

Implements Ryan Carson's compound engineering workflow adapted for Windows + Claude Code:

  • daily-compound-review.ps1: Extracts learnings from sessions, updates docs
  • auto-compound.ps1: Implements top priority from reports, creates PRs
  • loop.ps1: Ralph-style execution loop for iterative task completion
  • setup.ps1: Windows Task Scheduler configuration

Scheduled tasks:

  • 5:00 PM: KeepAwake (prevents sleep)
  • 10:30 PM: CompoundReview (extract learnings)
  • 11:00 PM: AutoCompound (implement next priority)

Garmin Token Refresh Fix (Bug Fix)

Race Condition Prevention

  • Add promise-based lock pattern to prevent token refresh race conditions
  • When multiple API calls fail with 401 simultaneously, they now wait for a single refresh
  • Add retry queue for in-flight requests during token refresh
  • Queued requests automatically retry with new token once refresh completes
  • Prevents wasted API quota and potential token invalidation

Documentation & UX

Planning Board Instructions

  • Add Planning Board workflow triggers to CLAUDE.md
  • Document how to add, move, and archive tasks via Supabase MCP tools
  • Add iOS Shortcut quick-add API documentation

Intervals.icu Export UX

  • Rename "Export to Zwift" to "Export to Intervals.icu" for clarity
  • Fix 403 error by passing athlete ID to OAuth client
  • Update dialog descriptions to reflect Intervals.icu destination

AI Support Agent Plan

  • Comprehensive plan for customer support AI agent
  • Auto-routing between coach and support modes
  • Action tools (check account, integrations, create tickets, escalate)
  • RAG knowledge base that learns from resolved tickets
  • 4-sprint implementation timeline

Claudeception Skills

  • Extract intervals-icu-description-parsing skill (ZWO NaN fix)
  • Extract typescript-discriminated-unions skill (type narrowing patterns)

Commits Today

  • 9 commits covering automation, integrations, and fixes
  • Major: Auto-sync Intervals.icu (40da035)
  • Major: Planning Board cloud sync (ef89a2d)
  • Feature: Quick-add API (7065b0d)
  • Feature: Compound automation (7e04eda)
  • Fix: Garmin token race conditions (1b0ffa8)
  • Docs: Planning Board instructions (ee0500d)
  • Docs: AI support agent plan (34586e6)

In Progress

  • Compound automation testing on scheduled runs
  • Intervals.icu auto-sync verification
  • Support agent implementation (Sprint 1)

Targets for Tomorrow

  1. Compound automation — Verify nightly tasks run correctly
  2. Auto-sync testing — Confirm Zwift receives workouts via Intervals.icu
  3. Support agent — Begin Sprint 1 implementation
  4. Mobile UX — Continue High Density Precision polish

Notes / Observations

  • Auto-sync to Intervals.icu completes the Zwift workflow: save workout → auto-sync → appears in Zwift
  • Planning Board cloud sync enables Claude Code to directly manage tasks via Supabase MCP tools
  • Quick-add API opens up iOS Shortcuts, Zapier, and other automation possibilities
  • Compound automation adopts Ryan Carson's approach: nightly learning extraction + priority implementation
  • Garmin race condition fix is defensive but important—prevents token corruption under load
  • Two claudeception skills extracted from recent debugging sessions
  • AI support agent plan is ambitious but well-scoped across 4 sprints

Momentum Score: 8 / 10

Strong automation focus today. Auto-sync Intervals.icu removes manual export friction. Planning Board cloud sync enables direct kanban management from Claude Code. Quick-add API opens external automation options. Compound automation is exciting—nightly automated learning and implementation. Garmin token fix addresses a real concurrency issue. Slightly lower than yesterday's 10/10 only because features are more infrastructure-focused than user-facing, but these improvements compound over time (pun intended).