From 82acd7dcbf9263b1ab16ad8e36113c89b188dab7 Mon Sep 17 00:00:00 2001
From: Erik Darling <2136037+erikdarlingdata@users.noreply.github.com>
Date: Thu, 26 Mar 2026 18:24:32 -0400
Subject: [PATCH] Remove temporary context file

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-# Session Context — 2026-03-26 08:15
-
-## Current Task
-Starting #689/#691 — Progressive server summary landing view with USE/RED/Golden Signals framing. These are being implemented together. Design sketch is on issue #691.
-
-## Decisions Made
-
-### Session-wide
-- Overlay on the slicer canvas, never on ScottPlot charts on other tabs (feedback saved)
-- Dots not lines for overlays — every execution gets a dot, no minimum threshold
-- Drill-down window ±30 min (±15 was too narrow, missed data due to spike chart zero-baseline rendering)
-- Custom date pickers must be populated on drill-down so user can explore other tabs
-- `_isRefreshing` guard needed on CustomDateRange_Changed/CustomTimeCombo_Changed/TimeRangeCombo_SelectionChanged to prevent cascading refreshes during programmatic picker updates
-- Chart drill-down added to all major charts, skipping Resource Metrics detail charts and Query Performance Trends pending #689/#691 consolidation
-- DuckDB path migrated to `%LOCALAPPDATA%\PerformanceMonitorLite\monitor.duckdb` — the old `bin/Debug` path has stale data
-
-### #689/#691 Design
-- Combined implementation: #691 provides framework vocabulary, #689 provides the UI
-- Replaces default landing tab (Wait Stats in Lite, Resource Overview in Dashboard)
-- All data sources already exist — aggregation + presentation only
-- Lite first, then Dashboard port
-- Investigate buttons reuse #684 pattern
-- USE Method sections: CPU, Memory, Disk I/O, TempDB, Workers (each with Utilization/Saturation/Errors)
-- RED Method section: Rate, Errors, Duration
-- Recent Incidents section: ranked problems with navigate links
-- Full design sketch posted on issue #691
-
-## Work Completed This Session
-
-### Issues closed:
-- #676 — CREATE DATABASE model DB size fix (PR #678)
-- #677 — Azure SQL DB server_id collision (community PR #680)
-- #681 — Slicer time range fixes + new slicers (PRs #697, #698)
-- #683 — Grid-to-slicer dot overlay (PRs #699, #700, #701)
-- #684 — Critical Issues investigate button (PR #702)
-- #682 — Chart drill-down (PRs #705, #706, #708, #709, #711, #714, #717)
-- #704 — Slicer custom range display fix (PR #707)
-- #694 — Support question answered
-- #695 — sp_BlitzLock debugging comment posted
-
-### Key PRs:
-- All merged to dev via squash+admin
-- Branch protection requires PRs — cannot push directly to dev
-
-## Work Remaining
-
-### Immediate: #689/#691
-- New `ServerSummaryControl` UserControl for Lite
-- Data aggregation queries pulling from existing DuckDB tables
-- USE/RED framework categorization
-- Severity thresholds per signal
-- Navigate-to-tab actions (pattern from #684)
-- Dashboard port after Lite validation
-
-### Deferred:
-- #686 — Unified query detail panel (too much work, needs #689 first)
-- #685 — Inline sparklines in grids
-- #687 — Before/after comparison for query grids
-- #688 — Correlated timeline lanes
-- #690 — Heatmap for query duration
-- #692 — Dynamic baselines (foundation for #693)
-- #693 — Anomaly detection
-- #696 — XE sessions stay running after Lite closes (design choice)
-- Dashboard port of remaining Resource Metrics drill-downs (post #689)
-- Dashboard chart time display mode for ScottPlot charts (pre-existing issue)
-
-## Important Context
-
-### File paths
-- Lite slicer: `Lite/Controls/TimeRangeSlicerControl.xaml.cs`
-- Dashboard slicer: `Dashboard/Controls/TimeRangeSlicerControl.xaml.cs`
-- Lite ServerTab: `Lite/Controls/ServerTab.xaml.cs` (~4500 lines)
-- Dashboard ServerTab: `Dashboard/ServerTab.xaml.cs` (~2000 lines)
-- Dashboard QueryPerformanceContent: `Dashboard/Controls/QueryPerformanceContent.xaml.cs`
-- DuckDB path: `C:/Users/edarl/AppData/Local/PerformanceMonitorLite/monitor.duckdb` (NOT the bin/Debug path)
-
-### Timezone notes
-- Server (sql2022): Pacific time (UTC-7 DST / UTC-8 standard)
-- User machine: Eastern time (UTC-4 DST / UTC-5 standard)
-- `ServerTimeHelper.UtcOffsetMinutes` is the SERVER's offset from UTC
-- Chart X-axis data is in server local time (UTC + UtcOffsetMinutes)
-- Hover helper returns server local time
-- Date pickers show user's local time
-- DuckDB stores collection_time in UTC
-
-### Git workflow
-- ALWAYS use feature branches + PRs (branch protection on dev and main)
-- `gh pr merge --squash --admin` to merge
-- Never push directly to dev — will be rejected
-
-### Build issues
-- `taskkill` not reliably killing processes this session — Defender or runtime holding file locks
-- User has to manually close apps before rebuild
-- Dashboard MCP server can also hold DLL locks