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First working draft of the exteion
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‎visualstudio-extension/DEBUGGING-GUIDE.md‎

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# Debugging the Extension - Zero Token Count Issue
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## How to View Logs
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1. **Press F5** to start debugging (or use the experimental instance if already running)
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2. In the experimental instance:
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- Go to **View > Output** (or press `Ctrl+Alt+O`)
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- In the dropdown **"Show output from:"**, select **"Copilot Token Tracker"**
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## What the Logs Will Tell You
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When the toolbar shows "0 | 0", check these log entries:
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### 1. Extension Initialization
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```
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[HH:mm:ss] === Copilot Token Tracker Extension Starting ===
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[HH:mm:ss] Package GUID: 6B8CA5B3-1A9F-4C2E-8F3D-7E2A1B4C9D0F
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[HH:mm:ss] Initializing commands...
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[HH:mm:ss] === Extension Initialized Successfully ===
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```
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✅ **Good**: Extension loaded properly
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### 2. Session Discovery
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```
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[HH:mm:ss] Refreshing token stats...
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[HH:mm:ss] Starting stats build...
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[HH:mm:ss] Discovering sessions from logs...
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[HH:mm:ss] Checking log directory: C:\Users\[username]\AppData\Local\Temp\VSGitHubCopilotLogs
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[HH:mm:ss] Found X log files
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[HH:mm:ss] Found Y sessions from logs
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```
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**Possible Issues:**
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- ❌ **"Log directory not found"**: Visual Studio hasn't created Copilot Chat logs yet
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- ❌ **"Found 0 log files"**: No recent Copilot Chat activity
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- ❌ **"Found 0 sessions from logs"**: Log files don't contain session paths
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### 3. Filesystem Discovery
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```
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[HH:mm:ss] Discovering sessions from filesystem...
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[HH:mm:ss] Scanning filesystem starting from home: C:\Users\[username]
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[HH:mm:ss] Added scan root: C:\repos
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[HH:mm:ss] Added scan root: C:\code
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[HH:mm:ss] Found copilot-chat dir: C:\path\to\.vs\solution\copilot-chat
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[HH:mm:ss] Found Z session files in: C:\path\to\.vs\solution\copilot-chat\hash\sessions
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[HH:mm:ss] Found N additional sessions from filesystem
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```
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**Possible Issues:**
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- ❌ **No "Found copilot-chat dir" messages**: No Visual Studio solutions with Copilot Chat usage
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- ❌ **"Found 0 session files"**: The sessions directory exists but is empty
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### 4. Stats Aggregation
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```
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[HH:mm:ss] Discovered M session files
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[HH:mm:ss] Successfully parsed P sessions
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[HH:mm:ss] Stats aggregated - Today: 1,234, Last30Days: 45,678
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[HH:mm:ss] Stats updated: Today=1234, Last30Days=45678
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```
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**Possible Issues:**
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- ❌ **"Discovered 0 session files"**: No sessions found anywhere
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- ❌ **"Successfully parsed 0 sessions"**: Session files exist but couldn't be parsed (wrong format/corrupted)
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- ❌ **"Today: 0, Last30Days: 0"**: Sessions parsed but all are older than 30 days OR token data missing
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## Common Causes of "0 | 0"
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### 1. Never Used Visual Studio Copilot Chat
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The extension only tracks **Visual Studio Copilot Chat** sessions, not VS Code or GitHub.com.
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**Solution**: Use Copilot Chat in Visual Studio at least once:
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- Open Copilot Chat pane: **View > Copilot Chat**
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- Ask a question
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- Wait 5 minutes for the extension to refresh stats
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### 2. Session Files in Unexpected Location
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The extension looks for session files in:
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- Log path: `%LOCALAPPDATA%\Temp\VSGitHubCopilotLogs\*.chat.log`
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- Filesystem: `.vs\{solution}\copilot-chat\{hash}\sessions\`
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**Solution**: Check the log output to see what paths it's scanning and compare with where your session files actually are.
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### 3. Old Session Files
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If all your Copilot Chat usage is older than 30 days, both "Today" and "Last30Days" will be zero.
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**Solution**: Use Copilot Chat in the current Visual Studio session.
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### 4. Parsing Failures
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Session files might exist but fail to parse (format changes, corruption, etc.).
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**Solution**: Look for ERROR messages in the logs about parsing failures.
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## Next Steps
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After reviewing the logs, you'll know:
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1. ✅ Are session files being discovered?
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2. ✅ Are they being parsed successfully?
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3. ✅ Are they within the 30-day window?
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4. ✅ Do they contain token usage data?
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Share the relevant log entries and I can help debug further!

‎visualstudio-extension/src/CopilotTokenTracker/.vs/CopilotTokenTracker.csproj.dtbcache.json‎

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‎visualstudio-extension/src/CopilotTokenTracker/Commands/ShowTokenTrackerCommand.cs‎

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@@ -37,6 +37,9 @@ public static async Task InitializeAsync(AsyncPackage package)
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private void Execute(object sender, EventArgs e)
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{
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ThreadHelper.ThrowIfNotOnUIThread();
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Utilities.OutputLogger.Log("ShowTokenTrackerCommand executed - opening tool window");
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_ = _package.JoinableTaskFactory.RunAsync(async () =>
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{
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var window = await _package.ShowToolWindowAsync(
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if (window is ToolWindow.TokenTrackerToolWindow trackerWindow)
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{
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Utilities.OutputLogger.Log("Tool window opened, refreshing data...");
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await trackerWindow.RefreshAsync();
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Utilities.OutputLogger.Log("Data refresh completed");
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}
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else
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{
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Utilities.OutputLogger.LogWarning("Tool window opened but type cast failed");
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}
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});
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}

‎visualstudio-extension/src/CopilotTokenTracker/Commands/ToolbarInfoCommand.cs‎

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using System;
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using System.ComponentModel.Design;
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using System.Globalization;
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using System.Threading;
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using CopilotTokenTracker.Data;
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using Microsoft.VisualStudio.Shell;
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using Microsoft.VisualStudio.Shell.Interop;
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using Task = System.Threading.Tasks.Task;
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namespace CopilotTokenTracker.Commands
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{
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/// <summary>
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/// Shows token usage in both the VS status bar (bottom) and the custom toolbar.
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///
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/// The status bar text is re-applied every 10 seconds because VS frequently
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/// overwrites it with "Ready". Stats are fetched every 5 minutes; the cached
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/// text is written to the status bar on the faster cadence.
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/// </summary>
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internal sealed class ToolbarInfoCommand
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{
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public static readonly Guid CommandSet = new Guid(ShowTokenTrackerCommand.CommandSetGuidString);
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public const int CommandId = 0x0200;
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private static readonly TimeSpan StatsRefreshInterval = TimeSpan.FromMinutes(5);
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private static readonly TimeSpan StatusBarTickInterval = TimeSpan.FromSeconds(10);
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private readonly AsyncPackage _package;
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private readonly OleMenuCommand _menuCommand;
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private Timer? _statsTimer;
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private Timer? _statusBarTimer;
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/// <summary>Cached text written to the status bar on every tick.</summary>
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private volatile string _statusText = "Copilot: loading\u2026";
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private ToolbarInfoCommand(AsyncPackage package, OleMenuCommandService commandService)
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{
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_package = package ?? throw new ArgumentNullException(nameof(package));
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var id = new CommandID(CommandSet, CommandId);
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_menuCommand = new OleMenuCommand(OnClick, id);
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commandService.AddCommand(_menuCommand);
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// Fetch stats after a short delay, then every 5 minutes
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_statsTimer = new Timer(
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_ => _package.JoinableTaskFactory.RunAsync(async () => await RefreshStatsAsync()),
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null,
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TimeSpan.FromSeconds(3),
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StatsRefreshInterval);
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// Re-apply cached text to the status bar every 10 seconds
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_statusBarTimer = new Timer(
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_ => _package.JoinableTaskFactory.RunAsync(async () => await WriteStatusBarAsync()),
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null,
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TimeSpan.FromSeconds(5),
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StatusBarTickInterval);
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}
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public static async Task InitializeAsync(AsyncPackage package)
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{
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await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(package.DisposalToken);
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Utilities.OutputLogger.Log("Initializing ToolbarInfoCommand...");
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var svc = await package.GetServiceAsync(typeof(IMenuCommandService)) as OleMenuCommandService
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?? throw new InvalidOperationException("IMenuCommandService unavailable.");
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_ = new ToolbarInfoCommand(package, svc);
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Utilities.OutputLogger.Log("ToolbarInfoCommand initialized - timers started");
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}
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/// <summary>Fetch fresh stats and update both toolbar button and cached status text.</summary>
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private async Task RefreshStatsAsync()
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{
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try
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{
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var stats = await StatsBuilder.BuildAsync();
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var today = FormatTokenCount(stats.Today.Tokens);
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var last30 = FormatTokenCount(stats.Last30Days.Tokens);
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var text = $"Copilot: {today} | {last30}";
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_statusText = text;
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await _package.JoinableTaskFactory.SwitchToMainThreadAsync(_package.DisposalToken);
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_menuCommand.Text = text;
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}
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catch
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{
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_statusText = "Copilot: error";
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try
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{
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await _package.JoinableTaskFactory.SwitchToMainThreadAsync(_package.DisposalToken);
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_menuCommand.Text = _statusText;
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}
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catch { /* package may be disposed */ }
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}
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}
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/// <summary>Write the cached status text to the VS status bar.</summary>
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private async Task WriteStatusBarAsync()
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{
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try
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{
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await _package.JoinableTaskFactory.SwitchToMainThreadAsync(_package.DisposalToken);
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if (await _package.GetServiceAsync(typeof(SVsStatusbar)) is IVsStatusbar statusBar)
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{
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statusBar.SetText(_statusText);
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}
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}
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catch { /* ignore — VS may be shutting down or package disposed */ }
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}
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private static string FormatTokenCount(long tokens)
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{
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if (tokens >= 1_000_000)
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return (tokens / 1_000_000.0).ToString("0.#", CultureInfo.InvariantCulture) + "M";
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if (tokens >= 1_000)
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return (tokens / 1_000.0).ToString("0.#", CultureInfo.InvariantCulture) + "K";
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return tokens.ToString("N0", CultureInfo.InvariantCulture);
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}
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private void OnClick(object sender, EventArgs e)
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{
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_ = _package.JoinableTaskFactory.RunAsync(async () =>
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{
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var window = await _package.ShowToolWindowAsync(
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typeof(ToolWindow.TokenTrackerToolWindow),
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id: 0,
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create: true,
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cancellationToken: _package.DisposalToken);
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if (window is ToolWindow.TokenTrackerToolWindow trackerWindow)
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{
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await trackerWindow.RefreshAsync();
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}
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});
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}
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}
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}

‎visualstudio-extension/src/CopilotTokenTracker/CopilotTokenTracker.csproj‎

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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<!-- Source files -->
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<ItemGroup>
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<Compile Include="CopilotTokenTrackerPackage.cs" />
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<Compile Include="Commands\ShowTokenTrackerCommand.cs" />
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<Compile Include="Commands\ToolbarInfoCommand.cs" />
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<Compile Include="Data\Models.cs" />
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<Compile Include="Data\SessionDiscovery.cs" />
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<Compile Include="Data\SessionParser.cs" />
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<DependentUpon>Settings.settings</DependentUpon>
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</Compile>
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<Compile Include="ToolWindow\TokenTrackerToolWindow.cs" />
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<Compile Include="Utilities\OutputLogger.cs" />
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<Compile Include="WebBridge\ThemedHtmlBuilder.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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</ItemGroup>
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<!-- WPF XAML -->
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<ItemGroup>
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<Page Include="ToolWindow\TokenTrackerControl.xaml">
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<DependentUpon>TokenTrackerControl.xaml</DependentUpon>
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</Compile>
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</ItemGroup>
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<!-- VSIX manifest -->
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<ItemGroup>
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<None Include="Properties\Settings.settings">
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<SubType>Designer</SubType>
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</None>
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</ItemGroup>
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<!-- VSCT: VS Command Table definition (menus / commands) -->
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<ItemGroup>
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<VSCTCompile Include="CopilotTokenTrackerPackage.vsct">
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<ResourceName>Menus.ctmenu</ResourceName>
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</VSCTCompile>
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</ItemGroup>
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<!-- Embedded resources -->
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<ItemGroup>
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<EmbeddedResource Include="WebBridge\vscode-shim.js" />
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</ItemGroup>
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<!-- Framework references -->
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<ItemGroup>
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<Reference Include="System" />
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<Reference Include="WindowsBase" />
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<Reference Include="System.Xaml" />
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</ItemGroup>
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<!-- NuGet packages -->
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<ItemGroup>
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<PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.6.36389" ExcludeAssets="runtime" NoWarn="NU1604" />
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<PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
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<PackageReference Include="System.Text.Json" Version="8.0.5" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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<Import Project="$(VSToolsPath)\VSSDK\Microsoft.VsSDK.targets" Condition="'$(VSToolsPath)' != ''" />
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<!--
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Copy webview JS bundles from the vscode-extension build output into this project's
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webview\ folder so they can be packaged inside the VSIX.
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<Copy SourceFiles="@(_WebviewBundle)" DestinationFolder="$(MSBuildProjectDirectory)\webview\" SkipUnchangedFiles="true" ContinueOnError="true" />
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<Message Importance="high" Text="Copied webview bundles from vscode-extension/dist/webview/ — rebuild vscode-extension if they are missing." />
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</Target>
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<!-- Include copied webview JS files inside the VSIX package -->
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<ItemGroup>
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<Content Include="webview\*.js" Condition="Exists('$(MSBuildProjectDirectory)\webview')">
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<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
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</Content>
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</ItemGroup>
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</Project>
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</Project>

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