GitHub Copilot usage is active, but Splitrail reports 0 tokens

[STom1c]

Expected Behavior

Non-zero token usage on active days (inputTokens, outputTokens, cachedTokens).

Actual Behavior

All metrics show zero:

• inputTokens: 0
• outputTokens: 0
• cachedTokens: 0
• costCents: 0
• toolCalls: 0

Evidence

GitHub Copilot transcript analysis (2026-06-02+):

• 3 sessions
• 66 user messages
• 350 assistant messages

This proves active usage during the period Splitrail reports all zeros.

Environment

• Splitrail: v3.5.4
• VS Code: v1.123.0
• GitHub Copilot Chat: v0.51.0
• OS: macOS

Root Cause Hypothesis

GitHub Copilot log schema may have changed. Splitrail analyzer is likely no longer extracting token fields correctly from the transcript format.