[Bug] Auto-Compact subagent context incorrectly counted in main context window

Bug Description
I was at 85% context usage and started to auto-compact. I canceled that, and then resumed the session, and now I'm at 17%. Did the massive amount of subagents accidentally count against my main context window?

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.91
• Feedback ID: 268cfaf6-9e85-46d6-8ec0-c768e36d0d1f

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/Tyler Laprade/.local/share/claude/versions/2.1.91 (expected in multi-process scenarios)\n    at Am_ (/$bunfs/root/src/entrypoints/cli.js:1899:2153)\n    at jl6 (/$bunfs/root/src/entrypoints/cli.js:1899:1233)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-03T18:27:48.816Z"}]