[Bug] Context limit exceeded with multiple subagents causes unrecoverable session state

Bug Description
Whenever more than 4-5 subagents are launched at once, their combined outputs force a "context limit reached" error that breaks the session and makes it impossible to compact.

Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.1.41
• Feedback ID: 8afb8a8a-d9c6-4e24-b6ec-98d13a498c55

Errors

[{"error":"Error: 1P event logging: 9 events failed to export (code=ECONNREFUSED, ECONNREFUSED)\n    at queueFailedEvents (/$bunfs/root/claude:2105:2350)\n    at async doExport (/$bunfs/root/claude:2105:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:05:57.966Z"},{"error":"Error: {\"message\":\"Failed to export 9 events (code=ECONNREFUSED, ECONNREFUSED)\",\"originalLine\":\"2105\",\"originalColumn\":\"1409\",\"line\":\"2105\",\"column\":\"1409\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Failed to export 9 events (code=ECONNREFUSED, ECONNREFUSED)\\n    at doExport (/$bunfs/root/claude:2105:1409)\\n    at processTicksAndRejections (native:7:39)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:2148:25028)\n    at <anonymous> (/$bunfs/root/claude:2100:20181)\n    at pm7 (/$bunfs/root/claude:2100:20725)\n    at <anonymous> (/$bunfs/root/claude:2101:17366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:05:57.966Z"},{"error":"Error: Connection error.\n    at makeRequest (/$bunfs/root/claude:366:4548)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:05:59.619Z"},{"error":"SyntaxError: JSON Parse error: Unexpected identifier \"API\"\n    at <parse> (:0)\n    at parse (unknown)\n    at <anonymous> (/$bunfs/root/claude:62:1142)\n    at A (/$bunfs/root/claude:11:7851)\n    at pU_ (/$bunfs/root/claude:1283:6773)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:05:59.620Z"},{"error":"Error: 1P event logging: 2 events failed to export (code=FailedToOpenSocket, Was there a typo in the url or port?)\n    at queueFailedEvents (/$bunfs/root/claude:2105:2350)\n    at async doExport (/$bunfs/root/claude:2105:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:06:04.624Z"},{"error":"Error: {\"message\":\"Failed to export 2 events (code=FailedToOpenSocket, Was there a typo in the url or port?)\",\"originalLine\":\"2105\",\"originalColumn\":\"1409\",\"line\":\"2105\",\"column\":\"1409\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Failed to export 2 events (code=FailedToOpenSocket, Was there a typo in the url or port?)\\n    at doExport (/$bunfs/root/claude:2105:1409)\\n    at processTicksAndRejections (native:7:39)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:2148:25028)\n    at <anonymous> (/$bunfs/root/claude:2100:20181)\n    at pm7 (/$bunfs/root/claude:2100:20725)\n    at <anonymous> (/$bunfs/root/claude:2101:17366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:06:04.624Z"},{"error":"Error\n    at <anonymous> (/$bunfs/root/claude:29:11081)\n    at <anonymous> (/$bunfs/root/claude:43:10259)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/claude:42:3470)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:45:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:06:07.969Z"},{"error":"Error: 1P event logging: 1 events failed to export (code=FailedToOpenSocket, Was there a typo in the url or port?)\n    at queueFailedEvents (/$bunfs/root/claude:2105:2350)\n    at async doExport (/$bunfs/root/claude:2105:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:07:01.709Z"},{"error":"Error: {\"message\":\"Failed to export 1 events (code=FailedToOpenSocket, Was there a typo in the url or port?)\",\"originalLine\":\"2105\",\"originalColumn\":\"1409\",\"line\":\"2105\",\"column\":\"1409\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Failed to export 1 events (code=FailedToOpenSocket, Was there a typo in the url or port?)\\n    at doExport (/$bunfs/root/claude:2105:1409)\\n    at processTicksAndRejections (native:7:39)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:2148:25028)\n    at <anonymous> (/$bunfs/root/claude:2100:20181)\n    at pm7 (/$bunfs/root/claude:2100:20725)\n    at <anonymous> (/$bunfs/root/claude:2101:17366)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-13T05:07:01…

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