Session file is corrupted - Invalid literal value

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#1,007 opened on Apr 5, 2026 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 38/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Quiet
Tech stack: csharp
Domain: tooling

Research direction

Start at the reported SessionFeature.LoadSession call in SessionFeature.Lifecycle.cs line 215 and trace the SDK's ResumeSessionAsync path. Inspect the corrupted session data around line 355, especially the ephemeral field, and determine a reproducible failure or a clear handling fix for invalid session files.

Written by the indexing model from the issue text.

Description

bug

I'm using the .NET SDK, a few times now, after updating the NuGet version, some (not all) previous sessions become corrupt. This is the error i get when resuming a session -

System.IO.IOException: Communication error with Copilot CLI: Request session.resume failed with message: Session file is corrupted (line 355: ephemeral: Invalid literal value, expected true)
 ---> StreamJsonRpc.RemoteInvocationException: Request session.resume failed with message: Session file is corrupted (line 355: ephemeral: Invalid literal value, expected true)
   at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](RequestId id, String targetName, IReadOnlyList`1 arguments, IReadOnlyList`1 positionalArgumentDeclaredTypes, IReadOnlyDictionary`2 namedArgumentDeclaredTypes, CancellationToken cancellationToken, Boolean isParameterObject)
   at GitHub.Copilot.SDK.CopilotClient.InvokeRpcAsync[T](JsonRpc rpc, String method, Object[] args, StringBuilder stderrBuffer, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at GitHub.Copilot.SDK.CopilotClient.InvokeRpcAsync[T](JsonRpc rpc, String method, Object[] args, StringBuilder stderrBuffer, CancellationToken cancellationToken)
   at GitHub.Copilot.SDK.CopilotClient.InvokeRpcAsync[T](JsonRpc rpc, String method, Object[] args, CancellationToken cancellationToken)
   at GitHub.Copilot.SDK.CopilotClient.ResumeSessionAsync(String sessionId, ResumeSessionConfig config, CancellationToken cancellationToken)
   at App.Features.Sessions.SessionFeature.LoadSession(String sessionId) in D:\a\App\App\src\App\Features\Sessions\SessionFeature.Lifecycle.cs:line 215

Dominant language: Java
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