v1.0.0-beta.3

Feature: mode handler APIs for plan approval and rate-limit recovery

Applications can now register callbacks for exitPlanMode.request and autoModeSwitch.request from the Copilot runtime, giving full control over plan-mode transitions and automatic model switching after rate-limit events. (#1228)

const session = await client.createSession({
  onExitPlanMode: async (request) => ({ approved: true }),
  onAutoModeSwitch: (request) => "yes",
});

var session = await client.CreateSessionAsync(new SessionConfig
{
    OnExitPlanMode = (request, _) => Task.FromResult(new ExitPlanModeResult { Approved = true }),
    OnAutoModeSwitch = (request, _) => Task.FromResult(AutoModeSwitchResponse.Yes),
});

• Python: on_exit_plan_mode / on_auto_mode_switch kwargs on create_session()
• Go: ExitPlanModeHandler / AutoModeSwitchHandler fields on SessionConfig

Feature: SDK tracing diagnostics

The .NET, Python, and Rust SDKs now emit structured diagnostic logs covering CLI startup, TCP connection, JSON-RPC request timing, session lifecycle, and error paths. (#1217)

var client = new CopilotClient(new CopilotClientOptions
{
    Logger = loggerFactory.CreateLogger<CopilotClient>(),
});

Python emits logs via stdlib logging under copilot.* loggers at DEBUG level. Rust uses tracing structured fields; wire up a tracing_subscriber as usual.

Feature: enableSessionTelemetry session option

A new enableSessionTelemetry option on SessionConfig and ResumeSessionConfig lets applications explicitly enable or disable the runtime's internal session telemetry. (#1224)

const session = await client.createSession({ enableSessionTelemetry: true });

var session = await client.CreateSessionAsync(new SessionConfig { EnableSessionTelemetry = true });

Other changes

• bugfix: [C#] session-event enums are now string-backed readonly structs, preventing deserialization failures when the runtime adds new enum values (#1226)
• bugfix: [Rust] binary tool result resource blobs now default to application/octet-stream when mimeType is absent (#1222)

New contributors

• @sunbrye made their first contribution in #1208
• @cschleiden made their first contribution in #1222
• @IeuanWalker made their first contribution in #1232

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