Add cloud session config support

[tiagonbotelho]

The runtime is adding a cloud option to session.create so SDK consumers can request cloud-backed remote sessions with repository metadata. This exposes that create-only option consistently across all SDK clients.

Summary

• Add public cloud session option/repository types for Node, Python, Go, .NET, and Rust.
• Forward cloud only on session creation payloads, leaving resume behavior unchanged.
• Add focused serialization/forwarding coverage and document cloud session usage across clients.

Notes

Generated RPC/schema files were not updated because the current runtime schema does not expose the high-level session.create request used by these SDK clients.

[Copilot]

Pull request overview

This PR adds a create-only cloud session configuration option across all SDKs, allowing callers to request cloud-backed remote sessions and (optionally) attach GitHub repository metadata. The change forwards cloud only on session.create requests (not session.resume), adds serialization/forwarding tests, and documents usage.

Changes:

• Add cloud session config/repository option types to Node, Python, Go, .NET, and Rust, and forward them on session.create.
• Add targeted tests validating JSON serialization/forwarding behavior for the new cloud option.
• Document “cloud sessions” usage across SDKs and note that it’s create-only; add an Unreleased changelog entry.

Show a summary per file

File	Description
rust/tests/session_test.rs	Extends SessionConfig serialization test to cover cloud.repository fields and omission when unset.
rust/src/types.rs	Adds Rust CloudSessionOptions/CloudSessionRepository types and SessionConfig.cloud with builder.
python/test_client.py	Adds a test ensuring cloud is forwarded in session.create payloads.
python/copilot/client.py	Introduces Python CloudSessionOptions/CloudSessionRepository and forwards cloud in create_session.
python/copilot/init.py	Exposes new cloud session types from the Python package.
nodejs/test/client.test.ts	Adds a test asserting cloud is included in the session.create request.
nodejs/src/types.ts	Defines TS CloudSessionOptions/CloudSessionRepository and adds cloud to SessionConfig.
nodejs/src/index.ts	Re-exports the new TS cloud session types.
nodejs/src/client.ts	Forwards cloud in the session.create JSON-RPC payload.
go/types.go	Adds Go CloudSessionOptions/CloudSessionRepository and exposes SessionConfig.Cloud.
go/client.go	Wires SessionConfig.Cloud into the session.create request payload.
go/client_test.go	Adds JSON serialization tests for cloud presence/omission in create-session requests.
dotnet/test/Unit/SerializationTests.cs	Adds a unit test validating create-session request JSON contains cloud.repository fields.
dotnet/test/Unit/CloneTests.cs	Extends clone coverage to include SessionConfig.Cloud.
dotnet/src/Types.cs	Adds .NET CloudSessionOptions/CloudSessionRepository and SessionConfig.Cloud cloning support.
dotnet/src/Client.cs	Adds Cloud to the internal CreateSessionRequest record sent over JSON-RPC.
docs/features/remote-sessions.md	Documents “Cloud sessions” usage across SDKs and clarifies create-only behavior.
CHANGELOG.md	Adds an Unreleased entry describing the new cloud create-session option with examples.

Copilot's findings

• Files reviewed: 18/18 changed files
• Comments generated: 1

[SteveSandersonMS]

Looks great, thanks @tiagonbotelho!

Only change request is to not include the changelog content, since we'll generate that later. We don't have an "unreleased" section inside the changelog file as it would constantly conflict as we're working, plus we want our changelog generator to be able to summarize across all the work that's happened in a given release.

[tiagonbotelho]

Accept. Thanks for the consistency review; this confirms the cross-SDK API and create-only behavior are aligned, so no code changes were needed for this comment.

[tiagonbotelho]

Accept as a positive consistency check. I also removed the changelog examples in response to maintainer feedback, so the feature docs now carry the usage examples while release notes remain generated.

[github-actions]

Cross-SDK Consistency Review ✅

This PR adds the cloud session option consistently across all five SDK implementations (Node.js/TypeScript, Python, Go, .NET, and Rust). No consistency gaps were found.

API surface comparison

Element	Node.js	Python	Go	.NET	Rust
Repository type	CloudSessionRepository	CloudSessionRepository	CloudSessionRepository	CloudSessionRepository	CloudSessionRepository
Options type	CloudSessionOptions	CloudSessionOptions	CloudSessionOptions	CloudSessionOptions	CloudSessionOptions
Config field	cloud?: CloudSessionOptions	cloud: CloudSessionOptions | None	Cloud *CloudSessionOptions	Cloud CloudSessionOptions?	cloud: Option<CloudSessionOptions>
Public export	✅ index.ts	✅ __init__.py	✅ (public struct)	✅ (public class)	✅ pub use types::*

Structural consistency

• Field names: owner, name, branch (optional) — all SDKs match.
• JSON serialization: all SDKs emit camelCase keys (owner, name, branch, repository, cloud) and omit cloud / branch when not set.
• Create-only semantics: cloud is forwarded only in session.create payloads; none of the resume request types include it, in alignment with the documented note that cloud options apply only to new sessions.
• Tests: each SDK includes a focused serialization/forwarding test for the new option.

Language-idiom notes (no action needed)

• Go uses Branch string with omitempty rather than *string — idiomatic Go; runtime behavior is equivalent since an empty branch string is meaningfully the same as absent.
• .NET uses Assert.Same (reference equality) for the clone test of Cloud — correct because SessionConfig.Clone() performs a shallow copy of reference-type fields that are themselves immutable value objects.

No inconsistencies found. 🎉

Generated by SDK Consistency Review Agent for issue #1306 · ● 447.9K · ◷