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This replaces the caller-managed Connector/MCP bridge with the runtime-owned experimental Connector session API across Node.js, Python, Go, .NET, Java, and Rust.
The runtime owns Connector catalog validation, GitHub authorization, bounded connection polling, MCP projection, and authoritative same-session reconciliation.
The SDK host owns opaque account selection, browser/consent UI, destructive-action confirmation, and presentation.
Connector methods accept only an opaque account selection ID. Connector DTOs never accept or return credentials or provider tokens.
Managed-MCP implementation details and Connector credential callbacks are not exposed as public SDK APIs.
Existing mcpServers behavior is unchanged and remains the API for MCP servers configured directly by the application.
Generated clients share one exact, fail-closed schema overlay until the pinned schema contains the Connector contract.
No dependencies, lockfiles, runtime pins, project files, or workflows are changed.
Continue consent/connection polling within caller-supplied and runtime-enforced bounds
Typed connection result
disconnect({ accountId, connectorName })
Disconnect a Connector and remove its session-owned MCP projection
Disconnect result plus authoritative session status
reconcile({ accountId, refreshCatalog? })
Reconcile the authoritative catalog into the current session
Authoritative session status
SDK surface
SDK
Namespace
Node.js
session.rpc.connectors
Python
session.rpc.connectors
Go
session.RPC.Connectors
.NET
session.Rpc.Connectors
Java
session.getRpc().connectors
Rust
session.rpc().connectors()
Each SDK includes wire-shape coverage for all nine methods and typed result/enum serialization. Shared documentation now distinguishes direct mcpServers configuration from runtime-managed Connectors and demonstrates the capability → account selection → list → reconcile → connect → consent → bounded continuation flow.
Validation
Shared and Java code generation are reproducible with no diff and match the compatible runtime Connector schema exactly.
Node.js: formatting, lint, typecheck, and Connector/codegen tests pass.
Python: Ruff checks and Connector tests pass.
Go: Connector and generated RPC packages pass with the race detector.
.NET: all three Connector RPC tests and the all-target build pass.
Java: Spotless, Checkstyle, focused Connector serialization/RPC tests, and the full JDK 25 verification suite pass.
Rust: nightly formatting, Clippy with warnings denied, all-feature tests, doctests, and documentation with warnings denied pass.
Real authenticated E2E passes through both standalone stdio and in-process transports: capability detection, catalog retrieval, reconciliation, three live Connector MCP servers, authoritative connected status, and live tools/list results (22, 1, and 3 tools).
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Copilot review overview
🟡 Changes recommended
The overlay accepts partial schemas, Go leaves handler panics unrecovered, and several public APIs introduce compatibility or experimental-gating breaks.
Get a fresh assessment by requesting another Copilot review.
Keep the pull request focused on Connector session configuration and authorization.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
mattdholloway
changed the title
Add Copilot Connectors support
Expose Copilot Connector session support across SDKs
Sep 16, 2026
mattdholloway
changed the title
Expose Copilot Connector session support across SDKs
Expose experimental Copilot Connector APIs across SDKs
Sep 18, 2026
mattdholloway
changed the title
Expose experimental Copilot Connector APIs across SDKs
Expose Copilot Connector session support
Sep 18, 2026
API generators accept an explicit schema path, but this basename guard applies the overlay only when that path is literally named api.schema.json. For example, passing /tmp/connector-api.json through getApiSchemaPath(cliArg) silently generates clients without the Connector contract. Identify API versus session-event schemas at the call sites instead of inferring the schema kind from the filename.
Regenerate Connector bindings on Copilot CLI 1.0.87-0 and preserve the Java experimental-type and Node extension export updates from main.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Account for the nine generated Connector methods in Node and Java coverage baselines and commit nightly-formatted Rust codegen output.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Remove the temporary Connector schema overlay now that the pinned CLI schema publishes the contract, regenerate all bindings, and preserve the Java experimental-type annotations and Connector host-lifecycle coverage.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Reviewed the authoritative file list (56 changed files across 2 pages) and diff for this PR.
Summary: This PR introduces the experimental Copilot Connectors session RPC API (getCapabilities, getStatus, list, refresh, connect, reconnect, continueConnection, disconnect, reconcile) and adds it consistently across all six SDKs:
SDK
Docs updated
Generated types present
Tests added
Node.js/TS
nodejs/README.md, docs/features/mcp.md
nodejs/src/generated/rpc.ts (+ re-exported in index.ts/types.ts)
added to rust/tests/api_types_test.rs and session_test.rs
Naming/API consistency check: ✅ Access patterns follow each language's idiom and are parallel:
Node/Python: session.rpc.connectors
Go: session.RPC.Connectors
.NET: session.Rpc.Connectors
Java: session.getRpc().connectors
Rust: session.rpc().connectors()
Method names map consistently (e.g. continueConnection/ContinueConnectionAsync/ContinueConnection/continue_connection), and the "call getCapabilities first, account ID is opaque, no credentials/tokens in DTOs" design guidance is documented identically in every README.
Also noted: unrelated but consistent @CopilotExperimental/@apiNote annotations were added to several existing generated Java Fusion/Workflow/ToolResult DTOs (part of a broader "mark experimental types" pass, not connector-specific) — this doesn't affect connector parity and appears intentional generated-code housekeeping.
Conclusion: No cross-SDK inconsistencies found. This is a model example of coordinated feature-parity rollout — no inline comments needed.
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Summary
This replaces the caller-managed Connector/MCP bridge with the runtime-owned experimental Connector session API across Node.js, Python, Go, .NET, Java, and Rust.
mcpServersbehavior is unchanged and remains the API for MCP servers configured directly by the application.Fixes https://github.com/github/copilot-mcp-core/issues/2140
Exposed functions
getCapabilities()getStatus()list({ accountId })refresh({ accountId })connect({ accountId, connectorName })connected,consent_required, orpendingreconnect({ accountId, connectorName })connected,consent_required, orpendingcontinueConnection({ continuationId, maxAttempts, pollIntervalMs, deadlineMs })disconnect({ accountId, connectorName })reconcile({ accountId, refreshCatalog? })SDK surface
session.rpc.connectorssession.rpc.connectorssession.RPC.Connectorssession.Rpc.Connectorssession.getRpc().connectorssession.rpc().connectors()Each SDK includes wire-shape coverage for all nine methods and typed result/enum serialization. Shared documentation now distinguishes direct
mcpServersconfiguration from runtime-managed Connectors and demonstrates the capability → account selection → list → reconcile → connect → consent → bounded continuation flow.Validation
connectedstatus, and livetools/listresults (22, 1, and 3 tools).