Add changelog for v1.0.7

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

CHANGELOG.md

@@ -5,6 +5,65 @@ All notable changes to the Copilot SDK are documented in this file.
 This changelog is automatically generated by an AI agent when stable releases are published.
 See [GitHub Releases](https://github.com/github/copilot-sdk/releases) for the full list.
 
+## [v1.0.7](https://github.com/github/copilot-sdk/releases/tag/v1.0.7) (2026-07-16)
+
+### Feature: in-process (FFI) transport
+
+The SDK can now host the Copilot runtime in-process by loading the native runtime library via its C ABI (FFI), eliminating the overhead of spawning a child process. This experimental transport is available for Node.js, Rust, Python, and Go. ([#1953](https://github.com/github/copilot-sdk/pull/1953), [#1915](https://github.com/github/copilot-sdk/pull/1915), [#1975](https://github.com/github/copilot-sdk/pull/1975), [#1976](https://github.com/github/copilot-sdk/pull/1976))
+
+```ts
+const client = new CopilotClient({ connection: RuntimeConnection.forInProcess() });
+```
+
+```cs
+var client = new CopilotClient(new CopilotClientOptions { Connection = RuntimeConnection.ForInProcess() });
+```
+
+### Feature: tool search configuration
+
+A new `toolSearch` session option controls how the SDK defers tools when the total tool count exceeds a threshold. When enabled (the default), excess MCP and external tools are surfaced on demand through the built-in `tool_search_tool` rather than pre-loaded into every prompt. Tool results can also include `toolReferences` to link cited sources back to the tool that produced them. ([#1933](https://github.com/github/copilot-sdk/pull/1933))
+
+```ts
+const session = await client.createSession({
+    toolSearch: { defer: "auto" },
+});
+```
+
+```cs
+var session = await client.CreateSessionAsync(new SessionConfig
+{
+    ToolSearch = new ToolSearchConfig { Defer = "auto" },
+});
+```
+
+### Feature: opaque metadata passthrough on tool definitions
+
+Tool definitions now accept an optional `metadata` bag that is forwarded verbatim in `session.create` and `session.resume` RPC calls. This lets hosts attach namespaced, implementation-specific metadata to tools without expanding the typed public contract; unknown keys are preserved and round-tripped untouched. ([#1864](https://github.com/github/copilot-sdk/pull/1864))
+
+```ts
+session.defineTool("my-tool", { metadata: { "myapp:priority": 1 } }, handler);
+```
+
+```cs
+session.DefineTool("my-tool", new ToolOptions { Metadata = new() { ["myapp:priority"] = 1 } }, handler);
+```
+
+### Other changes
+
+- feature: **[All SDKs]** add `canvasProvider` field to session create/resume config so hosts can supply a stable canvas-provider identity that survives cold resume ([#1847](https://github.com/github/copilot-sdk/pull/1847))
+- feature: **[All SDKs]** forward `enableManagedSettings` flag in session create/resume for enterprise managed-settings enforcement ([#1925](https://github.com/github/copilot-sdk/pull/1925))
+- feature: **[All SDKs]** propagate `agentId`, `parentAgentId`, and `interactionType` from LLM inference start frames into request-handler contexts ([#1949](https://github.com/github/copilot-sdk/pull/1949))
+- improvement: **[Rust]** make tool schema and MCP server serialization deterministic by replacing `HashMap` with `IndexMap` ([#1931](https://github.com/github/copilot-sdk/pull/1931))
+- improvement: **[Rust]** use `native-tls` for the build-time CLI download ([#1964](https://github.com/github/copilot-sdk/pull/1964))
+- bugfix: **[.NET]** avoid Windows in-process test teardown deadlock ([#1997](https://github.com/github/copilot-sdk/pull/1997))
+
+### New contributors
+
+- @agoncal made their first contribution in [#1951](https://github.com/github/copilot-sdk/pull/1951)
+- @Shivam60 made their first contribution in [#1964](https://github.com/github/copilot-sdk/pull/1964)
+- @rinceyuan made their first contribution in [#1978](https://github.com/github/copilot-sdk/pull/1978)
+- @belaltaher8 made their first contribution in [#1864](https://github.com/github/copilot-sdk/pull/1864)
+
 ## [java/v1.0.6](https://github.com/github/copilot-sdk/releases/tag/java/v1.0.6) (2026-07-08)
 
 ### Feature: inline lambda tool definitions