diff --git a/docs/glossary.md b/docs/glossary.md
index 14eceff966..872068b7cc 100644
--- a/docs/glossary.md
+++ b/docs/glossary.md
@@ -373,6 +373,10 @@ A lightweight, extensible test platform for .NET that serves as a modern alterna
 
 A NuGet package (`Microsoft.Testing.Platform.AI`) that provides AI extensibility abstractions for Microsoft.Testing.Platform. It defines the [IChatClientProvider](#ichatclientprovider) interface and leverages [Microsoft.Extensions.AI](https://www.nuget.org/packages/Microsoft.Extensions.AI) types so that test frameworks and extensions can consume Large Language Model (LLM) capabilities — flaky test analysis, crash dump analysis, test failure root-cause analysis, and more — without implementing provider-specific logic. This package ships the **abstractions only**; an AI provider implementation such as [Microsoft.Testing.Extensions.AzureFoundry](#azurefoundry) must also be registered to supply actual AI capabilities. See `docs/microsoft.testing.platform/001-AI-Extensibility.md` for the design RFC.
 
+### Microsoft.Testing.Platform.ServerMode.Client.Sources
+
+A source-only NuGet package that provides a client implementation for launching and communicating with an MTP test host running in [Server Mode](#server-mode). Its C# sources are compiled as internal types directly into the consuming project, avoiding a runtime dependency or separate assembly while keeping the client wire-compatible with the MTP server protocol. Added in [PR #10085](https://github.com/microsoft/testfx/pull/10085).
+
 ### Microsoft.Testing.Extensions.Logging
 
 An experimental MTP extension (`Microsoft.Testing.Extensions.Logging`, `[TPEXP]`) that bridges Microsoft Testing Platform diagnostic logs to any `Microsoft.Extensions.Logging` provider (e.g., Console, Serilog, Application Insights, OpenTelemetry exporters). Register via `AddMicrosoftExtensionsLogging()` on `ITestApplicationBuilder`, passing either an existing `ILoggerFactory` or a configuration delegate for the logging builder. The minimum log level is bounded by the platform's effective diagnostic level; per-category filters in the `ILoggingBuilder` can narrow but not widen it. MTP core (`Microsoft.Testing.Platform`) does not depend on `Microsoft.Extensions.Logging`; this package provides an additive opt-in bridge only. Currently **experimental** — API surface may change without notice. See `docs/RFCs/013-Microsoft-Extensions-Bridges.md` for the design.
@@ -455,6 +459,10 @@ Request for Comments document in the `docs/RFCs/` folder. RFCs describe design d
 
 A public enum in `Microsoft.VisualStudio.TestTools.UnitTesting` that controls whether elements must appear in the same position when comparing sequences with `Assert.AreSequenceEqual` and `Assert.AreNotSequenceEqual`. Values: `InOrder` (0, default) — elements must appear in the same order in both sequences (LINQ `SequenceEqual` semantics); `InAnyOrder` (1) — elements may appear in any order, but each element must appear the same number of times in both sequences (multiset equality). Introduced in [PR #8334](https://github.com/microsoft/testfx/pull/8334).
 
+### Server Mode
+
+An MTP execution mode in which the test host process runs as a server and communicates with a client (such as an IDE, CLI, or CI tool) over the [JSON-RPC Protocol](#json-rpc-protocol). The client can initialize the server, request test discovery or execution, receive test updates, and stop the server when finished.
+
 ## T
 
 ### TestArchitectures