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.NET: Adds Valkey to chat message history - issue 5445 (#5542)

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* Adds Valkey to chat message history

* Address review: switch to Valkey.Glide, add options class, remove context provider

- Switch from StackExchange.Redis to Valkey.Glide 1.1.0 (official Valkey .NET client)
- Extract optional params into ValkeyChatHistoryProviderOptions
- Add JsonSerializerOptions support, remove [RequiresUnreferencedCode]
- Make MaxMessages/MaxMessagesToRetrieve readonly via options
- Remove ValkeyContextProvider (overlaps with ChatHistoryMemoryProvider + MEVD)
- Remove ValkeyProviderScope (only used by context provider)
- Remove connection string constructors (caller manages IConnectionMultiplexer)
- Update samples to use new API and gpt-5.4-mini

* Use type-safe JsonSerializer overloads, remove suppress attributes

Use JsonSerializerOptions.GetTypeInfo() for Serialize/Deserialize calls
to enable NativeAOT/trimming compatibility without suppress attributes.
Default to AgentAbstractionsJsonUtilities.DefaultOptions when no options provided.

Signed-off-by: Matthias Howell <matthias.howell@improving.com>

* Update READMEs: remove context provider references

Remove ValkeyContextProvider and long-term memory references from sample
READMEs since the context provider was removed from this PR. Simplify
Valkey server requirements (no search module needed for chat history).

Signed-off-by: Matthias Howell <matthias.howell@improving.com>

* Apply suggestion from @westey-m

* Fix formatting (dotnet format)

Signed-off-by: Matthias Howell <matthias.howell@improving.com>

* Update dotnet/src/Microsoft.Agents.AI.Valkey/Microsoft.Agents.AI.Valkey.csproj

Co-authored-by: Roger Barreto <19890735+rogerbarreto@users.noreply.github.com>

---------

Signed-off-by: Matthias Howell <matthias.howell@improving.com>
Co-authored-by: Matthias Howell <matthias.howell@yoppworks.com>
Co-authored-by: westey <164392973+westey-m@users.noreply.github.com>
Co-authored-by: Roger Barreto <19890735+rogerbarreto@users.noreply.github.com>
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Matthias Howell
2026-06-11 09:18:00 -04:00
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@@ -214,6 +214,7 @@ WARP.md
**/memory-bank/
**/projectBrief.md
**/tmpclaude*
.kiro/
# Dependency-bound validation reports
python/scripts/dependency-*-results.json
python/scripts/dependencies/dependency-*-results.json