The Anthropic-backed Responses-hosting live tests existed in three places at
once. Two of them are better than this one:

- microsoft/agent-framework#7362 folds the same two tests into the existing
  Microsoft.Agents.AI.Hosting.OpenAI.IntegrationTests project, next to the
  OpenAI variant they mirror, using upstream's injected TestSettings and the
  cheap claude-haiku-4-5 default. Approved, CI green.
- ANcpLua/TUnit-1.61.38 carries the TUnit port, which is the live .NET
  testing reference for the workspace.

This copy was the weakest of the three: xUnit v3 on a parked repo, with
TestSettings vendored as a trimmed subset of upstream's shared file, and four
package references carried solely for it. DotNetTests keeps its value as the
six-way framework comparison; it does not need a third copy of these tests.

Suite is 10/10 green after the removal.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

…onical copy

These two live tests (non-streaming Responses render, multi-turn session
continuity over AgentSessionStore, both Anthropic-backed) existed in three
places at once. The upstream one is better than either local copy:

- It sits in Microsoft.Agents.AI.Hosting.OpenAI.IntegrationTests, directly
  beside the OpenAI variant it mirrors, so the provider-agnostic claim about
  the Responses hosting surface is visible as a pair rather than asserted in
  a fork.
- It uses upstream's MSBuild-injected TestSettings instead of a vendored
  trim of it, and defaults to claude-haiku-4-5 rather than claude-opus-5.
- It is a two-file diff against upstream, approved with CI green.

This copy carried the whole Microsoft.Agents.AI + Anthropic + Hosting +
Hosting.OpenAI package set into a test-patterns playground for one folder,
and the vendored TestSettings could only ever drift from the real one.
AdvancedPatterns keeps the five deterministic pattern folders it is actually
for; the live-service exception belongs upstream.

Suite is 10/10 green after the removal.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

…contained copy

Alex restored the two Anthropic-backed live tests (Responses render, session
continuity) alongside the upstream microsoft/agent-framework#7362 copy.
Build clean; suite 12 tests: 10 pass, 2 live tests skip without ANTHROPIC_API_KEY.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>