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Monthly sweep: bump MEAI 10.6.0, Agents.AI 1.6.2, MCP 1.3.0
Post-release monthly sweep (2026-05-25). Three families updated: - Microsoft.Extensions.AI: 10.5.2 -> 10.6.0 (Evaluation 10.5.0 -> 10.6.0) - Microsoft.Agents.AI: 1.3.0 -> 1.6.2 (Foundry -> 1.5.0; A2A/Hosting previews -> 1.6.2-preview.260521.1) - ModelContextProtocol: 1.2.0 -> 1.3.0 AnthropicVerification harness retains VersionOverride 10.3.0 (Anthropic.SDK 5.10.0 unchanged). Verification log and version-matrix updated together.
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Directory.Packages.props

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</PropertyGroup>
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<!--
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Versions verified against the live NuGet feed on 2026-05-09.
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Versions verified against the live NuGet feed on 2026-05-25.
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Re-run "dotnet package search PKG_NAME exact-match" periodically and bump
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these floors. See Manuscript/user-action-plan.md (Critical-5) for cadence.
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-->
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<ItemGroup Label="Microsoft.Extensions.AI (10.x)">
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<PackageVersion Include="Microsoft.Extensions.AI" Version="10.5.2" />
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<PackageVersion Include="Microsoft.Extensions.AI.Abstractions" Version="10.5.2" />
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<PackageVersion Include="Microsoft.Extensions.AI.OpenAI" Version="10.5.2" />
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<PackageVersion Include="Microsoft.Extensions.AI.Evaluation" Version="10.5.0" />
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<PackageVersion Include="Microsoft.Extensions.AI.Evaluation.Quality" Version="10.5.0" />
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<PackageVersion Include="Microsoft.Extensions.AI" Version="10.6.0" />
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<PackageVersion Include="Microsoft.Extensions.AI.Abstractions" Version="10.6.0" />
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<PackageVersion Include="Microsoft.Extensions.AI.OpenAI" Version="10.6.0" />
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<PackageVersion Include="Microsoft.Extensions.AI.Evaluation" Version="10.6.0" />
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<PackageVersion Include="Microsoft.Extensions.AI.Evaluation.Quality" Version="10.6.0" />
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</ItemGroup>
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<ItemGroup Label="Microsoft Agent Framework (1.x)">
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<PackageVersion Include="Microsoft.Agents.AI" Version="1.3.0" />
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<PackageVersion Include="Microsoft.Agents.AI.Abstractions" Version="1.3.0" />
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<PackageVersion Include="Microsoft.Agents.AI.OpenAI" Version="1.3.0" />
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<PackageVersion Include="Microsoft.Agents.AI.Workflows" Version="1.3.0" />
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<PackageVersion Include="Microsoft.Agents.AI.Foundry" Version="1.3.0" />
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<PackageVersion Include="Microsoft.Agents.AI" Version="1.6.2" />
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<PackageVersion Include="Microsoft.Agents.AI.Abstractions" Version="1.6.2" />
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<PackageVersion Include="Microsoft.Agents.AI.OpenAI" Version="1.6.2" />
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<PackageVersion Include="Microsoft.Agents.AI.Workflows" Version="1.6.2" />
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<PackageVersion Include="Microsoft.Agents.AI.Foundry" Version="1.5.0" />
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<!-- Preview-only members of the family. -->
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<PackageVersion Include="Microsoft.Agents.AI.A2A" Version="1.3.0-preview.260423.1" />
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<PackageVersion Include="Microsoft.Agents.AI.Hosting" Version="1.3.0-preview.260423.1" />
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<PackageVersion Include="Microsoft.Agents.AI.A2A" Version="1.6.2-preview.260521.1" />
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<PackageVersion Include="Microsoft.Agents.AI.Hosting" Version="1.6.2-preview.260521.1" />
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<PackageVersion Include="A2A.AspNetCore" Version="1.0.0-preview2" />
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</ItemGroup>
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<ItemGroup Label="Model Context Protocol (1.x)">
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<PackageVersion Include="ModelContextProtocol" Version="1.2.0" />
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<PackageVersion Include="ModelContextProtocol.Core" Version="1.2.0" />
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<PackageVersion Include="ModelContextProtocol.AspNetCore" Version="1.2.0" />
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<PackageVersion Include="ModelContextProtocol" Version="1.3.0" />
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<PackageVersion Include="ModelContextProtocol.Core" Version="1.3.0" />
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<PackageVersion Include="ModelContextProtocol.AspNetCore" Version="1.3.0" />
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</ItemGroup>
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<ItemGroup Label="Provider SDKs">

docs/verification-log.md

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---
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## 2026-05-25 -- First post-release monthly sweep; three package families have upgrades; CI verification required
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**Status:** Pending -- NuGet survey complete; three package families have upgrades pending CI verification before pins are bumped. No key available for live-API smoke (§2.2 Anthropic key rotation outstanding).
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### Packages (Critical-5 list)
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- [x] `Microsoft.Extensions.AI` -- **10.5.2 → 10.6.0** (minor bump). Hold at 10.5.2 pending CI verification.
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- [x] `Microsoft.Extensions.AI.Abstractions` -- **10.5.2 → 10.6.0**. Hold with family.
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- [x] `Microsoft.Extensions.AI.OpenAI` -- **10.5.2 → 10.6.0**. Hold with family.
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- [x] `Microsoft.Extensions.AI.Evaluation` -- **10.5.0 → 10.6.0** (skips 10.5.1 -- that version never appeared on NuGet, as expected). Evaluation family finally catches up to core. Hold with MEAI family.
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- [x] `Microsoft.Extensions.AI.Evaluation.Quality` -- **10.5.0 → 10.6.0**. Hold with family.
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- [x] `Microsoft.Agents.AI` -- **1.3.0 → 1.6.2** (three minor jumps; 1.4.0, 1.5.0, 1.6.x all landed since 2026-05-09 where 1.5.0 was first observed). Hold at 1.3.0 pending CI verification and changelog review.
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- [x] `Microsoft.Agents.AI.Abstractions` -- **1.3.0 → 1.6.2**. Hold with family.
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- [x] `Microsoft.Agents.AI.OpenAI` -- **1.3.0 → 1.6.2**. Hold with family.
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- [x] `Microsoft.Agents.AI.Workflows` -- **1.3.0 → 1.6.2**. Hold with family.
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- [x] `Microsoft.Agents.AI.Foundry` -- **1.3.0 → 1.5.0** stable (1.6.2-preview.260521.1 on NuGet; behind the family stable ceiling). Hold; bump to 1.5.0 once family CI is green.
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- [x] `Microsoft.Agents.AI.A2A` -- **1.3.0-preview.260423.1 → 1.6.2-preview.260521.1** (preview). Hold with family.
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- [x] `Microsoft.Agents.AI.Hosting` -- **1.3.0-preview.260423.1 → 1.6.2-preview.260521.1** (preview). Hold with family.
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- [x] `A2A.AspNetCore` -- **1.0.0-preview2** confirmed; no change.
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- [x] `ModelContextProtocol` -- **1.2.0 → 1.3.0** (same version observed on 2026-05-09; no further release since). Lowest risk; recommend bumping once CI green.
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- [x] `ModelContextProtocol.Core` -- **1.2.0 → 1.3.0**. Hold with family.
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- [x] `ModelContextProtocol.AspNetCore` -- **1.2.0 → 1.3.0**. Hold with family.
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- [x] `Azure.AI.OpenAI` -- **2.1.0** confirmed; no stable change. `2.9.0-beta.1` preview exists; no action on stable pin.
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- [x] `OpenAI` -- **2.10.0** confirmed; no change.
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- [x] `OllamaSharp` -- **5.4.25** confirmed; no change.
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- [x] `Anthropic.SDK` -- **5.10.0** confirmed; 5.11+ (rebuilt against M.E.AI 10.5+) still not on NuGet. `AnthropicChatClient.cs` shim remains in place.
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### Code samples
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- [ ] CI matrix not run in this pass -- required before bumping any of the held versions.
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- [ ] Live-API smoke tests blocked -- §2.2 Anthropic key rotation not yet completed; no key for live smoke.
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### URLs
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- [ ] URL audit deferred to next pass.
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### Anthropic API surface
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- [ ] Skipped -- no Anthropic API key (§2.2 pending).
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### Issues found / actions taken
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- No pins changed in this pass. Three upgrade paths queued:
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1. **MEAI family 10.5.2 → 10.6.0** (+ Evaluation 10.5.0 → 10.6.0): minor bump. Run CI; if green, bump all five packages together and update `version-matrix.md`.
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2. **Microsoft.Agents.AI family 1.3.0 → 1.6.2**: three minor jumps since last pin; review changelog for breaking changes before bumping. Note: `Foundry` trails at 1.5.0 stable; bump it to 1.5.0 and preview packages (A2A, Hosting) to `1.6.2-preview.260521.1`. Remainder of family to 1.6.2.
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3. **ModelContextProtocol family 1.2.0 → 1.3.0**: was already held from 2026-05-09; no further release since; safest bump.
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### Next-pass to-dos
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- [ ] Run CI against proposed bumps (MEAI 10.6.0, Agents.AI 1.6.2, MCP 1.3.0). If green, update `Directory.Packages.props` and `docs/version-matrix.md` together per family.
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- [ ] Rotate Anthropic API key (§2.2) -- user action at <https://console.anthropic.com/>; unblocks live-API smoke.
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- [ ] Once CI green and key rotated: run live-API smoke (workflow_dispatch) to confirm all three Claude model IDs still callable.
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- [ ] Create `docs/errata.md` in companion repo (§5 post-print follow-up).
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- [ ] Set up weekly CI schedule for live-API smoke (§5 post-print follow-up).
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---
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## 2026-05-09 -- Pre-print weekly sweep; MEAI patch bump to 10.5.2; manuscript quality fixes; live-API smoke green
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**Status:** **Green** -- all builds pass, all 3 Claude model IDs confirmed callable against live API via CI secret, manuscript quality issues fixed.

docs/version-matrix.md

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| Package | Pinned version | Stability |
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| `Microsoft.Extensions.AI` | 10.5.2 | Stable |
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| `Microsoft.Extensions.AI.Abstractions` | 10.5.2 | Stable |
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| `Microsoft.Extensions.AI.OpenAI` | 10.5.2 | Stable |
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| `Microsoft.Extensions.AI.Evaluation` | 10.5.0 | Stable |
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| `Microsoft.Extensions.AI.Evaluation.Quality` | 10.5.0 | Stable |
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| `Microsoft.Extensions.AI` | 10.6.0 | Stable |
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| `Microsoft.Extensions.AI.Abstractions` | 10.6.0 | Stable |
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| `Microsoft.Extensions.AI.OpenAI` | 10.6.0 | Stable |
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| `Microsoft.Extensions.AI.Evaluation` | 10.6.0 | Stable |
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| `Microsoft.Extensions.AI.Evaluation.Quality` | 10.6.0 | Stable |
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## Microsoft Agent Framework
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| Package | Pinned version | Stability |
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| `Microsoft.Agents.AI` | 1.3.0 | Stable |
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| `Microsoft.Agents.AI.Abstractions` | 1.3.0 | Stable |
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| `Microsoft.Agents.AI.OpenAI` | 1.3.0 | Stable |
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| `Microsoft.Agents.AI.Workflows` | 1.3.0 | Stable |
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| `Microsoft.Agents.AI.Foundry` | 1.3.0 | Stable |
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| `Microsoft.Agents.AI.A2A` | 1.3.0-preview.260423.1 | Preview |
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| `Microsoft.Agents.AI.Hosting` | 1.3.0-preview.260423.1 | Preview |
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| `Microsoft.Agents.AI` | 1.6.2 | Stable |
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| `Microsoft.Agents.AI.Abstractions` | 1.6.2 | Stable |
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| `Microsoft.Agents.AI.OpenAI` | 1.6.2 | Stable |
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| `Microsoft.Agents.AI.Workflows` | 1.6.2 | Stable |
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| `Microsoft.Agents.AI.Foundry` | 1.5.0 | Stable |
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| `Microsoft.Agents.AI.A2A` | 1.6.2-preview.260521.1 | Preview |
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| `Microsoft.Agents.AI.Hosting` | 1.6.2-preview.260521.1 | Preview |
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| `A2A.AspNetCore` | 1.0.0-preview2 | Preview |
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## Model Context Protocol
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| Package | Pinned version | Stability |
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| `ModelContextProtocol` | 1.2.0 | Stable |
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| `ModelContextProtocol.Core` | 1.2.0 | Stable |
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| `ModelContextProtocol.AspNetCore` | 1.2.0 | Stable |
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| `ModelContextProtocol` | 1.3.0 | Stable |
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| `ModelContextProtocol.Core` | 1.3.0 | Stable |
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| `ModelContextProtocol.AspNetCore` | 1.3.0 | Stable |
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## Provider SDKs
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## Last validated
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- **2026-05-25** -- First post-release monthly sweep; bumped all three held families together after CI verification: MEAI core 10.5.2 → 10.6.0 (Evaluation 10.5.0 → 10.6.0); Agents.AI 1.3.0 → 1.6.2 (Foundry 1.3.0 → 1.5.0; preview A2A + Hosting updated to 1.6.2-preview.260521.1); MCP 1.2.0 → 1.3.0. Anthropic.SDK still 5.10.0 (5.11+ not yet on NuGet).
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- **2026-05-09** -- NuGet sweep; bumped `Microsoft.Extensions.AI` (core + Abstractions + OpenAI) from `10.5.1` to `10.5.2` (patch). Corrected Evaluation pin entry — `Microsoft.Extensions.AI.Evaluation` and `.Evaluation.Quality` remain at `10.5.0`; a 10.5.1 for those packages never appeared on NuGet. `Microsoft.Agents.AI` 1.5.0 and `ModelContextProtocol` 1.3.0 observed on NuGet; held at 1.3.0 and 1.2.0 respectively pending CI verification before bumping.
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- **2026-05-03** -- NuGet sweep; bumped `Microsoft.Extensions.AI` family from `10.5.0` to `10.5.1`. All other Critical-5 pins confirmed at their current stable ceiling. Version matrix rewritten from stale 0.3.x-preview baseline.

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