18 tagged releases and 9 launches in one week: Pydantic AI ships five times while MCP spreads change across five components

Asked:

“Generate a detailed report of feature release and distribution by all the agentic frameworks and protocols lat week”

“Last week” is the completed Monday–Sunday window of Aug 24–30, 2026. A broad live-web scan verified 27 releases, rollouts and launches across 12 agentic ecosystems — frameworks (Pydantic AI, Google ADK, Microsoft Agent Framework, LangChain, Agno, Mastra), the MCP protocol stack, and new harnesses — each carried here with its delivery route and source.

Release calendar, Aug 24–30, grouped by ecosystem

Package / GitHub tagged release Hosted public beta / GA rollout Protocol SDK / tooling (MCP) Open-source launch / announcement

Hover a marker for what shipped. Jakarta Agentic AI 1.0.0-M1 has no verifiable tag date and sits in the undated row rather than a guessed day.

What the calendar cannot say

Pydantic AI’s five-release run bookends the week’s themes: a LangChain migration skill opened it on Monday and clai --mcp-config with tool-call streaming closed it on Friday, with capability-field deprecations and Bedrock guardrail trace propagation in between — github.com
MCP shipped no new core specification; instead five components moved — Python SDK 2.1.0 (behavior and security changes), PHP SDK v0.8.0 (full 2026-07-28 spec support), Inspector 2.4.0, github-mcp-server 1.11.0 per-tool OAuth scopes, and Anthropic’s enterprise-managed connector authorization GA — mcp-news.com
Interoperability was the week’s through-line: Google ADK v2.8.0 made A2A task mode native, Microsoft Channels lets one agent speak many platforms and protocols including MCP and A2A, and OpenAI’s open-sourced Codex harness replaces its MCP server with a bidirectional JSON-RPC app server — techstrong.ai
Production controls and guardrails recur across vendors: Model Armor in ADK, Bedrock guardrail traces in Pydantic AI, LangSmith LLM Gateway’s runtime controls in public beta, and A2A allowlisting plus artifact scoping backported to ADK v1.39.1 — github.com

Ecosystem feature matrix

5 releases · Aug 24–28

Pydantic AI

Fastest cadence in the index: LangChain migration skill (v2.34.0), capability-field deprecations (v2.35.0), Bedrock guardrail trace propagation (v2.35.1), Heroku GLM routing via zai_model_profile (v2.35.3), clai --mcp-config and tool-call streaming (v2.36.0). github.com

2 branches · Aug 25 & 27

Google ADK for Python

v2.8.0: native A2A task mode for RemoteA2aAgent, ADK_MAX_LLM_CALLS control, create/delete data-agent tools, Model Armor guardrail plugin, Nvidia NIM sample. v1.39.1 backports A2A allowlisting, artifact storage/scoping and security validations. github.com

1.16.0 + Channels · Aug 26–27

Microsoft Agent Framework

Python 1.16.0 tagged on Aug 27; separately, Channels (Aug 26) is a set of open-source Python packages connecting one agent or workflow to many platforms and protocols at once, complementing MCP and A2A support. github.com

5 components · Aug 24–26

MCP ecosystem

Python SDK 2.1.0, PHP SDK v0.8.0 (full 2026-07-28 spec: stateless lifecycle, header validation, multi round-trip requests, extensions, deprecations), Inspector 2.4.0, github-mcp-server 1.11.0, enterprise-managed connector auth GA. mcp-news.com

3 items · Aug 27

LangChain

Managed Deep Agents and LangSmith LLM Gateway public betas (AWS BYOC, runtime controls for production agents) plus Deep Agents v0.7 with Tuned Evaluators. aitoolly.com

Aug 24–27

OpenAI Codex & new harnesses

Codex harness open-sourced under Apache-2.0 with a bidirectional JSON-RPC app server, deprecating codex mcp-server; Headlong’s always-on Bash agent loop; Agent Lightning v1.0.1 agent-optimizer skill; CodeCrew 1.0; AgentConnect; Jakarta Agentic AI 1.0.0-M1. groundtruth.day

Distribution and delivery routes

Dominant route · 14 of 27 items

GitHub tagged releases and package ecosystems

Pydantic AI ×5, ADK ×2, agent-framework 1.16.0, Agno 3.0.0/3.0.2, the Mastra package wave (@mastra/core 1.62–1.63, deployer, dsql, factory), Deep Agents v0.7, CodeCrew 1.0.0 — install by tag or package manager.

Hosted rollouts · 3 items

Public betas and an enterprise GA

LangChain’s Managed Deep Agents and LangSmith LLM Gateway entered public beta (with AWS BYOC); Anthropic’s enterprise-managed MCP connector authorization reached general availability — features arrive server-side, nothing to install.

Protocol SDKs and tooling · 4 items

MCP component distribution

Python SDK 2.1.0 and PHP SDK v0.8.0 via language package ecosystems; Inspector 2.4.0 and github-mcp-server 1.11.0 as tooling releases. The spec itself did not move; its 2026-07-28 revision propagated through SDKs.

Source launches and signed builds · 6 items

Open-sourced runtimes and desktop delivery

Codex harness open-sourced under Apache-2.0; Headlong as a dependency-light Bash microharness; Channels as open-source Python packages; Agent Lightning installed through gh skill; AgentConnect as open source; Puppyone v0.3.13 as a signed, notarized desktop build.

Compatibility, security and migration watch-outs

Breaking migration

Agno 3.0.0 requires a DB migration before serving traffic

Stable after four alphas; run the database migration first. 3.0.2 then changes metadata precedence to component → session → call-site on Agent, Team and Workflow. mindpattern.ai

Silent behavior change

MCP Python SDK 2.1.0 alters existing servers

Handler exception text no longer reaches the model, and the 4 MiB body cap now also covers SSE and OAuth — audit error-handling paths before upgrading. mindpattern.ai

Deprecations

Pydantic AI capability fields; MCP Roots/Sampling/Logging; codex mcp-server

v2.35.0 deprecates capability_loaded and available_capability_ids; the PHP SDK carries the spec’s SEP-2577 deprecations of Roots, Sampling and Logging; Codex deprecates codex mcp-server in favor of the app server. github.com

Security caveat

Headlong’s shared thought stream; ADK’s hardening backport

Headlong’s always-on loop carries a reported shared-thought-stream access-control caveat. Google ADK v1.39.1 backports A2A allowlisting, app-scoped artifact storage and security validation fixes to the v1 branch. byteiota.com

Release ledger

DateEcosystemReleaseTypeWhat shippedSource
Aug 24AgnoAgno 3.0.0Package/tagStable after four alphas; requires a DB migration before serving traffic; tool-result offloading and persistent IPython CodeMode.mindpattern.ai
Aug 24IndependentsHeadlong launchSource launchAlways-on Bash-based persistent-agent loop; needs only Bash 3.2+, git, curl, jq and an LLM API key; reported shared-thought-stream access-control caveat.byteiota.com
Aug 24MCP ecosystemMCP Python SDK 2.1.0Protocol SDK/toolingStops leaking handler exception text to the model; extends the 4 MiB body cap to SSE and OAuth — behavior changes for existing servers.mindpattern.ai
Aug 24MCP ecosystemClaude MCP connectors enterprise auth GAHosted rolloutAnthropic makes enterprise-managed authorization for MCP connectors generally available.cybersecuritynews.com
Aug 24MicrosoftAgent Lightning v1.0.1Source launchFirst official cut of the Agent Lightning Skill: optimizes other agents across prompts, tools, workflows, models; installs via gh skill.mindpattern.ai
Aug 24OpenAICodex harness Apache-2.0Source launchOpen-sourced execution runtime: threads, tool calls, streaming, sandboxing, approvals; bidirectional JSON-RPC app server; deprecates codex mcp-server.groundtruth.day
Aug 24Pydantic AIpydantic-ai v2.34.0Package/tagAdds a LangChain migration skill.github.com
Aug 25Google ADKadk-python v2.8.0Package/tagNative A2A task mode for RemoteA2aAgent, ADK_MAX_LLM_CALLS, data-agent tools, Model Armor guardrail plugin, Nvidia NIM sample, telemetry updates.github.com
Aug 25MCP ecosystemMCP PHP SDK v0.8.0Protocol SDK/toolingImplements the 2026-07-28 spec: stateless lifecycle, request-header validation, multi round-trip requests, extensions framework, and deprecations of Roots, Sampling and Logging.mcp-news.com
Aug 25MCP ecosystemgithub-mcp-server 1.11.0Protocol SDK/toolingRequests OAuth scopes per tool call instead of up front.mcp-news.com
Aug 25Pydantic AIpydantic-ai v2.35.0Package/tagDeprecates capability_loaded / available_capability_ids in favor of capability_active / active_capability_ids.github.com
Aug 26IndependentsAgentConnect releaseSource launchOpen-source multi-agent release.marketminute.com
Aug 26MCP ecosystemMCP Inspector 2.4.0Protocol SDK/toolingApp-rendered elicitation forms, keychain-free SecretStore with cross-process lock, per-server opt-out OAuth refresh_token grant, unportable-schema flags.mcp-news.com
Aug 26Mastramastra packages core 1.62–1.63 +Package/tagPackage wave on Aug 26: @mastra/core 1.62.0 and 1.63.0, deployer 1.63.0, dsql 1.3.3, factory 0.10.1.github.com
Aug 26MicrosoftAgent Framework Channels open sourceSource launchOpen-source Python packages letting one agent or workflow connect to multiple communication platforms and protocols at once, alongside MCP and A2A support.techstrong.ai
Aug 26Pydantic AIpydantic-ai v2.35.1Package/tagCarries Bedrock guardrail trace in ModelResponse.provider_details.github.com
Aug 27Google ADKadk-python v1.39.1Package/tagPorts A2A event action allowlist, app-scoped artifact storage, artifact reference scoping and security validations to v1.github.com
Aug 27IndependentsCodeCrew v1.0.0Package/tag1.0 shipped as a GitHub release; gated crew workflow.radiusred.uk
Aug 27LangChainManaged Deep Agents public betaHosted rolloutManaged Deep Agents enter public beta with AWS BYOC support.aitoolly.com
Aug 27LangChainLangSmith LLM Gateway public betaHosted rolloutRuntime controls for production AI agents in public beta.aitoolly.com
Aug 27LangChainDeep Agents v0.7Package/tagDeep Agents v0.7 with Tuned Evaluators.aitoolly.com
Aug 27Microsoftagent-framework 1.16.0Package/tagAgent Framework Python 1.16.0 tagged release.github.com
Aug 27Pydantic AIpydantic-ai v2.35.3Package/tagRoutes Heroku GLM models through zai_model_profile.github.com
Aug 28Pydantic AIpydantic-ai v2.36.0Package/tagAdds --mcp-config support and tool-call streaming to clai.github.com
Aug 30AgnoAgno v3.0.2Package/tagMetadata precedence resolves component, then session, then call-site on Agent, Team and Workflow.olud.ai
Aug 30IndependentsPuppyone v0.3.13Package/tagSigned and notarized desktop release, promoted from an internal build.olud.ai
IndependentsJakarta Agentic AI 1.0.0-M1Package/tagFirst milestone of the Jakarta Agentic AI spec; exact tag date not stated in evidence.foojay.io

Method: broad live-web scan for agentic framework and protocol releases in the completed week Mon Aug 24 – Sun Aug 30, 2026; 27 verified items merged from ~128 evidence rows across five extraction sets. Official GitHub release pages and vendor blogs are treated as primary sources; news and industry summaries as secondary. A release date is used only when the source text states it — Jakarta Agentic AI 1.0.0-M1 is left undated. “Type” distinguishes a package/tag release from a hosted rollout, protocol SDK/tooling, or a source launch. Adjacent items outside the agentic-framework scope (editors, model runtimes, vendor platform launches such as AgentZ) were cut for space; the scan cannot claim capture of private or unindexed projects.

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