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Python: add agent-framework-hosting-a2a channel (#6306)

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* feat(python): add agent-framework-hosting-a2a channel

Add a hosting channel that exposes the host target (agent or workflow)
as a peer agent over the Agent-to-Agent (A2A) protocol (JSON-RPC plus a
served agent card). Requests are handled by a host-routed
HostAgentExecutor that drives the host pipeline (ChannelContext.run/
run_stream) instead of wrapping the target directly, so sessions,
linking, and run/response hooks apply. Maps the A2A conversation/context
id to a ChannelSession isolation key and the caller to a ChannelIdentity;
streaming emits incremental task artifacts.

Includes tests, README, and workspace registration.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address A2A hosting channel review feedback

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
Eduard van Valkenburg
2026-06-12 12:20:54 +02:00
committed by GitHub
co-authored by Copilot
parent 36ce0950e4
commit 5534198142
9 changed files with 853 additions and 0 deletions
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python/pyproject.toml
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@@ -90,6 +90,7 @@ agent-framework-hosting-invocations = { workspace = true }
agent-framework-hosting-telegram = { workspace = true }
agent-framework-hosting-activity-protocol = { workspace = true }
agent-framework-hosting-discord = { workspace = true }
agent-framework-hosting-a2a = { workspace = true }
agent-framework-hyperlight = { workspace = true }
agent-framework-lab = { workspace = true }
agent-framework-mem0 = { workspace = true }
@@ -216,6 +217,7 @@ executionEnvironments = [
{ root = "packages/hosting-invocations/tests", reportPrivateUsage = "none" },
{ root = "packages/hosting-telegram/tests", reportPrivateUsage = "none" },
{ root = "packages/hosting-activity-protocol/tests", reportPrivateUsage = "none" },
{ root = "packages/hosting-a2a/tests", reportPrivateUsage = "none" },
{ root = "packages/lab/gaia/tests", reportPrivateUsage = "none" },
{ root = "packages/lab/lightning/tests", reportPrivateUsage = "none" },
{ root = "packages/lab/tau2/tests", reportPrivateUsage = "none" },