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Python: feat(core): load the agent-hooks middleware from a host declaration #9405

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Python: feat(core): load the agent-hooks middleware from a host declaration #9405

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abf491b
Python: feat(core): load the agent-hooks middleware from a host decla…
MohammadHaroonAbuomar Oct 9, 2026
38f3e4e
Python: fix(core): validate caller registries against the middleware …
MohammadHaroonAbuomar Oct 15, 2026
082a8ff
Python: refactor(core): one declaration factory, per-call registry
MohammadHaroonAbuomar Oct 16, 2026
37a4e39
Merge remote-tracking branch 'upstream/main' into agent-hooks-declara…
MohammadHaroonAbuomar Oct 16, 2026
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10 changes: 6 additions & 4 deletions python/PACKAGE_STATUS.md
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Original file line number Diff line number Diff line change
Expand Up @@ -82,12 +82,14 @@ listed below.

#### `AGENT_HOOKS`

- `agent-framework-core`: `create_agent_hooks_middleware` and
`create_agent_hooks_middleware_from_emitter` from `agent_framework/_agent_hooks.py`,
- `agent-framework-core`: `create_agent_hooks_middleware`,
`create_agent_hooks_middleware_from_emitter` and the host-declaration factory
`create_agent_hooks_middleware_from_declaration` from `agent_framework/_agent_hooks.py`,
the AGENT-HOOKS-0.1 enforcement middleware bundle, and the `MiddlewareBundle`
container from `agent_framework/_middleware.py` that both factories produce
container from `agent_framework/_middleware.py` that the factories produce
(`MiddlewareBundle` itself needs no optional dependency). Requires installing the
`agent-hooks-sdk` package separately. Known limitation: service-side (hosted) tool
`agent-hooks-sdk` package separately (0.1.0b2 or later for the host-declaration
factory). Known limitation: service-side (hosted) tool
execution never passes through the framework's function-invocation seam, so the
`pre_tool_call`/`post_tool_call` points cannot intercept it; hosted tool calls and
outputs are surfaced in the `post_model_call` content projection instead.
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7 changes: 6 additions & 1 deletion python/packages/core/agent_framework/__init__.py
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Expand Up @@ -42,7 +42,11 @@
)

_LAZY_MODULE_EXPORTS: Final[Mapping[str, tuple[str, ...]]] = {
"._agent_hooks": ("create_agent_hooks_middleware", "create_agent_hooks_middleware_from_emitter"),
"._agent_hooks": (
"create_agent_hooks_middleware",
"create_agent_hooks_middleware_from_declaration",
"create_agent_hooks_middleware_from_emitter",
),
"._agents": ("Agent", "BaseAgent", "RawAgent", "SupportsAgentRun"),
"._clients": (
"BaseChatClient",
Expand Down Expand Up @@ -682,6 +686,7 @@
"background_tasks_running_message",
"chat_middleware",
"create_agent_hooks_middleware",
"create_agent_hooks_middleware_from_declaration",
"create_agent_hooks_middleware_from_emitter",
"create_always_approve_tool_response",
"create_always_approve_tool_with_arguments_response",
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7 changes: 6 additions & 1 deletion python/packages/core/agent_framework/__init__.pyi
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Expand Up @@ -4,7 +4,11 @@ from typing import Final

__version__: Final[str]

from ._agent_hooks import create_agent_hooks_middleware, create_agent_hooks_middleware_from_emitter
from ._agent_hooks import (
create_agent_hooks_middleware,
create_agent_hooks_middleware_from_declaration,
create_agent_hooks_middleware_from_emitter,
)
from ._agents import Agent, BaseAgent, RawAgent, SupportsAgentRun
from ._clients import (
BaseChatClient,
Expand Down Expand Up @@ -637,6 +641,7 @@ __all__ = [
"background_tasks_running_message",
"chat_middleware",
"create_agent_hooks_middleware",
"create_agent_hooks_middleware_from_declaration",
"create_agent_hooks_middleware_from_emitter",
"create_always_approve_tool_response",
"create_always_approve_tool_with_arguments_response",
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292 changes: 273 additions & 19 deletions python/packages/core/agent_framework/_agent_hooks.py
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