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agent-framework/python/packages/hosting-activity-protocol
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Eduard van Valkenburg e5a6e35843 Python: feat(python): cross-channel hosting improvements (endpoint paths, Activity push, Telegram/Teams fixes) (#6307)
* Update hosting channel endpoint paths

Treat channel paths as concrete endpoint paths so built-in channels can be mounted at their defaults or at the app root without sample-specific subclasses. Update docs, tests, and the Foundry Telegram Invocations sample accordingly.

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

* Add push support to ActivityProtocolChannel

Implement the ChannelPush protocol so the Activity Protocol channel can
receive cross-channel fan-out (ResponseTarget.all_linked) and echo_input
replay as a non-originating destination:

- Add push() that reconstructs a proactive Bot Framework activity (bot/user
  swap) from the stored conversation reference and POSTs it to
  /v3/conversations/{id}/activities.
- Record a ChannelIdentity (service_url, conversation, bot, user, channel_id,
  locale) on ChannelRequest.identity so the host registers the channel under
  its isolation key for fan-out resolution.
- Route the streaming path through deliver_response so Activity-originated
  turns broadcast like Telegram/Discord.
- Add tests for push delivery, service_url validation, ChannelPush instance
  check, and inbound identity recording.

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

* Don't delete Telegram webhook on shutdown by default

The TelegramChannel deleted its webhook on shutdown in webhook mode. During
a rolling redeploy the new revision registers the webhook on startup, then
the old revision's shutdown deletes it, silently breaking inbound delivery
until the next boot. setWebhook is overwriting/idempotent, so startup
re-asserts the webhook every boot and no teardown is needed.

Add a delete_webhook_on_shutdown flag (default False) so teardown is opt-in
for ephemeral deployments, and leave the webhook in place otherwise.

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

* Fix Activity channel streaming on non-Teams channels (405 on updateActivity)

The Activity Protocol channel streamed replies the Teams way: POST a
placeholder, then PUT-edit it as tokens arrive. Only Teams supports the
updateActivity REST op; Web Chat, Direct Line and the Emulator return
405 Method Not Allowed on the PUT, so the user saw only the placeholder.

Gate the placeholder+edit flow on edit-capable channels (msteams). Other
channels now buffer the stream and POST a single final message, mirroring
the non-streaming path's fan-out and response-hook semantics. Also add a
defensive 405 fallback inside the Teams edit loop so an unexpected 405
can never strand the user on the placeholder.

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

* fix(hosting-activity-protocol): don't parse Teams inline attachment content as a URI

Teams message activities include a text/html attachment whose inline
`content` is raw HTML (not a URL). _parse_activity fell back to
`attachment["content"]` and passed it to Content.from_uri, raising
ContentError ("URI must contain a scheme") and failing the whole turn,
so Teams users got no response.

Only treat `contentUrl` as a URI, require an absolute scheme, and skip
unparseable attachments defensively instead of failing the message.

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

* feat(hosting-activity-protocol): native slash-command dispatch for Teams/Activity

Add a commands= parameter to ActivityProtocolChannel that intercepts a
leading /command (after stripping the bot's own @mention) and dispatches
to ChannelCommand handlers, mirroring the Telegram channel. Unknown
commands fall through to the agent. The channel run_hook is applied to
command requests so handlers observe the same resolved isolation key as
ordinary messages, and handler errors are swallowed (200, no Bot Service
retry of non-idempotent commands).

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

* feat(hosting): silent attributed Telegram echoes + Teams markdown rendering

- hosting-telegram: send cross-channel input echoes with disable_notification
  (silent) and detect echo payloads so they aren't re-broadcast.
- hosting-activity-protocol: render outbound + push activities as textFormat
  'markdown' so Teams shows formatted replies (enables per-channel variants).

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

* fix(hosting-activity-protocol): address PR #6307 review feedback

Consult the host delivery pipeline even for empty streamed replies so
ResponseTarget.none is honoured and non-originating fan-out is consulted
instead of always emitting an originating "(no response)" message. Applies
to both the progressive-edit (Teams) and buffered (Web Chat/Direct Line)
streaming paths.

Re-validate service_url against the allow-list in push(): the identity is
read from a persisted store and push runs out-of-band, so the captured
service_url must be re-checked before a bearer token is sent.

Adds tests for empty-stream host consultation/suppression on both streaming
paths and for push rejecting a disallowed service_url.

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

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
e5a6e35843 · 2026-06-03 16:37:03 +02:00
History
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agent-framework-hosting-activity-protocol

Bot Framework Activity Protocol channel for agent-framework-hosting. Connects to Azure Bot Service so the same agent can be reached from Microsoft Teams, Slack, Webex, Telegram-via-bot-channel, and any other channel Azure Bot Service supports — without having to learn each channel's native protocol.

Looking for a deeper Microsoft Teams integration with adaptive cards, message extensions, dialogs, SSO, etc? See the companion agent-framework-hosting-teams package, which is built on microsoft-teams-apps and exposes Teams-specific affordances on top of (still) Azure Bot Service.

Handles inbound message activities, outbound replies, mid-stream updateActivity edits, typing indicators, and both client-secret and certificate credential modes for the outbound Bot Framework token.

Usage

from agent_framework_hosting import AgentFrameworkHost
from agent_framework_hosting_activity_protocol import ActivityProtocolChannel

host = AgentFrameworkHost(
    target=my_agent,
    channels=[
        ActivityProtocolChannel(
            app_id="<entra app id>",
            client_secret="<entra client secret>",
            tenant_id="botframework.com",  # or your tenant id
        )
    ],
)
host.serve()

For tenants that disallow client secrets, supply certificate_path= (and optionally certificate_password=) instead. See the docstring at the top of _channel.py for the openssl one-liner that generates a usable PEM.

In dev mode (no credentials), the channel skips outbound auth so the Bot Framework Emulator can hit the endpoint without setup.