richText messages only kept rich_text_list items whose type was
"text", so bold/italic/inlineCode/pre segments were silently dropped;
a message made entirely of formatted segments produced empty content
and fell through to the "unsupported message type: richText" warning.
Now any item carrying text is kept (matching the SDK's own
get_text_list, which keys off the "text" field) and its type is mapped
to Markdown so the formatting survives into the agent's context.
Text and downloadCode within a rich-text item are handled
independently (the SDK treats them as separate via get_text_list /
get_image_list), so an item carrying both a caption and an attachment
no longer drops the file.
The shared httpx.AsyncClient was created without a timeout, so all
requests (including large file/image downloads) used httpx's 5s
default and hit ConnectTimeout/ReadTimeout on uploads. Set an explicit
httpx.Timeout (connect=10s, read/write=30s).
Adds regression tests for formatted-segment preservation, the
all-formatted no-drop case, the text+downloadCode item, and the client
timeout configuration.
Closes#4497
Add a new config option group_user_isolation (default: false) to the
DingTalk channel. When enabled, each user in a group chat gets their own
session while bot replies are still routed to the shared group chat.
Audited all channel implementations for overly broad exception handling
that causes retry amplification or silent message loss during network
errors. This is the same class of bug as #3050 (Telegram _send_text).
Fixes by channel:
Telegram (send_delta):
- _stream_end path used except Exception for HTML edit fallback
- Network errors (TimedOut, NetworkError) triggered redundant plain
text edit, doubling connection demand during pool exhaustion
- Changed to except BadRequest, matching the _send_text fix
Discord:
- send() caught all exceptions without re-raising
- ChannelManager._send_with_retry() saw successful return, never retried
- Messages silently dropped on any send failure
- Added raise after error logging
DingTalk:
- _send_batch_message() returned False on all exceptions including
network errors — no retry, fallback text sent unnecessarily
- _read_media_bytes() and _upload_media() swallowed transport errors,
causing _send_media_ref() to cascade through doomed fallback attempts
- Added except httpx.TransportError handlers that re-raise immediately
WeChat:
- Media send failure triggered text fallback even for network errors
- During network issues: 3×(media + text) = 6 API calls per message
- Added specific catches: TimeoutException/TransportError re-raise,
5xx HTTPStatusError re-raises, 4xx falls back to text
QQ:
- _send_media() returned False on all exceptions
- Network errors triggered fallback text instead of retry
- Added except (aiohttp.ClientError, OSError) that re-raises
Tests: 331 passed (283 existing + 48 new across 5 channel test files)
Fixes: #3054
Related: #3050, #3053
Max HsuandXubin Ren
李明振andXubin Ren
hinotoi-agentandXubin Ren
bahtyaandXubin Ren
Rohit_Dayanand123andXubin Ren
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