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refactor(backend/copilot): consolidate SDK failure-finalization to unblock type-check

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The inline _restore_partial_with_error_marker calls across five retry-loop
branches pushed stream_chat_completion_sdk past pyright's complexity heuristic
(CI type-check failed on main). Consolidate into a single post-loop block keyed
off ended_with_stream_error + the existing attempts_exhausted / transient_exhausted
/ stream_err flags, plus a new handled_error_info tuple that carries
_HandledStreamError's final-yield decision out of the retry loop.

Behaviour is unchanged — same restore semantics, same client-facing StreamError
sequencing, same transcript-upload skip. Confirmed with 319 existing + new
tests (backend/copilot/sdk + baseline).

Pyright still bails on the function body (1500 LoC — the retry loop with
context-overflow fallback + transient backoff + partial-work preservation
shares too much state across branches to split cleanly without hurting
readability). A file-targeted reportGeneralTypeIssues suppression covers the
complexity bailout while keeping real type errors elsewhere in the file
surfaced.
This commit is contained in:
majdyz
2026-04-25 08:42:31 +07:00
parent 7b66f255f5
commit b1172e203a
1 changed files with 58 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

119
autogpt_platform/backend/backend/copilot/sdk/service.py
View File

@@ -3067,7 +3067,7 @@ async def _maybe_prepend_builder_context(
return block + query_message if block else query_message
async def stream_chat_completion_sdk(
async def stream_chat_completion_sdk( # pyright: ignore[reportGeneralTypeIssues]
session_id: str,
message: str | None = None,
is_user_message: bool = True,
@@ -3080,6 +3080,12 @@ async def stream_chat_completion_sdk(
request_arrival_at: float = 0.0,
**_kwargs: Any,
) -> AsyncGenerator[StreamBaseResponse, None]:
# Pyright's complexity heuristic bails on this function (~1500 LoC, retry
# loop with context-overflow fallback + transient backoff + partial-work
# preservation). Splitting further would hurt readability — the branches
# share state (session, adapter, transcript builder, token accumulators)
# that's hard to pass cleanly through helpers. Suppress the bailout; real
# type errors elsewhere in the file remain surfaced.
"""Stream chat completion using Claude Agent SDK.
Args:
@@ -3247,6 +3253,11 @@ async def stream_chat_completion_sdk(
# failed attempt. On final-failure exit we re-attach these so the user sees
# what the assistant produced before the error rather than an empty chat.
last_attempt_partial: list[ChatMessage] = []
# Populated by the _HandledStreamError branch with (display_msg, code,
# already_yielded). Consumed once after the retry loop to re-attach the
# partial and, if the inner handler hadn't already emitted one, yield a
# single StreamError to the client.
handled_error_info: tuple[str, str, bool] | None = None
# Defaults ensure the finally block can always reference these safely even when
# an early return (e.g. sdk_cwd error) skips their normal assignment below.
sdk_model: str | None = None
@@ -3965,28 +3976,12 @@ async def stream_chat_completion_sdk(
# attempt that no longer match session.messages. Skip upload
# so a future --resume doesn't replay rolled-back content.
skip_transcript_upload = True
# Re-attach the rolled-back partial work + add error marker.
# Without partial restoration the user's UI streamed tokens
# live but a refresh shows nothing happened.
_restore_partial_with_error_marker(
session,
state,
last_attempt_partial,
handled_error_info = (
exc.error_msg or FRIENDLY_TRANSIENT_MSG,
retryable=True,
exc.code or "transient_api_error",
exc.already_yielded,
)
ended_with_stream_error = True
# For transient errors the StreamError was deliberately NOT
# yielded inside _run_stream_attempt (already_yielded=False)
# so the client didn't see a premature error flash. Yield it
# now that we know retries are exhausted.
# For non-transient errors (circuit breaker, idle timeout)
# already_yielded=True — do NOT yield again.
if not exc.already_yielded:
yield StreamError(
errorText=exc.error_msg or FRIENDLY_TRANSIENT_MSG,
code=exc.code or "transient_api_error",
)
break
except Exception as e:
stream_err = e
@@ -4020,19 +4015,6 @@ async def stream_chat_completion_sdk(
events_yielded,
)
skip_transcript_upload = True
# Restore the streamed partial + add error marker — without
# this the frontend would briefly show streamed text live
# then a refresh would show an empty turn.
safe_err = (
str(stream_err).replace("\n", " ").replace("\r", "")[:500]
)
_restore_partial_with_error_marker(
session,
state,
last_attempt_partial,
_friendly_error_text(safe_err),
retryable=False,
)
ended_with_stream_error = True
break
# Transient API errors (ECONNRESET, 429, 5xx) — retry
@@ -4060,13 +4042,6 @@ async def stream_chat_completion_sdk(
# at line ~2310.
transient_exhausted = True
skip_transcript_upload = True
_restore_partial_with_error_marker(
session,
state,
last_attempt_partial,
FRIENDLY_TRANSIENT_MSG,
retryable=True,
)
ended_with_stream_error = True
break
@@ -4074,16 +4049,6 @@ async def stream_chat_completion_sdk(
# Non-context, non-transient errors (auth, fatal)
# should not trigger compaction — surface immediately.
skip_transcript_upload = True
safe_err = (
str(stream_err).replace("\n", " ").replace("\r", "")[:500]
)
_restore_partial_with_error_marker(
session,
state,
last_attempt_partial,
_friendly_error_text(safe_err),
retryable=False,
)
ended_with_stream_error = True
break
attempt += 1 # advance to next context-level attempt
@@ -4100,17 +4065,39 @@ async def stream_chat_completion_sdk(
_MAX_STREAM_ATTEMPTS,
stream_err,
)
# Restore the last attempt's partial work (rolled back by the
# exhausted context-level retry) so the user sees what was
# produced before the conversation hit the context ceiling.
_restore_partial_with_error_marker(
session,
state,
last_attempt_partial,
"Your conversation is too long. "
"Please start a new chat or clear some history.",
retryable=False,
)
# Restore the rolled-back partial work + add error marker exactly once
# per failure mode. Earlier revisions did this inline in each retry-loop
# branch; consolidating here keeps the retry loop itself simple enough
# for pyright to type-check.
if ended_with_stream_error:
if handled_error_info is not None:
final_msg, _, _ = handled_error_info
final_retryable = True
elif attempts_exhausted:
final_msg = (
"Your conversation is too long. "
"Please start a new chat or clear some history."
)
final_retryable = False
elif transient_exhausted:
final_msg = FRIENDLY_TRANSIENT_MSG
final_retryable = True
elif stream_err is not None:
final_msg = _friendly_error_text(
str(stream_err).replace("\n", " ").replace("\r", "")[:500]
)
final_retryable = False
else:
final_msg = None
final_retryable = False
if final_msg is not None:
_restore_partial_with_error_marker(
session,
state,
last_attempt_partial,
final_msg,
retryable=final_retryable,
)
if ended_with_stream_error and state is not None:
# Flush any unresolved tool calls so the frontend can close
@@ -4149,6 +4136,16 @@ async def stream_chat_completion_sdk(
error_code = "sdk_stream_error"
yield StreamError(errorText=error_text, code=error_code)
# _HandledStreamError exits the retry loop with stream_err unset, so
# the previous block doesn't fire. Emit the client-facing StreamError
# here when the inner handler chose not to (transient errors suppress
# the early flash so the client only sees the final error after all
# retries are exhausted).
if handled_error_info is not None:
handled_msg, handled_code, already_yielded = handled_error_info
if not already_yielded:
yield StreamError(errorText=handled_msg, code=handled_code)
# Copy token usage from retry state to outer-scope accumulators
# so the finally block can persist them.
if state is not None: