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fix: validate content block type in Anthropic assistant blocks (#4060)

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_assistant_blocks appends dict items from content lists directly
without checking for the required 'type' field. A block like
{'text': 'hi'} reaches the Anthropic payload without a 'type',
causing a 400 rejection.

Add the same missing-type check that _convert_user_content already has,
so bare dicts in assistant content lists are coerced to text blocks
instead of triggering API validation errors.

Co-authored-by: nanobot-issues <issues@nanobot.dev>
This commit is contained in:
axelray-dev
2026-06-27 16:47:59 +08:00
committed by Xubin Ren
co-authored by nanobot-issues
parent d8601478db
commit efb792ff24
1 changed files with 10 additions and 1 deletions
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nanobot/providers/anthropic_provider.py
+10 -1
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@@ -275,7 +275,16 @@ class AnthropicProvider(LLMProvider):
blocks.append({"type": "text", "text": content}) blocks.append({"type": "text", "text": content})
elif isinstance(content, list): elif isinstance(content, list):
for item in content: for item in content:
blocks.append(item if isinstance(item, dict) else {"type": "text", "text": str(item)}) if isinstance(item, dict):
if not item.get("type"):
# Anthropic requires every content block to declare a "type".
# A tool that returned a bare dict lands here; coerce it to
# a text block instead of emitting one that the API rejects.
blocks.append({"type": "text", "text": str(item)})
else:
blocks.append(item)
else:
blocks.append({"type": "text", "text": str(item)})
for tc in msg.get("tool_calls") or []: for tc in msg.get("tool_calls") or []:
if not isinstance(tc, dict): if not isinstance(tc, dict):