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fix: preserve Anthropic cache markers through adapter (#1205)

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Keep assistant cache-control blocks intact when converting OpenAI-format
messages to Anthropic format, and propagate tool-message cache markers onto
generated tool_result blocks.

Adds regression tests covering assistant and tool cache marker preservation
through convert_messages_to_anthropic().
This commit is contained in:
Teknium
2026-03-13 13:27:03 -07:00
committed by GitHub
parent c8bfb1db8f
commit bfb82b5cee
2 changed files with 38 additions and 2 deletions
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12
agent/anthropic_adapter.py
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@@ -404,8 +404,14 @@ def convert_messages_to_anthropic(
if role == "assistant":
blocks = []
if content:
text = content if isinstance(content, str) else json.dumps(content)
blocks.append({"type": "text", "text": text})
if isinstance(content, list):
for part in content:
if isinstance(part, dict):
blocks.append(dict(part))
elif part is not None:
blocks.append({"type": "text", "text": str(part)})
else:
blocks.append({"type": "text", "text": str(content)})
for tc in m.get("tool_calls", []):
fn = tc.get("function", {})
args = fn.get("arguments", "{}")
@@ -436,6 +442,8 @@ def convert_messages_to_anthropic(
"tool_use_id": _sanitize_tool_id(m.get("tool_call_id", "")),
"content": result_content,
}
if isinstance(m.get("cache_control"), dict):
tool_result["cache_control"] = dict(m["cache_control"])
# Merge consecutive tool results into one user message
if (
result