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refactor(agent): defer transcript assembly to runner (#5608)

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* refactor(agent): defer transcript assembly to runner

Keep persisted history and the fresh turn as explicit inputs until the Runner assembles the provider transcript. Preserve ContextBuilder and direct AgentRunner compatibility while making the save boundary structural.

Refs NAN-81.

* fix(providers): preserve mixed adjacent user content
This commit is contained in:
chengyongru
2026-08-31 00:06:15 +08:00
committed by GitHub
parent d019658501
commit 6cd7063682
19 changed files with 355 additions and 113 deletions
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tests/providers/test_enforce_role_alternation.py
+40 -5
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@@ -112,14 +112,49 @@ class TestEnforceRoleAlternation:
assert result[1]["content"] is None
assert result[2]["role"] == "tool"
def test_non_string_content_uses_latest(self):
def test_consecutive_user_messages_preserve_text_before_multimodal_content(self):
image = {
"type": "image_url",
"image_url": {"url": "data:image/png;base64,aW1hZ2U="},
}
msgs = [
{"role": "user", "content": [{"type": "text", "text": "A"}]},
{"role": "user", "content": "B"},
{"role": "user", "content": "Earlier unanswered question"},
{
"role": "user",
"content": [image, {"type": "text", "text": "The error is here"}],
},
]
result = LLMProvider._enforce_role_alternation(msgs)
assert len(result) == 1
assert result[0]["content"] == "B"
assert result == [{
"role": "user",
"content": [
{"type": "text", "text": "Earlier unanswered question"},
image,
{"type": "text", "text": "The error is here"},
],
}]
def test_consecutive_user_messages_preserve_multimodal_content_before_text(self):
image = {
"type": "image_url",
"image_url": {"url": "data:image/png;base64,aW1hZ2U="},
}
msgs = [
{
"role": "user",
"content": [image, {"type": "text", "text": "First question"}],
},
{"role": "user", "content": "Follow-up detail"},
]
result = LLMProvider._enforce_role_alternation(msgs)
assert result == [{
"role": "user",
"content": [
image,
{"type": "text", "text": "First question"},
{"type": "text", "text": "Follow-up detail"},
],
}]
def test_original_messages_not_mutated(self):
msgs = [