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fix(research): inherit main model's Bedrock region prefix in sub-agent #185

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fix(research): inherit main model's Bedrock region prefix in sub-agent #185

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7 changes: 6 additions & 1 deletion agent/tools/research_tool.py
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Original file line number Diff line number Diff line change
Expand Up @@ -224,7 +224,12 @@ def _get_research_model(main_model: str) -> str:
if main_model.startswith("anthropic/"):
return "anthropic/claude-sonnet-4-6"
if main_model.startswith("bedrock/") and "anthropic" in main_model:
return "bedrock/us.anthropic.claude-sonnet-4-6"
# Mirror the main model's Bedrock inference-profile prefix so the
# user's explicit profile choice carries through to the sub-agent
# instead of being silently overridden by a hard-coded one.
head = main_model.split("/", 1)[1]
region_prefix = head.split(".", 1)[0]
return f"bedrock/{region_prefix}.anthropic.claude-sonnet-4-6"
# For non-Anthropic models (HF router etc.), use the same model
return main_model

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11 changes: 11 additions & 0 deletions tests/unit/test_cli_rendering.py
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,17 @@ def test_bedrock_anthropic_research_model_stays_on_bedrock():
)


def test_bedrock_research_model_inherits_main_region_prefix():
assert (
_get_research_model("bedrock/global.anthropic.claude-opus-4-7")
== "bedrock/global.anthropic.claude-sonnet-4-6"
)
assert (
_get_research_model("bedrock/apac.anthropic.claude-sonnet-4-20250514-v1:0")
== "bedrock/apac.anthropic.claude-sonnet-4-6"
)


def test_non_anthropic_research_model_is_unchanged():
assert _get_research_model("openai/gpt-5.4") == "openai/gpt-5.4"

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