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Revert "fix(anthropic): remove Claude Code fingerprinting from OAuth Messages API path (#16957)" (#17397)

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This reverts commit 023f5c74b1.
This commit is contained in:
Teknium
2026-04-29 03:55:03 -07:00
committed by GitHub
parent 58a6171bfb
commit 21676e80cc
5 changed files with 90 additions and 108 deletions
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29
tests/agent/test_anthropic_adapter.py
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@@ -68,33 +68,6 @@ class TestBuildAnthropicClient:
assert "fine-grained-tool-streaming-2025-05-14" in betas
assert "api_key" not in kwargs
def test_oauth_does_not_send_claude_code_spoof_headers(self):
"""OAuth requests identify as Hermes — no claude-cli UA, no x-app: cli.
Anthropic's OAuth-gated Messages API accepts requests from non-Claude-Code
clients as long as auth is correct and the OAuth beta headers are present.
See commit that removed fingerprinting for the live-test write-up.
"""
with patch("agent.anthropic_adapter._anthropic_sdk") as mock_sdk:
build_anthropic_client("sk-ant-oat01-" + "x" * 60)
headers = mock_sdk.Anthropic.call_args[1]["default_headers"]
assert "user-agent" not in {k.lower() for k in headers}
assert "x-app" not in {k.lower() for k in headers}
def test_oauth_strips_context_1m_beta(self):
"""context-1m-2025-08-07 is incompatible with OAuth auth — must be stripped.
Anthropic returns HTTP 400 "This authentication style is incompatible
with the long context beta header." when OAuth traffic carries it.
"""
with patch("agent.anthropic_adapter._anthropic_sdk") as mock_sdk:
build_anthropic_client("sk-ant-oat01-" + "x" * 60)
betas = mock_sdk.Anthropic.call_args[1]["default_headers"]["anthropic-beta"]
assert "context-1m-2025-08-07" not in betas
# But other common betas still flow through
assert "interleaved-thinking-2025-05-14" in betas
assert "oauth-2025-04-20" in betas
def test_api_key_uses_api_key(self):
with patch("agent.anthropic_adapter._anthropic_sdk") as mock_sdk:
build_anthropic_client("sk-ant-api03-something")
@@ -113,7 +86,7 @@ class TestBuildAnthropicClient:
kwargs = mock_sdk.Anthropic.call_args[1]
assert kwargs["base_url"] == "https://custom.api.com"
assert kwargs["default_headers"] == {
"anthropic-beta": "interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14"
"anthropic-beta": "interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14,context-1m-2025-08-07"
}
def test_minimax_anthropic_endpoint_uses_bearer_auth_for_regular_api_keys(self):