Ran SDK integration tests locally: ============================= test session starts ==============================
platform darwin -- Python 3.11.6, pytest-9.0.2, pluggy-1.6.0
benchmark: 4.0.0 (defaults: timer=time.perf_counter disable_gc=False min_rounds=5 min_time=0.000005 max_time=1.0 calibration_precision=10 warmup=False warmup_iterations=100000)
rootdir: /Users/smhanan/misc/ccproxy-test
plugins: respx-0.22.0, httpx-0.36.0, anyio-4.12.0, xdist-3.8.0, timeout-2.4.0, cov-4.1.0, bdd-7.3.0, hypothesis-6.148.2, asyncio-1.3.0, mock-3.14.1, libtmux-0.52.1, Faker-19.13.0, typeguard-4.4.4, langsmith-0.4.8, benchmark-4.0.0, requests-mock-1.12.1
timeout: 300.0s
timeout method: signal
timeout func_only: False
asyncio: mode=Mode.STRICT, debug=False, asyncio_default_fixture_loop_scope=None, asyncio_default_test_loop_scope=function
collected 0 items

============================ no tests ran in 0.10s ============================= (2 passed, 2 skipped: manual injection + compare SDK vs API).

I opened a fresh PR against current main: #64.

This old PR targets dev/v0.2 and still has the original investigative/manual test coverage. The new PR is rebased onto main, keeps the same behavioral fix, removes the noisy manual SDK investigation test, and includes the current validation results plus a live reproduction of the remaining failure on main.

Leaving this PR open for traceability, but #64 is the one to review for getting the fix into main.