Task 2 — PPI ID behavioral-core convergence report

Status

PASS. The full green PPI ID test module was archived exactly, and the active module now collects only the 19 behaviors required by the Task 2 brief. Production code and Tasks 3–5 were not edited by this task.

Exact active diff scope

Modified only tests/unit/test_ppi_id_resolution.py.
Retained the 19 explicitly listed test functions and the imports/helpers they require.
Removed all other test functions and support definitions used only by them.
Removed unused image-era members from FakeResponse and FakeHttpClient; these helper-only deletions do not alter a retained test body.
Retained test bodies and assertions are exact source matches to the archived module.
Archive-to-active difflib.unified_diff accounting: added_lines=3 deleted_lines=867 (the three additions are compact replacement signatures/conditions in the pruned helpers; net reduction 864 lines).
No production source was changed.

Line counts

Command:

wc -l tests/unit/test_ppi_id_resolution.py \
  项目记录/代码归档/2026-07-10_PPI_ID修订收敛前快照/test_ppi_id_resolution.full.py.txt

Result:

  581 tests/unit/test_ppi_id_resolution.py
 1445 项目记录/代码归档/2026-07-10_PPI_ID修订收敛前快照/test_ppi_id_resolution.full.py.txt

Reduction: 864 lines (59.8%).

Test evidence

Pre-rewrite four-file checkpoint:

/home/xia-lab/miniconda3/envs/test4py311/bin/python -m pytest \
  tests/unit/test_id_resolution.py \
  tests/unit/test_ppi_id_resolution.py \
  tests/unit/test_ppi_string_policy.py \
  tests/unit/test_pipeline_backend_execution_env.py -q

Result: 177 passed in 7.01s (exit 0).

Required focused checkpoint after rewrite:

/home/xia-lab/miniconda3/envs/test4py311/bin/python -m pytest \
  tests/unit/test_ppi_id_resolution.py \
  tests/unit/test_id_resolution.py \
  tests/unit/test_ppi_string_policy.py -q

Result: 44 passed in 0.45s (exit 0): 19 active PPI ID tests, 12 ID-resolution tests, and 13 STRING-policy tests.

Required Task 1 four-file checkpoint after rewrite:

/home/xia-lab/miniconda3/envs/test4py311/bin/python -m pytest \
  tests/unit/test_id_resolution.py \
  tests/unit/test_ppi_id_resolution.py \
  tests/unit/test_ppi_string_policy.py \
  tests/unit/test_pipeline_backend_execution_env.py -q

Result: 76 passed in 6.76s (exit 0). The collection fell from 177 to 76 solely because the active PPI ID module fell from 120 collected cases to the required 19, a reduction of 101 archived cases.

Syntax verification:

/home/xia-lab/miniconda3/envs/test4py311/bin/python -m py_compile \
  tests/unit/test_ppi_id_resolution.py

Result: exit 0.

Self-review

Parsed both active and archived modules and confirmed exactly 19 active test_* definitions.
Compared every retained test definition with its archived source segment; every retained test body and assertion matched exactly.
Reviewed helper usage and removed the unused image-response headers/content, image streaming/status helpers, optional response-URL mode, and unused GET path.
Confirmed the archive checksum after the rewrite remained 35d4b3c6da7329ea04d07f03473ea5be10698e1b686a09bb7811d7e8d4b729f5.
Confirmed no assertion was weakened or rewritten; non-test edits are limited to pruning the retained fake HTTP helpers.
Both required offline pytest checkpoints passed.

Concerns

Both pytest runs emit the pre-existing RequestsDependencyWarning: installed urllib3 2.6.3 or chardet 7.1.0/charset_normalizer 3.4.7 does not match the supported requests dependency range. It did not affect collection or outcomes.
No live STRING request was made; all verification remained offline as required.

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