Cover Data 0.2.0 under the Python 3.15 Polars wait

config/libraries.toml

@@ -37,7 +37,7 @@ homepage_url = "https://www.ml4trading.io/"
 id = "python-315-polars"
 criterion = "python-3.15-prerelease"
 libraries = ["data", "engineer"]
-affected_versions = ">=0.1.2,<0.2"
+affected_versions = ">=0.1.2,<0.3"
 rationale = "Polars 1.44.2 fails required series construction on CPython 3.15.0rc1."
 evidence = [
     "https://github.com/ml4t/data/issues/37",

decisions/0015-python-315-polars-020-wait.md

@@ -0,0 +1,30 @@
+# Decision 0015: Continue the Polars wait through 0.2 releases
+
+**Status**: Accepted
+**Date**: 2026-09-24
+**Approver**: Stefan Jansen
+
+## Context
+
+Decision 0013 replaced the expiration date for the Data and Engineer Python 3.15 wait with two
+review triggers: Python 3.15 final and a Polars release after 1.44.2. Neither trigger has occurred.
+Data 0.2.0 retains the truthful `Requires-Python: >=3.12,<3.15` bound and passed the blocking Python
+3.12 through 3.14 release matrix, but the configured affected-version range ended before 0.2.0.
+The ecosystem audit therefore rejected the published release even though its dependency blocker,
+supported Python versions, evidence, user impact, and mitigation are unchanged.
+
+## Decision
+
+Extend the `python-315-polars` affected-version range from `>=0.1.2,<0.2` to `>=0.1.2,<0.3`.
+The existing libraries, evidence, mitigation, owning issue, and objective review triggers remain
+unchanged. This covers the Data and Engineer 0.2 release lines while the recorded dependency wait
+is active. It does not claim Python 3.15 support or weaken the three-platform stable matrix.
+
+A 0.3 development or final release is outside this decision. It requires either completed Python
+3.15 qualification or another reviewed decision supported by current dependency evidence.
+
+## Consequences
+
+Data 0.2.0 can satisfy ecosystem qualification when its source commit, release tag, PyPI metadata,
+and deployed documentation agree. Data and Engineer continue to run the visible Python 3.15 canary
+and must requalify when either existing review trigger occurs.

tests/test_config.py

@@ -57,7 +57,10 @@ def test_load_repository_config() -> None:
     assert exception.covers_version("0.1.8.dev2+g9096f8941")
     assert exception.covers_version("0.1.8")
     assert exception.covers_version("0.1.9.dev1")
-    assert not exception.covers_version("0.2.0.dev1")
+    assert exception.covers_version("0.2.0.dev1")
+    assert exception.covers_version("0.2.0")
+    assert exception.covers_version("0.2.1.dev1")
+    assert not exception.covers_version("0.3.0.dev1")
 
     diagnostic_exception = config.exception("python-315-scipy")
     assert diagnostic_exception.libraries == ("diagnostic",)

tests/test_exceptions.py

@@ -15,7 +15,7 @@ def test_validate_exception_accepts_matching_repository() -> None:
         exception_id="python-315-polars",
         library_key="data",
         repository="ml4t/data",
-        package_version="0.1.2",
+        package_version="0.2.0",
         on_date=date(2026, 8, 11),
     )
 
@@ -42,7 +42,7 @@ def test_validate_exception_accepts_matching_repository() -> None:
         (
             "data",
             "ml4t/data",
-            "0.2.0.dev1",
+            "0.3.0.dev1",
             date(2026, 8, 11),
             "does not cover version",
         ),