fix(tox): Make -latest alias point to highest stable release, not prerelease

If the highest tested version is a prerelease (rc, alpha, beta), the
-latest alias now points to the highest stable version instead.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sentrivana

scripts/populate_tox/populate_tox.py

@@ -760,18 +760,30 @@ def write_tox_file(packages: dict) -> None:
     for group, integrations in packages.items():
         context["groups"][group] = []
         for integration in integrations:
+            # Find the highest stable (non-prerelease) release for the
+            # -latest alias.  Prereleases are always appended last by
+            # pick_releases_to_test, so we walk backwards.
+            latest_stable = None
+            for rel in reversed(integration["releases"]):
+                if not rel.is_prerelease:
+                    latest_stable = rel
+                    break
+
             context["groups"][group].append(
                 {
                     "name": integration["name"],
                     "package": integration["package"],
                     "extra": integration["extra"],
                     "releases": integration["releases"],
+                    "latest_stable": latest_stable,
                     "dependencies": _render_dependencies(
                         integration["name"], integration["releases"]
                     ),
                     "latest_dependencies": _render_latest_dependencies(
-                        integration["name"], integration["releases"][-1]
-                    ),
+                        integration["name"], latest_stable
+                    )
+                    if latest_stable
+                    else [],
                 }
             )
             context["testpaths"].append(

scripts/populate_tox/tox.jinja

@@ -61,7 +61,9 @@ envlist =
     {% for release in integration.releases %}
     {{ release.rendered_python_versions }}-{{ integration.name }}-v{{ release }}
     {% endfor %}
-    {{ integration.releases[-1].rendered_python_versions }}-{{ integration.name }}-latest
+    {% if integration.latest_stable %}
+    {{ integration.latest_stable.rendered_python_versions }}-{{ integration.name }}-latest
+    {% endif %}
 
     {% endfor %}
 
@@ -144,10 +146,12 @@ deps =
     {{ integration.name }}-v{{ release }}: {{ integration.package }}=={{ release }}
     {% endif %}
     {% endfor %}
+    {% if integration.latest_stable %}
     {% if integration.extra %}
-    {{ integration.name }}-latest: {{ integration.package }}[{{ integration.extra }}]=={{ integration.releases[-1] }}
+    {{ integration.name }}-latest: {{ integration.package }}[{{ integration.extra }}]=={{ integration.latest_stable }}
     {% else %}
-    {{ integration.name }}-latest: {{ integration.package }}=={{ integration.releases[-1] }}
+    {{ integration.name }}-latest: {{ integration.package }}=={{ integration.latest_stable }}
+    {% endif %}
     {% endif %}
     {% for dep in integration.dependencies %}
     {{ dep }}

tox.ini

@@ -184,7 +184,7 @@ envlist =
     {py3.6,py3.11,py3.12}-sqlalchemy-v1.4.54
     {py3.7,py3.12,py3.13}-sqlalchemy-v2.0.48
     {py3.10,py3.13,py3.14,py3.14t}-sqlalchemy-v2.1.0b1
-    {py3.10,py3.13,py3.14,py3.14t}-sqlalchemy-latest
+    {py3.7,py3.12,py3.13}-sqlalchemy-latest
 
 
     # ~~~ Flags ~~~
@@ -213,7 +213,7 @@ envlist =
     {py3.6,py3.9,py3.10}-gql-v3.4.1
     {py3.9,py3.12,py3.13}-gql-v4.0.0
     {py3.9,py3.13,py3.14,py3.14t}-gql-v4.3.0b0
-    {py3.9,py3.13,py3.14,py3.14t}-gql-latest
+    {py3.9,py3.12,py3.13}-gql-latest
 
     {py3.6,py3.9,py3.10}-graphene-v3.3
     {py3.8,py3.12,py3.13}-graphene-v3.4.3
@@ -615,7 +615,7 @@ deps =
     sqlalchemy-v1.4.54: sqlalchemy==1.4.54
     sqlalchemy-v2.0.48: sqlalchemy==2.0.48
     sqlalchemy-v2.1.0b1: sqlalchemy==2.1.0b1
-    sqlalchemy-latest: sqlalchemy==2.1.0b1
+    sqlalchemy-latest: sqlalchemy==2.0.48
 
 
     # ~~~ Flags ~~~
@@ -648,7 +648,7 @@ deps =
     gql-v3.4.1: gql[all]==3.4.1
     gql-v4.0.0: gql[all]==4.0.0
     gql-v4.3.0b0: gql[all]==4.3.0b0
-    gql-latest: gql[all]==4.3.0b0
+    gql-latest: gql[all]==4.0.0
 
     graphene-v3.3: graphene==3.3
     graphene-v3.4.3: graphene==3.4.3
@@ -672,7 +672,7 @@ deps =
     grpc-v1.62.3: grpcio==1.62.3
     grpc-v1.78.0: grpcio==1.78.0
     grpc-v1.80.0rc1: grpcio==1.80.0rc1
-    grpc-latest: grpcio==1.80.0rc1
+    grpc-latest: grpcio==1.78.0
     grpc: protobuf
     grpc: mypy-protobuf
     grpc: types-protobuf
@@ -707,7 +707,7 @@ deps =
     beam-v2.14.0: apache-beam==2.14.0
     beam-v2.71.0: apache-beam==2.71.0
     beam-v2.72.0rc2: apache-beam==2.72.0rc2
-    beam-latest: apache-beam==2.72.0rc2
+    beam-latest: apache-beam==2.71.0
     beam: dill
 
     celery-v4.4.7: celery==4.4.7
@@ -794,7 +794,7 @@ deps =
     starlette-v0.40.0: starlette==0.40.0
     starlette-v0.52.1: starlette==0.52.1
     starlette-v1.0.0rc1: starlette==1.0.0rc1
-    starlette-latest: starlette==1.0.0rc1
+    starlette-latest: starlette==0.52.1
     starlette: pytest-asyncio
     starlette: python-multipart
     starlette: requests