From b29d9245c79e1e4250bbc7270844d0294e138350 Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 10:37:58 -0800
Subject: [PATCH 01/10] test ci on actions

---
 .github/workflows/test_action.yaml | 15 ++++++++++++++-
 .github/workflows/test_bench.yml   | 10 ++++++----
 run_spec0_update.py                |  2 ++
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/test_action.yaml b/.github/workflows/test_action.yaml
index 20f5075..df1f64f 100644
--- a/.github/workflows/test_action.yaml
+++ b/.github/workflows/test_action.yaml
@@ -1,5 +1,18 @@
 name: Test Action
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - "main"
+      - "*.*"
+    tags:
+      - "v*"
+  pull_request:
+  # Allow manual runs through the web UI
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   generate_data:
diff --git a/.github/workflows/test_bench.yml b/.github/workflows/test_bench.yml
index 824679a..79e2b28 100644
--- a/.github/workflows/test_bench.yml
+++ b/.github/workflows/test_bench.yml
@@ -1,10 +1,13 @@
 name: Run the update test suite
 on:
   push:
-    branches: main
+    branches:
+      - "main"
+      - "*.*"
+    tags:
+      - "v*"
   pull_request:
-    branches: main
-  # On demand
+  # Allow manual runs through the web UI
   workflow_dispatch:
 
 jobs:
@@ -13,7 +16,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v6
-
       - uses: prefix-dev/setup-pixi@v0.9.3
         with:
           pixi-version: "v0.49.0"
diff --git a/run_spec0_update.py b/run_spec0_update.py
index c03981e..00c629a 100644
--- a/run_spec0_update.py
+++ b/run_spec0_update.py
@@ -35,7 +35,9 @@
         )
 
     project_data = read_toml(toml_path)
+    print(project_data)
     schedule_data = read_schedule(schedule_path)
+    print(schedule_data)
     update_pyproject_toml(project_data, schedule_data)
 
     write_toml(toml_path, project_data)

From dcaf6e819826003dbadc03520161a9a8e5dbf76d Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 10:52:28 -0800
Subject: [PATCH 02/10] random tests

---
 run_spec0_update.py                         |  2 -
 spec0_action/__init__.py                    |  1 -
 tests/test_data/pyproject.toml              | 42 +++++++--------------
 tests/test_data/pyproject_pixi.toml         | 30 +++++++++++++++
 tests/test_data/pyproject_pixi_updated.toml | 30 +++++++++++++++
 tests/test_data/pyproject_updated.toml      | 42 +++++++--------------
 tests/test_update_pyproject_toml.py         |  9 +++++
 7 files changed, 97 insertions(+), 59 deletions(-)
 create mode 100644 tests/test_data/pyproject_pixi.toml
 create mode 100644 tests/test_data/pyproject_pixi_updated.toml

diff --git a/run_spec0_update.py b/run_spec0_update.py
index 00c629a..c03981e 100644
--- a/run_spec0_update.py
+++ b/run_spec0_update.py
@@ -35,9 +35,7 @@
         )
 
     project_data = read_toml(toml_path)
-    print(project_data)
     schedule_data = read_schedule(schedule_path)
-    print(schedule_data)
     update_pyproject_toml(project_data, schedule_data)
 
     write_toml(toml_path, project_data)
diff --git a/spec0_action/__init__.py b/spec0_action/__init__.py
index 725c6cc..85307fb 100644
--- a/spec0_action/__init__.py
+++ b/spec0_action/__init__.py
@@ -112,7 +112,6 @@ def update_pyproject_toml(
         pyproject_data["project"]["requires-python"] = repr_spec_set(
             parse_version_spec(new_version["packages"]["python"])
         )
-
     update_pyproject_dependencies(
         pyproject_data["project"]["dependencies"], new_version
     )
diff --git a/tests/test_data/pyproject.toml b/tests/test_data/pyproject.toml
index b06e4c5..f289a6f 100644
--- a/tests/test_data/pyproject.toml
+++ b/tests/test_data/pyproject.toml
@@ -1,30 +1,16 @@
-[project]
-authors         = [{ name = "Scientific Python Developers"}]
-name            = "tests"
-description     = "This is just a dummy package for testing the spec 0 update github action and should not be used"
-requires-python = ">=3.10"
-version         = "0.1.0"
-dependencies    = ["ipython>=8.7.0,<4", "numpy[foo,bar]>=1.10.0,<2"]
-
 [build-system]
-build-backend = "hatchling.build"
-requires      = ["hatchling"]
-
-[tool.pixi.workspace]
-channels  = ["conda-forge"]
-platforms = ["linux-64"]
-
-[tool.pixi.pypi-dependencies]
-tests        = { path = ".", editable = true }
-scikit-learn = ">=1.2.0"
+requires = [
+  "setuptools>=62.1",
+  "setuptools_scm[toml]>=8.0.0",
+  "wheel",
+]
+build-backend = "setuptools.build_meta"
 
-[tool.pixi.tasks]
-
-[tool.pixi.feature.foo.dependencies]
-xarray = "*"
-
-[tool.pixi.environments]
-bar = ["foo"]
-
-[tool.pixi.dependencies]
-numpy = ">=1.10.0,<2"
+[project]
+name = "setuptools_test"
+requires-python = ">=3.11"
+dependencies = [
+  'numpy>=1.20.0,<2',
+  'pandas>=1.0.0,<3',
+  'xarray>=2021.1.0',
+]
diff --git a/tests/test_data/pyproject_pixi.toml b/tests/test_data/pyproject_pixi.toml
new file mode 100644
index 0000000..b06e4c5
--- /dev/null
+++ b/tests/test_data/pyproject_pixi.toml
@@ -0,0 +1,30 @@
+[project]
+authors         = [{ name = "Scientific Python Developers"}]
+name            = "tests"
+description     = "This is just a dummy package for testing the spec 0 update github action and should not be used"
+requires-python = ">=3.10"
+version         = "0.1.0"
+dependencies    = ["ipython>=8.7.0,<4", "numpy[foo,bar]>=1.10.0,<2"]
+
+[build-system]
+build-backend = "hatchling.build"
+requires      = ["hatchling"]
+
+[tool.pixi.workspace]
+channels  = ["conda-forge"]
+platforms = ["linux-64"]
+
+[tool.pixi.pypi-dependencies]
+tests        = { path = ".", editable = true }
+scikit-learn = ">=1.2.0"
+
+[tool.pixi.tasks]
+
+[tool.pixi.feature.foo.dependencies]
+xarray = "*"
+
+[tool.pixi.environments]
+bar = ["foo"]
+
+[tool.pixi.dependencies]
+numpy = ">=1.10.0,<2"
diff --git a/tests/test_data/pyproject_pixi_updated.toml b/tests/test_data/pyproject_pixi_updated.toml
new file mode 100644
index 0000000..a780ef7
--- /dev/null
+++ b/tests/test_data/pyproject_pixi_updated.toml
@@ -0,0 +1,30 @@
+[project]
+authors         = [{ name = "Scientific Python Developers"}]
+name            = "tests"
+description     = "This is just a dummy package for testing the spec 0 update github action and should not be used"
+requires-python = ">=3.11"
+version         = "0.1.0"
+dependencies    = ["ipython>=8.8.0,<4", "numpy[foo,bar]>=1.25.0,<2"]
+
+[build-system]
+build-backend = "hatchling.build"
+requires      = ["hatchling"]
+
+[tool.pixi.workspace]
+channels  = ["conda-forge"]
+platforms = ["linux-64"]
+
+[tool.pixi.pypi-dependencies]
+tests        = { path = ".", editable = true }
+scikit-learn = ">=1.3.0"
+
+[tool.pixi.tasks]
+
+[tool.pixi.feature.foo.dependencies]
+xarray = ">=2023.1.0"
+
+[tool.pixi.environments]
+bar = ["foo"]
+
+[tool.pixi.dependencies]
+numpy = ">=1.25.0,<2"
diff --git a/tests/test_data/pyproject_updated.toml b/tests/test_data/pyproject_updated.toml
index a780ef7..8698dbb 100644
--- a/tests/test_data/pyproject_updated.toml
+++ b/tests/test_data/pyproject_updated.toml
@@ -1,30 +1,16 @@
-[project]
-authors         = [{ name = "Scientific Python Developers"}]
-name            = "tests"
-description     = "This is just a dummy package for testing the spec 0 update github action and should not be used"
-requires-python = ">=3.11"
-version         = "0.1.0"
-dependencies    = ["ipython>=8.8.0,<4", "numpy[foo,bar]>=1.25.0,<2"]
-
 [build-system]
-build-backend = "hatchling.build"
-requires      = ["hatchling"]
-
-[tool.pixi.workspace]
-channels  = ["conda-forge"]
-platforms = ["linux-64"]
-
-[tool.pixi.pypi-dependencies]
-tests        = { path = ".", editable = true }
-scikit-learn = ">=1.3.0"
+requires = [
+  "setuptools>=62.1",
+  "setuptools_scm[toml]>=8.0.0",
+  "wheel",
+]
+build-backend = "setuptools.build_meta"
 
-[tool.pixi.tasks]
-
-[tool.pixi.feature.foo.dependencies]
-xarray = ">=2023.1.0"
-
-[tool.pixi.environments]
-bar = ["foo"]
-
-[tool.pixi.dependencies]
-numpy = ">=1.25.0,<2"
+[project]
+name = "setuptools_test"
+requires-python = ">=3.11"
+dependencies = [
+  'numpy>=1.25.0,<2',
+  'pandas>=1.0.0,<3',
+  'xarray>=2023.1.0',
+]
diff --git a/tests/test_update_pyproject_toml.py b/tests/test_update_pyproject_toml.py
index 40397fb..494f7a8 100644
--- a/tests/test_update_pyproject_toml.py
+++ b/tests/test_update_pyproject_toml.py
@@ -9,3 +9,12 @@ def test_update_pyproject_toml():
     update_pyproject_toml(pyproject_data, test_schedule)
 
     assert pyproject_data == expected
+
+
+def test_update_pyproject_toml_with_pixi():
+    expected = read_toml("tests/test_data/pyproject_pixi_updated.toml")
+    pyproject_data = read_toml("tests/test_data/pyproject_pixi.toml")
+    test_schedule = read_schedule("tests/test_data/test_schedule.json")
+    update_pyproject_toml(pyproject_data, test_schedule)
+
+    assert pyproject_data == expected

From 31c3862f99b827e7fee4a801f701bfee0db3dc3c Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 11:04:52 -0800
Subject: [PATCH 03/10] Taken action from
 https://github.com/savente93/spec0-schedule

---
 .github/workflows/release_schedule.yaml |  72 +++++++++++++++
 action.yaml                             |   2 +-
 spec0_versions.py                       | 111 +++++++++++++-----------
 3 files changed, 133 insertions(+), 52 deletions(-)
 create mode 100644 .github/workflows/release_schedule.yaml

diff --git a/.github/workflows/release_schedule.yaml b/.github/workflows/release_schedule.yaml
new file mode 100644
index 0000000..627926a
--- /dev/null
+++ b/.github/workflows/release_schedule.yaml
@@ -0,0 +1,72 @@
+name: Generate release schedule artifacts
+on:
+  schedule:
+    # At 00:00 on day-of-month 2 in every 3rd month. (i.e. every quarter)
+    # 2nd is chosen to avoid fencepost errors
+    - cron: "0 0 2 */3 *"
+  push:
+    branches:
+      - "main"
+  pull_request:
+  # On demand
+  workflow_dispatch:
+
+jobs:
+  create-artifacts:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          # We're going to make a tag that we can we release so we'll need the full history for that
+          fetch-depth: 0
+
+      - uses: prefix-dev/setup-pixi@v0.9.2
+        with:
+          pixi-version: "v0.49.0"
+
+      - name: Generate artifacts
+        run: |
+          pixi run generate-schedule --locked
+
+      - name: Test json artifact
+        run: |
+          cat schedule.json | jq
+
+      - name: setup git
+        run: |
+          # git will complain if we don't do this first
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: determine tag name
+        id: tag_name
+        run: |
+          echo "TAG_NAME=$(date '+%Y-Q%q')" >> "$GITHUB_OUTPUT"
+      - name: Commit artifacts and create tag
+        env:
+          GH_TOKEN: ${{ secrets.PAT }}
+        run: |
+          git add schedule.md chart.md schedule.json
+          git commit -m "generate schedule for ${{ steps.tag_name.outputs.TAG_NAME }} release" || echo "No changes to commit"
+          git tag ${{ steps.tag_name.outputs.TAG_NAME }}
+          git push origin main
+          git push origin tag ${{ steps.tag_name.outputs.TAG_NAME }}
+
+      - name: Publish github release
+        uses: softprops/action-gh-release@v2
+        env:
+          GH_TOKEN: ${{ secrets.PAT }}
+        with:
+          generate_release_notes: true
+          tag_name: ${{ steps.tag_name.outputs.TAG_NAME }}
+          make_latest: true
+          files: |
+            schedule.md
+            chart.md
+            schedule.json
+
+permissions:
+  contents: write
diff --git a/action.yaml b/action.yaml
index 120ad0d..283fd85 100644
--- a/action.yaml
+++ b/action.yaml
@@ -58,7 +58,7 @@ runs:
           echo "Regenerating schedule.json..."
           pixi run generate-schedule --locked
         if diff -q schedule.json "${{ github.workspace }}/$SCHEDULE_FILE" >/dev/null; then
-            echo "Source and destination have identical contents – nothing to move."
+            echo "Source and destination have identical contents - nothing to move."
         else
             mv schedule.json "${{ github.workspace }}/$SCHEDULE_FILE"
           fi
diff --git a/spec0_versions.py b/spec0_versions.py
index 8786f45..5789dd3 100644
--- a/spec0_versions.py
+++ b/spec0_versions.py
@@ -1,77 +1,93 @@
 import requests
-import json
 import collections
 from datetime import datetime, timedelta
 
 import pandas as pd
-from packaging.version import Version
+from packaging.version import Version, InvalidVersion
 
 
-PY_RELEASES = {
+py_releases = {
     "3.8": "Oct 14, 2019",
     "3.9": "Oct 5, 2020",
     "3.10": "Oct 4, 2021",
     "3.11": "Oct 24, 2022",
     "3.12": "Oct 2, 2023",
     "3.13": "Oct 7, 2024",
+    "3.14": "Oct 7, 2025",
 }
-CORE_PACKAGES = [
-    "ipython",
-    "matplotlib",
-    "networkx",
+core_packages = [
+    # Path(x).stem for x in glob("../core-projects/*.md") if "_index" not in x
     "numpy",
+    "scipy",
+    "matplotlib",
     "pandas",
     "scikit-image",
+    "networkx",
     "scikit-learn",
-    "scipy",
     "xarray",
+    "ipython",
     "zarr",
 ]
-PLUS_36_MONTHS = timedelta(days=int(365 * 3))
-PLUS_24_MONTHS = timedelta(days=int(365 * 2))
+plus36 = timedelta(days=int(365 * 3))
+plus24 = timedelta(days=int(365 * 2))
 
 # Release data
-# We put the cutoff at 3 quarters ago - we do not use "just" -9 months
-# to avoid the content of the quarter to change depending on when we
-# generate this file during the current quarter.
-CURRENT_DATE = pd.Timestamp.now()
-CURRENT_QUARTER_START = pd.Timestamp(
-    CURRENT_DATE.year, (CURRENT_DATE.quarter - 1) * 3 + 1, 1
+
+# put cutoff 3 quarters ago – we do not use "just" -9 month,
+# to avoid the content of the quarter to change depending on when we generate this
+# file during the current quarter.
+
+current_date = pd.Timestamp.now()
+current_quarter_start = pd.Timestamp(
+    current_date.year, (current_date.quarter - 1) * 3 + 1, 1
 )
-CUTOFF = CURRENT_QUARTER_START - pd.DateOffset(months=9)
+cutoff = current_quarter_start - pd.DateOffset(months=9)
 
 
-def get_release_dates(package, support_time=PLUS_24_MONTHS):
+def get_release_dates(package, support_time=plus24):
     releases = {}
+
     print(f"Querying pypi.org for {package} versions...", end="", flush=True)
     response = requests.get(
         f"https://pypi.org/simple/{package}",
         headers={"Accept": "application/vnd.pypi.simple.v1+json"},
     ).json()
     print("OK")
+
     file_date = collections.defaultdict(list)
     for f in response["files"]:
-        if f["filename"].endswith(".tar.gz") or f["filename"].endswith(".zip"):
-            continue
         ver = f["filename"].split("-")[1]
         try:
             version = Version(ver)
-        except Exception:
+        except InvalidVersion as e:
+            print(f"Error: '{ver}' is an invalid version for '{package}'. Reason: {e}")
             continue
+
         if version.is_prerelease or version.micro != 0:
             continue
-        release_date = pd.Timestamp(f["upload-time"]).tz_localize(None)
+
+        release_date = None
+        for format in ["%Y-%m-%dT%H:%M:%S.%fZ", "%Y-%m-%dT%H:%M:%SZ"]:
+            try:
+                release_date = datetime.strptime(f["upload-time"], format)
+            except ValueError as e:
+                print(f"Error parsing invalid date: {e}")
+
         if not release_date:
             continue
+
         file_date[version].append(release_date)
+
     release_date = {v: min(file_date[v]) for v in file_date}
+
     for ver, release_date in sorted(release_date.items()):
         drop_date = release_date + support_time
-        if drop_date >= CUTOFF:
+        if drop_date >= cutoff:
             releases[ver] = {
                 "release_date": release_date,
                 "drop_date": drop_date,
             }
+
     return releases
 
 
@@ -79,23 +95,27 @@ def get_release_dates(package, support_time=PLUS_24_MONTHS):
     "python": {
         version: {
             "release_date": datetime.strptime(release_date, "%b %d, %Y"),
-            "drop_date": datetime.strptime(release_date, "%b %d, %Y") + PLUS_36_MONTHS,
+            "drop_date": datetime.strptime(release_date, "%b %d, %Y") + plus36,
         }
-        for version, release_date in PY_RELEASES.items()
+        for version, release_date in py_releases.items()
     }
 }
-package_releases |= {package: get_release_dates(package) for package in CORE_PACKAGES}
-# Filter all items whose drop_date are in the past
+
+package_releases |= {package: get_release_dates(package) for package in core_packages}
+
+# filter all items whose drop_date are in the past
 package_releases = {
     package: {
         version: dates
         for version, dates in releases.items()
-        if dates["drop_date"] > CUTOFF
+        if dates["drop_date"] > cutoff
     }
     for package, releases in package_releases.items()
 }
 
+
 # Save Gantt chart
+
 print("Saving Mermaid chart to chart.md")
 with open("chart.md", "w") as fh:
     fh.write(
@@ -104,6 +124,7 @@ def get_release_dates(package, support_time=PLUS_24_MONTHS):
 axisFormat %m / %Y
 title Support Window"""
     )
+
     for name, releases in package_releases.items():
         fh.write(f"\n\nsection {name}")
         for version, dates in releases.items():
@@ -113,6 +134,7 @@ def get_release_dates(package, support_time=PLUS_24_MONTHS):
     fh.write("\n")
 
 # Print drop schedule
+
 data = []
 for k, versions in package_releases.items():
     for v, dates in versions.items():
@@ -124,30 +146,15 @@ def get_release_dates(package, support_time=PLUS_24_MONTHS):
                 pd.to_datetime(dates["drop_date"]),
             )
         )
+
 df = pd.DataFrame(data, columns=["package", "version", "release", "drop"])
+
 df["quarter"] = df["drop"].dt.to_period("Q")
-df["new_min_version"] = (
-    df[["package", "version", "quarter"]].groupby("package").shift(-1)["version"]
-)
-dq = df.set_index(["quarter", "package"]).sort_index().dropna()
-new_min_versions = (
-    dq.groupby(["quarter", "package"]).agg({"new_min_version": "max"}).reset_index()
-)
 
-# We want to build a dict with the structure [{start_date: timestamp, packages: {package: lower_bound}}]
-new_min_versions_list = []
-for q, packages in new_min_versions.groupby("quarter"):
-    package_lower_bounds = {
-        p: str(v) for p, v in packages.drop("quarter", axis=1).itertuples(index=False)
-    }
-    # jq is really insistent the Z should be there
-    quarter_start_time_str = str(q.start_time.isoformat()) + "Z"
-    new_min_versions_list.append(
-        {"start_date": quarter_start_time_str, "packages": package_lower_bounds}
-    )
-print("Saving drop schedule to schedule.json")
-with open("schedule.json", "w") as f:
-    f.write(json.dumps(new_min_versions_list, sort_keys=True))
+dq = df.set_index(["quarter", "package"]).sort_index()
+
+
+print("Saving drop schedule to schedule.md")
 
 
 def pad_table(table):
@@ -165,6 +172,7 @@ def pad_table(table):
             line += f"| {str.ljust(entry, width)} "
         line += "|"
         padded_table.append(line)
+
     return padded_table
 
 
@@ -184,6 +192,7 @@ def make_table(sub):
             else f"{rel_min.strftime('%b %Y')} and {rel_max.strftime('%b %Y')}"
         )
         table.append(f"|{package:<15}|{version_range:<19}|released {rel_range}|")
+
     return pad_table(table)
 
 
@@ -195,13 +204,13 @@ def make_quarter(quarter, dq):
     return "\n".join(table)
 
 
-print("Saving drop schedule to schedule.md")
 with open("schedule.md", "w") as fh:
-    # We collect packages 6 month in the past, and drop the first quarter
+    # we collect package 6 month in the past, and drop the first quarter
     # as we might have filtered some of the packages out depending on
     # when we ran the script.
     tb = []
     for quarter in list(sorted(set(dq.index.get_level_values(0))))[1:]:
         tb.append(make_quarter(quarter, dq))
+
     fh.write("\n\n".join(tb))
     fh.write("\n")

From a3fb6f366ba7701421e3a4884429e3d34a833605 Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 11:09:12 -0800
Subject: [PATCH 04/10] Undo update of spec0_action but with upstream changes

---
 .github/workflows/release_schedule.yaml |  7 +-
 spec0_versions.py                       | 98 ++++++++++++-------------
 2 files changed, 51 insertions(+), 54 deletions(-)

diff --git a/.github/workflows/release_schedule.yaml b/.github/workflows/release_schedule.yaml
index 627926a..dabdb70 100644
--- a/.github/workflows/release_schedule.yaml
+++ b/.github/workflows/release_schedule.yaml
@@ -7,7 +7,6 @@ on:
   push:
     branches:
       - "main"
-  pull_request:
   # On demand
   workflow_dispatch:
 
@@ -47,9 +46,9 @@ jobs:
           echo "TAG_NAME=$(date '+%Y-Q%q')" >> "$GITHUB_OUTPUT"
       - name: Commit artifacts and create tag
         env:
-          GH_TOKEN: ${{ secrets.PAT }}
+          GH_TOKEN: ${{ secrets.RELEASE_PAT }}
         run: |
-          git add schedule.md chart.md schedule.json
+          git add -f schedule.md chart.md schedule.json
           git commit -m "generate schedule for ${{ steps.tag_name.outputs.TAG_NAME }} release" || echo "No changes to commit"
           git tag ${{ steps.tag_name.outputs.TAG_NAME }}
           git push origin main
@@ -58,7 +57,7 @@ jobs:
       - name: Publish github release
         uses: softprops/action-gh-release@v2
         env:
-          GH_TOKEN: ${{ secrets.PAT }}
+          GH_TOKEN: ${{ secrets.RELEASE_PAT }}
         with:
           generate_release_notes: true
           tag_name: ${{ steps.tag_name.outputs.TAG_NAME }}
diff --git a/spec0_versions.py b/spec0_versions.py
index 5789dd3..4b7a0f8 100644
--- a/spec0_versions.py
+++ b/spec0_versions.py
@@ -1,4 +1,5 @@
 import requests
+import json
 import collections
 from datetime import datetime, timedelta
 
@@ -6,7 +7,7 @@
 from packaging.version import Version, InvalidVersion
 
 
-py_releases = {
+PY_RELEASES = {
     "3.8": "Oct 14, 2019",
     "3.9": "Oct 5, 2020",
     "3.10": "Oct 4, 2021",
@@ -15,79 +16,69 @@
     "3.13": "Oct 7, 2024",
     "3.14": "Oct 7, 2025",
 }
-core_packages = [
-    # Path(x).stem for x in glob("../core-projects/*.md") if "_index" not in x
-    "numpy",
-    "scipy",
+CORE_PACKAGES = [
+    "ipython",
     "matplotlib",
+    "networkx",
+    "numpy",
     "pandas",
     "scikit-image",
-    "networkx",
     "scikit-learn",
+    "scipy",
     "xarray",
-    "ipython",
     "zarr",
 ]
-plus36 = timedelta(days=int(365 * 3))
-plus24 = timedelta(days=int(365 * 2))
+PLUS_36_MONTHS = timedelta(days=int(365 * 3))
+PLUS_24_MONTHS = timedelta(days=int(365 * 2))
 
 # Release data
-
-# put cutoff 3 quarters ago – we do not use "just" -9 month,
-# to avoid the content of the quarter to change depending on when we generate this
-# file during the current quarter.
-
-current_date = pd.Timestamp.now()
-current_quarter_start = pd.Timestamp(
-    current_date.year, (current_date.quarter - 1) * 3 + 1, 1
+# We put the cutoff at 3 quarters ago - we do not use "just" -9 months
+# to avoid the content of the quarter to change depending on when we
+# generate this file during the current quarter.
+CURRENT_DATE = pd.Timestamp.now()
+CURRENT_QUARTER_START = pd.Timestamp(
+    CURRENT_DATE.year, (CURRENT_DATE.quarter - 1) * 3 + 1, 1
 )
-cutoff = current_quarter_start - pd.DateOffset(months=9)
+CUTOFF = CURRENT_QUARTER_START - pd.DateOffset(months=9)
 
 
-def get_release_dates(package, support_time=plus24):
+def get_release_dates(package, support_time=PLUS_24_MONTHS):
     releases = {}
-
     print(f"Querying pypi.org for {package} versions...", end="", flush=True)
     response = requests.get(
         f"https://pypi.org/simple/{package}",
         headers={"Accept": "application/vnd.pypi.simple.v1+json"},
     ).json()
     print("OK")
-
     file_date = collections.defaultdict(list)
     for f in response["files"]:
+        if f["filename"].endswith(".tar.gz") or f["filename"].endswith(".zip"):
+            continue
         ver = f["filename"].split("-")[1]
         try:
             version = Version(ver)
         except InvalidVersion as e:
             print(f"Error: '{ver}' is an invalid version for '{package}'. Reason: {e}")
             continue
-
         if version.is_prerelease or version.micro != 0:
             continue
-
         release_date = None
         for format in ["%Y-%m-%dT%H:%M:%S.%fZ", "%Y-%m-%dT%H:%M:%SZ"]:
             try:
                 release_date = datetime.strptime(f["upload-time"], format)
             except ValueError as e:
                 print(f"Error parsing invalid date: {e}")
-
         if not release_date:
             continue
-
         file_date[version].append(release_date)
-
     release_date = {v: min(file_date[v]) for v in file_date}
-
     for ver, release_date in sorted(release_date.items()):
         drop_date = release_date + support_time
-        if drop_date >= cutoff:
+        if drop_date >= CUTOFF:
             releases[ver] = {
                 "release_date": release_date,
                 "drop_date": drop_date,
             }
-
     return releases
 
 
@@ -95,27 +86,23 @@ def get_release_dates(package, support_time=plus24):
     "python": {
         version: {
             "release_date": datetime.strptime(release_date, "%b %d, %Y"),
-            "drop_date": datetime.strptime(release_date, "%b %d, %Y") + plus36,
+            "drop_date": datetime.strptime(release_date, "%b %d, %Y") + PLUS_36_MONTHS,
         }
-        for version, release_date in py_releases.items()
+        for version, release_date in PY_RELEASES.items()
     }
 }
-
-package_releases |= {package: get_release_dates(package) for package in core_packages}
-
-# filter all items whose drop_date are in the past
+package_releases |= {package: get_release_dates(package) for package in CORE_PACKAGES}
+# Filter all items whose drop_date are in the past
 package_releases = {
     package: {
         version: dates
         for version, dates in releases.items()
-        if dates["drop_date"] > cutoff
+        if dates["drop_date"] > CUTOFF
     }
     for package, releases in package_releases.items()
 }
 
-
 # Save Gantt chart
-
 print("Saving Mermaid chart to chart.md")
 with open("chart.md", "w") as fh:
     fh.write(
@@ -124,7 +111,6 @@ def get_release_dates(package, support_time=plus24):
 axisFormat %m / %Y
 title Support Window"""
     )
-
     for name, releases in package_releases.items():
         fh.write(f"\n\nsection {name}")
         for version, dates in releases.items():
@@ -134,7 +120,6 @@ def get_release_dates(package, support_time=plus24):
     fh.write("\n")
 
 # Print drop schedule
-
 data = []
 for k, versions in package_releases.items():
     for v, dates in versions.items():
@@ -146,15 +131,30 @@ def get_release_dates(package, support_time=plus24):
                 pd.to_datetime(dates["drop_date"]),
             )
         )
-
 df = pd.DataFrame(data, columns=["package", "version", "release", "drop"])
-
 df["quarter"] = df["drop"].dt.to_period("Q")
+df["new_min_version"] = (
+    df[["package", "version", "quarter"]].groupby("package").shift(-1)["version"]
+)
+dq = df.set_index(["quarter", "package"]).sort_index().dropna()
+new_min_versions = (
+    dq.groupby(["quarter", "package"]).agg({"new_min_version": "max"}).reset_index()
+)
 
-dq = df.set_index(["quarter", "package"]).sort_index()
-
-
-print("Saving drop schedule to schedule.md")
+# We want to build a dict with the structure [{start_date: timestamp, packages: {package: lower_bound}}]
+new_min_versions_list = []
+for q, packages in new_min_versions.groupby("quarter"):
+    package_lower_bounds = {
+        p: str(v) for p, v in packages.drop("quarter", axis=1).itertuples(index=False)
+    }
+    # jq is really insistent the Z should be there
+    quarter_start_time_str = str(q.start_time.isoformat()) + "Z"
+    new_min_versions_list.append(
+        {"start_date": quarter_start_time_str, "packages": package_lower_bounds}
+    )
+print("Saving drop schedule to schedule.json")
+with open("schedule.json", "w") as f:
+    f.write(json.dumps(new_min_versions_list, sort_keys=True))
 
 
 def pad_table(table):
@@ -172,7 +172,6 @@ def pad_table(table):
             line += f"| {str.ljust(entry, width)} "
         line += "|"
         padded_table.append(line)
-
     return padded_table
 
 
@@ -192,7 +191,6 @@ def make_table(sub):
             else f"{rel_min.strftime('%b %Y')} and {rel_max.strftime('%b %Y')}"
         )
         table.append(f"|{package:<15}|{version_range:<19}|released {rel_range}|")
-
     return pad_table(table)
 
 
@@ -204,13 +202,13 @@ def make_quarter(quarter, dq):
     return "\n".join(table)
 
 
+print("Saving drop schedule to schedule.md")
 with open("schedule.md", "w") as fh:
-    # we collect package 6 month in the past, and drop the first quarter
+    # We collect packages 6 month in the past, and drop the first quarter
     # as we might have filtered some of the packages out depending on
     # when we ran the script.
     tb = []
     for quarter in list(sorted(set(dq.index.get_level_values(0))))[1:]:
         tb.append(make_quarter(quarter, dq))
-
     fh.write("\n\n".join(tb))
     fh.write("\n")

From 73026bc6430cfc971792eed45261a75bc1282836 Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 11:14:06 -0800
Subject: [PATCH 05/10] Update readme

---
 readme.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/readme.md b/readme.md
index 3c1532f..60fe253 100644
--- a/readme.md
+++ b/readme.md
@@ -41,7 +41,7 @@ It should update any of the packages listed in the `dependency`, or `tool.pixi.*
 For examples of before and after you can see [./tests/test_data/pyproject.toml](./tests/test_data/pyproject.toml) and [./tests/test_data/pyproject_updated.toml](./tests/test_data/pyproject_updated.toml) respectively.
 Other tools are not yet supported, but we are open to feature requests.
 
-The newest lower bounds will be downloaded from [https://github.com/savente93/SPEC0-schedule](https://github.com/savente93/SPEC0-schedule) but you should not have to worry about this.
+The newest lower bounds will be downloaded from [https://github.com/scientific-python/spec0-action](https://github.com/scientific-python/spec0-action) but you should not have to worry about this.
 
 ### Parameters
 

From 9d8bba4c935e42aeaab16ed89295fc859064eaf6 Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 11:22:59 -0800
Subject: [PATCH 06/10] Prototype change

---
 action.yaml | 30 ++++++------------------------
 1 file changed, 6 insertions(+), 24 deletions(-)

diff --git a/action.yaml b/action.yaml
index 283fd85..c7b8b4f 100644
--- a/action.yaml
+++ b/action.yaml
@@ -34,52 +34,34 @@ runs:
   steps:
     - name: Checkout code
       uses: actions/checkout@v6
-
     - name: Set up Git
       shell: bash
       run: |
         git config user.name "Scientific Python [bot]"
         git config user.email "scientific-python@users.noreply.github.com"
-
     - uses: prefix-dev/setup-pixi@v0.9.3
       name: Setup Pixi
       with:
         pixi-version: v0.49.0
         manifest-path: ${{ github.action_path }}/pyproject.toml
-
-    - name: Regenerate schedule file if necessary
-      shell: bash
-      env:
-        SCHEDULE_FILE: ${{ inputs.schedule_path }}
-        GH_TOKEN: ${{ inputs.token }}
-      run: |
-        set -e
-        if [ ! -f "${{ github.workspace }}/$SCHEDULE_FILE" ]; then
-          echo "Regenerating schedule.json..."
-          pixi run generate-schedule --locked
-        if diff -q schedule.json "${{ github.workspace }}/$SCHEDULE_FILE" >/dev/null; then
-            echo "Source and destination have identical contents - nothing to move."
-        else
-            mv schedule.json "${{ github.workspace }}/$SCHEDULE_FILE"
-          fi
-        else
-          echo "Schedule file already exists at $SCHEDULE_FILE"
-        fi
-
+    - name: Fetch Schedule from release
+      uses: robinraju/release-downloader@v1.3
+      with:
+        repository: "savente93/SPEC0-schedule"
+        latest: true
+        fileName: "schedule.json"
     - name: Run update script
       shell: bash
       run: |
         set -e
         echo "Updating ${{inputs.project_file_name}} using schedule ${{inputs.schedule_path}}"
         pixi run --manifest-path ${{ github.action_path }}/pyproject.toml update-dependencies  "${{ github.workspace }}/${{ inputs.project_file_name }}" "${{ github.workspace }}/${{ inputs.schedule_path }}"
-
     - name: Show changes (dry-run)
       if: ${{ inputs.create_pr != 'true' }}
       shell: bash
       run: |
         echo "Dry run: showing changes that would be committed"
         git --no-pager diff ${{ inputs.project_file_name }}
-
     - name: Create Pull Request
       if: ${{ inputs.create_pr == 'true' }}
       uses: peter-evans/create-pull-request@v7

From a46765383905e249f4c283ab26c615b1416c048f Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 11:41:36 -0800
Subject: [PATCH 07/10] Show changes

---
 action.yaml | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/action.yaml b/action.yaml
index c7b8b4f..27b09f1 100644
--- a/action.yaml
+++ b/action.yaml
@@ -56,11 +56,10 @@ runs:
         set -e
         echo "Updating ${{inputs.project_file_name}} using schedule ${{inputs.schedule_path}}"
         pixi run --manifest-path ${{ github.action_path }}/pyproject.toml update-dependencies  "${{ github.workspace }}/${{ inputs.project_file_name }}" "${{ github.workspace }}/${{ inputs.schedule_path }}"
-    - name: Show changes (dry-run)
-      if: ${{ inputs.create_pr != 'true' }}
+    - name: Show changes
       shell: bash
       run: |
-        echo "Dry run: showing changes that would be committed"
+        echo "Showing changes that would be committed"
         git --no-pager diff ${{ inputs.project_file_name }}
     - name: Create Pull Request
       if: ${{ inputs.create_pr == 'true' }}

From ba570331ab63e0e41567c385bdbfdacd134a0ea5 Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 11:45:34 -0800
Subject: [PATCH 08/10] dont make pr if empty?

---
 action.yaml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/action.yaml b/action.yaml
index 27b09f1..61b5c14 100644
--- a/action.yaml
+++ b/action.yaml
@@ -56,11 +56,15 @@ runs:
         set -e
         echo "Updating ${{inputs.project_file_name}} using schedule ${{inputs.schedule_path}}"
         pixi run --manifest-path ${{ github.action_path }}/pyproject.toml update-dependencies  "${{ github.workspace }}/${{ inputs.project_file_name }}" "${{ github.workspace }}/${{ inputs.schedule_path }}"
-    - name: Show changes
+    - name: Show changes and skip if none
       shell: bash
       run: |
         echo "Showing changes that would be committed"
         git --no-pager diff ${{ inputs.project_file_name }}
+        if git diff --quiet ${{ inputs.project_file_name }}; then
+          echo "No changes to commit"
+          exit 0
+        fi
     - name: Create Pull Request
       if: ${{ inputs.create_pr == 'true' }}
       uses: peter-evans/create-pull-request@v7

From 1ae2327299b349f6d63e50dc29069977ab4aa5bd Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 11:52:02 -0800
Subject: [PATCH 09/10] no idea

---
 action.yaml | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/action.yaml b/action.yaml
index 61b5c14..8f25614 100644
--- a/action.yaml
+++ b/action.yaml
@@ -56,17 +56,18 @@ runs:
         set -e
         echo "Updating ${{inputs.project_file_name}} using schedule ${{inputs.schedule_path}}"
         pixi run --manifest-path ${{ github.action_path }}/pyproject.toml update-dependencies  "${{ github.workspace }}/${{ inputs.project_file_name }}" "${{ github.workspace }}/${{ inputs.schedule_path }}"
-    - name: Show changes and skip if none
+    - name: Changes
       shell: bash
       run: |
         echo "Showing changes that would be committed"
         git --no-pager diff ${{ inputs.project_file_name }}
         if git diff --quiet ${{ inputs.project_file_name }}; then
-          echo "No changes to commit"
-          exit 0
+          echo "changes_detected=false" >> $GITHUB_OUTPUT
+        else
+          echo "changes_detected=true" >> $GITHUB_OUTPUT
         fi
     - name: Create Pull Request
-      if: ${{ inputs.create_pr == 'true' }}
+      if: ${{ inputs.create_pr == 'true' }} && steps.Changes.outputs.changes_detected == 'true'
       uses: peter-evans/create-pull-request@v7
       with:
         token: ${{ inputs.token }}

From 2e0c0654795b7ba4357e5eb4bd7ee3ad60517273 Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Wed, 3 Dec 2025 12:02:38 -0800
Subject: [PATCH 10/10] Maybe?

---
 action.yaml | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/action.yaml b/action.yaml
index 8f25614..3cfa502 100644
--- a/action.yaml
+++ b/action.yaml
@@ -1,6 +1,8 @@
+# action.yml
 name: "Update SPEC 0 dependencies"
 description: "Update the lower bounds of Python dependencies covered by the Scientific Python SPEC 0 support schedule"
 author: Scientific Python Developers
+
 inputs:
   target_branch:
     description: "Target branch for the pull request"
@@ -54,29 +56,31 @@ runs:
       shell: bash
       run: |
         set -e
-        echo "Updating ${{inputs.project_file_name}} using schedule ${{inputs.schedule_path}}"
-        pixi run --manifest-path ${{ github.action_path }}/pyproject.toml update-dependencies  "${{ github.workspace }}/${{ inputs.project_file_name }}" "${{ github.workspace }}/${{ inputs.schedule_path }}"
+        echo "Updating ${{ inputs.project_file_name }} using schedule ${{ inputs.schedule_path }}"
+        pixi run --manifest-path ${{ github.action_path }}/pyproject.toml update-dependencies "${{ github.workspace }}/${{ inputs.project_file_name }}" "${{ github.workspace }}/${{ inputs.schedule_path }}"
     - name: Changes
+      id: changes
       shell: bash
       run: |
         echo "Showing changes that would be committed"
         git --no-pager diff ${{ inputs.project_file_name }}
         if git diff --quiet ${{ inputs.project_file_name }}; then
-          echo "changes_detected=false" >> $GITHUB_OUTPUT
+          echo "changes_detected=false" >> "$GITHUB_OUTPUT"
         else
-          echo "changes_detected=true" >> $GITHUB_OUTPUT
+          echo "changes_detected=true"  >> "$GITHUB_OUTPUT"
         fi
     - name: Create Pull Request
-      if: ${{ inputs.create_pr == 'true' }} && steps.Changes.outputs.changes_detected == 'true'
+      if: ${{ fromJSON(inputs.create_pr) && fromJSON(steps.changes.outputs.changes_detected) }}
       uses: peter-evans/create-pull-request@v7
       with:
         token: ${{ inputs.token }}
         commit-message: ${{ inputs.commit_msg }}
-        path: ${{ inputs.project_file_name }}
         title: ${{ inputs.pr_title }}
         body: "This PR was created automatically"
         base: ${{ inputs.target_branch }}
         branch: update-spec0-dependencies-${{ github.run_id }}
+        add-paths: |
+          ${{ inputs.project_file_name }}
 
 branding:
   icon: "check-square"