From 174c8d0d337aaceb21b755dd2a39df3ea649a773 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Sun, 6 Jul 2025 00:30:28 +0200
Subject: [PATCH 01/15] Adding python multi-file with excel example

---
 .../LICENSE                                   | 201 ++++++++++++++++++
 .../README.md                                 |  27 +++
 .../app.yaml                                  |  11 +
 .../inputs/input.xlsx                         | Bin 0 -> 6361 bytes
 .../main.py                                   | 159 ++++++++++++++
 .../outputs/.keep                             |   2 +
 .../requirements.txt                          |   2 +
 7 files changed, 402 insertions(+)
 create mode 100644 python-ortools-multiknapsack-multiexcel/LICENSE
 create mode 100644 python-ortools-multiknapsack-multiexcel/README.md
 create mode 100644 python-ortools-multiknapsack-multiexcel/app.yaml
 create mode 100644 python-ortools-multiknapsack-multiexcel/inputs/input.xlsx
 create mode 100644 python-ortools-multiknapsack-multiexcel/main.py
 create mode 100644 python-ortools-multiknapsack-multiexcel/outputs/.keep
 create mode 100644 python-ortools-multiknapsack-multiexcel/requirements.txt

diff --git a/python-ortools-multiknapsack-multiexcel/LICENSE b/python-ortools-multiknapsack-multiexcel/LICENSE
new file mode 100644
index 00000000..2c27ec72
--- /dev/null
+++ b/python-ortools-multiknapsack-multiexcel/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
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+   APPENDIX: How to apply the Apache License to your work.
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+      To apply the Apache License to your work, attach the following
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diff --git a/python-ortools-multiknapsack-multiexcel/README.md b/python-ortools-multiknapsack-multiexcel/README.md
new file mode 100644
index 00000000..da6bdf8b
--- /dev/null
+++ b/python-ortools-multiknapsack-multiexcel/README.md
@@ -0,0 +1,27 @@
+# Nextmv Python OR-Tools Multi-Knapsack Multi-Excel
+
+Example for running a Python application on the Nextmv Platform using the
+OR-Tools package with the multi-file input/output format and Excel I/O files.
+We solve a multi-knapsack Mixed Integer Programming problem.
+
+1. Install packages.
+
+    ```bash
+    pip3 install -r requirements.txt
+    ```
+
+1. Run the app.
+
+    ```bash
+    python3 main.py -duration 30 -provider SCIP
+    ```
+
+## Next steps
+
+* Open `main.py` and modify the model.
+* Visit our [docs][docs] and [blog][blog]. Need more assistance?
+  [Contact][contact] us!
+
+[docs]: https://docs.nextmv.io
+[blog]: https://www.nextmv.io/blog
+[contact]: https://www.nextmv.io/contact
diff --git a/python-ortools-multiknapsack-multiexcel/app.yaml b/python-ortools-multiknapsack-multiexcel/app.yaml
new file mode 100644
index 00000000..f0de77f9
--- /dev/null
+++ b/python-ortools-multiknapsack-multiexcel/app.yaml
@@ -0,0 +1,11 @@
+# This manifest holds the information the app needs to run on the Nextmv Cloud.
+type: python
+runtime: ghcr.io/nextmv-io/runtime/python:3.11
+# List all files/directories that should be included in the app. Globbing
+# (e.g.: configs/*.json) is supported.
+files:
+  - main.py
+python:
+  # Packages the app depends on need to be listed in a requirements.txt file
+  # that is referenced here. All listed packages will get bundled with the app.
+  pip-requirements: requirements.txt
diff --git a/python-ortools-multiknapsack-multiexcel/inputs/input.xlsx b/python-ortools-multiknapsack-multiexcel/inputs/input.xlsx
new file mode 100644
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diff --git a/python-ortools-multiknapsack-multiexcel/main.py b/python-ortools-multiknapsack-multiexcel/main.py
new file mode 100644
index 00000000..429f4cbc
--- /dev/null
+++ b/python-ortools-multiknapsack-multiexcel/main.py
@@ -0,0 +1,159 @@
+import time
+
+import nextmv
+import pandas as pd
+from ortools.linear_solver import pywraplp
+
+# Status of the solver after optimizing.
+STATUS = {
+    pywraplp.Solver.FEASIBLE: "suboptimal",
+    pywraplp.Solver.INFEASIBLE: "infeasible",
+    pywraplp.Solver.OPTIMAL: "optimal",
+    pywraplp.Solver.UNBOUNDED: "unbounded",
+    pywraplp.Solver.ABNORMAL: "abnormal",
+    pywraplp.Solver.NOT_SOLVED: "not_solved",
+    pywraplp.Solver.MODEL_INVALID: "model_invalid",
+}
+
+
+def main() -> None:
+    """Entry point for the program."""
+
+    options = nextmv.Options(
+        nextmv.Option("input", str, "inputs/", "Path to input file.", False),
+        nextmv.Option("output", str, "outputs/", "Path to output file.", False),
+        nextmv.Option("duration", int, 30, "Max runtime duration (in seconds).", False),
+        nextmv.Option("provider", str, "SCIP", "Solver provider.", False),
+    )
+
+    input = nextmv.load(
+        options=options,
+        path=options.input,
+        data_files=[
+            nextmv.DataFile(
+                name="input.xlsx",
+                loader=lambda path: pd.read_excel(path, sheet_name="items"),
+                input_data_key="items",
+            ),
+            nextmv.DataFile(
+                name="input.xlsx",
+                loader=lambda path: pd.read_excel(path, sheet_name="knapsacks"),
+                input_data_key="knapsacks",
+            ),
+        ],
+        input_format=nextmv.InputFormat.MULTI_FILE,
+    )
+
+    nextmv.log("Solving multi-knapsack problem:")
+    nextmv.log(f"  - items: {len(input.data.get('items', []))}")
+    nextmv.log(f"  - knapsacks: {len(input.data.get('knapsacks', []))}")
+
+    model = DecisionModel()
+    output = model.solve(input)
+    nextmv.write(
+        output,
+        path=options.output,
+    )
+
+
+class DecisionModel(nextmv.Model):
+    def solve(self, input: nextmv.Input) -> nextmv.Output:
+        """Solves the given problem and returns the solution."""
+
+        start_time = time.time()
+        nextmv.redirect_stdout()  # Solver chatter is logged to stderr.
+
+        # Creates the solver.
+        solver = pywraplp.Solver.CreateSolver(input.options.provider)
+        solver.SetTimeLimit(input.options.duration * 1000)
+
+        # Unpack the input data.
+        if "items" not in input.data or "knapsacks" not in input.data:
+            raise ValueError("Input data must contain items and knapsacks.")
+        items: pd.DataFrame = input.data["items"]
+        knapsacks: pd.DataFrame = input.data["knapsacks"]
+
+        # Initialize variables.
+        assignments = {}
+        for _, knapsack in knapsacks.iterrows():
+            for _, item in items.iterrows():
+                # Create a binary variable for each item in each knapsack.
+                assignments[(knapsack["id"], item["id"])] = solver.IntVar(0, 1, f"{knapsack['id']}_{item['id']}")
+
+        # Make sure the knapsacks' capacities are not exceeded.
+        for _, knapsack in knapsacks.iterrows():
+            solver.Add(
+                solver.Sum(assignments[(knapsack["id"], item["id"])] * item["weight"] for _, item in items.iterrows())
+                <= knapsack["capacity"]
+            )
+
+        # Maximize the total value of the items in the knapsacks.
+        solver.Maximize(
+            solver.Sum(
+                assignments[(knapsack["id"], item["id"])] * item["value"]
+                for _, knapsack in knapsacks.iterrows()
+                for _, item in items.iterrows()
+            )
+        )
+
+        # Solves the problem.
+        status = solver.Solve()
+
+        # Determines which items were chosen.
+        chosen_items = [
+            (knapsack["id"], item["id"])
+            for _, knapsack in knapsacks.iterrows()
+            for _, item in items.iterrows()
+            if assignments[(knapsack["id"], item["id"])].solution_value() > 0.5
+        ]
+
+        statistics = nextmv.Statistics(
+            run=nextmv.RunStatistics(duration=time.time() - start_time),
+            result=nextmv.ResultStatistics(
+                duration=solver.WallTime() / 1000,
+                value=solver.Objective().Value(),
+                custom={
+                    "status": STATUS.get(status, "unknown"),
+                    "variables": solver.NumVariables(),
+                    "constraints": solver.NumConstraints(),
+                },
+            ),
+        )
+
+        df = pd.DataFrame(
+            {
+                "knapsack_id": [knapsack_id for knapsack_id, _ in chosen_items],
+                "item_id": [item_id for _, item_id in chosen_items],
+            }
+        )
+        df.to_excel(
+            f"{input.options.output}/assignments.xlsx",
+            index=False,
+            sheet_name="assignments",
+        )
+
+        return nextmv.Output(
+            options=input.options,
+            solution_files=[
+                nextmv.SolutionFile(
+                    name="assignments.xlsx",
+                    data=pd.DataFrame(
+                        {
+                            "knapsack_id": [knapsack_id for knapsack_id, _ in chosen_items],
+                            "item_id": [item_id for _, item_id in chosen_items],
+                        }
+                    ),
+                    writer=lambda path, data: data.to_excel(path, index=False, sheet_name="assignments"),
+                ),
+                nextmv.csv_solution_file(
+                    "assignments",
+                    data=[{"knapsack_id": knapsack_id, "item_id": item_id} for knapsack_id, item_id in chosen_items],
+                ),
+            ],
+            statistics=statistics,
+            output_format=nextmv.OutputFormat.MULTI_FILE,
+        )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/python-ortools-multiknapsack-multiexcel/outputs/.keep b/python-ortools-multiknapsack-multiexcel/outputs/.keep
new file mode 100644
index 00000000..d55a9686
--- /dev/null
+++ b/python-ortools-multiknapsack-multiexcel/outputs/.keep
@@ -0,0 +1,2 @@
+This file is just here to make sure that an 'outputs' directory exists as the app expects it.
+This directory is automatically created by the Nextmv Platform when running the app remotely.
diff --git a/python-ortools-multiknapsack-multiexcel/requirements.txt b/python-ortools-multiknapsack-multiexcel/requirements.txt
new file mode 100644
index 00000000..821bfeac
--- /dev/null
+++ b/python-ortools-multiknapsack-multiexcel/requirements.txt
@@ -0,0 +1,2 @@
+ortools==9.12.4544
+nextmv==0.26.3

From 9357943c2923dd8b535070227dad2017af27a8ce Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Mon, 7 Jul 2025 04:12:55 +0200
Subject: [PATCH 02/15] Ignoring multi-file output dirs

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 556a1170..a2e5f09f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -176,6 +176,7 @@ main.jar
 !Output.Java
 output.json
 output/
+outputs/
 
 # Ignore app binary files
 go-highs-orderfulfillment/go-highs-orderfulfillment

From d1977692534c5701f0021ee36f6c9cdcc03c644d Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Mon, 7 Jul 2025 04:33:23 +0200
Subject: [PATCH 03/15] Adding readme test

---
 .../0.sh                                      |  1 +
 .../0.sh.golden                               | 44 +++++++++++++++++++
 .../1.sh                                      |  1 +
 .../1.sh.golden                               |  3 ++
 .nextmv/readme/workflow-configuration.yml     |  4 ++
 .../requirements.txt                          |  4 +-
 6 files changed, 55 insertions(+), 2 deletions(-)
 create mode 100644 .nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh
 create mode 100644 .nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh.golden
 create mode 100644 .nextmv/readme/python-ortools-multiknapsack-multiexcel/1.sh
 create mode 100644 .nextmv/readme/python-ortools-multiknapsack-multiexcel/1.sh.golden

diff --git a/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh
new file mode 100644
index 00000000..bc88b5d1
--- /dev/null
+++ b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh
@@ -0,0 +1 @@
+pip3 install -r requirements.txt
diff --git a/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh.golden b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh.golden
new file mode 100644
index 00000000..2e75324e
--- /dev/null
+++ b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh.golden
@@ -0,0 +1,44 @@
+Collecting nextmv==0.28.5 (from -r requirements.txt (line 1))
+  Using cached nextmv-0.28.5-py3-none-any.whl.metadata (15 kB)
+Collecting ortools==9.14.6206 (from -r requirements.txt (line 2))
+  Downloading ortools-9.14.6206-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl.metadata (3.3 kB)
+Requirement already satisfied: pydantic>=2.5.2 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from nextmv==0.28.5->-r requirements.txt (line 1)) (2.11.3)
+Requirement already satisfied: pyyaml>=6.0.1 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from nextmv==0.28.5->-r requirements.txt (line 1)) (6.0.2)
+Requirement already satisfied: requests>=2.31.0 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from nextmv==0.28.5->-r requirements.txt (line 1)) (2.32.3)
+Requirement already satisfied: urllib3>=2.1.0 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from nextmv==0.28.5->-r requirements.txt (line 1)) (2.4.0)
+Requirement already satisfied: absl-py>=2.0.0 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from ortools==9.14.6206->-r requirements.txt (line 2)) (2.2.2)
+Requirement already satisfied: numpy>=1.13.3 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from ortools==9.14.6206->-r requirements.txt (line 2)) (2.2.5)
+Requirement already satisfied: pandas>=2.0.0 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from ortools==9.14.6206->-r requirements.txt (line 2)) (2.2.3)
+Collecting protobuf<6.32,>=6.31.1 (from ortools==9.14.6206->-r requirements.txt (line 2))
+  Downloading protobuf-6.31.1-cp39-abi3-manylinux2014_x86_64.whl.metadata (593 bytes)
+Requirement already satisfied: typing-extensions>=4.12 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from ortools==9.14.6206->-r requirements.txt (line 2)) (4.13.2)
+Requirement already satisfied: immutabledict>=3.0.0 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from ortools==9.14.6206->-r requirements.txt (line 2)) (4.2.1)
+Requirement already satisfied: python-dateutil>=2.8.2 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from pandas>=2.0.0->ortools==9.14.6206->-r requirements.txt (line 2)) (2.9.0.post0)
+Requirement already satisfied: pytz>=2020.1 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from pandas>=2.0.0->ortools==9.14.6206->-r requirements.txt (line 2)) (2025.2)
+Requirement already satisfied: tzdata>=2022.7 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from pandas>=2.0.0->ortools==9.14.6206->-r requirements.txt (line 2)) (2025.2)
+Requirement already satisfied: annotated-types>=0.6.0 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from pydantic>=2.5.2->nextmv==0.28.5->-r requirements.txt (line 1)) (0.7.0)
+Requirement already satisfied: pydantic-core==2.33.1 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from pydantic>=2.5.2->nextmv==0.28.5->-r requirements.txt (line 1)) (2.33.1)
+Requirement already satisfied: typing-inspection>=0.4.0 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from pydantic>=2.5.2->nextmv==0.28.5->-r requirements.txt (line 1)) (0.4.0)
+Requirement already satisfied: six>=1.5 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from python-dateutil>=2.8.2->pandas>=2.0.0->ortools==9.14.6206->-r requirements.txt (line 2)) (1.17.0)
+Requirement already satisfied: charset-normalizer<4,>=2 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from requests>=2.31.0->nextmv==0.28.5->-r requirements.txt (line 1)) (3.4.1)
+Requirement already satisfied: idna<4,>=2.5 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from requests>=2.31.0->nextmv==0.28.5->-r requirements.txt (line 1)) (3.10)
+Requirement already satisfied: certifi>=2017.4.17 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from requests>=2.31.0->nextmv==0.28.5->-r requirements.txt (line 1)) (2025.1.31)
+Using cached nextmv-0.28.5-py3-none-any.whl (99 kB)
+Downloading ortools-9.14.6206-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl (27.7 MB)
+   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 27.7/27.7 MB 52.6 MB/s eta 0:00:00
+Downloading protobuf-6.31.1-cp39-abi3-manylinux2014_x86_64.whl (321 kB)
+Installing collected packages: protobuf, ortools, nextmv
+  Attempting uninstall: protobuf
+    Found existing installation: protobuf 5.29.4
+    Uninstalling protobuf-5.29.4:
+      Successfully uninstalled protobuf-5.29.4
+  Attempting uninstall: ortools
+    Found existing installation: ortools 9.12.4544
+    Uninstalling ortools-9.12.4544:
+      Successfully uninstalled ortools-9.12.4544
+  Attempting uninstall: nextmv
+    Found existing installation: nextmv 0.29.0.dev0
+    Uninstalling nextmv-0.29.0.dev0:
+      Successfully uninstalled nextmv-0.29.0.dev0
+
+Successfully installed nextmv-0.28.5 ortools-9.14.6206 protobuf-6.31.1
diff --git a/.nextmv/readme/python-ortools-multiknapsack-multiexcel/1.sh b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/1.sh
new file mode 100644
index 00000000..814546b6
--- /dev/null
+++ b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/1.sh
@@ -0,0 +1 @@
+python3 main.py -duration 30 -provider SCIP
diff --git a/.nextmv/readme/python-ortools-multiknapsack-multiexcel/1.sh.golden b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/1.sh.golden
new file mode 100644
index 00000000..2194214e
--- /dev/null
+++ b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/1.sh.golden
@@ -0,0 +1,3 @@
+Solving multi-knapsack problem:
+  - items: 11
+  - knapsacks: 2
diff --git a/.nextmv/readme/workflow-configuration.yml b/.nextmv/readme/workflow-configuration.yml
index 7eb8251c..a374b94b 100644
--- a/.nextmv/readme/workflow-configuration.yml
+++ b/.nextmv/readme/workflow-configuration.yml
@@ -166,6 +166,10 @@ apps:
         silent: true
       - name: 2.sh
         skip: true
+  - name: python-ortools-multiknapsack-multiexcel
+    scripts:
+      - name: 0.sh
+        silent: true
   - name: python-ortools-region-allocation
     scripts:
       - name: 0.sh
diff --git a/python-ortools-multiknapsack-multiexcel/requirements.txt b/python-ortools-multiknapsack-multiexcel/requirements.txt
index 821bfeac..62814407 100644
--- a/python-ortools-multiknapsack-multiexcel/requirements.txt
+++ b/python-ortools-multiknapsack-multiexcel/requirements.txt
@@ -1,2 +1,2 @@
-ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0.dev0
+ortools==9.14.6206

From 39376aa3f3311b58d2fe70ca0d5c867fb0f174b6 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Mon, 7 Jul 2025 04:51:17 +0200
Subject: [PATCH 04/15] Silencing expectation

---
 .../0.sh.golden                               | 44 -------------------
 1 file changed, 44 deletions(-)

diff --git a/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh.golden b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh.golden
index 2e75324e..e69de29b 100644
--- a/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh.golden
+++ b/.nextmv/readme/python-ortools-multiknapsack-multiexcel/0.sh.golden
@@ -1,44 +0,0 @@
-Collecting nextmv==0.28.5 (from -r requirements.txt (line 1))
-  Using cached nextmv-0.28.5-py3-none-any.whl.metadata (15 kB)
-Collecting ortools==9.14.6206 (from -r requirements.txt (line 2))
-  Downloading ortools-9.14.6206-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl.metadata (3.3 kB)
-Requirement already satisfied: pydantic>=2.5.2 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from nextmv==0.28.5->-r requirements.txt (line 1)) (2.11.3)
-Requirement already satisfied: pyyaml>=6.0.1 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from nextmv==0.28.5->-r requirements.txt (line 1)) (6.0.2)
-Requirement already satisfied: requests>=2.31.0 in /home/marius/.asdf/installs/python/3.13.3/lib/python3.13/site-packages (from nextmv==0.28.5->-r requirements.txt (line 1)) (2.32.3)
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-Collecting protobuf<6.32,>=6.31.1 (from ortools==9.14.6206->-r requirements.txt (line 2))
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-Using cached nextmv-0.28.5-py3-none-any.whl (99 kB)
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-   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 27.7/27.7 MB 52.6 MB/s eta 0:00:00
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-Installing collected packages: protobuf, ortools, nextmv
-  Attempting uninstall: protobuf
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-    Uninstalling protobuf-5.29.4:
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-    Found existing installation: nextmv 0.29.0.dev0
-    Uninstalling nextmv-0.29.0.dev0:
-      Successfully uninstalled nextmv-0.29.0.dev0
-
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From be9bb5208ba2972a1e3eb48b95e477fcbd8c54d3 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Mon, 7 Jul 2025 23:52:53 +0200
Subject: [PATCH 05/15] Iterate dfs only once

---
 .../main.py                                   | 22 +++++++++----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/python-ortools-multiknapsack-multiexcel/main.py b/python-ortools-multiknapsack-multiexcel/main.py
index 429f4cbc..1f76fa2e 100644
--- a/python-ortools-multiknapsack-multiexcel/main.py
+++ b/python-ortools-multiknapsack-multiexcel/main.py
@@ -70,29 +70,29 @@ def solve(self, input: nextmv.Input) -> nextmv.Output:
         # Unpack the input data.
         if "items" not in input.data or "knapsacks" not in input.data:
             raise ValueError("Input data must contain items and knapsacks.")
-        items: pd.DataFrame = input.data["items"]
-        knapsacks: pd.DataFrame = input.data["knapsacks"]
+        items_df: pd.DataFrame = input.data["items"]
+        knapsacks_df: pd.DataFrame = input.data["knapsacks"]
+        items = items_df.to_dict("records")
+        knapsacks = knapsacks_df.to_dict("records")
 
         # Initialize variables.
         assignments = {}
-        for _, knapsack in knapsacks.iterrows():
-            for _, item in items.iterrows():
+        for knapsack in knapsacks:
+            for item in items:
                 # Create a binary variable for each item in each knapsack.
                 assignments[(knapsack["id"], item["id"])] = solver.IntVar(0, 1, f"{knapsack['id']}_{item['id']}")
 
         # Make sure the knapsacks' capacities are not exceeded.
-        for _, knapsack in knapsacks.iterrows():
+        for knapsack in knapsacks:
             solver.Add(
-                solver.Sum(assignments[(knapsack["id"], item["id"])] * item["weight"] for _, item in items.iterrows())
+                solver.Sum(assignments[(knapsack["id"], item["id"])] * item["weight"] for item in items)
                 <= knapsack["capacity"]
             )
 
         # Maximize the total value of the items in the knapsacks.
         solver.Maximize(
             solver.Sum(
-                assignments[(knapsack["id"], item["id"])] * item["value"]
-                for _, knapsack in knapsacks.iterrows()
-                for _, item in items.iterrows()
+                assignments[(knapsack["id"], item["id"])] * item["value"] for knapsack in knapsacks for item in items
             )
         )
 
@@ -102,8 +102,8 @@ def solve(self, input: nextmv.Input) -> nextmv.Output:
         # Determines which items were chosen.
         chosen_items = [
             (knapsack["id"], item["id"])
-            for _, knapsack in knapsacks.iterrows()
-            for _, item in items.iterrows()
+            for knapsack in knapsacks
+            for item in items
             if assignments[(knapsack["id"], item["id"])].solution_value() > 0.5
         ]
 

From aef606098052c127913f391ba71683493c70f0a1 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Mon, 7 Jul 2025 23:58:33 +0200
Subject: [PATCH 06/15] Fixing item integrity

---
 python-ortools-multiknapsack-multiexcel/main.py | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/python-ortools-multiknapsack-multiexcel/main.py b/python-ortools-multiknapsack-multiexcel/main.py
index 1f76fa2e..bceabd1c 100644
--- a/python-ortools-multiknapsack-multiexcel/main.py
+++ b/python-ortools-multiknapsack-multiexcel/main.py
@@ -89,6 +89,10 @@ def solve(self, input: nextmv.Input) -> nextmv.Output:
                 <= knapsack["capacity"]
             )
 
+        # Ensure that each item can only be assigned once.
+        for item in items:
+            solver.Add(solver.Sum(assignments[(knapsack["id"], item["id"])] for knapsack in knapsacks) <= 1)
+
         # Maximize the total value of the items in the knapsacks.
         solver.Maximize(
             solver.Sum(
@@ -120,18 +124,6 @@ def solve(self, input: nextmv.Input) -> nextmv.Output:
             ),
         )
 
-        df = pd.DataFrame(
-            {
-                "knapsack_id": [knapsack_id for knapsack_id, _ in chosen_items],
-                "item_id": [item_id for _, item_id in chosen_items],
-            }
-        )
-        df.to_excel(
-            f"{input.options.output}/assignments.xlsx",
-            index=False,
-            sheet_name="assignments",
-        )
-
         return nextmv.Output(
             options=input.options,
             solution_files=[

From 536907fa5bc2d5c8cebccdd02d601a0725c696a8 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Tue, 8 Jul 2025 00:17:09 +0200
Subject: [PATCH 07/15] Fixing item integrity and paths

---
 .../main/java/com/nextmv/example/Main.java    | 52 ++++++++++++++-----
 .../main/java/com/nextmv/example/Options.java |  2 +-
 .../main/java/com/nextmv/example/Output.java  | 18 +++++--
 3 files changed, 53 insertions(+), 19 deletions(-)

diff --git a/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Main.java b/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Main.java
index 0506f02b..883091a8 100644
--- a/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Main.java
+++ b/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Main.java
@@ -22,17 +22,8 @@ public static void main(String[] args) {
         System.err.println("Input directory does not exist: " + options.getInputPath());
         System.exit(1);
       }
-      // Create output directory if it does not exist.
-      Path outputPath = Paths.get(options.getOutputPath());
-      if (!outputPath.toFile().exists()) {
-        if (!outputPath.toFile().mkdirs()) {
-          System.err.println("Failed to create output directory: " + options.getOutputPath());
-          System.exit(1);
-        }
-      } else if (!outputPath.toFile().isDirectory()) {
-        System.err.println("Output path is not a directory: " + options.getOutputPath());
-        System.exit(1);
-      }
+      // Prepare output directory.
+      prepareOutputDirectory(options.getOutputPath());
 
       // Load input.
       ExcelReader inputReader = new ExcelReader();
@@ -82,6 +73,15 @@ public static void main(String[] args) {
         model.addConstr(knapsackExpr, GRB.LESS_EQUAL, knapsack.getCapacity(), "capacity_" + knapsack.getId());
       }
 
+      // Ensure that each item can only be assigned once.
+      for (int j = 0; j < inputItems.size(); ++j) {
+        GRBLinExpr itemExpr = new GRBLinExpr();
+        for (int i = 0; i < input.getKnapsacks().size(); ++i) {
+          itemExpr.addTerm(1.0, variables.get(i * inputItems.size() + j));
+        }
+        model.addConstr(itemExpr, GRB.LESS_EQUAL, 1.0, "item_assignment_" + inputItems.get(j).getId());
+      }
+
       // Create the objective function.
       GRBLinExpr objectiveExpr = new GRBLinExpr();
       for (int i = 0; i < input.getKnapsacks().size(); ++i) {
@@ -111,8 +111,8 @@ public static void main(String[] args) {
       // Write solution to Excel file.
       ExcelWriter outputWriter = new ExcelWriter();
       try {
-        String outputFilePath = Paths.get(options.getOutputPath(), "output.xlsx").toString();
-        outputWriter.writeSolutionToExcel(solution, outputFilePath);
+        String solutionPath = Paths.get(options.getOutputPath(), "solutions", "solution.xlsx").toString();
+        outputWriter.writeSolutionToExcel(solution, solutionPath);
       } catch (Exception e) {
         System.err.println("Error writing output file: " + e.getMessage());
         System.exit(1);
@@ -128,7 +128,7 @@ public static void main(String[] args) {
           model.get(GRB.IntAttr.NumConstrs));
 
       // Write output.
-      Output.write(output);
+      Output.write(output, options.getOutputPath());
 
       // Dispose of model and environment.
       model.dispose();
@@ -140,6 +140,30 @@ public static void main(String[] args) {
     }
   }
 
+  private static void prepareOutputDirectory(String outputPath) {
+    // Prepare output directory if it does not exist.
+    Path solutionsPath = Paths.get(outputPath, "solutions");
+    Path statisticsPath = Paths.get(outputPath, "statistics");
+    if (!solutionsPath.toFile().exists()) {
+      if (!solutionsPath.toFile().mkdirs()) {
+        System.err.println("Failed to create solutions directory: " + solutionsPath.toString());
+        System.exit(1);
+      }
+    } else if (!solutionsPath.toFile().isDirectory()) {
+      System.err.println("Solutions path is not a directory: " + solutionsPath.toString());
+      System.exit(1);
+    }
+    if (!statisticsPath.toFile().exists()) {
+      if (!statisticsPath.toFile().mkdirs()) {
+        System.err.println("Failed to create statistics directory: " + statisticsPath.toString());
+        System.exit(1);
+      }
+    } else if (!statisticsPath.toFile().isDirectory()) {
+      System.err.println("Statistics path is not a directory: " + statisticsPath.toString());
+      System.exit(1);
+    }
+  }
+
   public static String convertStatus(int status) {
     switch (status) {
       case GRB.Status.LOADED:
diff --git a/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Options.java b/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Options.java
index 6ee2ef4c..e9b3eb7a 100644
--- a/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Options.java
+++ b/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Options.java
@@ -29,7 +29,7 @@ public static Options fromArguments(String[] args) {
     // And all output files will get collected in the "solutions" directory, after
     // the run.
     String inputPath = "inputs/";
-    String outputPath = "outputs/solutions/";
+    String outputPath = "outputs/";
     int duration = 30;
 
     for (int i = 0; i < args.length; ++i) {
diff --git a/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Output.java b/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Output.java
index 81c74348..eaa3f688 100644
--- a/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Output.java
+++ b/java-gurobi-multiknapsack-multiexcel/src/main/java/com/nextmv/example/Output.java
@@ -2,6 +2,8 @@
 
 import java.util.List;
 import java.util.ArrayList;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 
 import com.google.gson.Gson;
 
@@ -49,10 +51,18 @@ public Output(
     this.statistics.result.custom.variables = variables;
   }
 
-  public static void write(Output output) {
-    // Always write to stdout.
+  public static void write(Output output, String outputPath) {
+    // Always write to {outputPath}/statistics/statistics.json
+    // as required by convention.
     Gson gson = new Gson();
-    System.out.println(gson.toJson(output));
-    return;
+    String json = gson.toJson(output);
+    java.nio.file.Path path = Paths.get(outputPath, "statistics", "statistics.json");
+    try {
+      Files.createDirectories(path.getParent());
+      Files.writeString(path, json);
+    } catch (java.io.IOException e) {
+      System.err.println("Failed to write output: " + e.getMessage());
+      System.exit(1);
+    }
   }
 }

From 6c1aa698b9db18d609c1439a812695e2029b1624 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Tue, 8 Jul 2025 18:07:15 +0200
Subject: [PATCH 08/15] Reduce nesting

---
 .../main.py                                   | 32 +++++++++----------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/python-ortools-multiknapsack-multiexcel/main.py b/python-ortools-multiknapsack-multiexcel/main.py
index bceabd1c..81578e76 100644
--- a/python-ortools-multiknapsack-multiexcel/main.py
+++ b/python-ortools-multiknapsack-multiexcel/main.py
@@ -124,24 +124,24 @@ def solve(self, input: nextmv.Input) -> nextmv.Output:
             ),
         )
 
+        excel_sol_file = nextmv.SolutionFile(
+            name="assignments.xlsx",
+            data=pd.DataFrame(
+                {
+                    "knapsack_id": [knapsack_id for knapsack_id, _ in chosen_items],
+                    "item_id": [item_id for _, item_id in chosen_items],
+                }
+            ),
+            writer=lambda path, data: data.to_excel(path, index=False, sheet_name="assignments"),
+        )
+        csv_sol_file = nextmv.csv_solution_file(
+            "assignments",
+            data=[{"knapsack_id": knapsack_id, "item_id": item_id} for knapsack_id, item_id in chosen_items],
+        )
+
         return nextmv.Output(
             options=input.options,
-            solution_files=[
-                nextmv.SolutionFile(
-                    name="assignments.xlsx",
-                    data=pd.DataFrame(
-                        {
-                            "knapsack_id": [knapsack_id for knapsack_id, _ in chosen_items],
-                            "item_id": [item_id for _, item_id in chosen_items],
-                        }
-                    ),
-                    writer=lambda path, data: data.to_excel(path, index=False, sheet_name="assignments"),
-                ),
-                nextmv.csv_solution_file(
-                    "assignments",
-                    data=[{"knapsack_id": knapsack_id, "item_id": item_id} for knapsack_id, item_id in chosen_items],
-                ),
-            ],
+            solution_files=[excel_sol_file, csv_sol_file],
             statistics=statistics,
             output_format=nextmv.OutputFormat.MULTI_FILE,
         )

From bc5322a8db88023c8eb28f2fa9ecc0eefd369778 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Tue, 8 Jul 2025 18:09:20 +0200
Subject: [PATCH 09/15] Reducing nesting

---
 .../main.py                                   | 24 +++++++++----------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/python-ortools-multiknapsack-multiexcel/main.py b/python-ortools-multiknapsack-multiexcel/main.py
index 81578e76..5d02fb64 100644
--- a/python-ortools-multiknapsack-multiexcel/main.py
+++ b/python-ortools-multiknapsack-multiexcel/main.py
@@ -26,21 +26,21 @@ def main() -> None:
         nextmv.Option("provider", str, "SCIP", "Solver provider.", False),
     )
 
+    items_input_file = nextmv.DataFile(
+        name="input.xlsx",
+        loader=lambda path: pd.read_excel(path, sheet_name="items"),
+        input_data_key="items",
+    )
+    knapsacks_input_file = nextmv.DataFile(
+        name="input.xlsx",
+        loader=lambda path: pd.read_excel(path, sheet_name="knapsacks"),
+        input_data_key="knapsacks",
+    )
+
     input = nextmv.load(
         options=options,
         path=options.input,
-        data_files=[
-            nextmv.DataFile(
-                name="input.xlsx",
-                loader=lambda path: pd.read_excel(path, sheet_name="items"),
-                input_data_key="items",
-            ),
-            nextmv.DataFile(
-                name="input.xlsx",
-                loader=lambda path: pd.read_excel(path, sheet_name="knapsacks"),
-                input_data_key="knapsacks",
-            ),
-        ],
+        data_files=[items_input_file, knapsacks_input_file],
         input_format=nextmv.InputFormat.MULTI_FILE,
     )
 

From a0de9fc75c723d13c65ed98e82ab2333fff85e98 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Tue, 8 Jul 2025 18:21:27 +0200
Subject: [PATCH 10/15] Bumping nextmv and nextpipe versions

---
 .nextmv/release/requirements.txt                       |  2 +-
 python-ampl-facilitylocation/requirements.txt          |  2 +-
 python-ampl-knapsack/requirements.txt                  |  2 +-
 python-ampl-priceoptimization/requirements.txt         |  2 +-
 python-gurobi-knapsack/main.ipynb                      |  2 +-
 python-gurobi-knapsack/requirements.txt                |  2 +-
 python-gurobi-price-optimization/main.ipynb            | 10 +++++-----
 python-hello-world/requirements.txt                    |  2 +-
 python-hexaly-generic/requirements.txt                 |  2 +-
 python-hexaly-knapsack/requirements.txt                |  2 +-
 python-highs-knapsack/main.ipynb                       |  2 +-
 python-highs-knapsack/requirements.txt                 |  2 +-
 python-nextroute/main.ipynb                            |  2 +-
 python-nextroute/requirements.txt                      |  2 +-
 python-ortools-costflow/requirements.txt               |  2 +-
 python-ortools-demandforecasting/requirements.txt      |  2 +-
 python-ortools-knapsack-multicsv/requirements.txt      |  2 +-
 python-ortools-knapsack/requirements.txt               |  2 +-
 .../requirements.txt                                   |  2 +-
 python-ortools-region-allocation/requirements.txt      |  2 +-
 python-ortools-routing/requirements.txt                |  2 +-
 python-ortools-shiftassignment/requirements.txt        |  2 +-
 python-ortools-shiftplanning/requirements.txt          |  2 +-
 python-pyomo-knapsack/requirements.txt                 |  2 +-
 python-pyomo-shiftassignment/requirements.txt          |  2 +-
 python-pyomo-shiftplanning/requirements.txt            |  2 +-
 python-pyoptinterface-knapsack/requirements.txt        |  2 +-
 python-pyvroom-routing/requirements.txt                |  2 +-
 python-tr-ortools-region-allocation/requirements.txt   |  2 +-
 python-verso-routing/requirements.txt                  |  2 +-
 .../README.md                                          |  4 ++--
 .../avocado-price-optimizer.ipynb                      |  2 +-
 .../requirements.txt                                   |  4 ++--
 python-wf-databricks/README.md                         |  4 ++--
 python-wf-databricks/hello-world-nextmv-app.ipynb      |  2 +-
 python-wf-databricks/requirements.txt                  |  4 ++--
 python-wf-ortools-region-allocation/requirements.txt   |  4 ++--
 python-xpress-knapsack/requirements.txt                |  2 +-
 38 files changed, 47 insertions(+), 47 deletions(-)

diff --git a/.nextmv/release/requirements.txt b/.nextmv/release/requirements.txt
index 042dce99..e72ad2e3 100644
--- a/.nextmv/release/requirements.txt
+++ b/.nextmv/release/requirements.txt
@@ -2,4 +2,4 @@ boto3>=1.34.33
 pyyaml>=6.0.1
 ruff>=0.1.7
 requests>=2.26.0
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ampl-facilitylocation/requirements.txt b/python-ampl-facilitylocation/requirements.txt
index 8f721c72..e6b8b264 100644
--- a/python-ampl-facilitylocation/requirements.txt
+++ b/python-ampl-facilitylocation/requirements.txt
@@ -17,5 +17,5 @@ ampl-module-open==20250206
 ampl-module-scip==20240724
 ampl-module-xpress==20241227
 
-nextmv==0.26.3
+nextmv==0.29.0
 pandas==2.2.2
diff --git a/python-ampl-knapsack/requirements.txt b/python-ampl-knapsack/requirements.txt
index 3663a8b5..170b2246 100644
--- a/python-ampl-knapsack/requirements.txt
+++ b/python-ampl-knapsack/requirements.txt
@@ -17,4 +17,4 @@ ampl-module-open==20250206
 ampl-module-scip==20240724
 ampl-module-xpress==20241227
 
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ampl-priceoptimization/requirements.txt b/python-ampl-priceoptimization/requirements.txt
index 90ef2f63..ff7b27d4 100644
--- a/python-ampl-priceoptimization/requirements.txt
+++ b/python-ampl-priceoptimization/requirements.txt
@@ -17,5 +17,5 @@ ampl-module-open==20250206
 ampl-module-scip==20240724
 ampl-module-xpress==20241227
 
-nextmv==0.26.3
+nextmv==0.29.0
 plotly==6.0.0
diff --git a/python-gurobi-knapsack/main.ipynb b/python-gurobi-knapsack/main.ipynb
index 9a4fe2fb..36f4b3df 100644
--- a/python-gurobi-knapsack/main.ipynb
+++ b/python-gurobi-knapsack/main.ipynb
@@ -315,7 +315,7 @@
         "    name=\"gurobi_model\",\n",
         "    requirements=[\n",
         "        \"gurobipy==11.0.0\",\n",
-        "        \"nextmv==0.26.3\",\n",
+        "        \"nextmv==0.29.0\",\n",
         "    ],\n",
         "    options=options,\n",
         ")\n",
diff --git a/python-gurobi-knapsack/requirements.txt b/python-gurobi-knapsack/requirements.txt
index 9e8f0b56..6883087e 100644
--- a/python-gurobi-knapsack/requirements.txt
+++ b/python-gurobi-knapsack/requirements.txt
@@ -1,2 +1,2 @@
 gurobipy==11.0.0
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-gurobi-price-optimization/main.ipynb b/python-gurobi-price-optimization/main.ipynb
index 9cd6d328..16047a84 100644
--- a/python-gurobi-price-optimization/main.ipynb
+++ b/python-gurobi-price-optimization/main.ipynb
@@ -330,7 +330,7 @@
         "model_configuration = nextmv.ModelConfiguration(\n",
         "    name=reg_app_name,\n",
         "    requirements=[\n",
-        "        \"nextmv==0.26.3\",\n",
+        "        \"nextmv==0.29.0\",\n",
         "        \"statsmodels==0.14.4\",\n",
         "        \"scikit-learn==1.6.1\",\n",
         "        \"pandas==2.2.2\"\n",
@@ -654,7 +654,7 @@
         "model_configuration = nextmv.ModelConfiguration(\n",
         "    name=\"avocado-price-optimizer\",\n",
         "    requirements=[\n",
-        "        \"nextmv==0.26.3\",\n",
+        "        \"nextmv==0.29.0\",\n",
         "        \"nextmv-gurobipy==0.3.0\",\n",
         "        \"plotly==6.0.0\"\n",
         "    ],\n",
@@ -1070,8 +1070,8 @@
       "source": [
         "%%writefile workflow/requirements.txt\n",
         "pandas==2.2.2\n",
-        "nextmv==0.26.3\n",
-        "nextpipe==0.1.3"
+        "nextmv==0.29.0\n",
+        "nextpipe==0.3.1"
       ]
     },
     {
@@ -1176,7 +1176,7 @@
       "name": "python",
       "nbconvert_exporter": "python",
       "pygments_lexer": "ipython3",
-      "version": "3.11.1"
+      "version": "3.13.3"
     }
   },
   "nbformat": 4,
diff --git a/python-hello-world/requirements.txt b/python-hello-world/requirements.txt
index 0e233293..c714e869 100644
--- a/python-hello-world/requirements.txt
+++ b/python-hello-world/requirements.txt
@@ -1,3 +1,3 @@
 # Define the packages required by your project here.
-nextmv==0.26.3
+nextmv==0.29.0
 plotly==6.0.0
diff --git a/python-hexaly-generic/requirements.txt b/python-hexaly-generic/requirements.txt
index 6b34be71..7c5af17e 100644
--- a/python-hexaly-generic/requirements.txt
+++ b/python-hexaly-generic/requirements.txt
@@ -3,4 +3,4 @@
 --extra-index-url https://pypi.org/simple
 
 hexaly==13.0.20240712
-nextmv==0.29.0.dev0
+nextmv==0.29.0
diff --git a/python-hexaly-knapsack/requirements.txt b/python-hexaly-knapsack/requirements.txt
index feb5f1ef..7c5af17e 100644
--- a/python-hexaly-knapsack/requirements.txt
+++ b/python-hexaly-knapsack/requirements.txt
@@ -3,4 +3,4 @@
 --extra-index-url https://pypi.org/simple
 
 hexaly==13.0.20240712
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-highs-knapsack/main.ipynb b/python-highs-knapsack/main.ipynb
index 895d9ddf..6cfc32b9 100644
--- a/python-highs-knapsack/main.ipynb
+++ b/python-highs-knapsack/main.ipynb
@@ -285,7 +285,7 @@
         "    name=\"highs_model\",\n",
         "    requirements=[\n",
         "        \"highspy==1.7.2\",\n",
-        "        \"nextmv==0.26.3\"\n",
+        "        \"nextmv==0.29.0\"\n",
         "    ],\n",
         "    options=options,\n",
         ")\n",
diff --git a/python-highs-knapsack/requirements.txt b/python-highs-knapsack/requirements.txt
index 342318b2..a486291a 100644
--- a/python-highs-knapsack/requirements.txt
+++ b/python-highs-knapsack/requirements.txt
@@ -1,2 +1,2 @@
 highspy==1.9.0
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-nextroute/main.ipynb b/python-nextroute/main.ipynb
index 0fddf8e3..aea98879 100644
--- a/python-nextroute/main.ipynb
+++ b/python-nextroute/main.ipynb
@@ -450,7 +450,7 @@
         "    name=\"nextroute_model\",\n",
         "    requirements=[\n",
         "        \"nextroute==1.11.0\",\n",
-        "        \"nextmv==0.26.3\"\n",
+        "        \"nextmv==0.29.0\"\n",
         "    ],\n",
         "    options=options,\n",
         ")\n",
diff --git a/python-nextroute/requirements.txt b/python-nextroute/requirements.txt
index d7387ceb..bb09b739 100644
--- a/python-nextroute/requirements.txt
+++ b/python-nextroute/requirements.txt
@@ -1,2 +1,2 @@
 nextroute==1.11.4
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ortools-costflow/requirements.txt b/python-ortools-costflow/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-ortools-costflow/requirements.txt
+++ b/python-ortools-costflow/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ortools-demandforecasting/requirements.txt b/python-ortools-demandforecasting/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-ortools-demandforecasting/requirements.txt
+++ b/python-ortools-demandforecasting/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ortools-knapsack-multicsv/requirements.txt b/python-ortools-knapsack-multicsv/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-ortools-knapsack-multicsv/requirements.txt
+++ b/python-ortools-knapsack-multicsv/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ortools-knapsack/requirements.txt b/python-ortools-knapsack/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-ortools-knapsack/requirements.txt
+++ b/python-ortools-knapsack/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ortools-multiknapsack-multiexcel/requirements.txt b/python-ortools-multiknapsack-multiexcel/requirements.txt
index 62814407..273fe821 100644
--- a/python-ortools-multiknapsack-multiexcel/requirements.txt
+++ b/python-ortools-multiknapsack-multiexcel/requirements.txt
@@ -1,2 +1,2 @@
-nextmv==0.29.0.dev0
+nextmv==0.29.0
 ortools==9.14.6206
diff --git a/python-ortools-region-allocation/requirements.txt b/python-ortools-region-allocation/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-ortools-region-allocation/requirements.txt
+++ b/python-ortools-region-allocation/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ortools-routing/requirements.txt b/python-ortools-routing/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-ortools-routing/requirements.txt
+++ b/python-ortools-routing/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ortools-shiftassignment/requirements.txt b/python-ortools-shiftassignment/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-ortools-shiftassignment/requirements.txt
+++ b/python-ortools-shiftassignment/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-ortools-shiftplanning/requirements.txt b/python-ortools-shiftplanning/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-ortools-shiftplanning/requirements.txt
+++ b/python-ortools-shiftplanning/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-pyomo-knapsack/requirements.txt b/python-pyomo-knapsack/requirements.txt
index fbe114f8..200dd4fe 100644
--- a/python-pyomo-knapsack/requirements.txt
+++ b/python-pyomo-knapsack/requirements.txt
@@ -1,2 +1,2 @@
 pyomo==6.8.0
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-pyomo-shiftassignment/requirements.txt b/python-pyomo-shiftassignment/requirements.txt
index fbe114f8..200dd4fe 100644
--- a/python-pyomo-shiftassignment/requirements.txt
+++ b/python-pyomo-shiftassignment/requirements.txt
@@ -1,2 +1,2 @@
 pyomo==6.8.0
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-pyomo-shiftplanning/requirements.txt b/python-pyomo-shiftplanning/requirements.txt
index fbe114f8..200dd4fe 100644
--- a/python-pyomo-shiftplanning/requirements.txt
+++ b/python-pyomo-shiftplanning/requirements.txt
@@ -1,2 +1,2 @@
 pyomo==6.8.0
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-pyoptinterface-knapsack/requirements.txt b/python-pyoptinterface-knapsack/requirements.txt
index da70bf89..c86d2996 100644
--- a/python-pyoptinterface-knapsack/requirements.txt
+++ b/python-pyoptinterface-knapsack/requirements.txt
@@ -2,4 +2,4 @@
 pyoptinterface[highs]==0.4.0
 
 # Other packages.
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-pyvroom-routing/requirements.txt b/python-pyvroom-routing/requirements.txt
index cc33e425..014d2537 100644
--- a/python-pyvroom-routing/requirements.txt
+++ b/python-pyvroom-routing/requirements.txt
@@ -1,2 +1,2 @@
 pyvroom==1.14.0
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-tr-ortools-region-allocation/requirements.txt b/python-tr-ortools-region-allocation/requirements.txt
index 821bfeac..78f34a56 100644
--- a/python-tr-ortools-region-allocation/requirements.txt
+++ b/python-tr-ortools-region-allocation/requirements.txt
@@ -1,2 +1,2 @@
 ortools==9.12.4544
-nextmv==0.26.3
+nextmv==0.29.0
diff --git a/python-verso-routing/requirements.txt b/python-verso-routing/requirements.txt
index 7a42e3cf..1c21b167 100644
--- a/python-verso-routing/requirements.txt
+++ b/python-verso-routing/requirements.txt
@@ -1,5 +1,5 @@
 # Define the packages required by your project here.
-nextmv==0.27.0
+nextmv==0.29.0
 plotly==6.0.0
 requests==2.32.4
 polyline==1.4.0
diff --git a/python-wf-databricks-ml-gurobi-price-optimization/README.md b/python-wf-databricks-ml-gurobi-price-optimization/README.md
index 16c75267..2b3a429f 100644
--- a/python-wf-databricks-ml-gurobi-price-optimization/README.md
+++ b/python-wf-databricks-ml-gurobi-price-optimization/README.md
@@ -13,8 +13,8 @@ The content of this worklflow is based on the [Gurobi example](https://colab.res
 - Nextmv API key
 - Databricks workspace access (with DATABRICKS_HOST and DATABRICKS_TOKEN)
 - The following Python packages (specified in `requirements.txt`):
-  - nextmv==0.26.3
-  - nextpipe==0.1.3
+  - nextmv==0.29.0
+  - nextpipe==0.3.1
   - pandas==2.2.3
   - databricks-sdk
 
diff --git a/python-wf-databricks-ml-gurobi-price-optimization/avocado-price-optimizer.ipynb b/python-wf-databricks-ml-gurobi-price-optimization/avocado-price-optimizer.ipynb
index bad68ebb..1b27f0b6 100644
--- a/python-wf-databricks-ml-gurobi-price-optimization/avocado-price-optimizer.ipynb
+++ b/python-wf-databricks-ml-gurobi-price-optimization/avocado-price-optimizer.ipynb
@@ -474,7 +474,7 @@
         "model_configuration = nextmv.ModelConfiguration(\n",
         "    name=\"avocado-price-optimizer\",\n",
         "    requirements=[\n",
-        "        \"nextmv==0.26.3\",\n",
+        "        \"nextmv==0.29.0\",\n",
         "        \"nextmv-gurobipy==0.3.0\",\n",
         "        \"plotly==6.0.0\"\n",
         "    ],\n",
diff --git a/python-wf-databricks-ml-gurobi-price-optimization/requirements.txt b/python-wf-databricks-ml-gurobi-price-optimization/requirements.txt
index 761b1097..b3e1b689 100644
--- a/python-wf-databricks-ml-gurobi-price-optimization/requirements.txt
+++ b/python-wf-databricks-ml-gurobi-price-optimization/requirements.txt
@@ -1,4 +1,4 @@
-nextmv==0.26.3
-nextpipe==0.1.3
+nextmv==0.29.0
+nextpipe==0.3.1
 pandas==2.2.3
 databricks-sdk
diff --git a/python-wf-databricks/README.md b/python-wf-databricks/README.md
index d7f67ad5..5f2602e0 100644
--- a/python-wf-databricks/README.md
+++ b/python-wf-databricks/README.md
@@ -11,8 +11,8 @@ capabilities.
 - Nextmv API key
 - Databricks workspace access (with DATABRICKS_HOST and DATABRICKS_TOKEN)
 - The following Python packages (specified in `requirements.txt`):
-  - nextmv==0.26.3
-  - nextpipe==0.1.3
+  - nextmv==0.29.0
+  - nextpipe==0.3.1
   - pandas==2.2.3
   - databricks-sdk
 
diff --git a/python-wf-databricks/hello-world-nextmv-app.ipynb b/python-wf-databricks/hello-world-nextmv-app.ipynb
index 7df00ab0..b1b50d69 100644
--- a/python-wf-databricks/hello-world-nextmv-app.ipynb
+++ b/python-wf-databricks/hello-world-nextmv-app.ipynb
@@ -656,7 +656,7 @@
         "\n",
         "model_configuration = nextmv.ModelConfiguration(\n",
         "    name=\"hello-world\",\n",
-        "    requirements=[\"nextmv==0.26.3\", \"plotly==6.0.0\"],\n",
+        "    requirements=[\"nextmv==0.29.0\", \"plotly==6.0.0\"],\n",
         "    options=options,\n",
         ")\n",
         "manifest = nextmv.cloud.Manifest.from_model_configuration(model_configuration)\n",
diff --git a/python-wf-databricks/requirements.txt b/python-wf-databricks/requirements.txt
index 761b1097..b3e1b689 100644
--- a/python-wf-databricks/requirements.txt
+++ b/python-wf-databricks/requirements.txt
@@ -1,4 +1,4 @@
-nextmv==0.26.3
-nextpipe==0.1.3
+nextmv==0.29.0
+nextpipe==0.3.1
 pandas==2.2.3
 databricks-sdk
diff --git a/python-wf-ortools-region-allocation/requirements.txt b/python-wf-ortools-region-allocation/requirements.txt
index bff59745..20a7da4b 100644
--- a/python-wf-ortools-region-allocation/requirements.txt
+++ b/python-wf-ortools-region-allocation/requirements.txt
@@ -1,5 +1,5 @@
-nextpipe==0.2.1
-nextmv==0.26.3
+nextpipe==0.3.1
+nextmv==0.29.0
 requests==2.32.4
 plotly==6.1.0
 pandas==2.2.3
diff --git a/python-xpress-knapsack/requirements.txt b/python-xpress-knapsack/requirements.txt
index 8d707eca..15338588 100644
--- a/python-xpress-knapsack/requirements.txt
+++ b/python-xpress-knapsack/requirements.txt
@@ -1,2 +1,2 @@
 xpress==9.4.2; platform_system != 'Darwin' or (platform_system == 'Darwin' and platform_machine != 'arm64')
-nextmv==0.26.3
+nextmv==0.29.0

From 7abd755189a65dd14be35481397f12ef66d9b7ef Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Tue, 8 Jul 2025 18:25:00 +0200
Subject: [PATCH 11/15] Bumping nextmv gurobipy

---
 python-gurobi-price-optimization/main.ipynb                     | 2 +-
 python-nextmv-gurobipy-knapsack/main.ipynb                      | 2 +-
 python-nextmv-gurobipy-knapsack/requirements.txt                | 2 +-
 .../avocado-price-optimizer.ipynb                               | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/python-gurobi-price-optimization/main.ipynb b/python-gurobi-price-optimization/main.ipynb
index 16047a84..fadeaa71 100644
--- a/python-gurobi-price-optimization/main.ipynb
+++ b/python-gurobi-price-optimization/main.ipynb
@@ -655,7 +655,7 @@
         "    name=\"avocado-price-optimizer\",\n",
         "    requirements=[\n",
         "        \"nextmv==0.29.0\",\n",
-        "        \"nextmv-gurobipy==0.3.0\",\n",
+        "        \"nextmv-gurobipy==0.4.1\",\n",
         "        \"plotly==6.0.0\"\n",
         "    ],\n",
         "    options=options,\n",
diff --git a/python-nextmv-gurobipy-knapsack/main.ipynb b/python-nextmv-gurobipy-knapsack/main.ipynb
index 269ac9be..a5ede59d 100644
--- a/python-nextmv-gurobipy-knapsack/main.ipynb
+++ b/python-nextmv-gurobipy-knapsack/main.ipynb
@@ -275,7 +275,7 @@
         "model_configuration = nextmv.ModelConfiguration(\n",
         "    name=\"gurobi_model\",\n",
         "    requirements=[\n",
-        "        \"nextmv-gurobipy==0.3.0\",\n",
+        "        \"nextmv-gurobipy==0.4.1\",\n",
         "    ],\n",
         "    options=options,\n",
         ")\n",
diff --git a/python-nextmv-gurobipy-knapsack/requirements.txt b/python-nextmv-gurobipy-knapsack/requirements.txt
index a3ad91f2..9fb5ebb9 100644
--- a/python-nextmv-gurobipy-knapsack/requirements.txt
+++ b/python-nextmv-gurobipy-knapsack/requirements.txt
@@ -1 +1 @@
-nextmv-gurobipy==0.3.0
+nextmv-gurobipy==0.4.1
diff --git a/python-wf-databricks-ml-gurobi-price-optimization/avocado-price-optimizer.ipynb b/python-wf-databricks-ml-gurobi-price-optimization/avocado-price-optimizer.ipynb
index 1b27f0b6..2b846e3f 100644
--- a/python-wf-databricks-ml-gurobi-price-optimization/avocado-price-optimizer.ipynb
+++ b/python-wf-databricks-ml-gurobi-price-optimization/avocado-price-optimizer.ipynb
@@ -475,7 +475,7 @@
         "    name=\"avocado-price-optimizer\",\n",
         "    requirements=[\n",
         "        \"nextmv==0.29.0\",\n",
-        "        \"nextmv-gurobipy==0.3.0\",\n",
+        "        \"nextmv-gurobipy==0.4.1\",\n",
         "        \"plotly==6.0.0\"\n",
         "    ],\n",
         "    options=options,\n",

From c47fb281e44f6f4ac98f9d0b57bf638d1e17d87d Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Tue, 8 Jul 2025 18:29:03 +0200
Subject: [PATCH 12/15] Adding missing dependencies

---
 python-ortools-multiknapsack-multiexcel/requirements.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/python-ortools-multiknapsack-multiexcel/requirements.txt b/python-ortools-multiknapsack-multiexcel/requirements.txt
index 273fe821..911835a8 100644
--- a/python-ortools-multiknapsack-multiexcel/requirements.txt
+++ b/python-ortools-multiknapsack-multiexcel/requirements.txt
@@ -1,2 +1,4 @@
 nextmv==0.29.0
 ortools==9.14.6206
+openpyxl==3.1.5
+pandas==2.3.1

From 5a7f6cf879c1c4069f717658aaaa7e134c573e53 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Wed, 9 Jul 2025 00:40:16 +0200
Subject: [PATCH 13/15] Showing stderr on readme tests too

---
 .nextmv/readme/main_test.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.nextmv/readme/main_test.go b/.nextmv/readme/main_test.go
index c1d918be..b294f623 100644
--- a/.nextmv/readme/main_test.go
+++ b/.nextmv/readme/main_test.go
@@ -129,6 +129,7 @@ func TestGolden(t *testing.T) {
 					testName,
 					golden.BashConfig{
 						DisplayStdout: !scriptConfig.Silent,
+						DisplayStderr: !scriptConfig.Silent,
 						WorkingDir:    "../../" + app,
 						OutputProcessConfig: golden.OutputProcessConfig{
 							VolatileRegexReplacements: replacements,

From 4fd4d5a221ef8a4de9b643a244bb0531d1502330 Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Wed, 9 Jul 2025 02:42:41 +0200
Subject: [PATCH 14/15] Allowing capture of stderr, updating expecations

---
 .nextmv/readme/main_test.go                   |  3 ++-
 .../readme/python-highs-knapsack/1.sh.golden  |  3 +++
 .../python-ortools-costflow/1.sh.golden       |  3 +++
 .../1.sh.golden                               |  2 ++
 .../python-ortools-knapsack/1.sh.golden       |  3 +++
 .../1.sh.golden                               |  5 ++++
 .../readme/python-ortools-routing/1.sh.golden |  3 +++
 .../1.sh.golden                               |  4 ++++
 .../python-ortools-shiftplanning/1.sh.golden  |  3 +++
 .../readme/python-pyomo-knapsack/1.sh.golden  |  3 +++
 .../python-pyomo-shiftassignment/1.sh.golden  |  4 ++++
 .../python-pyomo-shiftplanning/1.sh.golden    |  3 +++
 .../1.sh.golden                               |  3 +++
 .nextmv/readme/workflow-configuration.yml     | 24 +++++++++++++++++++
 14 files changed, 65 insertions(+), 1 deletion(-)

diff --git a/.nextmv/readme/main_test.go b/.nextmv/readme/main_test.go
index b294f623..74b9b957 100644
--- a/.nextmv/readme/main_test.go
+++ b/.nextmv/readme/main_test.go
@@ -28,6 +28,7 @@ const configFile = "workflow-configuration.yml"
 type ScriptConfig struct {
 	Name   string `yaml:"name"`
 	Silent bool   `yaml:"silent"`
+	StdErr bool   `yaml:"stderr"`
 	Skip   bool   `yaml:"skip"`
 }
 
@@ -129,7 +130,7 @@ func TestGolden(t *testing.T) {
 					testName,
 					golden.BashConfig{
 						DisplayStdout: !scriptConfig.Silent,
-						DisplayStderr: !scriptConfig.Silent,
+						DisplayStderr: scriptConfig.StdErr,
 						WorkingDir:    "../../" + app,
 						OutputProcessConfig: golden.OutputProcessConfig{
 							VolatileRegexReplacements: replacements,
diff --git a/.nextmv/readme/python-highs-knapsack/1.sh.golden b/.nextmv/readme/python-highs-knapsack/1.sh.golden
index e69de29b..5941d252 100644
--- a/.nextmv/readme/python-highs-knapsack/1.sh.golden
+++ b/.nextmv/readme/python-highs-knapsack/1.sh.golden
@@ -0,0 +1,3 @@
+Solving knapsack problem:
+  - items: 11
+  - capacity: 50
diff --git a/.nextmv/readme/python-ortools-costflow/1.sh.golden b/.nextmv/readme/python-ortools-costflow/1.sh.golden
index e69de29b..84392db4 100644
--- a/.nextmv/readme/python-ortools-costflow/1.sh.golden
+++ b/.nextmv/readme/python-ortools-costflow/1.sh.golden
@@ -0,0 +1,3 @@
+Best value flow for project to worker assignment:
+  - projects: 5
+  - workers: 3
diff --git a/.nextmv/readme/python-ortools-demandforecasting/1.sh.golden b/.nextmv/readme/python-ortools-demandforecasting/1.sh.golden
index e69de29b..4a044bfb 100644
--- a/.nextmv/readme/python-ortools-demandforecasting/1.sh.golden
+++ b/.nextmv/readme/python-ortools-demandforecasting/1.sh.golden
@@ -0,0 +1,2 @@
+Solving demand forecasting problem:
+  - demands: 7300
diff --git a/.nextmv/readme/python-ortools-knapsack/1.sh.golden b/.nextmv/readme/python-ortools-knapsack/1.sh.golden
index e69de29b..5941d252 100644
--- a/.nextmv/readme/python-ortools-knapsack/1.sh.golden
+++ b/.nextmv/readme/python-ortools-knapsack/1.sh.golden
@@ -0,0 +1,3 @@
+Solving knapsack problem:
+  - items: 11
+  - capacity: 50
diff --git a/.nextmv/readme/python-ortools-region-allocation/1.sh.golden b/.nextmv/readme/python-ortools-region-allocation/1.sh.golden
index e69de29b..09ccc52d 100644
--- a/.nextmv/readme/python-ortools-region-allocation/1.sh.golden
+++ b/.nextmv/readme/python-ortools-region-allocation/1.sh.golden
@@ -0,0 +1,5 @@
+Solving region allocation:
+  - regions: 189
+  - hubs: 6
+  - duration: 30 seconds
+  - provider: scip
diff --git a/.nextmv/readme/python-ortools-routing/1.sh.golden b/.nextmv/readme/python-ortools-routing/1.sh.golden
index e69de29b..8e18d346 100644
--- a/.nextmv/readme/python-ortools-routing/1.sh.golden
+++ b/.nextmv/readme/python-ortools-routing/1.sh.golden
@@ -0,0 +1,3 @@
+Solving routing problem:
+  - vehicles: 2
+  - stops: 10
diff --git a/.nextmv/readme/python-ortools-shiftassignment/1.sh.golden b/.nextmv/readme/python-ortools-shiftassignment/1.sh.golden
index e69de29b..fc59c22b 100644
--- a/.nextmv/readme/python-ortools-shiftassignment/1.sh.golden
+++ b/.nextmv/readme/python-ortools-shiftassignment/1.sh.golden
@@ -0,0 +1,4 @@
+Solving shift-assignment:
+  - shifts: 4
+  - workers: 5
+  - rules: 1
diff --git a/.nextmv/readme/python-ortools-shiftplanning/1.sh.golden b/.nextmv/readme/python-ortools-shiftplanning/1.sh.golden
index e69de29b..86fdcd38 100644
--- a/.nextmv/readme/python-ortools-shiftplanning/1.sh.golden
+++ b/.nextmv/readme/python-ortools-shiftplanning/1.sh.golden
@@ -0,0 +1,3 @@
+Solving shift-planning:
+  - shifts-templates: 2
+  - demands: 3
diff --git a/.nextmv/readme/python-pyomo-knapsack/1.sh.golden b/.nextmv/readme/python-pyomo-knapsack/1.sh.golden
index e69de29b..5941d252 100644
--- a/.nextmv/readme/python-pyomo-knapsack/1.sh.golden
+++ b/.nextmv/readme/python-pyomo-knapsack/1.sh.golden
@@ -0,0 +1,3 @@
+Solving knapsack problem:
+  - items: 11
+  - capacity: 50
diff --git a/.nextmv/readme/python-pyomo-shiftassignment/1.sh.golden b/.nextmv/readme/python-pyomo-shiftassignment/1.sh.golden
index e69de29b..fc59c22b 100644
--- a/.nextmv/readme/python-pyomo-shiftassignment/1.sh.golden
+++ b/.nextmv/readme/python-pyomo-shiftassignment/1.sh.golden
@@ -0,0 +1,4 @@
+Solving shift-assignment:
+  - shifts: 4
+  - workers: 5
+  - rules: 1
diff --git a/.nextmv/readme/python-pyomo-shiftplanning/1.sh.golden b/.nextmv/readme/python-pyomo-shiftplanning/1.sh.golden
index e69de29b..86fdcd38 100644
--- a/.nextmv/readme/python-pyomo-shiftplanning/1.sh.golden
+++ b/.nextmv/readme/python-pyomo-shiftplanning/1.sh.golden
@@ -0,0 +1,3 @@
+Solving shift-planning:
+  - shifts-templates: 2
+  - demands: 3
diff --git a/.nextmv/readme/python-pyoptinterface-knapsack/1.sh.golden b/.nextmv/readme/python-pyoptinterface-knapsack/1.sh.golden
index e69de29b..5941d252 100644
--- a/.nextmv/readme/python-pyoptinterface-knapsack/1.sh.golden
+++ b/.nextmv/readme/python-pyoptinterface-knapsack/1.sh.golden
@@ -0,0 +1,3 @@
+Solving knapsack problem:
+  - items: 11
+  - capacity: 50
diff --git a/.nextmv/readme/workflow-configuration.yml b/.nextmv/readme/workflow-configuration.yml
index a1a60eca..00cecfbb 100644
--- a/.nextmv/readme/workflow-configuration.yml
+++ b/.nextmv/readme/workflow-configuration.yml
@@ -136,6 +136,8 @@ apps:
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-nextmv-gurobipy-knapsack
@@ -154,18 +156,24 @@ apps:
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-ortools-demandforecasting
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-ortools-knapsack
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-ortools-knapsack-multicsv
@@ -184,48 +192,64 @@ apps:
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-ortools-routing
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-ortools-shiftassignment
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-ortools-shiftplanning
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-pyomo-knapsack
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-pyomo-shiftassignment
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-pyomo-shiftplanning
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-pyoptinterface-knapsack
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
       - name: 2.sh
         skip: true
   - name: python-pyvroom-routing

From 25f63a9a6d726f33a9ca7356728e8e0a52bc22be Mon Sep 17 00:00:00 2001
From: Marius Merschformann <marius.merschformann@gmail.com>
Date: Wed, 9 Jul 2025 02:57:10 +0200
Subject: [PATCH 15/15] Enabling stderr capture on ortools multi expectation

---
 .nextmv/readme/workflow-configuration.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.nextmv/readme/workflow-configuration.yml b/.nextmv/readme/workflow-configuration.yml
index 00cecfbb..d739455d 100644
--- a/.nextmv/readme/workflow-configuration.yml
+++ b/.nextmv/readme/workflow-configuration.yml
@@ -188,6 +188,8 @@ apps:
     scripts:
       - name: 0.sh
         silent: true
+      - name: 1.sh
+        stderr: true
   - name: python-ortools-region-allocation
     scripts:
       - name: 0.sh