diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index a9b831f..7158315 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -6,8 +6,21 @@ on:
 
 jobs:
   tests:
-    name: Run Pytest
-    runs-on: ubuntu-latest
+    name: ${{ matrix.os }} / ${{ matrix.versions }} versions
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        versions: [latest, floor]
+        include:
+          # the ranges in isschecker_env.yml, solved fresh
+          - versions: latest
+            environment-file: isschecker_env.yml
+          # every floor in isschecker_env.yml pinned exactly
+          - versions: floor
+            environment-file: ci/isschecker_env_floor.yml
 
     steps:
       - name: Check out repository
@@ -16,13 +29,38 @@ jobs:
       - name: Set up micromamba environment
         uses: mamba-org/setup-micromamba@v2
         with:
-          environment-file: isschecker_env.yml
+          environment-file: ${{ matrix.environment-file }}
           environment-name: isschecker
-          cache-environment: true
+          # Caching a solved environment would hide the day a new release
+          # breaks the open end of a range, so only the floor -- which is
+          # pinned, and so cannot drift -- is cached.
+          cache-environment: ${{ matrix.versions == 'floor' }}
           cache-downloads: true
           init-shell: >-
             bash
 
+      - name: Install isschecker
+        shell: micromamba-shell {0}
+        # The same flags the README gives modelers, so CI exercises the
+        # documented install rather than a different one.
+        run: python -m pip install --no-deps --no-build-isolation .
+
+      - name: Report the installed versions
+        shell: micromamba-shell {0}
+        run: micromamba list
+
+      - name: Check the entry points
+        shell: micromamba-shell {0}
+        working-directory: ${{ runner.temp }}
+        run: |
+          ismip7-compliance-checker --version
+          python -m isschecker --version
+          ismip7-generate-test-files --list-grids
+
       - name: Run test suite
         shell: micromamba-shell {0}
-        run: pytest -v tests/test_compliance_checker.py
\ No newline at end of file
+        # Run from outside the checkout so the tests import the installed
+        # package: a data file or entry point that did not make it into the
+        # wheel then fails here instead of passing against the source tree.
+        working-directory: ${{ runner.temp }}
+        run: pytest -v "$GITHUB_WORKSPACE/tests/test_compliance_checker.py"
diff --git a/.gitignore b/.gitignore
index 375de91..2c62f44 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,7 @@
 __pycache__
 .pytest_cache
+build/
+dist/
+*.egg-info/
+*.whl
+.venv/
diff --git a/README.md b/README.md
index f8aa5f2..bca08fe 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Checks ISMIP7 NetCDF simulation datasets for compliance with the [ISMIP7 data re
 4. **Time** — time dimension is present, unlimited, and monotonically increasing; annual cadence for `x,y,t` and `t` variables; sparse snapshot timestamps for `x,y,z,t` variables (see [Time encoding](#time-encoding)); experiment start/end dates and duration match `experiments_ismip7.csv` for `x,y,t` and `t` variables.
 5. **Attributes** — required global and coordinate attributes are present and have correct values; `standard_name` matches data request; `_FillValue` equals the NetCDF4 default for the variable's dtype; variable and time are float32; `scale_factor` and `add_offset` are not allowed.
 
-Compliance criteria are defined in `conventions/ISMIP7_variable_request.csv` (variable metadata) and `experiments_ismip7.csv` (valid experiment year ranges and durations).
+Compliance criteria are defined in `isschecker/data/ISMIP7_variable_request.csv` (variable metadata) and `isschecker/data/experiments_ismip7.csv` (valid experiment year ranges and durations). Together with the grid definitions in `isschecker/data/gdfs/`, these files are bundled with the package.
 
 ---
 
@@ -44,34 +44,66 @@ Reference lookup tables are available in the companion repository [`ismip7-time-
 
 ## Setup
 
+Create the conda environment and install the package:
+
 ```bash
 conda env create -f isschecker_env.yml
 conda activate isschecker
+python -m pip install --no-deps --no-build-isolation .
+```
+
+Installing the package registers the `ismip7-compliance-checker` command and bundles the data files, so the checker can be run from any directory.
+
+**Use those pip flags.** All dependencies come from conda-forge, and a plain `pip install .` can silently replace them with PyPI wheels — `netCDF4` in particular bundles its own copy of the netCDF C library — which is exactly how two people end up with different results from the same files. `--no-deps` keeps pip from resolving anything, and `--no-build-isolation` builds with the environment's `setuptools` instead of downloading one from PyPI. Add `--no-index` if you want any accidental network fetch to fail loudly rather than succeed quietly.
+
+For development, add `-e` for an editable install:
+
+```bash
+python -m pip install --no-deps --no-build-isolation -e .
 ```
 
-Dependencies: Python 3.14, `numpy` 2.4, `pandas` 3.0, `xarray` 2026.4, `cftime` 1.6, `netCDF4` 1.7, `tqdm` 4.67.
+(`pytest` comes from the conda environment, so the `[test]` extra is not needed.) An editable install is worth having while developing, because the tests import the installed package: after a non-editable install, edits to the source tree do not affect a test run until you reinstall.
+
+If a rebuild ever behaves as though it were still running older code, delete the `build/` directory: `setuptools` reuses its contents, so files that have since been renamed or removed can otherwise end up back in the installed package.
+
+### Dependencies
+
+Versions are constrained in `isschecker_env.yml`; the same constraints appear in `pyproject.toml`. The suite is tested at both ends of every range, so results should agree across machines and operating systems within these bounds.
+
+| Package | Constraint | Why bounded |
+|---|---|---|
+| `python` | `>=3.11,<3.15` | `str \| None` annotations need ≥3.10; 3.10 is EOL in Oct 2026 |
+| `numpy` | `>=2.1,<3` | what recent `pandas`/`xarray` are built against |
+| `pandas` | `>=2.2,<4` | reads the criteria CSVs; 3.0 changed the default string dtype |
+| `xarray` | `>=2025.1.2,<2027` | `xarray.coders.CFDatetimeCoder` (public API in 2025.1.1) and non-nanosecond datetime decoding, both used by the time checks |
+| `cftime` | `>=1.6.4,<2` | date arithmetic in the start/end/duration checks |
+| `netCDF4` | `>=1.7,<2` | `_FillValue` checks compare against `netCDF4.default_fillvals` |
+| `tqdm` | `>=4.66` | progress bar only; never affects the log |
+
+If you report a problem with the checker, please include the output of `conda list` for your `isschecker` environment.
 
 ---
 
 ## Running the checker
 
-The script must be run from the repository root. It writes `compliance_checker_log.txt` into the `--source-path` directory.
+Once installed, run the checker from any directory with the `ismip7-compliance-checker` command (equivalently, `python -m isschecker`). It writes `compliance_checker_log.txt` into the `--source-path` directory.
 
 ```bash
 # Check x,y,t (3D spatial) variables
-python compliance_checker.py --source-path ./Models/GrIS/ISMIP7/SYNTH1/CORE/C001 --variable-list ismip7_xyt
+ismip7-compliance-checker --source-path ./Models/GrIS/ISMIP7/SYNTH1/CORE/C001 --variable-list ismip7_xyt
 
 # Check scalar (time-only) variables
-python compliance_checker.py --source-path ./Models/AIS/ISMIP7/SYNTH1/CORE/C001 --variable-list ismip7_scalars
+ismip7-compliance-checker --source-path ./Models/AIS/ISMIP7/SYNTH1/CORE/C001 --variable-list ismip7_scalars
 
 # Check both
-python compliance_checker.py --source-path ./Models/GrIS/ISMIP7/SYNTH1/CORE/C001 --variable-list ismip7
+ismip7-compliance-checker --source-path ./Models/GrIS/ISMIP7/SYNTH1/CORE/C001 --variable-list ismip7
 ```
 
 | Option | Default | Description |
 |--------|---------|-------------|
 | `--source-path` | `./Models/GrIS/ISMIP7/SYNTH1/CORE/C001` | Set-counter subdirectory containing `.nc` files to check |
 | `--variable-list` | `ismip7_scalars` | `ismip7_xyt`, `ismip7_scalars`, or `ismip7` (both) |
+| `--version` | — | Print the installed version and exit; quote it when reporting a problem |
 
 `experiments_ismip7.csv` defines the allowed nominal year ranges and durations for each experiment. The checker derives the expected FL and ST timestamps from these year values at runtime (see [Time encoding](#time-encoding)).
 
@@ -79,26 +111,26 @@ python compliance_checker.py --source-path ./Models/GrIS/ISMIP7/SYNTH1/CORE/C001
 
 ## Generating synthetic test files
 
-`generate/generate_test_files.py` creates ISMIP7-style NetCDF test files with synthetic data. See [generate/README.md](generate/README.md) for full options and examples.
+The `ismip7-generate-test-files` command creates ISMIP7-style NetCDF test files with synthetic data, under `Models/` in the current directory. See [docs/generating_test_files.md](docs/generating_test_files.md) for full options and examples.
 
 ```bash
 conda activate isschecker
 
 # Generate 286-year GrIS ctrl xyt variables
-python generate/generate_test_files.py --grid GrIS_16000m --scenario ctrl --xyt --nyears 286 --start-year 2015
+ismip7-generate-test-files --grid GrIS_16000m --scenario ctrl --xyt --nyears 286 --start-year 2015
 
 # Generate 286-year AIS ctrl scalar variables
-python generate/generate_test_files.py --grid AIS_16000m --scenario ctrl --scalars --nyears 286 --start-year 2015
+ismip7-generate-test-files --grid AIS_16000m --scenario ctrl --scalars --nyears 286 --start-year 2015
 
 # List available grids
-python generate/generate_test_files.py --list-grids
+ismip7-generate-test-files --list-grids
 ```
 
 ---
 
 ## Running Tests
 
-The regression suite uses `pytest` and creates temporary synthetic datasets, then mutates them to verify expected checker failures for naming, missing variables, time-axis problems, and missing attributes.
+The regression suite uses `pytest` and creates temporary synthetic datasets, then mutates them to verify expected checker failures for naming, missing variables, time-axis problems, and missing attributes. It imports `isschecker`, so install the package first (see [Setup](#setup)); the tests then exercise what is actually installed and can be run from any directory.
 
 ```bash
 pytest -v tests/test_compliance_checker.py
@@ -109,3 +141,13 @@ If you want to retain the files generated during testing you can use:
 pytest -v tests/test_compliance_checker.py --basetemp=/tmp/pytest_tmp
 ```
 The files will then be left in `/tmp/pytest_tmp`.  Otherwise, they are cleaned up once tests pass.
+
+### The reference log
+
+`tests/test_golden_log.py` runs the checker over a fixed, seeded dataset and compares the resulting log line by line against `tests/reference/compliance_checker_log.txt`, with the version, date, and source path masked out. It is what turns "results should agree across machines" into something CI can check: any difference in log text fails the test, whether it comes from a change of ours or from a dependency release inside the supported version ranges.
+
+When a change to the checker is *meant* to change the log, read the diff the failure prints, then regenerate the reference and commit it alongside the change:
+
+```bash
+ISSCHECKER_UPDATE_GOLDEN_LOG=1 pytest tests/test_golden_log.py
+```
diff --git a/ci/isschecker_env_floor.yml b/ci/isschecker_env_floor.yml
new file mode 100644
index 0000000..d160d47
--- /dev/null
+++ b/ci/isschecker_env_floor.yml
@@ -0,0 +1,26 @@
+# The oldest dependency versions the checker supports: every floor in
+# isschecker_env.yml pinned exactly.  CI runs the test suite against this
+# environment as well as the latest solve, so both ends of every range in
+# isschecker_env.yml are actually verified rather than assumed.
+#
+# Keep this file in step with isschecker_env.yml: when a floor moves there, move
+# it here too.
+name: isschecker
+channels:
+  - conda-forge
+  - nodefaults
+
+dependencies:
+  - python =3.11
+  - pip
+  - setuptools >=77
+
+  - numpy =2.1
+  - pandas =2.2
+  - tqdm =4.66
+
+  - xarray =2025.1.2
+  - cftime =1.6.4
+  - netcdf4 =1.7
+
+  - pytest =8
diff --git a/generate/README.md b/docs/generating_test_files.md
similarity index 66%
rename from generate/README.md
rename to docs/generating_test_files.md
index ea7b15b..3b5679d 100644
--- a/generate/README.md
+++ b/docs/generating_test_files.md
@@ -1,14 +1,14 @@
 # ISMIP7 NetCDF generator
 
-`generate/generate_test_files.py` creates ISMIP7-style NetCDF test files with synthetic data, one file per variable, following the naming convention and grid definitions used by the compliance checker.
+`ismip7-generate-test-files` creates ISMIP7-style NetCDF test files with synthetic data, one file per variable, following the naming convention and grid definitions used by the compliance checker. It is part of the `isschecker` package (`isschecker.generate`), so it is installed along with the checker and can be run from any directory.
 
-Files are written to `Models/{GrIS|AIS}/ISMIP7/SYNTH1/CORE/{set_counter}/` (default `C001`).
+Files are written to `Models/{GrIS|AIS}/ISMIP7/SYNTH1/CORE/{set_counter}/` (default `C001`) beneath the current working directory.
 
 ## Usage
 
 ```bash
 conda activate isschecker
-python generate/generate_test_files.py [OPTIONS]
+ismip7-generate-test-files [OPTIONS]
 ```
 
 ## Key options
@@ -26,38 +26,39 @@ python generate/generate_test_files.py [OPTIONS]
 | `--esm-id` | `CESM2-WACCM` | ESM id (written into filenames) |
 | `--forcing-member-id` | `f001` | Forcing ensemble member id (written into filenames) |
 | `--set-counter` | `C001` | Set counter id (written into filenames) |
+| `--seed` | `0` | Seed for the synthetic data; the same seed always produces the same values |
 | `--list-grids` | — | List all available grids and exit |
 
 ## Examples
 
 ```bash
 # List available grids
-python generate/generate_test_files.py --list-grids
+ismip7-generate-test-files --list-grids
 
 # Generate 286-year GrIS ctrl files (x,y,t variables)
-python generate/generate_test_files.py --grid GrIS_16000m --scenario ctrl \
+ismip7-generate-test-files --grid GrIS_16000m --scenario ctrl \
   --xyt --nyears 286 --start-year 2015
 
 # Generate 286-year AIS ssp370 files
-python generate/generate_test_files.py --grid AIS_08000m --scenario ssp370 \
+ismip7-generate-test-files --grid AIS_08000m --scenario ssp370 \
   --xyt --nyears 286 --start-year 2015
 
 # Generate scalar-only variables
-python generate/generate_test_files.py --grid GrIS_16000m --scenario ctrl \
+ismip7-generate-test-files --grid GrIS_16000m --scenario ctrl \
   --scalars --nyears 286 --start-year 2015
 
 # Generate both 3D and scalar variables, including non-mandatory ones
-python generate/generate_test_files.py --grid GrIS_16000m --scenario ctrl \
+ismip7-generate-test-files --grid GrIS_16000m --scenario ctrl \
   --xyt --scalars --include-non-mandatory --nyears 286 --start-year 2015
 
 # Generate testdata for ismip7-scalar-processing
-python generate/generate_test_files.py --grid AIS_16000m --scenario historical \
+ismip7-generate-test-files --grid AIS_16000m --scenario historical \
   --set-counter C001 --xyt --include-non-mandatory --nyears 1  --start-year 2014 
-python generate/generate_test_files.py --grid AIS_16000m --scenario ssp585 \
+ismip7-generate-test-files --grid AIS_16000m --scenario ssp585 \
   --set-counter C007 --xyt --include-non-mandatory --nyears 286 --start-year 2015
-python generate/generate_test_files.py --grid GrIS_16000m --scenario historical \
+ismip7-generate-test-files --grid GrIS_16000m --scenario historical \
   --set-counter C001 --xyt --include-non-mandatory --nyears 55  --start-year 1960
-python generate/generate_test_files.py --grid GrIS_16000m --scenario ctrl \
+ismip7-generate-test-files --grid GrIS_16000m --scenario ctrl \
   --set-counter C009 --xyt --include-non-mandatory --nyears 286 --start-year 2015
 ```
 
@@ -76,6 +77,7 @@ python generate/generate_test_files.py --grid GrIS_16000m --scenario ctrl \
 
 ## Notes
 
-- Variable metadata is read from `conventions/ISMIP7_variable_request.csv`; grid definitions from the top-level `gdfs/` directory.
+- Variable metadata is read from `ISMIP7_variable_request.csv` and grid definitions from `gdfs/`, both bundled as package data in `isschecker/data/`. Use `--conventions-dir` to point at a different directory (it must contain the CSV and a `gdfs/` subdirectory).
 - `group`, `model`, `contact_name`, and `contact_email` are hardcoded in `create_netcdf_file()` to synthetic defaults — edit there to customise.
 - Generated files are synthetic and intended for testing the compliance checker, not for scientific use.
+- Data values are drawn from a seeded generator, so a given `--seed` reproduces the same files. With `--multiple`, each file uses `seed + i` so the files differ from one another while the run as a whole stays reproducible.
diff --git a/isschecker/__init__.py b/isschecker/__init__.py
new file mode 100644
index 0000000..5088a5e
--- /dev/null
+++ b/isschecker/__init__.py
@@ -0,0 +1,5 @@
+"""ISMIP7 compliance checker for ice sheet model simulation NetCDF datasets."""
+
+from isschecker.checker import __version__, main, run_checker
+
+__all__ = ["__version__", "main", "run_checker"]
diff --git a/isschecker/__main__.py b/isschecker/__main__.py
new file mode 100644
index 0000000..10b1b5b
--- /dev/null
+++ b/isschecker/__main__.py
@@ -0,0 +1,6 @@
+"""Entry point for ``python -m isschecker``."""
+
+from isschecker import main
+
+if __name__ == "__main__":
+    main()
diff --git a/compliance_checker.py b/isschecker/checker.py
old mode 100755
new mode 100644
similarity index 95%
rename from compliance_checker.py
rename to isschecker/checker.py
index 44a149c..ece0a73
--- a/compliance_checker.py
+++ b/isschecker/checker.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 #
 # ISMIP7 Compliance Checker — check summary
 #
@@ -42,6 +41,7 @@
 import re
 import subprocess
 import argparse
+from importlib import metadata, resources
 
 import numpy as np
 import pandas as pd
@@ -50,14 +50,30 @@
 from tqdm import tqdm
 
 
+try:
+    __version__ = metadata.version("isschecker")
+except metadata.PackageNotFoundError:
+    # Running from a source tree that has not been installed.
+    __version__ = "unknown"
+
 DEFAULT_SOURCE_PATH = "./Models/GrIS/ISMIP7/SYNTH1/CORE/C001"
 DEFAULT_VARIABLE_LIST = "ismip7_scalars"
 VARIABLE_LIST_CHOICES = ("ismip7_scalars", "ismip7_xyt", "ismip7")
 
-VARIABLE_REQUEST_CSV = os.path.join("conventions", "ISMIP7_variable_request.csv")
+VARIABLE_REQUEST_CSV = "ISMIP7_variable_request.csv"
 
 EXPERIMENTS_ISMIP7_CSV_FILENAME = "experiments_ismip7.csv"
 
+
+DATA_PACKAGE = f"{__package__}.data"
+
+
+def _read_data_csv(filename: str, **kwargs) -> pd.DataFrame:
+    """Read a CSV bundled as package data in :data:`DATA_PACKAGE`."""
+    resource = resources.files(DATA_PACKAGE).joinpath(filename)
+    with resources.as_file(resource) as path:
+        return pd.read_csv(path, **kwargs)
+
 AIS_GRID_EXTENT = [-3040000, -3040000, 3040000, 3040000]
 GrIS_GRID_EXTENT = [-720000, -3450000, 960000, -570000]
 AIS_POSSIBLE_RESOLUTION = [2, 4, 8, 16, 32]
@@ -138,26 +154,21 @@ def main() -> None:
     run_checker(
         source_path=source_path,
         variable_list=variable_list,
-        workdir=os.getcwd(),
     )
 
 
 def run_checker(
     source_path: str,
     variable_list: str = DEFAULT_VARIABLE_LIST,
-    workdir: str | None = None,
-    commit_num: str | None = None,
+    version: str | None = None,
 ):
-    workdir = os.path.abspath(workdir or os.getcwd())
-    commit_num = _get_commit_number() if commit_num is None else commit_num
-    experiments_ismip7 = _load_experiments_csv(
-        os.path.join(workdir, EXPERIMENTS_ISMIP7_CSV_FILENAME)
-    )
-    ismip_meta, ismip_var, mandatory_variables = _load_criteria(workdir, variable_list)
+    version = _describe_version() if version is None else version
+    experiments_ismip7 = _load_experiments_csv()
+    ismip_meta, ismip_var, mandatory_variables = _load_criteria(variable_list)
 
     summary = _run_compliance_checker(
         source_path=source_path,
-        commit_num=commit_num,
+        version=version,
         ismip_meta=ismip_meta,
         ismip_var=ismip_var,
         mandatory_variables=mandatory_variables,
@@ -176,21 +187,50 @@ def run_checker(
     return summary
 
 
-def _get_commit_number() -> str:
+def _describe_version() -> str:
+    """Describe which checker produced a log.
+
+    The installed version, plus the git commit when the package is being run
+    from a checkout (a source or editable install).
+    """
+    commit = _git_commit()
+    return __version__ if commit is None else f"{__version__} (git {commit})"
+
+
+def _git_commit() -> str | None:
+    """Return the short git commit of the checkout this module lives in.
+
+    Deliberately keyed to the location of this file rather than the working
+    directory: the log records which checker ran, not which repository the user
+    happened to be standing in.  Returns None for a non-editable install, where
+    there is no checkout to describe.
+    """
+    package_dir = os.path.dirname(os.path.abspath(__file__))
     try:
-        bash_command = "git log --pretty=format:'%h' -n 1"
-        process = subprocess.Popen(bash_command.split(), stdout=subprocess.PIPE)
-        commit_num, _error = process.communicate()
-        return commit_num.decode("UTF-8")
-    except Exception:
-        print("Could not retrieve git commit number. Is there a .git directory here?")
-        return "No commit number identified."
+        process = subprocess.run(
+            ["git", "-C", package_dir, "log", "--pretty=format:%h", "-n", "1"],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+    except OSError:
+        # git is not installed
+        return None
+    if process.returncode != 0:
+        return None
+    return process.stdout.strip() or None
 
 
 def _parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(
         description="Check simulation NetCDF datasets for ISMIP compliance."
     )
+    parser.add_argument(
+        "--version",
+        action="version",
+        version=f"%(prog)s {__version__}",
+        help="Show the installed isschecker version and exit.",
+    )
     parser.add_argument(
         "--source-path",
         default=DEFAULT_SOURCE_PATH,
@@ -205,14 +245,14 @@ def _parse_args() -> argparse.Namespace:
     return parser.parse_args()
 
 
-def _load_criteria(workdir: str, variable_list: str):
-    csv_path = os.path.join(workdir, VARIABLE_REQUEST_CSV)
+def _load_criteria(variable_list: str):
     try:
-        df = pd.read_csv(csv_path)
-    except IOError:
+        df = _read_data_csv(VARIABLE_REQUEST_CSV)
+    except (IOError, ModuleNotFoundError):
         print(
-            "ERROR: Unable to open the variable request file. Is the path correct? "
-            + csv_path
+            "ERROR: Unable to open the variable request file "
+            + VARIABLE_REQUEST_CSV
+            + f" bundled in {DATA_PACKAGE}. Is the package installed correctly?"
         )
         raise
 
@@ -248,9 +288,9 @@ def _load_criteria(workdir: str, variable_list: str):
     return ismip_meta, ismip_var, ismip_mandatory_var
 
 
-def _load_experiments_csv(file_path: str):
+def _load_experiments_csv(filename: str = EXPERIMENTS_ISMIP7_CSV_FILENAME):
     experiments = []
-    frame = pd.read_csv(file_path, delimiter=";")
+    frame = _read_data_csv(filename, delimiter=";")
     for _, row in frame.iterrows():
         experiments.append(
             {
@@ -277,7 +317,7 @@ def _nominal_to_timestamp(year: int, var_type: str) -> datetime.datetime:
 
 def _run_compliance_checker(
     source_path: str,
-    commit_num: str,
+    version: str,
     ismip_meta,
     ismip_var,
     mandatory_variables,
@@ -293,7 +333,7 @@ def _run_compliance_checker(
             print("-> Checking " + source_path)
             print()
             today = datetime.date.today()
-            _write_log_header(f, commit_num, source_path, today, criteria_file)
+            _write_log_header(f, version, source_path, today, criteria_file)
 
             experiment_groups = _group_files_by_experiment(source_path)
             if not experiment_groups:
@@ -1425,7 +1465,7 @@ def _strictly_increasing(values) -> bool:
 
 
 def _write_log_header(
-        log_file, commit_num: str, source_path: str, today: datetime.date, criteria_file: str,
+        log_file, version: str, source_path: str, today: datetime.date, criteria_file: str,
 ) -> None:
     log_file.write(
         "************************************************************************************\n"
@@ -1436,7 +1476,7 @@ def _write_log_header(
     log_file.write(
         "************************************************************************************\n"
     )
-    log_file.write(f"Commit Number: {commit_num} \n")
+    log_file.write(f"isschecker version: {version} \n")
     log_file.write("verification criteria: " + criteria_file + "\n")
     log_file.write("date: " + today.strftime("%Y/%m/%d") + "\n")
     log_file.write("source: https://github.com/ismip/ISM_SimulationChecker \n")
@@ -1511,7 +1551,3 @@ def _insert_synthesis(
 
     with open(os.path.join(source_path, "compliance_checker_log.txt"), "w") as f:
         f.writelines(contents)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/conventions/ISMIP7_variable_request.csv b/isschecker/data/ISMIP7_variable_request.csv
similarity index 100%
rename from conventions/ISMIP7_variable_request.csv
rename to isschecker/data/ISMIP7_variable_request.csv
diff --git a/isschecker/data/__init__.py b/isschecker/data/__init__.py
new file mode 100644
index 0000000..18645a0
--- /dev/null
+++ b/isschecker/data/__init__.py
@@ -0,0 +1,6 @@
+"""Compliance criteria shipped with the checker.
+
+This module exists so that the directory is a regular package rather than a
+namespace package: ``importlib.resources.files()`` then resolves it to a single
+concrete directory instead of a ``MultiplexedPath``.
+"""
diff --git a/experiments_ismip7.csv b/isschecker/data/experiments_ismip7.csv
similarity index 100%
rename from experiments_ismip7.csv
rename to isschecker/data/experiments_ismip7.csv
diff --git a/gdfs/gdf_ISMIP7_AIS_02000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_AIS_02000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_AIS_02000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_AIS_02000m.txt
diff --git a/gdfs/gdf_ISMIP7_AIS_04000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_AIS_04000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_AIS_04000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_AIS_04000m.txt
diff --git a/gdfs/gdf_ISMIP7_AIS_08000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_AIS_08000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_AIS_08000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_AIS_08000m.txt
diff --git a/gdfs/gdf_ISMIP7_AIS_16000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_AIS_16000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_AIS_16000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_AIS_16000m.txt
diff --git a/gdfs/gdf_ISMIP7_AIS_32000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_AIS_32000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_AIS_32000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_AIS_32000m.txt
diff --git a/gdfs/gdf_ISMIP7_GrIS_01000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_GrIS_01000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_GrIS_01000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_GrIS_01000m.txt
diff --git a/gdfs/gdf_ISMIP7_GrIS_02000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_GrIS_02000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_GrIS_02000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_GrIS_02000m.txt
diff --git a/gdfs/gdf_ISMIP7_GrIS_04000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_GrIS_04000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_GrIS_04000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_GrIS_04000m.txt
diff --git a/gdfs/gdf_ISMIP7_GrIS_05000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_GrIS_05000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_GrIS_05000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_GrIS_05000m.txt
diff --git a/gdfs/gdf_ISMIP7_GrIS_08000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_GrIS_08000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_GrIS_08000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_GrIS_08000m.txt
diff --git a/gdfs/gdf_ISMIP7_GrIS_16000m.txt b/isschecker/data/gdfs/gdf_ISMIP7_GrIS_16000m.txt
similarity index 100%
rename from gdfs/gdf_ISMIP7_GrIS_16000m.txt
rename to isschecker/data/gdfs/gdf_ISMIP7_GrIS_16000m.txt
diff --git a/generate/generate_test_files.py b/isschecker/generate.py
similarity index 92%
rename from generate/generate_test_files.py
rename to isschecker/generate.py
index f05f1f8..058a360 100644
--- a/generate/generate_test_files.py
+++ b/isschecker/generate.py
@@ -1,34 +1,54 @@
-#!/usr/bin/env python3
 """
 NetCDF file generator for ISMIP7 ice sheet simulation data.
 
-This script generates NetCDF files with variables and metadata following
-ISMIP7 conventions as defined in the criteria CSV files and grid definitions.
+Generates NetCDF files with variables and metadata following ISMIP7
+conventions as defined in the criteria CSV files and grid definitions, both of
+which ship as package data alongside the checker.
 """
+import argparse
 import re
+from importlib import resources
 import numpy as np
 import xarray as xr
 from datetime import datetime
 from pathlib import Path
 import netCDF4
 
+DATA_PACKAGE = f'{__package__}.data'
 
-def get_available_grids(conventions_dir):
+# Synthetic data is drawn from a seeded generator so that a given seed always
+# produces the same files: reproducible test data, and no test that can drift
+# across a numerical bound from one run to the next.
+DEFAULT_SEED = 0
+
+
+def data_dir() -> Path:
+    """Return the bundled directory of criteria CSVs and `gdfs` grid definitions.
+
+    The package is always installed as a directory rather than a zip, so the
+    resource is a real path on disk.
+    """
+    return Path(str(resources.files(DATA_PACKAGE)))
+
+
+def get_available_grids(conventions_dir=None):
     """
-    Get available grid definitions from gdfs directory.
+    Get available grid definitions from the `gdfs` directory.
 
     Parameters
     ----------
-    conventions_dir : str
-        Path to conventions directory
+    conventions_dir : str, optional
+        Path to conventions directory (default: the bundled package data)
 
     Returns
     -------
     dict
         Dictionary with grid info: {'GrIS': [...], 'AIS': [...]}
     """
-    # Grid definitions moved to project root `gdfs` directory
-    gdf_dir = Path(conventions_dir).parent / 'gdfs'
+    if conventions_dir is None:
+        conventions_dir = data_dir()
+    gdf_dir = Path(conventions_dir) / 'gdfs'
+
     grids = {'GrIS': [], 'AIS': []}
 
     if not gdf_dir.exists():
@@ -159,7 +179,8 @@ def read_variable_criteria(csv_file, include_non_mandatory=False):
     return variables
 
 
-def generate_synthetic_data(shape, min_val, max_val, dtype=np.float32, eps=1e-6):
+def generate_synthetic_data(shape, min_val, max_val, dtype=np.float32, eps=1e-6,
+                            rng=None):
     """
     Generate synthetic data within specified range.
 
@@ -176,21 +197,27 @@ def generate_synthetic_data(shape, min_val, max_val, dtype=np.float32, eps=1e-6)
     eps : float, optional
         A small fraction by which `min_val` and `max_val` move toward one another to avoid
         synthetic data that violates numerical checks because of roundoff.
+    rng : np.random.Generator, optional
+        Random number generator to draw from (default: a fresh generator seeded
+        with `DEFAULT_SEED`)
 
     Returns
     -------
     np.ndarray
         Random data within the specified range
     """
+    if rng is None:
+        rng = np.random.default_rng(DEFAULT_SEED)
     delta = eps * (max_val - min_val)
-    data = np.random.uniform(min_val + delta, max_val - delta, shape).astype(dtype)
+    data = rng.uniform(min_val + delta, max_val - delta, shape).astype(dtype)
     return data
 
 
 def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', start_year=2015, nyears=5,
                        conventions_dir=None, include_non_mandatory=False, include_scalars=False,
                        include_xyt=False, output_root=None, nz=5,
-                       ism_member_id='m001', esm_id='CESM2-WACCM', forcing_member_id='f001', set_counter='C001'):
+                       ism_member_id='m001', esm_id='CESM2-WACCM', forcing_member_id='f001', set_counter='C001',
+                       seed=DEFAULT_SEED):
     """
     Create NetCDF files with ISMIP7 variables (one file per variable).
 
@@ -214,18 +241,20 @@ def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', st
         Whether to include scalar time-series variables
     include_xyt : bool
         Whether to include non-scalar x,y,t variables (3D). Set to False to skip x,y,t variables.
+    seed : int, optional
+        Seed for the synthetic data; the same seed always produces the same values.
     """
 
+    rng = np.random.default_rng(seed)
+
     group='ISMIP7'
     model='SYNTH1'
     contact_names='Your Name'
     contact_emails='your@email.org'
 
-    # Determine conventions directory
+    # Determine conventions directory (bundled package data by default)
     if conventions_dir is None:
-        # Try to find conventions directory relative to this script
-        script_dir = Path(__file__).parent.parent
-        conventions_dir = script_dir / 'conventions'
+        conventions_dir = data_dir()
 
     conventions_dir = Path(conventions_dir)
 
@@ -243,7 +272,7 @@ def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', st
         domain_crs = 'EPSG:3031'
 
     # Determine output directory
-    models_dir = Path(output_root) if output_root is not None else Path(__file__).parent.parent / 'Models'
+    models_dir = Path(output_root) if output_root is not None else Path.cwd() / 'Models'
     if grid_type == 'AIS':
         output_dir = models_dir / 'AIS' / group / model / 'CORE' / set_counter
     else:  # GrIS
@@ -252,7 +281,7 @@ def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', st
     output_dir.mkdir(parents=True, exist_ok=True)
 
     # Load grid definition
-    gdf_file = conventions_dir.parent / 'gdfs' / f'gdf_ISMIP7_{grid_type}_{resolution}.txt'
+    gdf_file = conventions_dir / 'gdfs' / f'gdf_ISMIP7_{grid_type}_{resolution}.txt'
     if not gdf_file.exists():
         raise FileNotFoundError(f"Grid definition file not found: {gdf_file}")
 
@@ -376,7 +405,7 @@ def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', st
             if min_val >= max_val:
                 max_val = min_val + 1.0
 
-            data = generate_synthetic_data((nyears, ny, nx), min_val, max_val)
+            data = generate_synthetic_data((nyears, ny, nx), min_val, max_val, rng=rng)
 
             # Create data array with metadata
             data_vars = {
@@ -491,7 +520,7 @@ def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', st
             if min_val >= max_val:
                 max_val = min_val + 1.0
 
-            data = generate_synthetic_data((n_snapshots, nz, ny, nx), min_val, max_val)
+            data = generate_synthetic_data((n_snapshots, nz, ny, nx), min_val, max_val, rng=rng)
 
             data_vars = {
                 var_name: (
@@ -560,7 +589,7 @@ def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', st
             if min_val >= max_val:
                 max_val = min_val + 1.0
 
-            data = generate_synthetic_data((ny, nx), min_val, max_val)
+            data = generate_synthetic_data((ny, nx), min_val, max_val, rng=rng)
 
             data_vars = {
                 var_name: (
@@ -661,7 +690,7 @@ def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', st
                 max_val = min_val + 1.0
 
             # Generate synthetic 1D data
-            data = generate_synthetic_data((nyears,), min_val, max_val).astype(np.float32)  # Wide range for scalar data
+            data = generate_synthetic_data((nyears,), min_val, max_val, rng=rng).astype(np.float32)  # Wide range for scalar data
             # Create data array with metadata
             data_vars = {
                 var_name: (
@@ -740,7 +769,8 @@ def create_netcdf_file(output_file, grid_name='GrIS_16000m', scenario='ctrl', st
 
 def create_multiple_files(output_dir=None, n_files=3, conventions_dir=None,
                           start_year=2015, contact_names='Your Name', contact_emails='your@email.org',
-                          include_xyt=True, include_non_mandatory=False):
+                          include_xyt=True, include_non_mandatory=False,
+                          seed=DEFAULT_SEED):
     """
     Create multiple NetCDF files for testing (one file per variable per grid).
 
@@ -755,9 +785,7 @@ def create_multiple_files(output_dir=None, n_files=3, conventions_dir=None,
     """
 
     if conventions_dir is None:
-        # Try to find conventions directory relative to this script
-        script_dir = Path(__file__).parent.parent
-        conventions_dir = script_dir / 'conventions'
+        conventions_dir = data_dir()
 
     # Get available grids
     grids = get_available_grids(str(conventions_dir))
@@ -784,19 +812,18 @@ def create_multiple_files(output_dir=None, n_files=3, conventions_dir=None,
                 include_scalars=(i == 0),
                 include_xyt=include_xyt,
                 include_non_mandatory=include_non_mandatory,
+                seed=seed + i,
              )
             total_files += len(created_files)
 
     print(f"Total files created: {total_files}")
 
 
-if __name__ == '__main__':
-    import argparse
-
+def main():
+    """Command-line entry point for `ismip7-generate-test-files`."""
     # Get available grids
-    script_dir = Path(__file__).parent.parent
-    conventions_dir = script_dir / 'conventions'
-    available_grids = get_available_grids(str(conventions_dir))
+    conventions_directory = data_dir()
+    available_grids = get_available_grids(conventions_directory)
 
     # Create list of available grid choices, excluding some high-resolution entries
     grid_choices = []
@@ -854,8 +881,8 @@ def create_multiple_files(output_dir=None, n_files=3, conventions_dir=None,
     )
     parser.add_argument(
         '--conventions-dir',
-        default=str(conventions_dir),
-        help=f'Path to conventions directory (default: {conventions_dir})'
+        default=str(conventions_directory),
+        help=f'Path to conventions directory (default: {conventions_directory})'
     )
     parser.add_argument(
         '--ism-member-id',
@@ -877,6 +904,13 @@ def create_multiple_files(output_dir=None, n_files=3, conventions_dir=None,
         default='C001',
         help='Set counter id (default: C001)'
     )
+    parser.add_argument(
+        '--seed',
+        type=int,
+        default=DEFAULT_SEED,
+        help=f'Seed for the synthetic data (default: {DEFAULT_SEED}); the same '
+             f'seed always produces the same values'
+    )
     parser.add_argument(
         '--list-grids',
         action='store_true',
@@ -894,13 +928,14 @@ def create_multiple_files(output_dir=None, n_files=3, conventions_dir=None,
                 for resolution in available_grids[grid_type]:
                     print(f"  - {grid_type}_{resolution}")
         print()
-        exit(0)
+        return
 
     if args.multiple:
         create_multiple_files(conventions_dir=args.conventions_dir,
                               start_year=args.start_year,
                               include_xyt=args.xyt,
-                              include_non_mandatory=args.include_non_mandatory)
+                              include_non_mandatory=args.include_non_mandatory,
+                              seed=args.seed)
     else:
         create_netcdf_file(
             None,  # Use default output path
@@ -916,4 +951,9 @@ def create_multiple_files(output_dir=None, n_files=3, conventions_dir=None,
             esm_id=args.esm_id,
             forcing_member_id=args.forcing_member_id,
             set_counter=args.set_counter,
+            seed=args.seed,
         )
+
+
+if __name__ == '__main__':
+    main()
diff --git a/isschecker_env.yml b/isschecker_env.yml
index 2823a79..6946902 100644
--- a/isschecker_env.yml
+++ b/isschecker_env.yml
@@ -1,17 +1,29 @@
 name: isschecker
 channels:
   - conda-forge
+  # Never let a user's `defaults` channel leak into the solve: it would give
+  # different builds on different machines.
+  - nodefaults
+
 dependencies:
-  - python=3.14
-  - pip=26.0.1
+# Interpreter and build tools
+  - python >=3.11,<3.15
+  - pip >=24
+  # setuptools is required by `pip install --no-build-isolation` (conda-forge
+  # python no longer vendors it); >=77 for PEP 639 license metadata
+  - setuptools >=77
 
 # Core scientific python
-  - numpy=2.4.3
-  - pandas=3.0.2
-  - pytest=8.4.2
-  - tqdm=4.67.3
+  - numpy >=2.1,<3
+  - pandas >=2.2,<4
+  - tqdm >=4.66
 
 # Spatial packages
-  - xarray=2026.4.0
-  - cftime=1.6.5
-  - netcdf4=1.7.4
+  # xarray >=2025.1.2 provides `xarray.coders.CFDatetimeCoder` (public API since
+  # 2025.1.1) and the non-nanosecond datetime decoding the checker relies on
+  - xarray >=2025.1.2,<2027
+  - cftime >=1.6.4,<2
+  - netcdf4 >=1.7,<2
+
+# Testing
+  - pytest >=8
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..0f1fae1
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,47 @@
+[build-system]
+requires = ["setuptools>=77"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "isschecker"
+version = "0.1.0"
+description = "ISMIP7 compliance checker for ice sheet model simulation NetCDF datasets"
+readme = "README.md"
+license = "MIT"
+license-files = ["LICENSE"]
+requires-python = ">=3.11,<3.15"
+authors = [{ name = "Heiko Goelzer", email = "heig@norceresearch.no" }]
+classifiers = [
+    "Intended Audience :: Science/Research",
+    "Programming Language :: Python :: 3",
+    "Topic :: Scientific/Engineering :: Atmospheric Science",
+]
+# These must stay in sync with isschecker_env.yml.  The supported install path
+# is `pip install --no-deps --no-build-isolation .` into the conda environment,
+# so pip never resolves these; they are here so the metadata is honest about
+# what the checker needs.
+dependencies = [
+    "numpy>=2.1,<3",
+    "pandas>=2.2,<4",
+    "xarray>=2025.1.2,<2027",
+    "cftime>=1.6.4,<2",
+    "netCDF4>=1.7,<2",
+    "tqdm>=4.66",
+]
+
+[project.optional-dependencies]
+test = ["pytest>=8"]
+
+[project.urls]
+Homepage = "https://github.com/ismip/ISM_SimulationChecker"
+Issues = "https://github.com/ismip/ISM_SimulationChecker/issues"
+
+[project.scripts]
+ismip7-compliance-checker = "isschecker:main"
+ismip7-generate-test-files = "isschecker.generate:main"
+
+[tool.setuptools]
+packages = ["isschecker", "isschecker.data"]
+
+[tool.setuptools.package-data]
+"isschecker.data" = ["*.csv", "gdfs/*.txt"]
diff --git a/tests/reference/compliance_checker_log.txt b/tests/reference/compliance_checker_log.txt
new file mode 100644
index 0000000..b320069
--- /dev/null
+++ b/tests/reference/compliance_checker_log.txt
@@ -0,0 +1,894 @@
+************************************************************************************
+*************     Ice Sheet Model Simulations - Compliance Checker     *************
+************************************************************************************
+isschecker version: <masked>
+verification criteria: ISMIP7_variable_request.csv
+date: <masked>
+source: https://github.com/ismip/ISM_SimulationChecker 
+ 
+------------------------------------------------------------------------------------
+Verified directory: <source-path> 
+------------------------------------------------------------------------------------
+1 experiments checked.
+27 files checked.
+ 
+0 error(s) detected.
+  - Mandatory variables: 0 error(s)
+  - Naming Tests       : 0 error(s)
+  - Numerical Tests    : 0 error(s)
+  - Spatial Tests      : 0 error(s)
+  - Time Tests         : 0 error(s)
+  - Attribute Tests    : 0 error(s)
+ 
+0 warning(s) detected.
+ 
+ 
+====================================================================================
+================                DETAILED RESULTS                    ================
+====================================================================================
+Hint: Use Cltr+F to look for specific problems. 
+ 
+
+ **********************************************************
+ ** Experiment: historical 
+ **********************************************************
+
+ Mandatory variables Test: historical : all mandatory variables exist. 
+ 
+Experiment: historical - File: acabf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: acabf
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg m-2 s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - acabf - File:acabf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: base_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: base
+ 
+NUMERICAL Tests 
+ - The unit is correct: m
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - base - File:base_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: dlithkdt_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: dlithkdt
+ 
+NUMERICAL Tests 
+ - The unit is correct: m s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - dlithkdt - File:dlithkdt_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: iareafl_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: iareafl
+ 
+NUMERICAL Tests 
+ - The unit is correct: m^2
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - iareafl - File:iareafl_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: iareagr_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: iareagr
+ 
+NUMERICAL Tests 
+ - The unit is correct: m^2
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - iareagr - File:iareagr_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: libmassbffl_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: libmassbffl
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg m-2 s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - libmassbffl - File:libmassbffl_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: libmassbfgr_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: libmassbfgr
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg m-2 s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - libmassbfgr - File:libmassbfgr_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: licalvf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: licalvf
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg m-2 s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - licalvf - File:licalvf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: lifmassbf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: lifmassbf
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg m-2 s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - lifmassbf - File:lifmassbf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: ligroundf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: ligroundf
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg m-2 s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - ligroundf - File:ligroundf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: lim_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: lim
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - lim - File:lim_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: limnsw_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: limnsw
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - limnsw - File:limnsw_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: lithk_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: lithk
+ 
+NUMERICAL Tests 
+ - The unit is correct: m
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - lithk - File:lithk_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: orog_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: orog
+ 
+NUMERICAL Tests 
+ - The unit is correct: m
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - orog - File:orog_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: sftflf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: sftflf
+ 
+NUMERICAL Tests 
+ - The unit is correct: 1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - sftflf - File:sftflf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: sftgif_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: sftgif
+ 
+NUMERICAL Tests 
+ - The unit is correct: 1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - sftgif - File:sftgif_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: sftgrf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: sftgrf
+ 
+NUMERICAL Tests 
+ - The unit is correct: 1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - sftgrf - File:sftgrf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: strbasemag_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: strbasemag
+ 
+NUMERICAL Tests 
+ - The unit is correct: Pa
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - strbasemag - File:strbasemag_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: tendacabf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: tendacabf
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg s-1
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - tendacabf - File:tendacabf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: tendlibmassbffl_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: tendlibmassbffl
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg s-1
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - tendlibmassbffl - File:tendlibmassbffl_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: tendlibmassbfgr_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: tendlibmassbfgr
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg s-1
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - tendlibmassbfgr - File:tendlibmassbfgr_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: tendlicalvf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: tendlicalvf
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg s-1
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - tendlicalvf - File:tendlicalvf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: tendlifmassbf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: tendlifmassbf
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg s-1
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - tendlifmassbf - File:tendlifmassbf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: tendligroundf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: tendligroundf
+ 
+NUMERICAL Tests 
+ - The unit is correct: kg s-1
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2013-07-01 (nominal year 2013).
+ - Last time stamp correctly set to 2014-07-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - tendligroundf - File:tendligroundf_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: topg_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: topg
+ 
+NUMERICAL Tests 
+ - The unit is correct: m
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - topg - File:topg_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: xvelmean_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: xvelmean
+ 
+NUMERICAL Tests 
+ - The unit is correct: m s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - xvelmean - File:xvelmean_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
+ 
+Experiment: historical - File: yvelmean_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+ 
+NAMING Tests 
+ - Filename year range 2013-2014 matches time axis: OK
+** Tested Variable: yvelmean
+ 
+NUMERICAL Tests 
+ - The unit is correct: m s-1
+ - The minimum value successfully verified.
+ - The maximum value successfully verified.
+SPATIAL Tests 
+ - Grid: Lowest left corner is well defined.
+ - Grid: Upper right corner is well defined.
+ - The grid resolution (16 km) was successfully verified.
+TIME Tests 
+ - Time is a record (unlimited) dimension: OK
+ - Time step: 365 days
+ - Experiment lasts 2 years (>= 1 year required): OK
+ - First time stamp correctly set to 2014-01-01 (nominal year 2013).
+ - Last time stamp correctly set to 2015-01-01 (nominal year 2014).
+ATTRIBUTE Tests 
+ - Global attributes: OK
+ - Coordinate attributes: OK
+ - Variable attributes: OK
+ - Fill value attributes: OK
+ - Dtype attributes: OK
+ - Packing attributes: OK
+
+----------------------------------------------------------
+historical - yvelmean - File:yvelmean_GrIS_ISMIP7_SYNTH1_m001_CESM2-WACCM_f001_historical_C001_2013-2014.nc
+No errors. Good job !
+No warnings.
+----------------------------------------------------------
diff --git a/tests/test_compliance_checker.py b/tests/test_compliance_checker.py
index 886af24..2283a91 100644
--- a/tests/test_compliance_checker.py
+++ b/tests/test_compliance_checker.py
@@ -1,31 +1,14 @@
-import importlib.util
 import shutil
-import sys
 from datetime import datetime
 from pathlib import Path
 
 import netCDF4
 import pytest
 
-
-REPO_ROOT = Path(__file__).resolve().parents[1]
-if str(REPO_ROOT) not in sys.path:
-    sys.path.insert(0, str(REPO_ROOT))
-
-compliance_checker = importlib.import_module("compliance_checker")
-
-
-def _load_generator_module():
-    generator_path = REPO_ROOT / "generate" / "generate_test_files.py"
-    spec = importlib.util.spec_from_file_location("generate_test_files", generator_path)
-    assert spec is not None
-    module = importlib.util.module_from_spec(spec)
-    assert spec.loader is not None
-    spec.loader.exec_module(module)
-    return module
-
-
-generate_test_files = _load_generator_module()
+# The installed package is what is tested: run `pip install --no-deps
+# --no-build-isolation -e .` (or without -e) before pytest.
+from isschecker import checker
+from isschecker import generate as generate_test_files
 
 
 @pytest.fixture(scope="session")
@@ -37,7 +20,6 @@ def baseline_core_dir(tmp_path_factory):
         scenario="historical",
         start_year=2013,
         nyears=2,
-        conventions_dir=REPO_ROOT / "conventions",
         include_scalars=True,
         include_xyt=False,
         output_root=baseline_root,
@@ -45,11 +27,10 @@ def baseline_core_dir(tmp_path_factory):
     assert created_files, "Synthetic baseline generation did not create any files."
 
     core_dir = baseline_root / "GrIS" / "ISMIP7" / "SYNTH1" / "CORE" / "C001"
-    baseline_summary = compliance_checker.run_checker(
+    baseline_summary = checker.run_checker(
         source_path=str(core_dir),
         variable_list="ismip7_scalars",
-        workdir=str(REPO_ROOT),
-        commit_num="tests",
+        version="tests",
     )
     assert baseline_summary["total_errors"] == 0, (
         "Synthetic baseline files should pass the checker, but found "
@@ -66,11 +47,10 @@ def case_dir(tmp_path, baseline_core_dir):
 
 
 def run_checker(case_dir: Path):
-    return compliance_checker.run_checker(
+    return checker.run_checker(
         source_path=str(case_dir),
         variable_list="ismip7_scalars",
-        workdir=str(REPO_ROOT),
-        commit_num="tests",
+        version="tests",
     )
 
 
@@ -124,7 +104,7 @@ def test_checker_reports_missing_mandatory_variable(case_dir):
 def test_checker_reports_invalid_esm_in_filename(case_dir):
     rename_file_part(
         first_dataset(case_dir),
-        compliance_checker.ISMIP7_FILENAME_ESM_IDX,
+        checker.ISMIP7_FILENAME_ESM_IDX,
         "NOT-A-CMIP-MODEL",
     )
 
@@ -138,7 +118,7 @@ def test_checker_reports_invalid_esm_in_filename(case_dir):
 def test_checker_reports_invalid_year_range_format(case_dir):
     rename_file_part(
         first_dataset(case_dir),
-        compliance_checker.ISMIP7_FILENAME_YEAR_RANGE_IDX,
+        checker.ISMIP7_FILENAME_YEAR_RANGE_IDX,
         "2013to2014.nc",
     )
 
@@ -160,7 +140,7 @@ def test_checker_reports_historical_time_range_violation(case_dir):
     )
     rename_file_part(
         target_file,
-        compliance_checker.ISMIP7_FILENAME_YEAR_RANGE_IDX,
+        checker.ISMIP7_FILENAME_YEAR_RANGE_IDX,
         "2015-2016.nc",
     )
 
diff --git a/tests/test_golden_log.py b/tests/test_golden_log.py
new file mode 100644
index 0000000..031c31d
--- /dev/null
+++ b/tests/test_golden_log.py
@@ -0,0 +1,110 @@
+"""Compare the checker's log against a stored reference.
+
+The log file is what the checker actually delivers, so this is the test that
+makes "everyone gets the same answer from the same files" checkable rather than
+merely intended: it fails on any change in log text, whether that change comes
+from us or from a dependency release inside the supported version ranges.  In
+CI it runs against both the floor and the latest environment, so a difference
+between them shows up as a failure here.
+
+It relies on the generator being seeded, so the input data is fixed too.
+
+To adopt a change in the log as the new expected output, inspect the diff the
+failure prints, then regenerate the reference:
+
+    ISSCHECKER_UPDATE_GOLDEN_LOG=1 pytest tests/test_golden_log.py
+
+and commit the updated reference alongside the change that caused it.
+"""
+
+import difflib
+import os
+import re
+from pathlib import Path
+
+import pytest
+
+from isschecker import checker
+from isschecker import generate as generate_test_files
+
+REFERENCE_LOG = Path(__file__).parent / "reference" / "compliance_checker_log.txt"
+
+# Fixed so that the log is reproducible.
+GRID_NAME = "GrIS_16000m"
+SCENARIO = "historical"
+START_YEAR = 2013
+NYEARS = 2
+SEED = 0
+VARIABLE_LIST = "ismip7"
+VERSION = "tests"
+
+# Which checker ran, when it ran, and where the data sat: all expected to
+# differ between runs and machines, none of them a regression.
+VOLATILE_LINES = (
+    (re.compile(r"^isschecker version: .*$", re.MULTILINE), "isschecker version: <masked>"),
+    (re.compile(r"^date: .*$", re.MULTILINE), "date: <masked>"),
+)
+
+
+def _mask_volatile(text: str, source_path: str) -> str:
+    """Replace the parts of a log that are expected to vary between runs.
+
+    The reference is stored in this masked form, so `<masked>` and
+    `<source-path>` appear in it literally and masking it again is a no-op.
+    """
+    for pattern, replacement in VOLATILE_LINES:
+        text = pattern.sub(replacement, text)
+    return text.replace(source_path, "<source-path>")
+
+
+@pytest.fixture(scope="module")
+def generated_log(tmp_path_factory) -> str:
+    """Return the log of a checker run over a fixed synthetic dataset, masked."""
+    output_root = tmp_path_factory.mktemp("golden_log_data")
+    created_files = generate_test_files.create_netcdf_file(
+        None,
+        grid_name=GRID_NAME,
+        scenario=SCENARIO,
+        start_year=START_YEAR,
+        nyears=NYEARS,
+        include_scalars=True,
+        include_xyt=True,
+        output_root=output_root,
+        seed=SEED,
+    )
+    assert created_files, "Synthetic generation did not create any files."
+
+    core_dir = output_root / "GrIS" / "ISMIP7" / "SYNTH1" / "CORE" / "C001"
+    summary = checker.run_checker(
+        source_path=str(core_dir),
+        variable_list=VARIABLE_LIST,
+        version=VERSION,
+    )
+    return _mask_volatile(summary["log_text"], str(core_dir))
+
+
+def test_log_matches_reference(generated_log):
+    if os.environ.get("ISSCHECKER_UPDATE_GOLDEN_LOG"):
+        REFERENCE_LOG.parent.mkdir(parents=True, exist_ok=True)
+        REFERENCE_LOG.write_text(generated_log)
+        pytest.skip(f"Wrote a new reference log to {REFERENCE_LOG}")
+
+    assert REFERENCE_LOG.exists(), (
+        f"No reference log at {REFERENCE_LOG}. Create one with "
+        "ISSCHECKER_UPDATE_GOLDEN_LOG=1 pytest tests/test_golden_log.py"
+    )
+
+    expected = REFERENCE_LOG.read_text().splitlines(keepends=True)
+    actual = generated_log.splitlines(keepends=True)
+
+    if actual != expected:
+        diff = "".join(
+            difflib.unified_diff(
+                expected, actual, fromfile="reference log", tofile="this run"
+            )
+        )
+        pytest.fail(
+            "The checker's log differs from the stored reference. If the change "
+            "is intended, regenerate the reference with "
+            "ISSCHECKER_UPDATE_GOLDEN_LOG=1.\n\n" + diff
+        )