diff --git a/README.md b/README.md
index bb206e6..3045291 100644
--- a/README.md
+++ b/README.md
@@ -33,58 +33,60 @@ For instructions on how to cite the force fields here, see our [website](https:/
Version-specific Zenodo DOIs for particular force fields can be found in the table below.
-| Filename | FF line | Release Date | Major format changes? | Fitting repo | DOI |
-|---------------------------------------------|---------|---------------|-----------------------|-------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------|
-| `openff-2.3.0.offxml` | Sage | Jan 13, 2026 | NAGLCharges instead of ToolkitAM1BCC | [repo](https://github.com/openforcefield/ash-sage-rc2) | [](https://doi.org/10.5281/zenodo.18228115) |
-| `openff_unconstrained-2.3.0.offxml` | Sage | Jan 13, 2026 | NAGLCharges instead of ToolkitAM1BCC | [repo](https://github.com/openforcefield/ash-sage-rc2) | [](https://doi.org/10.5281/zenodo.18228115) |
-| `openff_no_water-3.0.0-alpha0.offxml` | Sage | Oct 20, 2025 | No | | [](https://doi.org/10.5281/zenodo.17401377) |
-| `openff_no_water_unconstrained-3.0.0-alpha0.offxml` | Sage | Oct 20, 2025 | No | | [](https://doi.org/10.5281/zenodo.17401377)|
-| `openff-2.3.0-rc2.offxml` | Sage | Oct 10, 2025 | NAGLCharges instead of ToolkitAM1BCC | [repo](http://github.com/lilyminium/ash-sage-rc2) | [](https://doi.org/10.5281/zenodo.17298486) |
-| `openff_unconstrained-2.3.0-rc2.offxml` | Sage | Oct 10, 2025 | NAGLCharges instead of ToolkitAM1BCC | [repo](http://github.com/lilyminium/ash-sage-rc2) | [](https://doi.org/10.5281/zenodo.17298486) |
-| `openff-2.3.0-rc1.offxml` | Sage | Sep 12, 2025 | NAGLCharges instead of ToolkitAM1BCC | [repo](http://github.com/lilyminium/ash-sage-rc1) | [](https://doi.org/10.5281/zenodo.17103546) |
-| `openff_unconstrained-2.3.0-rc1.offxml` | Sage | Sep 12, 2025 | NAGLCharges instead of ToolkitAM1BCC | [repo](http://github.com/lilyminium/ash-sage-rc1) | [](https://doi.org/10.5281/zenodo.17103546) |
-| `openff-2.2.1.offxml` | Sage | Sep 11, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.1/releases/tag/2.2.1) | [](https://doi.org/10.5281/zenodo.13754116) |
-| `openff_unconstrained-2.2.1.offxml` | Sage | Sep 11, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.1/releases/tag/2.2.1) | [](https://doi.org/10.5281/zenodo.13754116) |
-| `openff-2.2.1-rc1.offxml` | Sage | Jul 22, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.1/releases/tag/2.2.1-rc1) | |
-| `openff_unconstrained-2.2.1-rc1.offxml` | Sage | Jul 22, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.1/releases/tag/2.2.1-rc1) | |
-| `openff-2.2.0.offxml` | Sage | Apr 18, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.0/releases/tag/v2.2.0) | [](https://doi.org/10.5281/zenodo.10995191) |
-| `openff_unconstrained-2.2.0.offxml` | Sage | Apr 18, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.0/releases/tag/v2.2.0) | [](https://doi.org/10.5281/zenodo.10995191) |
-| `openff-2.2.0-rc1.offxml` | Sage | Mar 6, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.0/releases/tag/v2.2.0-rc1) | |
-| `openff_unconstrained-2.2.0-rc1.offxml` | Sage | Mar 6, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.0/releases/tag/v2.2.0-rc1) | |
-| `openff-2.1.1.offxml` | Sage | Jan 22, 2024 | No | None | [](https://doi.org/10.5281/zenodo.10553473) |
-| `openff_unconstrained-2.1.1.offxml` | Sage | Jan 22, 2024 | No | None | [](https://doi.org/10.5281/zenodo.10553473) |
-| `openff-2.1.0.offxml` | Sage | May 2, 2023 | No | [repo](https://github.com/openforcefield/sage-2.1.0) | [](https://doi.org/10.5281/zenodo.7889050) |
-| `openff_unconstrained-2.1.0.offxml` | Sage | May 2, 2023 | No | [repo](https://github.com/openforcefield/sage-2.1.0) | [](https://doi.org/10.5281/zenodo.7889050) |
-| `openff-2.1.0-rc.1.offxml` | Sage | Apr 10, 2023 | No | [repo](https://github.com/openforcefield/sage-2.1.0) | |
-| `openff_unconstrained-2.1.0-rc.1.offxml` | Sage | Apr 10, 2023 | No | [repo](https://github.com/openforcefield/sage-2.1.0) | |
-| `openff-2.0.0.offxml` | Sage | Aug 16, 2021 | No | [repo](https://github.com/openforcefield/openff-sage/tree/2.0.0-rc.1) | [](https://doi.org/10.5281/zenodo.5214478) |
-| `openff_unconstrained-2.0.0.offxml` | Sage | Aug 16, 2021 | No | [repo](https://github.com/openforcefield/openff-sage/tree/2.0.0-rc.1) | [](https://doi.org/10.5281/zenodo.5214478) |
-| `openff-2.0.0-rc.2.offxml` | Sage | Aug 3, 2021 | No | None | [](https://doi.org/10.5281/zenodo.5156698) |
-| `openff_unconstrained-2.0.0-rc.2.offxml` | Sage | Aug 3, 2021 | No | None | [](https://doi.org/10.5281/zenodo.5156698) |
-| `openff-2.0.0-rc.1.offxml` | Sage | June 21, 2021 | No | [repo](https://github.com/openforcefield/openff-sage/releases/tag/2.0.0-rc.1) | [](https://doi.org/10.5281/zenodo.5009196) |
-| `openff_unconstrained-2.0.0-rc.1.offxml` | Sage | June 21, 2021 | No | [repo](https://github.com/openforcefield/openff-sage/releases/tag/2.0.0-rc.1) | [](https://doi.org/10.5281/zenodo.5009196) |
-| `openff-1.3.1.offxml` | Parsley | June 21, 2021 | No | None | [](https://doi.org/10.5281/zenodo.5009058) |
-| `openff_unconstrained-1.3.1.offxml` | Parsley | June 21, 2021 | No | None | [](https://doi.org/10.5281/zenodo.5009058) |
-| `openff-1.3.1-alpha.1.offxml` | Parsley | Apr 15, 2021 | No | None | [](https://doi.org/10.5281/zenodo.4697390) |
-| `openff_unconstrained-1.3.1-alpha.1.offxml` | Parsley | Apr 15, 2021 | No | None | [](https://doi.org/10.5281/zenodo.4697390) |
-| `openff-1.3.0.offxml` | Parsley | Oct 21, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.3.0) | [](https://doi.org/10.5281/zenodo.4118484) |
-| `openff_unconstrained-1.3.0.offxml` | Parsley | Oct 21, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.3.0) | [](https://doi.org/10.5281/zenodo.4118484) |
-| `openff-1.2.1.offxml` | Parsley | Sep 9, 2020 | No | None | [](https://doi.org/10.5281/zenodo.4021623) |
-| `openff_unconstrained-1.2.1.offxml` | Parsley | Sep 9, 2020 | No | None | [](https://doi.org/10.5281/zenodo.4021623) |
-| `openff-1.2.0.offxml` | Parsley | May 29, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.2.0) | [](https://doi.org/10.5281/zenodo.3872244) |
-| `openff_unconstrained-1.2.0.offxml` | Parsley | May 29, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.2.0) | [](https://doi.org/10.5281/zenodo.3872244) |
-| `openff-1.1.1.offxml` | Parsley | Apr 14, 2020 | No | None | [](https://doi.org/10.5281/zenodo.3751818) |
-| `openff_unconstrained-1.1.1.offxml` | Parsley | Apr 14, 2020 | No | None | [](https://doi.org/10.5281/zenodo.3751818) |
-| `openff-1.1.0.offxml` | Parsley | Mar 3, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.1.0) | [](https://doi.org/10.5281/zenodo.3695094) |
-| `openff_unconstrained-1.1.0.offxml` | Parsley | Mar 3, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.1.0) | [](https://doi.org/10.5281/zenodo.3695094) |
-| `openff-1.0.1.offxml` | Parsley | Apr 14, 2020 | No | None | [](https://doi.org/10.5281/zenodo.3751812) |
-| `openff_unconstrained-1.0.1.offxml` | Parsley | Apr 14, 2020 | No | None | [](https://doi.org/10.5281/zenodo.3751812) |
-| `openff-1.0.0.offxml` | Parsley | Oct 12, 2019 | No | [repo](https://github.com/j-wags/release-1-fitting/releases/tag/v1.0.0-RC2) | [](https://doi.org/10.5281/zenodo.3483227) |
-| `openff_unconstrained-1.0.0.offxml` | Parsley | Oct 12, 2019 | No | [repo](https://github.com/j-wags/release-1-fitting/releases/tag/v1.0.0-RC2) | [](https://doi.org/10.5281/zenodo.3483227) |
-| `openff-1.0.0-RC2.offxml` | None | Oct 4, 2019 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v0.0.9) | [](https://doi.org/10.5281/zenodo.3473554) |
-| `openff_unconstrained-1.0.0-RC2.offxml` | None | Oct 4, 2019 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v0.0.9) | [](https://doi.org/10.5281/zenodo.3473554) |
-| `openff-1.0.0-RC1.offxml` | None | Oct 4, 2019 | N/A | None | None |
-| `openff_unconstrained-1.0.0-RC1.offxml` | None | Oct 4, 2019 | N/A | None | None |
+| Filename | FF line | Release Date | Major format changes? | Fitting repo | DOI |
+|------------------------------------------------------|----------|---------------|-----------------------|-------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------|
+| `openff_no_water-3.0.0-alpha2b.offxml` | Rosemary | Sep 11, 2026 | No | | |
+| `openff_no_water_unconstrained-3.0.0-alpha2b.offxml` | Rosemary | Sep 11, 2026 | No | | |
+| `openff-2.3.0.offxml` | Sage | Jan 13, 2026 | NAGLCharges instead of ToolkitAM1BCC | [repo](https://github.com/openforcefield/ash-sage-rc2) | [](https://doi.org/10.5281/zenodo.18228115) |
+| `openff_unconstrained-2.3.0.offxml` | Sage | Jan 13, 2026 | NAGLCharges instead of ToolkitAM1BCC | [repo](https://github.com/openforcefield/ash-sage-rc2) | [](https://doi.org/10.5281/zenodo.18228115) |
+| `openff_no_water-3.0.0-alpha0.offxml` | Rosemary | Oct 20, 2025 | No | | [](https://doi.org/10.5281/zenodo.17401377) |
+| `openff_no_water_unconstrained-3.0.0-alpha0.offxml` | Rosemary | Oct 20, 2025 | No | | [](https://doi.org/10.5281/zenodo.17401377) |
+| `openff-2.3.0-rc2.offxml` | Sage | Oct 10, 2025 | NAGLCharges instead of ToolkitAM1BCC | [repo](http://github.com/lilyminium/ash-sage-rc2) | [](https://doi.org/10.5281/zenodo.17298486) |
+| `openff_unconstrained-2.3.0-rc2.offxml` | Sage | Oct 10, 2025 | NAGLCharges instead of ToolkitAM1BCC | [repo](http://github.com/lilyminium/ash-sage-rc2) | [](https://doi.org/10.5281/zenodo.17298486) |
+| `openff-2.3.0-rc1.offxml` | Sage | Sep 12, 2025 | NAGLCharges instead of ToolkitAM1BCC | [repo](http://github.com/lilyminium/ash-sage-rc1) | [](https://doi.org/10.5281/zenodo.17103546) |
+| `openff_unconstrained-2.3.0-rc1.offxml` | Sage | Sep 12, 2025 | NAGLCharges instead of ToolkitAM1BCC | [repo](http://github.com/lilyminium/ash-sage-rc1) | [](https://doi.org/10.5281/zenodo.17103546) |
+| `openff-2.2.1.offxml` | Sage | Sep 11, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.1/releases/tag/2.2.1) | [](https://doi.org/10.5281/zenodo.13754116) |
+| `openff_unconstrained-2.2.1.offxml` | Sage | Sep 11, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.1/releases/tag/2.2.1) | [](https://doi.org/10.5281/zenodo.13754116) |
+| `openff-2.2.1-rc1.offxml` | Sage | Jul 22, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.1/releases/tag/2.2.1-rc1) | |
+| `openff_unconstrained-2.2.1-rc1.offxml` | Sage | Jul 22, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.1/releases/tag/2.2.1-rc1) | |
+| `openff-2.2.0.offxml` | Sage | Apr 18, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.0/releases/tag/v2.2.0) | [](https://doi.org/10.5281/zenodo.10995191) |
+| `openff_unconstrained-2.2.0.offxml` | Sage | Apr 18, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.0/releases/tag/v2.2.0) | [](https://doi.org/10.5281/zenodo.10995191) |
+| `openff-2.2.0-rc1.offxml` | Sage | Mar 6, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.0/releases/tag/v2.2.0-rc1) | |
+| `openff_unconstrained-2.2.0-rc1.offxml` | Sage | Mar 6, 2024 | No | [repo](https://github.com/openforcefield/sage-2.2.0/releases/tag/v2.2.0-rc1) | |
+| `openff-2.1.1.offxml` | Sage | Jan 22, 2024 | No | None | [](https://doi.org/10.5281/zenodo.10553473) |
+| `openff_unconstrained-2.1.1.offxml` | Sage | Jan 22, 2024 | No | None | [](https://doi.org/10.5281/zenodo.10553473) |
+| `openff-2.1.0.offxml` | Sage | May 2, 2023 | No | [repo](https://github.com/openforcefield/sage-2.1.0) | [](https://doi.org/10.5281/zenodo.7889050) |
+| `openff_unconstrained-2.1.0.offxml` | Sage | May 2, 2023 | No | [repo](https://github.com/openforcefield/sage-2.1.0) | [](https://doi.org/10.5281/zenodo.7889050) |
+| `openff-2.1.0-rc.1.offxml` | Sage | Apr 10, 2023 | No | [repo](https://github.com/openforcefield/sage-2.1.0) | |
+| `openff_unconstrained-2.1.0-rc.1.offxml` | Sage | Apr 10, 2023 | No | [repo](https://github.com/openforcefield/sage-2.1.0) | |
+| `openff-2.0.0.offxml` | Sage | Aug 16, 2021 | No | [repo](https://github.com/openforcefield/openff-sage/tree/2.0.0-rc.1) | [](https://doi.org/10.5281/zenodo.5214478) |
+| `openff_unconstrained-2.0.0.offxml` | Sage | Aug 16, 2021 | No | [repo](https://github.com/openforcefield/openff-sage/tree/2.0.0-rc.1) | [](https://doi.org/10.5281/zenodo.5214478) |
+| `openff-2.0.0-rc.2.offxml` | Sage | Aug 3, 2021 | No | None | [](https://doi.org/10.5281/zenodo.5156698) |
+| `openff_unconstrained-2.0.0-rc.2.offxml` | Sage | Aug 3, 2021 | No | None | [](https://doi.org/10.5281/zenodo.5156698) |
+| `openff-2.0.0-rc.1.offxml` | Sage | June 21, 2021 | No | [repo](https://github.com/openforcefield/openff-sage/releases/tag/2.0.0-rc.1) | [](https://doi.org/10.5281/zenodo.5009196) |
+| `openff_unconstrained-2.0.0-rc.1.offxml` | Sage | June 21, 2021 | No | [repo](https://github.com/openforcefield/openff-sage/releases/tag/2.0.0-rc.1) | [](https://doi.org/10.5281/zenodo.5009196) |
+| `openff-1.3.1.offxml` | Parsley | June 21, 2021 | No | None | [](https://doi.org/10.5281/zenodo.5009058) |
+| `openff_unconstrained-1.3.1.offxml` | Parsley | June 21, 2021 | No | None | [](https://doi.org/10.5281/zenodo.5009058) |
+| `openff-1.3.1-alpha.1.offxml` | Parsley | Apr 15, 2021 | No | None | [](https://doi.org/10.5281/zenodo.4697390) |
+| `openff_unconstrained-1.3.1-alpha.1.offxml` | Parsley | Apr 15, 2021 | No | None | [](https://doi.org/10.5281/zenodo.4697390) |
+| `openff-1.3.0.offxml` | Parsley | Oct 21, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.3.0) | [](https://doi.org/10.5281/zenodo.4118484) |
+| `openff_unconstrained-1.3.0.offxml` | Parsley | Oct 21, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.3.0) | [](https://doi.org/10.5281/zenodo.4118484) |
+| `openff-1.2.1.offxml` | Parsley | Sep 9, 2020 | No | None | [](https://doi.org/10.5281/zenodo.4021623) |
+| `openff_unconstrained-1.2.1.offxml` | Parsley | Sep 9, 2020 | No | None | [](https://doi.org/10.5281/zenodo.4021623) |
+| `openff-1.2.0.offxml` | Parsley | May 29, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.2.0) | [](https://doi.org/10.5281/zenodo.3872244) |
+| `openff_unconstrained-1.2.0.offxml` | Parsley | May 29, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.2.0) | [](https://doi.org/10.5281/zenodo.3872244) |
+| `openff-1.1.1.offxml` | Parsley | Apr 14, 2020 | No | None | [](https://doi.org/10.5281/zenodo.3751818) |
+| `openff_unconstrained-1.1.1.offxml` | Parsley | Apr 14, 2020 | No | None | [](https://doi.org/10.5281/zenodo.3751818) |
+| `openff-1.1.0.offxml` | Parsley | Mar 3, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.1.0) | [](https://doi.org/10.5281/zenodo.3695094) |
+| `openff_unconstrained-1.1.0.offxml` | Parsley | Mar 3, 2020 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v1.1.0) | [](https://doi.org/10.5281/zenodo.3695094) |
+| `openff-1.0.1.offxml` | Parsley | Apr 14, 2020 | No | None | [](https://doi.org/10.5281/zenodo.3751812) |
+| `openff_unconstrained-1.0.1.offxml` | Parsley | Apr 14, 2020 | No | None | [](https://doi.org/10.5281/zenodo.3751812) |
+| `openff-1.0.0.offxml` | Parsley | Oct 12, 2019 | No | [repo](https://github.com/j-wags/release-1-fitting/releases/tag/v1.0.0-RC2) | [](https://doi.org/10.5281/zenodo.3483227) |
+| `openff_unconstrained-1.0.0.offxml` | Parsley | Oct 12, 2019 | No | [repo](https://github.com/j-wags/release-1-fitting/releases/tag/v1.0.0-RC2) | [](https://doi.org/10.5281/zenodo.3483227) |
+| `openff-1.0.0-RC2.offxml` | None | Oct 4, 2019 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v0.0.9) | [](https://doi.org/10.5281/zenodo.3473554) |
+| `openff_unconstrained-1.0.0-RC2.offxml` | None | Oct 4, 2019 | No | [repo](https://github.com/openforcefield/openforcefield-forcebalance/releases/tag/v0.0.9) | [](https://doi.org/10.5281/zenodo.3473554) |
+| `openff-1.0.0-RC1.offxml` | None | Oct 4, 2019 | N/A | None | None |
+| `openff_unconstrained-1.0.0-RC1.offxml` | None | Oct 4, 2019 | N/A | None | None |
Details for various water models and other force fields ported to SMIRNOFF format can be found in the table below:
@@ -208,6 +210,8 @@ Force fields moving forward will be called `name-X.Y.Z`
- `2026.01.0` This release adds the Sage 2.3.0 force fields. See the release notes for more details.
+- `2026.09.0` This release adds the openff-3.0.0-alpha2b force fields. See the release notes for more details.
+
## Authorship
diff --git a/canary/scripts/test_hmr.py b/canary/scripts/test_hmr.py
index a6d3d11..ca004e7 100644
--- a/canary/scripts/test_hmr.py
+++ b/canary/scripts/test_hmr.py
@@ -61,7 +61,7 @@ def hmr_driver(mol, ff_name):
# generate conformers, minimize, and set positions
mol.generate_conformers(n_conformers=1)
- ff = ForceField(f"{ff_name}.offxml")
+ ff = ForceField(ff_name)
ic = ff.create_interchange(mol.to_topology())
ic.minimize()
context.setPositions(ic.positions.to_openmm())
@@ -84,7 +84,7 @@ def hmr_driver(mol, ff_name):
for line in sys.stdin:
if "_unconstrained" in line:
continue
- ff_name = line.split("/")[-1][:-8]
+ ff_name = line.split("/")[-1].strip()
# Molecule.from_file fails on pathlib.Path ojects, despite being str-like
hmr_mols = Molecule.from_file(
str(propyne_mols),
diff --git a/openforcefields/offxml/openff_no_water-3.0.0-alpha2b.offxml b/openforcefields/offxml/openff_no_water-3.0.0-alpha2b.offxml
new file mode 100644
index 0000000..ad4cb62
--- /dev/null
+++ b/openforcefields/offxml/openff_no_water-3.0.0-alpha2b.offxml
@@ -0,0 +1,392 @@
+
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+ The Open Force Field Initiative
+ 2026-09-11
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diff --git a/openforcefields/offxml/openff_no_water_unconstrained-3.0.0-alpha2b.offxml b/openforcefields/offxml/openff_no_water_unconstrained-3.0.0-alpha2b.offxml
new file mode 100644
index 0000000..b3ef3ad
--- /dev/null
+++ b/openforcefields/offxml/openff_no_water_unconstrained-3.0.0-alpha2b.offxml
@@ -0,0 +1,389 @@
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