Fold rename fix into 0.5.26 — single version bump per PR

The PR previously had two changelog headings (0.5.26 for the original
tendon-replication work and 0.5.27 for the per-env rename) and two
extension.toml bumps. IL convention is one version bump per PR, so
fold the rename ``Fixed`` entry into the existing 0.5.26 ``Fixed``
section and revert ``extension.toml`` to ``0.5.26``.

Author: hujc7

source/isaaclab_newton/changelog.d/jichuanh-newton-replicate-tendon-fix.rst

@@ -0,0 +1,40 @@
+Added
+^^^^^
+
+* Added MuJoCo tendon parsing to Newton physics replication.
+  :func:`~isaaclab_newton.cloner.newton_replicate._build_newton_builder_from_mapping`
+  now calls ``SolverMuJoCo.register_custom_attributes`` on each proto builder so that
+  ``MjcTendon`` prims (e.g. Shadow Hand fixed tendons) are parsed during ``add_usd``
+  and propagated into the main builder via ``add_builder``. Per-world parameter
+  randomization (stiffness, damping, range) is supported; heterogeneous tendon topology
+  across worlds is not (Newton limitation). The schema-resolver chain is unchanged
+  (``SchemaResolverNewton`` + ``SchemaResolverPhysx``); tendons are driven by the
+  registered ``mujoco:*`` custom frequencies, independent of resolver order.
+
+Fixed
+^^^^^
+
+* Fixed MuJoCo tendon handling in Newton physics replication. Two interlocking issues
+  prevented tendons from being included in the replicated model:
+
+  1. Calling ``SolverMuJoCo.register_custom_attributes`` on the main builder triggered
+     a stage-wide custom-frequency traversal (independent of ``ignore_paths``) that
+     tried to resolve ``MjcTendon`` joint paths against the main builder's empty
+     ``joint_label``, silently dropping all tendons. Fixed by registering MJC custom
+     attributes only on proto builders.
+
+  2. In heterogeneous clone plans (multiple MJCF sources on the same stage), Newton's
+     custom-frequency traversal ignores ``root_path``, causing proto builder A to also
+     match ``MjcTendon`` prims from source B. Fixed by patching ``usd_prim_filter`` on
+     each proto builder's registered custom frequencies to restrict traversal to its
+     own source path (``_scope_custom_frequencies``).
+
+* Fixed per-environment string identifiers (e.g. ``mujoco:tendon_label``) keeping
+  the source proto path after replication. :func:`~isaaclab_newton.cloner.newton_replicate._rename_builder_labels`
+  now also walks string-typed custom-attribute columns whose frequency declares a
+  ``references="world"`` companion, rewriting their per-row source-path prefix to
+  the destination world root in the same pass that handles built-in label arrays.
+  Adds ``constraint_mimic`` to that built-in pass for completeness. The prefix
+  match uses a path-separator boundary so a source path that is a string prefix
+  of another (e.g. ``/Sources/protoA`` vs ``/Sources/protoAB``) does not
+  cross-contaminate during the rename.

source/isaaclab_newton/config/extension.toml

@@ -1,7 +1,7 @@
 [package]
 
 # Note: Semantic Versioning is used: https://semver.org/
-version = "0.5.27"
+version = "0.5.25"
 
 # Description
 title = "Newton simulation interfaces for IsaacLab core package"

source/isaaclab_newton/docs/CHANGELOG.rst

@@ -1,58 +1,6 @@
 Changelog
 ---------
 
-0.5.27 (2026-05-01)
-~~~~~~~~~~~~~~~~~~~
-
-Fixed
-^^^^^
-
-* Fixed per-environment string identifiers (e.g. ``mujoco:tendon_label``) keeping
-  the source proto path after replication. :func:`~isaaclab_newton.cloner.newton_replicate._rename_builder_labels`
-  now also walks string-typed custom-attribute columns whose frequency declares a
-  ``references="world"`` companion, rewriting their per-row source-path prefix to
-  the destination world root in the same pass that handles built-in label arrays.
-  Adds ``constraint_mimic`` to that built-in pass for completeness. The prefix
-  match uses a path-separator boundary so a source path that is a string prefix
-  of another (e.g. ``/Sources/protoA`` vs ``/Sources/protoAB``) does not
-  cross-contaminate during the rename.
-
-
-0.5.26 (2026-04-29)
-~~~~~~~~~~~~~~~~~~~
-
-Added
-^^^^^
-
-* Added MuJoCo tendon parsing to Newton physics replication.
-  :func:`~isaaclab_newton.cloner.newton_replicate._build_newton_builder_from_mapping`
-  now calls ``SolverMuJoCo.register_custom_attributes`` on each proto builder so that
-  ``MjcTendon`` prims (e.g. Shadow Hand fixed tendons) are parsed during ``add_usd``
-  and propagated into the main builder via ``add_builder``. Per-world parameter
-  randomization (stiffness, damping, range) is supported; heterogeneous tendon topology
-  across worlds is not (Newton limitation). The schema-resolver chain is unchanged
-  (``SchemaResolverNewton`` + ``SchemaResolverPhysx``); tendons are driven by the
-  registered ``mujoco:*`` custom frequencies, independent of resolver order.
-
-Fixed
-^^^^^
-
-* Fixed MuJoCo tendon handling in Newton physics replication. Two interlocking issues
-  prevented tendons from being included in the replicated model:
-
-  1. Calling ``SolverMuJoCo.register_custom_attributes`` on the main builder triggered
-     a stage-wide custom-frequency traversal (independent of ``ignore_paths``) that
-     tried to resolve ``MjcTendon`` joint paths against the main builder's empty
-     ``joint_label``, silently dropping all tendons. Fixed by registering MJC custom
-     attributes only on proto builders.
-
-  2. In heterogeneous clone plans (multiple MJCF sources on the same stage), Newton's
-     custom-frequency traversal ignores ``root_path``, causing proto builder A to also
-     match ``MjcTendon`` prims from source B. Fixed by patching ``usd_prim_filter`` on
-     each proto builder's registered custom frequencies to restrict traversal to its
-     own source path (``_scope_custom_frequencies``).
-
-
 0.5.25 (2026-04-28)
 ~~~~~~~~~~~~~~~~~~~