Replace Rough.js sketch runtime with rough-go

.prettierignore

@@ -1,6 +1,5 @@
 d2renderers/d2latex/mathjax.js
 d2renderers/d2latex/polyfills.js
 d2renderers/d2latex/setup.js
-d2renderers/d2sketch/rough.js
 lib/png/generate_png.js
 d2js

README.md

@@ -207,6 +207,9 @@ D2 intends to integrate with a variety of layout engines, e.g. `dot`, as well as
 single-purpose layout types like sequence diagrams. You can choose whichever layout engine
 you like and works best for the diagram you're making.
 
+Sketch-mode rendering uses [rough-go](https://github.com/d2lang/rough-go), a native Go
+port of Rough.js 4.0.4.
+
 ## Comparison
 
 For a comparison against other popular text-to-diagram tools, see

THIRD_PARTY_NOTICES.txt

@@ -37,6 +37,38 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 
+Rough-go
+https://github.com/d2lang/rough-go
+
+Rough-go is a native Go port of Rough.js 4.0.4. The port is based on:
+
+  Rough.js 4.0.4
+  https://github.com/rough-stuff/rough
+  commit 35302b8f1119ad004b4550f9a4d4162d3d845b0a
+
+MIT License
+
+Copyright (c) 2019 Preet Shihn
+Copyright (c) 2026 rough-go contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
 elk-go
 https://github.com/d2lang/elk-go
 

ci/release/changelogs/next.md

@@ -5,6 +5,7 @@
 #### Improvements 🧹
 
 - d2dagre: replace the embedded JavaScript runtime with the native Go Dagro port without changing layout output
+- d2sketch: replace the embedded Rough.js runtime with the native Go rough-go port without changing sketch output
 - d2elk: replace the embedded JavaScript runtime with the native Go elk-go port, preserving layouts apart from sub-pixel floating-point rounding
 - d2ascii:
   - sql_table and uml class shapes are supported [#2623](https://github.com/d2lang/d2/pull/2623)

d2js/js/THIRD_PARTY_NOTICES.txt

@@ -37,6 +37,38 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 
+Rough-go
+https://github.com/d2lang/rough-go
+
+Rough-go is a native Go port of Rough.js 4.0.4. The port is based on:
+
+  Rough.js 4.0.4
+  https://github.com/rough-stuff/rough
+  commit 35302b8f1119ad004b4550f9a4d4162d3d845b0a
+
+MIT License
+
+Copyright (c) 2019 Preet Shihn
+Copyright (c) 2026 rough-go contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
 elk-go
 https://github.com/d2lang/elk-go
 

d2renderers/d2sketch/NOTICE.txt

@@ -0,0 +1,4 @@
+The native sketch renderer uses rough-go, a Go port of Rough.js 4.0.4.
+
+Source and license details are included in the repository-root
+THIRD_PARTY_NOTICES.txt and in https://github.com/d2lang/rough-go.