Individual skill
ink-app-builder
Adds inking and freehand drawing capabilities to an Android app using Jetpack Ink (androidx.ink) and Compose. Use this skill when implementing stylus or touch drawing surfaces, rendering wet and dry ink strokes, configuring stock brushes (pressure pen, marker, highlighter), implementing geometry-based erasing, linear undo and redo history, or stroke persistence with Room. Delivers working Compose and ViewModel implementations. Don't use for View-based (XML) inking or programmatic custom BrushFamily creation. For custom BrushFamily creation, custom tip shapes, or behavior node graphs, suggest the ink-custom-brush-builder skill.
jetpack-compose/ink/ink-app-builder/SKILL.md
Source commit 6daa53ef27fa2aa87827d183a85c06cedceca833
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- No
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Not checked yet
- Last checked
- Nov 3, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
Install this skill
Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.
An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 10,411
- Repository last updated
- Nov 5, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- skills Repository topic
- engineering Derived category
Declared tags are partial or unavailable.
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
Browse files
SKILL.mdcore · 15,618 bytesSKILL.mdcore · 15,618 bytesSKILL.mdcore · 15,618 bytesreferences/android/develop/ui/compose/touch-input/stylus-input/ink-api-brush-apis.mddoc · 5,135 bytesreferences/android/develop/ui/compose/touch-input/stylus-input/ink-api-draw-stroke.mddoc · 2,115 bytesreferences/android/develop/ui/compose/touch-input/stylus-input/ink-api-geometry-apis.mddoc · 1,238 bytesreferences/android/develop/ui/compose/touch-input/stylus-input/ink-api-setup.mddoc · 1,226 bytesreferences/android/develop/ui/compose/touch-input/stylus-input/ink-api-state-preservation.mddoc · 12,150 bytesreferences/drawing-and-brushes.mddoc · 9,197 bytesreferences/editing-and-architecture.mddoc · 10,463 bytesreferences/persistence-and-advanced.mddoc · 10,901 bytes
Read excerpt
The Android Ink API (`androidx.ink`) is a modular Jetpack library for building
high-performance, low-latency freehand drawing experiences on Android. It uses a
**wet ink and dry ink** two-phase model:
- **Wet ink** : Real-time, ultra-low-latency rendering while the user is drawing, handled by the `InProgressStrokes` composable.
- **Dry ink** : Finalized, immutable `Stroke` objects rendered by the app using `CanvasStrokeRenderer`.
## Setup and dependencies
The Ink API requires **`minSdk = 26`** , which corresponds to Android 8.0 (API
level 26) and higher. All `androidx.ink` modules MUST share an identical version
in `gradle/libs.versions.toml`. Ask user permission before modifying project
build files.
