[shai-almog]

What

• Simulator. A foldable skin can be a book fold, a flip or a dual-screen device, and it can have a cover display.
  • The device is drawn in 3D with com.codename1.gpu and animates between postures (flat, half, closed).
  • Closing the device moves the app to the cover display.
  • Rotation is animated in 3D.
  • The bundled iPhoneDuo skin is a foldable.
• Recording.
  • A scripted recording runs in lockstep: the animation clock is pinned to each frame's timestamp, so folds and turns play smoothly at 60 fps however slowly the machine renders.
  • Simulate -> Record Device Tour records such a clip from the menu.
  • Hidden mode runs the simulator with no window, for agents: CN1_SIMULATOR_HIDDEN=1, -Dcn1.agent.hidden=true in Maven, -Pcn1.agent.hidden=true in Gradle.
• Skin Designer.
  • Foldable and dual-screen authoring.
  • Frame sizes are physical units (0.2 mm at the device's density), so a camera hole is no longer half again too large.
  • The corner mask had an off-by-one that drew a faint outline around every skin. Fixed.
  • The cover image is the folded half of the body, with the cover screen at its real size.
• devices.json. Curated data for the foldables and the Surface Duo 1 and 2, in tools/devicedb/foldables.json, applied by build_devices_json.py.
• Agent skill.
  • A new reference, promo-videos-and-skins.md.
  • A new tool, SkinTool.java, builds a skin for any phone in the current device database, foldables included, with the same geometry as the designer.
  • Sim.java gains recording options and a fold command.

Verification

• The javase tests pass:

  Test	Tests
  FoldMotionTest	14
  FoldableSkinTest	5
  BundledFoldableSkinTest	1
  JavaSESoftwareDeviceBlendTest	5
  RecordingTest	13

• SpotBugs reports zero findings for the Maven plugin and the Gradle plugin.

• The control-character, author-tag and since-tag gates pass.

• The skin designer's common module compiles.

• Recordings checked by hand:

  • lockstep 60 fps tours, with the simulator visible and hidden;
  • a Pixel 9 skin built by SkinTool, loaded in the simulator and recorded.

• Two adversarial review passes. Their findings are fixed in this PR:

  • The recorder's stop() could deadlock when called on the EDT during a lockstep recording. It now uses a SecondaryLoop.
  • A cover display shrunk to fit its body reported the wrong ppi.
  • A dual-screen device got a camera cutout it doesn't have.

🤖 Generated with Claude Code

[shai-almog]

JavaSE simulator screenshot updates

Compared 12 screenshots: 11 matched, 1 updated.

• javase-single-native-theme-ios-modern — updated screenshot. Screenshot differs (2200x1400 px, bit depth 8).

  
  Preview info: JPEG preview quality 20; JPEG preview quality 20; downscaled to 1540x980.
  Full-resolution PNG saved as javase-single-native-theme-ios-modern.png in workflow artifacts.

[github-actions]

Developer Guide build artifacts are available for download from this workflow run:

• Developer Guide HTML package
• Developer Guide PDF
• AsciiDoc linter report
• Vale report
• Unused image report
• Paragraph capitalization report
• LanguageTool report

Developer Guide quality checks:

• AsciiDoc linter: No issues found (report)
• Vale: 1 alert(s) (0 errors, 1 warnings, 0 suggestions) (report)
• Paragraph capitalization: No paragraph capitalization issues (report)
• LanguageTool: No grammar matches (report)
• Image references: No unused images detected (report)

[github-actions]

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