v4.20.0

[4.20.0] - 2026-09-05

Added

• Documented the ti.game gamepad surface: buttondown/buttonup, stick and trigger events, button names normalized across pads, dead-zone and stick-press thresholds, and the read-only gamepads/gamepad properties.
• Documented circular horizontal worlds (gameView.worldWrapX, per-sprite wrapWorldX) and the solidimpact event with its per-sprite impactThreshold.
• Documented the PurgeTSS images: key validation: the five valid top-level keys, the three inside files[], filename now required, and the run aborting before it writes anything.

Changed

• Re-pinned the ti-game skill to upstream 3bea2f4 (2026-09-02), refreshed the 34-demo catalog with worldwrap.js, and recorded the 0.5.0/0.6.0 manifest split so the build date is preferred over the version string.
• Re-audited the PurgeTSS skill against purgetss-docs@f7018ea and purgeTSS@bb2eb8e (v7.17.0).
• Corrected the images: block across the skill to the five keys in the order the CLI writes them, and scoped quality to webp/jpeg/avif/tiff — PNG is written with compressionLevel: 9 and GIF takes no quality parameter.
• Updated install-dependencies and create --dependencies to the flat eslint.config.mjs template installed with only eslint and @eslint/js; eslint-config-axway and eslint-plugin-alloy are no longer installed.