diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ec5b1b..9d2b5d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.29.0] - 2026-08-27
+
+### Added
+
+- **`DeviceProvider.Features()`** — returns `gputypes.Features` bitfield of optional device capabilities. Enables consumers (g3d, gg) to query features like `FeatureRayQuery` without importing wgpu directly. Returns 0 if implementation does not track features (backward compatible). Matches Rust wgpu `device.features()` pattern.
+
+### Changed
+
+- **deps:** gputypes v0.5.2 → v0.6.0 (ray tracing types)
+
 ## [0.28.0] - 2026-08-13
 
 ### Added
diff --git a/README.md b/README.md
index d27e7b5..32296a7 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ go get github.com/gogpu/gpucontext
 
 ## Features
 
-- **DeviceProvider** — Interface for injecting GPU device and queue (typed, zero `any`)
+- **DeviceProvider** — Interface for injecting GPU device, queue, and feature queries (typed, zero `any`)
 - **WindowProvider** — Window geometry, DPI scale factor, and redraw requests
 - **PlatformProvider** — Clipboard, cursor, dark mode, and accessibility preferences
 - **CursorShape** — 12 standard cursor shapes (arrow, pointer, text, resize, etc.)
diff --git a/ROADMAP.md b/ROADMAP.md
index e6e957b..f836a1c 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -4,21 +4,39 @@
 
 `gpucontext` is the shared foundation for the [gogpu](https://github.com/gogpu) ecosystem, providing interfaces and utilities for GPU resource sharing without circular dependencies.
 
-## Current: v0.18.0
-
-- SubpixelLayout on PlatformProvider (ADR-024, LCD/ClearType auto-detection)
-- AdapterInfo on DeviceProvider (ADR-020, render mode auto-selection)
-- WindowChrome.SetFullscreen / IsFullscreen (ADR-018, runtime fullscreen toggle)
-- CursorMode (Locked/Confined/Normal) for mouse grab / pointer lock
-- PointerEvent.DeltaX/DeltaY for relative mouse movement
-- WindowChrome interface for frameless window support
+## Current: v0.29.0
+
+- `DeviceProvider.Features()` — query device capabilities (FeatureRayQuery, etc.)
+- SurfaceCompositor interface (ADR-067)
+- MouseButton/Modifiers stringers
+- Key enum redesign (grouped explicit bases, binary-stable)
+- DamageSource registration (ADR-065)
+- SubpixelLayout on PlatformProvider (ADR-024)
+- AdapterInfo on DeviceProvider (ADR-020)
+- WindowChrome.SetFullscreen / IsFullscreen (ADR-018)
+- CursorMode (Locked/Confined/Normal) for mouse grab
 - WindowProvider, PlatformProvider, DeviceProvider, TextureUpdater, EventSource
-- Texture interfaces (multi-touch, pressure, radius)
-- W3C Pointer Events Level 3, Scroll events, Gesture events
-- IME support for CJK input
 
 ## Released
 
+### v0.29.0 (2026-08-27)
+- `DeviceProvider.Features()` — gputypes.Features bitfield for capability queries
+
+### v0.28.0 (2026-08-13)
+- MouseButton.String(), Modifiers.String()
+
+### v0.27.0 (2026-08-10)
+- SurfaceCompositor interface (ADR-067)
+
+### v0.26.0 (2026-08-10)
+- Key enum redesign (grouped explicit bases)
+
+### v0.24.0 (2026-07-21)
+- DamageSource registration (ADR-065)
+
+### v0.18.0 (2026-05-09)
+- SubpixelLayout on PlatformProvider
+
 ### v0.12.0 (2026-04-09)
 - CursorMode + PointerEvent DeltaX/DeltaY for mouse grab (gogpu#173)
 
diff --git a/device_provider.go b/device_provider.go
index 27f07bb..fe67daa 100644
--- a/device_provider.go
+++ b/device_provider.go
@@ -52,4 +52,10 @@ type DeviceProvider interface {
 	// prefer CPU rasterizer over GPU shader interpreter.
 	// Returns AdapterTypeUnknown if adapter info is not available.
 	AdapterInfo() AdapterInfo
+
+	// Features returns the set of optional features supported by this device.
+	// Consumers (e.g., g3d) can query capabilities like FeatureRayQuery
+	// without importing wgpu. Returns 0 if the implementation does not
+	// track features (backward compatible — treat as no optional features).
+	Features() gputypes.Features
 }
diff --git a/go.mod b/go.mod
index 275cc20..32ee990 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/gogpu/gpucontext
 
 go 1.25
 
-require github.com/gogpu/gputypes v0.5.2
+require github.com/gogpu/gputypes v0.6.0
diff --git a/go.sum b/go.sum
index 762a744..fac6f2e 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-github.com/gogpu/gputypes v0.5.2 h1:3sbKI0+XW36Ekd3d4QhkbpdY7gbgMVgp8Q4+ZNdGhtE=
-github.com/gogpu/gputypes v0.5.2/go.mod h1:cnXrDMwTpWTvJLW1Vreop3PcT6a2YP/i3s91rPaOavw=
+github.com/gogpu/gputypes v0.6.0 h1:nfjx0ek0jU97ziHmukJgUJZBzlTlls9hsnEeqIEZUxM=
+github.com/gogpu/gputypes v0.6.0/go.mod h1:cnXrDMwTpWTvJLW1Vreop3PcT6a2YP/i3s91rPaOavw=