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Add cross-platform canvas orchestration and typed composer Enable native ARM dependencies, macOS Copilot orchestration, portable service supervision, CPU dictation, and a shared N-key speak-or-type composer. Co-authored-by: Copilot <[email protected]> Copilot-Session: f68442b1-fa8f-46a0-9689-81710613bbd4
author MrJuneJune <me@mrjunejune.com>
date Thu, 20 Aug 2026 20:45:25 -0700
parents c57149ad216e
children
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1 # Infinite Canvas
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2
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3 Native and WebAssembly Raylib 6 prototype for a world-space, immediate-mode
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4 infinite canvas.
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5
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6 ## Build and run
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7
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8 ```bash
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9 # Native development build with Raygui controls. This automatically selects
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10 # Linux, macOS, or Windows and the host CPU architecture.
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11 bazel run //infinite_canvas:dev
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12
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13 # Start directly in the ten-browser stress scene
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14 INFINITE_CANVAS_BROWSER_STRESS=1 bazel run //infinite_canvas:dev
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15
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16 # Native build without development UI
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17 bazel run //infinite_canvas:app
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18
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19 # Browser build and local server
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20 bazel build //infinite_canvas:infinite_canvas_wasm
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21 bazel run //infinite_canvas:serve
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22 ```
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23
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24 ### Native platform support
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25
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26 | Host | Canvas and CEF | Copilot orchestration |
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27 | --- | --- | --- |
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28 | Linux x86-64 | Supported | Supported |
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29 | macOS Apple Silicon | Supported | Supported |
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30 | macOS Intel | Supported | Supported |
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31 | Windows ARM64 | Supported | Not yet; uses the explicit unavailable-service response |
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32 | Windows x86-64 | Supported | Not yet; uses the explicit unavailable-service response |
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33
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34 The default `//infinite_canvas:dev` and `//infinite_canvas:app` targets select
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35 the current host automatically. The explicit `//config:macos_arm64` and
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36 `//config:windows_arm64` platform targets are intended for CI and reproducible
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37 build selection:
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38
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39 ```bash
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40 bazel build //infinite_canvas:dev_bin --platforms=//config:macos_arm64
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41 bazel build //infinite_canvas:dev_bin --platforms=//config:windows_arm64
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42 ```
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43
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44 These commands require a matching native C/C++ toolchain. They do not imply
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45 cross-compilation from Linux. Raylib 6.0 and CEF 151 are selected by both OS
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46 and CPU, so an ARM64 host no longer links x86-64 browser or rendering
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47 libraries.
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48
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49 Open `http://127.0.0.1:4343/index.html` after starting the server. Pass a
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50 different port as an argument only when needed.
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51
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52 The native development target opens at 1920x1200 and starts with a gallery
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53 layout containing one non-overlapping example of every entity type.
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54
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55 Theme mode defaults to `auto`, which follows the OS light/dark preference at
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56 startup. Rendering consumes a shared semantic `Canvas_Theme` palette for the
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57 canvas, developer controls, and camera-pinned notifications. Until the planned
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58 config file lands, `INFINITE_CANVAS_THEME=light|dark|auto` provides an explicit
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59 override. The developer panel also includes a live light/dark mode toggle.
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60
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61 ## Controls
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62
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63 - Middle-mouse drag, or Space + left-mouse drag: pan
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64 - Mouse wheel: scroll vertically
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65 - Ctrl/Cmd + mouse wheel: zoom around the cursor
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66 - WASD or arrow keys: pan (disabled while a text area has keyboard focus)
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67 - Left-mouse drag on an entity: select and move it
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68 - `P`: pin or unpin the selected entity in screen space so it remains visible
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69 while the camera pans and zooms; pinned entities show a Lucide pin glyph
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70 - `M`: show centered live dictation text and toggle microphone capture
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71 - `N`: open and focus the same Dictation entity for keyboard input
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72 - `Enter`: send the shared spoken or typed thought to the spatial agent
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73 - `Shift+Enter`: insert a newline while typing in the Dictation entity
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74 - `Ctrl/Cmd+Enter`: submit the selected text area's thought to Copilot
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75 - `Delete`/`Backspace`: fade out and remove the selected entity
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76 - Development toolbar: spawn/clear entities, reset the camera, or restore the
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77 deterministic demo scene; spawned entities fade in and Clear fades all
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78 entities out before removal. Use the header arrow to collapse the toolbar
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79 into a small restore button.
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80 - `View camera context`: open a live, scrollable snapshot of entities
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81 intersecting the camera viewport and their current semantic values
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82 - `Lucide icon gallery`: create or revisit a dedicated canvas region containing
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83 the complete searchable, scrollable Lucide 1.31.0 icon set and fit the camera
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84 to it
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85 - `10 browser stress scene`: lay out ten compact independent browser views for
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86 performance testing
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87 - `White`/`Grid`: toggle the optional grid; the default canvas is pure white
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88
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89 Canvas primitives include shapes, lines, text, buttons, editable text areas,
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90 dropdowns, accordions, cards, calendars, switches, tables, notifications,
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91 scrollable areas, images, and web content. Accordions
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92 expand with eased height, chevron, divider, and content transitions; cards
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93 toggle emphasis, calendars select dates, and switches animate their track color
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94 and thumb position when toggled. The default browser build embeds
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95 `https://mrjunejune.com` in a camera-tracked iframe. Native builds open
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96 `https://www.google.com` in a CEF off-screen browser whose pixel buffer is
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97 uploaded into a Raylib texture. It remains inside the canvas and participates
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98 in pan, zoom, clipping, and entity dragging on Windows, macOS, and Linux. Web
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99 views show a Raylib-rendered Lucide back/forward toolbar and current URL only
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100 while selected. The toolbar eases open by pushing the page viewport downward
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101 and reverses the transition when deselected. Click the URL field to edit it;
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102 Enter navigates, Escape cancels, and standard Ctrl/Cmd clipboard and selection
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103 shortcuts work. Drag the remaining outer edge to move the view and drag the
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104 bottom-right handle to resize it. Embedded pages inherit the selected canvas
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105 light or dark color scheme where the browser backend supports it. Multiple web entities have independent
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106 browser instances, URLs, focus, input, and rendering. Browser resources are
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107 assigned only to visible entities, off-screen views are suspended, and the
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108 native CEF pool supports up to twelve live browsers. Small background views
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109 render at a reduced frame rate, larger views receive a moderate frame budget,
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110 and the focused view runs at 30 FPS so scenes with ten compact browsers remain
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111 responsive without giving every page the maximum rendering budget. Native
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112 browser viewport and texture resolution follow the displayed view size in
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113 64-pixel buckets, capped at 1280x800, so resized views become sharper without
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114 reallocating continuously during a drag.
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115
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116 The Lucide gallery is one scalable Raylib-rendered canvas entity rather than
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117 thousands of individual scene entities or an embedded browser. Reopening it
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118 reuses the existing entity and moves the camera back to its fitted bounds. Its
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119 ISC-licensed vector data is generated from Lucide 1.31.0 and the visible grid
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120 rows are drawn directly with Raylib primitives.
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121
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122 ## Spatial agent sessions
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123
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124 Authenticate the Copilot CLI once:
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125
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126 ```bash
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127 bazel run //mrjunejune:run_inference_stack -- --authenticate
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128 ```
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129
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130 Then start dictation, the Copilot LiteLLM gateway, and the canvas with one
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131 target:
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133 ```bash
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134 bazel run //infinite_canvas:orchestration_dev
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135 ```
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136
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137 `//infinite_canvas:agent_dev` remains an alias. Closing the canvas stops the
282
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138 supervised local services. The target selects the matching Copilot CLI and
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139 Python toolchain automatically. Dictation uses CUDA with `int8_float16` on
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140 Linux and CPU inference with `int8` on macOS.
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141
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142 Press `M` to start or stop the local WebRTC microphone session. The browser
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143 transport is prewarmed and remains hidden: it acquires the native microphone
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144 permission, device, signaling, ICE connection, and transcript data channel
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145 ahead of the first hotkey while keeping the audio track disabled. `M` therefore
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146 only unmutes an already-ready channel, so speech from the beginning of the
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147 utterance is retained. Partial and final speech appear directly as minimal centered text
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148 inside a retained `Dictation` text-area entity spawned near the camera center.
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149 The entity word-wraps, scrolls to the latest line, and can be dragged by its
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150 header to any position on the board. The same scratchpad is reused for every
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151 thought and clears after submission; it does not create duplicate dictation
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152 windows. A small pulsing `Listening` indicator
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153 remains in the bottom-left while capture is active. In-progress speech uses
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154 muted text; `Backspace` clears the entire current thought without stopping
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155 capture. Pausing with `M` and resuming appends to the same thought rather than
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156 replacing it. Press `Enter` to commit and send the current utterance while the
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157 microphone stays live for the next thought; press `M` or `Escape` to stop it.
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158 For typed input, select a text area and press `Ctrl/Cmd+Enter`.
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159 Native CEF grants audio only to the fixed loopback dictation transport; it does
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160 not show an inaccessible browser permission prompt or grant microphone access
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161 to normal canvas web entities.
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162
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163 The Copilot SDK receives the visible camera context, including existing
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164 conversation entity IDs, through the shared `canvas_orchestrator` prompt
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165 profile. It returns a routing decision to append to an existing session or
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166 create a new one. Requests run off the render thread through the shared
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167 `Inference_Bridge`. Conversation cards retain
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168 their own title, transcript, working state, scroll position, selection, and
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169 pinning state, forming the first rich-context container for future typed image
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170 and component resources. Runtime configuration and Copilot token paths come
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171 from the ignored `mrjunejune/.config`; no separate canvas environment file is
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172 required. The Dictation scratchpad is excluded from camera context because its
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173 text is submitted separately, and only visible conversation cards are eligible
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174 append targets. Conversation cards follow the latest appended message and can
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175 be collapsed from their header. The archive icon moves a session to the
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176 off-canvas parking lot, excluding it from context; `Parking lot (N)` in
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177 Developer Controls jumps there, and the restore icon returns the session to
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178 its previous board position. Collapse and expansion use the same eased retained
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179 animation model as accordion entities rather than snapping between heights.
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180 Canvas startup pre-creates only the persistent orchestration SDK session,
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181 moving its setup out of the first submitted thought without eagerly creating
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182 worker sessions.
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183
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184 Developer Controls can save and load named native `.zmap` snapshots. The
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185 versioned binary representation restores camera position, zoom, z-order, and
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186 retained entity state with checksum and bounds validation. Agents may also
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187 return a bounded `entities` array to showcase an answer directly with native
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188 calendar, card, table, text, image, or browser entities.
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189
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190 Agent submissions initially show only a small pulsing canvas icon. The
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191 orchestrator chooses `action` presentation for simple one-off work, replacing
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192 the icon with the result and creating no chat/session card, or `conversation`
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193 presentation for work that benefits from retained discussion. The icon has an
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194 animated hover label and can be dragged to choose the result location.
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195
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196 Tables support row selection, and notifications behave as bottom-right toast
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197 cards: multiple toasts overlap compactly, fan into a spaced stack on hover,
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198 and slide/fade away from either Undo or close. Position, size, stack expansion,
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199 and dismissal all use eased frame-rate-independent transitions. Scrollable areas consume the
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200 mouse wheel without zooming the camera. Image
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201 entities render HTTPS URLs or native filesystem paths through CEF; browser
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202 builds render URLs or paths available in the Emscripten filesystem. Override
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203 the demo image in native development with
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204 `INFINITE_CANVAS_IMAGE_SOURCE=/path/to/image.png`.
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205
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206 The first native build downloads the platform CEF 151 minimal distribution.
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207 Linux stages its runtime once under
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208 `~/.cache/zenbu/infinite-canvas/cef-151`; application state and the RGBA paint
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209 buffer remain owned by the Dowa arena, while CEF owns its browser internals.
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210
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211 Buttons animate on hover/press and toggle when clicked. Dropdowns open a real
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212 option menu with hover and selection states. Selected text areas accept typing,
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213 wrap text, support click/drag selection and scrolling, and provide
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214 Ctrl/Cmd+A/C/X/V clipboard shortcuts plus Shift selection, word navigation,
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215 Home/End, Backspace, and Delete. Drag a text area's narrow outer padding to
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216 move it without changing the selection.
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217
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218 Camera context is derived from the visible world rather than a hidden
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219 conversation store. Panning entities outside the viewport removes them;
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220 zooming out includes and concatenates newly visible entities. Each entry
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221 contains identity, type, placement, pin state, and type-specific state such as
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222 text content, dropdown selection, switch value, selected calendar date or table
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223 row, scroll position, image source, and browser URL. The current text format is
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224 intentionally provisional so it can later be replaced by the final API
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225 contract.
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226
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227 The prototype uses the Inter variable font under the SIL Open Font License.
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228
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229 Agent-oriented architecture and extension notes live in
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230 [`docs/README.md`](docs/README.md).
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231
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232 ## Memory ownership
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233
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234 The application creates one Dowa arena. Application state and the fixed-capacity
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235 entity array are arena-owned, there are no per-frame first-party allocations,
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236 and the arena is released once during native shutdown. Browser lifetime memory
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237 is reclaimed with the WebAssembly runtime when the page closes.