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| 1 | +# BUILD_PR_LEVEL_20_21_REPAIR_WORKSPACE_MOUNT_CONTAINER_PAGER Validation |
| 2 | + |
| 3 | +## Changed Files |
| 4 | +- `tools/Workspace Manager/main.js` |
| 5 | +- `tools/Workspace Manager/toolHost.css` |
| 6 | +- `docs/dev/reports/workspace_manager_mount_container_pager_validation.md` |
| 7 | + |
| 8 | +## Proof data-tool-host-mount-container Is Found |
| 9 | +- Shell mount container exists in host page: |
| 10 | + - `tools/Workspace Manager/index.html:17` `<div data-tool-host-mount-container class="tool-host-workspace__mount"></div>` |
| 11 | +- Runtime ref is resolved from DOM: |
| 12 | + - `tools/Workspace Manager/main.js:96` `mountContainer: document.querySelector("[data-tool-host-mount-container]")` |
| 13 | + |
| 14 | +## Proof Valid Game-Launched URL Mounts Selected Tool Content Into Container |
| 15 | +For `tools/Workspace Manager/index.html?gameId=Breakout&mount=game`: |
| 16 | +- Explicit `gameId` parsing: |
| 17 | + - `tools/Workspace Manager/main.js:300` `const gameId = (url.searchParams.get("gameId") || "").trim();` |
| 18 | +- `init()` computes first tool for game-launched context: |
| 19 | + - `tools/Workspace Manager/main.js:735` `const initialToolId = requestedToolId || (initialGameEntry && gameLaunchRequested ? (toolIds[0] || "") : "");` |
| 20 | +- `init()` mounts selected tool: |
| 21 | + - `tools/Workspace Manager/main.js:767` `if (!mountSelectedTool("init")) {` |
| 22 | +- Mount writes iframe into mount container: |
| 23 | + - `tools/shared/toolHostRuntime.js:169` `mountContainer.replaceChildren(frame);` |
| 24 | + |
| 25 | +## Proof First Available Tool Is Selected On Load |
| 26 | +- Game-launched selection uses first filtered tool id when no `tool` query is provided: |
| 27 | + - `tools/Workspace Manager/main.js:735` `... ? (toolIds[0] || "") : "")` |
| 28 | + |
| 29 | +## Proof First Available Tool Is Mounted On Load |
| 30 | +- Initial selection path calls mount: |
| 31 | + - `tools/Workspace Manager/main.js:767` `if (!mountSelectedTool("init")) {` |
| 32 | +- Mount path invokes runtime mount API: |
| 33 | + - `tools/Workspace Manager/main.js:547` `const mountResult = runtime.mountTool(toolId, {` |
| 34 | + |
| 35 | +## Proof Prev/Next Changes Current Label |
| 36 | +- Prev/Next handlers mount newly selected tool: |
| 37 | + - `tools/Workspace Manager/main.js:595` `mountSelectedTool("prev");` |
| 38 | + - `tools/Workspace Manager/main.js:604` `mountSelectedTool("next");` |
| 39 | +- Label updates on successful mount: |
| 40 | + - `tools/Workspace Manager/main.js:506` `setCurrentLabel(tool.displayName);` |
| 41 | + |
| 42 | +## Proof Prev/Next Remounts Selected Tool Into Mount Container |
| 43 | +- Prev/Next call `mountSelectedTool(...)` (lines above). |
| 44 | +- `mountSelectedTool` calls runtime mount: |
| 45 | + - `tools/Workspace Manager/main.js:547` `const mountResult = runtime.mountTool(toolId, {` |
| 46 | +- Runtime replaces container children with selected tool iframe: |
| 47 | + - `tools/shared/toolHostRuntime.js:169` `mountContainer.replaceChildren(frame);` |
| 48 | + |
| 49 | +## Proof Blank Mount Container Cannot Occur Silently |
| 50 | +Failure/empty states now render explicit diagnostic panel in mount container: |
| 51 | +- Diagnostic renderer: |
| 52 | + - `tools/Workspace Manager/main.js:196` `function renderMountDiagnostic(message, detail = "") {` |
| 53 | + - `tools/Workspace Manager/main.js:213` `refs.mountContainer.replaceChildren(panelNode);` |
| 54 | +- No selected tool: |
| 55 | + - `tools/Workspace Manager/main.js:520` `renderMountDiagnostic("No tool is selected for mount.", ...)` |
| 56 | +- No tools for game context: |
| 57 | + - `tools/Workspace Manager/main.js:654` `renderMountDiagnostic("No active tools are available for this game context.", ...)` |
| 58 | + - `tools/Workspace Manager/main.js:745` `renderMountDiagnostic("No active tools are available for this game context.", ...)` |
| 59 | +- Invalid/missing game context: |
| 60 | + - `tools/Workspace Manager/main.js:628`, `639`, `703`, `715` |
| 61 | + |
| 62 | +## Proof Visible Diagnostic Appears Inside Mount Container On Mount Failure |
| 63 | +- Synchronous mount failure path: |
| 64 | + - `tools/Workspace Manager/main.js:558` `if (!mountResult || !(mountResult.frame instanceof HTMLIFrameElement)) {` |
| 65 | + - `tools/Workspace Manager/main.js:562` `renderMountDiagnostic(` |
| 66 | +- Frame load failure path: |
| 67 | + - `tools/Workspace Manager/main.js:569` `mountResult.frame.addEventListener("error", () => {` |
| 68 | + - `tools/Workspace Manager/main.js:573` `renderMountDiagnostic(` |
| 69 | +- Diagnostic panel has visible styling in mount surface: |
| 70 | + - `tools/Workspace Manager/toolHost.css:35` `.tool-host-mount-diagnostic {` |
| 71 | + - `tools/Workspace Manager/toolHost.css:39` `border: 1px solid #a73a3a;` |
| 72 | + |
| 73 | +## Proof gameId || game Fallback Not Restored |
| 74 | +- Check result: `NOT_FOUND gameId || game` |
| 75 | +- Check result: `NOT_FOUND searchParams.get("game")` |
| 76 | +- Check result: `NOT_FOUND searchParams.get('game')` |
| 77 | + |
| 78 | +## Proof Samples Remain Untouched |
| 79 | +- Check result: `SAMPLES_UNCHANGED` |
| 80 | +- Based on `git diff --name-only -- samples` output. |
| 81 | + |
| 82 | +## Additional Layout Fix For Non-Blank Mount Surface |
| 83 | +- Host workspace now has explicit full-size dimensions to prevent mount-area collapse: |
| 84 | + - `tools/Workspace Manager/toolHost.css:14` `.tool-host-workspace {` |
| 85 | + - `tools/Workspace Manager/toolHost.css:15` `width: 100%;` |
| 86 | + - `tools/Workspace Manager/toolHost.css:16` `height: 100%;` |
| 87 | + |
| 88 | +## Anti-Pattern Self-Check |
| 89 | +- No `gameId || game` or legacy `game` fallback restored: PASS |
| 90 | +- No hidden fallback routing introduced: PASS |
| 91 | +- No stale memory reuse changes introduced: PASS |
| 92 | +- No dropdown + Select Tool + Mount workflow restored: PASS |
| 93 | +- No samples changes: PASS |
| 94 | +- No new header/banner or pager relocation: PASS |
| 95 | +- Scope remained targeted to requested files: PASS |
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