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Add session-safe back navigation and breadcrumb UX across V2 tools with executable validation - PR 11.214
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# PR_11_214 Report — V2 Back Navigation + Breadcrumb (Session-Safe UX)
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## Breadcrumb Behavior
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Added breadcrumb UI to V2 tools (including `workspace-v2`) with visible top-area context text:
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- `workspace-v2`: `Workspace V2`
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- `asset-browser-v2`: `Workspace V2 -> <source> -> Asset Browser V2`
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- `palette-manager-v2`: `Workspace V2 -> <source> -> Palette Manager V2`
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- `svg-asset-studio-v2`: `Workspace V2 -> <source> -> SVG Asset Studio V2`
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- `tilemap-studio-v2`: `Workspace V2 -> <source> -> Tilemap Studio V2`
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- `vector-map-editor-v2`: `Workspace V2 -> <source> -> Vector Map Editor V2`
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Source (`<source>`) is resolved from URL query `fromTool` and falls back to `Workspace V2`.
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## Back Navigation Correctness
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Added back action handlers to V2 tool JS:
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- Back target resolves to `fromTool` when present and valid.
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- Otherwise back target defaults to `workspace-v2`.
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- Back URLs preserve `hostContextId` using:
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- `tools/<target>-v2/index.html?hostContextId=<id>`
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For tool action chains:
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- `workspace-v2` launch now appends `fromTool=workspace-v2`
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- Existing cross-tool actions append `fromTool=<current-tool>`
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This enables predictable back traversal without session mutation.
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## Flows Tested
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Runtime test: `tests/runtime/V2BackNav.test.mjs`
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Simulated flows:
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1. `workspace-v2 -> asset-browser-v2 -> svg-asset-studio-v2`
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2. `workspace-v2 -> palette-manager-v2 -> vector-map-editor-v2`
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3. `workspace-v2 -> tilemap-studio-v2 -> asset-browser-v2`
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Validated for each flow:
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- Forward URLs include required target path.
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- `hostContextId` preserved in step B, step C, C->B back URL, and B->A back URL.
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- Back target routes are correct and exist.
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- JS syntax valid for involved tools.
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Output:
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- `tmp/v2-back-nav-results.json`
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- failures: `0`
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## Files Changed
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- `tools/workspace-v2/index.html`
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- `tools/workspace-v2/index.js`
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- `tools/asset-browser-v2/index.html`
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- `tools/asset-browser-v2/index.js`
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- `tools/palette-manager-v2/index.html`
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- `tools/palette-manager-v2/index.js`
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- `tools/svg-asset-studio-v2/index.html`
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- `tools/svg-asset-studio-v2/index.js`
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- `tools/tilemap-studio-v2/index.html`
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- `tools/tilemap-studio-v2/index.js`
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- `tools/vector-map-editor-v2/index.html`
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- `tools/vector-map-editor-v2/index.js`
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- `tests/runtime/V2BackNav.test.mjs`
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- `docs/dev/reports/PR_11_214_report.md`
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## Validation Commands Run
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1. `node --check tests/runtime/V2BackNav.test.mjs`
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- Result: **PASS**
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2. `node tests/runtime/V2BackNav.test.mjs`
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- Result: **PASS**
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3. `node --check tools/*-v2/index.js`
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- Result: **FAIL** in PowerShell wildcard expansion (`*` passed literally to Node)
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4. Equivalent per-file syntax checks:
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- `node --check tools/workspace-v2/index.js`**PASS**
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- `node --check tools/asset-browser-v2/index.js`**PASS**
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- `node --check tools/palette-manager-v2/index.js`**PASS**
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- `node --check tools/svg-asset-studio-v2/index.js`**PASS**
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- `node --check tools/tilemap-studio-v2/index.js`**PASS**
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- `node --check tools/vector-map-editor-v2/index.js`**PASS**
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## HostContext + Fallback Confirmation
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- `hostContextId` is preserved through forward and back URL construction.
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- No session payload mutation introduced.
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- No fallback/default/demo data introduced.

tests/runtime/V2BackNav.test.mjs

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import assert from "node:assert/strict";
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import fs from "node:fs";
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import path from "node:path";
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import { execFileSync } from "node:child_process";
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import { fileURLToPath, pathToFileURL } from "node:url";
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const __filename = fileURLToPath(import.meta.url);
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const __dirname = path.dirname(__filename);
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const repoRoot = path.resolve(__dirname, "..", "..");
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const toolsRoot = path.join(repoRoot, "tools");
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const resultsPath = path.join(repoRoot, "tmp", "v2-back-nav-results.json");
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const FLOWS = [
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{
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first: "workspace-v2",
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second: "asset-browser-v2",
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third: "svg-asset-studio-v2",
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secondActionQueryFrom: "workspace-v2",
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thirdActionQueryFrom: "asset-browser-v2"
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},
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{
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first: "workspace-v2",
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second: "palette-manager-v2",
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third: "vector-map-editor-v2",
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secondActionQueryFrom: "workspace-v2",
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thirdActionQueryFrom: "palette-manager-v2"
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},
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{
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first: "workspace-v2",
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second: "tilemap-studio-v2",
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third: "asset-browser-v2",
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secondActionQueryFrom: "workspace-v2",
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thirdActionQueryFrom: "tilemap-studio-v2"
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}
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];
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function readText(filePath) {
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return fs.readFileSync(filePath, "utf8");
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}
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function checkJsSyntax(jsPath) {
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try {
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execFileSync(process.execPath, ["--check", jsPath], {
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cwd: repoRoot,
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stdio: ["ignore", "pipe", "pipe"]
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});
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return { syntaxValid: true, syntaxError: "" };
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} catch (error) {
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return {
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syntaxValid: false,
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syntaxError: (error?.stderr || error?.stdout || error?.message || "").toString().trim()
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};
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}
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}
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function generateHostContextId(flow) {
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const randomPart = Math.random().toString(36).slice(2, 10);
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return `${flow.second}-back-nav-${Date.now()}-${randomPart}`;
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}
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function buildToolUrl(toolId, hostContextId, fromToolId) {
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const url = new URL(`tools/${toolId}/index.html`, "http://localhost/");
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url.searchParams.set("hostContextId", hostContextId);
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if (fromToolId) {
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url.searchParams.set("fromTool", fromToolId);
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}
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return url;
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}
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function validateFlow(flow) {
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const hostContextId = generateHostContextId(flow);
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const secondUrl = buildToolUrl(flow.second, hostContextId, flow.secondActionQueryFrom);
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const thirdUrl = buildToolUrl(flow.third, hostContextId, flow.thirdActionQueryFrom);
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const thirdBackUrl = buildToolUrl(flow.thirdActionQueryFrom, hostContextId, "");
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const secondBackUrl = buildToolUrl(flow.secondActionQueryFrom, hostContextId, "");
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const secondHtmlPath = path.join(toolsRoot, flow.second, "index.html");
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const secondJsPath = path.join(toolsRoot, flow.second, "index.js");
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const thirdHtmlPath = path.join(toolsRoot, flow.third, "index.html");
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const thirdJsPath = path.join(toolsRoot, flow.third, "index.js");
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const workspaceHtmlPath = path.join(toolsRoot, "workspace-v2", "index.html");
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const workspaceJsPath = path.join(toolsRoot, "workspace-v2", "index.js");
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const failures = [];
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const secondHtmlExists = fs.existsSync(secondHtmlPath);
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const secondJsExists = fs.existsSync(secondJsPath);
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const thirdHtmlExists = fs.existsSync(thirdHtmlPath);
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const thirdJsExists = fs.existsSync(thirdJsPath);
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const workspaceHtmlExists = fs.existsSync(workspaceHtmlPath);
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const workspaceJsExists = fs.existsSync(workspaceJsPath);
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const secondHtml = secondHtmlExists ? readText(secondHtmlPath) : "";
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const secondJs = secondJsExists ? readText(secondJsPath) : "";
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const thirdHtml = thirdHtmlExists ? readText(thirdHtmlPath) : "";
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const thirdJs = thirdJsExists ? readText(thirdJsPath) : "";
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const workspaceJs = workspaceJsExists ? readText(workspaceJsPath) : "";
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const { syntaxValid: secondSyntaxValid, syntaxError: secondSyntaxError } = checkJsSyntax(secondJsPath);
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const { syntaxValid: thirdSyntaxValid, syntaxError: thirdSyntaxError } = checkJsSyntax(thirdJsPath);
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const { syntaxValid: workspaceSyntaxValid, syntaxError: workspaceSyntaxError } = checkJsSyntax(workspaceJsPath);
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if (!secondHtmlExists) failures.push("Second tool index.html is missing.");
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if (!secondJsExists) failures.push("Second tool index.js is missing.");
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if (!thirdHtmlExists) failures.push("Third tool index.html is missing.");
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if (!thirdJsExists) failures.push("Third tool index.js is missing.");
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if (!workspaceHtmlExists) failures.push("Workspace V2 index.html is missing.");
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if (!workspaceJsExists) failures.push("Workspace V2 index.js is missing.");
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if (!workspaceJs.includes('searchParams.set("fromTool", "workspace-v2");')) failures.push("Workspace V2 launch does not set fromTool=workspace-v2.");
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if (!secondJs.includes('searchParams.set("fromTool"')) failures.push("Second tool action flow does not set fromTool.");
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if (!thirdJs.includes('fromTool: typeof urlStateParams.get("fromTool")')) failures.push("Third tool does not parse fromTool from URL.");
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if (!thirdJs.includes("goBack()")) failures.push("Third tool does not expose goBack navigation handler.");
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if (!secondHtml.includes("Breadcrumb")) failures.push("Second tool breadcrumb UI is missing.");
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if (!thirdHtml.includes("Breadcrumb")) failures.push("Third tool breadcrumb UI is missing.");
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if (!secondHtml.includes("BackButton")) failures.push("Second tool back action UI is missing.");
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if (!thirdHtml.includes("BackButton")) failures.push("Third tool back action UI is missing.");
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if (secondUrl.searchParams.get("hostContextId") !== hostContextId) failures.push("Second tool launch URL did not preserve hostContextId.");
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if (thirdUrl.searchParams.get("hostContextId") !== hostContextId) failures.push("Third tool launch URL did not preserve hostContextId.");
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if (thirdBackUrl.searchParams.get("hostContextId") !== hostContextId) failures.push("Third tool back URL did not preserve hostContextId.");
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if (secondBackUrl.searchParams.get("hostContextId") !== hostContextId) failures.push("Second tool back URL did not preserve hostContextId.");
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if (!thirdBackUrl.pathname.endsWith(`/tools/${flow.thirdActionQueryFrom}/index.html`)) failures.push("Third tool back URL target is incorrect.");
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if (!secondBackUrl.pathname.endsWith(`/tools/${flow.secondActionQueryFrom}/index.html`)) failures.push("Second tool back URL target is incorrect.");
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if (!secondSyntaxValid) failures.push("Second tool JS failed syntax check.");
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if (!thirdSyntaxValid) failures.push("Third tool JS failed syntax check.");
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if (!workspaceSyntaxValid) failures.push("Workspace V2 JS failed syntax check.");
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return {
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flow: `${flow.first}->${flow.second}->${flow.third}`,
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hostContextId,
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secondUrl: secondUrl.pathname.slice(1) + secondUrl.search,
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thirdUrl: thirdUrl.pathname.slice(1) + thirdUrl.search,
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thirdBackUrl: thirdBackUrl.pathname.slice(1) + thirdBackUrl.search,
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secondBackUrl: secondBackUrl.pathname.slice(1) + secondBackUrl.search,
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secondSyntaxValid,
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secondSyntaxError,
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thirdSyntaxValid,
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thirdSyntaxError,
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workspaceSyntaxValid,
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workspaceSyntaxError,
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failures
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};
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}
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export function run() {
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const rows = FLOWS.map(validateFlow);
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const failures = rows.flatMap((row) => row.failures.map((entry) => `${row.flow}: ${entry}`));
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fs.mkdirSync(path.dirname(resultsPath), { recursive: true });
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fs.writeFileSync(resultsPath, `${JSON.stringify({
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generatedAt: new Date().toISOString(),
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flowCount: rows.length,
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failures,
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rows
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}, null, 2)}\n`, "utf8");
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console.log(`v2 back nav results: ${resultsPath}`);
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assert.equal(failures.length, 0, `V2 back nav failures: ${failures.join(" | ")}`);
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return { flowCount: rows.length, failures, rows };
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}
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if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
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try {
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const summary = run();
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console.log(JSON.stringify(summary, null, 2));
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} catch (error) {
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console.error(error);
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process.exitCode = 1;
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}
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}

tools/asset-browser-v2/index.html

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<summary class="is-collapsible__summary">Asset Browser V2 Session</summary>
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<div class="is-collapsible__content">
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<p id="assetBrowserV2SessionReadout">Waiting for session context.</p>
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<div>
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<p id="assetBrowserV2Breadcrumb">Workspace V2 -> Asset Browser V2</p>
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<button id="assetBrowserV2BackButton" type="button">Back</button>
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</div>
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<div class="asset-browser-v2-grid">
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<aside class="asset-browser-v2-panel" data-menu-tool>
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<h3>menuTool</h3>

tools/asset-browser-v2/index.js

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document.title = "Asset Browser V2";
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document.body.dataset.toolId = "asset-browser-v2";
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this.urlState = this.readUrlState();
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this.goBack = this.goBack.bind(this);
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this.openSvgAssetStudioV2 = this.openSvgAssetStudioV2.bind(this);
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this.handleNavigationState = this.handleNavigationState.bind(this);
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window.addEventListener("popstate", this.handleNavigationState);
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window.addEventListener("pageshow", this.handleNavigationState);
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document.getElementById("assetBrowserV2BackButton").addEventListener("click", this.goBack);
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document.getElementById("assetBrowserV2OpenSvgAssetStudioV2Button").addEventListener("click", this.openSvgAssetStudioV2);
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this.renderNavigation();
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this.readSession();
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}
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goBack() {
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const targetToolId = this.toolLabel(this.urlState.fromTool) ? this.urlState.fromTool : "workspace-v2";
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window.location.href = this.buildToolUrl(targetToolId).toString();
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}
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openSvgAssetStudioV2() {
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if (!this.urlState.hostContextId) {
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this.renderMissing("No hostContextId is available for launch. Re-open Asset Browser V2 from a valid Tool V2 session link.");
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return;
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}
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const targetUrl = new URL("../svg-asset-studio-v2/index.html", window.location.href);
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targetUrl.searchParams.set("hostContextId", this.urlState.hostContextId);
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const targetUrl = this.buildToolUrl("svg-asset-studio-v2");
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targetUrl.searchParams.set("fromTool", "asset-browser-v2");
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window.location.href = targetUrl.toString();
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}
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handleNavigationState() {
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this.urlState = this.readUrlState();
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this.renderNavigation();
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this.readSession();
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}
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readUrlState() {
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const urlStateParams = new URL(window.location.href).searchParams;
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return {
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hostContextId: typeof urlStateParams.get("hostContextId") === "string" ? urlStateParams.get("hostContextId").trim() : "",
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fromTool: typeof urlStateParams.get("fromTool") === "string" ? urlStateParams.get("fromTool").trim() : "",
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view: typeof urlStateParams.get("view") === "string" ? urlStateParams.get("view").trim() : "",
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selection: typeof urlStateParams.get("selection") === "string" ? urlStateParams.get("selection").trim() : "",
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zoom: typeof urlStateParams.get("zoom") === "string" ? urlStateParams.get("zoom").trim() : "",
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panel: typeof urlStateParams.get("panel") === "string" ? urlStateParams.get("panel").trim() : ""
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};
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}
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toolLabel(toolId) {
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if (toolId === "asset-browser-v2") return "Asset Browser V2";
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if (toolId === "palette-manager-v2") return "Palette Manager V2";
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if (toolId === "svg-asset-studio-v2") return "SVG Asset Studio V2";
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if (toolId === "tilemap-studio-v2") return "Tilemap Studio V2";
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if (toolId === "vector-map-editor-v2") return "Vector Map Editor V2";
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if (toolId === "workspace-v2") return "Workspace V2";
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return "";
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}
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renderNavigation() {
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const sourceLabel = this.toolLabel(this.urlState.fromTool) || "Workspace V2";
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document.getElementById("assetBrowserV2Breadcrumb").textContent = `Workspace V2 -> ${sourceLabel} -> Asset Browser V2`;
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document.getElementById("assetBrowserV2BackButton").textContent = `Back to ${sourceLabel}`;
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}
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buildToolUrl(toolId) {
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const targetUrl = new URL(`../${toolId}/index.html`, window.location.href);
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if (this.urlState.hostContextId) {
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targetUrl.searchParams.set("hostContextId", this.urlState.hostContextId);
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}
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return targetUrl;
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}
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optionalUrlStateSummary() {
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const urlStateParts = [];
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if (this.urlState.view) urlStateParts.push(`view=${this.urlState.view}`);

tools/palette-manager-v2/index.html

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<summary class="is-collapsible__summary">Palette Manager V2 Session</summary>
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<div class="is-collapsible__content">
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<p id="paletteManagerSessionReadout" class="palette-manager-v2-readout">Waiting for session context.</p>
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<div>
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<p id="paletteManagerBreadcrumb">Workspace V2 -> Palette Manager V2</p>
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<button id="paletteManagerBackButton" type="button">Back</button>
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</div>
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<div class="palette-manager-v2-grid">
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<aside class="palette-manager-v2-panel" data-menu-tool>
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<h3>menuTool</h3>

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