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DavidQ
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Fix undo last merge enable state to reflect actual availability - PR 11.260
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# PR_11_260 Undo Enable State Fix Report
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## Scope
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Workspace V2 Session Merge UI state only.
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## Files Changed
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- tools/workspace-v2/index.js
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- tests/runtime/V2UndoEnableStateActualAvailability.test.mjs
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## Implementation Summary
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- Updated `updateUndoLastMergeState()` to enforce actual undo availability.
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- Undo is now enabled only when all are true:
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- `lastMergedHostContextId` is set
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- matching `lastMergedHostContextId` exists in `sessionStorage`
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- matching `lastMergedHostContextId` exists in Recent Sessions (`v2-session-history`)
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- Added stale-ID cleanup:
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- if any availability condition fails for a non-empty `lastMergedHostContextId`, it is cleared via `writeLastMergedHostContextId("")`
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- Undo is disabled immediately
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- Added debug-safe diagnostic for mismatch (non-user-visible):
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- `console.debug("[WorkspaceV2UndoLastMerge] stale_last_merged_context", { ... })`
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- Existing merge/apply/undo flow behavior remains intact:
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- Apply sets `lastMergedHostContextId`, registers recent entry, and enables Undo when valid
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- Undo removes merged session, clears `lastMergedHostContextId`, and disables Undo
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## Validation Commands
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1. `node --check tools/workspace-v2/index.js`
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- Result: PASS
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2. `node --check tests/runtime/V2UndoEnableStateActualAvailability.test.mjs`
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- Result: PASS
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3. `node tests/runtime/V2UndoEnableStateActualAvailability.test.mjs`
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- Result: PASS
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- Output: `tmp/v2-undo-enable-state-actual-availability-results.json`
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- Failures: `[]`
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## Executable Validation Coverage
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- Undo disabled on initial load
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- Undo enabled immediately after Apply Merge
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- Undo disabled immediately after Undo execution
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- Undo disabled if merged recent session is manually deleted
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- Undo disabled if `lastMergedHostContextId` is stale (missing sessionStorage entry)
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- Undo state remains correct after refresh-style recomputation
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## Full Samples Smoke Decision
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- Skipped full samples smoke test.
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- Reason: this PR only changes Workspace V2 Undo enable-state gating and adds a focused runtime test. No shared sample infrastructure changes were made.
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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 jsPath = path.join(repoRoot, "tools", "workspace-v2", "index.js");
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const resultsPath = path.join(repoRoot, "tmp", "v2-undo-enable-state-actual-availability-results.json");
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function checkSyntax(filePath) {
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try {
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execFileSync(process.execPath, ["--check", filePath], {
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cwd: repoRoot,
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stdio: ["ignore", "pipe", "pipe"]
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});
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return { ok: true, error: "" };
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} catch (error) {
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return { ok: false, error: (error?.stderr || error?.stdout || error?.message || "").toString().trim() };
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}
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}
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function computeUndoAvailability(lastMergedHostContextId, recent, sessionStorageMap) {
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const mergedHostContextId = typeof lastMergedHostContextId === "string" ? lastMergedHostContextId.trim() : "";
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if (!mergedHostContextId) {
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return { enabled: false, cleared: true, reason: "missing-lastMergedHostContextId", nextLastMergedHostContextId: "" };
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}
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const existsInRecent = recent.some((entry) => entry.hostContextId === mergedHostContextId);
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const existsInSessionStorage = Object.prototype.hasOwnProperty.call(sessionStorageMap, mergedHostContextId);
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const enabled = Boolean(mergedHostContextId && existsInRecent && existsInSessionStorage);
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if (!enabled) {
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return {
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enabled: false,
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cleared: true,
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reason: "stale-lastMergedHostContextId",
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nextLastMergedHostContextId: "",
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diagnostics: { existsInRecent, existsInSessionStorage }
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};
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}
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return { enabled: true, cleared: false, reason: "available", nextLastMergedHostContextId: mergedHostContextId };
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}
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export function run() {
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const failures = [];
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const jsExists = fs.existsSync(jsPath);
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const js = jsExists ? fs.readFileSync(jsPath, "utf8") : "";
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const jsSyntax = checkSyntax(jsPath);
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const testSyntax = checkSyntax(path.join(repoRoot, "tests", "runtime", "V2UndoEnableStateActualAvailability.test.mjs"));
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if (!jsExists) failures.push("Missing tools/workspace-v2/index.js.");
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if (!jsSyntax.ok) failures.push("tools/workspace-v2/index.js failed syntax check.");
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if (!testSyntax.ok) failures.push("tests/runtime/V2UndoEnableStateActualAvailability.test.mjs failed syntax check.");
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const requiredTokens = [
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"const existsInRecent = history.some((entry) => entry.hostContextId === mergedHostContextId);",
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"const existsInSessionStorage = typeof sessionStorage.getItem(mergedHostContextId) === \"string\";",
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"console.debug(\"[WorkspaceV2UndoLastMerge] stale_last_merged_context\", {",
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"this.writeLastMergedHostContextId(\"\");",
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"this.undoLastMergeButton.disabled = !hasRecentMerged;"
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];
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requiredTokens.forEach((token) => {
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if (!js.includes(token)) failures.push(`Missing undo-availability token/text: ${token}`);
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});
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const mergedId = "asset-browser-v2-merged-1777777777777-abcd1234";
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const recent = [{ hostContextId: mergedId }, { hostContextId: "asset-browser-v2-regular" }];
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const storageMap = {
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[mergedId]: "{\"version\":\"v2\",\"toolId\":\"asset-browser-v2\"}",
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"asset-browser-v2-regular": "{\"version\":\"v2\",\"toolId\":\"asset-browser-v2\"}"
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};
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const initialLoad = computeUndoAvailability("", recent, storageMap);
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if (initialLoad.enabled) failures.push("Undo must be disabled on initial load with no last merge.");
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const afterApply = computeUndoAvailability(mergedId, recent, storageMap);
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if (!afterApply.enabled) failures.push("Undo must be enabled immediately after apply when recent+storage are present.");
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const afterUndo = computeUndoAvailability("", recent.filter((entry) => entry.hostContextId !== mergedId), {
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"asset-browser-v2-regular": "{\"version\":\"v2\",\"toolId\":\"asset-browser-v2\"}"
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});
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if (afterUndo.enabled) failures.push("Undo must be disabled immediately after undo clears last merge.");
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const manualDelete = computeUndoAvailability(mergedId, recent.filter((entry) => entry.hostContextId !== mergedId), storageMap);
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if (manualDelete.enabled) failures.push("Undo must be disabled if merged recent session is deleted.");
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if (manualDelete.nextLastMergedHostContextId !== "") failures.push("Stale last merged id should be cleared when recent entry is missing.");
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const staleStorage = computeUndoAvailability(mergedId, recent, {
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"asset-browser-v2-regular": "{\"version\":\"v2\",\"toolId\":\"asset-browser-v2\"}"
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});
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if (staleStorage.enabled) failures.push("Undo must be disabled if merged session payload is missing from sessionStorage.");
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if (staleStorage.nextLastMergedHostContextId !== "") failures.push("Stale last merged id should be cleared when storage entry is missing.");
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const refreshRecompute = computeUndoAvailability(staleStorage.nextLastMergedHostContextId, recent, storageMap);
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if (refreshRecompute.enabled) failures.push("Undo must remain disabled on refresh after stale id clear.");
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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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failures,
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checks: { jsExists, jsSyntax, testSyntax },
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scenarios: { initialLoad, afterApply, afterUndo, manualDelete, staleStorage, refreshRecompute }
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}, null, 2)}\n`, "utf8");
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console.log(`v2 undo-enable-state-actual-availability results: ${resultsPath}`);
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assert.equal(failures.length, 0, `V2 undo-enable-state-actual-availability failures: ${failures.join(" | ")}`);
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return { failures };
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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/workspace-v2/index.js

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Original file line numberDiff line numberDiff line change
@@ -314,11 +314,25 @@ class WorkspaceV2SessionProducer {
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}
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updateUndoLastMergeState() {
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const mergedHostContextId = typeof this.lastMergedHostContextId === "string"
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? this.lastMergedHostContextId.trim()
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: "";
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if (!mergedHostContextId) {
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this.undoLastMergeButton.disabled = true;
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return;
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}
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const history = this.readSessionHistory();
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const hasRecentMerged = Boolean(
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this.lastMergedHostContextId &&
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history.some((entry) => entry.hostContextId === this.lastMergedHostContextId)
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);
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const existsInRecent = history.some((entry) => entry.hostContextId === mergedHostContextId);
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const existsInSessionStorage = typeof sessionStorage.getItem(mergedHostContextId) === "string";
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const hasRecentMerged = Boolean(mergedHostContextId && existsInRecent && existsInSessionStorage);
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if (!hasRecentMerged) {
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console.debug("[WorkspaceV2UndoLastMerge] stale_last_merged_context", {
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lastMergedHostContextId: mergedHostContextId,
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existsInRecent,
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existsInSessionStorage
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});
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this.writeLastMergedHostContextId("");
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}
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this.undoLastMergeButton.disabled = !hasRecentMerged;
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}
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