# Tasks

The 60 tasks of DevBrowse Bench v1 (`suites/v1.txt`). Prompts are the tickets in `tasks/` (Team Tasks) and `tasks/real-projects.ts`; `tasks/descriptions.json` has the summaries below, and `analysis/export-tasks.ts` exports everything as one JSON line per task.

## Prompt

Team Tasks, first round (later rounds are sent in the same conversation as `<round text> Check it in the browser again before you finish.`):

```
This folder is the frontend of Team Tasks, a React + Vite app. Its dev server is already running at <url> with hot reload. It talks to the team's API through /api; the API is run by another team, is not in this folder and can't be changed (API.md describes it). Do not start servers or install packages.

<ticket>

Check the result yourself in a browser before you finish — <tool sentence>
```

Real projects:

```
<what this repository is> Dependencies are installed and the app's dev server is already running at <url> with hot reload. Do not start servers or install packages.

<ticket>

Check the result yourself in a browser before you finish — <tool sentence>
```

The tool sentence is the only difference between the two sides:

- ChatGPT Computer Use: ``use Codex's built-in browser (the Browser plugin's in-app browser). Do not use the `cu` MCP server.``
- Mirasim Computer Use: ``use the `cu` MCP server's computer_repl tool (it drives a browser). Do not use Codex's built-in browser or Chrome.``

## Browser actions

Each task is tagged with the browser actions its verification needs; the report breaks results down by action.

| Action | Meaning |
|---|---|
| read | Read text and state on the page |
| look | Look at the rendering: layout, style, colour, size |
| click-hit | Click where hit testing matters (covered, transparent or stretched click targets) |
| keys | Keyboard: Tab, Escape, Enter, shortcuts, arrow keys |
| hover | Things that only appear on hover |
| scroll | Page and in-container scrolling |
| drag | Drag and drop |
| resize | Change the window width |
| history | Reload, back and forward, edit the URL |
| wait | Slow responses, loading and failure states |
| devtools | Console and network requests |
| canvas | Canvas apps operated by coordinates only |
| upload | Choose a file to upload |
| dialog | Native confirm / alert dialogs |
| tab | New tabs or pop-ups |
| iframe | Content inside an iframe |
| clipboard | Clipboard |
| download | File downloads |

## Task list

### Team Tasks · classic

20 tasks on Team Tasks, the simulated project (`apps/team-tasks/`): multi-round features, cross-page changes, regressions, async bugs and QA passes.

**assignee** · Task assignees with Assigned-to-me filter · feature · multi · read, keys · 3 runs, 3 rounds

Seed: none Judge: A three-round feature. Assigns members through the Edit dialog's Assignee control and requires the row to show the member's initials with the full name on hover (title/aria-label, hover text or CSS tooltip) and the assignee saved in the mock API. The 'Assigned to me' filter must list exactly the current user's tasks with a count of (2); choosing Unassigned must clear the assignee in the API and on the row. After removing a member in Settings, their initials must disappear from the list (also after reload) and the Edit dialog must not show them as assignee.

**due-dates** · Due dates with Overdue and Due today · feature · multi · read, look · 3 runs, 2 rounds

Seed: none Judge: Sets due dates of yesterday, today and five days ahead in the Edit dialog. In both the task list and Board cards, yesterday's task must say 'Overdue' in a red colour (computed colour sampled as pixels), today's must say 'Due today' and not Overdue, the future one must show its date, and a task without a date must show none. A second browser context in the America/Los_Angeles time zone must show the same calendar day, and clearing the date in the Edit dialog must remove it after reload.

**bulk-actions** · Bulk select, mark done, delete with Undo · feature · multi · read, dialog · 3 runs, 3 rounds

Seed: none Judge: A three-round feature. Selecting two rows (one already done) must show '2 selected'; Mark selected done must save both and show a message, and Undo must restore each task's previous state. Switching filters must clear the selection; cancelling the Delete selected confirmation (native or in-app) must delete nothing, confirming must remove both rows with a '2 tasks deleted' message and Undo must bring them back persistently after reload. A bulk delete without Undo must reach the mock API (hard or soft delete) within the undo window and stay gone after reload.

**comments** · Task comments with counts · feature · cross · read · 3 runs, 1 round

Seed: none Judge: On a task's detail page, existing comments must be listed with author name, text and a date (text date or <time>). Posting a comment must show it, and without a reload the task list row must show '3 comments' (any phrasing that puts the number next to 'comment', or an aria-label/title), another row 1 comment, and the Board card 3 comments.

**shared-modal** · One shared accessible Modal component · refactor · regression · keys · 3 runs, 1 round

Seed: none Judge: For the Edit task dialog, the Invite dialog and the Remove member confirmation, Escape and a click outside must each close the dialog and return focus to the opening button; on open, focus must be inside the dialog and 8 Tab and 8 Shift+Tab presses must not leave it (a native modal <dialog> counts). The dialogs must still work: editing saves the title, invite shows the API's validation error and then sends a valid invite, Remove deletes the member, and task deletion still uses the browser's native confirm and deletes the task.

**task-status** · Replace done flag with three-state status · refactor · regression · read · 3 runs, 1 round

Seed: none Judge: With saving one specific task failing with HTTP 500, requires filter counts All (10) / Active (7) / Done (3) from existing data. Setting In progress on a task's detail page must save status 'in_progress' and, after in-app navigation without a reload, the Board must have To do / In progress / Done columns with the task in In progress, while the list shows it unchecked and under Active. Ticking and unticking list checkboxes must save 'done' and 'todo', a failed save must roll the checkbox back, and a newly added task must be saved as 'todo' and appear in the Board's To do column.

**double-submit** · Prevent duplicate task creation · bug fix · async · wait · 3 runs, 1 round

Seed: Plants the bug: removes the in-flight guard and the disabled state from the add-task form's submit button. Judge: With task creation delayed 900ms in the mock API, a fast double click on Add task, pressing Enter twice, and a second click 0.5s later while the request is still in flight must each create exactly one task in the API. The title field must be cleared after adding and the list must show the task once.

**failed-toggle** · Failed done-toggle must roll back · bug fix · async · wait · 3 runs, 1 round

Seed: Plants the bug: the optimistic done-toggle no longer reverts or shows an error when the save fails. Judge: With saves for two specific tasks failing with HTTP 503, ticking one in the task list must leave the checkbox unticked after the failure and show an error message, while a normal tick still saves and shows done. On the Board, Mark done on the other failing task must leave the card in To do and show a new error message; done cards must keep Reopen and cards must not gain the list's checkbox.

**qa-members-error** · QA pass: member list silently empty · QA report · qa · wait · 3 runs, 1 round

Seed: Plants the bug: the Settings page drops its error message for the member list, so when the members API fails it shows 'No members yet.' (the agent's backend returns HTTP 500 for the member list). Judge: The agent writes qa-report.md without changing code; the report is split into entries and matched with rule-based regular expressions, no LLM. A non-negated sentence must say 'No members yet', or say the member list is empty/blank/fails to load/returns 500/hides the error while referring to the members list; mentions of inviting or removing members and the header's 'N members' count are stripped before matching.

**url-state** · Task list view state in URL · feature · multi · history · 3 runs, 3 rounds

Seed: none Judge: A three-round feature. With Active, Priority sort and search 're' set, the URL must change and a reload must restore the same filter, search, sort and rows. Back must undo the last sort change and then the filter change one step at a time, and typing 'rel' letter by letter must not create one history entry per keystroke. /board?q=LEASE must show only the two cards matching case-insensitively mid-word, /board?q=rel exactly three, and a Clear search link must show all 10 cards.

**inline-rename** · Inline rename in list and Board · feature · multi · keys · 3 runs, 3 rounds

Seed: none Judge: A three-round feature tested on both list rows and Board cards. Rename must open a focused field holding the current title; Enter saves the new title to the mock API and shows it, Escape cancels. An all-spaces title must not be saved, the field must stay open and some reason must appear (new on-page text, a native dialog or a browser validation message); a padded title must be saved trimmed.

**invite-admin** · Revoke invites, block duplicates, nav count · feature · multi · read · 3 runs, 3 rounds

Seed: none Judge: A three-round feature. The Settings nav link must read just 'Settings' with no pending invites and 'Settings (2)' (or 'Settings 2') after sending two invites, also after reopening the app on another page. Revoke must ask for confirmation first (declining keeps the invite), then delete it in the mock API and update the count to 1. Inviting an existing member's or pending invitee's email in different letter case must show an 'already…' message and create no invite.

**checklist** · Task checklists with progress · feature · cross · read · 3 runs, 1 round

Seed: none Judge: Adds three checklist items on a task's detail page, ticks one and removes another, and requires the checklist saved on the task in the mock API. Without a reload (in-app navigation), the list row and Board card must show '1/2' (or '1 of 2') and tasks without a checklist must show no progress; after a full reload the ticked item must still be ticked and the progress still shown.

**related-tasks** · Two-way related task links · feature · cross · read · 3 runs, 1 round

Seed: none Judge: On a task's page, the 'Link a task' picker must not list the task itself; linking another task must list it under related tasks as a link that opens it. After clearing localStorage/sessionStorage and reloading (so only the mock API counts), the other task must list the first one; Unlink there must remove the link from both sides.

**shared-task-card** · Shared task card for list and Board · refactor · regression · read · 3 runs, 1 round

Seed: none Judge: List rows must still complete via checkbox, edit and save, keep Delete (with a confirmation that can be declined) and not gain Mark done/Reopen. Board cards must gain working Edit and Delete (Delete must confirm first), keep a working Star button, keep Reopen on done cards and Mark done that moves a card to Done, and must not gain the list's checkbox; all changes are verified in the mock API.

**settings-tabs** · Split Settings into Members/Invites tabs · refactor · regression · history · 3 runs, 1 round

Seed: none Judge: Opening Settings must show the Members tab at /settings/members (or /settings), where removing a member and sending an invite still work but pending invites are not listed. The Invites tab must be at /settings/invites, list the pending invite and not the members; both URLs must work when opened directly, and the main Settings nav link must be marked active (class or aria-current) on a tab.

**load-retry** · Load error state with Retry · bug fix · async · wait · 3 runs, 1 round

Seed: none Judge: With the mock API's task list failing with HTTP 503, requires an error message or Retry button and no 'no tasks' text. Clicking Retry while the API still fails must not reload the page and must keep showing the error without claiming there are no tasks; after the failure is lifted, Retry must load all 10 tasks without a page reload and the error must disappear.

**qa-board-count** · QA pass: wrong Board column counts · QA report · qa · read · 3 runs, 1 round

Seed: Plants the bug: each Board column header shows the total number of tasks instead of the number of cards in that column. Judge: The agent writes qa-report.md without changing code; the report is split into entries and matched with rule-based regular expressions, no LLM. An entry must mention the Board and a column/header, and a non-negated sentence must either pair the total (10/11) with the actual column card count (7/3/4), or state the header count is the total while the column figure appears in the same entry, or say the count is wrong/mismatched/the overall total/not updated.

**qa-priority-ignored** · QA pass: new task priority ignored · QA report · qa · read · 3 runs, 1 round

Seed: Plants the bug: creating a task sends only the title to the mock API, so every new task is saved as medium priority regardless of the choice. Judge: The agent writes qa-report.md without changing code; the report is split into entries and matched with rule-based regular expressions, no LLM. An entry must mention creating/adding a new task and its priority (priority/high/low), and a non-negated sentence must say the result shows or is saved as medium, or that the chosen priority is ignored, not saved, has no effect or defaults/resets.

**undo-delete** · Undo after deleting a task · feature · small · wait · 3 runs, 1 round

Seed: none Judge: Deleting a task from its row (accepting the native confirm) must remove it and show 'Task deleted' with Undo; Undo must restore it with the same priority, done state and description, persisting after reload. The same must work from the task's detail page. A delete without Undo must reach the mock API within 20 seconds, the message must disappear on its own, and the task must stay gone after reload.

### Team Tasks · extended

24 more tasks on Team Tasks: layout, UI, complex controls, browser features, navigation, auth, payments, debugging and three long features.

**narrow-nav** · Mobile navigation drawer behind Menu button · feature · layout · resize, look · 3 runs, 1 round

Seed: Removes the narrow-screen navigation drawer: the sidebar stays a fixed left column at every width and the header has no Menu button. Judge: At a 390x844 viewport, requires no horizontal page scroll on the Tasks, Board, Inbox and Settings pages, the task list to be at least 330px wide, and the navigation links hidden until a Menu button is pressed. After opening the menu, Tasks, Inbox, Board and Settings links must be fully visible and clickable; picking Board must navigate there and close the menu so the To do column is visible. At 1200px wide the sidebar must still show the links on the left without a menu and the Menu button must not appear.

**dark-mode** · Dark mode follows system, persists, Inbox dark · feature · layout · look, history · 3 runs, 2 rounds

Seed: Reverts the theme to a session-only toggle: always opens light, ignores the system setting, does not save the choice, has no pre-paint theme script, and the Inbox is left out of the dark theme styles. Judge: Opens with the browser's colour scheme set to dark and requires the app to start dark (and a separate light-scheme context to start light), measuring the header's actual text and background luminance. Picking light via the page's theme control must survive a reload and a new tab; with the system switched to light, picking dark must persist across a visit. In dark mode on an open Inbox task, headings, list titles, description, comments and the Attachments heading must sit on a dark background with at least 4.5:1 contrast, and secondary text (priority badges, counts, labels, comment author/time, attachment size) at least 3:1.

**scroll-tail** · Comment thread cuts off newest comment · bug fix · layout · scroll · 3 runs, 1 round

Seed: Plants the bug: wraps the Inbox comment thread in a fixed 320px overflow-hidden box that also contains the heading, while the scrolling list is 100% tall, so its bottom ~30px is clipped. Judge: With a long-thread fixture, opens the long task in the Inbox and checks all expected comments exist. Scrolling the comment list down with the mouse wheel must leave the newest comment fully visible and uncovered, scrolling up must fully show the oldest; after posting a new comment it must be fully visible (directly or after wheel-scrolling down).

**mention-trim** · Simplify @mention list rows · feature · ui · look, keys · 3 runs, 1 round

Seed: none Judge: Adds a member with a very long name through the mock API, then types '@' in an Inbox comment box. The popup must list all team members with avatars, no email addresses or member IDs, and rows spanning the popup width; filtering to the long name must show it on one line, uncut and inside the popup. Keyboard behaviour must still work: ArrowDown/ArrowDown/ArrowUp+Enter inserts the second name, Tab picks the filtered match, and Escape closes the list while keeping focus in the comment box.

**type-scale** · Three-size type scale on Board and Inbox · feature · ui · look · 3 runs, 1 round

Seed: none Judge: Reads computed font sizes. On Board cards and in Inbox rows and the task pane, every visible text must be exactly 14, 13 or 12px, with specific elements checked against the spec (titles, description, comment text 14px; labels, sizes, paths, authors, buttons and links 13px; priority badges, the Done marker and timestamps 12px). Elements that were to stay unchanged are checked too: avatar initials 11px, Board column headings 15px, the pane title 16px with 15px Edit/Copy link, the list's 15px filters, the 13px task count, and the Tasks page titles at 15px.

**board-dnd** · Board drag-and-drop does not save; failed moves stick · bug fix · controls · drag, wait · 3 runs, 2 rounds

Seed: Plants two bugs: the dragged card no longer has pointer-events disabled (so the drop lands on the card itself and snaps back), and a failed save never clears the card's pending state so it stays in the dropped column. Judge: With task saves delayed 600ms and saving one specific task always failing with HTTP 500, drags cards with real mouse events. Dropping on the same column must change nothing; To do -> Done and Done -> To do drags must persist in the mock API and show the card in the new column. A drag whose save fails must show an error and return the card to its original column without changing the API, after which the same card must drag successfully once the failure is lifted; a failing Done -> To do move must likewise revert, and clicking a card must still open the task.

**assignee-combo** · Searchable assignee combobox · feature · controls · keys · 3 runs, 1 round

Seed: none Judge: On a task's edit page, requires the Assignee field to be a combobox rather than a native select. Typing part of a surname must narrow the options; arrow keys plus Enter must pick the highlighted option without submitting the form and close the list; Escape on a new search must close the list without changing the choice; Unassigned must be selectable. Saving must store the right assignee in the mock API, the highlighted option must be exposed to screen readers (aria-activedescendant, focus or aria-selected), arrow keys must actually move the highlight, and clicking an option must work.

**due-off-by-one** · Due date saved one day early · bug fix · controls · read · 3 runs, 1 round

Seed: Plants the bug: the edit page converts the picked due date through a local-midnight Date and toISOString(), shifting it back a day in time zones east of UTC. Judge: Runs in fresh browser contexts with the Asia/Shanghai and America/Los_Angeles time zones. In each, sets a due date on the edit page, requires the mock API to store that exact day, the task view to show that day (and not the neighbouring day), the edit page to show the same value when reopened, and re-saving after editing only Notes to leave the date unchanged.

**infinite-dup** · Inbox infinite scroll duplicates tasks · bug fix · controls · scroll, wait · 3 runs, 1 round

Seed: Plants the bug: removes the in-flight guard and de-duplication from the Inbox's paged loader, so fast scrolling requests the same page several times and appends it repeatedly. Judge: Uses a large many-tasks fixture with pages 2-7 of the task list delayed 2.2s (slower than the agent saw). Flicks the Inbox list down, back up and down with the mouse wheel until the end, then requires every task from the mock API listed exactly once and in API order. It then switches the Status filter to Done while a page is loading and back to All, scrolls to the end again and repeats the same check.

**row-actions-kbd** · Keyboard access to Inbox quick actions · bug fix · controls · hover, keys · 3 runs, 1 round

Seed: Removes keyboard access to the Inbox row quick actions: the Complete and Star buttons get tabIndex -1 and are shown only on hover, not on focus-within. Judge: Requires the quick actions to stay hidden without hover or focus and to appear on hover. Tabbing from a row's title link must reach its Complete and Star buttons within that row, each visibly shown and not covered while focused, with other rows' actions still hidden; Enter on Complete must mark the task done and Space on Star must star it in the mock API. After focus leaves and the mouse is away, the actions must be hidden again.

**draft-keep** · Keep unsent comment drafts per task · feature · browser · history · 3 runs, 1 round

Seed: none Judge: Types partial comments on two Inbox tasks and requires each task's draft to be independent and to survive switching tasks, a reload, and browser Back/Forward. Posting a restored draft must save it once in the mock API, clear the box and not bring the draft back after reload; an untouched task must show no draft, and the draft must also appear in a new tab of the same browser. Finally, with comment posting failing with HTTP 500, a failed post must leave the draft in place after a reload.

**attach-upload** · Attachment preview and 1 MB limit · feature · browser · upload, iframe · 3 runs, 2 rounds

Seed: Removes the attachment preview (clickable file names and preview iframe) and the client-side 1 MB size check from the Inbox task's attachments. Judge: With uploads delayed 1.5s, clicking an attachment's name in an Inbox task must show the file's contents in an iframe and clicking again must hide it. A newly uploaded file must appear in the preview and be saved in the mock API, and a 700 KB file must upload. Picking a 1.5 MB file must immediately show a message stating the 1 MB limit, send no upload request and attach nothing, and the upload control must still work for a small file afterwards.

**back-keeps-place** · Back to Inbox keeps scroll and highlight · bug fix · nav · scroll, history · 3 runs, 1 round

Seed: Plants the bug: returning from a task to the Inbox reloads and empties the paged list (losing the scroll position) and no longer highlights the last-viewed task. Judge: At a 390x844 viewport with a many-tasks fixture, scrolls the Inbox several batches down with the mouse wheel, opens a task and goes back with the browser's Back button, and later with the in-page Inbox link. Each time the previously opened row must be within 16px of its earlier position in the list and visibly highlighted (class/aria marker or distinct background), and only one row may stay highlighted.

**old-links** · Legacy task links: Back, deleted notice, Copy link · bug fix · nav · history, clipboard · 3 runs, 2 rounds

Seed: Plants the bugs: legacy /browse/TT-#### redirects push a history entry instead of replacing it, deleted tasks reached by a legacy link show a generic not-found message, and Copy link copies legacy /browse/TT-… addresses. Judge: Visiting a legacy link from the Board must land on the task's new address and Back must return to the Board. After deleting a task through the mock API, its legacy link must say it was deleted, name the task, the member who deleted it and a date, and not say not found; an unknown legacy link must say not found without claiming deletion. Copy link on a task page, in a newly created task's row menu and in the Inbox pane must put the task's new /tasks/<id> address on the clipboard, and that link must open the new task.

**login-return** · Return to deep link after sign-in · bug fix · auth · history · 3 runs, 1 round

Seed: Plants the bug: the post-sign-in redirect only allows a fixed whitelist of top-level pages, so task and inbox deep links (with filters) fall back to the home page. Judge: With the mock API requiring sign-in, opens /tasks/4 signed out, signs in, and requires that task to show at /tasks/4; after signing out, an /inbox/5?status=active link must return to that path with the status filter kept and no sign-in form left. Opening /login?next=/tasks/2 while signed in must go straight to that task, and signing in with next set to a protocol-relative or absolute external URL must stay on the app's origin and open the app.

**viewer-role** · Read-only members offered edits; silent 403s · bug fix · auth · read, wait · 3 runs, 1 round

Seed: Plants two bugs: the read-only check compares against lowercase 'viewer' while the API returns 'Viewer', so viewers see all edit controls; and delete becomes optimistic, removing the task even when the server refuses. Judge: With the mock API's current member set to the Viewer role, requires no add-task box, edit/delete/complete/star buttons, enabled checkboxes or editable fields on the task list, task page, Board and Inbox, and no delete/move items in the row menu. It then loads as Owner, switches the server to Viewer behind the app's back and clicks Delete: the task must remain in the mock API and in the list, and the user must be told of the refusal (new on-page text or an alert matching words like permission/forbidden/couldn't); a refused completion must not stay checked, and the task must still be there after reload.

**session-expiry** · Re-authenticate in place on session expiry · bug fix · auth · wait, keys · 3 runs, 1 round

Seed: Plants the bug: a 401 during a session now signs the user out to the sign-in page (discarding the form) instead of opening the in-place re-sign-in dialog and retrying the request. Judge: With sign-in required, fills Title and Notes on a task's edit page, expires all sessions in the mock API and clicks Save. A password prompt must appear while the typed values stay on the page; a wrong password must show an error and nothing must be saved yet; after the correct password the original save must complete automatically with both fields stored in the mock API, without landing on the sign-in page. The same flow for posting an Inbox comment must post it exactly once after re-sign-in and show it in the thread.

**checkout-return** · Checkout in new tab; cancel voids order · bug fix · payment · tab, history · 3 runs, 1 round

Seed: Plants two bugs: checkout opens in the same tab instead of a new one, and returning via 'Cancel and return' only shows a notice without cancelling the pending order. Judge: On the Credits page, clicking Buy 100 credits must open the mock checkout page in a new tab while the original tab stays on Credits with no 'blocked' message, and a pending order must exist. Using 'Cancel and return' on the checkout tab must set the order to cancelled in the mock API and show it as Cancelled both on the returned tab (also after reload) and on the Credits tab left open. A second purchase paid on checkout must mark the order paid, raise credits to 750 and show Paid in both tabs.

**balance-refresh** · Live credit balance after payment · bug fix · payment · tab, wait · 3 runs, 1 round

Seed: Plants two bugs: the server-event client reads untyped onmessage messages while the mock API sends named events, so no live updates arrive; and the Credits page no longer refreshes on window focus or visibility change. Judge: With payments taking 2.5s in the mock API, buys credits from the Credits page, pays in the new checkout tab and immediately switches back. Without a reload, the balance must rise from 250 to 350, the order must show Paid and the notification bell's unread count must go from 2 to 3. After the mock API drops the live event connection, a second purchase must still update the balance to 850 and the bell to 4.

**white-screen** · Task page goes white after edit-save · bug fix · debug · devtools · 3 runs, 1 round

Seed: Plants the bug: the task page adds a 'Due' line guarded by "'dueDate' in task" and formats it unconditionally, so a task saved with a null due date throws and blanks the whole app. Judge: Records page errors. A task set to a null due date via the mock API must open with its heading; saving a title change on the edit page, reloading, setting and then clearing a due date, and saving a repeating task with an empty estimate must each leave the task page rendered (with Edit all fields and Delete task still present) and never show Invalid Date/NaN. Clearing the due date must actually clear it in the mock API and remove the old date from the page, the Inbox must render affected tasks, and no uncaught page error may occur.

**wrong-param** · Inbox Status filter has no effect · bug fix · debug · devtools · 3 runs, 1 round

Seed: Plants the bug: the paged task request sends the status filter as 'state' instead of 'status', so the mock API ignores it and returns everything. Judge: With a many-tasks fixture, picks Done and then Active in the Inbox Status filter and requires the task count next to the title to equal the matching number in the mock API and every listed row to have the right done state; for Done it scrolls through all pages and requires exactly the done tasks, each once. After reloading with Active selected, no finished tasks may be listed and the count must match the active total.

**activity-log** · Activity page filters, per-task view, delete, Load more · feature · long · read, history, dialog · 5 runs, 5 rounds

Seed: none Judge: A five-round feature; the judge first adds 45 task-rename entries to the mock API's activity log, then compares the listed entries one by one with the expected log. It requires Type and Person filters kept in the URL (surviving reload, undone by Back/Forward), a Load more button adding 20 entries with the old Newer/Older paging gone, and per-entry Delete behind a native confirm dialog that names the entry (cancel deletes nothing, confirm deletes and keeps the filters). Load more must skip nothing after a delete and show nothing twice after new activity arrives; a task's View activity link must show only that task's entries, name the task, combine with Type and Person filters and allow returning to all activity; the Orders type must filter correctly, and Viewers must get no Delete buttons.

**notify-center** · Notifications page with live counts and toasts · feature · long · wait, read · 5 runs, 5 rounds

Seed: none Judge: A five-round feature driven by notifications pushed from the mock API. Requires a sidebar Notifications link whose unread count always matches the bell and the tab title '(n) Team Tasks', a newest-first /notifications page that receives new items live without a pop-up, persistent Mark as read and Mark all as read, and clicking a task notification to open the task and mark it read. All/Unread tabs must live in the URL (survive reload and Back), with items marked read in Unread staying until the page is left. Pop-ups must appear only for tasks assigned to the current user and include a working View button; after the mock API drops the live stream, 'Reconnecting…' must show in the bell panel and on the page, and once reconnected, notifications sent meanwhile must appear and all counts be correct.

**recurring** · Recurring tasks: spawn next, scope edits, stop · feature · long · read, keys, history · 5 runs, 5 rounds

Seed: none Judge: A five-round feature checked against the mock API's stored tasks. Completing a repeating task from the list checkbox, Board Mark done, the task page's Completed box or the edit page's Status must create exactly one next task with the same title, priority, description, assignee and rule, due per the rule (weekly/daily counted from completion when overdue, monthly from the old due date, no due date counted from today). The task page and Board cards must show the rule and due date; saving an edit must ask Only this task / This and future tasks (Escape saves nothing and keeps the form), with each scope applied correctly to the series. Unticking and re-ticking must not create a duplicate, Stop repeating must turn off the rule for all not-done tasks in the series without deleting anything, and the whole run must create exactly 7 new tasks.

### Team Tasks · interaction ★

7 tasks, also on Team Tasks, where the bug is a control the user can see but cannot click. They run 5 times and are reported on their own.

**qa-header-shadow** · QA pass: header shadow blocks controls · QA report · qa · click-hit · 5 runs, 1 round

Seed: Plants the bug: adds a 110px transparent gradient ::after 'shadow' under the sticky header without pointer-events: none, covering the add-task row and the filter/search/sort toolbar for mouse clicks (keyboard still works). Judge: The agent is asked to QA the app without changing code and write qa-report.md. The report is split into entries (top-level bullets or headings with their continuation lines) and matched by rule-based regular expressions, no LLM: some non-negated sentence must say a control can't be clicked/doesn't respond to the mouse while the entry names the add-task row, filters, search, sort or toolbar, or say the header/shadow/overlay covers or intercepts them. Sentences saying things work fine and 'No problems found' do not count.

**divider-lock** · Inbox resize divider locks the page · bug fix · interaction · drag, click-hit · 5 runs, 1 round

Seed: Plants the bug: the Inbox split divider listens for mouseup to end a drag while pointerdown calls preventDefault, so the drag never ends and a transparent drag overlay keeps covering the page. Judge: Opens the Inbox and drags the list/details divider 120px right with real mouse events, requiring the list width to grow by about 120px and stay fixed when the mouse moves after release. It then clicks a task title at its visible centre (hit-tested, no forced clicks) and requires the task to open and the resize cursor to be gone; a second drag 100px left must also resize the list and leave another task clickable.

**card-stretch** · Board card buttons open task instead · bug fix · interaction · click-hit · 5 runs, 1 round

Seed: Plants the bug: the card title's stretched-link ::after overlay gets z-index 1 and the rule lifting card buttons above it is removed, so Star, Mark done and Delete clicks land on the link. Judge: On the Board, clicks the star, Mark done and delete buttons on three cards at their visible centres and requires each to stay on the Board and change the task in the mock API (starred, done, deleted). As a control, clicking empty space in a card's footer and clicking a card's title must still open that task's page.

**loading-veil** · Inbox unclickable after slow load · bug fix · interaction · wait, click-hit · 5 runs, 1 round

Seed: Plants the bug: the Inbox list's loading veil appears only after 300ms and, once loading ends, just fades to opacity 0 without being removed or made click-through, so it blocks the list on slow connections. Judge: Runs with the mock API's task-list endpoint delayed 1.2s. Requires a visible loading indicator over the list on first load and after changing the Status filter, and that it disappears; after each load, clicking a task title must open it, hovering a row must show its quick-action buttons, clicking the star must star the task in the mock API, and the row's more-actions button must open its menu.

**sticky-save** · Section links hide fields under sticky bar · bug fix · interaction · scroll, click-hit · 5 runs, 1 round

Seed: Adds Basics / Planning / Repeat / Notes anchor links to the sticky toolbar of the task edit page, with no scroll offset for the sticky header, so jumped-to sections land underneath it. Judge: At a 1200x760 viewport with a long-task fixture, opens the edit page, scrolls to the bottom with the mouse wheel and checks the toolbar is still sticky. Clicking Basics, Planning and Repeat must leave each section heading and its first fields (Title, Status, Estimate, Repeats) uncovered at their visible centres; it then types into Title and Estimate, clicks Save at the bottom, and requires the saved title and estimate in the mock API.

**hover-ghost** · Inbox task names not clickable · bug fix · interaction · hover, click-hit · 5 runs, 1 round

Seed: Plants the bug: the row hover-actions container is stretched across the whole row and hidden only with opacity 0 (still receiving clicks), so it covers task titles. Judge: Opens the Inbox and requires the quick-action buttons to be invisible on non-hovered rows. Clicking two task titles at their visible centres must open them; as a control, hovering a row must reveal its complete/star buttons, and clicking them must mark the task done or starred in the mock API without opening the task.

**menu-clip** · Row menu clipped at list bottom · bug fix · interaction · click-hit, scroll · 5 runs, 1 round

Seed: Plants the bug: the Inbox row's more-actions menu is no longer portalled to the body with fixed positioning but absolutely positioned inside the scrolling list, so menus on the last rows are clipped. Judge: At a 1200x760 viewport, scrolls the Inbox list to the bottom with the mouse wheel, opens the last task's more-actions menu and clicks Move to Done and then Delete at their visible centres, requiring both changes in the mock API. As a control, the first task's menu must open next to its button and its Move to Done must work.

### Real projects

9 tasks on real open-source projects (Excalidraw, Lexical, tldraw, react-admin), not written for the benchmark: each is a merged upstream bug fix, and the agent works on the commit just before it.

**excalidraw-12053** · Excalidraw menus don't close on outside click · bug fix · excalidraw · canvas, click-hit · 3 runs, 1 round

Seed: none (the agent works in the real Excalidraw repository checked out just before the upstream fix, with git history removed) Judge: Loads the Excalidraw app in headless Chrome at 1200x900 and uses real mouse clicks at screen coordinates. As a control, Escape must close the main (hamburger) menu; then the main menu, opened twice, and the toolbar's More tools dropdown must each close after a click on an empty canvas point (verified to be the canvas by hit-testing). Upstream: [excalidraw/excalidraw/pull/12053](https://github.com/excalidraw/excalidraw/pull/12053), base `f1a79b73df`.

**excalidraw-11922** · Excalidraw Save-as shortcut while editing text · bug fix · excalidraw · keys, canvas, download · 3 runs, 1 round

Seed: none (the agent works in the real Excalidraw repository checked out just before the upstream fix, with git history removed) Judge: Stubs the browser's save-file picker to capture written files (a real download also counts). Double-clicks empty canvas, types 'hello' into a new text element and presses Cmd/Ctrl+Shift+S: within 3 seconds the text editor must close and a saved file must contain the text 'hello'. The same flow with plain Cmd/Ctrl+S is a control that must pass for the result to count. Upstream: [excalidraw/excalidraw/pull/11922](https://github.com/excalidraw/excalidraw/pull/11922), base `d29d864884`.

**lexical-9752** · Lexical checklist click hijacks next Space · bug fix · lexical · keys, read · 3 runs, 1 round

Seed: none (the agent works in the real Lexical repository checked out just before the upstream fix, with git history removed) Judge: In the Lexical playground, types a paragraph followed by a check-list item, clicks at the end of the paragraph to place the caret, then clicks the item's check mark (it must become checked) and types ' Ping me'. The item must stay checked with text 'Task' and the paragraph must read 'Owners sign off by Friday. Ping me'. As a control, with the caret inside the item, clicking its check mark and pressing Space must still uncheck it. Upstream: [facebook/lexical/pull/9752](https://github.com/facebook/lexical/pull/9752), base `c1351ad29f`.

**lexical-9346** · Lexical blank Vertical Align menu item · bug fix · lexical · resize, look · 3 runs, 1 round

Seed: none (the agent works in the real Lexical repository checked out just before the upstream fix, with git history removed) Judge: In the Lexical playground, inserts a 2x3 table through the toolbar, clicks a body cell and opens the cell's actions menu. At both 1000px and 1280px viewport widths, the 'Vertical Align' menu entry must render the visible text 'Vertical Align' (its label element must be visible, not hidden by narrow-width CSS). Upstream: [facebook/lexical/pull/9346](https://github.com/facebook/lexical/pull/9346), base `d487cb6728`.

**tldraw-11115** · tldraw Escape during page drag closes menu · bug fix · tldraw · drag, keys · 3 runs, 1 round

Seed: none (the agent works in the real tldraw repository checked out just before the upstream fix, with git history removed) Judge: In the tldraw examples app with five pages, Escape without a drag must close the page menu (control). Dragging the second page row down two rows with the mouse held and pressing Escape must keep the menu open and return every row to its slot, not dragging; releasing must change neither page order nor current page. After reopening the menu, all rows must sit in their slots and must not move when the pointer hovers over them. Upstream: [tldraw/tldraw/pull/11115](https://github.com/tldraw/tldraw/pull/11115), base `1304f95496`.

**tldraw-11253** · tldraw frame heading hit area when zoomed out · bug fix · tldraw · canvas, click-hit · 3 runs, 1 round

Seed: none (the agent works in the real tldraw repository checked out just before the upstream fix, with git history removed) Judge: Creates a large frame in the tldraw examples app and sets the camera to 10%, 20% and 100% zoom. At each zoom, a real click on blank canvas 8 screen pixels above the visible frame heading must not select the frame, while clicking the heading itself must select it. Upstream: [tldraw/tldraw/pull/11253](https://github.com/tldraw/tldraw/pull/11253), base `ccf6cccc22`.

**react-admin-11406** · react-admin filters appear in order added · bug fix · react-admin · read · 3 runs, 1 round

Seed: none (the agent works in the real react-admin repository checked out just before the upstream fix, with git history removed) Judge: On the demo's Orders list, adds filters through the Add filter menu in two fresh browser contexts: Min amount then Customer, and Customer then Min amount. The visible filter fields, read top-to-bottom and left-to-right, must be the search box followed by the filters in the order they were added. Upstream: [marmelab/react-admin/pull/11406](https://github.com/marmelab/react-admin/pull/11406), base `7e365e3e00`.

**react-admin-11342** · react-admin InPlaceEditor saves on focus loss · bug fix · react-admin · keys · 3 runs, 1 round

Seed: none (the agent works in the real react-admin repository checked out just before the upstream fix, with git history removed) Judge: On a post's show page in the simple example (Miscellaneous tab), clicks the Views in-place editor, types a new number and leaves it three ways: pressing Tab to the next button, clicking a tab header, and clicking plain text. Each time the editor must close and show the new value, and the value must still be shown after navigating to the list and back to the post. Then, on a blank page of the same dev server, mounts two in-place editors built from the app's own react-admin modules: a text editor, which must save and close when focus moves to a plain input, and a Select editor, where opening the dropdown must leave the editor open and the picked choice must be saved. Upstream: [marmelab/react-admin/pull/11342](https://github.com/marmelab/react-admin/pull/11342), base `a13cab504a`.

**react-admin-11310** · react-admin list page resets on reload · bug fix · react-admin · history, wait · 3 runs, 1 round

Seed: none (the agent works in the real react-admin repository checked out just before the upstream fix, with git history removed) Judge: In the simple example (which has an auth provider), opens the Posts list, goes to page 2 with the pagination control, then reloads the tab and separately opens the same page-2 URL in a new tab. After each, once settled for 2 seconds, the list must show rows starting at 11 and the URL must still have page=2. Upstream: [marmelab/react-admin/pull/11310](https://github.com/marmelab/react-admin/pull/11310), base `7ee7217e6f`.