feat(explorer): render todo lists

[roaga]

show ui for todo list tool (copy in screenshot is outdated)

Part of AIML-1692

backend: https://github.com/getsentry/seer/pull/4174

[linear]

AIML-1692 add todo list tools

[cursor]

Bug: Task list checkboxes missing list item marker prefix

The todosToMarkdown function generates markdown without the required list item marker (-). GFM task list syntax requires the format - [x] item or - [ ] item, but the current code produces [x] item or [ ] item. Without the leading hyphen, the markdown parser won't recognize these as task list items, so checkboxes will render as plain text [x] and [ ] instead of actual checkbox UI elements.

 

[roaga]

intended

[cursor]

Bug: Duplicate todo list rendering with multiple tool calls

The showTodoList condition is evaluated inside the tool_calls.map() loop, checking isTodoWriteCall for each tool call independently. If a block contains multiple todo_write tool calls and is the latest todo block, the same block.todos array gets rendered under each todo_write call, causing duplicate todo list UI elements. The code lacks a check to ensure the todo list is only rendered once per block rather than once per matching tool call.