Screens 2 and 3: new-task form, live log and diff; measured the merge gap they expose

CHECKLIST.md

@@ -46,9 +46,17 @@ been measured.
 
 ## Milestone 3 — add a task, watch it work
 
-- [ ] Screen 2 creates a task with a blocker and the command that decides it is done.
-- [ ] Screen 3 shows the running log and the diff from the task's worktree.
+- [x] Screen 2 creates a task with a blocker and the command that decides it is done.
+      → `AUD-163` and `AUD-164` made in the form; `AUD-164` blocked by `AUD-163`, and the
+      verify command landed in the task's own description.
+- [x] Screen 3 shows the running log and the diff from the task's worktree.
+      → seen live: `running · assignment`, the worktree path and branch, `?? NOTES.md`
+      while the agent worked, then `754cdb5`, `NOTES.md | 3 +++` and the diff.
 - [ ] Pass: a two-task plan is created, ordered and finished from the terminal alone.
+      Created and ordered from the terminal, and both tasks are `done` — but **not by the
+      intended path**. Nothing merges a task's branch, so `AUD-164`'s worktree was cut from
+      `main`, which has no `NOTES.md`; the agent read the file across branches with
+      `git show AUD-163-…:NOTES.md` instead. That is what Milestone 5 exists for.
 
 ## Milestone 4 — the project layer