Conversation on the new loop (M2.7)

- Questions never change state (L5, #77): a message ending in "?" to a
  waiting project item starts a question run (reply and look-only tools,
  an instruction to change nothing), and the item goes back to the very
  wait it was in: a restatement up stays up and a go binds to it; the
  agent's own question stays open.
- Explanations: a restatement gives its reasons and the main alternative;
  a revision says what changed (restate(changed), sent back without it);
  a milestone's summary says what was done, verified and left open.
- Progress in prose (#42): the driver's and a helper's own words for a
  turn are posted, trimmed, at most once a minute per item; `details`
  shows the last tool calls; a message arriving mid-run is acknowledged at
  once ("Noted; ...").
- CI: the e2e job's comments and the plan no longer claim a newer push
  cancels the run it supersedes (Gitea here doesn't); the concurrency
  block goes.

Tests: conversation unit tests (questions in a go-ahead and an answer wait,
an unanswerable question, revisions, progress rate and trimming, details,
mid-run notes), the helper's progress, the walk asking questions in every
state with a questions_change_nothing property (routing questions the old
way fails 32 of 48 seeds), and an e2e question while a restatement is up.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE

nisse-dev/tests/test_loop_labels.py

@@ -118,7 +118,7 @@ def test_a_plain_yes_is_a_go_ahead_said_so_first(tmp_path: Path) -> None:
 def test_anything_else_goes_to_the_driver(tmp_path: Path) -> None:
     h = Harness(
         tmp_path,
-        ScriptedModel(RESTATED, [call("restate", text="v2")]),
+        ScriptedModel(RESTATED, [call("restate", text="v2", changed="as you asked")]),
         FakeGitea(issue()),
         reader=Reader(),
     )
@@ -132,7 +132,7 @@ def test_a_question_never_reaches_the_reader(tmp_path: Path) -> None:
     reader = Reader("sounds good?")
     h = Harness(
         tmp_path,
-        ScriptedModel(RESTATED, [call("restate", text="v2")]),
+        ScriptedModel(RESTATED, [call("restate", text="v2", changed="as you asked")]),
         FakeGitea(issue()),
         reader=reader,
     )
@@ -145,7 +145,9 @@ def test_a_plain_yes_to_an_older_revision_is_not_a_go(tmp_path: Path) -> None:
     reader = Reader("yes")
     h = Harness(
         tmp_path,
-        ScriptedModel(RESTATED, [call("restate", text="v2")], STARTED),
+        ScriptedModel(
+            RESTATED, [call("restate", text="v2", changed="as you asked")], STARTED
+        ),
         FakeGitea(issue()),
         reader=reader,
     )
@@ -224,7 +226,12 @@ def test_a_reply_stops_the_bugs_countdown(tmp_path: Path) -> None:
 
 
 def test_a_new_revision_of_a_bug_gets_its_own_countdown(tmp_path: Path) -> None:
-    h, clock = bug(tmp_path, RESTATED, [call("restate", text="v2")], STARTED)
+    h, clock = bug(
+        tmp_path,
+        RESTATED,
+        [call("restate", text="v2", changed="as you asked")],
+        STARTED,
+    )
     h.agent.intake()
     clock.now += 300
     h.say("use the other file")