The new loop's core: intake, restatement, go-ahead, threads (M2.1, PR B)

nisse_dev.loop runs alongside control.py, chosen with `loop: new`.
Issues assigned to the agent (by an operator, or filed by one) become work
items, each with a Matrix thread. A driver run is one model with tools
until it calls a waiting tool: restate puts rev-N up for a go-ahead, bound
to the revision on screen when the reply arrived; ask_human waits for an
answer; close_item closes the item and its issue. Before the go-ahead the
driver can look but not change or close anything. One item is active at a
time; replies in an item's thread go to it. On boot, an item cut off
mid-run waits on the operator, and waiting points are put up again.

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

nisse-dev/src/nisse_dev/gitea.py

@@ -42,6 +42,15 @@ class Comment:
     created_at: str
 
 
+@dataclass(frozen=True)
+class Issue:
+    number: int
+    title: str
+    body: str
+    author: str
+    labels: tuple[str, ...]
+
+
 class GiteaClient:
     def __init__(
         self,
@@ -158,6 +167,44 @@ class GiteaClient:
     def close_pull_request(self, repo: str, index: int) -> None:
         self._request("PATCH", f"/repos/{repo}/pulls/{index}", json={"state": "closed"})
 
+    def assigned_issues(self, repo: str, assignee: str) -> list[Issue]:
+        """Open issues (not PRs) assigned to ``assignee``: intake (D1)."""
+        data = self._request(
+            "GET",
+            f"/repos/{repo}/issues",
+            params={
+                "type": "issues",
+                "state": "open",
+                "assigned_by": assignee,
+                "limit": 50,
+            },
+        )
+        return [
+            Issue(
+                number=int(item["number"]),
+                title=str(item.get("title") or ""),
+                body=str(item.get("body") or ""),
+                author=str(item["user"]["login"]),
+                labels=tuple(str(label["name"]) for label in item.get("labels") or []),
+            )
+            for item in data or []
+            if not item.get("pull_request")
+        ]
+
+    def assigned_by(self, repo: str, index: int, assignee: str) -> str | None:
+        """Who last assigned the issue to ``assignee``, from its timeline;
+        None if the timeline doesn't say."""
+        events = self._request("GET", f"/repos/{repo}/issues/{index}/timeline") or []
+        who = None
+        for event in events:
+            if (
+                event.get("type") == "assignees"
+                and not event.get("removed_assignee")
+                and (event.get("assignee") or {}).get("login") == assignee
+            ):
+                who = (event.get("user") or {}).get("login")
+        return who
+
     def close_issue(self, repo: str, index: int) -> None:
         self._request(
             "PATCH", f"/repos/{repo}/issues/{index}", json={"state": "closed"}