Add the abandon command

A4 already names abandon as one of the ways out of a halt (continue,
re-plan, or abandon) and 0.2 closes a work item as completed or
abandoned, but no command did it: from a gate or a question the only way
to drop a task was to edit the state database.

- 'abandon' ends the task from any waiting state and returns to IDLE.
  The move is made durable first; then the plan issue and any open
  milestone PR are closed with a note (branches kept), and any
  unresolved intent is aborted so boot reconciliation does not gate on
  work dropped on purpose. A Gitea failure is reported, not fatal.
- Like 'status' it is a command in every state, never read as an answer
  or feedback. While work runs, 'stop' comes first, as before.
- The restart / stranded question and the PR_OPEN hints mention it.
- Spec: B1 gains the abandon edge and B2 the command.

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

docs/Architecture-Build-Spec.md

@@ -909,6 +909,9 @@ EXECUTING                       autonomous; no per-command approval
 PR_OPEN
   → open PR; react to review comments and commits (review loop)
   → on acceptance → next milestone, or project complete
+
+any waiting state (a sign-off gate, AWAIT_INPUT, PR_OPEN)
+  → [abandon]                  close the plan issue and any open PR, → IDLE
 ```
 
 ### B2. Requirements
@@ -917,8 +920,14 @@ PR_OPEN
   or the agent switches on its own under 0.2's rules; other projects stay parked at
   their last position and resume where they left off.
 - **Operator commands** (over transport): `use <project>`, `approve`,
-  `reject <feedback>`, `start milestone <n>`, `status`, `stop` (A4), plus free
-  text during planning (forwarded to the agent as answers).
+  `reject <feedback>`, `start milestone <n>`, `status`, `stop` (A4), `abandon`,
+  plus free text during planning (forwarded to the agent as answers).
+  - `abandon` ends the current work item from any waiting state: the "abandon"
+    among A4's continue / re-plan / abandon, and a close in 0.2's terms. It closes
+    the plan issue and any open milestone PR with a note, keeps the branches, and
+    marks any unresolved intent aborted so boot reconciliation does not gate on
+    work dropped on purpose. While work is running, `stop` comes first. Like
+    `status`, it is a command in every state, never read as an answer or feedback.
 - **Plan gating** per A4: architecture plan and each milestone plan require sign-off
   before the next phase. Enforced structurally. Plans and approvals are externalized
   to Gitea issue comments (Part H, decided); Matrix and Gitea are both approval

nisse-dev/src/nisse_dev/approvals.py

@@ -74,6 +74,12 @@ class PlanBoard:
         except GiteaError:
             pass
 
+    def close(self, issue: int, note: str) -> None:
+        """Close the plan issue with a note saying why (e.g. abandoned).
+        Unlike echo, failures raise: the caller reports them."""
+        self._client.post_comment(self._repo, issue, note)
+        self._client.close_issue(self._repo, issue)
+
     def comments_since(self, issue: int, after_id: int) -> list[Comment]:
         return [
             c for c in self._client.list_comments(self._repo, issue) if c.id > after_id

nisse-dev/src/nisse_dev/control.py

@@ -55,6 +55,10 @@ TRANSITIONS = {
     # than passing through a separate FINISHED state.
     (PR_OPEN, MILESTONE_PLANNING),
     (PR_OPEN, IDLE),
+    # abandon (A4, B2): the operator may end the task from any waiting state.
+    # (AWAIT_INPUT may go anywhere already.)
+    (AWAIT_ARCH_SIGNOFF, IDLE),
+    (AWAIT_MILESTONE_SIGNOFF, IDLE),
 }
 
 
@@ -65,7 +69,7 @@ _WORKING = (PLANNING_ARCH, MILESTONE_PLANNING, EXECUTING)
 
 _BOOT_CHOICES = (
     "reply 'continue' to pick up where the restart cut in, "
-    "or 're-plan' to plan the current step again"
+    "'re-plan' to plan the current step again, or 'abandon' to drop the task"
 )
 
 
@@ -117,6 +121,8 @@ class MilestonePublisher(Protocol):
 
     def comment(self, index: int, body: str) -> None: ...
 
+    def close_pull_request(self, index: int, note: str) -> None: ...
+
 
 class PlanBoard(Protocol):
     """The Gitea side of plan gating; the concrete one is in
@@ -128,6 +134,8 @@ class PlanBoard(Protocol):
 
     def echo(self, issue: int, text: str) -> None: ...
 
+    def close(self, issue: int, note: str) -> None: ...
+
 
 class PlanningAgent(Protocol):
     def plan(
@@ -428,6 +436,13 @@ class Orchestrator:
         text = msg.text.strip()
         if text == "status":
             self._send_status(current)
+        elif text == "abandon":
+            # Like status, a command in every waiting state: it takes
+            # precedence over reading the word as an answer or feedback.
+            if current == IDLE:
+                self._transport.send_message("no active task; nothing to abandon")
+            else:
+                self._abandon(msg.sender)
         elif current == IDLE:
             if text.startswith("use "):
                 self._begin_project(text[4:].strip())
@@ -821,7 +836,7 @@ class Orchestrator:
             self._transition(PR_OPEN, cause=f"[stub] milestone {milestone} done")
             self._transport.send_message(
                 f"[stub] milestone {milestone} done; no publisher, so no PR — "
-                "say 'next milestone' or 'project complete'"
+                "say 'next milestone', 'project complete' or 'abandon'"
             )
             return
         gate = self._data.get("gate") or {}
@@ -869,13 +884,49 @@ class Orchestrator:
             "'project complete'"
         )
 
+    def _abandon(self, sender: str) -> None:
+        """End the task on the operator's word (A4: continue, re-plan, or
+        abandon), closing its Gitea records. Only reached from a waiting
+        state: while work runs the reply is "busy; say 'stop'" instead.
+
+        The move to IDLE is made durable first, so a failure while tidying
+        Gitea can never leave a live task behind a closed plan issue."""
+        note = f"abandoned by {sender}"
+        board_state = self._data.get("board") or {}
+        pr = self._data.get("pr") or {}
+        project = self._project
+        self.stop_watching()
+        self._data = {**_fresh_data()}
+        self._project = None
+        self._store.oplog.task_id = None
+        self._transition(IDLE, cause=f"operator: abandon ({sender})")
+
+        # Dropped on purpose: boot reconciliation must not gate on it.
+        for intent in self._store.pending_intents():
+            self._store.abort_intent(intent.id, cause=note)
+        problems: list[str] = []
+        if self._board is not None and board_state.get("issue"):
+            try:
+                self._board.close(int(board_state["issue"]), note)
+            except GiteaError as exc:
+                problems.append(f"plan issue #{board_state['issue']}: {exc}")
+        if self._publisher is not None and pr.get("number"):
+            try:
+                self._publisher.close_pull_request(int(pr["number"]), note)
+            except GiteaError as exc:
+                problems.append(f"PR #{pr['number']}: {exc}")
+        closed = "; could not close " + ", ".join(problems) if problems else ""
+        self._transport.send_message(
+            f"task on {project} abandoned{closed}. Say 'use <project>' to start another"
+        )
+
     def _return_to_pr_open(self, cause: str) -> None:
         self._transition(PR_OPEN, cause=cause)
         pr = self._data.get("pr") or {}
         self._watch_pr(pr)
         self._transport.send_message(
             f"PR #{pr.get('number')} is open and watched for review comments; "
-            "say 'next milestone' or 'project complete'"
+            "say 'next milestone', 'project complete' or 'abandon'"
         )
 
     def _watch_pr(self, pr: dict[str, Any]) -> None:
@@ -909,8 +960,8 @@ class Orchestrator:
         else:
             pr = self._data.get("pr") or {}
             self._transport.send_message(
-                f"PR #{pr.get('number')} is open; say 'next milestone' or "
-                "'project complete'"
+                f"PR #{pr.get('number')} is open; say 'next milestone', "
+                "'project complete' or 'abandon'"
             )
 
     def _watch(

nisse-dev/src/nisse_dev/gitea.py

@@ -150,6 +150,11 @@ class GiteaClient:
     def close_pull_request(self, repo: str, index: int) -> None:
         self._request("PATCH", f"/repos/{repo}/pulls/{index}", json={"state": "closed"})
 
+    def close_issue(self, repo: str, index: int) -> None:
+        self._request(
+            "PATCH", f"/repos/{repo}/issues/{index}", json={"state": "closed"}
+        )
+
     def close(self) -> None:
         self._http.close()
 

nisse-dev/src/nisse_dev/publish.py

@@ -102,6 +102,12 @@ class MilestonePublisher:
         except GiteaError:
             pass
 
+    def close_pull_request(self, index: int, note: str) -> None:
+        """Close a milestone PR with a note saying why. The branch is kept,
+        so the work can be reopened in Gitea."""
+        self._client.post_comment(self._repo, index, note)
+        self._client.close_pull_request(self._repo, index)
+
     def push_followup(
         self, *, task_id: str, milestone: int, message: str
     ) -> str | None:

nisse-dev/tests/test_abandon.py

@@ -0,0 +1,185 @@
+"""The `abandon` command: ending a task from any waiting state (A4, B2)."""
+
+import io
+from pathlib import Path
+from typing import Any
+
+import pytest
+
+from nisse_dev.control import (
+    AWAIT_ARCH_SIGNOFF,
+    AWAIT_INPUT,
+    AWAIT_MILESTONE_SIGNOFF,
+    IDLE,
+    PR_OPEN,
+    AskHuman,
+    Orchestrator,
+    SubmitPlan,
+)
+from nisse_dev.executor import ExecutorOutcome
+from nisse_dev.gitea import GiteaError, PullRequest
+from nisse_dev.oplog import OpLog
+from nisse_dev.publish import PublishResult
+from nisse_dev.state import StateStore
+from nisse_dev.transport import InMemoryTransport
+
+
+class Planner:
+    def __init__(self, ask_first: bool = False) -> None:
+        self._ask = ask_first
+
+    def plan(
+        self,
+        gate: str,
+        project: str,
+        feedback: str | None = None,
+        answer: str | None = None,
+    ) -> SubmitPlan | AskHuman:
+        if self._ask and answer is None:
+            return AskHuman("which language?")
+        return SubmitPlan(f"{gate} plan")
+
+
+class Board:
+    def __init__(self, *, fail_close: bool = False) -> None:
+        self.closed: list[tuple[int, str]] = []
+        self._fail_close = fail_close
+
+    def open_project_issue(self, project: str, task_id: str) -> int:
+        return 10
+
+    def post_plan(self, issue: int, gate: str, rev: int, plan: str) -> Any:
+        class Posted:
+            comment_id = 1
+
+        return Posted()
+
+    def echo(self, issue: int, text: str) -> None:
+        pass
+
+    def close(self, issue: int, note: str) -> None:
+        if self._fail_close:
+            raise GiteaError("gitea is down")
+        self.closed.append((issue, note))
+
+
+class Executor:
+    def run(self, milestone: int) -> ExecutorOutcome:
+        return ExecutorOutcome("completed", "done")
+
+
+class Publisher:
+    def __init__(self) -> None:
+        self.closed: list[tuple[int, str]] = []
+
+    def reconcilers(self) -> dict[str, Any]:
+        return {}
+
+    def publish(self, **kwargs: Any) -> PublishResult:
+        pr = PullRequest(number=20, state="open", head="h", url="u")
+        return PublishResult(pr, "opened PR #20")
+
+    def close_pull_request(self, index: int, note: str) -> None:
+        self.closed.append((index, note))
+
+
+class Harness:
+    def __init__(
+        self, tmp_path: Path, *, ask_first: bool = False, board: Board | None = None
+    ) -> None:
+        self.store = StateStore(
+            tmp_path / "state.db", oplog=OpLog("nisse-dev", io.StringIO())
+        )
+        self.transport = InMemoryTransport()
+        self.board = board or Board()
+        self.publisher = Publisher()
+        Orchestrator(
+            self.store,
+            self.transport,
+            Planner(ask_first),
+            operators={"don"},
+            board=self.board,
+            executor=Executor(),
+            publisher=self.publisher,
+        ).start()
+
+    @property
+    def state(self) -> str:
+        state = self.store.get_state()
+        assert state is not None
+        return state.state
+
+    def say(self, *replies: str) -> None:
+        for reply in replies:
+            self.transport.receive("don", reply)
+
+
+WAITING = [
+    ("arch sign-off", ["use demo"], AWAIT_ARCH_SIGNOFF),
+    ("milestone sign-off", ["use demo", "approve"], AWAIT_MILESTONE_SIGNOFF),
+    (
+        "approved, not started",
+        ["use demo", "approve", "approve"],
+        AWAIT_MILESTONE_SIGNOFF,
+    ),
+    ("PR open", ["use demo", "approve", "approve", "start milestone 1"], PR_OPEN),
+]
+
+
+@pytest.mark.parametrize(
+    ("replies", "waiting"),
+    [(r, w) for _, r, w in WAITING],
+    ids=[n for n, _, _ in WAITING],
+)
+def test_abandon_ends_the_task_from_any_waiting_state(
+    tmp_path: Path, replies: list[str], waiting: str
+) -> None:
+    h = Harness(tmp_path)
+    h.say(*replies)
+    assert h.state == waiting
+    h.say("abandon")
+    state = h.store.get_state()
+    assert state.state == IDLE
+    assert state.project is None
+    assert "abandoned" in h.transport.outbound[-1].text
+    assert h.board.closed == [(10, "abandoned by don")]
+    # A new task starts cleanly afterwards.
+    h.say("use other")
+    assert h.state == AWAIT_ARCH_SIGNOFF
+
+
+def test_abandon_answers_a_question_by_ending_the_task(tmp_path: Path) -> None:
+    h = Harness(tmp_path, ask_first=True)
+    h.say("use demo")
+    assert h.state == AWAIT_INPUT
+    h.say("abandon")
+    assert h.state == IDLE
+
+
+def test_abandon_in_pr_open_closes_the_pr(tmp_path: Path) -> None:
+    h = Harness(tmp_path)
+    h.say("use demo", "approve", "approve", "start milestone 1")
+    h.say("abandon")
+    assert h.publisher.closed == [(20, "abandoned by don")]
+
+
+def test_abandon_aborts_a_pending_publish_intent(tmp_path: Path) -> None:
+    h = Harness(tmp_path)
+    h.say("use demo")
+    h.store.begin_intent("open_pr", {"branch": "b"}, cause="publish cut short")
+    h.say("abandon")
+    assert h.store.pending_intents() == []
+
+
+def test_abandon_still_ends_the_task_when_gitea_is_down(tmp_path: Path) -> None:
+    h = Harness(tmp_path, board=Board(fail_close=True))
+    h.say("use demo", "abandon")
+    assert h.state == IDLE
+    assert "could not close plan issue #10" in h.transport.outbound[-1].text
+
+
+def test_abandon_with_no_task_says_so(tmp_path: Path) -> None:
+    h = Harness(tmp_path)
+    h.say("abandon")
+    assert h.state == IDLE
+    assert "nothing to abandon" in h.transport.outbound[-1].text

nisse-dev/tests/test_gitea.py

@@ -1,4 +1,5 @@
 import json
+from pathlib import Path
 
 import httpx
 import pytest
@@ -195,3 +196,40 @@ def test_intent_without_a_branch_is_unverifiable() -> None:
         resolved_at=None,
     )
     assert pull_request_reconciler(client(handler), "o/r")(blank) is None
+
+
+def test_closing_comments_first_then_closes_issue_and_pr() -> None:
+    from nisse_dev.approvals import PlanBoard
+    from nisse_dev.git import GitRepo
+    from nisse_dev.publish import MilestonePublisher
+
+    seen: list[tuple[str, str, dict]] = []
+
+    def handler(request: httpx.Request) -> httpx.Response:
+        body = json.loads(request.content) if request.content else {}
+        seen.append((request.method, request.url.path, body))
+        if request.method == "POST":
+            return httpx.Response(
+                201, json={"id": 5, "user": {"login": "bot"}, "body": body["body"]}
+            )
+        return httpx.Response(201, json={})
+
+    gitea = client(handler)
+    PlanBoard(gitea, "o/r").close(10, "abandoned by don")
+    publisher = MilestonePublisher(
+        None,  # type: ignore[arg-type] -- closing touches neither store nor git
+        gitea,
+        "o/r",
+        GitRepo(Path(".")),
+        base_url="https://gitea.test",
+        account="bot",
+        token="tok",
+    )
+    publisher.close_pull_request(20, "abandoned by don")
+
+    assert seen == [
+        ("POST", "/api/v1/repos/o/r/issues/10/comments", {"body": "abandoned by don"}),
+        ("PATCH", "/api/v1/repos/o/r/issues/10", {"state": "closed"}),
+        ("POST", "/api/v1/repos/o/r/issues/20/comments", {"body": "abandoned by don"}),
+        ("PATCH", "/api/v1/repos/o/r/pulls/20", {"state": "closed"}),
+    ]