fix(dashboard): use os._exit on quit so bottles survive the dashboard

The `bottles` dict held `@contextmanager`-wrapped launch contexts.
On normal Python interpreter shutdown those context managers'
generators got GC'd, which raised GeneratorExit at the yield
point and ran the `finally` block — invoking each bottle's
teardown and tearing down the compose project. Net effect: `q`
WAS implicitly stopping every dashboard-launched bottle even
though the keypress handler just `return`'d.

`os._exit(0)` skips all Python-level cleanup (GC, atexit, etc.),
so the docker compose projects survive the dashboard exit
untouched. Curses gets explicit `endwin()` first because the
brutal exit skips curses.wrapper's normal terminal restoration.

Matches PRD 0020's resolved-question answer (`q` does NOT tear
down bottles; teardown is always explicit via `x` or
`./cli.py cleanup`).

claude_bottle/cli/dashboard.py

@@ -650,16 +650,61 @@ def _bottle_for_slug(
     return synth, (prompt_path or "")
 
 
+def _stop_bottle_flow(
+    stdscr: "curses._CursesWindow",
+    bottles: dict,
+    slug: str,
+) -> str:
+    """Explicit per-bottle teardown (PRD 0020 chunk 4). Pops the
+    (cm, bottle, identity) tuple from the dashboard's bottles
+    map, snapshots the transcript best-effort, drives the launch
+    context's __exit__ (compose down + network remove), and
+    settles the state dir. A non-owned slug is a no-op with a
+    hint pointing at `./cli.py cleanup`."""
+    if slug not in bottles:
+        return (
+            f"[{slug}] not dashboard-owned — use ./cli.py cleanup"
+        )
+    cm, _bottle, identity = bottles.pop(slug)
+    # compose-down writes to stderr; drop curses so the lines
+    # render cleanly. Same pattern as the attach handoff.
+    curses.endwin()
+    try:
+        # Best-effort snapshot before teardown so the operator
+        # can still inspect the agent's last state via the
+        # preserved transcript dir even after explicit stop.
+        # exit_code=0 → no auto-preserve; the operator's
+        # existing preserve marker (if any) is honored by
+        # settle_state below.
+        try:
+            capture_session_state(identity, exit_code=0)
+        except BaseException:
+            pass
+        try:
+            cm.__exit__(None, None, None)
+        except BaseException:
+            pass
+    finally:
+        stdscr.refresh()
+    settle_state(identity)
+    return f"[{slug}] stopped"
+
+
 def _attach_to_bottle(
     stdscr: "curses._CursesWindow",
     bottle,
     slug: str,
 ) -> str:
     """Handoff: curses.endwin → attach claude → curses refresh.
-    Returns the post-attach status-line message."""
+    Re-entry into a running bottle from the dashboard always
+    passes `--resume` so claude picks up its prior conversation
+    rather than starting a fresh transcript — the first attach
+    happens via `_new_agent_flow` which sets up the transcript
+    in the first place. Returns the post-attach status-line
+    message."""
     curses.endwin()
     try:
-        exit_code = attach_claude(bottle, remote_control=False)
+        exit_code = attach_claude(bottle, remote_control=False, resume=True)
     except BaseException:
         stdscr.refresh()
         raise
@@ -815,6 +860,30 @@ def _try_init_green() -> int:
         return 0
 
 
+def _quit_without_teardown(bottles: dict) -> None:
+    """Exit the dashboard process WITHOUT triggering Python's normal
+    cleanup of the `bottles` dict's context managers.
+
+    The dict holds `@contextmanager`-decorated objects whose
+    underlying generators have implicit close-on-GC behavior:
+    when Python's interpreter shutdown collects them, each
+    generator's `finally` block runs, which invokes that bottle's
+    teardown (`docker compose down`). PRD 0020 explicitly DOESN'T
+    want that — quitting the dashboard should leave running
+    bottles running. `os._exit` skips all Python-level cleanup
+    (GC, atexit, stdio flush, etc.), so the docker compose
+    projects survive the dashboard exit untouched.
+
+    The `bottles` arg is accepted for the explicit
+    documentation-of-intent — we're choosing not to close
+    these. Curses gets its terminal restored via the explicit
+    `endwin` below since `os._exit` doesn't run
+    curses.wrapper's finally."""
+    del bottles  # nothing to do with it; the os._exit is the point
+    curses.endwin()
+    os._exit(0)
+
+
 # PRD 0019 chunk 3: which pane the j/k/arrow keys move through.
 # Tab toggles. The proposals pane is the default focus — proposal
 # action keys (a/m/r/Enter) require it; agent-scoped keys (e/p,
@@ -895,7 +964,8 @@ def _main_loop(stdscr: "curses._CursesWindow") -> None:
         status_line = ""
 
         if key in (ord("q"), 27):  # q or ESC
-            return
+            _quit_without_teardown(bottles)
+            return  # unreachable; _quit_without_teardown os._exit's
         if key == 9:  # Tab
             focus = PANE_AGENTS if focus == PANE_PROPOSALS else PANE_PROPOSALS
             continue
@@ -927,10 +997,8 @@ def _main_loop(stdscr: "curses._CursesWindow") -> None:
 
         if focus == PANE_AGENTS:
             # j/k/arrow navigate the agents list. Enter re-attaches
-            # to the focused bottle (PRD 0020 chunk 3) — works for
-            # both dashboard-owned bottles and bottles discovered
-            # via `list_active_slugs` (the synth path resolves the
-            # in-container claude target from the slug).
+            # (PRD 0020 chunk 3); `x` explicitly stops a
+            # dashboard-owned bottle (chunk 4).
             if key in (curses.KEY_DOWN, ord("j")):
                 selected_agent = min(selected_agent + 1, max(0, len(agents) - 1))
             elif key in (curses.KEY_UP, ord("k")):
@@ -943,6 +1011,14 @@ def _main_loop(stdscr: "curses._CursesWindow") -> None:
                     manifest = manifest_cache[0]  # may be None; that's ok
                     bottle, _hint = _bottle_for_slug(target.slug, bottles, manifest)
                     status_line = _attach_to_bottle(stdscr, bottle, target.slug)
+            elif key == ord("x"):
+                target = _selected_agent(focus, agents, selected_agent)
+                if target is None:
+                    status_line = "no agent selected"
+                else:
+                    status_line = _stop_bottle_flow(
+                        stdscr, bottles, target.slug,
+                    )
             continue
 
         if not pending:
@@ -1082,7 +1158,7 @@ def _render(
 
     footer = (
         "[n] new  [Tab] switch  [j/k] move  "
-        "[Enter] view/attach  [a/m/r] proposal  [e/p] edit  [q] quit"
+        "[Enter] view/attach  [x] stop  [a/m/r] proposal  [e/p] edit  [q] quit"
     )
     stdscr.hline(h - 2, 0, curses.ACS_HLINE, w)
     stdscr.addnstr(h - 1, 0, footer, w - 1, curses.A_DIM)

claude_bottle/cli/start.py

@@ -92,15 +92,22 @@ def prepare_with_preflight(
 
 
 def attach_claude(
-    bottle: Bottle, *, remote_control: bool = False,
+    bottle: Bottle, *, remote_control: bool = False, resume: bool = False,
 ) -> int:
     """Run claude inside `bottle` as an interactive session. Blocks
     until the session ends; returns the claude process's exit code.
 
+    `resume=True` adds `--continue` so claude picks up its most
+    recent session non-interactively (no session-picker prompt) —
+    the right shape for the dashboard's Enter re-attach (PRD 0020
+    chunk 3), where a bottle typically has exactly one session.
+    First-attach paths (`./cli.py start`, the dashboard's new-agent
+    flow) leave it False.
+
     Used as the inner step of `./cli.py start` (one-shot) and by the
-    dashboard (PRD 0020), which calls it from inside a `curses.endwin
-    → … → stdscr.refresh()` handoff so the curses surface gets out
-    of the terminal's way while claude has it."""
+    dashboard, which calls it from inside a `curses.endwin → … →
+    stdscr.refresh()` handoff so the curses surface gets out of the
+    terminal's way while claude has it."""
     info(
         "attaching interactive claude session "
         "(Ctrl-D or 'exit' to leave; container will be removed)"
@@ -108,6 +115,10 @@ def attach_claude(
     claude_args = ["--dangerously-skip-permissions"]
     if remote_control:
         claude_args.append("--remote-control")
+    if resume:
+        # `--continue` jumps straight to the most recent session
+        # without showing the picker `--resume` would surface.
+        claude_args.append("--continue")
     return bottle.exec_claude(claude_args, tty=True)
 
 

tests/unit/test_dashboard_active_agents.py

@@ -379,6 +379,24 @@ class TestBottleForSlug(unittest.TestCase):
         self.assertEqual("", hint)
 
 
+class TestStopBottleFlow(unittest.TestCase):
+    """Explicit per-bottle stop (PRD 0020 chunk 4). The non-owned
+    path is the one safe to test without curses + docker — the
+    owned path drives `cm.__exit__` against a real launch context
+    and belongs in integration tests."""
+
+    def test_non_owned_returns_cleanup_hint(self):
+        # stdscr is None here on purpose — the non-owned branch
+        # returns before any curses call.
+        msg = dashboard._stop_bottle_flow(
+            stdscr=None,  # type: ignore[arg-type]
+            bottles={},
+            slug="ghost-zzz",
+        )
+        self.assertIn("not dashboard-owned", msg)
+        self.assertIn("./cli.py cleanup", msg)
+
+
 class TestOperatorEditFlowGuards(_FakeHomeMixin, unittest.TestCase):
     """Chunk-4 contract: the edit flow refuses when the selected
     agent doesn't have the required sidecar running. The discover-