fix(security): harden git_gate.py shell rendering with shlex.quote and name validation

Use shlex.quote() on name and upstream_url in git_gate_render_entrypoint()
so special characters (single quotes, spaces, semicolons) cannot break or
inject into the generated sh script.

Add _GIT_NAME_RE validation in GitEntry.from_repos_entry() to restrict
repo names to [A-Za-z0-9._-]+, making the manifest the first line of
defence and shlex.quote() the belt-and-suspenders backstop.

Closes #155

bot_bottle/backend/docker/launch.py

@@ -43,7 +43,7 @@ from pathlib import Path
 from typing import Callable, Generator
 
 from ...egress import egress_resolve_token_values
-from ...log import info
+from ...log import info, warn
 from . import network as network_mod
 from . import util as docker_mod
 from .bottle import DockerBottle
@@ -87,10 +87,11 @@ def launch(
     def teardown() -> None:
         try:
             stack.close()
-        except BaseException:
-            # Teardown must not raise; swallow so the caller's
-            # __exit__ path can still propagate the original error.
-            pass
+        except BaseException as exc:
+            warn(
+                f"teardown failed for container {plan.container_name}"
+                f" (compose-down): {exc!r}"
+            )
 
     try:
         # Step 1: agent image build. Sidecar images get built lazily by

bot_bottle/git_gate.py

@@ -29,6 +29,7 @@ backend-specific and lives on concrete subclasses (see
 
 from __future__ import annotations
 
+import shlex
 from abc import ABC, abstractmethod
 from dataclasses import dataclass
 from pathlib import Path
@@ -207,10 +208,7 @@ def git_gate_render_entrypoint(upstreams: tuple[GitGateUpstream, ...]) -> str:
         "mkdir -p /git",
     ]
     for u in upstreams:
-        # Single-quote args so URL/path content (containing : and /)
-        # passes through ash unmangled. Names came through the manifest
-        # validator so they don't contain a single quote.
-        lines.append(f"init_repo '{u.name}' '{u.upstream_url}'")
+        lines.append(f"init_repo {shlex.quote(u.name)} {shlex.quote(u.upstream_url)}")
     lines.extend([
         "",
         "exec git daemon \\",

bot_bottle/manifest_git.py

@@ -2,10 +2,16 @@
 
 from __future__ import annotations
 
+import re
 from dataclasses import dataclass
 
 from .manifest_util import ManifestError, as_json_object
 
+# Shell-safe characters for git-gate repo names. Names are embedded in
+# the generated entrypoint shell script (shlex.quote is the primary
+# defence; this regex is belt-and-suspenders and documents intent).
+_GIT_NAME_RE = re.compile(r"^[A-Za-z0-9._-]+$")
+
 
 def _opt_str(value: object, label: str) -> str:
     if value is None:
@@ -94,6 +100,11 @@ class GitEntry:
             raise ManifestError(
                 f"bottle '{bottle_name}' git-gate.repos has an empty key"
             )
+        if not _GIT_NAME_RE.match(repo_name):
+            raise ManifestError(
+                f"bottle '{bottle_name}' git-gate.repos name {repo_name!r} is invalid; "
+                f"allowed characters: A-Z a-z 0-9 . _ -"
+            )
         label = f"git-gate.repos[{repo_name!r}]"
         d = as_json_object(raw, f"bottle '{bottle_name}' {label}")
         for k in d:

tests/unit/test_docker_launch_teardown.py

@@ -0,0 +1,145 @@
+"""Unit: Docker launch teardown warning on ExitStack failure (issue #156).
+
+When a callback registered in the ExitStack raises during teardown,
+the teardown function must emit a WARNING-level message that includes
+the container name and operation type, rather than silently discarding
+the exception.
+"""
+
+from __future__ import annotations
+
+import contextlib
+import io
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+from bot_bottle.agent_provider import AgentProvisionPlan
+from bot_bottle.backend import BottleSpec
+from bot_bottle.backend.docker import launch as launch_mod
+from bot_bottle.backend.docker.bottle_plan import DockerBottlePlan
+from bot_bottle.egress import EgressPlan
+from bot_bottle.git_gate import GitGatePlan
+from bot_bottle.manifest import Manifest
+from bot_bottle.pipelock import PipelockProxyPlan
+from bot_bottle.workspace import workspace_plan
+
+
+def _manifest() -> Manifest:
+    return Manifest.from_json_obj({
+        "bottles": {"dev": {}},
+        "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
+    })
+
+
+def _plan(tmp: str) -> DockerBottlePlan:
+    stage = Path(tmp)
+    manifest = _manifest()
+    spec = BottleSpec(
+        manifest=manifest,
+        agent_name="demo",
+        copy_cwd=False,
+        user_cwd=tmp,
+        identity="test-teardown-00001",
+    )
+    return DockerBottlePlan(
+        spec=spec,
+        stage_dir=stage,
+        git_gate_plan=GitGatePlan(
+            slug="test-teardown-00001",
+            entrypoint_script=stage / "entrypoint.sh",
+            hook_script=stage / "hook.sh",
+            access_hook_script=stage / "access-hook.sh",
+            upstreams=(),
+        ),
+        egress_plan=EgressPlan(
+            slug="test-teardown-00001",
+            routes_path=stage / "egress.yaml",
+            routes=(),
+            token_env_map={},
+        ),
+        supervise_plan=None,
+        agent_provision=AgentProvisionPlan(
+            template="claude",
+            command="claude",
+            prompt_mode="append_file",
+            image="",
+            dockerfile="",
+            guest_env={},
+        ),
+        workspace_plan=workspace_plan(spec, guest_home="/home/node"),
+        slug="test-teardown-00001",
+        container_name="bot-bottle-test-teardown-abc",
+        container_name_pinned=False,
+        image="bot-bottle-claude:latest",
+        derived_image="",
+        runtime_image="bot-bottle-claude:latest",
+        dockerfile_path="",
+        env_file=stage / "env",
+        forwarded_env={},
+        prompt_file=stage / "prompt.txt",
+        proxy_plan=PipelockProxyPlan(
+            yaml_path=stage / "pipelock.yaml",
+            slug="test-teardown-00001",
+        ),
+        use_runsc=False,
+    )
+
+
+class TestTeardownWarning(unittest.TestCase):
+    def setUp(self) -> None:
+        self._tmp = tempfile.mkdtemp(prefix="docker-launch-teardown-test.")
+
+    def tearDown(self) -> None:
+        import shutil
+        shutil.rmtree(self._tmp, ignore_errors=True)
+
+    def test_teardown_failure_emits_warning_with_container_and_operation(self):
+        plan = _plan(self._tmp)
+        buf = io.StringIO()
+
+        with mock.patch.object(launch_mod.docker_mod, "build_image"), \
+             mock.patch.object(
+                 launch_mod, "pipelock_tls_init",
+                 return_value=(Path("/ca.crt"), Path("/ca.key")),
+             ), \
+             mock.patch.object(
+                 launch_mod, "egress_tls_init",
+                 return_value=(Path("/egress_ca"), Path("/egress_cert")),
+             ), \
+             mock.patch.object(
+                 launch_mod.network_mod, "network_name_for_slug",
+                 return_value="bb-internal-test",
+             ), \
+             mock.patch.object(
+                 launch_mod.network_mod, "network_egress_name_for_slug",
+                 return_value="bb-egress-test",
+             ), \
+             mock.patch.object(
+                 launch_mod, "bottle_plan_to_compose",
+                 return_value={"services": {"agent": {}}},
+             ), \
+             mock.patch.object(
+                 launch_mod, "write_compose_file",
+                 return_value=Path("/tmp/compose.yml"),
+             ), \
+             mock.patch.object(launch_mod, "compose_up"), \
+             mock.patch.object(launch_mod, "compose_dump_logs"), \
+             mock.patch.object(
+                 launch_mod, "compose_down",
+                 side_effect=RuntimeError("network remove failed"),
+             ), \
+             contextlib.redirect_stderr(buf):
+            provision = mock.Mock(return_value=None)
+            with launch_mod.launch(plan, provision=provision):
+                pass
+
+        output = buf.getvalue()
+        self.assertIn("bot-bottle: warning:", output)
+        self.assertIn("bot-bottle-test-teardown-abc", output)
+        self.assertIn("compose-down", output)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/test_git_gate.py

@@ -76,14 +76,18 @@ class TestEntrypointRender(unittest.TestCase):
         )
         script = git_gate_render_entrypoint(ups)
         self.assertIn("#!/bin/sh", script)
-        self.assertIn(
-            "init_repo 'bot-bottle' "
-            "'ssh://git@gitea.dideric.is:30009/didericis/bot-bottle.git'",
-            script,
+        # shlex.quote leaves safe strings unquoted; verify via token parse.
+        import shlex as _shlex
+        lines_with_init = [l for l in script.splitlines() if l.startswith("init_repo ")]
+        self.assertEqual(2, len(lines_with_init))
+        self.assertEqual(
+            ["init_repo", "bot-bottle",
+             "ssh://git@gitea.dideric.is:30009/didericis/bot-bottle.git"],
+            _shlex.split(lines_with_init[0]),
         )
-        self.assertIn(
-            "init_repo 'foo' 'ssh://git@github.com/didericis/foo.git'",
-            script,
+        self.assertEqual(
+            ["init_repo", "foo", "ssh://git@github.com/didericis/foo.git"],
+            _shlex.split(lines_with_init[1]),
         )
         # Daemon line is what keeps PID 1 alive.
         self.assertIn("exec git daemon", script)
@@ -108,6 +112,41 @@ class TestEntrypointRender(unittest.TestCase):
         self.assertNotIn("init_repo '", script)
         self.assertIn("exec git daemon", script)
 
+    def test_single_quote_in_upstream_url_is_escaped(self):
+        ups = (GitGateUpstream(
+            name="myrepo",
+            upstream_url="ssh://git@host/path'with'quotes.git",
+            upstream_host="host",
+            upstream_port="22",
+            identity_file="/key",
+            known_host_key="",
+        ),)
+        script = git_gate_render_entrypoint(ups)
+        self.assertNotIn(
+            "init_repo 'myrepo' 'ssh://git@host/path'with'quotes.git'",
+            script,
+        )
+        self.assertIn("init_repo", script)
+        self.assertIn("path", script)
+
+    def test_space_and_semicolon_in_upstream_url_are_escaped(self):
+        import shlex as _shlex
+        raw_url = "ssh://git@host/path with spaces;evil.git"
+        ups = (GitGateUpstream(
+            name="myrepo",
+            upstream_url=raw_url,
+            upstream_host="host",
+            upstream_port="22",
+            identity_file="/key",
+            known_host_key="",
+        ),)
+        script = git_gate_render_entrypoint(ups)
+        line = next(l for l in script.splitlines() if l.startswith("init_repo "))
+        tokens = _shlex.split(line)
+        self.assertEqual(3, len(tokens))
+        self.assertEqual("myrepo", tokens[1])
+        self.assertEqual(raw_url, tokens[2])
+
 
 class TestHookRender(unittest.TestCase):
     def test_pre_receive_hook_has_two_phases(self):

tests/unit/test_manifest_git.py

@@ -185,6 +185,51 @@ class TestGitEntryCrossValidation(unittest.TestCase):
                 "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
             })
 
+    def test_name_with_single_quote_dies(self):
+        with self.assertRaises(ManifestError):
+            Manifest.from_json_obj(_manifest({
+                "o'reilly": {
+                    "url": "ssh://git@github.com/foo.git",
+                    "identity": "/dev/null",
+                },
+            }))
+
+    def test_name_with_space_dies(self):
+        with self.assertRaises(ManifestError):
+            Manifest.from_json_obj(_manifest({
+                "my repo": {
+                    "url": "ssh://git@github.com/foo.git",
+                    "identity": "/dev/null",
+                },
+            }))
+
+    def test_name_with_semicolon_dies(self):
+        with self.assertRaises(ManifestError):
+            Manifest.from_json_obj(_manifest({
+                "foo;bar": {
+                    "url": "ssh://git@github.com/foo.git",
+                    "identity": "/dev/null",
+                },
+            }))
+
+    def test_name_with_dollar_dies(self):
+        with self.assertRaises(ManifestError):
+            Manifest.from_json_obj(_manifest({
+                "foo$bar": {
+                    "url": "ssh://git@github.com/foo.git",
+                    "identity": "/dev/null",
+                },
+            }))
+
+    def test_valid_name_with_dots_and_hyphens_accepted(self):
+        m = Manifest.from_json_obj(_manifest({
+            "my.repo-name_1": {
+                "url": "ssh://git@github.com/foo.git",
+                "identity": "/dev/null",
+            },
+        }))
+        self.assertEqual("my.repo-name_1", m.bottles["dev"].git[0].Name)
+
     def test_legacy_git_key_dies_with_hint(self):
         msg = ""
         try: