feat(pipelock): enforce DLP body-scan hits by default

Adds bottle.egress.dlp_action ("block" | "warn", default block) and
wires it into pipelock as request_body_scanning.action. Pipelock's
own default is "warn", which previously meant claude-bottle detected
credential patterns in outbound bodies but forwarded the request
anyway.

The matching integration test posts a manifest env var shaped like
a GitHub PAT to api.anthropic.com via plain HTTP forward proxy so
pipelock can see the body. Pipelock answers 403 from its body-scan
layer instead of forwarding to the upstream.

Behavior change: bottles without an explicit egress.dlp_action now
block on body-scan hits. Set egress.dlp_action: "warn" to restore
the prior detect-only behavior.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

claude_bottle/manifest.py

@@ -79,31 +79,55 @@ class SshEntry:
         )
 
 
+DLP_ACTIONS = ("block", "warn")
+
+
 @dataclass(frozen=True)
 class BottleEgress:
     allowlist: tuple[str, ...] = ()
+    # Action pipelock takes when its DLP layer matches a credential
+    # pattern in a request body. "block" → 403 from the proxy, the
+    # request never leaves the egress network. "warn" → forward the
+    # request and emit a log line. Default is "block": detect-only
+    # would let real secrets escape under the agent's compromised
+    # tooling, which is the threat model claude-bottle was built for.
+    dlp_action: str = "block"
 
     @classmethod
     def from_dict(cls, bottle_name: str, raw: object) -> "BottleEgress":
         d = _as_json_object(raw, f"bottle '{bottle_name}' egress")
         allow = d.get("allowlist")
-        if allow is None:
-            return cls()
-        if not isinstance(allow, list):
-            die(
-                f"bottle '{bottle_name}' egress.allowlist must be an array "
-                f"(was {type(allow).__name__})"
-            )
         items: list[str] = []
-        allow_list = cast(list[object], allow)
-        for i, host in enumerate(allow_list):
-            if not isinstance(host, str):
+        if allow is not None:
+            if not isinstance(allow, list):
                 die(
-                    f"bottle '{bottle_name}' egress.allowlist[{i}] must be a string "
-                    f"(was {type(host).__name__})"
+                    f"bottle '{bottle_name}' egress.allowlist must be an array "
+                    f"(was {type(allow).__name__})"
                 )
-            items.append(host)
-        return cls(allowlist=tuple(items))
+            allow_list = cast(list[object], allow)
+            for i, host in enumerate(allow_list):
+                if not isinstance(host, str):
+                    die(
+                        f"bottle '{bottle_name}' egress.allowlist[{i}] must be a string "
+                        f"(was {type(host).__name__})"
+                    )
+                items.append(host)
+        dlp_action_raw = d.get("dlp_action")
+        if dlp_action_raw is None:
+            dlp_action = "block"
+        elif isinstance(dlp_action_raw, str):
+            if dlp_action_raw not in DLP_ACTIONS:
+                die(
+                    f"bottle '{bottle_name}' egress.dlp_action must be one of "
+                    f"{', '.join(DLP_ACTIONS)} (was {dlp_action_raw!r})"
+                )
+            dlp_action = dlp_action_raw
+        else:
+            die(
+                f"bottle '{bottle_name}' egress.dlp_action must be a string "
+                f"(was {type(dlp_action_raw).__name__})"
+            )
+        return cls(allowlist=tuple(items), dlp_action=dlp_action)
 
 
 @dataclass(frozen=True)

claude_bottle/pipelock.py

@@ -110,6 +110,12 @@ def pipelock_build_config(bottle: Bottle) -> dict[str, object]:
     if ip_cidrs:
         cfg["ssrf"] = {"ip_allowlist": ip_cidrs}
     cfg["dlp"] = {"include_defaults": True, "scan_env": True}
+    # Body-scan enforcement is a separate pipelock section (each DLP
+    # "surface" — body, MCP, response — has its own action). Pipelock's
+    # built-in default for request_body_scanning is "warn" (forward
+    # with a log line); claude-bottle's default is "block" so a hit
+    # actually stops the request from leaving the egress network.
+    cfg["request_body_scanning"] = {"action": bottle.egress.dlp_action}
     return cfg
 
 
@@ -149,6 +155,10 @@ def pipelock_render_yaml(cfg: dict[str, object]) -> str:
     dlp = cast(dict[str, object], cfg["dlp"])
     lines.append(f"  include_defaults: {_bool(dlp['include_defaults'])}")
     lines.append(f"  scan_env: {_bool(dlp['scan_env'])}")
+    lines.append("")
+    lines.append("request_body_scanning:")
+    rbs = cast(dict[str, object], cfg["request_body_scanning"])
+    lines.append(f'  action: "{rbs["action"]}"')
     return "\n".join(lines) + "\n"