Harden distributed pipeline

scimesh/worker/config.py

@@ -38,13 +38,14 @@ class WorkerConfig:
     cleanup_after_seconds: float | None = None
     max_tasks: int | None = None
     exit_when_idle: bool = False
+    # Distributed similarity-graph requires triangular block-pair planning and
+    # is deliberately not advertised until CTX-10. A normal worker must never
+    # make a multi-shard graph job appear scientifically complete.
     # The local CLI uses hyphens; the first coordinator contract used
-    # underscores. Advertise both stable spellings while jobs are migrated.
+    # underscores, so retain the search alias during migration.
     capabilities: tuple[str, ...] = (
         "similarity-search",
-        "similarity-graph",
         "similarity_search",
-        "similarity_graph",
     )
 
     def __post_init__(self) -> None:

scimesh/worker/daemon.py

@@ -7,6 +7,7 @@ from dataclasses import replace
 from dataclasses import dataclass
 from pathlib import Path
 import random
+import re
 import shutil
 import threading
 import time
@@ -199,7 +200,7 @@ class WorkerDaemon:
         return RunOnceOutcome(claimed=True, completed=completed)
 
     def _report_failure(self, task: ClaimedTask, error: Exception) -> None:
-        message = str(error).replace(str(self.config.work_dir), "<worker-dir>")[:300]
+        message = self._sanitize_error_message(error)
         try:
             self.coordinator.fail(task, {"worker_id": self._worker_id(), "attempt": task.attempt, "error_code": type(error).__name__, "error_message": message})
         except CoordinatorTransientError:
@@ -207,6 +208,16 @@ class WorkerDaemon:
         except Exception:
             self._log("failed", task, error_type="FailureReportError")
 
+    def _sanitize_error_message(self, error: Exception) -> str:
+        """Keep coordinator-visible failures useful without exposing local paths."""
+        message = str(error).replace(str(self.config.work_dir), "<worker-dir>")
+        # CalledProcessError includes the complete argv, including sys.executable
+        # outside work_dir. Replace POSIX and Windows absolute paths before the
+        # message reaches the coordinator database or operator UI.
+        message = re.sub(r"(?<![\w:])[A-Za-z]:\\[^\s'\"\],)]+", "<path>", message)
+        message = re.sub(r"(?<![\w:])/(?:[^\s'\"\],)]+)", "<path>", message)
+        return message[:300]
+
     def _register_worker(self) -> None:
         registered = self.coordinator.register(
             self.config.worker_name,