Redact home paths in transcript views

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/adapter-utils/src/index.ts

@@ -22,3 +22,9 @@ export type {
   CLIAdapterModule,
   CreateConfigValues,
 } from "./types.js";
+export {
+  REDACTED_HOME_PATH_USER,
+  redactHomePathUserSegments,
+  redactHomePathUserSegmentsInValue,
+  redactTranscriptEntryPaths,
+} from "./log-redaction.js";

packages/adapter-utils/src/log-redaction.ts

@@ -0,0 +1,81 @@
+import type { TranscriptEntry } from "./types.js";
+
+export const REDACTED_HOME_PATH_USER = "[]";
+
+const HOME_PATH_PATTERNS = [
+  {
+    regex: /\/Users\/[^/\\\s]+/g,
+    replace: `/Users/${REDACTED_HOME_PATH_USER}`,
+  },
+  {
+    regex: /\/home\/[^/\\\s]+/g,
+    replace: `/home/${REDACTED_HOME_PATH_USER}`,
+  },
+  {
+    regex: /([A-Za-z]:\\Users\\)[^\\/\s]+/g,
+    replace: `$1${REDACTED_HOME_PATH_USER}`,
+  },
+] as const;
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  if (typeof value !== "object" || value === null || Array.isArray(value)) return false;
+  const proto = Object.getPrototypeOf(value);
+  return proto === Object.prototype || proto === null;
+}
+
+export function redactHomePathUserSegments(text: string): string {
+  let result = text;
+  for (const pattern of HOME_PATH_PATTERNS) {
+    result = result.replace(pattern.regex, pattern.replace);
+  }
+  return result;
+}
+
+export function redactHomePathUserSegmentsInValue<T>(value: T): T {
+  if (typeof value === "string") {
+    return redactHomePathUserSegments(value) as T;
+  }
+  if (Array.isArray(value)) {
+    return value.map((entry) => redactHomePathUserSegmentsInValue(entry)) as T;
+  }
+  if (!isPlainObject(value)) {
+    return value;
+  }
+
+  const redacted: Record<string, unknown> = {};
+  for (const [key, entry] of Object.entries(value)) {
+    redacted[key] = redactHomePathUserSegmentsInValue(entry);
+  }
+  return redacted as T;
+}
+
+export function redactTranscriptEntryPaths(entry: TranscriptEntry): TranscriptEntry {
+  switch (entry.kind) {
+    case "assistant":
+    case "thinking":
+    case "user":
+    case "stderr":
+    case "system":
+    case "stdout":
+      return { ...entry, text: redactHomePathUserSegments(entry.text) };
+    case "tool_call":
+      return { ...entry, name: redactHomePathUserSegments(entry.name), input: redactHomePathUserSegmentsInValue(entry.input) };
+    case "tool_result":
+      return { ...entry, content: redactHomePathUserSegments(entry.content) };
+    case "init":
+      return {
+        ...entry,
+        model: redactHomePathUserSegments(entry.model),
+        sessionId: redactHomePathUserSegments(entry.sessionId),
+      };
+    case "result":
+      return {
+        ...entry,
+        text: redactHomePathUserSegments(entry.text),
+        subtype: redactHomePathUserSegments(entry.subtype),
+        errors: entry.errors.map((error) => redactHomePathUserSegments(error)),
+      };
+    default:
+      return entry;
+  }
+}