init

utils/permissions/classifierShared.ts

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+/**
+ * Shared infrastructure for classifier-based permission systems.
+ *
+ * This module provides common types, schemas, and utilities used by both:
+ * - bashClassifier.ts (semantic Bash command matching)
+ * - yoloClassifier.ts (YOLO mode security classification)
+ */
+
+import type { BetaContentBlock } from '@anthropic-ai/sdk/resources/beta/messages.js'
+import type { z } from 'zod/v4'
+
+/**
+ * Extract tool use block from message content by tool name.
+ */
+export function extractToolUseBlock(
+  content: BetaContentBlock[],
+  toolName: string,
+): Extract<BetaContentBlock, { type: 'tool_use' }> | null {
+  const block = content.find(b => b.type === 'tool_use' && b.name === toolName)
+  if (!block || block.type !== 'tool_use') {
+    return null
+  }
+  return block
+}
+
+/**
+ * Parse and validate classifier response from tool use block.
+ * Returns null if parsing fails.
+ */
+export function parseClassifierResponse<T extends z.ZodTypeAny>(
+  toolUseBlock: Extract<BetaContentBlock, { type: 'tool_use' }>,
+  schema: T,
+): z.infer<T> | null {
+  const parseResult = schema.safeParse(toolUseBlock.input)
+  if (!parseResult.success) {
+    return null
+  }
+  return parseResult.data
+}