clade-data-handling

# Anthropic Data Handling ## Overview Handle data responsibly when building with Claude — manage the 200K token context window efficiently, implement conversation trimming strategies, redact PII before sending to the API, and configure data retention settings. ## Context Window Management Claude models have a 200K token context window. Managing it efficiently is critical. ```typescript // Count tokens before sending const count = await client.messages.countTokens({ model: 'claude-sonnet-4-20250514', messages, system: systemPrompt, }); // Budget: 200K total - max_tokens (output) = available input const MAX_CONTEXT = 200_000; const MAX_OUTPUT = 4096; const inputBudget = MAX_CONTEXT - MAX_OUTPUT; if (count.input_tokens > inputBudget) { // Trim oldest messages, keep system prompt + recent context messages = trimToFit(messages, inputBudget); } ``` ## Instructions ### Step 1: Conversation Trimming ```typescript function trimConversation(messages: MessageParam[], maxTokens: number): MessageParam[] { // Always keep the first message (often contains key context) // Keep the most recent messages // Drop middle turns first if (messages.length <= 4) return messages; const first = messages[0]; const recent = messages.slice(-6); // Last 3 turns return [first, ...recent]; } ``` ## PII Handling ```typescript // Strip PII before sending to Claude (if not needed for the task) function redactPII(text: string): string { return text .replace(/\b[\w._%+-]+@[...