{"id":4467,"date":"2025-08-09T14:52:40","date_gmt":"2025-08-09T14:52:40","guid":{"rendered":"https:\/\/uplatz.com\/blog\/?p=4467"},"modified":"2025-08-28T13:07:46","modified_gmt":"2025-08-28T13:07:46","slug":"anthropic-pocket-book","status":"publish","type":"post","link":"https:\/\/uplatz.com\/blog\/anthropic-pocket-book\/","title":{"rendered":"Anthropic Pocket Book"},"content":{"rendered":"<p><!-- Anthropic Pocket Book (Wide Layout, Readable Code, Scoped Styles) --><\/p>\n<div style=\"margin: 16px 0;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-4940\" src=\"https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/Anthropic-1024x576.jpg\" alt=\"\" width=\"840\" height=\"473\" srcset=\"https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/Anthropic-1024x576.jpg 1024w, https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/Anthropic-300x169.jpg 300w, https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/Anthropic-768x432.jpg 768w, https:\/\/uplatz.com\/blog\/wp-content\/uploads\/2025\/08\/Anthropic.jpg 1280w\" sizes=\"auto, (max-width: 840px) 100vw, 840px\" \/><\/p>\n<style>\n    .wp-anthropic-pb { font-family: Arial, sans-serif; max-width: 1320px; margin:0 auto; }<br \/>\n    .wp-anthropic-pb .heading{<br \/>\n      background: linear-gradient(135deg, #e0f2fe, #ccfbf1);<br \/>\n      color:#0f172a; padding:22px 24px; border-radius:14px;<br \/>\n      text-align:center; margin-bottom:18px; box-shadow:0 8px 20px rgba(0,0,0,.08);<br \/>\n      border:1px solid #cbd5e1;<br \/>\n    }<br \/>\n    .wp-anthropic-pb .heading h2{ margin:0; font-size:2.1rem; letter-spacing:.2px; }<br \/>\n    .wp-anthropic-pb .heading p{ margin:6px 0 0; font-size:1.02rem; opacity:.9; }<\/p>\n<p>    .wp-anthropic-pb .grid{<br \/>\n      display:grid; gap:14px;<br \/>\n      grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));<br \/>\n    }<br \/>\n    @media (min-width:1200px){<br \/>\n      .wp-anthropic-pb .grid{ grid-template-columns: repeat(3, 1fr); }<br \/>\n    }<\/p>\n<p>    .wp-anthropic-pb .section-title{<br \/>\n      grid-column:1\/-1; background:#f8fafc; border-left:8px solid #0ea5e9;<br \/>\n      padding:12px 16px; border-radius:10px; font-weight:700; color:#0f172a; font-size:1.08rem;<br \/>\n      box-shadow:0 2px 8px rgba(0,0,0,.05); border:1px solid #e2e8f0;<br \/>\n    }<br \/>\n    .wp-anthropic-pb .card{<br \/>\n      background:#ffffff; border-left:6px solid #0ea5e9;<br \/>\n      padding:18px; border-radius:12px;<br \/>\n      box-shadow:0 6px 14px rgba(0,0,0,.06);<br \/>\n      transition:transform .12s ease, box-shadow .12s ease;<br \/>\n      border:1px solid #e5e7eb;<br \/>\n    }<br \/>\n    .wp-anthropic-pb .card:hover{ transform: translateY(-3px); box-shadow:0 10px 22px rgba(0,0,0,.08); }<br \/>\n    .wp-anthropic-pb .card h3{ margin:0 0 10px; font-size:1.12rem; color:#0f172a; }<br \/>\n    .wp-anthropic-pb .card p{ margin:0; font-size:.96rem; color:#334155; line-height:1.62; }<\/p>\n<p>    \/* Colors *\/<br \/>\n    .bg-blue { border-left-color:#0ea5e9 !important; background:#f0f9ff !important; }<br \/>\n    .bg-green{ border-left-color:#10b981 !important; background:#f0fdf4 !important; }<br \/>\n    .bg-amber{ border-left-color:#f59e0b !important; background:#fffbeb !important; }<br \/>\n    .bg-violet{ border-left-color:#8b5cf6 !important; background:#f5f3ff !important; }<br \/>\n    .bg-rose{ border-left-color:#ef4444 !important; background:#fff1f2 !important; }<br \/>\n    .bg-cyan{ border-left-color:#06b6d4 !important; background:#ecfeff !important; }<br \/>\n    .bg-indigo{ border-left-color:#6366f1 !important; background:#eef2ff !important; }<\/p>\n<p>    \/* Utilities *\/<br \/>\n    .tight ul{ margin:0; padding-left:18px; }<br \/>\n    .tight li{ margin:4px 0; }<br \/>\n    .mono{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }<br \/>\n    .muted{ color:#64748b; }<br \/>\n    .wp-anthropic-pb code{ background:#f1f5f9; padding:0 4px; border-radius:4px; border:1px solid #e2e8f0; }<br \/>\n    .wp-anthropic-pb pre{<br \/>\n      background:#f5f5f5; color:#111827; border:1px solid #e5e7eb;<br \/>\n      padding:12px; border-radius:8px; overflow:auto; font-size:.92rem; line-height:1.55;<br \/>\n    }<br \/>\n    .q{font-weight:700;}<br \/>\n    .qa p{ margin:8px 0; }<br \/>\n    .qa b{ color:#0f172a; }<br \/>\n  <\/style>\n<div class=\"wp-anthropic-pb\">\n<div class=\"heading\">\n<h2>Anthropic Pocket Book<\/h2>\n<p>Claude models \u2022 Messages API \u2022 Prompting patterns \u2022 Safety &amp; filters \u2022 Tools &amp; function calls \u2022 Ops tips<\/p>\n<\/div>\n<div class=\"grid\"><!-- ===================== SECTION 1 ===================== --><\/p>\n<div class=\"section-title\">Section 1 \u2014 Fundamentals<\/div>\n<div class=\"card bg-blue\">\n<h3>1) What is Anthropic (Claude)?<\/h3>\n<p>Anthropic provides the <b>Claude<\/b> family of large language models for chat, knowledge tasks, coding, and agents. You access Claude via the <b>Messages API<\/b>, SDKs, and integrations. Core ideas: helpfulness, honesty, and safety-by-default.<\/p>\n<pre><code class=\"mono\"># Install Python SDK\r\npip install anthropic<\/code><\/pre>\n<\/div>\n<div class=\"card bg-green\">\n<h3>2) Key Concepts<\/h3>\n<ul class=\"tight\">\n<li><b>Model<\/b>: e.g., claude-3, claude-3.5 variants (pick for cost\/latency\/capability).<\/li>\n<li><b>Messages<\/b>: array of user\/assistant turns; you send, model responds.<\/li>\n<li><b>Tools<\/b>: declare functions the model can call; you execute and return results.<\/li>\n<li><b>System prompt<\/b>: sets persona, rules, and constraints for the session.<\/li>\n<\/ul>\n<\/div>\n<div class=\"card bg-amber\">\n<h3>3) Simple Completion (Python)<\/h3>\n<pre><code class=\"mono\">from anthropic import Anthropic\r\nclient = Anthropic(api_key=\"YOUR_ANTHROPIC_API_KEY\")\r\n\r\nresp = client.messages.create(\r\n  model=\"claude-3-opus-20240229\",\r\n  max_tokens=300,\r\n  messages=[{\"role\":\"user\",\"content\":\"Explain vector databases in 5 bullets.\"}]\r\n)\r\nprint(resp.content[0].text)<\/code><\/pre>\n<p class=\"muted\">Replace the model name with the current recommended one for your region\/tier.<\/p>\n<\/div>\n<div class=\"card bg-violet\">\n<h3>4) cURL Example<\/h3>\n<pre><code class=\"mono\">curl https:\/\/api.anthropic.com\/v1\/messages \\\r\n -H \"x-api-key: $ANTHROPIC_API_KEY\" \\\r\n -H \"content-type: application\/json\" \\\r\n -H \"anthropic-version: 2023-06-01\" \\\r\n -d '{\r\n  \"model\":\"claude-3-haiku-20240307\",\r\n  \"max_tokens\":200,\r\n  \"messages\":[{\"role\":\"user\",\"content\":\"Give me 3 tips to optimize a REST API.\"}]\r\n}'<\/code><\/pre>\n<\/div>\n<div class=\"card bg-rose\">\n<h3>5) System Prompt Pattern<\/h3>\n<p>Pin down tone, format, and boundaries up front.<\/p>\n<pre><code class=\"mono\">SYSTEM:\r\nYou are a concise technical assistant. Prefer bullet points, cite file names in code, and refuse unsafe requests.<\/code><\/pre>\n<\/div>\n<p><!-- ===================== SECTION 2 ===================== --><\/p>\n<div class=\"section-title\">Section 2 \u2014 Prompting, Tools &amp; Retrieval<\/div>\n<div class=\"card bg-blue\">\n<h3>6) Few-shot Prompting<\/h3>\n<p>Show short examples to steer style and structure. Keep examples minimal and domain-relevant.<\/p>\n<pre><code class=\"mono\">messages=[\r\n {\"role\":\"user\",\"content\":\"Format a changelog entry for: fix CORS issue\"},\r\n {\"role\":\"assistant\",\"content\":\"- fix(cors): allow credentials on \/api\/* (closes #123)\"},\r\n {\"role\":\"user\",\"content\":\"Format a changelog entry for: upgrade Node to 20.x\"}\r\n]<\/code><\/pre>\n<\/div>\n<div class=\"card bg-green\">\n<h3>7) Tool Use (Function Calling) \u2014 Pattern<\/h3>\n<p>Declare your tools\u2019 JSON schema; the model replies with a tool call. Your app executes it and returns results as a new message.<\/p>\n<pre><code class=\"mono\">tools=[{\r\n  \"name\":\"get_weather\",\r\n  \"description\":\"Get weather by city\",\r\n  \"input_schema\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"]}\r\n}]\r\n# Send messages with tools=tools; when response includes a tool call, run it and send the result back.<\/code><\/pre>\n<\/div>\n<div class=\"card bg-amber\">\n<h3>8) RAG (Retrieval-Augmented Generation)<\/h3>\n<p>Store documents in a vector DB (e.g., Pinecone, Weaviate, FAISS). At query time: embed \u2192 search \u2192 feed top chunks into the prompt.<\/p>\n<pre><code class=\"mono\">SYSTEM: Answer strictly from the provided context. If unknown, say so.\r\nCONTEXT:\r\n- [doc1] ...\r\n- [doc2] ...\r\nUSER: Summarize the key steps.<\/code><\/pre>\n<\/div>\n<div class=\"card bg-violet\">\n<h3>9) Structured Outputs (JSON)<\/h3>\n<p>Ask for strict JSON with a small schema; validate before use.<\/p>\n<pre><code class=\"mono\">USER: Extract fields as JSON: {\"title\":string,\"priority\":\"low|med|high\",\"tags\":string[]}<\/code><\/pre>\n<\/div>\n<div class=\"card bg-cyan\">\n<h3>10) Rate Limits &amp; Retries<\/h3>\n<p>Implement <b>exponential backoff<\/b> on 429\/5xx, and respect per-minute token limits. Log prompt\/response sizes to control costs.<\/p>\n<\/div>\n<p><!-- ===================== SECTION 3 ===================== --><\/p>\n<div class=\"section-title\">Section 3 \u2014 Safety, Policy &amp; Ops<\/div>\n<div class=\"card bg-blue\">\n<h3>11) Safety Filters<\/h3>\n<p>Design prompts to avoid unsafe content; handle refusals gracefully. Use allow\/deny lists and post-process outputs for your domain rules.<\/p>\n<\/div>\n<div class=\"card bg-green\">\n<h3>12) Secrets &amp; Keys<\/h3>\n<p>Store API keys in a secrets manager (e.g., AWS Secrets Manager). Never ship keys to the client; proxy through your backend for web apps.<\/p>\n<\/div>\n<div class=\"card bg-amber\">\n<h3>13) Observability<\/h3>\n<p>Log request IDs, latency, tokens, and user\/session correlation. Sample prompts\/responses (with redaction) to debug quality regressions.<\/p>\n<\/div>\n<div class=\"card bg-violet\">\n<h3>14) Cost Controls<\/h3>\n<ul class=\"tight\">\n<li>Choose smaller models for high-volume tasks; reserve larger for complex cases.<\/li>\n<li>Truncate context; summarize long threads; reuse short memory.<\/li>\n<li>Cache responses to frequent prompts; dedupe retries.<\/li>\n<\/ul>\n<\/div>\n<p><!-- ===================== SECTION 4 ===================== --><\/p>\n<div class=\"section-title\">Section 4 \u2014 Quick Q&amp;A<\/div>\n<div class=\"card bg-indigo qa\">\n<h3>15) Interview Q&amp;A \u2014 8 Quick Ones<\/h3>\n<p><b>1)<\/b> <i>Claude vs traditional NLP?<\/i> Foundation models generalize across tasks; prompt\/ground instead of bespoke pipelines.<\/p>\n<p><b>2)<\/b> <i>When to use tools?<\/i> For fresh data, calculations, or actions the model can\u2019t perform internally.<\/p>\n<p><b>3)<\/b> <i>Guardrails?<\/i> System prompts, content filters, schema validation, and allow\/deny rules.<\/p>\n<p><b>4)<\/b> <i>Reduce hallucinations?<\/i> Provide context, instruct to say \u201cdon\u2019t know,\u201d and verify with tools.<\/p>\n<p><b>5)<\/b> <i>Streaming?<\/i> Use SDK streaming to render tokens as they arrive for better UX.<\/p>\n<p><b>6)<\/b> <i>Eval quality?<\/i> Define task-specific metrics and golden datasets; run A\/B against baselines.<\/p>\n<p><b>7)<\/b> <i>Error handling?<\/i> Backoff on 429\/5xx, timeouts, and circuit breakers; surface actionable messages.<\/p>\n<p><b>8)<\/b> <i>Data privacy?<\/i> Don\u2019t send secrets unnecessarily; mask PII; follow org retention policies.<\/p>\n<\/div>\n<div class=\"card bg-rose\">\n<h3>16) Quick Starter (Node.js)<\/h3>\n<pre><code class=\"mono\">npm i @anthropic-ai\/sdk\r\nimport Anthropic from \"@anthropic-ai\/sdk\";\r\nconst client = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });\r\n\r\nconst resp = await client.messages.create({\r\n  model: \"claude-3-sonnet-20240229\",\r\n  max_tokens: 200,\r\n  messages: [{ role: \"user\", content: \"Summarize S3 lifecycle rules in 4 bullets.\" }]\r\n});\r\nconsole.log(resp.content[0].text);<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Anthropic Pocket Book Claude models \u2022 Messages API \u2022 Prompting patterns \u2022 Safety &amp; filters \u2022 Tools &amp; 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