const{Fragment:e,jsx:n,jsxs:l}=arguments[0];function _createMdxContent(r){const s={a:"a",code:"code",figure:"figure",h1:"h1",h2:"h2",h3:"h3",hr:"hr",input:"input",li:"li",ol:"ol",p:"p",pre:"pre",span:"span",strong:"strong",table:"table",tbody:"tbody",td:"td",th:"th",thead:"thead",tr:"tr",ul:"ul",...r.components};return l(e,{children:[n(s.h1,{children:"Building AI Agents with Claude: The Complete Production Guide"}),"\n",n(s.p,{children:"Building production AI agents is not the same as building demos. A demo runs\nonce, succeeds on the happy path, and impresses the room. A production agent\nhandles 50,000 tickets, recovers from tool failures it has never seen before,\nstays within budget, and never accidentally charges a customer twice because\nthe state machine got confused. This guide covers the full picture — every\nlayer of architecture you need to ship a Claude agent that actually works."}),"\n",n(s.h2,{children:"The Fundamental Shift: Assistant vs. Embedded Agent"}),"\n",n(s.p,{children:"The most important concept in this guide is the distinction between Claude as\nan interactive assistant and Claude as an embedded product agent. The difference\nis not about which model you use or how clever your prompts are. It is\narchitectural."}),"\n",n(s.p,{children:n(s.strong,{children:"Claude as assistant (interactive):"})}),"\n",l(s.ul,{children:["\n",n(s.li,{children:"Human in the loop every turn"}),"\n",n(s.li,{children:"Short sessions (one conversation)"}),"\n",n(s.li,{children:"Errors are immediately visible and the human corrects them"}),"\n",n(s.li,{children:"State lives in the conversation history"}),"\n",n(s.li,{children:"Cost is predictable per conversation"}),"\n"]}),"\n",n(s.p,{children:n(s.strong,{children:"Claude as embedded agent (product):"})}),"\n",l(s.ul,{children:["\n",n(s.li,{children:"Runs autonomously for many turns before human review"}),"\n",n(s.li,{children:"Long-running sessions or persistent workflows"}),"\n",n(s.li,{children:"Errors compound silently unless you detect and handle them"}),"\n",n(s.li,{children:"State lives in your application layer, not the conversation"}),"\n",n(s.li,{children:"Cost can spiral without explicit budgets per workflow"}),"\n"]}),"\n",n(s.p,{children:"Most guides treat these the same. They are not. An agent embedded in a product\nhas to be engineered — not just prompted — for reliability. The rest of this\narticle is about how to do that."}),"\n",n(s.h2,{children:"When to Build an Agent vs. Use Direct API Calls"}),"\n",n(s.p,{children:"Before committing to an agent architecture, ask: does this task actually require\nan agentic loop?"}),"\n",n(s.p,{children:"An agentic loop is the right choice when:"}),"\n",l(s.ul,{children:["\n",l(s.li,{children:[n(s.strong,{children:"The task is multi-step and the steps are not fully known in advance."})," An\nagent can reason about what to do next based on tool results. A pipeline\nof hardcoded API calls cannot."]}),"\n",l(s.li,{children:[n(s.strong,{children:"The task requires tool use."})," Looking up data, triggering actions, or\nsearching for information based on the output of previous steps."]}),"\n",l(s.li,{children:[n(s.strong,{children:"The task benefits from self-correction."})," If a tool call fails, the agent\ncan try a different approach. A linear pipeline just fails."]}),"\n"]}),"\n",n(s.p,{children:"Direct API calls are the right choice when:"}),"\n",l(s.ul,{children:["\n",l(s.li,{children:[n(s.strong,{children:"The task is a single transform."})," Classify this text. Summarize this\ndocument. Translate this sentence. One call, one result."]}),"\n",l(s.li,{children:[n(s.strong,{children:"The output format is fixed."})," If you can describe the exact shape of the\noutput in a schema, force it with ",n(s.code,{children:"tool_choice"})," and skip the loop overhead."]}),"\n",l(s.li,{children:[n(s.strong,{children:"Latency is critical."})," Every loop iteration adds latency. For real-time\napplications, minimize iterations."]}),"\n"]}),"\n",n(s.p,{children:"The rule of thumb: if you can solve it with one or two API calls and structured\noutput, don't build an agent. If the task involves conditionals, tool results\nthat change what happens next, or recovering from failures — that is an agent."}),"\n",n(s.h2,{children:"The Three Fundamental Agent Patterns"}),"\n",n(s.h3,{children:"Pattern 1: Single-Task Agent"}),"\n",n(s.p,{children:"One agent, one job, one system prompt. The simplest and most reliable pattern."}),"\n",n(s.pre,{children:n(s.code,{children:"User request → Agent (tools) → Result\n"})}),"\n",n(s.p,{children:"Examples: customer support ticket handler, code reviewer, document summarizer,\ndata extraction pipeline. The agent has a fixed set of tools and a system\nprompt that precisely scopes what it does."}),"\n",n(s.p,{children:"Use this pattern as your default. The added complexity of multi-agent systems\nonly pays off in specific situations."}),"\n",n(s.h3,{children:"Pattern 2: Multi-Step Pipeline"}),"\n",n(s.p,{children:"A sequence of agents where the output of each becomes the input of the next.\nNo agent talks to another — they communicate through your application layer."}),"\n",n(s.pre,{children:n(s.code,{children:"Stage 1 Agent → Output A\nOutput A → Stage 2 Agent → Output B\nOutput B → Stage 3 Agent → Final result\n"})}),"\n",n(s.p,{children:"Examples: content pipeline (research → outline → draft → review), data\nprocessing pipeline (extract → validate → transform → load), code generation\npipeline (plan → implement → test → document)."}),"\n",n(s.p,{children:"The key advantage over a single agent: each stage has a scoped context. The\nresearch agent does not need to know about the writing style guidelines. The\nreviewer agent does not need to know how the research was done. Scoped context\nmeans cheaper calls and more focused outputs."}),"\n",n(s.h3,{children:"Pattern 3: Multi-Agent Team"}),"\n",n(s.p,{children:"An orchestrator agent coordinates specialist subagents. The orchestrator\nreasons about what needs to happen; the specialists do the domain work."}),"\n",n(s.pre,{children:n(s.code,{children:"Orchestrator\n ├─ Specialist A (research)\n ├─ Specialist B (analysis)\n └─ Specialist C (writing)\n"})}),"\n",n(s.p,{children:"Examples: a SaaS platform where different agents own different domains (billing,\ntechnical support, account management), a research system that fans out to\nmultiple sources in parallel, a software development pipeline where an\norchestrator dispatches feature stories to implementation agents."}),"\n",n(s.p,{children:"This pattern is significantly more expensive than the other two. The orchestrator\nitself consumes tokens on every dispatch decision. Use it when parallelism,\nspecialization, or context window limits genuinely require it — not by default."}),"\n",n(s.h2,{children:"Tool Definition Best Practices"}),"\n",n(s.p,{children:"Tools are the interface between Claude's reasoning and your system. A\nwell-designed tool definition is precise enough that Claude uses it correctly,\nand well-implemented enough that bad inputs fail safely."}),"\n",n(s.h3,{children:"Define Schemas with Zod, Not Raw JSON"}),"\n",n(s.p,{children:"Never write JSON Schema by hand for tool definitions. Define the schema in Zod,\nderive the JSON Schema from it, and validate all inputs and outputs against the\nsame types."}),"\n",n(s.figure,{"data-rehype-pretty-code-figure":"",children:n(s.pre,{tabIndex:"0","data-language":"typescript","data-theme":"github-dark-dimmed",children:l(s.code,{"data-language":"typescript","data-theme":"github-dark-dimmed",style:{display:"grid"},children:[l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"import"}),n(s.span,{style:{color:"#ADBAC7"},children:" { z } "}),n(s.span,{style:{color:"#F47067"},children:"from"}),n(s.span,{style:{color:"#96D0FF"},children:' "zod"'}),n(s.span,{style:{color:"#ADBAC7"},children:";"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"import"}),n(s.span,{style:{color:"#ADBAC7"},children:" zodToJsonSchema "}),n(s.span,{style:{color:"#F47067"},children:"from"}),n(s.span,{style:{color:"#96D0FF"},children:' "zod-to-json-schema"'}),n(s.span,{style:{color:"#ADBAC7"},children:";"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"import"}),n(s.span,{style:{color:"#ADBAC7"},children:" Anthropic "}),n(s.span,{style:{color:"#F47067"},children:"from"}),n(s.span,{style:{color:"#96D0FF"},children:' "@anthropic-ai/sdk"'}),n(s.span,{style:{color:"#ADBAC7"},children:";"})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:"// Input schema — used to generate the tool definition AND validate Claude's input"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"const"}),n(s.span,{style:{color:"#6CB6FF"},children:" SearchKnowledgeBaseInput"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#ADBAC7"},children:" z."}),n(s.span,{style:{color:"#DCBDFB"},children:"object"}),n(s.span,{style:{color:"#ADBAC7"},children:"({"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" query: z"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"string"}),n(s.span,{style:{color:"#ADBAC7"},children:"()"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"min"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#6CB6FF"},children:"3"}),n(s.span,{style:{color:"#ADBAC7"},children:")"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"max"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#6CB6FF"},children:"500"}),n(s.span,{style:{color:"#ADBAC7"},children:")"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"describe"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#96D0FF"},children:'"The search query. Be specific — broad queries return poor results."'}),n(s.span,{style:{color:"#ADBAC7"},children:"),"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" max_results: z"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"number"}),n(s.span,{style:{color:"#ADBAC7"},children:"()"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"int"}),n(s.span,{style:{color:"#ADBAC7"},children:"()"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"min"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#6CB6FF"},children:"1"}),n(s.span,{style:{color:"#ADBAC7"},children:")"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"max"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#6CB6FF"},children:"20"}),n(s.span,{style:{color:"#ADBAC7"},children:")"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"default"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#6CB6FF"},children:"5"}),n(s.span,{style:{color:"#ADBAC7"},children:")"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"describe"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#96D0FF"},children:'"Number of results to return. Default is 5."'}),n(s.span,{style:{color:"#ADBAC7"},children:"),"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" filter_category: z"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"enum"}),n(s.span,{style:{color:"#ADBAC7"},children:"(["}),n(s.span,{style:{color:"#96D0FF"},children:'"docs"'}),n(s.span,{style:{color:"#ADBAC7"},children:", "}),n(s.span,{style:{color:"#96D0FF"},children:'"faq"'}),n(s.span,{style:{color:"#ADBAC7"},children:", "}),n(s.span,{style:{color:"#96D0FF"},children:'"tickets"'}),n(s.span,{style:{color:"#ADBAC7"},children:", "}),n(s.span,{style:{color:"#96D0FF"},children:'"policies"'}),n(s.span,{style:{color:"#ADBAC7"},children:"])"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"optional"}),n(s.span,{style:{color:"#ADBAC7"},children:"()"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" ."}),n(s.span,{style:{color:"#DCBDFB"},children:"describe"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#96D0FF"},children:'"Optional: restrict search to a specific content category."'}),n(s.span,{style:{color:"#ADBAC7"},children:"),"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:"});"})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:"// Output schema — validates what your implementation returns"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"const"}),n(s.span,{style:{color:"#6CB6FF"},children:" SearchKnowledgeBaseOutput"}),n(s.span,{style:{color:"#F47067"},children:" 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z."}),n(s.span,{style:{color:"#DCBDFB"},children:"string"}),n(s.span,{style:{color:"#ADBAC7"},children:"(),"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" source: z."}),n(s.span,{style:{color:"#DCBDFB"},children:"string"}),n(s.span,{style:{color:"#ADBAC7"},children:"(),"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" relevance_score: z."}),n(s.span,{style:{color:"#DCBDFB"},children:"number"}),n(s.span,{style:{color:"#ADBAC7"},children:"()."}),n(s.span,{style:{color:"#DCBDFB"},children:"min"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#6CB6FF"},children:"0"}),n(s.span,{style:{color:"#ADBAC7"},children:")."}),n(s.span,{style:{color:"#DCBDFB"},children:"max"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#6CB6FF"},children:"1"}),n(s.span,{style:{color:"#ADBAC7"},children:"),"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" })"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" ),"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" total_found: z."}),n(s.span,{style:{color:"#DCBDFB"},children:"number"}),n(s.span,{style:{color:"#ADBAC7"},children:"(),"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:"});"})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"type"}),n(s.span,{style:{color:"#F69D50"},children:" SearchInput"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#F69D50"},children:" z"}),n(s.span,{style:{color:"#ADBAC7"},children:"."}),n(s.span,{style:{color:"#F69D50"},children:"infer"}),n(s.span,{style:{color:"#ADBAC7"},children:"<"}),n(s.span,{style:{color:"#F47067"},children:"typeof"}),n(s.span,{style:{color:"#ADBAC7"},children:" SearchKnowledgeBaseInput>;"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"type"}),n(s.span,{style:{color:"#F69D50"},children:" SearchOutput"}),n(s.span,{style:{color:"#F47067"},children:" 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"'}),n(s.span,{style:{color:"#F47067"},children:" +"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#96D0FF"},children:' "Call this before answering any product-specific question. "'}),n(s.span,{style:{color:"#F47067"},children:" +"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#96D0FF"},children:' "Do NOT call this for order lookups — use lookup_order instead."'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" input_schema: "}),n(s.span,{style:{color:"#DCBDFB"},children:"zodToJsonSchema"}),n(s.span,{style:{color:"#ADBAC7"},children:"(SearchKnowledgeBaseInput) "}),n(s.span,{style:{color:"#F47067"},children:"as"}),n(s.span,{style:{color:"#F69D50"},children:" Anthropic"}),n(s.span,{style:{color:"#ADBAC7"},children:"."}),n(s.span,{style:{color:"#F69D50"},children:"Tool"}),n(s.span,{style:{color:"#ADBAC7"},children:"["}),n(s.span,{style:{color:"#96D0FF"},children:'"input_schema"'}),n(s.span,{style:{color:"#ADBAC7"},children:"],"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:"};"})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:"// Implementation with validated I/O"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"async"}),n(s.span,{style:{color:"#F47067"},children:" function"}),n(s.span,{style:{color:"#DCBDFB"},children:" searchKnowledgeBase"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#F69D50"},children:"rawInput"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" unknown"}),n(s.span,{style:{color:"#ADBAC7"},children:")"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#F69D50"},children:" Promise"}),n(s.span,{style:{color:"#ADBAC7"},children:"<"}),n(s.span,{style:{color:"#6CB6FF"},children:"string"}),n(s.span,{style:{color:"#ADBAC7"},children:"> {"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" const"}),n(s.span,{style:{color:"#6CB6FF"},children:" input"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#ADBAC7"},children:" SearchKnowledgeBaseInput."}),n(s.span,{style:{color:"#DCBDFB"},children:"parse"}),n(s.span,{style:{color:"#ADBAC7"},children:"(rawInput); "}),n(s.span,{style:{color:"#768390"},children:"// throws on schema mismatch"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" const"}),n(s.span,{style:{color:"#6CB6FF"},children:" raw"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#F47067"},children:" await"}),n(s.span,{style:{color:"#DCBDFB"},children:" vectorSearch"}),n(s.span,{style:{color:"#ADBAC7"},children:"(input.query, input.max_results, input.filter_category);"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" const"}),n(s.span,{style:{color:"#6CB6FF"},children:" output"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#ADBAC7"},children:" SearchKnowledgeBaseOutput."}),n(s.span,{style:{color:"#DCBDFB"},children:"parse"}),n(s.span,{style:{color:"#ADBAC7"},children:"(raw); "}),n(s.span,{style:{color:"#768390"},children:"// throws on unexpected DB output"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" return"}),n(s.span,{style:{color:"#6CB6FF"},children:" JSON"}),n(s.span,{style:{color:"#ADBAC7"},children:"."}),n(s.span,{style:{color:"#DCBDFB"},children:"stringify"}),n(s.span,{style:{color:"#ADBAC7"},children:"(output);"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:"}"})})]})})}),"\n",n(s.p,{children:"This catches two distinct failure modes: Claude occasionally generates tool\ncalls that don't match the schema, and your data layer occasionally returns\nunexpected shapes. Both become immediate, descriptive errors rather than silent\nmisbehavior."}),"\n",n(s.h3,{children:"Tool Description Quality"}),"\n",n(s.p,{children:"Claude uses the description — not just the schema — to decide when and whether\nto call a tool. Descriptions that are too vague cause missed calls. Descriptions\nthat overlap with other tools cause incorrect calls."}),"\n",n(s.figure,{"data-rehype-pretty-code-figure":"",children:n(s.pre,{tabIndex:"0","data-language":"typescript","data-theme":"github-dark-dimmed",children:l(s.code,{"data-language":"typescript","data-theme":"github-dark-dimmed",style:{display:"grid"},children:[n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:"// Bad — vague, no trigger conditions, no exclusions"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:"description"}),n(s.span,{style:{color:"#ADBAC7"},children:": "}),n(s.span,{style:{color:"#96D0FF"},children:'"Get customer information"'})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:"// Good — precise trigger, explicit exclusions, helps Claude pick correctly"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:"description"}),n(s.span,{style:{color:"#ADBAC7"},children:":"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#96D0FF"},children:' "Fetch account details for a customer: subscription tier, payment method, "'}),n(s.span,{style:{color:"#F47067"},children:" +"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#96D0FF"},children:' "account status, and billing history. Call this when the user asks about their "'}),n(s.span,{style:{color:"#F47067"},children:" +"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#96D0FF"},children:' "account, subscription, payment method, or billing address. "'}),n(s.span,{style:{color:"#F47067"},children:" +"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:' "Do NOT call this for order status — use lookup_order instead."'})})]})})}),"\n",l(s.p,{children:["The ",n(s.code,{children:"Do NOT call this for X"})," pattern is particularly effective when you have\nmultiple tools with similar-sounding names."]}),"\n",n(s.h3,{children:"The Allow-List Pattern for Dangerous Tools"}),"\n",n(s.p,{children:"Any tool that writes, deletes, or triggers financial transactions belongs on\nan explicit allow-list. The agent can see the tool and reason about calling it,\nbut your executor decides whether to actually run it."}),"\n",n(s.figure,{"data-rehype-pretty-code-figure":"",children:n(s.pre,{tabIndex:"0","data-language":"typescript","data-theme":"github-dark-dimmed",children:l(s.code,{"data-language":"typescript","data-theme":"github-dark-dimmed",style:{display:"grid"},children:[l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"type"}),n(s.span,{style:{color:"#F69D50"},children:" ToolPermission"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#96D0FF"},children:' "read"'}),n(s.span,{style:{color:"#F47067"},children:" |"}),n(s.span,{style:{color:"#96D0FF"},children:' "write"'}),n(s.span,{style:{color:"#F47067"},children:" |"}),n(s.span,{style:{color:"#96D0FF"},children:' "dangerous"'}),n(s.span,{style:{color:"#ADBAC7"},children:";"})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"const"}),n(s.span,{style:{color:"#6CB6FF"},children:" TOOL_PERMISSIONS"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#F69D50"},children:" Record"}),n(s.span,{style:{color:"#ADBAC7"},children:"<"}),n(s.span,{style:{color:"#6CB6FF"},children:"string"}),n(s.span,{style:{color:"#ADBAC7"},children:", "}),n(s.span,{style:{color:"#F69D50"},children:"ToolPermission"}),n(s.span,{style:{color:"#ADBAC7"},children:"> "}),n(s.span,{style:{color:"#F47067"},children:"="}),n(s.span,{style:{color:"#ADBAC7"},children:" {"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" search_knowledge_base: "}),n(s.span,{style:{color:"#96D0FF"},children:'"read"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" lookup_order: "}),n(s.span,{style:{color:"#96D0FF"},children:'"read"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" lookup_refund_eligibility: "}),n(s.span,{style:{color:"#96D0FF"},children:'"read"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" escalate_ticket: "}),n(s.span,{style:{color:"#96D0FF"},children:'"write"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" send_notification: "}),n(s.span,{style:{color:"#96D0FF"},children:'"write"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" issue_refund: "}),n(s.span,{style:{color:"#96D0FF"},children:'"dangerous"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" cancel_subscription: "}),n(s.span,{style:{color:"#96D0FF"},children:'"dangerous"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" delete_account: "}),n(s.span,{style:{color:"#96D0FF"},children:'"dangerous"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:"};"})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"async"}),n(s.span,{style:{color:"#F47067"},children:" function"}),n(s.span,{style:{color:"#DCBDFB"},children:" dispatchToolCall"}),n(s.span,{style:{color:"#ADBAC7"},children:"("})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:" toolName"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" string"}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:" input"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" unknown"}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:" context"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#ADBAC7"},children:" { "}),n(s.span,{style:{color:"#F69D50"},children:"sessionId"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" string"}),n(s.span,{style:{color:"#ADBAC7"},children:"; "}),n(s.span,{style:{color:"#F69D50"},children:"operatorApproved"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" boolean"}),n(s.span,{style:{color:"#ADBAC7"},children:" }"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:")"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#F69D50"},children:" Promise"}),n(s.span,{style:{color:"#ADBAC7"},children:"<"}),n(s.span,{style:{color:"#6CB6FF"},children:"string"}),n(s.span,{style:{color:"#ADBAC7"},children:"> {"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" const"}),n(s.span,{style:{color:"#6CB6FF"},children:" permission"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#6CB6FF"},children:" TOOL_PERMISSIONS"}),n(s.span,{style:{color:"#ADBAC7"},children:"[toolName];"})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" if"}),n(s.span,{style:{color:"#ADBAC7"},children:" (permission "}),n(s.span,{style:{color:"#F47067"},children:"==="}),n(s.span,{style:{color:"#6CB6FF"},children:" undefined"}),n(s.span,{style:{color:"#ADBAC7"},children:") {"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:" // Unknown tool — this is a bug in your tool setup"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" throw"}),n(s.span,{style:{color:"#F47067"},children:" new"}),n(s.span,{style:{color:"#DCBDFB"},children:" Error"}),n(s.span,{style:{color:"#ADBAC7"},children:"("}),n(s.span,{style:{color:"#96D0FF"},children:"`Unknown tool requested: ${"}),n(s.span,{style:{color:"#ADBAC7"},children:"toolName"}),n(s.span,{style:{color:"#96D0FF"},children:"}`"}),n(s.span,{style:{color:"#ADBAC7"},children:");"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" }"})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" if"}),n(s.span,{style:{color:"#ADBAC7"},children:" (permission "}),n(s.span,{style:{color:"#F47067"},children:"==="}),n(s.span,{style:{color:"#96D0FF"},children:' "dangerous"'}),n(s.span,{style:{color:"#F47067"},children:" &&"}),n(s.span,{style:{color:"#F47067"},children:" !"}),n(s.span,{style:{color:"#ADBAC7"},children:"context.operatorApproved) {"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:" // Route to HITL queue — do not execute"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" return"}),n(s.span,{style:{color:"#F47067"},children:" await"}),n(s.span,{style:{color:"#DCBDFB"},children:" requestHITLApproval"}),n(s.span,{style:{color:"#ADBAC7"},children:"(toolName, input, context.sessionId);"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" }"})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" return"}),n(s.span,{style:{color:"#F47067"},children:" await"}),n(s.span,{style:{color:"#DCBDFB"},children:" executeToolImpl"}),n(s.span,{style:{color:"#ADBAC7"},children:"(toolName, input);"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:"}"})})]})})}),"\n",l(s.p,{children:["The ",n(s.code,{children:"operatorApproved"})," flag is set when a human explicitly approves the action\nthrough your HITL interface. The agent never self-approves dangerous tools."]}),"\n",n(s.h2,{children:"System Prompt Design for Long-Running Tasks"}),"\n",n(s.p,{children:"The system prompt for a production agent is not the same as a chatbot instruction.\nIt is a specification document that the agent reads at the start of every turn."}),"\n",n(s.p,{children:n(s.strong,{children:"What belongs in the system prompt:"})}),"\n",l(s.ol,{children:["\n",l(s.li,{children:[n(s.strong,{children:"Role and scope"})," — what this agent is and is not responsible for"]}),"\n",l(s.li,{children:[n(s.strong,{children:"Capabilities"})," — which tools it has and when to use each"]}),"\n",l(s.li,{children:[n(s.strong,{children:"Hard constraints"})," — things it must never do, expressed as rules"]}),"\n",l(s.li,{children:[n(s.strong,{children:"Tone and output format"})," — how to write responses for this context"]}),"\n",l(s.li,{children:[n(s.strong,{children:"Escalation triggers"})," — specific conditions that require human review"]}),"\n",l(s.li,{children:[n(s.strong,{children:"Error handling instructions"})," — what to do when tools fail"]}),"\n"]}),"\n",n(s.figure,{"data-rehype-pretty-code-figure":"",children:n(s.pre,{tabIndex:"0","data-language":"typescript","data-theme":"github-dark-dimmed",children:l(s.code,{"data-language":"typescript","data-theme":"github-dark-dimmed",style:{display:"grid"},children:[l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"function"}),n(s.span,{style:{color:"#DCBDFB"},children:" buildSystemPrompt"}),n(s.span,{style:{color:"#ADBAC7"},children:"("})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:" knowledgeContext"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" string"}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:" userProfile"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#ADBAC7"},children:" { "}),n(s.span,{style:{color:"#F69D50"},children:"tier"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" string"}),n(s.span,{style:{color:"#ADBAC7"},children:"; "}),n(s.span,{style:{color:"#F69D50"},children:"name"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" string"}),n(s.span,{style:{color:"#ADBAC7"},children:" }"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:")"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" string"}),n(s.span,{style:{color:"#ADBAC7"},children:" {"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" return"}),n(s.span,{style:{color:"#96D0FF"},children:" `You are a support agent for Acme Corp, handling ${"}),n(s.span,{style:{color:"#ADBAC7"},children:"userProfile"}),n(s.span,{style:{color:"#96D0FF"},children:"."}),n(s.span,{style:{color:"#ADBAC7"},children:"tier"}),n(s.span,{style:{color:"#96D0FF"},children:"} tier customers."})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"ROLE:"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"Your job is to resolve customer issues accurately and efficiently."})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"You are the first point of contact. 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Escalate what you can't."})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"CAPABILITIES:"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"- search_knowledge_base: search docs, FAQs, and resolved tickets for context"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"- lookup_order: retrieve order status, items, and shipping details"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"- lookup_refund_eligibility: check whether an order qualifies for a refund"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"- issue_refund: trigger a refund (requires operator approval — call it and wait)"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"- escalate_ticket: route to a human agent with a summary and context"})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"HARD CONSTRAINTS:"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#96D0FF"},children:"- Only state facts from the knowledge base or tool results. 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Claude is surprisingly good at\nthis — it will often rephrase a query or use a different tool."]}),"\n"]}),"\n",l(s.li,{children:["\n",l(s.p,{children:[l(s.strong,{children:["The ",n(s.code,{children:"maxIterations"})," guard is mandatory."]})," Without it, a tool that\nconsistently returns errors will spin the agent forever, consuming tokens\nand costing money. 15 is a sensible default; adjust based on your task."]}),"\n"]}),"\n",l(s.li,{children:["\n",l(s.p,{children:[n(s.strong,{children:"Append the full assistant turn before tool results."})," The conversation\nhistory must alternate: user, assistant, user, assistant. Appending all\ntool results in a single user turn (even when there were multiple tool\ncalls in one assistant turn) keeps this structure correct."]}),"\n"]}),"\n"]}),"\n",n(s.h2,{children:"State Persistence Across Sessions"}),"\n",n(s.p,{children:"Claude has no persistent memory by default. 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Keep it in your application layer\nand inject the current snapshot on each turn. 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Most agents need the first two.\nCross-session memory is only worth the complexity if users genuinely benefit\nfrom the agent "remembering" them across sessions.'}),"\n",n(s.h2,{children:"Model Selection by Role"}),"\n",n(s.p,{children:"Claude Haiku is approximately 10-20x cheaper than Sonnet per token and\nmeaningfully faster. In a multi-step agent, running every step through Sonnet\nis one of the easiest ways to overspend."}),"\n",n(s.p,{children:"The heuristic: Haiku for pattern matching, classification, and structured\noutput extraction; Sonnet for multi-step reasoning, complex tool orchestration,\nand tasks where nuanced judgment matters."}),"\n",n(s.figure,{"data-rehype-pretty-code-figure":"",children:n(s.pre,{tabIndex:"0","data-language":"typescript","data-theme":"github-dark-dimmed",children:l(s.code,{"data-language":"typescript","data-theme":"github-dark-dimmed",style:{display:"grid"},children:[l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"const"}),n(s.span,{style:{color:"#6CB6FF"},children:" MODEL_BY_ROLE"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#ADBAC7"},children:" {"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:" // Guardrails — binary classification, no reasoning needed"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" inputGuardrail: "}),n(s.span,{style:{color:"#96D0FF"},children:'"claude-haiku-4-5"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" outputGuardrail: "}),n(s.span,{style:{color:"#96D0FF"},children:'"claude-haiku-4-5"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:" // Triage — structured JSON output, pattern recognition"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" triage: "}),n(s.span,{style:{color:"#96D0FF"},children:'"claude-haiku-4-5"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" intentClassification: "}),n(s.span,{style:{color:"#96D0FF"},children:'"claude-haiku-4-5"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:" // Main agent — multi-step tool chaining, judgment calls"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" mainAgent: "}),n(s.span,{style:{color:"#96D0FF"},children:'"claude-sonnet-4-5"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:" // Summarization at session end for memory — structured output"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" memorySummarizer: "}),n(s.span,{style:{color:"#96D0FF"},children:'"claude-haiku-4-5"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#768390"},children:" // Confidence scoring for HITL routing — yes/no"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" confidenceCheck: "}),n(s.span,{style:{color:"#96D0FF"},children:'"claude-haiku-4-5"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:"} "}),n(s.span,{style:{color:"#F47067"},children:"as"}),n(s.span,{style:{color:"#F47067"},children:" const"}),n(s.span,{style:{color:"#ADBAC7"},children:";"})]})]})})}),"\n",n(s.p,{children:"In a high-volume production system, routing everything except the main agent\nto Haiku can cut inference costs by 60-80% with negligible quality loss on\nthose non-reasoning steps."}),"\n",n(s.h2,{children:"HITL Checkpoint Design"}),"\n",n(s.p,{children:"Human-in-the-loop is not a fallback for failures. It is a first-class\narchitectural component. Design for it from the beginning."}),"\n",n(s.p,{children:"There are four types of events that warrant a HITL checkpoint:"}),"\n",l(s.ol,{children:["\n",l(s.li,{children:[n(s.strong,{children:"Irreversibility"})," — any action that cannot be undone (financial\ntransactions, deletions, bulk email sends)"]}),"\n",l(s.li,{children:[n(s.strong,{children:"Policy thresholds"})," — actions above a defined limit (refunds over $500,\naccount access changes)"]}),"\n",l(s.li,{children:[n(s.strong,{children:"Low confidence"})," — the agent expresses uncertainty or the situation is\nambiguous"]}),"\n",l(s.li,{children:[n(s.strong,{children:"Anomaly"})," — unusual request patterns for this user or context"]}),"\n"]}),"\n",n(s.figure,{"data-rehype-pretty-code-figure":"",children:n(s.pre,{tabIndex:"0","data-language":"typescript","data-theme":"github-dark-dimmed",children:l(s.code,{"data-language":"typescript","data-theme":"github-dark-dimmed",style:{display:"grid"},children:[l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"type"}),n(s.span,{style:{color:"#F69D50"},children:" HITLEvent"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#ADBAC7"},children:" {"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:" id"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" string"}),n(s.span,{style:{color:"#ADBAC7"},children:";"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F69D50"},children:" sessionId"}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#6CB6FF"},children:" 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A Next.js page\nshowing the conversation, the pending action, and Approve / Reject / Edit\nbuttons handles 90% of cases. What matters is that the queue is checked on a\nknown schedule and that timeouts exist — an action that sits unapproved for\n24 hours needs a fallback path."}),"\n",n(s.h2,{children:"Cost Architecture"}),"\n",n(s.p,{children:"Unbudgeted agent costs will surprise you in production. Here are the levers\nyou control and how to use them."}),"\n",n(s.p,{children:n(s.strong,{children:"Token budgets per workflow:"})}),"\n",n(s.p,{children:"Set a hard token limit per workflow, not just per call. 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Focus on decisions made, facts confirmed, and actions taken."'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" },"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" ],"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" });"})}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" const"}),n(s.span,{style:{color:"#6CB6FF"},children:" summary"}),n(s.span,{style:{color:"#F47067"},children:" ="})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" summaryResponse.content["}),n(s.span,{style:{color:"#6CB6FF"},children:"0"}),n(s.span,{style:{color:"#ADBAC7"},children:"].type "}),n(s.span,{style:{color:"#F47067"},children:"==="}),n(s.span,{style:{color:"#96D0FF"},children:' "text"'}),n(s.span,{style:{color:"#F47067"},children:" ?"}),n(s.span,{style:{color:"#ADBAC7"},children:" summaryResponse.content["}),n(s.span,{style:{color:"#6CB6FF"},children:"0"}),n(s.span,{style:{color:"#ADBAC7"},children:"].text "}),n(s.span,{style:{color:"#F47067"},children:":"}),n(s.span,{style:{color:"#96D0FF"},children:' ""'}),n(s.span,{style:{color:"#ADBAC7"},children:";"})]}),"\n",n(s.span,{"data-line":"",children:" "}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" return"}),n(s.span,{style:{color:"#ADBAC7"},children:" ["})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" { role: "}),n(s.span,{style:{color:"#96D0FF"},children:'"user"'}),n(s.span,{style:{color:"#ADBAC7"},children:", content: "}),n(s.span,{style:{color:"#96D0FF"},children:"`[EARLIER CONVERSATION SUMMARY]"}),n(s.span,{style:{color:"#F47067"},children:"\\n"}),n(s.span,{style:{color:"#96D0FF"},children:"${"}),n(s.span,{style:{color:"#ADBAC7"},children:"summary"}),n(s.span,{style:{color:"#96D0FF"},children:"}`"}),n(s.span,{style:{color:"#ADBAC7"},children:" },"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" { role: "}),n(s.span,{style:{color:"#96D0FF"},children:'"assistant"'}),n(s.span,{style:{color:"#ADBAC7"},children:", content: "}),n(s.span,{style:{color:"#96D0FF"},children:'"Understood. Continuing from there."'}),n(s.span,{style:{color:"#ADBAC7"},children:" },"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:" ..."}),n(s.span,{style:{color:"#ADBAC7"},children:"toKeep,"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" ];"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:"}"})})]})})}),"\n",n(s.p,{children:n(s.strong,{children:"Model selection cadence:"})}),"\n",n(s.p,{children:"Run the cost math for your specific workflow. If your main agent runs 8 turns\nper task and each turn is ~1,500 input tokens, switching from Sonnet to Haiku\nfor classification steps can save $0.15-0.30 per task — at 10,000 tasks per\nmonth, that is $1,500-3,000."}),"\n",n(s.p,{children:n(s.strong,{children:"Caching system prompts:"})}),"\n",n(s.p,{children:"For agents where the system prompt is long and static per session, use prompt\ncaching to avoid re-billing the same tokens on every turn."}),"\n",n(s.figure,{"data-rehype-pretty-code-figure":"",children:n(s.pre,{tabIndex:"0","data-language":"typescript","data-theme":"github-dark-dimmed",children:l(s.code,{"data-language":"typescript","data-theme":"github-dark-dimmed",style:{display:"grid"},children:[l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#F47067"},children:"const"}),n(s.span,{style:{color:"#6CB6FF"},children:" response"}),n(s.span,{style:{color:"#F47067"},children:" ="}),n(s.span,{style:{color:"#F47067"},children:" await"}),n(s.span,{style:{color:"#ADBAC7"},children:" client.messages."}),n(s.span,{style:{color:"#DCBDFB"},children:"create"}),n(s.span,{style:{color:"#ADBAC7"},children:"({"})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" model: "}),n(s.span,{style:{color:"#96D0FF"},children:'"claude-sonnet-4-5"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" max_tokens: "}),n(s.span,{style:{color:"#6CB6FF"},children:"4096"}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" system: ["})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" {"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" type: "}),n(s.span,{style:{color:"#96D0FF"},children:'"text"'}),n(s.span,{style:{color:"#ADBAC7"},children:","})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" text: longStaticSystemPrompt,"})}),"\n",l(s.span,{"data-line":"",children:[n(s.span,{style:{color:"#ADBAC7"},children:" cache_control: { type: "}),n(s.span,{style:{color:"#96D0FF"},children:'"ephemeral"'}),n(s.span,{style:{color:"#ADBAC7"},children:" }, "}),n(s.span,{style:{color:"#768390"},children:"// cache for 5 minutes"})]}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" },"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" ],"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:" messages,"})}),"\n",n(s.span,{"data-line":"",children:n(s.span,{style:{color:"#ADBAC7"},children:"});"})})]})})}),"\n",n(s.p,{children:"A 2,000-token system prompt cached across 10 turns saves ~18,000 input tokens\nper task. At Sonnet pricing, that adds up quickly in production."}),"\n",n(s.h2,{children:"Production Readiness Checklist"}),"\n",n(s.p,{children:"Before routing real users to your agent, work through this checklist:"}),"\n",n(s.p,{children:n(s.strong,{children:"Architecture:"})}),"\n",l(s.ul,{className:"contains-task-list",children:["\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Agentic loop has a ",n(s.code,{children:"maxIterations"})," guard"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Per-workflow token budget tracked and enforced"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","All tool schemas defined with Zod, not raw JSON"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Tool permissions categorized (read / write / dangerous)"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Dangerous tools route to HITL before execution"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","HITL queue has coverage (business hours at minimum)"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Fallback to human if Claude API is unavailable"]}),"\n"]}),"\n",n(s.p,{children:n(s.strong,{children:"Security:"})}),"\n",l(s.ul,{className:"contains-task-list",children:["\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Input guardrail runs before any message reaches the main agent"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Output guardrail runs before any message reaches the user"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","PII redacted from logs and tool call records"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Rate limiting per user or session"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","System prompt not exposed in tool descriptions or error messages"]}),"\n"]}),"\n",n(s.p,{children:n(s.strong,{children:"Testing:"})}),"\n",l(s.ul,{className:"contains-task-list",children:["\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Eval suite covers at least: happy path, tool failure, invalid input,\nescalation trigger, safety/adversarial"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Evals run on every deploy (CI integration)"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Baseline pass rate established before go-live (target: >95%)"]}),"\n"]}),"\n",n(s.p,{children:n(s.strong,{children:"Observability:"})}),"\n",l(s.ul,{className:"contains-task-list",children:["\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Structured logging at every pipeline stage boundary"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Session ID in every log event (enables conversation reconstruction)"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Tool call success/failure rate tracked"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Cost per workflow tracked (not just total cost)"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","HITL queue depth and response time monitored"]}),"\n"]}),"\n",n(s.p,{children:n(s.strong,{children:"Operations:"})}),"\n",l(s.ul,{className:"contains-task-list",children:["\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Rollback procedure documented (what happens if you need to disable the agent)"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","On-call rotation for HITL queue during business hours"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Alert on tool error rate spike"]}),"\n",l(s.li,{className:"task-list-item",children:[n(s.input,{type:"checkbox",disabled:!0})," ","Alert on per-workflow cost spike"]}),"\n"]}),"\n",n(s.hr,{}),"\n",l(s.p,{children:["Building all of this correctly from scratch takes weeks. The ",n(s.strong,{children:n(s.a,{href:"/kits/support-agent-workbench",children:"Support Agent Workbench"})})," ($129) is a production implementation of every pattern in this guide — triage, typed tools, guardrails, HITL console, 42-case eval suite — in TypeScript/Next.js, ready to wire into your stack. The ",n(s.strong,{children:n(s.a,{href:"/kits/agent-ready-saas-starter",children:"Agent-Ready SaaS Starter"})})," ($129) is the same production-grade agent layer wired into a complete Next.js SaaS skeleton, so your product starts agentic from day one instead of bolting it on later."]})]})}return{default:function(e={}){const{wrapper:l}=e.components||{};return l?n(l,{...e,children:n(_createMdxContent,{...e})}):_createMdxContent(e)}};