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<li class="toctree-l1"><a class="reference internal" href="prompt_guard.html">Prompt Guard</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">Agent Routing and Hand Off</a></li>
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<li class="toctree-l1"><a class="reference internal" href="function_calling.html">Function Calling</a></li>
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<li class="toctree-l1" x-data="{ expanded: $el.classList.contains('current') ? true : false }"><a :class="{ 'expanded' : expanded }" @click="expanded = !expanded" class="reference internal expandable" href="observability/observability.html">Observability<button @click.prevent.stop="expanded = !expanded" type="button"><span class="sr-only"></span><svg fill="currentColor" height="18px" stroke="none" viewbox="0 0 24 24" width="18px" xmlns="http://www.w3.org/2000/svg"><path d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"></path></svg></button></a><ul x-show="expanded">
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<p class="caption" role="heading"><span class="caption-text">Build with Arch</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../build_with_arch/agent.html">Agentic Apps</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../build_with_arch/multi_turn.html">Multi-Turn</a></li>
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<div class="mr-1">/</div><span aria-current="page" class="font-medium text-foreground overflow-hidden text-ellipsis whitespace-nowrap">Agent Routing and Hand Off</span>
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<span id="agent-routing"></span><h1>Agent Routing and Hand Off<a @click.prevent="window.navigator.clipboard.writeText($el.href); $el.setAttribute('data-tooltip', 'Copied!'); setTimeout(() => $el.setAttribute('data-tooltip', 'Copy link to this element'), 2000)" aria-label="Copy link to this element" class="headerlink" data-tooltip="Copy link to this element" href="#agent-routing-and-hand-off"><svg height="1em" viewbox="0 0 24 24" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z"></path></svg></a></h1>
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<p>Agent Routing and Hand Off is a key feature in Arch that enables intelligent routing of user prompts to specialized AI agents or human agents based on the nature and complexity of the user’s request.</p>
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||
<p>This capability significantly enhances the efficiency and personalization of interactions, ensuring each prompt receives the most appropriate and effective handling. The following section describes
|
||
the workflow, configuration, and implementation of Agent routing and hand off in Arch.</p>
|
||
<ol class="arabic simple">
|
||
<li><p><strong>Agent Selection</strong>
|
||
When a user submits a prompt, Arch analyzes the input to determine the intent and complexity. Based on the analysis, Arch selects the most suitable agent configured within your application to handle the specific category of the user’s request—such as sales inquiries, technical issues, or complex scenarios requiring human attention.</p></li>
|
||
<li><p><strong>Prompt Routing</strong>
|
||
After selecting the appropriate agent, Arch routes the user’s prompt to the designated agent’s endpoint and waits for the agent to respond back with the processed output or further instructions.</p></li>
|
||
<li><p><strong>Hand Off</strong>
|
||
Based on follow-up queries from the user, Arch repeats the process of analysis, agent selection, and routing to ensure a seamless hand off between AI agents as needed.</p></li>
|
||
</ol>
|
||
<div class="literal-block-wrapper docutils container" id="id1">
|
||
<div class="code-block-caption"><span class="caption-text">Agent Routing and Hand Off Configuration Example</span><a @click.prevent="window.navigator.clipboard.writeText($el.href); $el.setAttribute('data-tooltip', 'Copied!'); setTimeout(() => $el.setAttribute('data-tooltip', 'Copy link to this element'), 2000)" aria-label="Copy link to this element" class="headerlink" data-tooltip="Copy link to this element" href="#id1"><svg height="1em" viewbox="0 0 24 24" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z"></path></svg></a></div>
|
||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><code><span id="line-1"><span class="nt">prompt_targets</span><span class="p">:</span>
|
||
</span><span id="line-2"><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">sales_agent</span>
|
||
</span><span id="line-3"><span class="w"> </span><span class="nt">description</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">Handles queries related to sales and purchases</span>
|
||
</span><span id="line-4">
|
||
</span><span id="line-5"><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">issues_and_repairs</span>
|
||
</span><span id="line-6"><span class="w"> </span><span class="nt">description</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">handles issues, repairs, or refunds</span>
|
||
</span><span id="line-7">
|
||
</span><span id="line-8"><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">escalate_to_human</span>
|
||
</span><span id="line-9"><span class="w"> </span><span class="nt">description</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">escalates to human agent</span>
|
||
</span></code></pre></div>
|
||
</div>
|
||
</div>
|
||
<div class="literal-block-wrapper docutils container" id="id2">
|
||
<div class="code-block-caption"><span class="caption-text">Agent Routing and Hand Off Implementation Example via FastAPI</span><a @click.prevent="window.navigator.clipboard.writeText($el.href); $el.setAttribute('data-tooltip', 'Copied!'); setTimeout(() => $el.setAttribute('data-tooltip', 'Copy link to this element'), 2000)" aria-label="Copy link to this element" class="headerlink" data-tooltip="Copy link to this element" href="#id2"><svg height="1em" viewbox="0 0 24 24" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z"></path></svg></a></div>
|
||
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><code><span id="line-1"><span class="k">class</span><span class="w"> </span><span class="nc">Agent</span><span class="p">:</span>
|
||
</span><span id="line-2"> <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">role</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">instructions</span><span class="p">:</span> <span class="nb">str</span><span class="p">):</span>
|
||
</span><span id="line-3"> <span class="bp">self</span><span class="o">.</span><span class="n">system_prompt</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"You are a </span><span class="si">{</span><span class="n">role</span><span class="si">}</span><span class="s2">.</span><span class="se">\n</span><span class="si">{</span><span class="n">instructions</span><span class="si">}</span><span class="s2">"</span>
|
||
</span><span id="line-4">
|
||
</span><span id="line-5"> <span class="k">def</span><span class="w"> </span><span class="nf">handle</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">:</span> <span class="n">ChatCompletionsRequest</span><span class="p">):</span>
|
||
</span><span id="line-6"> <span class="n">messages</span> <span class="o">=</span> <span class="p">[{</span><span class="s2">"role"</span><span class="p">:</span> <span class="s2">"system"</span><span class="p">,</span> <span class="s2">"content"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_system_prompt</span><span class="p">()}]</span> <span class="o">+</span> <span class="p">[</span>
|
||
</span><span id="line-7"> <span class="n">message</span><span class="o">.</span><span class="n">model_dump</span><span class="p">()</span> <span class="k">for</span> <span class="n">message</span> <span class="ow">in</span> <span class="n">req</span><span class="o">.</span><span class="n">messages</span>
|
||
</span><span id="line-8"> <span class="p">]</span>
|
||
</span><span id="line-9"> <span class="k">return</span> <span class="n">call_openai</span><span class="p">(</span><span class="n">messages</span><span class="p">,</span> <span class="n">req</span><span class="o">.</span><span class="n">stream</span><span class="p">)</span> <span class="c1">#call_openai is a placeholder for the actual API call</span>
|
||
</span><span id="line-10">
|
||
</span><span id="line-11"> <span class="k">def</span><span class="w"> </span><span class="nf">get_system_prompt</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
|
||
</span><span id="line-12"> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">system_prompt</span>
|
||
</span><span id="line-13">
|
||
</span><span id="line-14"><span class="c1"># Define your agents</span>
|
||
</span><span id="line-15"><span class="n">AGENTS</span> <span class="o">=</span> <span class="p">{</span>
|
||
</span><span id="line-16"> <span class="s2">"sales_agent"</span><span class="p">:</span> <span class="n">Agent</span><span class="p">(</span>
|
||
</span><span id="line-17"> <span class="n">role</span><span class="o">=</span><span class="s2">"sales agent"</span><span class="p">,</span>
|
||
</span><span id="line-18"> <span class="n">instructions</span><span class="o">=</span><span class="p">(</span>
|
||
</span><span id="line-19"> <span class="s2">"Always answer in a sentence or less.</span><span class="se">\n</span><span class="s2">"</span>
|
||
</span><span id="line-20"> <span class="s2">"Follow the following routine with the user:</span><span class="se">\n</span><span class="s2">"</span>
|
||
</span><span id="line-21"> <span class="s2">"1. Engage</span><span class="se">\n</span><span class="s2">"</span>
|
||
</span><span id="line-22"> <span class="s2">"2. Quote ridiculous price</span><span class="se">\n</span><span class="s2">"</span>
|
||
</span><span id="line-23"> <span class="s2">"3. Reveal caveat if user agrees."</span>
|
||
</span><span id="line-24"> <span class="p">),</span>
|
||
</span><span id="line-25"> <span class="p">),</span>
|
||
</span><span id="line-26"> <span class="s2">"issues_and_repairs"</span><span class="p">:</span> <span class="n">Agent</span><span class="p">(</span>
|
||
</span><span id="line-27"> <span class="n">role</span><span class="o">=</span><span class="s2">"issues and repairs agent"</span><span class="p">,</span>
|
||
</span><span id="line-28"> <span class="n">instructions</span><span class="o">=</span><span class="s2">"Propose a solution, offer refund if necessary."</span><span class="p">,</span>
|
||
</span><span id="line-29"> <span class="p">),</span>
|
||
</span><span id="line-30"> <span class="s2">"escalate_to_human"</span><span class="p">:</span> <span class="n">Agent</span><span class="p">(</span>
|
||
</span><span id="line-31"> <span class="n">role</span><span class="o">=</span><span class="s2">"human escalation agent"</span><span class="p">,</span> <span class="n">instructions</span><span class="o">=</span><span class="s2">"Escalate issues to a human."</span>
|
||
</span><span id="line-32"> <span class="p">),</span>
|
||
</span><span id="line-33"> <span class="s2">"unknown_agent"</span><span class="p">:</span> <span class="n">Agent</span><span class="p">(</span>
|
||
</span><span id="line-34"> <span class="n">role</span><span class="o">=</span><span class="s2">"general assistant"</span><span class="p">,</span> <span class="n">instructions</span><span class="o">=</span><span class="s2">"Assist the user in general queries."</span>
|
||
</span><span id="line-35"> <span class="p">),</span>
|
||
</span><span id="line-36"><span class="p">}</span>
|
||
</span><span id="line-37">
|
||
</span><span id="line-38"><span class="c1">#handle the request from arch gateway</span>
|
||
</span><span id="line-39"><span class="nd">@app</span><span class="o">.</span><span class="n">post</span><span class="p">(</span><span class="s2">"/v1/chat/completions"</span><span class="p">)</span>
|
||
</span><span id="line-40"><span class="k">def</span><span class="w"> </span><span class="nf">completion_api</span><span class="p">(</span><span class="n">req</span><span class="p">:</span> <span class="n">ChatCompletionsRequest</span><span class="p">,</span> <span class="n">request</span><span class="p">:</span> <span class="n">Request</span><span class="p">):</span>
|
||
</span><span id="line-41">
|
||
</span><span id="line-42"> <span class="n">agent_name</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">metadata</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"agent-name"</span><span class="p">,</span> <span class="s2">"unknown_agent"</span><span class="p">)</span>
|
||
</span><span id="line-43"> <span class="n">agent</span> <span class="o">=</span> <span class="n">AGENTS</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">agent_name</span><span class="p">)</span>
|
||
</span><span id="line-44"> <span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Routing to agent: </span><span class="si">{</span><span class="n">agent_name</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
|
||
</span><span id="line-45">
|
||
</span><span id="line-46"> <span class="k">return</span> <span class="n">agent</span><span class="o">.</span><span class="n">handle</span><span class="p">(</span><span class="n">req</span><span class="p">)</span>
|
||
</span></code></pre></div>
|
||
</div>
|
||
</div>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>The above example demonstrates a simple implementation of Agent Routing and Hand Off using FastAPI. For the full implementation of this example
|
||
please see our <a class="reference external" href="https://github.com/katanemo/archgw/tree/main/demos/use_cases/orchestrating_agents" rel="nofollow noopener">GitHub demo<svg fill="currentColor" height="1em" stroke="none" viewbox="0 96 960 960" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M188 868q-11-11-11-28t11-28l436-436H400q-17 0-28.5-11.5T360 336q0-17 11.5-28.5T400 296h320q17 0 28.5 11.5T760 336v320q0 17-11.5 28.5T720 696q-17 0-28.5-11.5T680 656V432L244 868q-11 11-28 11t-28-11Z"></path></svg></a>.</p>
|
||
</div>
|
||
<section id="example-use-cases">
|
||
<h2>Example Use Cases<a @click.prevent="window.navigator.clipboard.writeText($el.href); $el.setAttribute('data-tooltip', 'Copied!'); setTimeout(() => $el.setAttribute('data-tooltip', 'Copy link to this element'), 2000)" aria-label="Copy link to this element" class="headerlink" data-tooltip="Copy link to this element" href="#example-use-cases" x-intersect.margin.0%.0%.-70%.0%="activeSection = '#example-use-cases'"><svg height="1em" viewbox="0 0 24 24" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z"></path></svg></a></h2>
|
||
<p>Agent Routing and Hand Off is particularly beneficial in scenarios such as:</p>
|
||
<ul class="simple">
|
||
<li><p><strong>Customer Support</strong>: Routing common customer queries to automated support agents, while escalating complex or sensitive issues to human support staff.</p></li>
|
||
<li><p><strong>Sales and Marketing</strong>: Automatically directing potential leads and sales inquiries to specialized sales agents for timely and targeted follow-ups.</p></li>
|
||
<li><p><strong>Technical Assistance</strong>: Managing user-reported issues, repairs, or refunds by assigning them to the correct technical or support agent efficiently.</p></li>
|
||
</ul>
|
||
</section>
|
||
<section id="best-practices-and-tips">
|
||
<h2>Best Practices and Tips<a @click.prevent="window.navigator.clipboard.writeText($el.href); $el.setAttribute('data-tooltip', 'Copied!'); setTimeout(() => $el.setAttribute('data-tooltip', 'Copy link to this element'), 2000)" aria-label="Copy link to this element" class="headerlink" data-tooltip="Copy link to this element" href="#best-practices-and-tips" x-intersect.margin.0%.0%.-70%.0%="activeSection = '#best-practices-and-tips'"><svg height="1em" viewbox="0 0 24 24" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z"></path></svg></a></h2>
|
||
<p>When implementing Agent Routing and Hand Off in your applications, consider these best practices:</p>
|
||
<ul class="simple">
|
||
<li><p>Clearly define agent responsibilities: Ensure each agent or human endpoint has a clear, specific description of the prompts they handle, reducing mis-routing.</p></li>
|
||
<li><p>Monitor and optimize routes: Regularly review how prompts are routed to adjust and optimize agent definitions and configurations.</p></li>
|
||
</ul>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>To observe traffic to and from agents, please read more about <a class="reference internal" href="observability/observability.html#observability"><span class="std std-ref">observability</span></a> in Arch.</p>
|
||
</div>
|
||
<p>By carefully configuring and managing your Agent routing and hand off, you can significantly improve your application’s responsiveness, performance, and overall user satisfaction.</p>
|
||
</section>
|
||
</section>
|
||
</div><div class="flex justify-between items-center pt-6 mt-12 border-t border-border gap-4">
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||
<polyline points="15 18 9 12 15 6"></polyline>
|
||
</svg>
|
||
Prompt Guard
|
||
</a>
|
||
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<div class="ml-auto">
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Function Calling
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<ul>
|
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<li><a :data-current="activeSection === '#example-use-cases'" class="reference internal" href="#example-use-cases">Example Use Cases</a></li>
|
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<li><a :data-current="activeSection === '#best-practices-and-tips'" class="reference internal" href="#best-practices-and-tips">Best Practices and Tips</a></li>
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