Registry Review MCP Server

# Multi-Agent Orchestration: The Orchestrator Agent ## The Constraint of the Generative AI Age In the generative AI age, the rate at which you can create and command your agents becomes the constraint of your engineering output. When your agents are slow, you're slow. When your agents have a problem, you have a problem. If you're using agents at scale, you know exactly what this means. Right now, every engineer sits at one of these levels: base agents, better agents, more agents, and custom agents. The theme here is simple—at each step, you scale your compute to scale your impact. It's not about what you can do anymore. It's about what you can teach your agents to do for you. ## The Giant Leap Forward There's one more level, one giant leap forward to share in this lesson. Engineers like you and I, using agents every single day, are all thinking about the same thing. And the votes for Agentic Horizon show it. In order to scale your agents, you need to manage your fleets of agents. Multi-agent orchestration is the next step in our journey as agentic engineers. Let me introduce you to one powerful multi-agent orchestration solution: the one agent to rule them all, the orchestrator agent. ## The Single Interface Pattern This is the single interface pattern applied to your fleet of agents. It's an existing engineering paradigm that great engineers have used for decades. We're applying the single interface pattern to agents. But it's not just the orchestrator agent that matters. We're combining three pillars: **The Orchestrator Agent:** Your unified interface to your agents. Your orchestrator agent unlocks CRUD for your agents, giving you agents at scale. **Observability:** Real-time monitoring of your agents' performance, costs, and results. When you combine these three pillars, you get a powerful solution to multi-agent orchestration. ## A Different Kind of Application Where is our input field? This is not a normal application for normal users. This is for you and I, the agentic engineer. We're maximizing information density without losing UX quality. If we hit Command+K here, we'll see our prompt input interface. It has useful metadata about the capabilities of this codebase we'll cover in a moment. We'll start with a simple ping prompt. Our orchestrator agent is going to give us a quick response. Now, let's spin up some agents here. We're going to create three individual agents. We're going to have them summarize the codebase, build an application structure summary inside of a markdown file with Mermaid tables. We're going to fire this off and truly show off the potential and the capability of an orchestrator agent. ## Orchestrating Agent Creation Now, our orchestrator agent is going to craft three new agents and then prompt them. So we're going to have a total of six unique tool calls built around managing and orchestrating agents. As you can see here, here's our first agent, here's our second agent, and our orchestrator agent is going to spin up our third agent—right now, our QA agent that's going to do both the front-end and the backend summarization work. You can see right away, this is a differentiated agentic coding experience. ## The Power of Observability With multi-agent observability, you can see everything. Observability is a key component of a successful multi-agent system. Why is that? It's because if you can't measure it, you can't improve it. And if you can't measure it, you can't scale it. If you have ten agents doing the wrong thing, does it matter that you have ten? Of course not. This is why observability is key. And it's also why the orchestrator is an advanced agent coding concept. It comes last, after custom agents. You can see here we have an interface that is communicating the work of every one of our agents. We have responses, we have tools, we have thinking. We can of course filter on any one of these. We can filter on responses, individual tool calls, we can filter on our individual agents. So here's just our QA agent. The observability here is essential for scaling impact. ## Scaling Compute With a single prompt, I've deployed three times the compute an engineer working in the terminal has. And this is just the beginning. We have two fast agents. We've divided this work into front-end, backend, and then we have a primary, powerful agent that's going to do the key work of summarizing both the front-end and backend. And our orchestrator took care of actually commanding and creating our agents. If we scroll back up, you can see all six of those tool calls: create agent, create agent, create agent, and then three command calls. Already we have this very interesting pattern of our orchestrator agent taking our high-level prompt and then writing out in much more detail the actual concrete work that we want done to our agents. ## Why Not Just Sub-Agents? Already this is a differentiated experience. I know right away some engineers are going to think, "Aren't these just sub-agents? Why aren't you just using sub-agents?" Having a primary agent here connected to your orchestrator agent is differentiated. You're going to see this over and over. We can do a lot more when we control our agentic units with our orchestrator agent. And you'll notice throughout all of this, our orchestrator agent has stopped doing work, right? Its orchestration tasks for the meantime are completed. It has created and commanded our agents. Now, our agents are doing the work. ## Managing the Core Four If we dial into the individual agent user interface here, you can see a couple of key things. We have the name, we have the status, we have the context windows. We're managing the core four of every single agent we spin up. If you do not adopt your agent's perspective, if you do not know what they can do, you do not know what you can do. We have our response messages, we have tool calls, we have hooks, and of course, we have reasoning. You can see here, none of our agents are thinking. They're not reasoning at all. That's okay. For these tasks, we have our models and our costs. ## Communicating Work Now something incredible just happened. As you can see here, our primary QA agent has finished its work. We have its consumed assets and its produced assets. Engineering is all about communicating work, so your multi-agent system should reflect that. It should showcase that. Right here in a single response message, you can see the actual read files and the produced files from our QA agent at a glance. We can do something really powerful. We can see the diff right here inline, but more importantly, we can one-click into our editor. So now we're operating inside the loop. We're looking at this file. We're actually reviewing and understanding what's been done in markdown mode. Here we can see exactly what our agent has broken down for us. ## Compounding Engineering This is a great opportunity to actually talk about the codebase architecture. You should be compounding your engineering with each leverage point of agent coding that you add to your codebase. Then you build a system where you find one that lets you solve problems as you continue to move from in-loop to out-of-loop. There are so many problems that you do not need to be sitting in the terminal prompting back and forth to solve. Keep in mind, a specialized tool like this is going to be more powerful than some out-of-the-box cloud-based tool. Why is that? It's because these tools are designed for everyone's codebase, not yours. When you build something like this, you get specialization all the way down. It's super important to note I have this deployed for several codebases. I can access anywhere, anytime through multiple devices, and it's all because it's designed as an out-of-loop system. ## Concrete Results You can see our front-end and backend agents have also completed their work. We can see all the files they've consumed. We can see the actual concrete produced results. You're not getting this with out-of-the-box agent coding tools. You're not getting this with any cloud tool. This is a specialized solution for managing agents at scale. This is multi-agent orchestration. So we can dive into any one of these results. You can see here our backend QA agent went pretty hard here on the backend docs. This is all fantastic. We can of course dive into any of this if we want to with a single click, and we'll be taken right into the piece of documentation that we can then tweak, delete, or modify. ## Managing Agents at Scale Another massive advantage of our orchestration system is this: it's designed to help us manage our agents at scale. We can list agents and then check the status of our agents. This is going to kick off our orchestrator agent once again and have it actually understand the work that was done. Now, this is super important. Our orchestrator agent is not always looking at the results. Look at what just happened there between all these agents. It's incredibly overwhelming. There's too much information. What we've done here with our orchestrator agent is we've designed it to be—this is super important, we're going to touch on this in a moment—we've designed it so it is not always observing the logs. It cannot be. We have to protect its context window. ## Protecting Context Windows This is true for your orchestrator agent. This is true for your primary agents. You always need to be monitoring and understanding the core four of every agent you boot up. Remember, on top of every feature any lab builds, any UI that you see, any experience, it's all just the core four. Don't let anyone confuse you—context, model, prompt, tools. Do you know what these four leverage points are at every critical moment? This is key. As you can see here, through our interface, we have a really great idea of the state of the core four for all of our agents. You can see the orchestrator agent ran some specialized tools to actually check the status of every agent, and then it's communicating to us. This single interface pattern is very important here for orchestrating agents at scale. We're protecting context windows. We have specialized, dedicated, focused agents, right? Focused on one specific task. This is important. We're going to touch on that in a moment. And then our orchestrator agent is communicating to us. ## Continuing the Work We can continue our work. This is the powerful part of having a system like this. We can build anything we need to get the job done. You can see here we have a bunch of metadata. We'll cover that in just a moment. Let's just run this. I'll say, "Command all agents: create one section, a single sentence of each key node in the system. Quick, concise, enable thinking." So let's get thinking mode turned on here, and we'll go ahead and fire that off. Once again here, the pattern is the same. Prompt one, prompt two, prompt three. We have the brain icon here. And now they're starting to actually think through what's going on here. This should be just a quick summary. They're going to make a quick change to the top of their file. These aren't just one-off sub-agents where the context is blown away or we have to manage where the sub-agent was. These are primary agents that we can tap into over and over until that specific job is done. ## Persistent Agent Context Something that's going to happen here that's going to be really important—here are results. Once again, we can just dial into these. We can see all the consumed files versus produced files. It's important that our orchestrator agent can tap into each agent when it needs to command them, read from them. But again, we don't want our orchestrator agent getting involved in the actual work. It is just here to orchestrate. Let's look at our front-end summary. If we just click into this, we should see front-end key nodes. Check this out. We have our key components, we have our composables, we have our services, and we have our core files. This is great. We got a key summary here. You can see all the key technologies we used. We are constantly moving from in-loop to out-of-loop. And the multi-agent orchestration with the orchestrator agent helps us reduce our presence. It helps us understand what our agents are doing. And it helps us scale our agents. ## The Journey of Deletion Now that the job is done, whatever work you needed your agent to complete, it's finished. There's a journey that every engineer goes through. First, you learn how to read code, then you create code, then you update code, and then in the end, you learn that the best code is no code at all. You learn to delete. Command+K, delete all agents. Agentic engineering is no different. You must treat your agents as deletable temporary resources that serve a single purpose. You can see three tool calls came in there. Our orchestrator agent has blown away our agents. The work is done. The job is done. Let the agents go home. ## The R and D Framework In Tactical Agent Coding Lesson Six, we dial into this concept with one key tactic. This is something that 80% plus of all engineers are rediscovering over and over every time they explode their context window. Multi-agent orchestration with our orchestrator agent lets us do just that. What are we doing here? We're tapping into the R and D framework. We discussed this inside of the Elite Context Engineering Agentic Horizon lesson. By the way, if you haven't completed Tactical Agent Coding and the previous Agentic Horizon lessons, stop this video, go watch those. All of this will make a lot more sense. We are compounding our engineering with tactics of agentic coding and powerful patterns over and over. Every single lesson matters. Every single lesson was designed to have a critical idea, a critical tactic to push what you can do further. ## Context Windows Are Plenty Let me be clear. I'm super excited for larger effective context windows, but a 200K context window is plenty. You're just stuffing a single agent with too much work, just like your boss did to you at your last job. Don't force your agent to context switch. You know what that feels like. Force it to focus and then let it go home back to the data center. Delete it. ## How Does This Actually Work? Let's take a step back and talk high level. How does this actually work? Let me be super clear about something. The orchestrator agent is a pattern. Even in single agents, a lot of engineers are barely using their agent's potential. I'm going to use our orchestrator: "Scout and build, create simple flat colorless gray pills for the app header information." Tense keyword there. This is a location in the codebase—active running logs. The running cost displays. We're just going to create some simple UI pills. This is a simple one-off task. I just want to showcase this prompt to you. We're spinning up a small team of agents to accomplish a task. Each context window, each task of our agent is going to be focused. You can see here this prompt has triggered orchestrator thinking. Our orchestrator is now thinking and now it's running a workflow. There we go. We have our scout header and we're going to create two agents here: scout and our builder. ## Agent Handoffs There's our builder, there's our scout, and our scout is going to get to work here after our orchestrator kicks it off. We can spin them up and spin them down with a single prompt. This is another powerful example of multi-agent orchestration. We have agents doing work, creating useful information sets, and they're going to pass that off to the next agent. We're talking plans, we're talking logs, we're talking results, we're talking documentation, and then our orchestrator chains it all together. Look at what our orchestrator is doing here. It is actually involved in this process. Our orchestrator is in a loop, sleeping. You've probably seen this pattern. Your primary agent will sleep, fire off some other agents to do some work, and then it'll check in on that. This is a common agent coding pattern you can use. We're scaling up the compute to monitor this multi-agent workflow. Every fifteen seconds it's going to run "check agent status" on the scout to see how the scout is doing. You can see there, scout has just finished its work. We're now going to get our produced assets. Every agent must produce a concrete result. Otherwise, what's the point? We can of course dial in. We can see the summary there. And it knows exactly where to put these exact files. Keep in mind how much work this orchestrator has conducted up to this point, and its context is still floating along because we are protecting all of the context. ## Prompt Engineering at Scale Now our orchestrator has handed the work off to our builder agent. Very powerful stuff there. There's another command agent tool, and you can see, check out this write-up. Check out this detailed write-up our orchestrator gave to our builder. It is doing some serious prompt engineering. You can see the work coming in there. Keep in mind these agents are operating on this project. They're operating on themselves. Builder is being very precise because we had a scout look for the changes to make. Obviously, this is a relatively simple UI change, but we're putting a team of agents to make sure the job gets done. If you can deploy a little bit more compute to have more confidence and more trust in your agents, why wouldn't you? Compute can solve so many of your engineering problems if you put the compute to work. Here we are, builder doing some thinking. We can just dial in on all the thinking of our agent here if we want to. And of course, we can just specialize on just our builder agent logs here. If you just want to see the individual tools, we can see that as well. But what we really care about most of all is the results. ## Verification and Validation Our orchestrator is thinking one more time, still executing, doing verification work. Looks great. Changes are in place. It's going to check the syntax for us. All this is happening for us with our multi-agent orchestration system, all driven by our orchestration agent. We have put together three critical pieces to unlock the next scale of agentic engineering. We have an orchestrator, we have CRUD for agents so we can unlock agents at scale, and we have observability. These three design elements unlock something special here. ## More Complex Examples We're going to do something a little more complex, some more UI changes. We want our agent list to collapse, and we want to update our orchestrator chat to go into small mode when browser width is less than 650. We'll just be super clear here and say "less than." We're going to kick this off, and this is of course going to fire off an agentic prompt designed for our orchestrator. This is something that a lot of engineers don't realize. Once you build a custom agent, the real trade-off here, the real balance is that this takes time to build. Very obviously, multi-agent orchestration and the orchestrator agent cost upfront investment, and you have to manage your orchestration agent. You have to manage the plumbing, the database, websocket connections, and it can be a lot to coordinate. ## Is This Worth It? Is this worth investing into? I think the answer is a very clear yes. You want to have—even if you don't use this—the key here is that you want to have some type of out-of-loop agentic coding system. You want to have multiple modes of engineering. If you need to step down into the loop, which I had to do when building this out, I've had to do it multiple times, you can. Hop in the loop, hop in the terminal, increase your presence, write those back and forth prompts. That's fine. I fully recognize that is a valid mode of engineering. But more and more there is work you should not be doing. You're wasting your time. The right way to think about engineering now is the agentic way. You want to be thinking about scaling your agentics. ## Human-in-the-Loop Decision Points Remember Tactic Eight: human-in-the-loop decision points are going to be very critical. You can see a simple interface on top of this where your agent wants to ask you a question. Your agent wants to prompt you. This is a key point in agentic engineering where your agents start asking you questions versus the other way around. Something else that's missing—if we want to fork an agent's context window and basically duplicate an agent from a specific point, this is one tool away. And thanks to the Claude Agent SDK, it's a few modules away from being built out. Looks like our builder has finished its work. This is fantastic. You can see again all the work done. One click away. Result-oriented engineering in a single interface. Our out-of-loop system is very, very powerful here. ## Beyond Pull Requests A lot of systems rely on pull requests. That's great, but it misses a lot of the story. It misses a lot of the journey. We get all of it here with our observability interface. So our agent's finished. Let's see how it's done here. This feature shipped. We're now having our reviewer agent confirm that the work was done. Big labs are going to be doing something like this. You already see it with Claude coding tools. These are coming. And there's going to be many varieties of this. There's going to be your vibe coding one-shot prompt tools, and then there's going to be your legitimate engineering tools. Obviously, we're going to lean super hard on the legitimate software engineering out-of-the-loop agentic coding tools like this system, but these are coming up. We want to have a spectrum of tools we can use. ## Domain-Specific Specialization More specifically, we want to have a dedicated solution for solving our domain-specific problems with our specialized agents. This is the agentic engineering advantage. You can build agents that know your problem better than anyone—better than any cloud tool, better than any team. This is the advantage. And you can scale it hard now with the multi-agent orchestration and the orchestration agent. ## The Perfect Combination The orchestrator agent is the first pattern where I felt the perfect combination of observability, customizability, and agents at scale. In this lesson, we spun up many, many agents with dedicated focus context effortlessly. We can of course clean up our agents with a single command. We can control it all and manage our compute better, faster than ever before. Any release or system that enables you to increase the information rate between your agents and your work requires your attention, requires your focus. The orchestrator agent is one of those systems. I'll see you in the next Agentic Horizon lesson.