WEBVTT 00:00.400 --> 00:02.480 Okay, now to recap. 00:02.480 --> 00:03.400 What have we done? 00:03.560 --> 00:09.120 We first just used agents to write Python code so that agents could run. 00:09.160 --> 00:13.640 We sort of sneakily used the async gather so that we could run multiple in parallel. 00:13.800 --> 00:18.520 And then we used another agent afterwards to pick the best email. 00:18.640 --> 00:19.600 That was simple. 00:19.800 --> 00:26.280 We then use tools to wrap a function so that we could have an agent that calls a function, and we also 00:26.320 --> 00:32.040 used the as tool construct so that we could wrap other agents to be a tool. 00:32.040 --> 00:36.920 And we provided all of those tools to our sales manager agent. 00:36.920 --> 00:44.560 And we let it call three different email producers and then finally send the email at the end. 00:44.880 --> 00:49.640 So that's that's hopefully connecting for you, making a lot of sense. 00:49.640 --> 00:53.560 There is one more construct that is in some ways really similar. 00:53.560 --> 00:57.960 So it's a bit confusing, but there is a distinction and it's called a handoff. 00:58.520 --> 01:01.230 A hand-off is something that you can give an agent. 01:01.270 --> 01:04.150 An agent has a number of tools, and a number of handoffs. 01:04.270 --> 01:08.110 And handoffs are other agents that it can delegate to. 01:08.390 --> 01:12.950 So in many ways, that sounds really similar to taking an agent and wrapping it as a tool. 01:13.190 --> 01:16.270 An agent as a tool is very similar to a handoff. 01:16.430 --> 01:20.950 There's a kind of conceptual difference and and a very practical difference. 01:21.030 --> 01:27.750 The conceptual difference is that you can you can sort of think of it like there's an agent which either 01:27.750 --> 01:33.630 has just the ability to use tools as part of doing its job, or handoff is when it's delegating. 01:33.630 --> 01:39.670 It's sort of giving giving responsibility and ownership of a specialist task to another agent. 01:39.750 --> 01:42.470 So sort of philosophically, it's a bit of a different mindset. 01:42.510 --> 01:46.710 It's not just just using this as a little feature, a little tool to help with it's job. 01:46.710 --> 01:50.190 It's it's passing an entire job to another agent. 01:50.990 --> 01:54.990 But there's a more sort of fundamental, simple technical difference between them, which is that when 01:54.990 --> 01:58.570 you're using tools, you can think of that more as a request response. 01:58.570 --> 02:04.250 You're calling the tool and control passes back to you, and you continue as the main agent executing 02:04.250 --> 02:05.650 in the case of handoffs. 02:05.690 --> 02:11.010 You've done your piece, and you are now passing control to the other agent, and the flow does not 02:11.010 --> 02:12.610 come back to you again. 02:12.690 --> 02:15.090 It's just a passing of control. 02:15.130 --> 02:18.010 Delegation of control to a different agent. 02:18.250 --> 02:23.090 So that's the difference between agents as tools and handoffs. 02:23.330 --> 02:29.010 And it's, uh, you can you can use either in different situations, but but they are slightly different 02:29.010 --> 02:30.090 constructs. 02:30.290 --> 02:32.130 So I explain that a little bit here. 02:32.490 --> 02:37.850 And now we're going to make a new agent that eventually is going to be a handoff. 02:38.170 --> 02:39.650 So here's the deal. 02:40.250 --> 02:48.330 We are going to start by saying that, uh, you are I want a subject writer agent, something that is 02:48.330 --> 02:53.170 able to write, construct a subject for a given email body. 02:53.330 --> 02:56.480 Because if you noticed, but we didn't have subjects on those emails. 02:56.760 --> 02:59.720 So we're saying you can write subject for a cold email. 02:59.720 --> 03:00.840 When you're given a message. 03:01.000 --> 03:05.760 You need to write a subject for an email that's likely to get a response. 03:06.080 --> 03:07.960 So that's one instructions. 03:08.000 --> 03:16.520 Another instructions is going to be that you can convert a text email to an HTML email, a formatted 03:16.520 --> 03:21.760 email, which is how most emails get sent these days, particularly the fancy sales emails. 03:22.240 --> 03:24.360 So you will be given a text email. 03:24.360 --> 03:30.760 Body might have some markdown because llms often put markdown in these things, and you need to convert 03:30.760 --> 03:37.640 it to an HTML email with simple, clear, compelling layout and design. 03:38.040 --> 03:44.160 So we're then going to make an agent for the subject writer with those instructions. 03:44.520 --> 03:47.880 And we're going to use the as tool approach. 03:47.880 --> 03:50.560 This time we're going to make this a tool because it sounds like a tool right. 03:50.600 --> 03:52.400 It's just a tool to write a subject. 03:52.400 --> 03:53.640 So we're going to have a tool. 03:53.750 --> 03:56.670 and that tool is going to be wrapped around this agent. 03:57.150 --> 04:02.950 Similarly for the HTML converter, we're going to say, okay, so you're something which is able to 04:02.990 --> 04:04.550 write HTML emails. 04:04.550 --> 04:06.150 We're going to make you a tool. 04:06.150 --> 04:10.190 We're going to turn you into a tool, an HTML tool that's able to do that. 04:10.510 --> 04:10.950 All right. 04:10.990 --> 04:12.630 Let's oops what have I done. 04:13.150 --> 04:14.830 I'm in cursor land. 04:15.030 --> 04:15.630 Undo that. 04:15.630 --> 04:16.270 All right. 04:16.550 --> 04:17.350 Run that. 04:17.390 --> 04:18.030 Great. 04:18.470 --> 04:18.870 Okay. 04:18.910 --> 04:24.230 And then we're going to have one more tool which is rather similar to to the prior send email. 04:24.310 --> 04:27.270 But I've made this a send HTML email. 04:27.470 --> 04:30.070 And it takes a subject and a body. 04:30.270 --> 04:35.390 And it sends out an email with the given subject and body to all sales prospects. 04:35.550 --> 04:40.550 Again, remember to change this to your verified email sender. 04:40.710 --> 04:47.430 Make this some other email than mine please, and then send using SendGrid. 04:47.430 --> 04:53.370 And you can see there's just a tiny change here that it sends it as an HTML email, not a text email. 04:53.730 --> 04:54.050 Okay. 04:54.090 --> 05:00.650 So then we now have three tools subject HTML tool, and a subject tool that creates a subject, an HTML 05:00.690 --> 05:05.810 tool that converts a text email to HTML and the send tool. 05:05.970 --> 05:07.250 So two of these are agents. 05:07.250 --> 05:09.010 And one of them let's print them. 05:09.050 --> 05:10.050 Let's have a look. 05:10.330 --> 05:11.090 Tools. 05:12.410 --> 05:13.330 Two of them. 05:13.370 --> 05:14.810 They're all function tools. 05:14.930 --> 05:18.050 Two of them are actual agents wrapped. 05:18.050 --> 05:20.010 And one of them is just a function. 05:20.450 --> 05:21.650 Okay, we're almost there. 05:21.690 --> 05:22.490 Almost there. 05:22.930 --> 05:27.250 So now now we're going to create a separate agent. 05:27.250 --> 05:30.290 And this is going to be the agent that we're going to want to hand off to. 05:30.330 --> 05:32.850 If you're wondering what I'm where this is all heading. 05:33.210 --> 05:38.650 So this agent says you are an email formatter and sender. 05:38.850 --> 05:41.050 You receive the body of an email. 05:41.170 --> 05:45.890 You first use the subject writer tool, then the HTML converter tool. 05:45.890 --> 05:49.330 And finally you send the email. 05:49.600 --> 05:52.560 So we call this emailer agent. 05:52.560 --> 05:54.920 It has a name, it has instructions. 05:54.920 --> 05:56.120 It has tools. 05:56.120 --> 05:58.400 It has something new in here. 05:58.640 --> 06:00.440 Hand off description. 06:00.760 --> 06:03.400 Convert an email to HTML and send it. 06:03.400 --> 06:04.480 Now this. 06:04.640 --> 06:12.800 This is how this agent will sort of announce itself to the world in case another agent wants to use 06:12.800 --> 06:13.200 it. 06:13.240 --> 06:19.640 If there's another agent that might want to to do something, this is how it knows whether or not the 06:19.640 --> 06:22.680 emailer agent is an agent that might be useful. 06:22.960 --> 06:24.600 So that's a sort of framing. 06:24.600 --> 06:27.360 It's very similar to the to the tool description. 06:27.360 --> 06:30.040 It's a description of what this agent does. 06:31.160 --> 06:31.800 Okay. 06:32.080 --> 06:37.960 So if you've been following me you will now be clear that we have three tools. 06:37.960 --> 06:40.760 These are the three sales agents. 06:41.160 --> 06:43.400 And we have a hand off. 06:43.720 --> 06:48.000 We have this thing this this agent which we can hand over control to. 06:48.540 --> 06:56.860 and somewhat confusingly, this handoff itself has three tools subject writer, HTML converter, and 06:56.860 --> 06:58.300 a send HTML email. 06:58.700 --> 06:59.540 You following this? 06:59.580 --> 07:02.180 If not, come back, go through it or of course print. 07:02.180 --> 07:03.660 It's always good to print. 07:03.780 --> 07:11.060 We should print tools and we should print handoffs and take a look at what we've got. 07:11.060 --> 07:15.780 So this is the tools are just the sales email sales agent one, two and three. 07:16.260 --> 07:20.700 And the handoffs is a single agent called the email manager. 07:20.940 --> 07:25.140 And this agent we should see itself will have a bunch of tools. 07:25.860 --> 07:27.620 It has a handoff description. 07:27.860 --> 07:30.140 It doesn't have any handoffs itself. 07:30.620 --> 07:34.100 But somewhere in here we should find that it has a few tools. 07:34.100 --> 07:39.020 Here they are tools function tool named subject writer and so on. 07:39.420 --> 07:39.820 All right. 07:39.820 --> 07:45.900 If any of that's not clear, come back, look through this, print it, get a sense of it and then we 07:45.900 --> 07:47.140 will actually run this.