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Tracks›Build AI Agents
L2Lesson 2Free

Your agent, one job end to end (the win)

After this, you'll have run your agent on a real multi-step job from raw input to finished output, evaluated the result against your own quality bar, and seen the concrete gap that premium features (memory, connected tools, agent teams) close.

Before you start

Complete Give your agent tools first. You need the tools concept to understand what your agent can and cannot reach.

The idea

This is the lesson where your agent does a real job and you hold the result in your hands. Not a demo. Not a hypothetical.

A loose agent loop stops after a draft and never checks whether the artifact helped.
A loose agent loop stops after a draft and never checks whether the artifact helped.
Bring the real, messy pile. The finished artifact on the other side is the proof it worked.
A single continuous line tangles into a messy pile on the left with a faint dotted path leading to a golden dot at the far right: a real batch of work at the start of the path to a finished result.

You will feed your agent a real batch of input, watch it work through the perceive-decide-act loop with real stakes, and walk away with output you would actually send, file, or act on.

The previous lessons built the foundation: you know what an agent is (Lesson 1), you built one with a specific job and persistent instructions (Lesson 2), and you understand how tools extend what it can reach (Lesson 3).

Now you put it all together: one job, start to finish. Real input, real output, real evaluation.

To End FlowMove through To End Flow, check proof, then fix only the weak part.
yesnorun it again
StartBegin with the real task
To End FlowShow someone the artifact your agent produced and ask if they would use it. If they
1Proof visible?You named at least two real limits you hit during the full run
Ready to useShow someone the artifact your agent produced and ask if they would use it. If they
Fix the weak partBreaks when you intervene during the run instead of letting the agent finish. If you

Here is what "end to end" means concretely:

Start: you bring a real batch of input to your agent Project. Not a test batch, not three sample emails.

The actual pile of stuff that has been sitting on your desk or in your inbox. The messier, the better, because that is what the agent will face every week.

Middle: the agent runs the loop. It reads your input (perceive), applies the rules you wrote in the Project instructions (decide), and produces structured output (act).

You watch for two things: did it follow the instructions, and is the output something you would actually use? Not "is it impressive," but is it useful.

End: you have a finished artifact: a triage summary, a set of draft replies, a sorted task list, a report. Whatever job your agent does, the artifact is the proof it worked.

If you would send the draft, file the summary, or act on the list, the agent passed. If you would rewrite it from scratch, the instructions need tightening.

The quality bar is yours, not the agent's. The agent does not know if its output is good. You do.

This is the step most people skip: actually holding the output against your own standard and being honest about where it falls short. That gap is exactly the information you need to improve the instructions.

What you will notice is missing (and that is the point):

After you run the full job, you will hit real edges. The agent cannot remember what it did for you last week (it starts fresh every conversation).

It cannot pull information from your calendar or CRM without you pasting it in. It cannot hand part of the job to a second specialist agent.

Those three gaps are exactly what the premium modules in this track close: - Memory (Module 4) gives the agent recall across sessions, so it builds on what it learned last week instead of starting cold. - Connected tools via MCP (Module 5) lets it reach into your real services (email, calendar, project tracker) without you copy-pasting. - Agent teams (Module 8) let you split a complex job across specialists that hand work to each other, so a research agent feeds a writing agent that feeds a review agent.

Those are the next rungs. The free funnel you completed proves the pattern works. The premium modules remove the manual steps that keep you in the loop.

Try it (15 min)

Watch out for

  • Using test data instead of real input. The whole point is running the agent against the mess of your actual week. Clean test data produces clean results that mean nothing about real performance.
  • Rating everything as EDIT to avoid being harsh. If you would rewrite a section from scratch, that is a REDO, and that is the most useful signal. Honest ratings drive the best instruction improvements.
  • Skipping the second run after improving the instructions. The improvement loop is the core skill: run, rate, fix, re-run. Without the re-run you have no evidence the fix worked.
  • Feeling like the agent 'should' be more impressive. An agent that reliably triages your email every week is more valuable than a demo that writes a novel once. Consistency beats spectacle.

Paste this into Claude

This is the real run. No practice input. No test data.

STEP 1: GATHER REAL INPUT
Collect the actual batch of input your agent is designed to process. If your agent triages email, open your inbox, select the unread messages, copy them, and paste as plain text. If it summarizes reports, bring a real report. If it sorts tasks, bring your real task list. The messier and larger the batch, the more honest the test.

Privacy note: before pasting, strip names, account numbers, and anything sensitive you would not want in a chat log. Replace them with placeholders like [Client A] or [Account #].

STEP 2: RUN THE FULL JOB
Open your agent Project. Start a new conversation. Paste (or point to) the full batch. Let the agent run. Do not intervene, correct, or prompt it mid-run. Let it finish.

STEP 3: EVALUATE THE OUTPUT
After the agent finishes, ask Claude this inside the same conversation:

"I'm going to evaluate your output. For each section you produced, I'll rate it SEND (I would use this as-is), EDIT (needs minor changes), or REDO (I would start over). Walk me through each section so I can rate it."

Be honest. A SEND is something you would actually forward, file, or act on today. An EDIT needs a few fixes but the structure is right. A REDO means the agent missed the point.

STEP 4: EXTRACT THE IMPROVEMENT
After rating, ask Claude:

"Based on my ratings, what are the top 2 changes to the Project instructions that would turn the most EDITs into SENDs? Write the updated instruction lines I should replace."

Take those changes, update the Project instructions, and run one more batch. See if the SEND count improves.

Created by potrace 1.16, written by Peter Selinger 2001-2019 What a good response looks like

## Evaluation: Weekly Email Digest, June 16

### Urgent section
**Rating: SEND.** Correctly identified the proposal deadline change as the top item. Summary is accurate and concise.

### Needs Reply section
**Rating: EDIT.** Both draft replies are close but the tone on the vendor response is too formal for how I write to CloudHost. Need to add "match my casual tone for vendor emails" to instructions.

### FYI section
**Rating: SEND.** Clean, no unnecessary detail. Correct that no action is needed.

### Overall structure
**Rating: SEND.** Categories are right, formatting is consistent, total is under 300 words as instructed.

**Score: 3 SEND, 1 EDIT, 0 REDO.**

### Top 2 instruction changes:
1. Add: "For vendor and supplier emails, use a casual, direct tone. No 'Dear' or 'Regards.'"
2. Add: "If a Needs Reply email is low-stakes (scheduling, confirmations), keep the draft under 30 words."

Created by potrace 1.16, written by Peter Selinger 2001-2019 What good looks like

  • You ran the agent on a real, full-size batch of input from your actual week
  • You rated every section of the output honestly (SEND, EDIT, or REDO)
  • At least one section earned a SEND rating on the first run
  • You extracted instruction improvements and applied them to the Project
  • You ran a second batch with the improved instructions and saw at least one rating upgrade

Created by potrace 1.16, written by Peter Selinger 2001-2019 Go deeper (6 min)

Paste this into Claude

Now that you have a working agent with a real result, map the edges. Open a fresh conversation (outside your Project) and paste this:

"I built an agent that [describe your agent's job in one sentence]. It works well for [what it handled]. But I noticed these limits:

1. It does not remember what it did last week.
2. It cannot pull data from [name the services you wished it could reach].
3. When the job gets complex, I wish it could hand part of the work to a specialist.

For each limit, explain in one paragraph what would fix it and what that fix is called in agent terms (memory, MCP connectors, multi-agent teams). Keep it practical, not theoretical."

This exercise connects what you experienced to what the premium track teaches. You are not buying features in the abstract. You are buying fixes for edges you personally hit.

Created by potrace 1.16, written by Peter Selinger 2001-2019 What good looks like

  • You named at least two real limits you hit during the full run
  • Claude mapped each limit to a specific agent concept (memory, MCP, multi-agent)
  • You understand what each premium module would concretely fix in your workflow

When this breaks

  • Breaks when you intervene during the run instead of letting the agent finish. If you correct it mid-stream, you are doing the job, not the agent. Let it finish, then evaluate. The evaluation is where you learn.
  • Breaks when you blame the AI model instead of the instructions. Nine times out of ten, a bad result means the instructions were not specific enough. The model follows what you wrote. Tighten the instructions before switching models or tools.
  • Breaks when you expect premium-level results from the free setup. The agent cannot remember last week, cannot reach your apps, and cannot delegate. Those are real gaps, and they are what the premium modules fix. Recognizing the gap is the point of this lesson, not a failure.

AI can help with this

After your first full run, ask Claude: 'Review my agent output. Rate each section as SEND, EDIT, or REDO, then write the instruction changes that would fix the biggest weakness.' Claude gives you the evaluation and the fix in one shot. You apply it and re-run.

The loop completes input, tool use, artifact, feedback, and one improvement with the golden dot on the revised result.

Created by potrace 1.16, written by Peter Selinger 2001-2019 You can now

✓

You ran a full real-input job end to end and have a finished artifact

  • ✓You rated the output honestly and improved the instructions based on the ratings
  • ✓You can name the specific gaps (memory, tools, teams) that would make your agent better
  • ✓You have a working, repeatable agent you will actually use next week

Key takeaways

An agent that does one real job, reliably, every week, is worth more than a demo that does everything once. The free funnel proves the pattern. The premium track removes the manual steps.

  1. 1End to end means real input, real output, real evaluation. Test data is not a test. The mess of your actual week is the only honest benchmark.
  2. 2The SEND/EDIT/REDO rating system gives you specific, actionable feedback. Extract the instruction changes that turn EDITs into SENDs, apply them, and re-run.
  3. 3The three gaps you will hit (no memory across sessions, no direct access to your tools, no way to delegate to specialists) are exactly what premium modules close: memory (M4), MCP connectors (M5), and agent teams (M8).
  4. 4Consistency beats spectacle. An agent that reliably does one job every week is the foundation everything else builds on.

Created by potrace 1.16, written by Peter Selinger 2001-2019 Go deeper

  • See the full Build AI Agents track
  • Wire Your First MCP (core path, L7)
  • What an agent actually is (Google Antigravity track)
  • Anthropic: Building effective agents

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