---
title: "Slides: Katelyn Lesse – Evolving Claude APIs for Agents, Anthropic"
category: "slides"
video_id: "aqW68Is_Kj4"
sourceLabels: ["Public YouTube video frames", "Public YouTube metadata"]
---

# Slides: Katelyn Lesse – Evolving Claude APIs for Agents, Anthropic

## Source Video
[Katelyn Lesse – Evolving Claude APIs for Agents, Anthropic](https://www.youtube.com/watch?v=aqW68Is_Kj4)

## Relationship To World's Fair 2026
These slides are extracted from a public AI Engineer YouTube video connected to World's Fair 2026. Speaker-matched clips are supporting context unless later confirmed as exact session recordings; official livestream recordings are day-level/event-level source material.

## Related Scheduled Sessions
- No individual scheduled session mapping has been assigned yet; treat this as an event livestream deck.

## Extracted Slides
![[assets/slides/aqW68Is_Kj4/slide-001.jpg]]

OCR text:

> , a Po
> a)
> aren F
> Ca aa
> ae

![[assets/slides/aqW68Is_Kj4/slide-002.jpg]]

OCR text:

> ~'
> 7 a
> oo - - ” a
> . ay
> ‘4
> or
> ; 2
> . E
> |

![[assets/slides/aqW68Is_Kj4/slide-003.jpg]]

OCR text:

> @mmeee = How the Claude Developer Platform maximizes
> ; = intelligence
> : 2
> ie
> Harness Claude's Manage Claude's context Give Claude a computer &
> capabilities let it cook
> EVOLVING CLAUDE APIS FOR AGENTS
> OEP AEEE MIAME «= KATELYN LESSE / Engineering Leader ANTHROP\C

![[assets/slides/aqW68Is_Kj4/slide-004.jpg]]

OCR text:

> *
> EVOLVING CLAUDE APIS FOR AGENTS
> OEP EER MIRREN © KATELYN LESSE /énoineering Leader ANTHROP\C

![[assets/slides/aqW68Is_Kj4/slide-005.jpg]]

OCR text:

> Thinking Extended response=client.messages.create( model='claude-sonnet-4-5-2e258929" max_tokensm8192, thinking=( "enabled":True, "budget_tokens":
> messages=[{ "role":"user", "content":“Help me debug why this system fails under load"
> ANTHROPIC
> AIE/LEAD EVOLVINGCLAUDEAPISFORAGENTS
> GoogleDeepMind PRESENTED BY KATELYN LESSE/EngineeringLeader ANTHROPIC

![[assets/slides/aqW68Is_Kj4/slide-006.jpg]]

OCR text:

> ®
> EVOLVING CLAUDE APIS FOR AGENTS
> CEP AEEA MIRREN © KATELYN LESSE /Enoineering Leader, ANTHROP\C

![[assets/slides/aqW68Is_Kj4/slide-007.jpg]]

OCR text:

> i 7 Context engineering for agents
> Possible context to give model Context window
> 7 : Dt
> 7 EES 1 Esea- =
> ‘curation * | mesure
> : a! > ge
> : : : ‘ |
> (eer) 5 Goes “
> : : velty
> : Gere
> ' : : Atessoge history :
> | Toot : : ‘
> ernie gg
> Rem ETS SEI LIT coo as! y oe
> asinine Sl Lc ane 0) aE
> PRISEN TIO 8
> f : Weights & Biases i ‘
> Google DeepMind 29 ghts&Biases 4 senTRY 2 Daytona Aarize S<goose 7’,

![[assets/slides/aqW68Is_Kj4/slide-008.jpg]]

OCR text:

> MCP response=client.messages.create( mcp_servers=[ model="claude-sonnet-4-5-2025e929" max_tokens=4896, ("url":"mcp://github-server" qnub:weu
> ]=sabesso "role":"user"
> ANTHROPIC
> AIE/LEAD ntelligent Stanford Yegor Denisov-Blanch University DX JustinReock ITenex Arman Hezarkhani Lei Zhang Bloomberg GeneKim REVOLUTIC
> GoogleDeepMind PRESENTED BY neo4j autho Workos Sourcegraph stigg Weights&Biases byCoreWeave

![[assets/slides/aqW68Is_Kj4/slide-009.jpg]]

OCR text:

> response=client.messages.create(
> model="claude-s0nnet-4-5-20250929"
> Memory
> max_tokens=4896,
> messages=[{
> "role":"user",
> content":Debug why the payment service is timing out"
> Laude saves:
> Payment servtce uses 3es
> retrylogtcLn Paymentcllent.java,
> teami
> preters clrcuit breakerpattern
> ANTHROPIC
> AlEngineer
> Engineering the future of Al

![[assets/slides/aqW68Is_Kj4/slide-010.jpg]]

OCR text:

> Skills
> AIE

![[assets/slides/aqW68Is_Kj4/slide-011.jpg]]

OCR text:

> Code Summit
> Google Cloud

## Slide-Derived Subjects To Review
Subject extraction uses video title, related session titles/descriptions, transcript context, and OCR text when available. OCR is best-effort and should be reviewed against the embedded slide images.