Reasoning patterns — ReAct, plan-execute, reflection — and when each earns its cost.

In Lesson 3.14 of GROW Course 3 (Production Agentic Systems), Doug Liles works through it with you. A guide to choosing a reasoning pattern by the cost and reliability it buys.

What you'll take away

- The pattern menu

- ReAct

- Plan-and-execute

Chapters

(00:00) Cold open

[chapters set on audio scrub — see section 4]

Study guide, slide deck, blog companion, infographic (free)

- https://fde.goodcombinator.ai/lessons/FDE_Lesson_3_14

Audio companion is AI-narrated using NotebookLM. Explainer video is human-produced.

Public release

This full FDE Certification audio lesson is available publicly as part of GROW by Good Combinator.

Continue in GROW Skills Library: https://goodcombinator.com/grow/library

Episode metadata

Show: GROW by Good Combinator

Course: Course 3 - Production Agentic Systems

Lesson: 3.14

Season/Episode: 3/14

Runtime: — (audio pending)

Access label: public-full-lesson

Source channel: spotify

Source audio: app/lessons/assets/course-3/3.14/3.14 Why_AI_shouldn_t_check_its_own_work.m4a

Taxonomy: Domain=Production Agentic Systems; Career stage=FDE; Skill level=Intermediate; Asset type=Lesson; Outcome=Build

CRM events: course_started, lesson_completed, cert_enrolled

Transcript and accessibility

Final transcript required before launch: https://goodcombinator.com/grow/courses/course-3/lesson-3.14/transcript

Accessibility requirement: reviewed audio, clear title, descriptive show notes, and transcript availability before launch.

Audio companion is AI-narrated using NotebookLM and disclosed here.

Credits

Host: Doug Liles

Producer: Good Combinator

Audio: NotebookLM AI narration (disclosed)