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Spec-Driven Development in Python with Codex

Artificial Intelligence

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Learn spec-driven development in Python with Codex — write clear specifications first, then use AI to turn those specs into production-ready, well-tested APIs. Build the skills to guide AI-powered development from design through deployment.

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Build foundational understanding of SDD as an emerging methodology. Learn when specifications are valuable versus overkill, understand the role of AI in specification generation, build project constitutions that encode standards, create PRDs that persist as business documentation, read and evaluate existing specifications, and practice AI-assisted specification generation with critical review.

Course 2

Task Decomposition & Execution with Codex

5 lessons

16 practices

Master THE CORE SKILL of SDD: breaking complex features into atomic, AI-digestible tasks. Learn decomposition principles (1-3 files, clear criteria, explicit dependencies), practice on progressively complex features, execute tasks with Codex using test-first workflow. Experience common failure modes (scope creep, wrong dependencies, missing handoffs) and learn correction patterns.

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Course 3

Production APIs & Multi-Task Execution with Codex

5 lessons

17 practices

Master production SDD workflows on a shared TaskMaster codebase. Execute multi-task features (8-12 tasks) using Codex agent orchestration — fresh context per task, parallel workflows, quality pipelines, and production documentation — all governed by a consistent AGENTS.md constitution.

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Course 4

SDD Capstone - The Full SDD Lifecycle with Codex

3 lessons

9 practices

Apply the complete SDD lifecycle to RecipeBox, a recipe manager with meal planning and shopping lists. Plan with PRDs and domain models, implement foundation models and services using agent orchestration, and close the loop with architectural decision records and efficiency metrics.

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From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

Spec-Driven Development in Python with Codex

Trusted by learners working at top companies

Turn screen time into skills time

Join the 1M+ learners on CodeSignal

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