Glossary

Context Window

The maximum amount of text (tokens) a model can consider at once.

A context window is the maximum number of tokens — roughly, chunks of text — a model can take into account in a single request. Everything the model 'sees' (your instructions, the code, prior conversation, tool output) must fit within it.

Context windows shape agent workflows: larger windows let an agent reason over more of a codebase at once, while smaller ones require careful selection and handoffs to preserve important context between sessions.

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Related guides on the Agents UI blog and related terms in this glossary.

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Related

Prompt Engineering

Structuring instructions and context so an AI model produces reliable, useful output.

AI Coding Agent

An AI program that autonomously reads, writes, and runs code to complete development tasks.

Ai Agent Handoffs Preserve Context Between Sessions

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Prompt Engineering For Ai Coding Agents

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