AI Agent
An AI agent is a software system that uses a large language model as its reasoning core to autonomously plan, execute, and adapt multi-step workflows using external tools and data sources. Unlike a simple chatbot that responds to one message at a time, an agent can decompose goals into subtasks, call APIs, read and write files, browse the web, and adjust its approach based on intermediate results.
Example
A coding AI agent receives the task "Fix the failing test in auth.test.ts." It reads the test file, identifies the failing assertion, traces the issue to a bug in the auth middleware, edits the source code, reruns the tests to confirm the fix, and commits the change — all without human intervention between steps.
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