How To Use Amazon Q Developer
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What it is
Amazon Q Developer is AWS’s coding assistant — the successor to CodeWhisperer — offering inline completions, agent-style tasks, and deep AWS service awareness.
Install / sign up
Rebranded from CodeWhisperer in 2024, Amazon Q Developer keeps the IDE completions engine and adds a chat agent, automated code upgrades (Java 8/11 to 17/21), and security scans tuned for AWS SDK patterns. It’s Amazon’s direct answer to Copilot and Cursor.
First session
Q Developer runs as an IDE plugin (VS Code, JetBrains, Visual Studio, Eclipse) and as a CLI. It covers three surfaces: inline suggestions as you type, a side-panel chat that can read your workspace, and agent tasks (/dev, /transform, /test) that produce multi-file pull requests. It reads your AWS account when you opt in, so it can answer questions like “why is this Lambda timing out” with real config.
Everyday workflows
After signing in, open a file and start typing — completions appear in grey, tab to accept. Open the Q panel to chat, or run /dev to kick off an agent task that produces a diff.
Gotchas and tips
The free Builder ID tier covers generous monthly inline suggestions and a handful of agent invocations; Pro ($19/user/month) lifts the limits and adds customisation on your private repos. Customisations require an S3 bucket of reference code and a one-time training job.
Who it’s for
Q Developer won’t suggest code that matches public repos verbatim when reference tracking is on — leave that setting enabled for license hygiene. For non-AWS projects the agent still works, but you lose the account-aware superpowers.