Amplifier can now build and test Alexa skills โ the same discipline that already exists for android, iOS, browser, and terminal, now extended to voice.
August 9, 2026
Every other surface already had a specialist tester โ driving the real thing, not just the code behind it.
You could build an Alexa skill. You just couldn't know it worked โ until you said it out loud to a device.
Drives your skill end-to-end against a live endpoint โ launches it, carries multi-turn dialogs, and confirms the backend actually changed state, not just that the response claimed it did.
Judges how it sounds: the "car test" โ would a person understand this by ear, with no way to scroll back โ plus every documented size and timing limit.
Root-causes it when something misbehaves โ telling apart a routing gap, a handler bug, a signature failure, and a lost session, which all look identical from outside.
Underneath all three: alexa_inspector, a single tool that builds, signs, sends, and validates real Alexa Skill requests and responses โ the actual wire boundary, not a hand-built dict passed to a function.
You can unit-test a handler all day and still not know: when someone actually says "what's next," does Alexa send it where you expect โ or somewhere else entirely?
The response envelope is the sensor. Local NLU is an approximation โ it can prove your handlers wrong, but it can never prove your utterances right.
Traditionally, answering that question means a human, a real phrase, and a speaker in the room. This bundle asks Amazon's own routing engine directly โ no Echo required โ and reports back exactly where the local guess and the real answer agree or disagree.
Testing a real skill, it found two things that ordinary testing missed โ both invisible from the outside, both fixed before they shipped further.
The endpoint rejected a bad signature with the wrong HTTP status โ a defect that would have failed Amazon's certification review.
Found โ FixedA phrase that was meant to be harmless quietly triggered a destructive action instead โ the exact kind of routing mismatch local testing cannot see.
Found โ FixedNeither was visible from ordinary testing.
The whole thesis of this bundle is not overclaiming. Here's exactly where the line sits.
Start with README.md, then docs/ADDING-ALEXA-TO-YOUR-APP.md if you want to give an existing app a voice.
github.com/microsoft/amplifier-bundle-alexa-tester
Now listed in docs/MODULES.md.
and Amplifier's testers cover screens, terminals, and voice alike.