poietic/flight-recorder

Record the answers your code got from the outside world while handling a request, and replay that exact request against the real code. A PHP implementation of the frozen tape-v1 wire format.

v0.1.0 2026-07-18 23:21 UTC

Requires

• php: >=8.1
• ext-json: *
• ext-tokenizer: *

Requires (Dev)

• phpunit/phpunit: ^10.5

Apache-2.0

• Xavier Grehant

• testing
• debugging
• deterministic
• record
• regression
• replay
• simulation
• observability
• nondeterminism

Published on Packagist.org on 2026-07-18 23:42 UTC

README

The PHP implementation of flight-recorder — record an app's tool calls at their nondeterminism boundary, replay them deterministically against the real code.

One guide covers install and every feature, in all six languages:

→ xag.github.io/flight-recorder

Source, the frozen tape spec, and license: github.com/xag/flight-recorder.