Lighthouse

Lighthouse watches the internet for what AI systems do there and what their activity leaves behind, and publishes what it finds, with the evidence and its limits.

Studies LH026

Drupal's published layers extend the fixed PHP base layers

The answer so far. The current published drupal:10.6-php8.3-fpm linux/amd64 image's 17 ordered filesystem layers begin with all 12 layers of the current php:8.3-fpm-trixie linux/amd64 image, matching both the compressed layer digests in their OCI manifests and the uncompressed rootfs.diff_ids in their configs. Both configs declare PHP_VERSION=8.3.36. This is content-level evidence that the selected derived artifact contains the selected fixed PHP base's filesystem layers, with five additional layers. It does not reconstruct the tag pointer seen by the historical build or prove a running Drupal deployment or the PHP executable's behaviour.

Write-up studies/LH026/LH026.md

From studies/LH026/ in the repository, last changed 9 November 2026.