[Coysh]

The runtime report has always described the disk a site sits on — volume sizes, free space, PHP limits — and said nothing about the Craft install doing the sitting. system.v3 adds four sections a site can answer about itself and nothing outside it can observe.

What it adds

Section	Fields
craft	deprecation_count, session_rows, security_key_set, cp_trigger_default
database	size_bytes
paths	storage, cpresources, config_project
php	missing_extensions, image_driver

The database size is the one worth calling out. Backups are the reason this package exists, and until now the report described every asset volume and the disk underneath them while saying nothing about the size of the thing being backed up — which is the figure that decides whether a backup finishes.

Compatibility

system.v1 and system.v2 are untouched, byte for byte. A connector sending either keeps working against any platform that accepted it before, and a platform that has not been upgraded keeps receiving exactly what it received: the connector picks the newest version both sides know, so neither has to move first.

What was left out, and why

Every addition has a more useful shape that this schema refuses, and the tests are what keep refusing it.

• A deprecation warning without its message is harder to act on — but the message names a template, a file and a line, and those are the site's own code. The count says whether there is a problem; finding it is done on the site, where the code already is.
• A database size without a table breakdown is harder to act on — but a per-table row count describes the shape of somebody's content, and a table name often describes their business.
• cp_trigger_default is a boolean, and there is no field for the trigger itself. A site that moved its control panel moved it somewhere it would rather not have written down; reporting the new address in somebody else's dashboard would undo the change being reported.
• security_key_set is presence, never the key.
• missing_extensions is a closed enum of Craft's published requirements, so it cannot become the loaded-extension inventory that php.extensions is reduced to a count to avoid. paths is a fixed set of Craft's own directory names for the same reason a volume sends a handle rather than a path — a free-form label is a filesystem path with extra steps.
• image_driver is which library, never which version. The version belongs to the host.
• Response compression is not here at all. It is decided at the edge, so a site behind a CDN would report its origin's answer rather than the one a visitor receives. It is observed from outside instead.

Checks

vendor/bin/pest — 400 passed, 2848 assertions. vendor/bin/phpstan analyse — no errors. The new fixtures cover both directions: a realistic v3 report, and one carrying the identifying half of every fact v3 added, asserted to be refused without the rejected values ever appearing in the error text.

CHANGELOG.md and the version in composer.json and Protocol::VERSION move with the change, in this commit.