What Scriptlog requires to run, and which of those requirements are enforced by the code rather than merely hoped for.

• PHP 7.4 – 8.5. The `develop` branch CI runs the unit suite on PHP 8.1, and a pre-commit hook runs a PHP 7.4-compatibility ruleset on staged files. The hook explicitly refuses to be bypassed.
• No framework, no ORM, no template engine. Dependencies are hand-wired in `lib/core/Bootstrap.php`. The only runtime package is a PSR-0/PSR-4 autoloader plus Dotenv, both under `lib/vendor/`.
• A writable `data/` tree for cache, media and state. Path constants come from `lib/options.php`.

`lib/main.php` checks for `config.php` before it will boot. If the file is absent and `install/` exists, the request is handed to the installer; if the installer is also gone, the request is terminated.

Two consequences worth knowing:

• The site cannot boot read-only for inspection. Reading a configuration file is a precondition for the framework existing at all.
• `config.php` is a `config.sample.php` derivative, so every deployment has to produce one before anything else works.

The table gives, per layer, the percentage of methods that are documented, that declare a return type, and whose parameters are fully typed. “Fully typed” is the strictest of the three: a single untyped parameter makes the method count against it.

These counts cover concrete classes and global functions only; interfaces and traits are excluded, so a layer's total is slightly below the method count on its module index. `dto` and `handler` reach 100% parameter typing on very few parameters (15 and 63 respectively), so treat those two as low-sample rather than as a trend.

Reading the table:

• Parameter typing is the weak column almost everywhere. Controllers sit at 14% and the admin UI at 0%, so request values reach most entry points untyped. That is what makes validator classes load-bearing rather than decorative.
• `utility` is the inversion of every other layer: 97% documented and only 9% of parameters typed, with 6% of functions declaring a return type. These are loosely-typed global helpers with strong docblocks, which is self-consistent but means the docblock is the only contract.
• Return types are absent in `model`, `validator` and `admin` (0% in all three). Callers cannot rely on a declared shape.
• `handler` is the most disciplined layer: 100% documented, 85% return-typed, 100% of parameters typed.
• `dao` is well documented (85%) and reasonably typed (30% returns, 29% parameters), which is the expected shape for the layer whose job is to be predictable.
• `tests` documents only 22% while typing 73% of returns and 45% of parameters. The suite is well-typed and largely undocumented, so a failing assertion often has to be read before it can be understood.
• `core` is the largest real-code layer at 782 methods and sits mid-table on every measure.

There are 14 first-party `@deprecated` annotations, and 13 of them are in a single file: `Scriptlog\Core\FrontHelper`. It is a facade kept alive on purpose, forwarding to `Scriptlog\Service\FrontService`. Themes written against the old helper name keep working because the facade still exists.

Its own docblock records why it exists, and it is worth quoting because it doubles as a boundary rule:

• Every data-access method delegates to the `FrontService` instance that `Bootstrap` registers through `FrontHelper::setFrontService()`.
• When no service is registered the methods return `null` or an empty array instead of falling back to raw SQL. The inline queries that used to be there were removed because they drifted from `FrontService`, used string interpolation, and one path was mysqli-only and broke on PDO.

So the facade is a genuine operational requirement — removing it, or rebuilding the autoload-alias map without it, breaks every un-updated theme — but it converts a hard failure into a silent empty result. That is documented on Limits and Non-behaviour.

The 14th annotation is on a member of `Scriptlog\Controller\DownloadController`.

The full verification command is `composer build`, which chains `phpstan:strict` (level 5 on `lib/`), `phpcs` against the `BlogwarePSR12` ruleset, the PHPUnit suite and `composer-audit`.

Static analysis is therefore part of the definition of done, not an optional extra. The level-5 ruleset is the strictest of the configured levels; code that passes it still must pass the PHP 7.4 compatibility ruleset at commit time.

• Limits and Non-behaviour
• Layer Boundaries and Dependencies
• Architecture Overview