feat: Divi-Freigabe je Fähigkeit – CompatibilityMatrix aus Problemen mit Art und Fähigkeiten (ManifestCheck::problems), automatische Freigabe unveränderter Fähigkeiten (Filter lit_mcp_divi_auto_release), Mirror-Probleme im Transient (Format 2), ReleaseStatus trägt die Matrix

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/Admin/DiviTab.php

@@ -225,6 +225,13 @@ final class DiviTab implements AdminTab
         if ($status->source === ReleaseStatus::SOURCE_CODE) {
             return __('Diese Version ist im Plugin als getestet hinterlegt.', 'wp-lit-mcp');
         }
+        if ($status->source === ReleaseStatus::SOURCE_AUTO) {
+            return __(
+                // phpcs:ignore Generic.Files.LineLength.TooLong -- WordPress.WP.I18n forbids splitting the text argument.
+                'Automatisch freigegeben: Alle Divi-Stellen, die LIT MCP nutzt, stimmen mit der geprüften Referenz überein.',
+                'wp-lit-mcp'
+            );
+        }
 
         $user = get_userdata((int) ($status->release['user_id'] ?? 0));
         $releasedAt = (int) strtotime((string) ($status->release['released_at'] ?? ''));

src/Integrations/Divi/Release/CompatibilityMatrix.php

@@ -0,0 +1,136 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\Divi\Release;
+
+defined('ABSPATH') || exit;
+
+/**
+ * The release state of every Divi feature (E1). A feature the constructor did not get is incompatible (fail
+ * closed), so of() always answers. The overall state of the matrix is its worst feature state.
+ */
+final class CompatibilityMatrix
+{
+    public const MISSING = 'Für diese Fähigkeit liegt kein Prüfergebnis vor.';
+
+    /** @var array<string, FeatureStatus> keyed by DiviFeature value, in DiviFeature::cases() order */
+    private array $features = [];
+
+    /** @param array<string, FeatureStatus> $features keyed by DiviFeature value */
+    public function __construct(array $features)
+    {
+        foreach (DiviFeature::cases() as $feature) {
+            $status = $features[$feature->value] ?? null;
+            $this->features[$feature->value] = $status instanceof FeatureStatus && $status->feature === $feature
+                ? $status
+                : new FeatureStatus($feature, ReleaseState::Incompatible, [self::MISSING]);
+        }
+    }
+
+    public static function allReleased(string $source = ReleaseStatus::SOURCE_CODE): self
+    {
+        return self::uniform(ReleaseState::Released, [], $source);
+    }
+
+    public static function allIncompatible(string $problem): self
+    {
+        return self::uniform(ReleaseState::Incompatible, [$problem]);
+    }
+
+    /**
+     * Every feature in $state – the matrix of a status built without one (ReleaseStatus' constructor).
+     *
+     * @param list<string> $problems
+     */
+    public static function uniform(ReleaseState $state, array $problems = [], ?string $source = null): self
+    {
+        $released = $state === ReleaseState::Released;
+        $features = [];
+        foreach (DiviFeature::cases() as $feature) {
+            $features[$feature->value] = new FeatureStatus(
+                $feature,
+                $state,
+                $released ? [] : $problems,
+                $released ? ($source ?? ReleaseStatus::SOURCE_CODE) : null
+            );
+        }
+
+        return new self($features);
+    }
+
+    /** @return list<DiviFeature> The features that write (ReleaseGate::assertWritable(), ReleaseStatus::writable()). */
+    public static function writeFeatures(): array
+    {
+        return array_values(array_filter(
+            DiviFeature::cases(),
+            static fn (DiviFeature $feature): bool => $feature->isWrite()
+        ));
+    }
+
+    public function of(DiviFeature $feature): FeatureStatus
+    {
+        return $this->features[$feature->value];
+    }
+
+    /** @param list<DiviFeature> $features */
+    public function usable(array $features): bool
+    {
+        foreach ($features as $feature) {
+            if (! $this->of($feature)->usable()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /** @return list<FeatureStatus> */
+    public function unusable(): array
+    {
+        return array_values(array_filter(
+            $this->features,
+            static fn (FeatureStatus $status): bool => ! $status->usable()
+        ));
+    }
+
+    /** Incompatible before untested before released. */
+    public function state(): ReleaseState
+    {
+        $states = array_map(static fn (FeatureStatus $status): ReleaseState => $status->state, $this->features);
+
+        return match (true) {
+            in_array(ReleaseState::Incompatible, $states, true) => ReleaseState::Incompatible,
+            in_array(ReleaseState::Untested, $states, true) => ReleaseState::Untested,
+            default => ReleaseState::Released,
+        };
+    }
+
+    /** The common source of a fully released matrix; null when not all released or the sources differ. */
+    public function source(): ?string
+    {
+        $sources = array_unique(array_map(
+            static fn (FeatureStatus $status): string => (string) $status->source,
+            $this->features
+        ));
+
+        return $this->state() === ReleaseState::Released && count($sources) === 1 ? (string) reset($sources) : null;
+    }
+
+    /** @return list<string> Every problem label once, in feature order. */
+    public function problems(): array
+    {
+        $problems = [];
+        foreach ($this->features as $status) {
+            $problems = array_merge($problems, $status->problems);
+        }
+
+        return array_values(array_unique($problems));
+    }
+
+    /** @return list<array{id: string, label: string, state: string, problems: list<string>, source: ?string}> */
+    public function toArray(): array
+    {
+        return array_values(array_map(static fn (FeatureStatus $status): array => $status->toArray(), $this->features));
+    }
+}

src/Integrations/Divi/Release/FeatureStatus.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\Divi\Release;
+
+defined('ABSPATH') || exit;
+
+/** The release state of one Divi feature (E1): released (with its source), untested or incompatible. */
+final class FeatureStatus
+{
+    /**
+     * @param list<string> $problems Labels of the problems behind the state (Problem::$label).
+     * @param string|null  $source   For a released feature: ReleaseStatus::SOURCE_CODE, SOURCE_DATABASE or
+     *                               SOURCE_AUTO; null otherwise.
+     */
+    public function __construct(
+        public readonly DiviFeature $feature,
+        public readonly ReleaseState $state,
+        public readonly array $problems = [],
+        public readonly ?string $source = null
+    ) {
+    }
+
+    public function usable(): bool
+    {
+        return $this->state === ReleaseState::Released;
+    }
+
+    /** @return array{id: string, label: string, state: string, problems: list<string>} For refusals (D6). */
+    public function summary(): array
+    {
+        return [
+            'id' => $this->feature->value,
+            'label' => $this->feature->label(),
+            'state' => $this->state->value,
+            'problems' => $this->problems,
+        ];
+    }
+
+    /**
+     * @return array{id: string, label: string, state: string, problems: list<string>, source: ?string}
+     *         For lit-site-status and the admin tab.
+     */
+    public function toArray(): array
+    {
+        return $this->summary() + ['source' => $this->source];
+    }
+}

src/Integrations/Divi/Release/ManifestCheck.php

@@ -13,8 +13,9 @@ use Throwable;
 defined('ABSPATH') || exit;
 
 /**
- * The checks of all adapter manifests (spec §4.3), as label => check. Code checks (calls with the argument count
- * the adapter passes, constants) and mirror checks decide the release gate; registration checks (post types,
+ * The checks of all adapter manifests (spec §4.3), as label => check for reports, and as problems with their Divi
+ * features for the release matrix (problems(), E1). Code checks (calls with the argument count the adapter passes
+ * and their signature, constants) and mirror checks decide the release gate; registration checks (post types,
  * taxonomies, block types) depend on the request context (stage3 finding 6) and only show in reports.
  *
  * Not final so the resolver can be tested with a mock.
@@ -32,7 +33,8 @@ class ManifestCheck
 
     /**
      * @param array<string, Manifest>|null     $manifests  null = DiviAdapters::manifests().
-     * @param array<string, string>|null       $expected   Mirror ID => sha256; null = DiviReference::expected().
+     * @param array<string, string>|null       $expected   Mirror ID or "sig:<symbol>" => sha256;
+     *                                                     null = DiviReference::expected().
      * @param (Closure(Mirror): ?string)|null  $current    Hash of the installed mirror, null = unreadable;
      *                                                     null = SourceFingerprint in the Divi theme directory.
      * @param (Closure(string): bool)|null     $knowsBlock null = DiviModules::knowsBlock().
@@ -71,12 +73,7 @@ class ManifestCheck
         $checks = [];
         foreach ($this->manifests as $manifest) {
             foreach ($manifest->mirrors as $mirror) {
-                $label = sprintf('%s: Nachbau von %s – %s', $manifest->area, $mirror->label(), $mirror->what);
-                $checks[$label] = function () use ($mirror): bool {
-                    $expected = ($this->expected ??= DiviReference::expected())[$mirror->id] ?? null;
-
-                    return $expected !== null && ($this->current)($mirror) === $expected;
-                };
+                $checks[self::mirrorLabel($manifest, $mirror)] = fn (): bool => $this->matches($mirror);
             }
         }
 
@@ -111,12 +108,7 @@ class ManifestCheck
     {
         $failed = [];
         foreach ($checks as $label => $check) {
-            try {
-                $ok = (bool) $check();
-            } catch (Throwable) {
-                $ok = false;
-            }
-            if (! $ok) {
+            if (! self::passes($check)) {
                 $failed[] = (string) $label;
             }
         }
@@ -124,6 +116,67 @@ class ManifestCheck
         return $failed;
     }
 
+    /** @return list<Problem> Code and mirror problems with their features – what the release matrix is built of. */
+    public function problems(): array
+    {
+        return array_merge($this->codeProblems(), $this->mirrorProblems());
+    }
+
+    /**
+     * Calls (missing or other argument count: call; no reference: reference-missing; other signature: signature)
+     * and constants. Reflection only – cheap enough for every request.
+     *
+     * @return list<Problem>
+     */
+    public function codeProblems(): array
+    {
+        $problems = [];
+        foreach ($this->manifests as $manifest) {
+            foreach ($manifest->calls as $call) {
+                $problem = $this->callProblem($manifest, $call);
+                if ($problem !== null) {
+                    $problems[] = $problem;
+                }
+            }
+            foreach ($manifest->constants as $constant) {
+                if (! defined($constant->name)) {
+                    $problems[] = new Problem(
+                        $manifest->area . ': ' . $constant->label(),
+                        $manifest->featuresOf($constant),
+                        Problem::CONSTANT
+                    );
+                }
+            }
+        }
+
+        return $problems;
+    }
+
+    /**
+     * Mirrors that differ from their reference, cannot be read or have no reference – kind mirror in every case:
+     * a mirror repeats how Divi writes, so it never runs unverified, whatever the release. Reads Divi files; the
+     * resolver caches the result.
+     *
+     * @return list<Problem>
+     */
+    public function mirrorProblems(): array
+    {
+        $problems = [];
+        foreach ($this->manifests as $manifest) {
+            foreach ($manifest->mirrors as $mirror) {
+                if (! self::passes(fn (): bool => $this->matches($mirror))) {
+                    $problems[] = new Problem(
+                        self::mirrorLabel($manifest, $mirror),
+                        $manifest->featuresOf($mirror),
+                        Problem::MIRROR
+                    );
+                }
+            }
+        }
+
+        return $problems;
+    }
+
     /** The function or method exists and takes the number of arguments the adapter passes. */
     public static function accepts(Call $call): bool
     {
@@ -145,6 +198,53 @@ class ManifestCheck
                 && ($reflection->isVariadic() || $reflection->getNumberOfParameters() >= $call->args));
     }
 
+    private function callProblem(Manifest $manifest, Call $call): ?Problem
+    {
+        $label = $manifest->area . ': ' . $call->label();
+        $features = $manifest->featuresOf($call);
+        if (! self::passes(static fn (): bool => self::accepts($call))) {
+            return new Problem($label, $features, Problem::CALL);
+        }
+
+        $expected = $this->expected()[DiviReference::signatureKey($call)] ?? null;
+        if ($expected === null) {
+            return new Problem($label . ' – Referenz der Signatur fehlt', $features, Problem::REFERENCE_MISSING);
+        }
+
+        return self::passes(static fn (): bool => SignatureFingerprint::of($call) === $expected)
+            ? null
+            : new Problem($label . ' – Signatur geändert', $features, Problem::SIGNATURE);
+    }
+
+    /** The mirror's reference exists and the installed source has the same fingerprint. */
+    private function matches(Mirror $mirror): bool
+    {
+        $expected = $this->expected()[$mirror->id] ?? null;
+
+        return $expected !== null && ($this->current)($mirror) === $expected;
+    }
+
+    /** @return array<string, string> */
+    private function expected(): array
+    {
+        return $this->expected ??= DiviReference::expected();
+    }
+
+    private static function mirrorLabel(Manifest $manifest, Mirror $mirror): string
+    {
+        return sprintf('%s: Nachbau von %s – %s', $manifest->area, $mirror->label(), $mirror->what);
+    }
+
+    /** @param callable(): bool $check A check that throws failed. */
+    private static function passes(callable $check): bool
+    {
+        try {
+            return (bool) $check();
+        } catch (Throwable) {
+            return false;
+        }
+    }
+
     private static function installed(Mirror $mirror): ?string
     {
         $dir = DiviEnvironment::themeDir();

src/Integrations/Divi/Release/Problem.php

@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Integrations\Divi\Release;
+
+defined('ABSPATH') || exit;
+
+/**
+ * One failed manifest check and the Divi features it concerns (Manifest::featuresOf()). The kind decides how the
+ * resolver weighs it (E1): call, mirror and constant lock their features for every Divi version, released or not;
+ * signature and reference-missing only matter for a version without release (automatic release). A problem without
+ * features concerns every feature (fail closed).
+ */
+final class Problem
+{
+    public const CALL = 'call';
+    public const SIGNATURE = 'signature';
+    public const MIRROR = 'mirror';
+    public const CONSTANT = 'constant';
+    public const REFERENCE_MISSING = 'reference-missing';
+    public const RESOLVER = 'resolver';
+
+    private const KINDS = [
+        self::CALL,
+        self::SIGNATURE,
+        self::MIRROR,
+        self::CONSTANT,
+        self::REFERENCE_MISSING,
+        self::RESOLVER,
+    ];
+    private const HARD = [self::CALL, self::MIRROR, self::CONSTANT, self::RESOLVER];
+
+    /**
+     * @param string            $label    German, e.g. "Seiten: et_x()" (the labels of ManifestCheck).
+     * @param list<DiviFeature> $features
+     * @param string            $kind     One of the constants above.
+     */
+    public function __construct(
+        public readonly string $label,
+        public readonly array $features,
+        public readonly string $kind
+    ) {
+    }
+
+    /** Locks its features whatever the release (the code no longer fits Divi or a mirror differs). */
+    public function isHard(): bool
+    {
+        return in_array($this->kind, self::HARD, true);
+    }
+
+    public function concerns(DiviFeature $feature): bool
+    {
+        return $this->features === [] || in_array($feature, $this->features, true);
+    }
+
+    /** @return array{label: string, kind: string, features: list<string>} For the transient. */
+    public function toArray(): array
+    {
+        return [
+            'label' => $this->label,
+            'kind' => $this->kind,
+            'features' => array_map(static fn (DiviFeature $feature): string => $feature->value, $this->features),
+        ];
+    }
+
+    /** The problem of toArray(), or null for anything else (an unknown kind or feature included). */
+    public static function fromArray(mixed $row): ?self
+    {
+        if (
+            ! is_array($row)
+            || ! is_string($row['label'] ?? null)
+            || ! in_array($row['kind'] ?? null, self::KINDS, true)
+            || ! is_array($row['features'] ?? null)
+        ) {
+            return null;
+        }
+
+        $features = [];
+        foreach ($row['features'] as $value) {
+            $feature = is_string($value) ? DiviFeature::tryFrom($value) : null;
+            if ($feature === null) {
+                return null;
+            }
+            $features[] = $feature;
+        }
+
+        return new self($row['label'], $features, $row['kind']);
+    }
+}

src/Integrations/Divi/Release/ReleaseGate.php

@@ -24,7 +24,9 @@ final class ReleaseGate
 
     private static ?int $probe = null;
 
-    /** Spec §9: a status that cannot be determined locks writes like an incompatible Divi (and is logged). */
+    private const UNRESOLVED = 'Der Freigabe-Zustand ließ sich nicht ermitteln (Details im PHP-Error-Log).';
+
+    /** Spec §9: a status that cannot be determined locks every feature as incompatible (and is logged). */
     public static function status(): ReleaseStatus
     {
         if (self::$status !== null) {
@@ -35,12 +37,7 @@ final class ReleaseGate
             self::$status = (self::$resolver ?? static fn (): ReleaseStatus => (new ReleaseResolver())->resolve())();
         } catch (Throwable $e) {
             Log::failure('divi release status', $e);
-            self::$status = new ReleaseStatus(
-                ReleaseState::Incompatible,
-                '',
-                null,
-                ['Der Freigabe-Zustand ließ sich nicht ermitteln (Details im PHP-Error-Log).']
-            );
+            self::$status = ReleaseStatus::of('', CompatibilityMatrix::allIncompatible(self::UNRESOLVED));
         }
 
         return self::$status;

src/Integrations/Divi/Release/ReleaseResolver.php

@@ -10,13 +10,24 @@ use LIT\MCP\Plugin;
 defined('ABSPATH') || exit;
 
 /**
- * Computes the release status (spec §5.2–§5.4): code checks live (cheap), mirror checks cached in a transient under
- * stateKey() – Divi version, plugin version, fingerprints.json and the modification times of the mirrored Divi
- * files, so a Divi update or hotfix is checked again at once.
+ * Computes the release status (spec §5.2–§5.4) as a matrix of Divi features (E1). Code and signature checks run
+ * live (Reflection, cheap; a hotfix without a new version number is seen at once), mirror checks are cached in a
+ * transient under stateKey() – Divi version, plugin version, fingerprints.json (mirror and signature references) and
+ * the modification times of the mirrored Divi files.
+ *
+ * Per feature: a hard problem (call, mirror, constant) makes it incompatible, released version or not. A released
+ * version (DiviReleases::TESTED, source code; ReleaseStore, source database) releases every other feature – its
+ * release covers signatures. Otherwise, with the automatic release on (filter lit_mcp_divi_auto_release, default
+ * true) and a known version: a changed signature makes the feature incompatible, a missing reference untested,
+ * no problem releases it (source auto). Without the automatic release every other feature is untested.
  */
 final class ReleaseResolver
 {
     public const CACHE = 'lit_mcp_divi_state';
+    public const AUTO_RELEASE_FILTER = 'lit_mcp_divi_auto_release';
+
+    /** Version of the transient's layout; an entry without it (the list of labels before) is a miss. */
+    private const CACHE_FORMAT = 2;
 
     /**
      * @param (Closure(): ?string)|null      $version  null = DiviEnvironment::version().
@@ -34,22 +45,17 @@ final class ReleaseResolver
     {
         $version = ($this->version ?? DiviEnvironment::version(...))() ?? '';
         $check = $this->check ?? new ManifestCheck();
-        $problems = array_merge(
-            ManifestCheck::failed($check->codeChecks()),
-            $this->mirrorProblems($check, $version)
-        );
+        $problems = array_merge($check->codeProblems(), $this->mirrorProblems($check, $version));
 
-        if ($problems !== []) {
-            return new ReleaseStatus(ReleaseState::Incompatible, $version, null, $problems);
-        }
         if (in_array($version, DiviReleases::TESTED, true)) {
-            return ReleaseStatus::released($version);
+            return ReleaseStatus::of($version, self::matrix($problems, ReleaseStatus::SOURCE_CODE, false));
+        }
+        $entry = $version === '' ? null : ($this->store ?? new ReleaseStore())->find($version, Plugin::VERSION);
+        if ($entry !== null) {
+            return ReleaseStatus::of($version, self::matrix($problems, ReleaseStatus::SOURCE_DATABASE, false), $entry);
         }
-        $entry = ($this->store ?? new ReleaseStore())->find($version, Plugin::VERSION);
 
-        return $entry !== null
-            ? new ReleaseStatus(ReleaseState::Released, $version, ReleaseStatus::SOURCE_DATABASE, [], $entry)
-            : new ReleaseStatus(ReleaseState::Untested, $version);
+        return ReleaseStatus::of($version, self::matrix($problems, null, $version !== '' && self::automatic()));
     }
 
     /** What the cached mirror results and a check report are valid for. */
@@ -69,17 +75,111 @@ final class ReleaseResolver
         return hash('sha256', implode('|', $parts));
     }
 
-    /** @return list<string> */
+    /** Only a literal true switches the automatic release on (fail closed). */
+    private static function automatic(): bool
+    {
+        return apply_filters(self::AUTO_RELEASE_FILTER, true) === true;
+    }
+
+    /**
+     * @param list<Problem> $problems
+     * @param string|null   $source    SOURCE_CODE or SOURCE_DATABASE for a released version, else null.
+     * @param bool          $automatic The automatic release applies (no release, known version, filter on).
+     */
+    private static function matrix(array $problems, ?string $source, bool $automatic): CompatibilityMatrix
+    {
+        $features = [];
+        foreach (DiviFeature::cases() as $feature) {
+            $concerning = array_values(array_filter(
+                $problems,
+                static fn (Problem $problem): bool => $problem->concerns($feature)
+            ));
+            $features[$feature->value] = self::feature($feature, $concerning, $source, $automatic);
+        }
+
+        return new CompatibilityMatrix($features);
+    }
+
+    /** @param list<Problem> $problems The problems concerning $feature. */
+    private static function feature(
+        DiviFeature $feature,
+        array $problems,
+        ?string $source,
+        bool $automatic
+    ): FeatureStatus {
+        $hard = array_filter($problems, static fn (Problem $problem): bool => $problem->isHard());
+        if ($hard !== []) {
+            return new FeatureStatus($feature, ReleaseState::Incompatible, self::labels($hard));
+        }
+        if ($source !== null) {
+            return new FeatureStatus($feature, ReleaseState::Released, [], $source);
+        }
+        if (! $automatic) {
+            return new FeatureStatus($feature, ReleaseState::Untested, self::labels($problems));
+        }
+
+        $changed = array_filter($problems, static fn (Problem $problem): bool => $problem->kind === Problem::SIGNATURE);
+        if ($changed !== []) {
+            return new FeatureStatus($feature, ReleaseState::Incompatible, self::labels($changed));
+        }
+
+        return $problems === []
+            ? new FeatureStatus($feature, ReleaseState::Released, [], ReleaseStatus::SOURCE_AUTO)
+            : new FeatureStatus($feature, ReleaseState::Untested, self::labels($problems));
+    }
+
+    /**
+     * @param array<int, Problem> $problems
+     * @return list<string>
+     */
+    private static function labels(array $problems): array
+    {
+        return array_values(array_map(static fn (Problem $problem): string => $problem->label, $problems));
+    }
+
+    /** @return list<Problem> */
     private function mirrorProblems(ManifestCheck $check, string $version): array
     {
         $key = ($this->stateKey ?? self::stateKey(...))($version);
-        $cached = get_transient(self::CACHE);
-        if (is_array($cached) && ($cached['key'] ?? null) === $key && is_array($cached['problems'] ?? null)) {
-            return array_values(array_filter($cached['problems'], 'is_string'));
+        $cached = self::cached(get_transient(self::CACHE), $key);
+        if ($cached !== null) {
+            return $cached;
         }
 
-        $problems = ManifestCheck::failed($check->mirrorChecks());
-        set_transient(self::CACHE, ['key' => $key, 'problems' => $problems], DAY_IN_SECONDS);
+        $problems = $check->mirrorProblems();
+        set_transient(
+            self::CACHE,
+            [
+                'format' => self::CACHE_FORMAT,
+                'key' => $key,
+                'problems' => array_map(static fn (Problem $problem): array => $problem->toArray(), $problems),
+            ],
+            DAY_IN_SECONDS
+        );
+
+        return $problems;
+    }
+
+    /** @return list<Problem>|null null = miss: none, another key, the old format or any unreadable row. */
+    private static function cached(mixed $entry, string $key): ?array
+    {
+        if (
+            ! is_array($entry)
+            || ($entry['format'] ?? null) !== self::CACHE_FORMAT
+            || ($entry['key'] ?? null) !== $key
+            || ! is_array($entry['problems'] ?? null)
+        ) {
+            return null;
+        }
+
+        $problems = [];
+        foreach ($entry['problems'] as $row) {
+            $problem = Problem::fromArray($row);
+            if ($problem === null) {
+                return null;
+            }
+            $problems[] = $problem;
+        }
 
         return $problems;
     }

src/Integrations/Divi/Release/ReleaseStatus.php

@@ -10,11 +10,15 @@ use WP_Error;
 
 defined('ABSPATH') || exit;
 
-/** Whether LIT MCP may write with the installed Divi (spec §5.2), with the texts of spec §5.6. */
+/**
+ * The release of the installed Divi (spec §5.2): the matrix of its features (E1) and, for callers that know no
+ * features, the overall state (the worst feature state) with every problem, and the texts of spec §5.6.
+ */
 final class ReleaseStatus
 {
     public const SOURCE_CODE = 'code';
     public const SOURCE_DATABASE = 'database';
+    public const SOURCE_AUTO = 'auto';
 
     private const UNTESTED = 'Achtung: %s ist auf dieser Website noch nicht für LIT MCP freigegeben. Schreibende '
         . 'Divi-Werkzeuge sind gesperrt, bis ein Administrator unter Einstellungen → LIT MCP → Divi die Prüfung '
@@ -27,19 +31,35 @@ final class ReleaseStatus
         . 'Divi-Werkzeuge funktionieren weiter.';
     private const NOTICE = 'Achtung: %s ist für LIT MCP %s; Lesen funktioniert, Schreiben ist gesperrt.';
 
+    public readonly CompatibilityMatrix $matrix;
+
     /**
+     * Without $matrix every feature is in $state (CompatibilityMatrix::uniform()); with one, use of().
+     *
      * @param string                    $version  Divi version, '' when unknown (Divi is not the active template).
-     * @param string|null               $source   SOURCE_CODE or SOURCE_DATABASE for a released version.
+     * @param string|null               $source   SOURCE_CODE, SOURCE_DATABASE or SOURCE_AUTO for a released version.
      * @param list<string>              $problems Failed code and mirror checks (ManifestCheck labels).
      * @param array<string, mixed>|null $release  The database entry of a SOURCE_DATABASE release.
+     * @throws LogicException When $matrix is in another state than $state.
      */
     public function __construct(
         public readonly ReleaseState $state,
         public readonly string $version,
         public readonly ?string $source = null,
         public readonly array $problems = [],
-        public readonly ?array $release = null
+        public readonly ?array $release = null,
+        ?CompatibilityMatrix $matrix = null
     ) {
+        if ($matrix !== null && $matrix->state() !== $state) {
+            throw new LogicException('the matrix is ' . $matrix->state()->value . ', not ' . $state->value);
+        }
+        $this->matrix = $matrix ?? CompatibilityMatrix::uniform($state, $problems, $source);
+    }
+
+    /** @param array<string, mixed>|null $release The database entry of a SOURCE_DATABASE release. */
+    public static function of(string $version, CompatibilityMatrix $matrix, ?array $release = null): self
+    {
+        return new self($matrix->state(), $version, $matrix->source(), $matrix->problems(), $release, $matrix);
     }
 
     public static function released(string $version, string $source = self::SOURCE_CODE): self
@@ -47,9 +67,10 @@ final class ReleaseStatus
         return new self(ReleaseState::Released, $version, $source);
     }
 
+    /** Every writing feature is usable – for callers that know no feature (DiviToolGate, DiviContentComposer). */
     public function writable(): bool
     {
-        return $this->state === ReleaseState::Released;
+        return $this->matrix->usable(CompatibilityMatrix::writeFeatures());
     }
 
     public function versionLabel(): string