diff --git a/src/Handler/Http/Middleware/XHProfTrap.php b/src/Handler/Http/Middleware/XHProfTrap.php
index f2b56cc4..662bc0dd 100644
--- a/src/Handler/Http/Middleware/XHProfTrap.php
+++ b/src/Handler/Http/Middleware/XHProfTrap.php
@@ -70,18 +70,17 @@ private function processStore(ServerRequestInterface $request): ResponseInterfac
         /** @var XHProfMessage $payload */
         $payload = \json_decode((string) $request->getBody(), true, 96, \JSON_THROW_ON_ERROR);
 
+        \is_array($payload['profile'] ?? null) && \is_array($payload['tags'] ?? null)
+        or throw new \InvalidArgumentException('Invalid payload');
+
         $metadata = $payload;
         unset($metadata['profile'], $metadata['tags'], $metadata['date']);
 
-        isset($payload['profile'], $payload['tags'])
-            && \is_array($payload['profile'])
-            && \is_array($payload['tags'])
-            or throw new \InvalidArgumentException('Invalid payload');
-
-        /** @psalm-suppress MixedAssignment */
+        /** @var mixed $time */
         $time = $request->getAttribute('begin_at');
         $time = $time instanceof \DateTimeImmutable ? $time : new \DateTimeImmutable();
 
+        /** @psalm-suppress MixedArgumentTypeCoercion */
         \Fiber::suspend(
             new Frame\Profiler(
                 payload: Frame\Profiler\Payload::new(
diff --git a/src/Module/Profiler/Struct/Profile.php b/src/Module/Profiler/Struct/Profile.php
index 5123ae5c..b9052276 100644
--- a/src/Module/Profiler/Struct/Profile.php
+++ b/src/Module/Profiler/Struct/Profile.php
@@ -9,6 +9,7 @@
  *     app_name?: string,
  *     hostname?: string,
  *     filename?: string,
+ *     filesize?: int<0, max>,
  *     ...
  * }
  *
@@ -30,6 +31,7 @@
 final class Profile implements \JsonSerializable
 {
     public Peaks $peaks;
+    public Tree $calls;
 
     /**
      * @param Metadata $metadata
@@ -40,9 +42,10 @@ public function __construct(
         public \DateTimeInterface $date = new \DateTimeImmutable(),
         public array $metadata = [],
         public array $tags = [],
-        public Tree $calls = new Tree(),
+        ?Tree $calls = null,
         ?Peaks $peaks = null,
     ) {
+        $this->calls = $calls ?? new Tree();
         if ($peaks === null) {
             $this->peaks = new Peaks();
 
@@ -57,28 +60,32 @@ public function __construct(
 
     /**
      * @param ProfileData $data
+     * @psalm-suppress all
      */
     public static function fromArray(array $data): self
     {
         $metadata = $data;
         unset($metadata['tags'], $metadata['peaks'], $metadata['total_edges'], $metadata['date']);
 
-        $self = new self(
+        return new self(
             date: new \DateTimeImmutable('@' . $data['date']),
             metadata: $metadata,
             tags: $data['tags'],
             // todo calls from edges
             peaks: Peaks::fromArray($data['peaks']),
         );
-
-        return $self;
     }
 
     /**
      * @return ProfileData
+     * @psalm-suppress all
      */
     public function jsonSerialize(): array
     {
+        /** @var array<non-empty-string, array> $edges */
+        $edges = \iterator_to_array($this->calls->getItemsSortedV1(
+            static fn(Branch $a, Branch $b): int => $b->item->cost->wt <=> $a->item->cost->wt,
+        ));
         return [
             'date' => $this->date->getTimestamp(),
             'app_name' => $this->metadata['app_name'] ?? '',
@@ -86,9 +93,7 @@ public function jsonSerialize(): array
             'filename' => $this->metadata['filename'] ?? '',
             'tags' => $this->tags,
             'peaks' => $this->peaks,
-            'edges' => \iterator_to_array($this->calls->getItemsSortedV1(
-                static fn(Branch $a, Branch $b): int => $b->item->cost->wt <=> $a->item->cost->wt,
-            )),
+            'edges' => $edges,
             'total_edges' => $this->calls->count(),
         ];
     }
diff --git a/src/Proto/Frame/Profiler.php b/src/Proto/Frame/Profiler.php
index df15912d..c1039d48 100644
--- a/src/Proto/Frame/Profiler.php
+++ b/src/Proto/Frame/Profiler.php
@@ -4,13 +4,13 @@
 
 namespace Buggregator\Trap\Proto\Frame;
 
+use Buggregator\Trap\Module\Profiler\Struct\Profile;
 use Buggregator\Trap\Proto\Frame;
 use Buggregator\Trap\ProtoType;
 use Buggregator\Trap\Support\Json;
 
 /**
- * @psalm-import-type Calls from \Buggregator\Trap\Proto\Frame\Profiler\Payload
- * @psalm-import-type Metadata from \Buggregator\Trap\Proto\Frame\Profiler\Payload
+ * @psalm-import-type ProfileData from Profile
  *
  * @internal
  * @psalm-internal Buggregator
@@ -26,7 +26,7 @@ public function __construct(
 
     public static function fromString(string $payload, \DateTimeImmutable $time): static
     {
-        /** @var array{type: non-empty-string}&Calls&Metadata $data */
+        /** @var array{type: non-empty-string}|ProfileData $data */
         $data = Json::decode($payload);
 
         return new self(Frame\Profiler\Payload::fromArray($data), $time);
diff --git a/src/Proto/Frame/Profiler/Payload.php b/src/Proto/Frame/Profiler/Payload.php
index 249a6833..51fd02c6 100644
--- a/src/Proto/Frame/Profiler/Payload.php
+++ b/src/Proto/Frame/Profiler/Payload.php
@@ -45,15 +45,21 @@ public static function new(
     }
 
     /**
-     * @param array{type: non-empty-string}&ProfileData $data
+     * @param array{type: non-empty-string}|ProfileData $data
      */
     public static function fromArray(array $data, ?PayloadType $type = null): static
     {
-        /** @var \Closure(): Profile $provider */
+        /**
+         * @var \Closure(): Profile $provider
+         * @psalm-suppress all
+         */
         $provider = static fn(): Profile => Profile::fromArray($data);
 
+        /** @psalm-suppress all */
+        $type ??= PayloadType::from($data['type']);
+
         return new self(
-            $type ?? PayloadType::from($data['type']),
+            $type,
             $provider,
         );
     }
@@ -64,7 +70,7 @@ public function getProfile(): Profile
     }
 
     /**
-     * @return array{type: non-empty-string}&ProfileData
+     * @return array{type: non-empty-string}|ProfileData
      */
     public function toArray(): array
     {
@@ -72,7 +78,7 @@ public function toArray(): array
     }
 
     /**
-     * @return array{type: non-empty-string}&ProfileData
+     * @return array{type: non-empty-string}|ProfileData
      */
     public function jsonSerialize(): array
     {
diff --git a/src/Sender/Console/Renderer/Profiler.php b/src/Sender/Console/Renderer/Profiler.php
index 2ba95d5f..7d7cdaf9 100644
--- a/src/Sender/Console/Renderer/Profiler.php
+++ b/src/Sender/Console/Renderer/Profiler.php
@@ -24,6 +24,9 @@ public function isSupport(Frame $frame): bool
         return $frame->type === ProtoType::Profiler;
     }
 
+    /**
+     * @psalm-suppress MixedAssignment
+     */
     public function render(OutputInterface $output, Frame $frame): void
     {
         \assert($frame instanceof Frame\Profiler);
@@ -37,11 +40,11 @@ public function render(OutputInterface $output, Frame $frame): void
         $data = [];
         isset($metadata['date']) && \is_numeric($metadata['date'])
         and $data['Time'] = new \DateTimeImmutable('@' . $metadata['date']);
-        isset($metadata['app_name']) and $data['App name'] = $metadata['app_name'];
-        isset($metadata['hostname']) and $data['Hostname'] = $metadata['hostname'];
-        isset($metadata['filename']) and $data['File name'] = $metadata['filename'] . (
-            isset($metadata['filesize']) && \is_int($metadata['filesize'])
-                ? ' (' . Measure::memory($metadata['filesize']) . ')'
+        \is_string($m = $metadata['app_name'] ?? null) and $data['App name'] = $m;
+        \is_string($m = $metadata['hostname'] ?? null) and $data['Hostname'] = $m;
+        \is_string($m = $metadata['filename'] ?? null) and $data['File name'] = $m . (
+            \is_int($m = $metadata['filesize'] ?? null) && $m >= 0
+                ? ' (' . Measure::memory($m) . ')'
                 : ''
         );
         $data['Num edges'] = $profile->calls->count();
diff --git a/src/Sender/Console/Renderer/Smtp.php b/src/Sender/Console/Renderer/Smtp.php
index 1b426431..e89c4ae8 100644
--- a/src/Sender/Console/Renderer/Smtp.php
+++ b/src/Sender/Console/Renderer/Smtp.php
@@ -89,7 +89,7 @@ public function render(OutputInterface $output, Frame $frame): void
                 \array_map(static fn($attach) => [
                     'CID' => $attach->getEmbeddingId(),
                     'Name' => $attach->getClientFilename(),
-                    'Size' => Measure::memory($attach->getSize()),
+                    'Size' => $attach->getSize() === null ? 'unknown size' : Measure::memory($attach->getSize()),
                     'MIME' => $attach->getClientMediaType(),
                 ], $embeddings),
                 'compact',
diff --git a/src/Sender/Console/Support/Files.php b/src/Sender/Console/Support/Files.php
index 255538c8..c66ddb01 100644
--- a/src/Sender/Console/Support/Files.php
+++ b/src/Sender/Console/Support/Files.php
@@ -42,7 +42,7 @@ public static function renderFile(
             : \str_pad(\substr($fileName, $dotPos + 1), 3, ' ', \STR_PAD_BOTH);
 
         // File size
-        $sizeStr = Measure::memory($size) ?? 'unknown size';
+        $sizeStr = $size === null ? 'unknown size' : Measure::memory($size);
 
         // Header with top border
         $output->writeln("<bg=black;fg=magenta> ┌───┐</>  <info>$fileName</info>");
diff --git a/src/Sender/Console/Support/Tables.php b/src/Sender/Console/Support/Tables.php
index d15b3cd9..ae0ad2af 100644
--- a/src/Sender/Console/Support/Tables.php
+++ b/src/Sender/Console/Support/Tables.php
@@ -44,7 +44,7 @@ public static function renderKeyValueTable(OutputInterface $output, string $titl
     }
 
     /**
-     * @param array<array-key, array<array-key, scalar>> $data
+     * @param array<array-key, array<array-key, scalar|null>> $data
      * @param 'default'|'borderless'|'compact'|'symfony-style-guide'|'box'|'box-double' $style
      */
     public static function renderMultiColumnTable(
diff --git a/src/Sender/Frontend/Event.php b/src/Sender/Frontend/Event.php
index bd2f68ea..87f9cc65 100644
--- a/src/Sender/Frontend/Event.php
+++ b/src/Sender/Frontend/Event.php
@@ -14,7 +14,7 @@ final class Event implements \JsonSerializable
     /**
      * @param non-empty-string $uuid
      * @param non-empty-string $type
-     * @param \ArrayAccess<non-empty-string, Asset>|null $assets
+     * @param \ArrayAccess<non-empty-string, Asset>&\Traversable<non-empty-string, Asset>|null $assets
      */
     public function __construct(
         public readonly string $uuid,
diff --git a/src/Sender/Frontend/Mapper/HttpRequest.php b/src/Sender/Frontend/Mapper/HttpRequest.php
index 0fbf6742..8e25a678 100644
--- a/src/Sender/Frontend/Mapper/HttpRequest.php
+++ b/src/Sender/Frontend/Mapper/HttpRequest.php
@@ -19,7 +19,7 @@ public function map(HttpFrame $frame): Event
         $request = $frame->request;
 
         $uri = \ltrim($request->getUri()->getPath(), '/');
-        /** @var \ArrayAccess<non-empty-string, Event\Asset> $assets */
+        /** @var \ArrayObject<non-empty-string, Event\Asset> $assets */
         $assets = new \ArrayObject();
 
         return new Event(
diff --git a/src/Sender/Frontend/Mapper/Smtp.php b/src/Sender/Frontend/Mapper/Smtp.php
index 11dd9273..2b6ece70 100644
--- a/src/Sender/Frontend/Mapper/Smtp.php
+++ b/src/Sender/Frontend/Mapper/Smtp.php
@@ -51,11 +51,11 @@ private static function assetLink(string $uuid, Event\Asset $asset): string
     }
 
     /**
-     * @return \ArrayAccess<non-empty-string, Event\Asset>
+     * @return \ArrayObject<non-empty-string, Event\Asset>
      */
-    private static function fetchAssets(SmtpMessage $message): \ArrayAccess
+    private static function fetchAssets(SmtpMessage $message): \ArrayObject
     {
-        /** @var \ArrayAccess<non-empty-string, Event\Asset> $assets */
+        /** @var \ArrayObject<non-empty-string, Event\Asset> $assets */
         $assets = new \ArrayObject();
 
         foreach ($message->getAttachments() as $attachment) {
@@ -83,9 +83,9 @@ private static function asset(File $attachment): Event\Asset
 
     /**
      * @param non-empty-string $uuid
-     * @param \ArrayAccess<non-empty-string, Event\Asset> $assets
+     * @param \ArrayAccess<non-empty-string, Event\Asset>&\Traversable<non-empty-string, Event\Asset> $assets
      */
-    private static function html(string $uuid, SmtpMessage $message, \ArrayAccess $assets): string
+    private static function html(string $uuid, SmtpMessage $message, \ArrayAccess&\Traversable $assets): string
     {
         $result = $message->getMessage(MessageFormat::Html)?->getValue() ?? '';
 
diff --git a/src/Sender/Frontend/Service.php b/src/Sender/Frontend/Service.php
index ba41cccb..90a57f83 100644
--- a/src/Sender/Frontend/Service.php
+++ b/src/Sender/Frontend/Service.php
@@ -76,7 +76,7 @@ public function smtpAttachments(string $uuid): Attachments|Success
         }
 
         $attaches = [];
-        foreach ($event->assets as $attachment) {
+        foreach ($event->assets ?? [] as $attachment) {
             $attachment instanceof AttachedFile and $attaches[] = $attachment;
         }
 
diff --git a/src/Support/Measure.php b/src/Support/Measure.php
index 6077ada5..e7363870 100644
--- a/src/Support/Measure.php
+++ b/src/Support/Measure.php
@@ -11,15 +11,11 @@
 final class Measure
 {
     /**
-     * @param int<0, max>|null $size
-     * @return non-empty-string|null
+     * @param int<0, max> $size
+     * @return non-empty-string
      */
-    public static function memory(?int $size): ?string
+    public static function memory(int $size): string
     {
-        if ($size === null) {
-            return null;
-        }
-
         $units = ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB'];
         $power = (int) \floor(\log($size, 1024));
         $float = $power > 0 ? \round($size / (1024 ** $power), 2) : $size;
diff --git a/src/Support/Stream/Base64DecodeFilter.php b/src/Support/Stream/Base64DecodeFilter.php
index 2a660533..3d8cd3ec 100644
--- a/src/Support/Stream/Base64DecodeFilter.php
+++ b/src/Support/Stream/Base64DecodeFilter.php
@@ -5,8 +5,11 @@
 namespace Buggregator\Trap\Support\Stream;
 
 /**
+ * @psalm-suppress all
+ *
  * @internal
  * @psalm-internal Buggregator\Trap
+ *
  * @link https://www.php.net/manual/function.stream-filter-register.php
  */
 final class Base64DecodeFilter extends \php_user_filter
@@ -15,12 +18,18 @@ final class Base64DecodeFilter extends \php_user_filter
 
     private string $buffer = '';
 
+    /**
+     * @param resource $in
+     * @param resource $out
+     * @param int<0, max> $consumed
+     */
     public function filter($in, $out, &$consumed, bool $closing): int
     {
         // Buffer size
         $bs = \strlen($this->buffer);
 
         while ($bucket = \stream_bucket_make_writeable($in)) {
+            /** @var int<1, max> $len */
             $len = $bs + $bucket->datalen;
             $d = $len % 4;
 
@@ -43,7 +52,7 @@ public function filter($in, $out, &$consumed, bool $closing): int
             }
 
             // Decode part of the data
-            $bucket->data = \base64_decode($this->buffer . \substr($bucket->data, 0, -$d), true);
+            $bucket->data = \base64_decode($this->buffer . \substr($bucket->data, 0, -$d));
             $consumed += $bucket->datalen;
             $this->buffer = \substr($bucket->data, -$d);
 
diff --git a/src/Support/StreamHelper.php b/src/Support/StreamHelper.php
index d7c99559..07f80626 100644
--- a/src/Support/StreamHelper.php
+++ b/src/Support/StreamHelper.php
@@ -131,21 +131,25 @@ public static function unzipBody(ServerRequestInterface $request): ServerRequest
     /**
      * @param array<non-empty-string|int, mixed> $readFilters filter name => filter options
      * @param array<non-empty-string|int, mixed> $writeFilters filter name => filter options
+     *
+     * @psalm-suppress UnusedFunctionCall
      */
     public static function createFileStream(array $readFilters = [], array $writeFilters = []): StreamInterface
     {
         $stream = \fopen('php://temp/maxmemory:' . self::MAX_FILE_MEMORY_SIZE, 'w+b');
 
+        /** @var mixed $options */
         foreach ($readFilters as $filter => $options) {
             \is_string($filter)
                 ? \stream_filter_append($stream, $filter, \STREAM_FILTER_READ, $options)
-                : \stream_filter_append($stream, $options, \STREAM_FILTER_READ);
+                : \stream_filter_append($stream, (string) $options, \STREAM_FILTER_READ);
         }
 
+        /** @var mixed $options */
         foreach ($writeFilters as $filter => $options) {
             \is_string($filter)
                 ? \stream_filter_append($stream, $filter, \STREAM_FILTER_WRITE, $options)
-                : \stream_filter_append($stream, $options, \STREAM_FILTER_WRITE);
+                : \stream_filter_append($stream, (string) $options, \STREAM_FILTER_WRITE);
         }
 
         return Stream::create($stream);
diff --git a/src/Traffic/Message/Multipart/File.php b/src/Traffic/Message/Multipart/File.php
index 64538495..4d866731 100644
--- a/src/Traffic/Message/Multipart/File.php
+++ b/src/Traffic/Message/Multipart/File.php
@@ -115,7 +115,7 @@ public function getClientFilename(): ?string
 
     public function getClientMediaType(): ?string
     {
-        return \explode(';', $this->getHeader('Content-Type')[0], 2)[0] ?? null;
+        return \explode(';', $this->getHeader('Content-Type')[0] ?? '', 2)[0] ?? null;
     }
 
     public function isEmbedded(): bool