diff --git a/packages/pulp/CHANGELOG.md b/packages/pulp/CHANGELOG.md
index 1a9090c..fbb9eaf 100644
--- a/packages/pulp/CHANGELOG.md
+++ b/packages/pulp/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to `mapsight/pulp` are documented here.
 
 ## Unreleased
 
+### Fixed
+
+- Remove the temp file created by `srcHttp` `sink => true` when the last path-backed `File` is released, including clones. A failed request removes it immediately. A caller-supplied sink path is left in place.
+
 ## 1.2.0 - 2026-09-02
 
 ### Added
diff --git a/packages/pulp/Pulp.php b/packages/pulp/Pulp.php
index 0c2dbe1..cf34264 100644
--- a/packages/pulp/Pulp.php
+++ b/packages/pulp/Pulp.php
@@ -60,7 +60,9 @@ public static function srcFile(
     /**
      * ## Options
      * * `sink`: `true` writes the body to a temp file and emits a path-backed
-     *   `File` (use this for large responses). A string path writes there.
+     *   `File` (use this for large responses). The temp file is removed when
+     *   the last `File` that shares it is released, including clones. A string
+     *   path writes there and is left in place.
      *   (default: `null` — load the body as a string)
      * * `client`: Guzzle `Client` instance. Tests inject a mock handler here.
      *   (default: `new Client()`)
diff --git a/packages/pulp/README.md b/packages/pulp/README.md
index a54aba1..a78fec2 100644
--- a/packages/pulp/README.md
+++ b/packages/pulp/README.md
@@ -112,7 +112,7 @@ Pulp::start()
     ->run();
 ```
 
-- `sink => true` writes the body to a temp file and emits a path-backed `File`, so a ~100 MB response does not have to live as a PHP string. Pass a path string to choose the file.
+- `sink => true` writes the body to a temp file and emits a path-backed `File`, so a ~100 MB response does not have to live as a PHP string. The temp file is removed when the last `File` that shares it is released, including clones from `split`, `shadow`, and `results`. Pass a path string to keep the body at a path you manage.
 - `client` injects a Guzzle `Client` (tests use a mock handler).
 - `successStatuses` throws unless the status is in the list. Pair with Guzzle `http_errors => false` when 304/204 are first-class.
 - The file also carries `httpStatus`, `httpLastModified`, `httpEtag`, and `httpType`.
diff --git a/packages/pulp/src/File.php b/packages/pulp/src/File.php
index 378ca55..6e3b03b 100644
--- a/packages/pulp/src/File.php
+++ b/packages/pulp/src/File.php
@@ -18,6 +18,11 @@ class File
     private array $___data = [];
     private ?string $___contentPath = null;
 
+    /**
+     * Shared by clones. The path is removed when the last File releases it.
+     */
+    private ?SharedTempPath $___tempPath = null;
+
     /**
      * File constructor.
      */
@@ -26,7 +31,11 @@ public function __construct(public $fileName, ?string $srcFileName = null)
         $this->srcFileName = empty($srcFileName) ? $this->fileName : $srcFileName;
     }
 
-    public static function fromPath(string $path, ?string $fileName = null): File
+    /**
+     * @param bool $unlinkOnDestruct Remove `$path` when the last File that shares
+     *        it is released, including clones. Caller-supplied paths stay.
+     */
+    public static function fromPath(string $path, ?string $fileName = null, bool $unlinkOnDestruct = false): File
     {
         $file = new File(
             $fileName ?: $path,
@@ -38,6 +47,9 @@ public static function fromPath(string $path, ?string $fileName = null): File
         }
 
         $file->___contentPath = $path;
+        if ($unlinkOnDestruct) {
+            $file->___tempPath = new SharedTempPath($path);
+        }
 
         $stats = @stat($path);
         if ($stats !== false) {
diff --git a/packages/pulp/src/SharedTempPath.php b/packages/pulp/src/SharedTempPath.php
new file mode 100644
index 0000000..63507f3
--- /dev/null
+++ b/packages/pulp/src/SharedTempPath.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenMapsight\pulp;
+
+/**
+ * Deletes a temp path when the last reference is released.
+ *
+ * File clones share one instance, so a shallow clone does not unlink early.
+ */
+final class SharedTempPath
+{
+    public function __construct(private readonly string $path) {}
+
+    public function __destruct()
+    {
+        @unlink($this->path);
+    }
+}
diff --git a/packages/pulp/src/SrcHttpHandler.php b/packages/pulp/src/SrcHttpHandler.php
index 3f9012a..07ab810 100644
--- a/packages/pulp/src/SrcHttpHandler.php
+++ b/packages/pulp/src/SrcHttpHandler.php
@@ -10,6 +10,9 @@
 
 class SrcHttpHandler extends AbstractHandler
 {
+    /** Temp file created for `sink => true`. Null once a File owns it, or after it is removed. */
+    private ?string $ephemeralSinkPath = null;
+
     protected function getConstructorParamDefs(): array
     {
         return ['method', 'uri', 'guzzleOptions', 'aliasFileName', 'options'];
@@ -39,7 +42,13 @@ public function onEnd(): void
             $this->assertSuccessStatus($statusCode);
 
             if ($sinkPath !== null) {
-                $tmpFile = File::fromPath($sinkPath, $this->cp->aliasFileName);
+                $tmpFile = File::fromPath(
+                    $sinkPath,
+                    $this->cp->aliasFileName,
+                    $this->ephemeralSinkPath !== null,
+                );
+                // File removes this on release. A caller-supplied path is not ephemeral.
+                $this->ephemeralSinkPath = null;
             } else {
                 $tmpFile = new File($this->cp->aliasFileName);
                 $tmpFile->content = (string) $res->getBody();
@@ -64,6 +73,8 @@ public function onEnd(): void
             } else {
                 throw $err;
             }
+        } finally {
+            $this->discardEphemeralSink();
         }
 
         if ($file instanceof File) {
@@ -91,6 +102,8 @@ private function resolveSinkPath(): ?string
                 throw new RuntimeException('Unable to create HTTP sink temp file');
             }
 
+            $this->ephemeralSinkPath = $path;
+
             return $path;
         }
         if (is_string($sink) && $sink !== '') {
@@ -102,6 +115,17 @@ private function resolveSinkPath(): ?string
         return is_string($guzzleSink) && $guzzleSink !== '' ? $guzzleSink : null;
     }
 
+    private function discardEphemeralSink(): void
+    {
+        if ($this->ephemeralSinkPath === null) {
+            return;
+        }
+
+        $path = $this->ephemeralSinkPath;
+        $this->ephemeralSinkPath = null;
+        @unlink($path);
+    }
+
     private function assertSuccessStatus(int $statusCode): void
     {
         $allowed = $this->cp->options['successStatuses'] ?? null;
diff --git a/packages/pulp/test/FileTest.php b/packages/pulp/test/FileTest.php
index 6f2b55c..525eb67 100644
--- a/packages/pulp/test/FileTest.php
+++ b/packages/pulp/test/FileTest.php
@@ -77,6 +77,39 @@ public function testStreamReadsFromPathWithoutTouchingContent(): void
         }
     }
 
+    public function testFromPathCanUnlinkWhenReleased(): void
+    {
+        $tmpFile = tempnam(sys_get_temp_dir(), 'pulp-file-test-');
+        $this->assertIsString($tmpFile);
+        file_put_contents($tmpFile, 'owned');
+
+        $f = File::fromPath($tmpFile, 'file.txt', true);
+        $this->assertSame('owned', $f->content);
+        $this->assertFileExists($tmpFile);
+
+        unset($f);
+
+        $this->assertFileDoesNotExist($tmpFile);
+    }
+
+    public function testOwnedPathSurvivesUntilTheLastCloneIsReleased(): void
+    {
+        $tmpFile = tempnam(sys_get_temp_dir(), 'pulp-file-test-');
+        $this->assertIsString($tmpFile);
+        file_put_contents($tmpFile, 'owned');
+
+        $original = File::fromPath($tmpFile, 'file.txt', true);
+        $clone = clone $original;
+
+        unset($original);
+        $this->assertFileExists($tmpFile);
+        $this->assertSame('owned', $clone->content);
+
+        unset($clone);
+
+        $this->assertFileDoesNotExist($tmpFile);
+    }
+
     public function testStreamFromGeneratedContent(): void
     {
         $f = new File('file.txt');
diff --git a/packages/pulp/test/SrcHttpHandlerTest.php b/packages/pulp/test/SrcHttpHandlerTest.php
index 7bfaef7..c4d3eb4 100644
--- a/packages/pulp/test/SrcHttpHandlerTest.php
+++ b/packages/pulp/test/SrcHttpHandlerTest.php
@@ -60,6 +60,124 @@ public function testSinkWritesPathBackedFile(): void
         }
     }
 
+    public function testEphemeralSinkStaysUntilTheFileIsReleased(): void
+    {
+        $result = Pulp::start()
+            ->pipe(Pulp::srcHttp(
+                'GET',
+                'https://example.test/large.json',
+                [],
+                'large.json',
+                [
+                    'client' => $this->client(new Response(200, [], '{"sites":true}')),
+                    'sink' => true,
+                ]
+            ))
+            ->run();
+
+        $path = $result[0]->srcFileName;
+        $this->assertIsString($path);
+        $this->assertMatchesRegularExpression('#/pulp-http-[^/]+$#', $path);
+        $this->assertFileExists($path);
+        $this->assertSame('{"sites":true}', $result[0]->content);
+        $this->assertFileExists($path);
+
+        unset($result);
+        gc_collect_cycles();
+
+        $this->assertFileDoesNotExist($path);
+    }
+
+    public function testEphemeralSinkSurvivesClonesUntilTheLastFileIsReleased(): void
+    {
+        $kept = [];
+        $result = Pulp::start()
+            ->pipe(Pulp::srcHttp(
+                'GET',
+                'https://example.test/large.json',
+                [],
+                'large.json',
+                [
+                    'client' => $this->client(new Response(200, [], '{"sites":true}')),
+                    'sink' => true,
+                ]
+            ))
+            ->pipe(Pulp::results(static function (array $files) use (&$kept): void {
+                $kept = $files;
+            }))
+            ->run();
+
+        $path = $result[0]->srcFileName;
+        $this->assertIsString($path);
+        $this->assertFileExists($path);
+
+        unset($result);
+        gc_collect_cycles();
+
+        $this->assertFileExists($path);
+        $this->assertSame('{"sites":true}', $kept[0]->content);
+        $this->assertFileExists($path);
+
+        unset($kept);
+        gc_collect_cycles();
+
+        $this->assertFileDoesNotExist($path);
+    }
+
+    public function testEphemeralSinkIsRemovedWhenTheRequestFails(): void
+    {
+        $before = $this->ephemeralSinks();
+
+        try {
+            Pulp::start()
+                ->pipe(Pulp::srcHttp(
+                    'GET',
+                    'https://example.test/status',
+                    ['http_errors' => false],
+                    'status.json',
+                    [
+                        'client' => $this->client(new Response(500, [], 'nope')),
+                        'sink' => true,
+                        'successStatuses' => [200],
+                    ]
+                ))
+                ->run();
+            $this->fail('Expected the failed response to throw');
+        } catch (RuntimeException $err) {
+            $this->assertStringContainsString('returned 500', $err->getMessage());
+        }
+
+        $this->assertSame($before, $this->ephemeralSinks());
+    }
+
+    public function testCallerSinkPathIsKeptWhenTheRequestFails(): void
+    {
+        $sink = tempnam(sys_get_temp_dir(), 'pulp-http-sink-');
+        $this->assertIsString($sink);
+
+        try {
+            Pulp::start()
+                ->pipe(Pulp::srcHttp(
+                    'GET',
+                    'https://example.test/status',
+                    ['http_errors' => false],
+                    'status.json',
+                    [
+                        'client' => $this->client(new Response(500, [], 'nope')),
+                        'sink' => $sink,
+                        'successStatuses' => [200],
+                    ]
+                ))
+                ->run();
+            $this->fail('Expected the failed response to throw');
+        } catch (RuntimeException $err) {
+            $this->assertStringContainsString('returned 500', $err->getMessage());
+            $this->assertFileExists($sink);
+        } finally {
+            @unlink($sink);
+        }
+    }
+
     public function testSuccessStatusesRejectUnexpectedCodes(): void
     {
         $this->expectException(RuntimeException::class);
@@ -101,6 +219,16 @@ public function testNotModifiedStillEmitsFileWithStatus(): void
         $this->assertSame('', $result[0]->content);
     }
 
+    /**
+     * @return list<string>
+     */
+    private function ephemeralSinks(): array
+    {
+        $paths = glob(sys_get_temp_dir() . '/pulp-http-*');
+
+        return is_array($paths) ? $paths : [];
+    }
+
     private function client(Response $response): Client
     {
         return new Client([