diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 0f67e590..45d5f59a 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -12,6 +12,178 @@ env:
   RUSTC_WRAPPER: sccache
 
 jobs:
+  pipeline-validation:
+    name: Pipeline Validation
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Free disk space
+        uses: jlumbroso/free-disk-space@main
+        with:
+          tool-cache: false
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: false
+          docker-images: true
+          swap-storage: false
+
+      - uses: actions/checkout@v5
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "1.3.5"
+
+      - name: Build UI
+        working-directory: ./ui
+        run: |
+          bun install --frozen-lockfile
+          bun run build
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: "1.92.0"
+
+      - uses: mozilla-actions/sccache-action@v0.0.9
+
+      - uses: Swatinem/rust-cache@v2
+
+      - name: Install system dependencies
+        run: sudo apt-get update && sudo apt-get install -y libvpx-dev nasm cmake ninja-build yasm meson ffmpeg
+
+      - name: Build and install SVT-AV1 from source (v4.1.0)
+        run: |
+          cd /tmp
+          git clone --depth 1 --branch v4.1.0 https://gitlab.com/AOMediaCodec/SVT-AV1.git
+          cd SVT-AV1
+          cmake -S . -B build -G Ninja \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DCMAKE_INSTALL_PREFIX=/usr/local
+          cmake --build build -j"$(nproc)"
+          sudo cmake --install build
+          sudo ldconfig
+
+      - name: Build skit
+        run: cargo build -p streamkit-server --bin skit --features "svt_av1 dav1d_static"
+
+      - name: Start skit server
+        run: |
+          SK_SERVER__ADDRESS=127.0.0.1:4545 ./target/debug/skit &
+          # Wait for the server to be healthy
+          HEALTHY=0
+          for i in $(seq 1 30); do
+            if curl -sf http://127.0.0.1:4545/healthz > /dev/null 2>&1; then
+              echo "skit is healthy"
+              HEALTHY=1
+              break
+            fi
+            sleep 1
+          done
+          if [ "$HEALTHY" -ne 1 ]; then
+            echo "ERROR: skit did not become healthy within 30s"
+            exit 1
+          fi
+
+      - name: Run pipeline validation tests (SW codecs only)
+        run: |
+          cd tests/pipeline-validation
+          PIPELINE_TEST_URL=http://127.0.0.1:4545 cargo test --test validate
+
+  pipeline-validation-gpu:
+    name: Pipeline Validation (GPU)
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
+    runs-on: self-hosted
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "1.3.5"
+
+      - name: Build UI
+        working-directory: ./ui
+        run: |
+          bun install --frozen-lockfile
+          bun run build
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: "1.92.0"
+
+      - uses: mozilla-actions/sccache-action@v0.0.9
+
+      - uses: Swatinem/rust-cache@v2
+
+      - name: Install system dependencies
+        run: sudo apt-get update && sudo apt-get install -y libvpx-dev nasm cmake ninja-build yasm meson ffmpeg libopus-dev pkg-config libssl-dev
+
+      - name: Build and install SVT-AV1 from source (v4.1.0)
+        run: |
+          cd /tmp
+          if pkg-config --atleast-version=2.0.0 SvtAv1Enc 2>/dev/null; then
+            echo "SVT-AV1 already installed, skipping build"
+          else
+            rm -rf SVT-AV1
+            git clone --depth 1 --branch v4.1.0 https://gitlab.com/AOMediaCodec/SVT-AV1.git
+            cd SVT-AV1
+            cmake -S . -B build -G Ninja \
+              -DCMAKE_BUILD_TYPE=Release \
+              -DCMAKE_INSTALL_PREFIX=/usr/local
+            cmake --build build -j"$(nproc)"
+            sudo cmake --install build
+            sudo ldconfig
+          fi
+
+      - name: Build skit (with GPU + HW codecs + SVT-AV1 + dav1d)
+        env:
+          VPX_LIB_DIR: /usr/lib/x86_64-linux-gnu
+          VPX_INCLUDE_DIR: /usr/include
+          VPX_VERSION: "1.13.0"
+          CUDA_INCLUDE_PATH: /usr/include
+          # bindgen (used by shiguredo_nvcodec) needs the clang builtin include
+          # path so it can find stddef.h and other compiler-provided headers.
+          BINDGEN_EXTRA_CLANG_ARGS: "-I/usr/lib/llvm-18/lib/clang/18/include"
+        run: |
+          cargo build -p streamkit-server --bin skit --features "gpu nvcodec vulkan_video svt_av1 dav1d_static"
+
+      - name: Start skit server
+        run: |
+          # Use a non-default port to avoid conflicts with any persistent skit
+          # instance that may be running on the self-hosted runner.
+          SKIT_PORT=4546
+          SK_SERVER__ADDRESS=127.0.0.1:${SKIT_PORT} ./target/debug/skit &
+          echo $! > /tmp/skit-gpu.pid
+          # Wait for the server to be healthy
+          HEALTHY=0
+          for i in $(seq 1 30); do
+            if curl -sf http://127.0.0.1:${SKIT_PORT}/healthz > /dev/null 2>&1; then
+              echo "skit is healthy on port ${SKIT_PORT}"
+              HEALTHY=1
+              break
+            fi
+            sleep 1
+          done
+          if [ "$HEALTHY" -ne 1 ]; then
+            echo "ERROR: skit did not become healthy within 30s"
+            exit 1
+          fi
+
+      - name: Run pipeline validation tests (all codecs including GPU)
+        run: |
+          cd tests/pipeline-validation
+          PIPELINE_TEST_URL=http://127.0.0.1:4546 cargo test --test validate
+
+      - name: Stop skit server
+        if: always()
+        run: |
+          if [ -f /tmp/skit-gpu.pid ]; then
+            kill "$(cat /tmp/skit-gpu.pid)" 2>/dev/null || true
+            rm -f /tmp/skit-gpu.pid
+          fi
+
   e2e:
     name: Playwright E2E
     runs-on: ubuntu-22.04
diff --git a/.github/workflows/marketplace-release.yml b/.github/workflows/marketplace-release.yml
index ef6ff7d5..8bd11c55 100644
--- a/.github/workflows/marketplace-release.yml
+++ b/.github/workflows/marketplace-release.yml
@@ -97,6 +97,7 @@ jobs:
                   '--target', os.environ.get('GITHUB_SHA', 'HEAD'),
                   '--title', release_name,
                   '--notes', f'Plugin bundle for {name} v{version}.',
+                  '--latest=false',
                   bundle,
               ]
               if is_prerelease:
diff --git a/dist/registry/index.json b/dist/registry/index.json
index eb3c6b41..0095f84e 100644
--- a/dist/registry/index.json
+++ b/dist/registry/index.json
@@ -95,6 +95,20 @@
         }
       ]
     },
+    {
+      "id": "parakeet",
+      "name": "Parakeet TDT",
+      "description": "Fast speech-to-text using NVIDIA Parakeet TDT via sherpa-onnx",
+      "latest": "0.1.0",
+      "versions": [
+        {
+          "version": "0.1.0",
+          "manifest_url": "https://streamkit.dev/registry/plugins/parakeet/0.1.0/manifest.json",
+          "signature_url": "https://streamkit.dev/registry/plugins/parakeet/0.1.0/manifest.minisig",
+          "published_at": "2026-04-10"
+        }
+      ]
+    },
     {
       "id": "piper",
       "name": "Piper",
diff --git a/dist/registry/plugins/parakeet/0.1.0/manifest.json b/dist/registry/plugins/parakeet/0.1.0/manifest.json
new file mode 100644
index 00000000..64111cfb
--- /dev/null
+++ b/dist/registry/plugins/parakeet/0.1.0/manifest.json
@@ -0,0 +1,57 @@
+{
+  "schema_version": 1,
+  "id": "parakeet",
+  "name": "Parakeet TDT",
+  "version": "0.1.0",
+  "node_kind": "parakeet",
+  "kind": "native",
+  "description": "Fast speech-to-text using NVIDIA Parakeet TDT via sherpa-onnx",
+  "license": "MPL-2.0",
+  "homepage": "https://huggingface.co/nvidia/parakeet-tdt-0.6b-v2",
+  "entrypoint": "libparakeet.so",
+  "bundle": {
+    "url": "https://github.com/streamer45/streamkit/releases/download/plugin-parakeet-v0.1.0/parakeet-0.1.0-bundle.tar.zst",
+    "sha256": "9ca3cd97ba3c665517dd1319f8492c15b6b97549231577b640bbbc0f71aa60c3",
+    "size_bytes": 15635462
+  },
+  "models": [
+    {
+      "id": "parakeet-tdt-0.6b-v2-int8",
+      "name": "Parakeet TDT 0.6B v2 (English, INT8)",
+      "default": true,
+      "source": "huggingface",
+      "repo_id": "streamkit/parakeet-models",
+      "revision": "main",
+      "files": [
+        "encoder.int8.onnx",
+        "decoder.int8.onnx",
+        "joiner.int8.onnx",
+        "tokens.txt"
+      ],
+      "expected_size_bytes": 661190513,
+      "license": "CC-BY-4.0",
+      "license_url": "https://huggingface.co/nvidia/parakeet-tdt-0.6b-v2",
+      "file_checksums": {
+        "encoder.int8.onnx": "a32b12d17bbbc309d0686fbbcc2987b5e9b8333a7da83fa6b089f0a2acd651ab",
+        "decoder.int8.onnx": "b6bb64963457237b900e496ee9994b59294526439fbcc1fecf705b31a15c6b4e",
+        "joiner.int8.onnx": "7946164367946e7f9f29a122407c3252b680dbae9a51343eb2488d057c3c43d2",
+        "tokens.txt": "ec182b70dd42113aff6c5372c75cac58c952443eb22322f57bbd7f53977d497d"
+      }
+    },
+    {
+      "id": "silero-vad",
+      "name": "Silero VAD (v6.2)",
+      "default": true,
+      "source": "huggingface",
+      "repo_id": "streamkit/parakeet-models",
+      "revision": "main",
+      "files": [
+        "silero_vad.onnx"
+      ],
+      "expected_size_bytes": 2327524,
+      "license": "MIT",
+      "license_url": "https://github.com/snakers4/silero-vad/blob/master/LICENSE",
+      "sha256": "1a153a22f4509e292a94e67d6f9b85e8deb25b4988682b7e174c65279d8788e3"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/dist/registry/plugins/parakeet/0.1.0/manifest.minisig b/dist/registry/plugins/parakeet/0.1.0/manifest.minisig
new file mode 100644
index 00000000..17252b4c
--- /dev/null
+++ b/dist/registry/plugins/parakeet/0.1.0/manifest.minisig
@@ -0,0 +1,4 @@
+untrusted comment: signature from minisign secret key
+RUQ/85JEqYXEgb3NHkk8EDvKfvijFiOhUMrmR97Tqb5NEYf3kTZTK+U5IHo10l0lOfInZaLjscG7wQ6OqfgO6gaRAnqlUzMXmgo=
+trusted comment: timestamp:1775850398	file:manifest.json	hashed
+BMn5YTOa/ekLGbyRUiXr5cnwpYr8NrU+bQrKORovVYFIUtYDDwUyzvELqGjs/tShSlT8Ws7UVtBDdSVdJlOxAg==
diff --git a/docs/public/registry/index.json b/docs/public/registry/index.json
index eb3c6b41..0095f84e 100644
--- a/docs/public/registry/index.json
+++ b/docs/public/registry/index.json
@@ -95,6 +95,20 @@
         }
       ]
     },
+    {
+      "id": "parakeet",
+      "name": "Parakeet TDT",
+      "description": "Fast speech-to-text using NVIDIA Parakeet TDT via sherpa-onnx",
+      "latest": "0.1.0",
+      "versions": [
+        {
+          "version": "0.1.0",
+          "manifest_url": "https://streamkit.dev/registry/plugins/parakeet/0.1.0/manifest.json",
+          "signature_url": "https://streamkit.dev/registry/plugins/parakeet/0.1.0/manifest.minisig",
+          "published_at": "2026-04-10"
+        }
+      ]
+    },
     {
       "id": "piper",
       "name": "Piper",
diff --git a/docs/public/registry/plugins/parakeet/0.1.0/manifest.json b/docs/public/registry/plugins/parakeet/0.1.0/manifest.json
new file mode 100644
index 00000000..64111cfb
--- /dev/null
+++ b/docs/public/registry/plugins/parakeet/0.1.0/manifest.json
@@ -0,0 +1,57 @@
+{
+  "schema_version": 1,
+  "id": "parakeet",
+  "name": "Parakeet TDT",
+  "version": "0.1.0",
+  "node_kind": "parakeet",
+  "kind": "native",
+  "description": "Fast speech-to-text using NVIDIA Parakeet TDT via sherpa-onnx",
+  "license": "MPL-2.0",
+  "homepage": "https://huggingface.co/nvidia/parakeet-tdt-0.6b-v2",
+  "entrypoint": "libparakeet.so",
+  "bundle": {
+    "url": "https://github.com/streamer45/streamkit/releases/download/plugin-parakeet-v0.1.0/parakeet-0.1.0-bundle.tar.zst",
+    "sha256": "9ca3cd97ba3c665517dd1319f8492c15b6b97549231577b640bbbc0f71aa60c3",
+    "size_bytes": 15635462
+  },
+  "models": [
+    {
+      "id": "parakeet-tdt-0.6b-v2-int8",
+      "name": "Parakeet TDT 0.6B v2 (English, INT8)",
+      "default": true,
+      "source": "huggingface",
+      "repo_id": "streamkit/parakeet-models",
+      "revision": "main",
+      "files": [
+        "encoder.int8.onnx",
+        "decoder.int8.onnx",
+        "joiner.int8.onnx",
+        "tokens.txt"
+      ],
+      "expected_size_bytes": 661190513,
+      "license": "CC-BY-4.0",
+      "license_url": "https://huggingface.co/nvidia/parakeet-tdt-0.6b-v2",
+      "file_checksums": {
+        "encoder.int8.onnx": "a32b12d17bbbc309d0686fbbcc2987b5e9b8333a7da83fa6b089f0a2acd651ab",
+        "decoder.int8.onnx": "b6bb64963457237b900e496ee9994b59294526439fbcc1fecf705b31a15c6b4e",
+        "joiner.int8.onnx": "7946164367946e7f9f29a122407c3252b680dbae9a51343eb2488d057c3c43d2",
+        "tokens.txt": "ec182b70dd42113aff6c5372c75cac58c952443eb22322f57bbd7f53977d497d"
+      }
+    },
+    {
+      "id": "silero-vad",
+      "name": "Silero VAD (v6.2)",
+      "default": true,
+      "source": "huggingface",
+      "repo_id": "streamkit/parakeet-models",
+      "revision": "main",
+      "files": [
+        "silero_vad.onnx"
+      ],
+      "expected_size_bytes": 2327524,
+      "license": "MIT",
+      "license_url": "https://github.com/snakers4/silero-vad/blob/master/LICENSE",
+      "sha256": "1a153a22f4509e292a94e67d6f9b85e8deb25b4988682b7e174c65279d8788e3"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/docs/public/registry/plugins/parakeet/0.1.0/manifest.minisig b/docs/public/registry/plugins/parakeet/0.1.0/manifest.minisig
new file mode 100644
index 00000000..17252b4c
--- /dev/null
+++ b/docs/public/registry/plugins/parakeet/0.1.0/manifest.minisig
@@ -0,0 +1,4 @@
+untrusted comment: signature from minisign secret key
+RUQ/85JEqYXEgb3NHkk8EDvKfvijFiOhUMrmR97Tqb5NEYf3kTZTK+U5IHo10l0lOfInZaLjscG7wQ6OqfgO6gaRAnqlUzMXmgo=
+trusted comment: timestamp:1775850398	file:manifest.json	hashed
+BMn5YTOa/ekLGbyRUiXr5cnwpYr8NrU+bQrKORovVYFIUtYDDwUyzvELqGjs/tShSlT8Ws7UVtBDdSVdJlOxAg==
diff --git a/justfile b/justfile
index 967f9ba6..380929bf 100644
--- a/justfile
+++ b/justfile
@@ -1389,6 +1389,18 @@ e2e-external url filter='':
     @echo "Running E2E tests against {{url}}..."
     @cd e2e && E2E_BASE_URL={{url}} bun run test:only {{ if filter != "" { "--grep '" + filter + "'" } else { "" } }}
 
+# Run headless pipeline validation tests (no browser required).
+# Requires a running skit server — pass its URL as an argument.
+# Each .yml in samples/pipelines/test/ becomes a test case; a companion
+# .toml sidecar declares the expected ffprobe output.
+#
+# Usage:
+#   just test-pipelines http://localhost:4545
+#   just test-pipelines http://localhost:4545 vp9   # filter by name
+test-pipelines url filter='':
+    @echo "Running headless pipeline validation tests against {{url}}..."
+    @cd tests/pipeline-validation && PIPELINE_TEST_URL={{url}} cargo test --test validate {{ if filter != "" { "-- " + filter } else { "" } }}
+
 # Show E2E test report
 [working-directory: 'e2e']
 e2e-report:
diff --git a/samples/pipelines/test/dav1d_roundtrip/expected.toml b/samples/pipelines/test/dav1d_roundtrip/expected.toml
new file mode 100644
index 00000000..dcb94a18
--- /dev/null
+++ b/samples/pipelines/test/dav1d_roundtrip/expected.toml
@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+requires_node = "video::dav1d::decoder"
+output_extension = ".webm"
+codec_name = "av1"
+width = 320
+height = 240
+container_format = "matroska,webm"
+pix_fmt = "yuv420p"
diff --git a/samples/pipelines/test/dav1d_roundtrip/pipeline.yml b/samples/pipelines/test/dav1d_roundtrip/pipeline.yml
new file mode 100644
index 00000000..ae3db3e9
--- /dev/null
+++ b/samples/pipelines/test/dav1d_roundtrip/pipeline.yml
@@ -0,0 +1,66 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: SVT-AV1 encode → dav1d decode → SVT-AV1 re-encode roundtrip.
+# Exercises: colorbars → svt_av1 encoder → dav1d decoder → svt_av1 re-encoder → webm muxer
+# Used by headless pipeline validation tests.
+#
+# Requires: skit built with --features "svt_av1 dav1d"
+
+name: Test — dav1d AV1 Decode Roundtrip
+description: AV1 roundtrip via SVT-AV1 encode → dav1d decode → SVT-AV1 re-encode
+mode: oneshot
+client:
+  input:
+    type: none
+  output:
+    type: video
+
+nodes:
+  colorbars:
+    kind: video::colorbars
+    params:
+      width: 320
+      height: 240
+      fps: 30
+      frame_count: 30
+      pixel_format: nv12
+      draw_time: true
+      draw_time_use_pts: true
+
+  svt_av1_encoder:
+    kind: video::svt_av1::encoder
+    params:
+      preset: 12
+      low_latency: true
+    needs: colorbars
+
+  dav1d_decoder:
+    kind: video::dav1d::decoder
+    needs: svt_av1_encoder
+
+  svt_av1_reencoder:
+    kind: video::svt_av1::encoder
+    params:
+      preset: 12
+      low_latency: true
+    needs: dav1d_decoder
+
+  webm_muxer:
+    kind: containers::webm::muxer
+    params:
+      video_width: 320
+      video_height: 240
+      streaming_mode: live
+    needs: svt_av1_reencoder
+
+  pacer:
+    kind: core::pacer
+    needs: webm_muxer
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'video/webm; codecs="av1"'
+    needs: pacer
diff --git a/samples/pipelines/test/fixtures/test_tone.ogg b/samples/pipelines/test/fixtures/test_tone.ogg
new file mode 100644
index 00000000..818f8521
Binary files /dev/null and b/samples/pipelines/test/fixtures/test_tone.ogg differ
diff --git a/samples/pipelines/test/fixtures/test_tone.ogg.license b/samples/pipelines/test/fixtures/test_tone.ogg.license
new file mode 100644
index 00000000..45469f0a
--- /dev/null
+++ b/samples/pipelines/test/fixtures/test_tone.ogg.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+
+SPDX-License-Identifier: CC0-1.0
diff --git a/samples/pipelines/test/nv_av1_colorbars/expected.toml b/samples/pipelines/test/nv_av1_colorbars/expected.toml
new file mode 100644
index 00000000..287d611d
--- /dev/null
+++ b/samples/pipelines/test/nv_av1_colorbars/expected.toml
@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Expected output metadata for nv_av1_colorbars.yml
+# Requires: skit built with --features nvcodec + NVIDIA GPU
+
+requires_node = "video::nv::av1_encoder"
+output_extension = ".webm"
+codec_name = "av1"
+width = 320
+height = 240
+container_format = "matroska,webm"
+pix_fmt = "yuv420p"
diff --git a/samples/pipelines/test/nv_av1_colorbars/pipeline.yml b/samples/pipelines/test/nv_av1_colorbars/pipeline.yml
new file mode 100644
index 00000000..053654b8
--- /dev/null
+++ b/samples/pipelines/test/nv_av1_colorbars/pipeline.yml
@@ -0,0 +1,55 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: NVENC AV1/WebM colorbars (30 frames = 1 second at 30fps).
+# Used by headless pipeline validation tests.
+#
+# Requires: skit built with --features nvcodec
+#           NVIDIA GPU with NVENC AV1 support (Ada Lovelace / RTX 40+)
+
+name: Test — NVENC AV1 Color Bars
+description: Short NVENC AV1/WebM colorbars for automated testing
+mode: oneshot
+client:
+  input:
+    type: none
+  output:
+    type: video
+
+nodes:
+  colorbars:
+    kind: video::colorbars
+    params:
+      width: 320
+      height: 240
+      fps: 30
+      frame_count: 30
+      pixel_format: nv12
+      draw_time: true
+      draw_time_use_pts: true
+
+  nv_av1_encoder:
+    kind: video::nv::av1_encoder
+    params:
+      bitrate: 1000000
+      framerate: 30
+    needs: colorbars
+
+  webm_muxer:
+    kind: containers::webm::muxer
+    params:
+      video_width: 320
+      video_height: 240
+      streaming_mode: live
+    needs: nv_av1_encoder
+
+  pacer:
+    kind: core::pacer
+    needs: webm_muxer
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'video/webm; codecs="av1"'
+    needs: pacer
diff --git a/samples/pipelines/test/openh264_colorbars/expected.toml b/samples/pipelines/test/openh264_colorbars/expected.toml
new file mode 100644
index 00000000..21388536
--- /dev/null
+++ b/samples/pipelines/test/openh264_colorbars/expected.toml
@@ -0,0 +1,12 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Expected output metadata for openh264_colorbars.yml
+
+output_extension = ".mp4"
+codec_name = "h264"
+width = 320
+height = 240
+container_format = "mov,mp4,m4a,3gp,3g2,mj2"
+pix_fmt = "yuv420p"
diff --git a/samples/pipelines/test/openh264_colorbars/pipeline.yml b/samples/pipelines/test/openh264_colorbars/pipeline.yml
new file mode 100644
index 00000000..e42618cc
--- /dev/null
+++ b/samples/pipelines/test/openh264_colorbars/pipeline.yml
@@ -0,0 +1,48 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: OpenH264/MP4 colorbars (30 frames = 1 second at 30fps).
+# Used by headless pipeline validation tests.
+
+name: Test — OpenH264 Color Bars
+description: Short H.264/MP4 colorbars for automated testing
+mode: oneshot
+client:
+  input:
+    type: none
+  output:
+    type: video
+
+nodes:
+  colorbars:
+    kind: video::colorbars
+    params:
+      width: 320
+      height: 240
+      fps: 30
+      frame_count: 30
+      pixel_format: nv12
+      draw_time: true
+      draw_time_use_pts: true
+
+  h264_encoder:
+    kind: video::openh264::encoder
+    params:
+      bitrate_kbps: 1000
+      max_frame_rate: 30.0
+    needs: colorbars
+
+  mp4_muxer:
+    kind: containers::mp4::muxer
+    params:
+      mode: stream
+      video_width: 320
+      video_height: 240
+    needs: h264_encoder
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'video/mp4; codecs="avc1.42c01f"'
+    needs: mp4_muxer
diff --git a/samples/pipelines/test/opus_mp4/expected.toml b/samples/pipelines/test/opus_mp4/expected.toml
new file mode 100644
index 00000000..81badb0e
--- /dev/null
+++ b/samples/pipelines/test/opus_mp4/expected.toml
@@ -0,0 +1,10 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+output_extension = ".mp4"
+container_format = "mov,mp4,m4a,3gp,3g2,mj2"
+audio_codec = "opus"
+sample_rate = 48000
+channels = 1
+input_file = "../fixtures/test_tone.ogg"
diff --git a/samples/pipelines/test/opus_mp4/pipeline.yml b/samples/pipelines/test/opus_mp4/pipeline.yml
new file mode 100644
index 00000000..0ce01cd3
--- /dev/null
+++ b/samples/pipelines/test/opus_mp4/pipeline.yml
@@ -0,0 +1,47 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: Opus in MP4 container.
+# Exercises: ogg demuxer → opus decoder → opus encoder → mp4 muxer (file mode)
+# Used by headless pipeline validation tests.
+
+name: Test — Opus in MP4
+description: Decodes uploaded Ogg/Opus, re-encodes to Opus, muxes into MP4
+mode: oneshot
+client:
+  input:
+    type: file_upload
+    accept: "audio/opus"
+  output:
+    type: audio
+
+nodes:
+  http_input:
+    kind: streamkit::http_input
+
+  ogg_demuxer:
+    kind: containers::ogg::demuxer
+    needs: http_input
+
+  opus_decoder:
+    kind: audio::opus::decoder
+    needs: ogg_demuxer
+
+  opus_encoder:
+    kind: audio::opus::encoder
+    needs: opus_decoder
+
+  mp4_muxer:
+    kind: containers::mp4::muxer
+    params:
+      mode: file
+      sample_rate: 48000
+      channels: 1
+    needs: opus_encoder
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'audio/mp4; codecs="opus"'
+    needs: mp4_muxer
diff --git a/samples/pipelines/test/opus_roundtrip/expected.toml b/samples/pipelines/test/opus_roundtrip/expected.toml
new file mode 100644
index 00000000..b4c40adc
--- /dev/null
+++ b/samples/pipelines/test/opus_roundtrip/expected.toml
@@ -0,0 +1,10 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+output_extension = ".ogg"
+container_format = "ogg"
+audio_codec = "opus"
+sample_rate = 48000
+channels = 1
+input_file = "../fixtures/test_tone.ogg"
diff --git a/samples/pipelines/test/opus_roundtrip/pipeline.yml b/samples/pipelines/test/opus_roundtrip/pipeline.yml
new file mode 100644
index 00000000..0419fa3a
--- /dev/null
+++ b/samples/pipelines/test/opus_roundtrip/pipeline.yml
@@ -0,0 +1,44 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: Opus encode/decode roundtrip via Ogg container.
+# Exercises: ogg demuxer → opus decoder → opus encoder → ogg muxer
+# Used by headless pipeline validation tests.
+
+name: Test — Opus Roundtrip (Ogg)
+description: Decodes uploaded Ogg/Opus, re-encodes to Opus, muxes into Ogg
+mode: oneshot
+client:
+  input:
+    type: file_upload
+    accept: "audio/opus"
+  output:
+    type: audio
+
+nodes:
+  http_input:
+    kind: streamkit::http_input
+
+  ogg_demuxer:
+    kind: containers::ogg::demuxer
+    needs: http_input
+
+  opus_decoder:
+    kind: audio::opus::decoder
+    needs: ogg_demuxer
+
+  opus_encoder:
+    kind: audio::opus::encoder
+    needs: opus_decoder
+
+  ogg_muxer:
+    kind: containers::ogg::muxer
+    params:
+      channels: 1
+      chunk_size: 65536
+    needs: opus_encoder
+
+  http_output:
+    kind: streamkit::http_output
+    needs: ogg_muxer
diff --git a/samples/pipelines/test/rav1e_colorbars/expected.toml b/samples/pipelines/test/rav1e_colorbars/expected.toml
new file mode 100644
index 00000000..04fc7cb1
--- /dev/null
+++ b/samples/pipelines/test/rav1e_colorbars/expected.toml
@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+requires_node = "video::av1::encoder"
+output_extension = ".webm"
+codec_name = "av1"
+width = 320
+height = 240
+container_format = "matroska,webm"
+pix_fmt = "yuv420p"
diff --git a/samples/pipelines/test/rav1e_colorbars/pipeline.yml b/samples/pipelines/test/rav1e_colorbars/pipeline.yml
new file mode 100644
index 00000000..df1fa0da
--- /dev/null
+++ b/samples/pipelines/test/rav1e_colorbars/pipeline.yml
@@ -0,0 +1,53 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: rav1e AV1 encoder → WebM (30 frames = 1 second at 30fps).
+# Exercises: colorbars → video::av1::encoder (rav1e, pure-Rust) → webm muxer
+# Used by headless pipeline validation tests.
+
+name: Test — rav1e AV1 Color Bars
+description: Short rav1e AV1/WebM colorbars for automated testing
+mode: oneshot
+client:
+  input:
+    type: none
+  output:
+    type: video
+
+nodes:
+  colorbars:
+    kind: video::colorbars
+    params:
+      width: 320
+      height: 240
+      fps: 30
+      frame_count: 30
+      pixel_format: nv12
+      draw_time: true
+      draw_time_use_pts: true
+
+  av1_encoder:
+    kind: video::av1::encoder
+    params:
+      speed: 10
+      low_latency: true
+    needs: colorbars
+
+  webm_muxer:
+    kind: containers::webm::muxer
+    params:
+      video_width: 320
+      video_height: 240
+      streaming_mode: live
+    needs: av1_encoder
+
+  pacer:
+    kind: core::pacer
+    needs: webm_muxer
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'video/webm; codecs="av1"'
+    needs: pacer
diff --git a/samples/pipelines/test/svt_av1_colorbars/expected.toml b/samples/pipelines/test/svt_av1_colorbars/expected.toml
new file mode 100644
index 00000000..afaa3247
--- /dev/null
+++ b/samples/pipelines/test/svt_av1_colorbars/expected.toml
@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+requires_node = "video::svt_av1::encoder"
+output_extension = ".webm"
+codec_name = "av1"
+width = 320
+height = 240
+container_format = "matroska,webm"
+pix_fmt = "yuv420p"
diff --git a/samples/pipelines/test/svt_av1_colorbars/pipeline.yml b/samples/pipelines/test/svt_av1_colorbars/pipeline.yml
new file mode 100644
index 00000000..0004467e
--- /dev/null
+++ b/samples/pipelines/test/svt_av1_colorbars/pipeline.yml
@@ -0,0 +1,54 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: SVT-AV1/WebM colorbars (30 frames = 1 second at 30fps).
+# Used by headless pipeline validation tests.
+#
+# Requires: skit built with --features svt_av1
+
+name: Test — SVT-AV1 Color Bars
+description: Short SVT-AV1/WebM colorbars for automated testing
+mode: oneshot
+client:
+  input:
+    type: none
+  output:
+    type: video
+
+nodes:
+  colorbars:
+    kind: video::colorbars
+    params:
+      width: 320
+      height: 240
+      fps: 30
+      frame_count: 30
+      pixel_format: nv12
+      draw_time: true
+      draw_time_use_pts: true
+
+  svt_av1_encoder:
+    kind: video::svt_av1::encoder
+    params:
+      preset: 12
+      low_latency: true
+    needs: colorbars
+
+  webm_muxer:
+    kind: containers::webm::muxer
+    params:
+      video_width: 320
+      video_height: 240
+      streaming_mode: live
+    needs: svt_av1_encoder
+
+  pacer:
+    kind: core::pacer
+    needs: webm_muxer
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'video/webm; codecs="av1"'
+    needs: pacer
diff --git a/samples/pipelines/test/vp9_colorbars/expected.toml b/samples/pipelines/test/vp9_colorbars/expected.toml
new file mode 100644
index 00000000..2df03262
--- /dev/null
+++ b/samples/pipelines/test/vp9_colorbars/expected.toml
@@ -0,0 +1,12 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Expected output metadata for vp9_colorbars.yml
+
+output_extension = ".webm"
+codec_name = "vp9"
+width = 320
+height = 240
+container_format = "matroska,webm"
+pix_fmt = "yuv420p"
diff --git a/samples/pipelines/test/vp9_colorbars/pipeline.yml b/samples/pipelines/test/vp9_colorbars/pipeline.yml
new file mode 100644
index 00000000..582d8d94
--- /dev/null
+++ b/samples/pipelines/test/vp9_colorbars/pipeline.yml
@@ -0,0 +1,49 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: VP9/WebM colorbars (30 frames = 1 second at 30fps).
+# Used by headless pipeline validation tests.
+
+name: Test — VP9 Color Bars
+description: Short VP9/WebM colorbars for automated testing
+mode: oneshot
+client:
+  input:
+    type: none
+  output:
+    type: video
+
+nodes:
+  colorbars:
+    kind: video::colorbars
+    params:
+      width: 320
+      height: 240
+      fps: 30
+      frame_count: 30
+      pixel_format: nv12
+      draw_time: true
+      draw_time_use_pts: true
+
+  vp9_encoder:
+    kind: video::vp9::encoder
+    needs: colorbars
+
+  webm_muxer:
+    kind: containers::webm::muxer
+    params:
+      video_width: 320
+      video_height: 240
+      streaming_mode: live
+    needs: vp9_encoder
+
+  pacer:
+    kind: core::pacer
+    needs: webm_muxer
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'video/webm; codecs="vp9"'
+    needs: pacer
diff --git a/samples/pipelines/test/vp9_roundtrip/expected.toml b/samples/pipelines/test/vp9_roundtrip/expected.toml
new file mode 100644
index 00000000..b8322c5a
--- /dev/null
+++ b/samples/pipelines/test/vp9_roundtrip/expected.toml
@@ -0,0 +1,10 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+output_extension = ".webm"
+codec_name = "vp9"
+width = 320
+height = 240
+container_format = "matroska,webm"
+pix_fmt = "yuv420p"
diff --git a/samples/pipelines/test/vp9_roundtrip/pipeline.yml b/samples/pipelines/test/vp9_roundtrip/pipeline.yml
new file mode 100644
index 00000000..062d1804
--- /dev/null
+++ b/samples/pipelines/test/vp9_roundtrip/pipeline.yml
@@ -0,0 +1,58 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: VP9 encode → decode → re-encode roundtrip (30 frames).
+# Exercises: colorbars → vp9 encoder → vp9 decoder → vp9 re-encoder → webm muxer
+# Used by headless pipeline validation tests.
+
+name: Test — VP9 Encode/Decode Roundtrip
+description: VP9 roundtrip via encode → decode → re-encode
+mode: oneshot
+client:
+  input:
+    type: none
+  output:
+    type: video
+
+nodes:
+  colorbars:
+    kind: video::colorbars
+    params:
+      width: 320
+      height: 240
+      fps: 30
+      frame_count: 30
+      pixel_format: nv12
+      draw_time: true
+      draw_time_use_pts: true
+
+  vp9_encoder:
+    kind: video::vp9::encoder
+    needs: colorbars
+
+  vp9_decoder:
+    kind: video::vp9::decoder
+    needs: vp9_encoder
+
+  vp9_reencoder:
+    kind: video::vp9::encoder
+    needs: vp9_decoder
+
+  webm_muxer:
+    kind: containers::webm::muxer
+    params:
+      video_width: 320
+      video_height: 240
+      streaming_mode: live
+    needs: vp9_reencoder
+
+  pacer:
+    kind: core::pacer
+    needs: webm_muxer
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'video/webm; codecs="vp9"'
+    needs: pacer
diff --git a/samples/pipelines/test/vulkan_video_h264_colorbars/expected.toml b/samples/pipelines/test/vulkan_video_h264_colorbars/expected.toml
new file mode 100644
index 00000000..21b048d1
--- /dev/null
+++ b/samples/pipelines/test/vulkan_video_h264_colorbars/expected.toml
@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Expected output metadata for vulkan_video_h264_colorbars.yml
+# Requires: skit built with --features vulkan_video + Vulkan-capable GPU
+
+requires_node = "video::vulkan_video::h264_encoder"
+output_extension = ".mp4"
+codec_name = "h264"
+width = 320
+height = 240
+container_format = "mov,mp4,m4a,3gp,3g2,mj2"
+pix_fmt = "yuv420p"
diff --git a/samples/pipelines/test/vulkan_video_h264_colorbars/pipeline.yml b/samples/pipelines/test/vulkan_video_h264_colorbars/pipeline.yml
new file mode 100644
index 00000000..46491815
--- /dev/null
+++ b/samples/pipelines/test/vulkan_video_h264_colorbars/pipeline.yml
@@ -0,0 +1,51 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+# Test pipeline: Vulkan Video H.264/MP4 colorbars (30 frames = 1 second at 30fps).
+# Used by headless pipeline validation tests.
+#
+# Requires: skit built with --features vulkan_video
+#           Vulkan-capable GPU with H.264 encode support
+
+name: Test — Vulkan Video H.264 Color Bars
+description: Short Vulkan Video H.264/MP4 colorbars for automated testing
+mode: oneshot
+client:
+  input:
+    type: none
+  output:
+    type: video
+
+nodes:
+  colorbars:
+    kind: video::colorbars
+    params:
+      width: 320
+      height: 240
+      fps: 30
+      frame_count: 30
+      pixel_format: nv12
+      draw_time: true
+      draw_time_use_pts: true
+
+  vk_h264_encoder:
+    kind: video::vulkan_video::h264_encoder
+    params:
+      bitrate: 1000000
+      framerate: 30
+    needs: colorbars
+
+  mp4_muxer:
+    kind: containers::mp4::muxer
+    params:
+      mode: stream
+      video_width: 320
+      video_height: 240
+    needs: vk_h264_encoder
+
+  http_output:
+    kind: streamkit::http_output
+    params:
+      content_type: 'video/mp4; codecs="avc1.42c01f"'
+    needs: mp4_muxer
diff --git a/tests/pipeline-validation/Cargo.lock b/tests/pipeline-validation/Cargo.lock
new file mode 100644
index 00000000..d9d09f1a
--- /dev/null
+++ b/tests/pipeline-validation/Cargo.lock
@@ -0,0 +1,1978 @@
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+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11532158c46691caf0f2593ea8358fed6bbf68a0315e80aae9bd41fbade684a1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b97154e67e32c85465826e8bcc1c59429aaaf107c1e4a9e53c8d8ccd5eff88d0"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f9152d31db0792fa83f70fb2f83148effb5c1f5b8c7686c3459e361d9bc20bf"
+dependencies = [
+ "displaydoc",
+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.11.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90f911cbc359ab6af17377d242225f4d75119aec87ea711a880987b18cd7b239"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "625dc425cab0dca6dc3c3319506e6593dcb08a9f387ea3b284dbd52a92c40555"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "zmij"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
diff --git a/tests/pipeline-validation/Cargo.toml b/tests/pipeline-validation/Cargo.toml
new file mode 100644
index 00000000..26f57935
--- /dev/null
+++ b/tests/pipeline-validation/Cargo.toml
@@ -0,0 +1,30 @@
+# SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+#
+# SPDX-License-Identifier: MPL-2.0
+
+[package]
+name = "pipeline-validation"
+version = "0.1.0"
+edition = "2021"
+publish = false
+description = "Headless pipeline validation tests for StreamKit"
+
+# No library crate — this package only contains integration tests.
+[lib]
+name = "pipeline_validation"
+path = "src/lib.rs"
+
+[[test]]
+name = "validate"
+path = "tests/validate.rs"
+harness = false
+
+[dependencies]
+ffprobe = "0.4"
+reqwest = { version = "0.12", features = ["blocking", "multipart", "json"] }
+serde = { version = "1", features = ["derive"] }
+toml = "0.8"
+tempfile = "3"
+
+[dev-dependencies]
+datatest-stable = "0.3.3"
diff --git a/tests/pipeline-validation/src/lib.rs b/tests/pipeline-validation/src/lib.rs
new file mode 100644
index 00000000..2d307789
--- /dev/null
+++ b/tests/pipeline-validation/src/lib.rs
@@ -0,0 +1,300 @@
+// SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+//
+// SPDX-License-Identifier: MPL-2.0
+
+//! Headless pipeline validation helpers for StreamKit.
+//!
+//! This crate provides utilities for running oneshot pipelines against a live
+//! `skit` server, capturing the output, and validating it with `ffprobe`.
+//! No browser required.
+//!
+//! # Architecture
+//!
+//! Each test case is defined by a pair of files in `samples/pipelines/test/`:
+//!
+//! - `<name>.yml` — the pipeline YAML to POST to `/api/v1/process`
+//! - `<name>.toml` — expected output metadata (codec, resolution, container)
+//!
+//! The test harness discovers all `.yml` files, loads the companion `.toml`,
+//! runs the pipeline, and validates the output with `ffprobe`.
+
+use std::collections::HashSet;
+use std::io::Write;
+use std::path::Path;
+
+use serde::Deserialize;
+
+/// Expected output metadata for a pipeline test case.
+///
+/// Lives in a `.toml` sidecar file alongside each test pipeline YAML.
+#[derive(Debug, Deserialize)]
+pub struct Expected {
+    /// File extension for the output (e.g. ".webm", ".mp4", ".ogg").
+    pub output_extension: String,
+
+    /// Expected container format name from ffprobe (e.g. "matroska,webm", "mov,mp4,m4a,3gp,3g2,mj2").
+    pub container_format: String,
+
+    /// Optional: node kind that must be registered in the server for this test
+    /// to run. If the node is missing, the test is skipped (returns Ok).
+    pub requires_node: Option<String>,
+
+    // --- Video expectations (optional — omit for audio-only tests) ---
+
+    /// Expected video codec name as reported by ffprobe (e.g. "vp9", "h264", "av1").
+    pub codec_name: Option<String>,
+
+    /// Expected video width in pixels.
+    pub width: Option<u32>,
+
+    /// Expected video height in pixels.
+    pub height: Option<u32>,
+
+    /// Optional: expected pixel format (e.g. "yuv420p").
+    pub pix_fmt: Option<String>,
+
+    // --- Audio expectations (optional — omit for video-only tests) ---
+
+    /// Expected audio codec name as reported by ffprobe (e.g. "opus", "mp3", "flac").
+    pub audio_codec: Option<String>,
+
+    /// Expected audio sample rate in Hz (e.g. 48000).
+    pub sample_rate: Option<u32>,
+
+    /// Expected number of audio channels (e.g. 2).
+    pub channels: Option<u32>,
+
+    // --- Input file (optional — for pipelines that accept file uploads) ---
+
+    /// Relative path (from the test directory) to an input file to upload.
+    /// If set, the pipeline will be run with a file upload instead of no input.
+    pub input_file: Option<String>,
+}
+
+/// Get the base URL for the skit server from environment.
+///
+/// Checks `PIPELINE_TEST_URL` first, then `E2E_BASE_URL`, and defaults to
+/// `http://127.0.0.1:4545`.
+pub fn get_base_url() -> String {
+    std::env::var("PIPELINE_TEST_URL")
+        .or_else(|_| std::env::var("E2E_BASE_URL"))
+        .unwrap_or_else(|_| "http://127.0.0.1:4545".to_string())
+}
+
+/// Query the server's node schema endpoint to discover which node kinds are
+/// registered. Returns a set of node kind strings.
+///
+/// This is used to skip tests for HW codecs that aren't compiled into the
+/// running server binary (e.g. `video::nv::av1_encoder`).
+pub fn get_available_nodes(base_url: &str) -> Result<HashSet<String>, String> {
+    let url = format!("{base_url}/api/v1/schema/nodes");
+    let response = reqwest::blocking::get(&url)
+        .map_err(|e| format!("Failed to query node schema at {url}: {e}"))?;
+
+    if !response.status().is_success() {
+        return Err(format!(
+            "Node schema request failed with status {}",
+            response.status()
+        ));
+    }
+
+    #[derive(Deserialize)]
+    struct NodeInfo {
+        kind: String,
+    }
+
+    let nodes: Vec<NodeInfo> = response
+        .json()
+        .map_err(|e| format!("Failed to parse node schema JSON: {e}"))?;
+
+    Ok(nodes.into_iter().map(|n| n.kind).collect())
+}
+
+/// Run a oneshot pipeline against the skit server.
+///
+/// Posts the pipeline YAML as a multipart form to `/api/v1/process` and
+/// saves the streamed response body to a temporary file.
+///
+/// If `input_file` is `Some`, the file is attached as the `media` part of the
+/// multipart form (for pipelines that expect `client.input.type: file_upload`).
+///
+/// Returns the path to the output file on success.
+pub fn run_pipeline(
+    base_url: &str,
+    yaml_contents: &str,
+    output_extension: &str,
+    input_file: Option<&Path>,
+) -> Result<tempfile::NamedTempFile, String> {
+    let url = format!("{base_url}/api/v1/process");
+
+    let mut form = reqwest::blocking::multipart::Form::new()
+        .text("config", yaml_contents.to_string());
+
+    // Attach the input file if provided.
+    if let Some(path) = input_file {
+        let file_bytes = std::fs::read(path)
+            .map_err(|e| format!("Failed to read input file {}: {e}", path.display()))?;
+        let file_name = path
+            .file_name()
+            .and_then(|n| n.to_str())
+            .unwrap_or("input")
+            .to_string();
+        let part = reqwest::blocking::multipart::Part::bytes(file_bytes)
+            .file_name(file_name);
+        form = form.part("media", part);
+    }
+
+    let client = reqwest::blocking::Client::builder()
+        .timeout(std::time::Duration::from_secs(120))
+        .build()
+        .map_err(|e| format!("Failed to create HTTP client: {e}"))?;
+
+    let response = client
+        .post(&url)
+        .multipart(form)
+        .send()
+        .map_err(|e| format!("Pipeline request to {url} failed: {e}"))?;
+
+    if !response.status().is_success() {
+        let status = response.status();
+        let body = response
+            .text()
+            .unwrap_or_else(|_| "<unreadable>".to_string());
+        return Err(format!("Pipeline returned {status}: {body}"));
+    }
+
+    // Stream response to a temp file.
+    let mut tmp = tempfile::Builder::new()
+        .suffix(output_extension)
+        .tempfile()
+        .map_err(|e| format!("Failed to create temp file: {e}"))?;
+
+    let bytes = response
+        .bytes()
+        .map_err(|e| format!("Failed to read response body: {e}"))?;
+
+    tmp.write_all(&bytes)
+        .map_err(|e| format!("Failed to write output to temp file: {e}"))?;
+
+    tmp.flush()
+        .map_err(|e| format!("Failed to flush temp file: {e}"))?;
+
+    Ok(tmp)
+}
+
+/// Validate a pipeline's output file against the expected metadata.
+///
+/// Runs `ffprobe` against the output file and checks codec, resolution,
+/// container format, and audio properties against the [`Expected`] values.
+pub fn validate_output(output_path: &Path, expected: &Expected) -> Result<(), String> {
+    let probe = ffprobe::ffprobe(output_path)
+        .map_err(|e| format!("ffprobe failed on {}: {e}", output_path.display()))?;
+
+    // Check container format.
+    let format_name = &probe.format.format_name;
+    if !format_name.contains(&expected.container_format)
+        && !expected.container_format.contains(format_name.as_str())
+    {
+        return Err(format!(
+            "Container mismatch: expected format containing '{}', got '{}'",
+            expected.container_format, format_name
+        ));
+    }
+
+    // --- Video validation (if video expectations are set) ---
+    if let Some(ref expected_codec) = expected.codec_name {
+        let video = probe
+            .streams
+            .iter()
+            .find(|s| s.codec_type.as_deref() == Some("video"))
+            .ok_or("No video stream found in output (expected video codec)")?;
+
+        let codec_name = video.codec_name.as_deref().unwrap_or("<unknown>");
+        if codec_name != expected_codec.as_str() {
+            return Err(format!(
+                "Video codec mismatch: expected '{}', got '{}'",
+                expected_codec, codec_name
+            ));
+        }
+
+        if let Some(expected_w) = expected.width {
+            let width = video.width.unwrap_or(0) as u32;
+            if width != expected_w {
+                return Err(format!(
+                    "Video width mismatch: expected {expected_w}, got {width}"
+                ));
+            }
+        }
+
+        if let Some(expected_h) = expected.height {
+            let height = video.height.unwrap_or(0) as u32;
+            if height != expected_h {
+                return Err(format!(
+                    "Video height mismatch: expected {expected_h}, got {height}"
+                ));
+            }
+        }
+
+        if let Some(ref expected_pix_fmt) = expected.pix_fmt {
+            let pix_fmt = video.pix_fmt.as_deref().unwrap_or("<unknown>");
+            if pix_fmt != expected_pix_fmt.as_str() {
+                return Err(format!(
+                    "Pixel format mismatch: expected '{}', got '{}'",
+                    expected_pix_fmt, pix_fmt
+                ));
+            }
+        }
+    }
+
+    // --- Audio validation (if audio expectations are set) ---
+    if let Some(ref expected_audio_codec) = expected.audio_codec {
+        let audio = probe
+            .streams
+            .iter()
+            .find(|s| s.codec_type.as_deref() == Some("audio"))
+            .ok_or("No audio stream found in output (expected audio codec)")?;
+
+        let codec_name = audio.codec_name.as_deref().unwrap_or("<unknown>");
+        if codec_name != expected_audio_codec.as_str() {
+            return Err(format!(
+                "Audio codec mismatch: expected '{}', got '{}'",
+                expected_audio_codec, codec_name
+            ));
+        }
+
+        if let Some(expected_sr) = expected.sample_rate {
+            // ffprobe reports sample_rate as a string in the stream.
+            let actual_sr = audio
+                .sample_rate
+                .as_deref()
+                .and_then(|s| s.parse::<u32>().ok())
+                .unwrap_or(0);
+            if actual_sr != expected_sr {
+                return Err(format!(
+                    "Sample rate mismatch: expected {expected_sr}, got {actual_sr}"
+                ));
+            }
+        }
+
+        if let Some(expected_ch) = expected.channels {
+            let actual_ch = audio.channels.unwrap_or(0) as u32;
+            if actual_ch != expected_ch {
+                return Err(format!(
+                    "Channel count mismatch: expected {expected_ch}, got {actual_ch}"
+                ));
+            }
+        }
+    }
+
+    // Ensure at least one stream type was validated.
+    if expected.codec_name.is_none() && expected.audio_codec.is_none() {
+        return Err(
+            "Expected TOML must specify at least one of 'codec_name' (video) or 'audio_codec' (audio)"
+                .to_string(),
+        );
+    }
+
+    Ok(())
+}
+
+
diff --git a/tests/pipeline-validation/tests/validate.rs b/tests/pipeline-validation/tests/validate.rs
new file mode 100644
index 00000000..82f1f12d
--- /dev/null
+++ b/tests/pipeline-validation/tests/validate.rs
@@ -0,0 +1,112 @@
+// SPDX-FileCopyrightText: © 2025 StreamKit Contributors
+//
+// SPDX-License-Identifier: MPL-2.0
+
+//! Headless pipeline validation test harness.
+//!
+//! Discovers all `pipeline.yml` files under `samples/pipelines/test/<name>/`,
+//! loads the sibling `expected.toml`, runs the pipeline against a live `skit`
+//! server, and validates the output with `ffprobe`.
+//!
+//! # Usage
+//!
+//! ```bash
+//! # Start skit, then run tests:
+//! PIPELINE_TEST_URL=http://127.0.0.1:4545 \
+//!   cargo test --manifest-path tests/pipeline-validation/Cargo.toml
+//!
+//! # Or via justfile:
+//! just test-pipelines http://127.0.0.1:4545
+//! ```
+
+#![allow(clippy::disallowed_macros)] // Test binary — no logging crate available.
+
+use std::collections::HashSet;
+use std::path::Path;
+use std::sync::OnceLock;
+
+use pipeline_validation::{
+    get_available_nodes, get_base_url, run_pipeline, validate_output, Expected,
+};
+
+/// Lazily resolved base URL for the skit server.
+fn base_url() -> &'static str {
+    static URL: OnceLock<String> = OnceLock::new();
+    URL.get_or_init(get_base_url)
+}
+
+/// Lazily resolved set of available node kinds on the server.
+fn available_nodes() -> &'static HashSet<String> {
+    static NODES: OnceLock<HashSet<String>> = OnceLock::new();
+    NODES.get_or_init(|| {
+        get_available_nodes(base_url()).unwrap_or_else(|err| {
+            eprintln!("WARNING: Could not query available nodes: {err}");
+            eprintln!("  HW codec tests will be skipped.");
+            eprintln!("  Is skit running at {}?", base_url());
+            HashSet::new()
+        })
+    })
+}
+
+/// The main test function called by `datatest-stable` for each `pipeline.yml`.
+///
+/// For each test directory it:
+/// 1. Loads the sibling `expected.toml`
+/// 2. Checks if the required node kind is available (skips if not)
+/// 3. POSTs the pipeline to the server
+/// 4. Saves the response to a temp file
+/// 5. Validates the output with `ffprobe`
+fn validate_pipeline(path: &Path, yaml: String) -> datatest_stable::Result<()> {
+    // Load sibling expectations file from the same directory.
+    let test_dir = path.parent().expect("pipeline.yml must be inside a test directory");
+    let expected_path = test_dir.join("expected.toml");
+    let expected_toml = std::fs::read_to_string(&expected_path).map_err(|e| {
+        format!(
+            "Missing expectations file '{}': {e}\n\
+             Each test pipeline YAML needs a companion .toml with expected output metadata.",
+            expected_path.display()
+        )
+    })?;
+
+    let expected: Expected = toml::from_str(&expected_toml).map_err(|e| {
+        format!(
+            "Invalid expectations file '{}': {e}",
+            expected_path.display()
+        )
+    })?;
+
+    // Check if the required node is available (skip gracefully if not).
+    if let Some(ref required) = expected.requires_node {
+        if !available_nodes().contains(required.as_str()) {
+            eprintln!(
+                "SKIP: '{}' requires node '{}' which is not available on this server",
+                path.display(),
+                required
+            );
+            return Ok(());
+        }
+    }
+
+    let test_name = test_dir
+        .file_name()
+        .map(|n| n.to_string_lossy().to_string())
+        .unwrap_or_default();
+
+    // Resolve the input file path (if any) relative to the test directory.
+    let input_file = expected.input_file.as_ref().map(|rel| test_dir.join(rel));
+    let input_ref = input_file.as_deref();
+
+    // Run the pipeline.
+    let output = run_pipeline(base_url(), &yaml, &expected.output_extension, input_ref)
+        .map_err(|e| format!("Pipeline '{test_name}' failed: {e}"))?;
+
+    // Validate with ffprobe.
+    validate_output(output.path(), &expected)
+        .map_err(|e| format!("Validation failed for '{test_name}': {e}"))?;
+
+    Ok(())
+}
+
+datatest_stable::harness! {
+    { test = validate_pipeline, root = "../../samples/pipelines/test", pattern = r"pipeline\.yml$" },
+}