diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 234e171ec..386a5fa9a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
         with:
           components: rustfmt
 
@@ -35,12 +35,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
         with:
           components: clippy
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
@@ -83,13 +83,13 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
 
       - name: Install cargo-nextest
-        uses: taiki-e/install-action@nextest
+        uses: taiki-e/install-action@4dc1969decfa71b34f25aa7f3dd4656654d9ad1e # nextest
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
@@ -132,10 +132,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
@@ -159,15 +159,15 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
         with:
           components: clippy
 
       - name: Install cargo-nextest
-        uses: taiki-e/install-action@nextest
+        uses: taiki-e/install-action@4dc1969decfa71b34f25aa7f3dd4656654d9ad1e # nextest
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
@@ -235,12 +235,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
         with:
           components: clippy
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
@@ -342,7 +342,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: taiki-e/install-action@v2
+      - uses: taiki-e/install-action@3f74d7c16a4242f1c95561e98edc25d36adb4375 # v2
         with:
           tool: cargo-deny, cargo-audit
 
diff --git a/.github/workflows/llama-cuda-blackwell.yml b/.github/workflows/llama-cuda-blackwell.yml
index 561cf3c75..66f168c7c 100644
--- a/.github/workflows/llama-cuda-blackwell.yml
+++ b/.github/workflows/llama-cuda-blackwell.yml
@@ -31,10 +31,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Check out llama.cpp
         uses: actions/checkout@v4
@@ -92,10 +92,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       # The gateway's default features build the config UI with esbuild.
       - uses: actions/setup-node@v4
@@ -155,7 +155,7 @@ jobs:
         run: cp llama-server-cuda-blackwell-*.zip.sha256 SHA256SUMS
 
       - name: Publish the release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@3bb12739c298aeb8a4eeaf626c5b8d85266b0e65 # v2
         with:
           tag_name: llama-cuda-blackwell-${{ env.TAG }}
           name: llama-cuda-blackwell-${{ env.TAG }}
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 0b48d917c..f0630308c 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -59,8 +59,8 @@ jobs:
       ARTIFACT: gateway-nightly-${{ needs.check.outputs.date }}-${{ needs.check.outputs.short-sha }}-linux-x64
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
+      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
       - uses: actions/setup-node@v4
@@ -92,8 +92,8 @@ jobs:
       ARTIFACT: gateway-nightly-${{ needs.check.outputs.date }}-${{ needs.check.outputs.short-sha }}-linux-arm64
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
+      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
       - uses: actions/setup-node@v4
@@ -149,8 +149,8 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
+      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
 
@@ -209,7 +209,7 @@ jobs:
           cp "$src" "crates/workshop/binaries/promptforge-gateway-$triple$ext"
 
       - name: Build the app
-        uses: tauri-apps/tauri-action@v0
+        uses: tauri-apps/tauri-action@84b9d35b5fc46c1e45415bdb6144030364f7ebc5 # v0
         with:
           projectPath: crates/workshop
           args: ${{ matrix.args }} --config tauri.nightly.conf.json
diff --git a/.github/workflows/promptforge-gateway-v-release.yml b/.github/workflows/promptforge-gateway-v-release.yml
index db8840cff..496f2ce5c 100644
--- a/.github/workflows/promptforge-gateway-v-release.yml
+++ b/.github/workflows/promptforge-gateway-v-release.yml
@@ -14,8 +14,12 @@
 # title/body based on your changelogs.
 
 name: Release
+# HAND-EDIT (re-apply after `cargo dist generate`): default the token to
+# read-only. This workflow triggers on pull_request, where a write token is
+# never needed; the plan, host, and announce jobs grant contents: write
+# themselves.
 permissions:
-  "contents": "write"
+  "contents": "read"
 
 # This task will run whenever you push a git tag that looks like a version
 # like "1.0.0", "v0.1.0-prerelease.1", "my-app/0.1.0", "releases/v1.0.0", etc.
@@ -48,6 +52,8 @@ jobs:
   # Run 'dist plan' (or host) to determine what tasks we need to do
   plan:
     runs-on: "ubuntu-22.04"
+    permissions:
+      "contents": "write"
     outputs:
       val: ${{ steps.plan.outputs.manifest }}
       tag: ${{ !github.event.pull_request && github.ref_name || '' }}
@@ -55,6 +61,10 @@ jobs:
       publishing: ${{ !github.event.pull_request }}
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      # HAND-EDIT (re-apply after `cargo dist generate`): the subcommand
+      # travels through the environment so github.ref_name is never
+      # interpolated into the run command.
+      DIST_PLAN_COMMAND: ${{ (!github.event.pull_request && format('host --steps=create --tag={0}', github.ref_name)) || 'plan' }}
     steps:
       - uses: actions/checkout@v6
         with:
@@ -77,7 +87,8 @@ jobs:
       # but also really annoying to build CI around when it needs secrets to work right.)
       - id: plan
         run: |
-          dist ${{ (!github.event.pull_request && format('host --steps=create --tag={0}', github.ref_name)) || 'plan' }} --output-format=json > plan-dist-manifest.json
+          # Intentionally unquoted: the env var carries the argument list.
+          dist $DIST_PLAN_COMMAND --output-format=json > plan-dist-manifest.json
           echo "dist ran successfully"
           cat plan-dist-manifest.json
           echo "manifest=$(jq -c "." plan-dist-manifest.json)" >> "$GITHUB_OUTPUT"
@@ -227,6 +238,8 @@ jobs:
       - build-global-artifacts
     # Only run if we're "publishing", and only if plan, local and global didn't fail (skipped is fine)
     if: ${{ always() && needs.plan.result == 'success' && needs.plan.outputs.publishing == 'true' && (needs.build-global-artifacts.result == 'skipped' || needs.build-global-artifacts.result == 'success') && (needs.build-local-artifacts.result == 'skipped' || needs.build-local-artifacts.result == 'success') }}
+    permissions:
+      "contents": "write"
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     runs-on: "ubuntu-22.04"
@@ -288,6 +301,8 @@ jobs:
     # HAND-EDIT (re-apply after `cargo dist generate`): also require the
     # release-test gate, so a failed test means no release is created.
     if: ${{ always() && needs.host.result == 'success' && needs.custom-gateway-release-test.result == 'success' }}
+    permissions:
+      "contents": "write"
     runs-on: "ubuntu-22.04"
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/release-workshop.yml b/.github/workflows/release-workshop.yml
index c392a6849..8b1b1a09d 100644
--- a/.github/workflows/release-workshop.yml
+++ b/.github/workflows/release-workshop.yml
@@ -99,10 +99,10 @@ jobs:
           [ "$actual" = "$expected" ] || { echo "checkout $actual does not match execution SHA $expected"; exit 1; }
           echo "Execution SHA: $actual"
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Add the Rust target
         if: matrix.name == 'macos-arm' || matrix.name == 'macos-intel'
@@ -177,7 +177,7 @@ jobs:
       - name: Build the signed release app
         if: github.event_name == 'push'
         id: release-build
-        uses: tauri-apps/tauri-action@v0
+        uses: tauri-apps/tauri-action@84b9d35b5fc46c1e45415bdb6144030364f7ebc5 # v0
         env:
           TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
           TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
@@ -188,7 +188,7 @@ jobs:
       - name: Build the unsigned temporary app
         if: github.event_name == 'workflow_dispatch'
         id: temporary-build
-        uses: tauri-apps/tauri-action@v0
+        uses: tauri-apps/tauri-action@84b9d35b5fc46c1e45415bdb6144030364f7ebc5 # v0
         with:
           projectPath: crates/workshop
           args: ${{ matrix.args }} --config tauri.nightly.conf.json
@@ -560,7 +560,7 @@ jobs:
           python3 -m json.tool dist/latest.json
 
       - name: Publish the release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@3bb12739c298aeb8a4eeaf626c5b8d85266b0e65 # v2
         with:
           tag_name: ${{ github.ref_name }}
           name: PromptForge Workshop ${{ github.ref_name }}
diff --git a/.github/workflows/stt-miri.yml b/.github/workflows/stt-miri.yml
index fb402c775..76f34db41 100644
--- a/.github/workflows/stt-miri.yml
+++ b/.github/workflows/stt-miri.yml
@@ -20,13 +20,13 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@nightly
+      - uses: dtolnay/rust-toolchain@be39649afda95dbf70f87cce95f68b8d5797b296 # nightly
         with:
           toolchain: nightly-2026-09-05
           components: miri
 
       - name: Cache Cargo and Miri
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Prepare Miri
         run: cargo +nightly-2026-09-05 miri setup
@@ -44,13 +44,17 @@ jobs:
         run: cargo +nightly-2026-09-05 miri test -p gateway-stt --features test-fixtures miri_
 
   native-whisper:
+    # A self-hosted runner must never execute untrusted code: run this job
+    # on pushes, dispatches, and same-repository PRs only. Fork PRs still
+    # get the Miri jobs, which run on GitHub-hosted runners.
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
     runs-on: [self-hosted, windows, cuda]
     timeout-minutes: 90
     steps:
       - uses: actions/checkout@v4
 
       - name: Cache Cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Provision pinned native fixtures
         shell: powershell
diff --git a/.github/workflows/whisper-lib.yml b/.github/workflows/whisper-lib.yml
index 05117e320..eaffd0fb0 100644
--- a/.github/workflows/whisper-lib.yml
+++ b/.github/workflows/whisper-lib.yml
@@ -87,7 +87,7 @@ jobs:
         if: matrix.platform == 'macos-x86_64'
         run: >-
           cmake -S whisper.cpp -B build
-          -DBUILD_SHARED_LIBS=ON
+          -DBUILD_SHARED_LIBS=OFF
           -DGGML_METAL=OFF
           -DGGML_NATIVE=OFF
           -DWHISPER_BUILD_EXAMPLES=OFF
@@ -239,7 +239,7 @@ jobs:
         run: sha256sum *.zip > SHA256SUMS
 
       - name: Publish the release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@3bb12739c298aeb8a4eeaf626c5b8d85266b0e65 # v2
         with:
           tag_name: whisper-lib-${{ env.WHISPER_TAG }}
           name: whisper-lib-${{ env.WHISPER_TAG }}
diff --git a/.github/workflows/workshop-installer-smoke.yml b/.github/workflows/workshop-installer-smoke.yml
index 0e7b4fdc7..3acd3e952 100644
--- a/.github/workflows/workshop-installer-smoke.yml
+++ b/.github/workflows/workshop-installer-smoke.yml
@@ -21,10 +21,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@6bed0761d98439e5a578e2877258200ad565ba87 # stable
 
       - name: Cache cargo
-        uses: Swatinem/rust-cache@v2
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
       - name: Cache the embedding model
         uses: ./.github/actions/hf-model-cache
@@ -44,7 +44,7 @@ jobs:
         run: node tools/stage-gateway-sidecar.mjs stage --target x86_64-pc-windows-msvc --source target/debug/promptforge-gateway.exe
 
       - name: Compile unsigned debug NSIS installer
-        uses: tauri-apps/tauri-action@v0
+        uses: tauri-apps/tauri-action@84b9d35b5fc46c1e45415bdb6144030364f7ebc5 # v0
         with:
           projectPath: crates/workshop
           args: --debug --bundles nsis --config tauri.nightly.conf.json