diff --git a/.github/workflows/cloudflare-main.yml b/.github/workflows/cloudflare-main.yml
index 86ee969..9e038a4 100644
--- a/.github/workflows/cloudflare-main.yml
+++ b/.github/workflows/cloudflare-main.yml
@@ -27,7 +27,7 @@ permissions:
 
 jobs:
   quality:
-    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       quality-policy-path: ${{ inputs.quality-policy-path }}
       deployment-policy-path: ${{ inputs.deployment-policy-path }}
@@ -46,7 +46,7 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           repository: burnt-labs/github-workflows
-          ref: cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+          ref: ed309eaa57dfea000dfe6f4fbcb3c5c16773cd6e # v1.6.0
           path: .burnt-workflows
       - name: Read stable release tags
         env:
@@ -76,7 +76,7 @@ jobs:
     permissions:
       contents: read
       deployments: write
-    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       # Under single topology the candidate and the release are the same
       # Worker, so deploying here would serve the merge immediately and there
@@ -98,7 +98,7 @@ jobs:
     permissions:
       contents: read
       deployments: write
-    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       operation: preview
       target: release
@@ -184,7 +184,7 @@ jobs:
     permissions:
       contents: read
       deployments: write
-    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       operation: deploy
       target: release
diff --git a/.github/workflows/cloudflare-pr.yml b/.github/workflows/cloudflare-pr.yml
index f5ee200..0cf8a1c 100644
--- a/.github/workflows/cloudflare-pr.yml
+++ b/.github/workflows/cloudflare-pr.yml
@@ -31,7 +31,7 @@ jobs:
       github.event_name != 'pull_request' ||
       (github.event.pull_request.draft == false &&
        github.event.pull_request.head.repo.full_name == github.repository)
-    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       quality-policy-path: ${{ inputs.quality-policy-path }}
       deployment-policy-path: ${{ inputs.deployment-policy-path }}
@@ -62,7 +62,7 @@ jobs:
     permissions:
       contents: read
       deployments: write
-    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       operation: preview
       target: candidate
diff --git a/.github/workflows/cloudflare-release.yml b/.github/workflows/cloudflare-release.yml
index 7611e36..2d8c332 100644
--- a/.github/workflows/cloudflare-release.yml
+++ b/.github/workflows/cloudflare-release.yml
@@ -56,7 +56,7 @@ jobs:
 
   quality:
     needs: validate
-    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       quality-policy-path: ${{ inputs.quality-policy-path }}
       deployment-policy-path: ${{ inputs.deployment-policy-path }}
@@ -89,7 +89,7 @@ jobs:
     permissions:
       contents: read
       deployments: write
-    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       operation: preview
       target: release
@@ -108,7 +108,7 @@ jobs:
     permissions:
       contents: read
       deployments: write
-    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/cloudflare-version.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       operation: deploy
       target: release
diff --git a/.github/workflows/npm-changesets.yml b/.github/workflows/npm-changesets.yml
index cce9bf6..7e77217 100644
--- a/.github/workflows/npm-changesets.yml
+++ b/.github/workflows/npm-changesets.yml
@@ -96,7 +96,7 @@ permissions:
 
 jobs:
   quality:
-    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       quality-policy-path: ${{ inputs.quality-policy-path }}
 
diff --git a/.github/workflows/npm-main.yml b/.github/workflows/npm-main.yml
index 8d4cfce..33ef01d 100644
--- a/.github/workflows/npm-main.yml
+++ b/.github/workflows/npm-main.yml
@@ -8,7 +8,7 @@ permissions:
 
 jobs:
   quality:
-    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
 
   metadata:
     needs: quality
@@ -31,7 +31,7 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           repository: burnt-labs/github-workflows
-          ref: cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+          ref: ed309eaa57dfea000dfe6f4fbcb3c5c16773cd6e # v1.6.0
           path: .burnt-workflows
       - name: Read stable release tags
         env:
@@ -107,7 +107,7 @@ jobs:
     permissions:
       contents: read
       id-token: write
-    uses: burnt-labs/github-workflows/.github/workflows/npm-publish.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/npm-publish.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       quality-policy: ${{ needs.quality.outputs.quality-policy }}
       npm-policy: ${{ needs.quality.outputs.npm-policy }}
@@ -171,7 +171,7 @@ jobs:
     permissions:
       contents: read
       id-token: write
-    uses: burnt-labs/github-workflows/.github/workflows/npm-publish.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/npm-publish.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       quality-policy: ${{ needs.quality.outputs.quality-policy }}
       npm-policy: ${{ needs.quality.outputs.npm-policy }}
diff --git a/.github/workflows/npm-pr.yml b/.github/workflows/npm-pr.yml
index fcb4da2..4456cf4 100644
--- a/.github/workflows/npm-pr.yml
+++ b/.github/workflows/npm-pr.yml
@@ -8,7 +8,7 @@ permissions:
 
 jobs:
   quality:
-    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
 
   pack:
     name: Package dry run
diff --git a/.github/workflows/npm-release.yml b/.github/workflows/npm-release.yml
index 4c0fa26..d578359 100644
--- a/.github/workflows/npm-release.yml
+++ b/.github/workflows/npm-release.yml
@@ -15,7 +15,7 @@ permissions:
 
 jobs:
   quality:
-    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
 
   metadata:
     needs: quality
@@ -52,7 +52,7 @@ jobs:
     permissions:
       contents: read
       id-token: write
-    uses: burnt-labs/github-workflows/.github/workflows/npm-publish.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/npm-publish.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
     with:
       quality-policy: ${{ needs.quality.outputs.quality-policy }}
       npm-policy: ${{ needs.quality.outputs.npm-policy }}
diff --git a/.github/workflows/phala-deploy.yml b/.github/workflows/phala-deploy.yml
index e643311..e32daa9 100644
--- a/.github/workflows/phala-deploy.yml
+++ b/.github/workflows/phala-deploy.yml
@@ -39,7 +39,7 @@ jobs:
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           repository: burnt-labs/github-workflows
-          ref: 8373e9454803608c670431a67bd416178c633144 # v1.5.0
+          ref: ed309eaa57dfea000dfe6f4fbcb3c5c16773cd6e # v1.6.0
           path: .burnt-workflows
       - id: policy
         name: Require and validate Phala policy
@@ -47,7 +47,7 @@ jobs:
 
   quality:
     needs: policy
-    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@cf3eb33ac3deeb6aaff90165702ce5e4e73b6688 # v1.5.0
+    uses: burnt-labs/github-workflows/.github/workflows/required-quality.yml@992944a4d890e517aa314204e5dceb49a42555c3 # v1.6.0
 
   deploy:
     name: Phala ${{ inputs.target }}
@@ -78,7 +78,10 @@ jobs:
           IMAGE_NAME: ${{ fromJSON(needs.policy.outputs.phala).image.name }}
         run: |
           repository="$(printf '%s' "$GITHUB_REPOSITORY" | tr '[:upper:]' '[:lower:]')"
-          echo "image=ghcr.io/${repository}/${IMAGE_NAME}:${GITHUB_SHA}" >> "$GITHUB_OUTPUT"
+          {
+            echo "repository=ghcr.io/${repository}/${IMAGE_NAME}"
+            echo "image=ghcr.io/${repository}/${IMAGE_NAME}:${GITHUB_SHA}"
+          } >> "$GITHUB_OUTPUT"
       - name: Collect deployment credentials and runtime configuration
         env:
           ALL_SECRETS: ${{ toJSON(secrets) }}
@@ -87,8 +90,6 @@ jobs:
           REGISTRY_PASSWORD_NAME: ${{ fromJSON(needs.policy.outputs.phala).credentials.registryPasswordSecret }}
           SECRET_NAMES: ${{ toJSON(fromJSON(needs.policy.outputs.phala).runtimeSecrets) }}
           VARIABLE_NAMES: ${{ toJSON(fromJSON(needs.policy.outputs.phala).runtimeVariables) }}
-          IMAGE_VARIABLE: ${{ fromJSON(needs.policy.outputs.phala).image.composeVariable }}
-          IMAGE: ${{ steps.image.outputs.image }}
           REGISTRY_USERNAME: ${{ fromJSON(needs.policy.outputs.phala).image.registryUsername }}
         run: |
           node - <<'NODE'
@@ -112,7 +113,6 @@ jobs:
           const environment = Object.fromEntries([
             ...secretNames.map((name) => [name, secrets[name]]),
             ...variableNames.map((name) => [name, variables[name]]),
-            [process.env.IMAGE_VARIABLE, process.env.IMAGE],
             ["DSTACK_DOCKER_REGISTRY", "ghcr.io"],
             ["DSTACK_DOCKER_USERNAME", process.env.REGISTRY_USERNAME],
             ["DSTACK_DOCKER_PASSWORD", registryPassword],
@@ -145,16 +145,66 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ github.token }}
       - name: Build and push image
+        id: build
         uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
         with:
           context: ${{ fromJSON(needs.policy.outputs.phala).image.context }}
           file: ${{ fromJSON(needs.policy.outputs.phala).image.dockerfile }}
           push: true
           tags: ${{ steps.image.outputs.image }}
+      # dstack hashes the compose text it is given, and that hash is what a
+      # relying party's allowlist checks. Substituting the image here rather
+      # than delivering it as a CVM environment variable is the whole point:
+      # expanded, the attested compose identity names the exact bytes running;
+      # left as a variable, it names the topology and nothing about the
+      # application. The reference is by digest, not by the commit tag, because
+      # a tag can be repointed after the deploy.
+      - name: Render the compose file
+        id: compose
+        env:
+          COMPOSE_FILE: ${{ fromJSON(needs.policy.outputs.phala).composeFile }}
+          WORKING_DIRECTORY: ${{ fromJSON(needs.policy.outputs.phala).workingDirectory }}
+          IMAGE_VARIABLE: ${{ fromJSON(needs.policy.outputs.phala).image.composeVariable }}
+          IMAGE_REPOSITORY: ${{ steps.image.outputs.repository }}
+          IMAGE_DIGEST: ${{ steps.build.outputs.digest }}
+        run: |
+          cd "$WORKING_DIRECTORY"
+          node - <<'NODE'
+          const fs = require("node:fs");
+          const path = require("node:path");
+          const variable = process.env.IMAGE_VARIABLE;
+          const digest = process.env.IMAGE_DIGEST;
+          if (!/^sha256:[0-9a-f]{64}$/.test(digest ?? "")) {
+            process.stderr.write(`::error::The image push reported no usable digest: ${digest}\n`);
+            process.exit(1);
+          }
+          const reference = `${process.env.IMAGE_REPOSITORY}@${digest}`;
+          const source = fs.readFileSync(process.env.COMPOSE_FILE, "utf8");
+          // The two spellings a compose file may use: the bare ${VAR} and the
+          // required form ${VAR:?message}. The default form ${VAR:-fallback}
+          // is deliberately not matched — a default image reference is one a
+          // deploy could silently fall back to, which is the opposite of what
+          // an attested compose identity is for. It fails the check below
+          // instead. Anything else mentioning the variable is caught there too.
+          const placeholder = new RegExp(`\\$\\{${variable}(:\\?[^}]*)?\\}`, "g");
+          const rendered = source.replace(placeholder, reference);
+          if (rendered === source) {
+            process.stderr.write(`::error::${process.env.COMPOSE_FILE} does not reference \${${variable}}\n`);
+            process.exit(1);
+          }
+          if (rendered.includes(variable)) {
+            process.stderr.write(`::error::${variable} still appears in the rendered compose file\n`);
+            process.exit(1);
+          }
+          const target = path.join(process.env.RUNNER_TEMP, "phala-compose.yaml");
+          fs.writeFileSync(target, rendered);
+          fs.appendFileSync(process.env.GITHUB_OUTPUT, `file=${target}\n`);
+          process.stdout.write(`Deploying ${reference}\n`);
+          NODE
       - name: Deploy CVM
         env:
           CVM_NAME: ${{ fromJSON(needs.policy.outputs.phala).targets[inputs.target].cvmName }}
-          COMPOSE_FILE: ${{ fromJSON(needs.policy.outputs.phala).composeFile }}
+          COMPOSE_FILE: ${{ steps.compose.outputs.file }}
           WORKING_DIRECTORY: ${{ fromJSON(needs.policy.outputs.phala).workingDirectory }}
         run: |
           cd "$WORKING_DIRECTORY"
diff --git a/.github/workflows/required-quality.yml b/.github/workflows/required-quality.yml
index 38e9fce..aa06a37 100644
--- a/.github/workflows/required-quality.yml
+++ b/.github/workflows/required-quality.yml
@@ -81,7 +81,7 @@ jobs:
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           repository: burnt-labs/github-workflows
-          ref: 8373e9454803608c670431a67bd416178c633144 # v1.5.0
+          ref: ed309eaa57dfea000dfe6f4fbcb3c5c16773cd6e # v1.6.0
           path: .burnt-workflows
       - id: policy
         name: Validate policies
diff --git a/AGENTS.md b/AGENTS.md
index e219e36..5fb3c8c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -157,7 +157,26 @@ orchestration.
 ```
 
 The image is always tagged with the deploying commit SHA and pushed to GHCR.
-The Actions job token pushes it. The secret named by
+The Actions job token pushes it.
+
+`image.composeVariable` is expanded into the compose file before the deploy,
+not delivered to the CVM as an environment variable. dstack hashes the compose
+text it receives, and that hash is the only part of the attested identity that
+says anything about the application — the platform measurement covers the base
+dstack OS image. Left as a variable, the compose hash is stable across deploys
+and binds the topology while the image arrives outside anything measured, so an
+overwritten tag would run different bytes under an unchanged attested identity.
+Expanded, and expanded _by digest_ rather than by the commit tag, the hash names
+the exact bytes running. The consequence is intended: the compose hash changes
+on every deploy, so a relying party's allowlist is re-pinned per deploy. That is
+what pinning means.
+
+A compose file may write the placeholder as `${VAR}` or `${VAR:?message}`.
+`${VAR:-fallback}` is rejected on purpose: a default image reference is one a
+deploy could silently fall back to, which is the opposite of what an attested
+compose identity is for. A compose file that does not reference the variable in
+an accepted form fails the deploy, as does one where the name survives
+substitution. The secret named by
 `credentials.registryPasswordSecret` is a separate durable read-package
 credential sealed into the CVM for future pulls. Never substitute the ephemeral
 job token for that credential.
diff --git a/README.md b/README.md
index ee4d997..2d4c10e 100644
--- a/README.md
+++ b/README.md
@@ -337,6 +337,12 @@ jobs:
     secrets: inherit
 ```
 
+`image.composeVariable` is substituted into the compose file before the deploy,
+by digest, so the compose hash dstack measures names the exact image running. It
+is not delivered to the CVM as an environment variable. The compose hash
+therefore changes on every deploy and relying-party allowlists are re-pinned per
+deploy.
+
 The credential fields and `runtimeSecrets` select exact names from the target
 GitHub Environment's inherited secrets; `runtimeVariables` selects exact names
 from its variables. A missing declared value fails before build or deploy. The
diff --git a/tests/workflows.test.mjs b/tests/workflows.test.mjs
index 2f26a65..a42f355 100644
--- a/tests/workflows.test.mjs
+++ b/tests/workflows.test.mjs
@@ -272,6 +272,60 @@ test("Phala seals only policy-allowlisted runtime configuration", () => {
   assert.doesNotMatch(source, /environment-json|CUE_|TEE_SERVICE_URL/);
 });
 
+test("Phala deploys a compose file that names the image by digest", () => {
+  // The compose text is what dstack hashes, and that hash is the only link
+  // between a relying party's allowlist and the application. Delivering the
+  // image as a CVM environment variable instead leaves the attested identity
+  // covering the topology and nothing about which build is running.
+  const workflow = parse(
+    fs.readFileSync(`${directory}/phala-deploy.yml`, "utf8"),
+  );
+  const steps = workflow.jobs.deploy.steps;
+  const render = steps.find((step) => step.name === "Render the compose file");
+  const deploy = steps.find((step) => step.name === "Deploy CVM");
+  const collect = steps.find(
+    (step) =>
+      step.name === "Collect deployment credentials and runtime configuration",
+  );
+
+  assert.ok(render, "the compose file must be rendered before the deploy");
+  assert.match(render.env.IMAGE_DIGEST, /steps\.build\.outputs\.digest/);
+  assert.match(render.env.IMAGE_VARIABLE, /composeVariable/);
+  // By digest, never by the commit tag: a tag can be repointed after deploy,
+  // which is the whole failure this closes.
+  assert.match(render.run, /sha256:\[0-9a-f\]\{64\}/);
+  assert.match(render.run, /IMAGE_REPOSITORY\}@\$\{digest\}/);
+
+  // Silence is the danger: a placeholder that does not match must fail rather
+  // than deploy a compose file with an unexpanded variable in it.
+  assert.match(render.run, /does not reference/);
+  assert.match(render.run, /still appears in the rendered compose file/);
+  // ${VAR:-fallback} must not be substituted. A default image reference is one
+  // a deploy could silently fall back to, which defeats the point of measuring
+  // the compose file at all; it has to fail the placeholder check instead.
+  assert.doesNotMatch(render.run, /\[-\?\]/);
+
+  assert.match(deploy.env.COMPOSE_FILE, /steps\.compose\.outputs\.file/);
+  assert.doesNotMatch(deploy.env.COMPOSE_FILE, /policy\.outputs/);
+
+  // The image must not also travel as an environment variable; two sources for
+  // one fact is how they drift apart.
+  assert.doesNotMatch(collect.run, /IMAGE_VARIABLE/);
+  assert.equal(collect.env.IMAGE, undefined);
+
+  const build = steps.find((step) => step.name === "Build and push image");
+  assert.ok(build, "the deploy must build and push the image it deploys");
+  assert.equal(
+    build.id,
+    "build",
+    "the digest is only available from an id'd step",
+  );
+  assert.ok(
+    steps.indexOf(build) < steps.indexOf(render),
+    "the image must be pushed before its digest is substituted",
+  );
+});
+
 test("Phala private-image credentials are durable and separate from the push token", () => {
   const workflow = parse(
     fs.readFileSync(`${directory}/phala-deploy.yml`, "utf8"),