@@ -1,5 +1,9 @@
 # @actions/attest Releases
 
+### 1.6.0
+
+- Update `buildSLSAProvenancePredicate` to populate `workflow.ref` field from the `ref` claim in the OIDC token [#1969](https://github.com/actions/toolkit/pull/1969)
+
 ### 1.5.0
 
 - Bump @actions/core from 1.10.1 to 1.11.1 [#1847](https://github.com/actions/toolkit/pull/1847)
 
@@ -1,47 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`provenance functions buildSLSAProvenancePredicate handle tags including "@" character 1`] = `
-{
-  "params": {
-    "buildDefinition": {
-      "buildType": "https://actions.github.io/buildtypes/workflow/v1",
-      "externalParameters": {
-        "workflow": {
-          "path": ".github/workflows/main.yml",
-          "ref": "foo@1.0.0",
-          "repository": "https://foo.ghe.com/owner/repo",
-        },
-      },
-      "internalParameters": {
-        "github": {
-          "event_name": "push",
-          "repository_id": "repo-id",
-          "repository_owner_id": "owner-id",
-          "runner_environment": "github-hosted",
-        },
-      },
-      "resolvedDependencies": [
-        {
-          "digest": {
-            "gitCommit": "babca52ab0c93ae16539e5923cb0d7403b9a093b",
-          },
-          "uri": "git+https://foo.ghe.com/owner/repo@refs/heads/main",
-        },
-      ],
-    },
-    "runDetails": {
-      "builder": {
-        "id": "https://foo.ghe.com/owner/workflows/.github/workflows/publish.yml@main",
-      },
-      "metadata": {
-        "invocationId": "https://foo.ghe.com/owner/repo/actions/runs/run-id/attempts/run-attempt",
-      },
-    },
-  },
-  "type": "https://slsa.dev/provenance/v1",
-}
-`;
-
 exports[`provenance functions buildSLSAProvenancePredicate returns a provenance hydrated from an OIDC token 1`] = `
 {
   "params": {
@@ -50,7 +8,7 @@ exports[`provenance functions buildSLSAProvenancePredicate returns a provenance
       "externalParameters": {
         "workflow": {
           "path": ".github/workflows/main.yml",
-          "ref": "main",
+          "ref": "refs/heads/main",
           "repository": "https://foo.ghe.com/owner/repo",
         },
       },
 
@@ -75,16 +75,6 @@ describe('provenance functions', () => {
       const predicate = await buildSLSAProvenancePredicate()
       expect(predicate).toMatchSnapshot()
     })
-
-    it('handle tags including "@" character', async () => {
-      nock.cleanAll()
-      await mockIssuer({
-        ...claims,
-        workflow_ref: 'owner/repo/.github/workflows/main.yml@foo@1.0.0'
-      })
-      const predicate = await buildSLSAProvenancePredicate()
-      expect(predicate).toMatchSnapshot()
-    })
   })
 
   describe('attestProvenance', () => {
 
@@ -1,6 +1,6 @@
 {
   "name": "@actions/attest",
-  "version": "1.5.0",
+  "version": "1.6.0",
   "description": "Actions attestation lib",
   "keywords": [
     "github",
 
@@ -30,11 +30,9 @@ export const buildSLSAProvenancePredicate = async (
   // Split just the path and ref from the workflow string.
   // owner/repo/.github/workflows/main.yml@main =>
   //   .github/workflows/main.yml, main
-  const [workflowPath, ...workflowRefChunks] = claims.workflow_ref
+  const [workflowPath] = claims.workflow_ref
     .replace(`${claims.repository}/`, '')
     .split('@')
-  // Handle case where tag contains `@` (e.g: when using changesets in a monorepo context),
-  const workflowRef = workflowRefChunks.join('@')
 
   return {
     type: SLSA_PREDICATE_V1_TYPE,
@@ -43,7 +41,7 @@ export const buildSLSAProvenancePredicate = async (
         buildType: GITHUB_BUILD_TYPE,
         externalParameters: {
           workflow: {
-            ref: workflowRef,
+            ref: claims.ref,
             repository: `${serverURL}/${claims.repository}`,
             path: workflowPath
           }
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@actions/attest",`
`3`		`- "version": "1.5.0",`
	`3`	`+ "version": "1.6.0",`
`4`	`4`	`"description": "Actions attestation lib",`
`5`	`5`	`"keywords": [`
`6`	`6`	`"github",`