diff --git a/expressions/package.json b/expressions/package.json
index 2552d3b..1d592de 100755
--- a/expressions/package.json
+++ b/expressions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@actions/expressions",
-  "version": "0.3.17",
+  "version": "0.3.18",
   "license": "MIT",
   "type": "module",
   "source": "./src/index.ts",
@@ -9,10 +9,12 @@
   },
   "exports": {
     ".": {
-      "import": "./dist/index.js"
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
     },
     "./*": {
-      "import": "./dist/*.js"
+      "import": "./dist/*.js",
+      "types": "./dist/*.d.ts"
     }
   },
   "typesVersions": {
diff --git a/languageserver/package.json b/languageserver/package.json
index 3f0ee2b..201f875 100644
--- a/languageserver/package.json
+++ b/languageserver/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@actions/languageserver",
-  "version": "0.3.17",
+  "version": "0.3.18",
   "description": "Language server for GitHub Actions",
   "license": "MIT",
   "type": "module",
@@ -43,8 +43,8 @@
     "watch": "tsc --build tsconfig.build.json --watch"
   },
   "dependencies": {
-    "@actions/languageservice": "^0.3.17",
-    "@actions/workflow-parser": "^0.3.17",
+    "@actions/languageservice": "^0.3.18",
+    "@actions/workflow-parser": "^0.3.18",
     "@octokit/rest": "^21.1.1",
     "@octokit/types": "^9.0.0",
     "vscode-languageserver": "^8.0.2",
diff --git a/languageservice/package.json b/languageservice/package.json
index c9ae6bf..3c3762d 100644
--- a/languageservice/package.json
+++ b/languageservice/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@actions/languageservice",
-  "version": "0.3.17",
+  "version": "0.3.18",
   "description": "Language service for GitHub Actions",
   "license": "MIT",
   "type": "module",
@@ -44,8 +44,8 @@
     "watch": "tsc --build tsconfig.build.json --watch"
   },
   "dependencies": {
-    "@actions/expressions": "^0.3.17",
-    "@actions/workflow-parser": "^0.3.17",
+    "@actions/expressions": "^0.3.18",
+    "@actions/workflow-parser": "^0.3.18",
     "vscode-languageserver-textdocument": "^1.0.7",
     "vscode-languageserver-types": "^3.17.2",
     "vscode-uri": "^3.0.8",
diff --git a/languageservice/src/complete.test.ts b/languageservice/src/complete.test.ts
index f4ca821..cf45095 100644
--- a/languageservice/src/complete.test.ts
+++ b/languageservice/src/complete.test.ts
@@ -70,7 +70,7 @@ jobs:
     |`;
     const result = await complete(...getPositionFromCursor(input));
     expect(result).not.toBeUndefined();
-    expect(result.length).toEqual(20);
+    expect(result.length).toEqual(21);
   });
 
   it("string definition completion in sequence", async () => {
@@ -243,7 +243,7 @@ jobs:
     runs-|`;
     const result = await complete(...getPositionFromCursor(input));
     expect(result).not.toBeUndefined();
-    expect(result).toHaveLength(20);
+    expect(result).toHaveLength(21);
   });
 
   it("job key with comment afterwards", async () => {
@@ -254,7 +254,7 @@ jobs:
   #`;
     const result = await complete(...getPositionFromCursor(input));
     expect(result).not.toBeUndefined();
-    expect(result).toHaveLength(20);
+    expect(result).toHaveLength(21);
   });
 
   it("job key with other values afterwards", async () => {
@@ -266,7 +266,7 @@ jobs:
     concurrency: 'group-name'`;
     const result = await complete(...getPositionFromCursor(input));
     expect(result).not.toBeUndefined();
-    expect(result).toHaveLength(19);
+    expect(result).toHaveLength(20);
   });
 
   it("step key without space after colon", async () => {
@@ -335,7 +335,7 @@ jobs:
     - uses: actions/checkout@v2
 `;
     const result = await complete(...getPositionFromCursor(input));
-    expect(result).toHaveLength(16);
+    expect(result).toHaveLength(17);
   });
 
   it("complete from behind a colon will replace it", async () => {
@@ -348,7 +348,7 @@ jobs:
     - uses: actions/checkout@v2
 `;
     const result = await complete(...getPositionFromCursor(input));
-    expect(result).toHaveLength(16);
+    expect(result).toHaveLength(17);
     const textEdit = result[0].textEdit as TextEdit;
     expect(textEdit.range).toEqual({
       start: {line: 5, character: 4},
diff --git a/lerna.json b/lerna.json
index f74e517..f3d943b 100644
--- a/lerna.json
+++ b/lerna.json
@@ -6,5 +6,5 @@
     "languageservice",
     "languageserver"
   ],
-  "version": "0.3.17"
+  "version": "0.3.18"
 }
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 2fc195d..17b9f17 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -135,7 +135,7 @@
     },
     "expressions": {
       "name": "@actions/expressions",
-      "version": "0.3.17",
+      "version": "0.3.18",
       "license": "MIT",
       "devDependencies": {
         "@types/jest": "^29.0.3",
@@ -395,11 +395,11 @@
     },
     "languageserver": {
       "name": "@actions/languageserver",
-      "version": "0.3.17",
+      "version": "0.3.18",
       "license": "MIT",
       "dependencies": {
-        "@actions/languageservice": "^0.3.17",
-        "@actions/workflow-parser": "^0.3.17",
+        "@actions/languageservice": "^0.3.18",
+        "@actions/workflow-parser": "^0.3.18",
         "@octokit/rest": "^21.1.1",
         "@octokit/types": "^9.0.0",
         "vscode-languageserver": "^8.0.2",
@@ -921,11 +921,11 @@
     },
     "languageservice": {
       "name": "@actions/languageservice",
-      "version": "0.3.17",
+      "version": "0.3.18",
       "license": "MIT",
       "dependencies": {
-        "@actions/expressions": "^0.3.17",
-        "@actions/workflow-parser": "^0.3.17",
+        "@actions/expressions": "^0.3.18",
+        "@actions/workflow-parser": "^0.3.18",
         "vscode-languageserver-textdocument": "^1.0.7",
         "vscode-languageserver-types": "^3.17.2",
         "vscode-uri": "^3.0.8",
@@ -6760,15 +6760,16 @@
       }
     },
     "node_modules/form-data": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.2.tgz",
-      "integrity": "sha512-hGfm/slu0ZabnNt4oaRZ6uREyfCj6P4fT/n6A1rGV+Z0VdGXjfOhVUpkn6qVQONHGIFwmveGXyDs75+nr6FM8w==",
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.4.tgz",
+      "integrity": "sha512-KrGhL9Q4zjj0kiUt5OO4Mr/A/jlI2jDYs5eHBpYHPcBEVSiipAvn2Ko2HnPe20rmcuuvMHNdZFp+4IlGTMF0Ow==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "asynckit": "^0.4.0",
         "combined-stream": "^1.0.8",
         "es-set-tostringtag": "^2.1.0",
+        "hasown": "^2.0.2",
         "mime-types": "^2.1.12"
       },
       "engines": {
@@ -12916,10 +12917,10 @@
     },
     "workflow-parser": {
       "name": "@actions/workflow-parser",
-      "version": "0.3.17",
+      "version": "0.3.18",
       "license": "MIT",
       "dependencies": {
-        "@actions/expressions": "^0.3.17",
+        "@actions/expressions": "^0.3.18",
         "cronstrue": "^2.21.0",
         "yaml": "^2.0.0-8"
       },
diff --git a/workflow-parser/package.json b/workflow-parser/package.json
index a08ceb6..e95a843 100644
--- a/workflow-parser/package.json
+++ b/workflow-parser/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@actions/workflow-parser",
-  "version": "0.3.17",
+  "version": "0.3.18",
   "license": "MIT",
   "type": "module",
   "source": "./src/index.ts",
@@ -9,10 +9,12 @@
   },
   "exports": {
     ".": {
-      "import": "./dist/index.js"
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
     },
     "./*": {
-      "import": "./dist/*.js"
+      "import": "./dist/*.js",
+      "types": "./dist/*.d.ts"
     }
   },
   "typesVersions": {
@@ -43,7 +45,7 @@
     "watch": "tsc --build tsconfig.build.json --watch"
   },
   "dependencies": {
-    "@actions/expressions": "^0.3.17",
+    "@actions/expressions": "^0.3.18",
     "cronstrue": "^2.21.0",
     "yaml": "^2.0.0-8"
   },
diff --git a/workflow-parser/src/model/converter/job.ts b/workflow-parser/src/model/converter/job.ts
index 1886207..2ee2c70 100644
--- a/workflow-parser/src/model/converter/job.ts
+++ b/workflow-parser/src/model/converter/job.ts
@@ -16,7 +16,16 @@ export function convertJob(context: TemplateContext, jobKey: StringToken, token:
     context.error(jobKey, error);
   }
 
-  let concurrency, container, env, environment, name, outputs, runsOn, services, strategy: TemplateToken | undefined;
+  let concurrency,
+    container,
+    env,
+    environment,
+    name,
+    outputs,
+    runsOn,
+    services,
+    strategy,
+    snapshot: TemplateToken | undefined;
   let needs: StringToken[] | undefined = undefined;
   let steps: Step[] = [];
   let workflowJobRef: StringToken | undefined;
@@ -86,6 +95,10 @@ export function convertJob(context: TemplateContext, jobKey: StringToken, token:
         services = item.value;
         break;
 
+      case "snapshot":
+        snapshot = item.value;
+        break;
+
       case "steps":
         steps = convertSteps(context, item.value);
         break;
@@ -147,7 +160,8 @@ export function convertJob(context: TemplateContext, jobKey: StringToken, token:
       container,
       services,
       outputs,
-      steps
+      steps,
+      snapshot
     };
   }
 }
diff --git a/workflow-parser/src/model/workflow-template.ts b/workflow-parser/src/model/workflow-template.ts
index 679da4f..ebe10ac 100644
--- a/workflow-parser/src/model/workflow-template.ts
+++ b/workflow-parser/src/model/workflow-template.ts
@@ -41,6 +41,7 @@ export type BaseJob = {
   concurrency?: TemplateToken;
   strategy?: TemplateToken;
   outputs?: MappingToken;
+  snapshot?: TemplateToken;
 };
 
 // `job-factory` in the schema
diff --git a/workflow-parser/src/workflow-v1.0.json b/workflow-parser/src/workflow-v1.0.json
index 6faa40e..3ccc372 100644
--- a/workflow-parser/src/workflow-v1.0.json
+++ b/workflow-parser/src/workflow-v1.0.json
@@ -1767,7 +1767,8 @@
           "concurrency": "job-concurrency",
           "outputs": "job-outputs",
           "defaults": "job-defaults",
-          "steps": "steps"
+          "steps": "steps",
+          "snapshot": "snapshot"
         }
       }
     },
@@ -1911,6 +1912,43 @@
         "loose-value-type": "any"
       }
     },
+    "snapshot": {
+      "description": "Use `snapshot` to define a custom image you want to create or update after your job succeeds by taking a snapshot of your runner.",
+      "one-of": [
+        "non-empty-string",
+        "snapshot-mapping"
+      ]
+    },
+    "snapshot-mapping": {
+      "mapping": {
+        "properties": {
+          "image-name": {
+            "description": "The desired name of the custom image you want to create or update.",
+            "type": "non-empty-string",
+            "required": true
+          },
+          "if": "snapshot-if",
+          "version": {
+            "description": "The desired major version updates upon a new custom image version creation.",
+            "type": "non-empty-string"
+          }
+        }
+      }
+    },
+    "snapshot-if": {
+      "context": [
+        "github",
+        "inputs",
+        "vars",
+        "needs",
+        "strategy",
+        "matrix"
+      ],
+      "description": "Use the if conditional to prevent a snapshot from being taken unless a condition is met. Any supported context and expression can be used to create a conditional. Expressions in an `if` conditional do not require the bracketed expression syntax. When you use expressions in an `if` conditional, you may omit the expression syntax because GitHub automatically evaluates the `if` conditional as an expression.",
+      "string": {
+        "is-expression": true
+      }
+    },
     "runs-on": {
       "description": "Use `runs-on` to define the type of machine to run the job on.\n* The destination machine can be either a GitHub-hosted runner, larger runner, or a self-hosted runner.\n* You can target runners based on the labels assigned to them, or their group membership, or a combination of these.\n* You can provide `runs-on` as a single string or as an array of strings.\n* If you specify an array of strings, your workflow will execute on any runner that matches all of the specified `runs-on` values.\n* If you would like to run your workflow on multiple machines, use `jobs.<job_id>.strategy`.",
       "context": [
diff --git a/workflow-parser/testdata/reader/job-snapshot-mapping.yml b/workflow-parser/testdata/reader/job-snapshot-mapping.yml
new file mode 100644
index 0000000..2689a6e
--- /dev/null
+++ b/workflow-parser/testdata/reader/job-snapshot-mapping.yml
@@ -0,0 +1,58 @@
+include-source: false # Drop file/line/col from output
+---
+on: push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo hi
+    snapshot: 
+      image-name: custom-image
+      version: 1.*
+      if: ${{ github.event_name == 'something' }}
+
+---
+{
+  "jobs": [
+    {
+      "type": "job",
+      "id": "build",
+      "name": "build",
+      "if": {
+        "type": 3,
+        "expr": "success()"
+      },
+      "runs-on": "ubuntu-latest",
+      "steps": [
+        {
+          "id": "__run",
+          "if": {
+            "type": 3,
+            "expr": "success()"
+          },
+          "run": "echo hi"
+        }
+      ],
+      "snapshot": {
+        "type": 2,
+        "map": [
+          {
+            "Key": "image-name",
+            "Value": "custom-image"
+          },
+          {
+            "Key": "version",
+            "Value": "1.*"
+          },
+          {
+            "Key": "if",
+            "Value": {
+              "type": 3,
+              "expr": "github.event_name == 'something'"
+            }
+          }
+        ]
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/workflow-parser/testdata/reader/job-snapshot-simple.yml b/workflow-parser/testdata/reader/job-snapshot-simple.yml
new file mode 100644
index 0000000..b009a09
--- /dev/null
+++ b/workflow-parser/testdata/reader/job-snapshot-simple.yml
@@ -0,0 +1,42 @@
+include-source: false # Drop file/line/col from output
+---
+# on: push
+# jobs:
+#   job1:
+#     runs-on: windows-2019
+#     snapshot: custom-image
+#     steps:
+#     - run: echo 1
+on: push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo hi
+    snapshot: custom-image
+---
+{
+  "jobs": [
+    {
+      "type": "job",
+      "id": "build",
+      "name": "build",
+      "if": {
+        "type": 3,
+        "expr": "success()"
+      },
+      "runs-on": "ubuntu-latest",
+      "steps": [
+        {
+          "id": "__run",
+          "if": {
+            "type": 3,
+            "expr": "success()"
+          },
+          "run": "echo hi"
+        }
+      ],
+      "snapshot": "custom-image"
+    }
+  ]
+}
\ No newline at end of file