diff --git a/actions-languageservice/src/complete.expressions.test.ts b/actions-languageservice/src/complete.expressions.test.ts
index 8e18cba..274fb45 100644
--- a/actions-languageservice/src/complete.expressions.test.ts
+++ b/actions-languageservice/src/complete.expressions.test.ts
@@ -1,31 +1,19 @@
-import {data} from "@github/actions-expressions/.";
+import {data} from "@github/actions-expressions";
 import {complete, getExpressionInput} from "./complete";
 import {ContextProviderConfig} from "./context-providers/config";
 import {getPositionFromCursor} from "./test-utils/cursor-position";
 
 const contextProviderConfig: ContextProviderConfig = {
-  async getContext(contexts: string[]): Promise<data.Dictionary | undefined> {
-    const context = new data.Dictionary();
-
-    for (const contextName of contexts) {
-      switch (contextName) {
-        case "github":
-          context.add(
-            "github",
-            new data.Dictionary({
-              key: "event",
-              value: new data.StringData("push")
-            })
-          );
-          break;
-
-        default:
-          context.add(contextName, new data.Dictionary());
-          break;
-      }
+  getContext: async (context: string) => {
+    switch (context) {
+      case "github":
+        return new data.Dictionary({
+          key: "event",
+          value: new data.StringData("push")
+        });
     }
 
-    return context;
+    return undefined;
   }
 };
 
@@ -102,5 +90,13 @@ describe("expressions", () => {
 
       expect(result.map(x => x.label)).toEqual(["event"]);
     });
+
+    it("using default context provider", async () => {
+      const input =
+        "on: push\njobs:\n  build:\n    runs-on: ubuntu-latest\n    environment:\n      url: ${{ runner.| }}\n    steps:\n      - run: echo";
+      const result = await complete(...getPositionFromCursor(input), undefined, contextProviderConfig);
+
+      expect(result.map(x => x.label)).toEqual(["arch", "name", "os", "temp", "tool_cache"]);
+    });
   });
 });
diff --git a/actions-languageservice/src/complete.ts b/actions-languageservice/src/complete.ts
index 160b8a4..9722fa1 100644
--- a/actions-languageservice/src/complete.ts
+++ b/actions-languageservice/src/complete.ts
@@ -1,4 +1,4 @@
-import {complete as completeExpression, data} from "@github/actions-expressions";
+import {complete as completeExpression} from "@github/actions-expressions";
 import {isSequence, isString, parseWorkflow} from "@github/actions-workflow-parser";
 import {CLOSE_EXPRESSION, OPEN_EXPRESSION} from "@github/actions-workflow-parser/templates/template-constants";
 import {TemplateToken} from "@github/actions-workflow-parser/templates/tokens/index";
@@ -9,6 +9,7 @@ import {File} from "@github/actions-workflow-parser/workflows/file";
 import {Position, TextDocument} from "vscode-languageserver-textdocument";
 import {CompletionItem} from "vscode-languageserver-types";
 import {ContextProviderConfig} from "./context-providers/config";
+import {getContext} from "./context-providers/default";
 import {nullTrace} from "./nulltrace";
 import {findInnerTokenAndParent} from "./utils/find-token";
 import {transform} from "./utils/transform";
@@ -61,8 +62,7 @@ export async function complete(
 
     const expressionInput = (getExpressionInput(currentInput, relCharPos) || "").trim();
 
-    const context =
-      (await contextProviderConfig?.getContext(innerToken.definition!.readerContext)) || new data.Dictionary();
+    const context = await getContext(innerToken.definition?.readerContext || [], contextProviderConfig);
 
     return completeExpression(expressionInput, context, []);
   }
diff --git a/actions-languageservice/src/context-providers/config.ts b/actions-languageservice/src/context-providers/config.ts
index 1b4e37e..49f61dd 100644
--- a/actions-languageservice/src/context-providers/config.ts
+++ b/actions-languageservice/src/context-providers/config.ts
@@ -2,9 +2,9 @@ import {data} from "@github/actions-expressions";
 import {Dictionary} from "@github/actions-expressions/data/dictionary";
 import {ExpressionData, Pair} from "@github/actions-expressions/data/expressiondata";
 
-export interface ContextProviderConfig {
-  getContext(contexts: string[]): Promise<data.Dictionary | undefined>;
-}
+export type ContextProviderConfig = {
+  getContext: (name: string) => Promise<data.Dictionary | undefined>;
+};
 
 /**
  * DynamicDictionary is a dictionary that returns an empty DynamicDictionary for
diff --git a/actions-languageservice/src/context-providers/default.ts b/actions-languageservice/src/context-providers/default.ts
new file mode 100644
index 0000000..cc964e9
--- /dev/null
+++ b/actions-languageservice/src/context-providers/default.ts
@@ -0,0 +1,48 @@
+import {data} from "@github/actions-expressions";
+import {ContextProviderConfig} from "./config";
+
+export async function getContext(names: string[], config: ContextProviderConfig | undefined): Promise<data.Dictionary> {
+  const context = new data.Dictionary();
+
+  for (const contextName of names) {
+    let value: data.Dictionary | undefined;
+
+    value = await getDefaultContext(contextName);
+
+    if (!value) {
+      value = await config?.getContext(contextName);
+    }
+
+    if (!value) {
+      value = new data.Dictionary();
+    }
+
+    context.add(contextName, value);
+  }
+
+  return context;
+}
+
+async function getDefaultContext(name: string): Promise<data.Dictionary | undefined> {
+  switch (name) {
+    case "runner":
+      return objectToDictionary({
+        os: "Linux",
+        arch: "X64",
+        name: "GitHub Actions 2",
+        tool_cache: "/opt/hostedtoolcache",
+        temp: "/home/runner/work/_temp"
+      });
+  }
+
+  return undefined;
+}
+
+function objectToDictionary(object: {[key: string]: string}): data.Dictionary {
+  const dictionary = new data.Dictionary();
+  for (const key in object) {
+    dictionary.add(key, new data.StringData(object[key]));
+  }
+
+  return dictionary;
+}
diff --git a/actions-languageservice/src/context-providers/runner.ts b/actions-languageservice/src/context-providers/runner.ts
new file mode 100644
index 0000000..e69de29