diff --git a/languageservice/src/complete.expressions.test.ts b/languageservice/src/complete.expressions.test.ts
index 64fdd12..f76ce45 100644
--- a/languageservice/src/complete.expressions.test.ts
+++ b/languageservice/src/complete.expressions.test.ts
@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-non-null-assertion */
 import {data, DescriptionDictionary} from "@github/actions-expressions";
 import {CompletionItem, CompletionItemKind} from "vscode-languageserver-types";
 import {complete, getExpressionInput} from "./complete";
@@ -9,17 +10,19 @@ import {testFileProvider} from "./test-utils/test-file-provider";
 import {clearCache} from "./utils/workflow-cache";
 
 const contextProviderConfig: ContextProviderConfig = {
-  getContext: async (context: string) => {
+  getContext: (context: string) => {
     switch (context) {
       case "github":
-        return new DescriptionDictionary({
-          key: "event",
-          value: new data.StringData("push"),
-          description: "The event that triggered the workflow"
-        });
+        return Promise.resolve(
+          new DescriptionDictionary({
+            key: "event",
+            value: new data.StringData("push"),
+            description: "The event that triggered the workflow"
+          })
+        );
     }
 
-    return undefined;
+    return Promise.resolve(undefined);
   }
 };
 
diff --git a/languageservice/src/complete.ts b/languageservice/src/complete.ts
index 870138d..8b6a043 100644
--- a/languageservice/src/complete.ts
+++ b/languageservice/src/complete.ts
@@ -225,6 +225,10 @@ function getExpressionCompletionItems(
   context: DescriptionDictionary,
   pos: Position
 ): CompletionItem[] {
+  if (!token.range) {
+    return [];
+  }
+
   let currentInput = "";
 
   if (isBasicExpression(token)) {
@@ -234,15 +238,15 @@ function getExpressionCompletionItems(
     currentInput = stringToken.source || stringToken.value;
   }
 
-  const relCharOffset = getRelCharOffset(token.range!, currentInput, pos);
+  const relCharOffset = getRelCharOffset(token.range, currentInput, pos);
   const expressionInput = (getExpressionInput(currentInput, relCharOffset) || "").trim();
 
   try {
     return completeExpression(expressionInput, context, [], validatorFunctions).map(item =>
       mapExpressionCompletionItem(item, currentInput[relCharOffset])
     );
-  } catch (e: any) {
-    error(`Error while completing expression: '${e?.message || "<no details>"}'`);
+  } catch (e) {
+    error(`Error while completing expression: '${(e as Error)?.message || "<no details>"}'`);
     return [];
   }
 }
diff --git a/languageservice/src/context-providers/events/eventPayloads.ts b/languageservice/src/context-providers/events/eventPayloads.ts
index 039f0b1..e0228ea 100644
--- a/languageservice/src/context-providers/events/eventPayloads.ts
+++ b/languageservice/src/context-providers/events/eventPayloads.ts
@@ -73,10 +73,10 @@ type DeduplicatedWebhooks = {
   };
 };
 
-// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+/* eslint-disable @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-explicit-any */
 const dedupedWebhookPayloads: DeduplicatedWebhooks = webhooks as any;
-// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
 const objects: Param[] = webhookObjects as any;
+/* eslint-enable @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-explicit-any */
 
 // Hydrated webhook payloads
 const webhookPayloads: Webhooks = {};
diff --git a/languageservice/src/hover.expressions.test.ts b/languageservice/src/hover.expressions.test.ts
index 990ebe0..f5f4141 100644
--- a/languageservice/src/hover.expressions.test.ts
+++ b/languageservice/src/hover.expressions.test.ts
@@ -8,28 +8,30 @@ import {TestLogger} from "./test-utils/logger";
 import {clearCache} from "./utils/workflow-cache";
 
 const contextProviderConfig: ContextProviderConfig = {
-  getContext: async (context: string) => {
+  getContext: (context: string) => {
     switch (context) {
       case "github":
-        return new DescriptionDictionary(
-          {
-            key: "event",
-            value: new data.StringData("push"),
-            description: "The event that triggered the workflow"
-          },
-          {
-            key: "test",
-            value: new DescriptionDictionary({
-              key: "name",
+        return Promise.resolve(
+          new DescriptionDictionary(
+            {
+              key: "event",
               value: new data.StringData("push"),
-              description: "Name for the test"
-            }),
-            description: "Test dictionary"
-          }
+              description: "The event that triggered the workflow"
+            },
+            {
+              key: "test",
+              value: new DescriptionDictionary({
+                key: "name",
+                value: new data.StringData("push"),
+                description: "Name for the test"
+              }),
+              description: "Test dictionary"
+            }
+          )
         );
     }
 
-    return undefined;
+    return Promise.resolve(undefined);
   }
 };
 
diff --git a/languageservice/src/hover.test.ts b/languageservice/src/hover.test.ts
index d43d868..9d48303 100644
--- a/languageservice/src/hover.test.ts
+++ b/languageservice/src/hover.test.ts
@@ -1,5 +1,4 @@
 import {isString} from "@github/actions-workflow-parser";
-import {StringToken} from "@github/actions-workflow-parser/templates/tokens/string-token";
 import {DescriptionProvider, hover, HoverConfig} from "./hover";
 import {getPositionFromCursor} from "./test-utils/cursor-position";
 import {testFileProvider} from "./test-utils/test-file-provider";
@@ -8,15 +7,16 @@ import {clearCache} from "./utils/workflow-cache";
 export function testHoverConfig(tokenValue: string, tokenKey: string, description?: string) {
   return {
     descriptionProvider: {
-      getDescription: async (_, token, __) => {
+      getDescription: (_, token) => {
         if (!isString(token)) {
           throw new Error("Test provider only supports string tokens");
         }
 
         expect(token.value).toEqual(tokenValue);
+        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
         expect(token.definition!.key).toEqual(tokenKey);
 
-        return description;
+        return Promise.resolve(description);
       }
     } satisfies DescriptionProvider,
     fileProvider: testFileProvider
diff --git a/languageservice/src/hover.ts b/languageservice/src/hover.ts
index f2cfed0..a1081c0 100644
--- a/languageservice/src/hover.ts
+++ b/languageservice/src/hover.ts
@@ -155,7 +155,8 @@ async function getDescription(
 function isCronMappingValue(tokenResult: TokenResult): boolean {
   return (
     tokenResult.parent?.definition?.key === "cron-mapping" &&
-    isString(tokenResult.token!) &&
+    !!tokenResult.token &&
+    isString(tokenResult.token) &&
     tokenResult.token.value !== "cron"
   );
 }
@@ -199,7 +200,7 @@ function expressionHover(
     };
   } catch (e) {
     // Hovering over an invalid expression should not cause an error here
-    info(`Encountered error trying to calculate expression hover: ${e}`);
+    info(`Encountered error trying to calculate expression hover: ${(e as Error).message}`);
     return null;
   }
 }
diff --git a/languageservice/src/nulltrace.ts b/languageservice/src/nulltrace.ts
index 51d9f66..8955a1a 100644
--- a/languageservice/src/nulltrace.ts
+++ b/languageservice/src/nulltrace.ts
@@ -1,7 +1,3 @@
-import {TraceWriter} from "@github/actions-workflow-parser/templates/trace-writer";
+import {NoOperationTraceWriter} from "@github/actions-workflow-parser/templates/trace-writer";
 
-export const nullTrace: TraceWriter = {
-  info: x => {},
-  verbose: x => {},
-  error: x => {}
-};
+export const nullTrace = new NoOperationTraceWriter();
diff --git a/languageservice/src/validate.actions.test.ts b/languageservice/src/validate.actions.test.ts
index 027d9e5..81f61bd 100644
--- a/languageservice/src/validate.actions.test.ts
+++ b/languageservice/src/validate.actions.test.ts
@@ -14,7 +14,7 @@ beforeEach(() => {
 });
 
 const validationConfig: ValidationConfig = {
-  fetchActionMetadata: async (ref: ActionReference) => {
+  fetchActionMetadata: (ref: ActionReference) => {
     let metadata: ActionMetadata | undefined = undefined;
     switch (ref.owner + "/" + ref.name + "@" + ref.ref) {
       case "actions/checkout@v3":
@@ -82,7 +82,7 @@ const validationConfig: ValidationConfig = {
           description: "An action with no inputs"
         };
     }
-    return metadata;
+    return Promise.resolve(metadata);
   }
 };
 
@@ -326,8 +326,8 @@ jobs:
     config.valueProviderConfig = {
       "step-with": {
         kind: ValueProviderKind.AllowedValues,
-        get: async () => {
-          return [{label: "repository", description: "Repository name with owner."}];
+        get: () => {
+          return Promise.resolve([{label: "repository", description: "Repository name with owner."}]);
         }
       }
     };
diff --git a/languageservice/src/validate.expressions.test.ts b/languageservice/src/validate.expressions.test.ts
index 747bb58..95a1c6d 100644
--- a/languageservice/src/validate.expressions.test.ts
+++ b/languageservice/src/validate.expressions.test.ts
@@ -1,4 +1,4 @@
-import {data, DescriptionDictionary} from "@github/actions-expressions/.";
+import {DescriptionDictionary} from "@github/actions-expressions/.";
 import {DiagnosticSeverity} from "vscode-languageserver-types";
 import {ContextProviderConfig} from "./context-providers/config";
 import {registerLogger} from "./log";
@@ -48,15 +48,16 @@ jobs:
 
   it("partial skip access invalid context on incomplete", async () => {
     const contextProviderConfig: ContextProviderConfig = {
-      getContext: async (context: string) => {
+      getContext: (context: string) => {
         switch (context) {
-          case "secrets":
+          case "secrets": {
             const dict = new DescriptionDictionary();
             dict.complete = false;
-            return dict;
+            return Promise.resolve(dict);
+          }
         }
 
-        return undefined;
+        return Promise.resolve(undefined);
       }
     };
 
diff --git a/languageservice/src/validate.test.ts b/languageservice/src/validate.test.ts
index 533de34..cb87c76 100644
--- a/languageservice/src/validate.test.ts
+++ b/languageservice/src/validate.test.ts
@@ -3,7 +3,7 @@ import {createDocument} from "./test-utils/document";
 import {validate} from "./validate";
 import {defaultValueProviders} from "./value-providers/default";
 import {clearCache} from "./utils/workflow-cache";
-import {ValueProvider, ValueProviderConfig, ValueProviderKind} from "./value-providers/config";
+import {ValueProviderConfig, ValueProviderKind} from "./value-providers/config";
 
 beforeEach(() => {
   clearCache();
@@ -249,7 +249,7 @@ jobs:
       const valueProviderConfig: ValueProviderConfig = {
         "job-environment": {
           kind: ValueProviderKind.AllowedValues,
-          get: async () => [{label: "test"}],
+          get: () => Promise.resolve([{label: "test"}]),
           caseInsensitive: false
         }
       };
@@ -286,7 +286,7 @@ jobs:
       const valueProviderConfig: ValueProviderConfig = {
         "job-environment": {
           kind: ValueProviderKind.AllowedValues,
-          get: async () => [{label: "test"}],
+          get: () => Promise.resolve([{label: "test"}]),
           caseInsensitive: true
         }
       };
diff --git a/languageservice/src/validate.ts b/languageservice/src/validate.ts
index f422873..13c0de7 100644
--- a/languageservice/src/validate.ts
+++ b/languageservice/src/validate.ts
@@ -23,6 +23,7 @@ import {validateAction} from "./validate-action";
 import {ValueProviderConfig, ValueProviderKind} from "./value-providers/config";
 import {defaultValueProviders} from "./value-providers/default";
 import {fetchOrParseWorkflow, fetchOrConvertWorkflowTemplate} from "./utils/workflow-cache";
+import {TokenRange} from "@github/actions-workflow-parser/templates/tokens/token-range";
 
 export type ValidationConfig = {
   valueProviderConfig?: ValueProviderConfig;
@@ -72,7 +73,7 @@ export async function validate(textDocument: TextDocument, config?: ValidationCo
       });
     }
   } catch (e) {
-    error(`Unhandled error while validating: ${e}`);
+    error(`Unhandled error while validating: ${(e as Error).message}`);
   }
 
   return diagnostics;
@@ -92,18 +93,18 @@ async function additionalValidations(
     const validationDefinition = validationToken.definition;
 
     // If this is an expression, validate it
-    if (isBasicExpression(token)) {
+    if (isBasicExpression(token) && token.range) {
       await validateExpression(
         diagnostics,
         token,
         validationToken.definitionInfo?.allowedContext || [],
         config?.contextProviderConfig,
-        getProviderContext(documentUri, template, root, token)
+        getProviderContext(documentUri, template, root, token.range)
       );
     }
 
-    if (token.definition?.key === "regular-step") {
-      const context = getProviderContext(documentUri, template, root, token);
+    if (token.definition?.key === "regular-step" && token.range) {
+      const context = getProviderContext(documentUri, template, root, token.range);
       await validateAction(diagnostics, token, context.step, config);
     }
 
@@ -129,7 +130,7 @@ async function additionalValidations(
       }
 
       if (valueProvider) {
-        const customValues = await valueProvider.get(getProviderContext(documentUri, template, root, token));
+        const customValues = await valueProvider.get(getProviderContext(documentUri, template, root, token.range));
         const caseInsensitive = valueProvider.caseInsensitive ?? false;
         const customValuesMap = new Set(customValues.map(x => (caseInsensitive ? x.label.toLowerCase() : x.label)));
 
@@ -161,12 +162,12 @@ function getProviderContext(
   documentUri: URI,
   template: WorkflowTemplate,
   root: TemplateToken,
-  token: TemplateToken
+  tokenRange: TokenRange
 ): WorkflowContext {
-  const {parent, path} = findToken(
+  const {path} = findToken(
     {
-      line: token.range!.start.line - 1,
-      character: token.range!.start.column - 1
+      line: tokenRange.start.line - 1,
+      character: tokenRange.start.column - 1
     },
     root
   );