some structural simplification

src/github/context.ts

@@ -37,6 +37,17 @@ export type ScheduleEvent = {
 import type { ModeName } from "../modes/types";
 import { DEFAULT_MODE, isValidMode } from "../modes/registry";
 
+// Event name constants for better maintainability
+const ENTITY_EVENT_NAMES = [
+  "issues",
+  "issue_comment",
+  "pull_request",
+  "pull_request_review",
+  "pull_request_review_comment",
+] as const;
+
+const AUTOMATION_EVENT_NAMES = ["workflow_dispatch", "schedule"] as const;
+
 // Common fields shared by all context types
 type BaseContext = {
   runId: string;
@@ -265,21 +276,12 @@ export function isIssuesAssignedEvent(
 export function isEntityContext(
   context: GitHubContext,
 ): context is ParsedGitHubContext {
-  return (
-    context.eventName === "issues" ||
-    context.eventName === "issue_comment" ||
-    context.eventName === "pull_request" ||
-    context.eventName === "pull_request_review" ||
-    context.eventName === "pull_request_review_comment"
-  );
+  return ENTITY_EVENT_NAMES.includes(context.eventName as any);
 }
 
 // Type guard to check if context is an automation context
 export function isAutomationContext(
   context: GitHubContext,
 ): context is AutomationContext {
-  return (
-    context.eventName === "workflow_dispatch" ||
-    context.eventName === "schedule"
-  );
+  return AUTOMATION_EVENT_NAMES.includes(context.eventName as any);
 }

src/modes/agent/index.ts

@@ -1,6 +1,7 @@
 import * as core from "@actions/core";
 import { mkdir, writeFile } from "fs/promises";
 import type { Mode, ModeOptions, ModeResult } from "../types";
+import { isAutomationContext } from "../../github/context";
 
 /**
  * Agent mode implementation.
@@ -15,10 +16,7 @@ export const agentMode: Mode = {
 
   shouldTrigger(context) {
     // Only trigger for automation events
-    return (
-      context.eventName === "workflow_dispatch" ||
-      context.eventName === "schedule"
-    );
+    return isAutomationContext(context);
   },
 
   prepareContext(context) {

src/modes/registry.ts

@@ -14,6 +14,7 @@ import type { Mode, ModeName } from "./types";
 import { tagMode } from "./tag";
 import { agentMode } from "./agent";
 import type { GitHubContext } from "../github/context";
+import { isAutomationContext } from "../github/context";
 
 export const DEFAULT_MODE = "tag" as const;
 export const VALID_MODES = ["tag", "agent"] as const;
@@ -44,11 +45,7 @@ export function getMode(name: ModeName, context: GitHubContext): Mode {
   }
 
   // Validate mode can handle the event type
-  if (
-    name === "tag" &&
-    (context.eventName === "workflow_dispatch" ||
-      context.eventName === "schedule")
-  ) {
+  if (name === "tag" && isAutomationContext(context)) {
     throw new Error(
       `Tag mode cannot handle ${context.eventName} events. Use 'agent' mode for automation events.`,
     );