fix: allow Forgejo bot actor on non-comment events

The self-trigger guard blocked the claude bot on all events. Loop risk
only exists for comment/review events (tag mode). PR, workflow_dispatch,
and schedule events are safe — refined the guard to only block on
issue_comment, issues, pull_request_review, and
pull_request_review_comment events.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/github/validation/actor.ts

@@ -18,14 +18,31 @@ export async function checkHumanActor(
   // check but still guard against self-triggering (infinite loop prevention).
   if (detectPlatform() === "forgejo") {
     const botName = githubContext.inputs.botName.replace(/\[bot\]$/, "");
-    if (
+    const isBotActor =
       githubContext.actor === botName ||
-      githubContext.actor === githubContext.inputs.botName
-    ) {
-      throw new Error(
-        `Blocking self-trigger on Forgejo: actor '${githubContext.actor}' matches bot_name '${githubContext.inputs.botName}'. This prevents infinite loops.`,
+      githubContext.actor === githubContext.inputs.botName;
+
+    if (isBotActor) {
+      // Self-trigger loop risk only exists for comment/issue events (tag mode).
+      // PR and other events (agent mode, workflow_dispatch) are safe — the bot
+      // pushing a branch or being triggered by schedule can't cause loops.
+      const loopRiskEvents = [
+        "issue_comment",
+        "issues",
+        "pull_request_review_comment",
+        "pull_request_review",
+      ];
+      if (loopRiskEvents.includes(githubContext.eventName)) {
+        throw new Error(
+          `Blocking self-trigger on Forgejo: actor '${githubContext.actor}' matches bot_name '${githubContext.inputs.botName}'. This prevents infinite loops.`,
+        );
+      }
+      console.log(
+        `Forgejo bot actor '${githubContext.actor}' allowed for event '${githubContext.eventName}' (no loop risk)`,
       );
+      return;
     }
+
     console.log(
       `Forgejo actor check passed for: ${githubContext.actor} (bot_name: ${githubContext.inputs.botName})`,
     );

test/actor.test.ts

@@ -205,5 +205,41 @@ describe("checkHumanActor", () => {
         "Blocking self-trigger on Forgejo",
       );
     });
+
+    test("should allow bot actor on pull_request events (no loop risk)", async () => {
+      const mockOctokit = createMockOctokit("User");
+      const context = createMockContext();
+      context.actor = "claude";
+      context.inputs.botName = "claude[bot]";
+      (context as { eventName: string }).eventName = "pull_request";
+
+      await expect(
+        checkHumanActor(mockOctokit, context),
+      ).resolves.toBeUndefined();
+    });
+
+    test("should allow bot actor on workflow_dispatch events (no loop risk)", async () => {
+      const mockOctokit = createMockOctokit("User");
+      const context = createMockContext();
+      context.actor = "claude";
+      context.inputs.botName = "claude[bot]";
+      (context as { eventName: string }).eventName = "workflow_dispatch";
+
+      await expect(
+        checkHumanActor(mockOctokit, context),
+      ).resolves.toBeUndefined();
+    });
+
+    test("should block bot actor on issue_comment events (loop risk)", async () => {
+      const mockOctokit = createMockOctokit("User");
+      const context = createMockContext();
+      context.actor = "claude";
+      context.inputs.botName = "claude[bot]";
+      // eventName defaults to "issue_comment" from createMockContext
+
+      await expect(checkHumanActor(mockOctokit, context)).rejects.toThrow(
+        "Blocking self-trigger on Forgejo",
+      );
+    });
   });
 });