Review on request

run.ts

@@ -59,10 +59,10 @@ async function postComment(body: string): Promise<void> {
   });
 }
 
-// A pull request event is a review request, so the review is posted instead
-// of the response. It comes through a file, because a final chat message picks
-// up narration while a file's first line is written on purpose. That line is
-// the verdict, matched whole; anything unexpected only comments, never
+// A review is posted whenever the agent wrote one, whether a review request or
+// a comment asked for it. It comes through a file, because a final chat message
+// picks up narration while a file's first line is written on purpose. That line
+// is the verdict, matched whole; anything unexpected only comments, never
 // approves. The mark in front is added here, so it is never part of the match.
 const REVIEW_PATH = `${await Deno.makeTempDir()}/review.md`;
 const VERDICTS: Record<string, [event: string, mark: string]> = {
@@ -71,10 +71,13 @@ const VERDICTS: Record<string, [event: string, mark: string]> = {
 };
 
 async function postResult(body: string): Promise<void> {
-  if (EVENT !== "pull_request") return postComment(body);
-  const review = await Deno.readTextFile(REVIEW_PATH).catch(() => {
-    throw new Error(`no review was written to ${REVIEW_PATH}`);
-  });
+  const review = await Deno.readTextFile(REVIEW_PATH).catch(() => null);
+  if (review === null) {
+    if (EVENT === "pull_request") {
+      throw new Error(`no review was written to ${REVIEW_PATH}`);
+    }
+    return postComment(body);
+  }
   const [verdict, ...rest] = review.split("\n");
   const [event, mark] = VERDICTS[verdict.trim()] ?? ["COMMENT", "💬"];
   await gitea(REVIEWER_TOKEN, `repos/${REPO}/pulls/${INDEX}/reviews`, {