Review on request

The review file starts with `Approved` or `Changes requested` instead of `Yes`/`No`/`With fixes`. The match is still the whole trimmed first line; `run.ts` prepends ✅, 🛑, or 💬 when posting, so the mark never takes part in the match.

Verified: `deno fmt`, `deno lint`, `deno check` pass; a scratch run of the matcher maps `Approved` → APPROVED, `Changes requested` → REQUEST_CHANGES, and `Approved, mostly`, `✅ Approved`, `Yes` → COMMENT.
Reviewed-on: #8
Co-authored-by: Danny Kim <temeddix@gmail.com>
Co-committed-by: Danny Kim <temeddix@gmail.com>

prompt.md

@@ -18,7 +18,8 @@ the head of the pull request when there is one, with full history and the
 author's push credentials. Read the code there, run its checks and tests when
 they bear on the task, and push from there.
 
-For a `pull_request` event, review the PR without changing code, using the
+For a `pull_request` event, and for a comment on a pull request that asks you to
+review it, review the PR without changing code, using the
 `requesting-code-review` skill from superpowers: run its code reviewer template
 against the PR's base and head. Run the project's checks on the head and treat a
 failure as at least Important. Check the whole repository against the code rules

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
+// A review is posted whenever the agent wrote one, whether a review request or
-// of the response. It comes through a file, because a final chat message picks
+// a comment asked for it. It comes through a file, because a final chat message
-// up narration while a file's first line is written on purpose. That line is
+// picks up narration while a file's first line is written on purpose. That line
-// the verdict, matched whole; anything unexpected only comments, never
+// 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(() => null);
-  const review = await Deno.readTextFile(REVIEW_PATH).catch(() => {
+  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`, {