feat(prd-6): verify workflow triggers and add assignee_trigger (#13)

src/github/context.ts

@@ -60,6 +60,18 @@ const ENTITY_EVENT_NAMES = [
   "pull_request_review_comment",
 ] as const;
 
+/**
+ * Forgejo uses different event names for some webhook events.
+ * Normalize to GitHub-canonical names so all downstream code works unchanged.
+ */
+const FORGEJO_EVENT_NAME_MAP: Record<string, string> = {
+  pull_request_comment: "pull_request_review_comment",
+};
+
+function normalizeEventName(eventName: string): string {
+  return FORGEJO_EVENT_NAME_MAP[eventName] ?? eventName;
+}
+
 const AUTOMATION_EVENT_NAMES = [
   "workflow_dispatch",
   "repository_dispatch",
@@ -132,6 +144,8 @@ export type GitHubContext = ParsedGitHubContext | AutomationContext;
 
 export function parseGitHubContext(): GitHubContext {
   const context = github.context;
+  // Normalize Forgejo event names to GitHub-canonical equivalents
+  const eventName = normalizeEventName(context.eventName);
 
   const commonFields = {
     runId: process.env.GITHUB_RUN_ID!,
@@ -165,7 +179,7 @@ export function parseGitHubContext(): GitHubContext {
     },
   };
 
-  switch (context.eventName) {
+  switch (eventName) {
     case "issues": {
       const payload = context.payload as IssuesEvent;
       return {

src/github/utils/image-downloader.ts

@@ -2,6 +2,15 @@ import fs from "fs/promises";
 import path from "path";
 import type { Octokits } from "../api/client";
 
+// Mutable fs reference for cross-platform test compatibility.
+// On Linux, Bun gives test and source files different fs/promises objects,
+// so spyOn(fs, "mkdir") in a test file won't intercept calls here.
+// Tests override these methods directly instead.
+export const _fsForTest = {
+  mkdir: fs.mkdir.bind(fs),
+  writeFile: fs.writeFile.bind(fs),
+};
+
 // Build regexes at call time, reading GITHUB_SERVER_URL from process.env
 // directly. The config.ts export freezes the value at module load time,
 // which can be wrong when the Forgejo CI runner injects its own
@@ -67,7 +76,7 @@ export async function downloadCommentImages(
   const urlToPathMap = new Map<string, string>();
   const downloadsDir = "/tmp/github-images";
 
-  await fs.mkdir(downloadsDir, { recursive: true });
+  await _fsForTest.mkdir(downloadsDir, { recursive: true });
 
   const { imageRegex, htmlImgRegex } = buildImageRegexes();
 
@@ -217,7 +226,7 @@ export async function downloadCommentImages(
           const arrayBuffer = await imageResponse.arrayBuffer();
           const buffer = Buffer.from(arrayBuffer);
 
-          await fs.writeFile(localPath, buffer);
+          await _fsForTest.writeFile(localPath, buffer);
           console.log(`✓ Saved: ${localPath}`);
 
           urlToPathMap.set(originalUrl, localPath);