Load Superpowers review instructions

superpowers.ts

@@ -1,3 +1,5 @@
+import { join } from "jsr:@std/path@1";
+
 export type BotType = "claude" | "codex";
 
 export type InstallCommand = {
@@ -5,6 +7,24 @@ export type InstallCommand = {
   args: string[];
 };
 
+export type SuperpowersReviewGuide = {
+  version: string;
+  skillPath: string;
+  templatePath: string;
+  skill: string;
+  template: string;
+};
+
+export type SuperpowersFileSystem = {
+  readDir(path: string): AsyncIterable<Deno.DirEntry>;
+  readTextFile(path: string): Promise<string>;
+};
+
+const systemFileSystem: SuperpowersFileSystem = {
+  readDir: Deno.readDir,
+  readTextFile: Deno.readTextFile,
+};
+
 export function parseBotType(value: string): BotType {
   if (value === "claude" || value === "codex") return value;
   throw new Error(`unsupported bot type: ${value}`);
@@ -40,3 +60,88 @@ export function superpowersInstallCommands(
     args: ["plugin", "add", "superpowers@openai-curated-remote"],
   }];
 }
+
+type Candidate = SuperpowersReviewGuide & { directory: string };
+
+async function readCandidate(
+  directory: string,
+  fileSystem: SuperpowersFileSystem,
+): Promise<Candidate | null> {
+  if (!directory.split(/[\\/]/).includes("superpowers")) return null;
+  const skillPath = join(directory, "SKILL.md");
+  const templatePath = join(directory, "code-reviewer.md");
+  try {
+    const [skill, template] = await Promise.all([
+      fileSystem.readTextFile(skillPath),
+      fileSystem.readTextFile(templatePath),
+    ]);
+    return {
+      directory,
+      version: directory.split(/[\\/]/).at(-3) ?? "unknown",
+      skillPath,
+      templatePath,
+      skill,
+      template,
+    };
+  } catch (error) {
+    if (error instanceof Deno.errors.NotFound) return null;
+    throw error;
+  }
+}
+
+async function findCandidates(
+  directory: string,
+  candidates: Candidate[],
+  fileSystem: SuperpowersFileSystem,
+): Promise<void> {
+  let entries: Deno.DirEntry[];
+  try {
+    entries = [];
+    for await (const entry of fileSystem.readDir(directory)) {
+      entries.push(entry);
+    }
+  } catch (error) {
+    if (error instanceof Deno.errors.NotFound) return;
+    throw error;
+  }
+  for (const entry of entries) {
+    if (!entry.isDirectory) continue;
+    const child = join(directory, entry.name);
+    if (entry.name === "requesting-code-review") {
+      const candidate = await readCandidate(child, fileSystem);
+      if (candidate !== null) candidates.push(candidate);
+    } else {
+      await findCandidates(child, candidates, fileSystem);
+    }
+  }
+}
+
+// Load the installed files rather than trusting skill discovery in a later
+// non-interactive agent process. The newest cached plugin version is the one
+// the installers activate, and the exact paths are reported by the caller.
+export async function loadSuperpowersReviewGuide(
+  bot: BotType,
+  home: string,
+  fileSystem: SuperpowersFileSystem = systemFileSystem,
+): Promise<SuperpowersReviewGuide> {
+  const root = join(
+    home,
+    bot === "codex" ? ".codex" : ".claude",
+    "plugins",
+    "cache",
+  );
+  const candidates: Candidate[] = [];
+  await findCandidates(root, candidates, fileSystem);
+  candidates.sort((left, right) =>
+    left.version.localeCompare(right.version, undefined, { numeric: true }) ||
+    left.directory.localeCompare(right.directory)
+  );
+  const guide = candidates.at(-1);
+  if (guide === undefined) {
+    throw new Error(
+      `installed Superpowers requesting-code-review files not found under ${root}`,
+    );
+  }
+  const { directory: _, ...result } = guide;
+  return result;
+}