OPC # 0001: Extract OPC into standalone repo

Co-authored-by: Copilot <copilot@github.com>

clarity.controlplane/src/api/opcApi.ts

@@ -114,6 +114,7 @@ export async function deleteArtifact(artifactId: string): Promise<void> {
 // The git log endpoint supports ?grep=OPC+%230001 to filter.
 
 export interface LinkedCommit {
+  repoKey:   string;
   hash:      string;
   shortHash: string;
   author:    string;
@@ -123,9 +124,9 @@ export interface LinkedCommit {
 }
 
 export async function getLinkedCommits(opcNumber: string): Promise<LinkedCommit[]> {
-  const res = await fetch(`${BASE_URL}/api/git/log?grep=${encodeURIComponent(opcNumber)}&limit=50`);
+  const res = await fetch(`${BASE_URL}/api/git/log?grep=${encodeURIComponent(opcNumber)}&limit=50&repo=all`);
   if (!res.ok) throw new Error(`Failed to load commits: ${res.statusText}`);
-  return res.json();
+  return res.json(); // backend now returns { repoKey, hash, shortHash, author, date, subject, files }
 }
 
 // ── Pinned commits ────────────────────────────────────────────────────────────
@@ -192,6 +193,17 @@ export async function getBranchCoverage(hashes: string[]): Promise<BranchCoverag
   return res.json();
 }
 
+// Query branch coverage against a specific repo from the Git:Repos registry.
+// The backend ignores hashes it cannot resolve, so passing cross-repo hashes is safe.
+export async function getBranchCoverageForRepo(repoKey: string, hashes: string[]): Promise<BranchCoverage[]> {
+  if (hashes.length === 0) return [];
+  const res = await fetch(
+    `${BASE_URL}/api/git/branch-coverage?commits=${hashes.join(',')}&repo=${encodeURIComponent(repoKey)}`,
+  );
+  if (!res.ok) throw new Error(`Failed to get branch coverage for ${repoKey}: ${res.statusText}`);
+  return res.json();
+}
+
 // ── Commit detail (full diff) ─────────────────────────────────────────────────
 
 export interface CommitFile {