Slice 3: the PR flow

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/api.js

@@ -197,6 +197,79 @@ export async function resolveThread(slug, branch, threadId) {
   return jsonOrThrow(res)
 }
 
+// ── Slice 3: the §10 PR flow ─────────────────────────────────────────────
+
+export async function draftPRText(slug, branch) {
+  const res = await fetch(
+    `/api/rfcs/${slug}/branches/${encodeURIComponent(branch)}/pr-draft`,
+    { method: 'POST' },
+  )
+  return jsonOrThrow(res)
+}
+
+export async function openPR(slug, branch, { title, description }) {
+  const res = await fetch(
+    `/api/rfcs/${slug}/branches/${encodeURIComponent(branch)}/open-pr`,
+    {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ title, description }),
+    },
+  )
+  return jsonOrThrow(res)
+}
+
+export async function getPR(slug, prNumber) {
+  return jsonOrThrow(await fetch(`/api/rfcs/${slug}/prs/${prNumber}`))
+}
+
+export async function advancePRSeen(slug, prNumber, { lastSeenCommitSha, lastSeenMessageId }) {
+  const res = await fetch(`/api/rfcs/${slug}/prs/${prNumber}/seen`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      last_seen_commit_sha: lastSeenCommitSha,
+      last_seen_message_id: lastSeenMessageId,
+    }),
+  })
+  return jsonOrThrow(res)
+}
+
+export async function postPRReview(slug, prNumber, { text, anchorPayload, quote }) {
+  const res = await fetch(`/api/rfcs/${slug}/prs/${prNumber}/review`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ text, anchor_payload: anchorPayload || {}, quote: quote || null }),
+  })
+  return jsonOrThrow(res)
+}
+
+export async function mergePR(slug, prNumber) {
+  const res = await fetch(`/api/rfcs/${slug}/prs/${prNumber}/merge`, { method: 'POST' })
+  return jsonOrThrow(res)
+}
+
+export async function withdrawPR(slug, prNumber) {
+  const res = await fetch(`/api/rfcs/${slug}/prs/${prNumber}/withdraw`, { method: 'POST' })
+  return jsonOrThrow(res)
+}
+
+export async function editPRDescription(slug, prNumber, { title, description }) {
+  const res = await fetch(`/api/rfcs/${slug}/prs/${prNumber}/description`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ title, description }),
+  })
+  return jsonOrThrow(res)
+}
+
+export async function startResolutionBranch(slug, prNumber) {
+  const res = await fetch(`/api/rfcs/${slug}/prs/${prNumber}/resolution-branch`, {
+    method: 'POST',
+  })
+  return jsonOrThrow(res)
+}
+
 // Stream a chat turn into a per-branch thread. Calls onChunk for each
 // text fragment, onChanges when the trailing `changes` event arrives,
 // and onDone at the terminal DONE marker. Returns the response headers