fix: correct /data API usage and data format for importing share URLs

packages/opencode/src/cli/cmd/import.ts

@@ -1,17 +1,73 @@
 import type { Argv } from "yargs"
+import type { Session as SDKSession, Message, Part } from "@opencode-ai/sdk/v2"
 import { Session } from "../../session"
 import { cmd } from "./cmd"
 import { bootstrap } from "../bootstrap"
 import { Storage } from "../../storage/storage"
 import { Instance } from "../../project/instance"
+import { ShareNext } from "../../share/share-next"
 import { EOL } from "os"
 
+/** Discriminated union returned by the ShareNext API (GET /api/share/:id/data) */
+export type ShareData =
+  | { type: "session"; data: SDKSession }
+  | { type: "message"; data: Message }
+  | { type: "part"; data: Part }
+  | { type: "session_diff"; data: unknown }
+  | { type: "model"; data: unknown }
+
+/** Extract share ID from a share URL like https://opncd.ai/share/abc123 */
+export function parseShareUrl(url: string): string | null {
+  const match = url.match(/^https?:\/\/[^/]+\/share\/([a-zA-Z0-9_-]+)$/)
+  return match ? match[1] : null
+}
+
+/**
+ * Transform ShareNext API response (flat array) into the nested structure for local file storage.
+ *
+ * The API returns a flat array: [session, message, message, part, part, ...]
+ * Local storage expects: { info: session, messages: [{ info: message, parts: [part, ...] }, ...] }
+ *
+ * This groups parts by their messageID to reconstruct the hierarchy before writing to disk.
+ */
+export function transformShareData(shareData: ShareData[]): {
+  info: SDKSession
+  messages: Array<{ info: Message; parts: Part[] }>
+} | null {
+  const sessionItem = shareData.find((d) => d.type === "session")
+  if (!sessionItem) return null
+
+  const messageMap = new Map<string, Message>()
+  const partMap = new Map<string, Part[]>()
+
+  for (const item of shareData) {
+    if (item.type === "message") {
+      messageMap.set(item.data.id, item.data)
+    } else if (item.type === "part") {
+      if (!partMap.has(item.data.messageID)) {
+        partMap.set(item.data.messageID, [])
+      }
+      partMap.get(item.data.messageID)!.push(item.data)
+    }
+  }
+
+  if (messageMap.size === 0) return null
+
+  return {
+    info: sessionItem.data,
+    messages: Array.from(messageMap.values()).map((msg) => ({
+      info: msg,
+      parts: partMap.get(msg.id) ?? [],
+    })),
+  }
+}
+
 export const ImportCommand = cmd({
   command: "import <file>",
   describe: "import session data from JSON file or URL",
   builder: (yargs: Argv) => {
     return yargs.positional("file", {
-      describe: "path to JSON file or opencode.ai share URL",
+      describe: "path to JSON file or share URL",
       type: "string",
       demandOption: true,
     })
@@ -22,49 +78,42 @@ export const ImportCommand = cmd({
         | {
             info: Session.Info
             messages: Array<{
-              info: any
-              parts: any[]
+              info: Message
+              parts: Part[]
             }>
           }
         | undefined
 
       const isUrl = args.file.startsWith("http://") || args.file.startsWith("https://")
 
       if (isUrl) {
-        const urlMatch = args.file.match(/https?:\/\/opncd\.ai\/share\/([a-zA-Z0-9_-]+)/)
-        if (!urlMatch) {
-          process.stdout.write(`Invalid URL format. Expected: https://opncd.ai/share/<slug>`)
+        const slug = parseShareUrl(args.file)
+        if (!slug) {
+          const baseUrl = await ShareNext.url()
+          process.stdout.write(`Invalid URL format. Expected: ${baseUrl}/share/<slug>`)
           process.stdout.write(EOL)
           return
         }
 
-        const slug = urlMatch[1]
-        const response = await fetch(`https://opncd.ai/api/share/${slug}`)
+        const baseUrl = await ShareNext.url()
+        const response = await fetch(`${baseUrl}/api/share/${slug}/data`)
 
         if (!response.ok) {
           process.stdout.write(`Failed to fetch share data: ${response.statusText}`)
           process.stdout.write(EOL)
           return
         }
 
-        const data = await response.json()
+        const shareData: ShareData[] = await response.json()
+        const transformed = transformShareData(shareData)
 
-        if (!data.info || !data.messages || Object.keys(data.messages).length === 0) {
-          process.stdout.write(`Share not found: ${slug}`)
+        if (!transformed) {
+          process.stdout.write(`Share not found or empty: ${slug}`)
           process.stdout.write(EOL)
           return
         }
 
-        exportData = {
-          info: data.info,
-          messages: Object.values(data.messages).map((msg: any) => {
-            const { parts, ...info } = msg
-            return {
-              info,
-              parts,
-            }
-          }),
-        }
+        exportData = transformed
       } else {
         const file = Bun.file(args.file)
         exportData = await file.json().catch(() => {})

packages/opencode/src/share/share-next.ts

@@ -11,7 +11,7 @@ import type * as SDK from "@opencode-ai/sdk/v2"
 export namespace ShareNext {
   const log = Log.create({ service: "share-next" })
 
-  async function url() {
+  export async function url() {
     return Config.get().then((x) => x.enterprise?.url ?? "https://opncd.ai")
   }
 

packages/opencode/test/cli/import.test.ts

@@ -0,0 +1,38 @@
+import { test, expect } from "bun:test"
+import { parseShareUrl, transformShareData, type ShareData } from "../../src/cli/cmd/import"
+
+// parseShareUrl tests
+test("parses valid share URLs", () => {
+  expect(parseShareUrl("https://opncd.ai/share/Jsj3hNIW")).toBe("Jsj3hNIW")
+  expect(parseShareUrl("https://custom.example.com/share/abc123")).toBe("abc123")
+  expect(parseShareUrl("http://localhost:3000/share/test_id-123")).toBe("test_id-123")
+})
+
+test("rejects invalid URLs", () => {
+  expect(parseShareUrl("https://opncd.ai/s/Jsj3hNIW")).toBeNull() // legacy format
+  expect(parseShareUrl("https://opncd.ai/share/")).toBeNull()
+  expect(parseShareUrl("https://opncd.ai/share/id/extra")).toBeNull()
+  expect(parseShareUrl("not-a-url")).toBeNull()
+})
+
+// transformShareData tests
+test("transforms share data to storage format", () => {
+  const data: ShareData[] = [
+    { type: "session", data: { id: "sess-1", title: "Test" } as any },
+    { type: "message", data: { id: "msg-1", sessionID: "sess-1" } as any },
+    { type: "part", data: { id: "part-1", messageID: "msg-1" } as any },
+    { type: "part", data: { id: "part-2", messageID: "msg-1" } as any },
+  ]
+
+  const result = transformShareData(data)!
+
+  expect(result.info.id).toBe("sess-1")
+  expect(result.messages).toHaveLength(1)
+  expect(result.messages[0].parts).toHaveLength(2)
+})
+
+test("returns null for invalid share data", () => {
+  expect(transformShareData([])).toBeNull()
+  expect(transformShareData([{ type: "message", data: {} as any }])).toBeNull()
+  expect(transformShareData([{ type: "session", data: { id: "s" } as any }])).toBeNull() // no messages
+})