rivet-dev · abcxff · Mar 30, 2026 · Mar 30, 2026
diff --git a/Cargo.toml b/Cargo.toml
@@ -4,7 +4,7 @@ members = ["server/packages/*", "gigacode"]
 exclude = ["factory/packages/desktop/src-tauri", "foundry/packages/desktop/src-tauri"]
 
 [workspace.package]
-version = "0.4.2"
+version = "0.5.0-rc.3"
 edition = "2021"
 authors = [ "Rivet Gaming, LLC <developer@rivet.gg>" ]
 license = "Apache-2.0"
@@ -13,13 +13,13 @@ description = "Universal API for automatic coding agents in sandboxes. Supports
 
 [workspace.dependencies]
 # Internal crates
-sandbox-agent = { version = "0.4.2", path = "server/packages/sandbox-agent" }
-sandbox-agent-error = { version = "0.4.2", path = "server/packages/error" }
-sandbox-agent-agent-management = { version = "0.4.2", path = "server/packages/agent-management" }
-sandbox-agent-agent-credentials = { version = "0.4.2", path = "server/packages/agent-credentials" }
-sandbox-agent-opencode-adapter = { version = "0.4.2", path = "server/packages/opencode-adapter" }
-sandbox-agent-opencode-server-manager = { version = "0.4.2", path = "server/packages/opencode-server-manager" }
-acp-http-adapter = { version = "0.4.2", path = "server/packages/acp-http-adapter" }
+sandbox-agent = { version = "0.5.0-rc.3", path = "server/packages/sandbox-agent" }
+sandbox-agent-error = { version = "0.5.0-rc.3", path = "server/packages/error" }
+sandbox-agent-agent-management = { version = "0.5.0-rc.3", path = "server/packages/agent-management" }
+sandbox-agent-agent-credentials = { version = "0.5.0-rc.3", path = "server/packages/agent-credentials" }
+sandbox-agent-opencode-adapter = { version = "0.5.0-rc.3", path = "server/packages/opencode-adapter" }
+sandbox-agent-opencode-server-manager = { version = "0.5.0-rc.3", path = "server/packages/opencode-server-manager" }
+acp-http-adapter = { version = "0.5.0-rc.3", path = "server/packages/acp-http-adapter" }
 
 # Serialization
 serde = { version = "1.0", features = ["derive"] }

diff --git a/sdks/acp-http-client/package.json b/sdks/acp-http-client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "acp-http-client",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "Protocol-faithful ACP JSON-RPC over streamable HTTP client.",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/cli-shared/package.json b/sdks/cli-shared/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/cli-shared",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "Shared helpers for sandbox-agent CLI and SDK",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/cli/package.json b/sdks/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/cli",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "CLI for sandbox-agent - run AI coding agents in sandboxes",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/cli/platforms/darwin-arm64/package.json b/sdks/cli/platforms/darwin-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/cli-darwin-arm64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "sandbox-agent CLI binary for macOS ARM64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/cli/platforms/darwin-x64/package.json b/sdks/cli/platforms/darwin-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/cli-darwin-x64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "sandbox-agent CLI binary for macOS x64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/cli/platforms/linux-arm64/package.json b/sdks/cli/platforms/linux-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/cli-linux-arm64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "sandbox-agent CLI binary for Linux arm64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/cli/platforms/linux-x64/package.json b/sdks/cli/platforms/linux-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/cli-linux-x64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "sandbox-agent CLI binary for Linux x64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/cli/platforms/win32-x64/package.json b/sdks/cli/platforms/win32-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/cli-win32-x64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "sandbox-agent CLI binary for Windows x64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/gigacode/package.json b/sdks/gigacode/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/gigacode",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "Gigacode CLI (sandbox-agent with OpenCode attach by default)",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/gigacode/platforms/darwin-arm64/package.json b/sdks/gigacode/platforms/darwin-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/gigacode-darwin-arm64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "gigacode CLI binary for macOS arm64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/gigacode/platforms/darwin-x64/package.json b/sdks/gigacode/platforms/darwin-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/gigacode-darwin-x64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "gigacode CLI binary for macOS x64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/gigacode/platforms/linux-arm64/package.json b/sdks/gigacode/platforms/linux-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/gigacode-linux-arm64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "gigacode CLI binary for Linux arm64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/gigacode/platforms/linux-x64/package.json b/sdks/gigacode/platforms/linux-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/gigacode-linux-x64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "gigacode CLI binary for Linux x64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/gigacode/platforms/win32-x64/package.json b/sdks/gigacode/platforms/win32-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/gigacode-win32-x64",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "gigacode CLI binary for Windows x64",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/persist-indexeddb/package.json b/sdks/persist-indexeddb/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/persist-indexeddb",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "IndexedDB persistence driver for the Sandbox Agent TypeScript SDK (DEPRECATED)",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/persist-postgres/package.json b/sdks/persist-postgres/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/persist-postgres",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "PostgreSQL persistence driver for the Sandbox Agent TypeScript SDK (DEPRECATED)",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/persist-rivet/package.json b/sdks/persist-rivet/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/persist-rivet",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "Rivet Actor persistence driver for the Sandbox Agent TypeScript SDK (DEPRECATED)",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/persist-sqlite/package.json b/sdks/persist-sqlite/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/persist-sqlite",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "SQLite persistence driver for the Sandbox Agent TypeScript SDK (DEPRECATED)",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/react/package.json b/sdks/react/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sandbox-agent/react",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "React components for Sandbox Agent frontend integrations",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/typescript/package.json b/sdks/typescript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sandbox-agent",
-  "version": "0.4.2",
+  "version": "0.5.0-rc.3",
   "description": "Universal API for automatic coding agents in sandboxes. Supports Claude Code, Codex, OpenCode, and Amp.",
   "license": "Apache-2.0",
   "repository": {

diff --git a/sdks/typescript/src/client.ts b/sdks/typescript/src/client.ts
@@ -609,7 +609,9 @@ export class LiveAcpConnection {
       if (replayText) {
         // TODO: Replace this synthesized replay text with ACP-native restore once standardized.
         this.pendingReplayByLocalSessionId.delete(localSessionId);
-        injectReplayPrompt(mappedParams, replayText);
+        prefixPromptText(mappedParams, replayText);
+      } else {
+        prefixPromptText(mappedParams, "msg:");
       }
 
       if (options.notification) {
@@ -2686,12 +2688,29 @@ function mapSessionParams(params: Record<string, unknown>, agentSessionId: strin
   };
 }
 
-function injectReplayPrompt(params: Record<string, unknown>, replayText: string): void {
+function prefixPromptText(params: Record<string, unknown>, prefix: string): void {
   const prompt = Array.isArray(params.prompt) ? [...params.prompt] : [];
-  prompt.unshift({
-    type: "text",
-    text: replayText,
-  });
+  let prefixed = false;
+
+  for (let i = 0; i < prompt.length; i += 1) {
+    const part = prompt[i];
+    if (isRecord(part) && part.type === "text" && typeof part.text === "string") {
+      prompt[i] = {
+        ...part,
+        text: `${prefix}${part.text}`,
+      };
+      prefixed = true;
+      break;
+    }
+  }
+
+  if (!prefixed) {
+    prompt.unshift({
+      type: "text",
+      text: prefix,
+    });
+  }
+
   params.prompt = prompt;
 }
 
@@ -2700,25 +2719,16 @@ function buildReplayText(events: SessionEvent[], maxChars: number): string | nul
     return null;
   }
 
-  const prefix = "Previous session history is replayed below as JSON-RPC envelopes. Use it as context before responding to the latest user prompt.\n";
-  let text = prefix;
-
-  for (const event of events) {
-    const line = JSON.stringify({
-      createdAt: event.createdAt,
-      sender: event.sender,
-      payload: event.payload,
-    });
-
-    if (text.length + line.length + 1 > maxChars) {
-      text += "\n[history truncated]";
-      break;
+  let start = 0;
+  while (start < events.length) {
+    const json = JSON.stringify(events.slice(start));
+    if (json.length <= maxChars) {
+      return `restore-history:${json.length}:${json}`;
     }
-
-    text += `${line}\n`;
+    start += 1;
   }
 
-  return text;
+  return null;
 }
 
 function envelopeMethod(message: AnyMessage): string | null {

diff --git a/sdks/typescript/tests/integration.test.ts b/sdks/typescript/tests/integration.test.ts
@@ -538,7 +538,7 @@ describe("Integration: TypeScript SDK flat session API", () => {
       const params = payload.params as Record<string, unknown> | undefined;
       const prompt = Array.isArray(params?.prompt) ? params?.prompt : [];
       const firstBlock = prompt[0] as Record<string, unknown> | undefined;
-      return method === "session/prompt" && typeof firstBlock?.text === "string" && firstBlock.text.includes("Previous session history is replayed below");
+      return method === "session/prompt" && typeof firstBlock?.text === "string" && firstBlock.text.startsWith("restore-history:");
     });
 
     expect(replayInjected).toBeTruthy();