CurbGet started
Changelog

Changelog

All notable changes to Curb. Curb uses semantic versioning. Version numbers can skip: only released versions are listed.

Some 1.x releases made breaking changes without a major version. Each one is listed under Breaking.

1.14.1 (2026-10-29)

Fixed

  • An agent no longer reads a stage direction aloud.

1.13.2 (2026-10-29)

Added

  • A framed preview asks the page that framed it to offer an MCP sign-in.

Fixed

  • A cold preview in curb dev loads 136 files instead of 511.

1.12.10 (2026-10-28)

Added

  • curb conversations prints a project’s recorded conversations with every tool call.
  • curb deploy --json prints the result as one JSON line.
  • curb deploy accepts a host-issued token through CURB_PLATFORM_TOKEN_FILE.
  • curb dev can take each call’s room from CURB_REALTIME_SESSION_URL.
  • Curb runs on the model key a hosted workspace supplies.
  • The preview picks the microphone before a call and explains a blocked one.
  • The preview’s context column folds away.

Fixed

  • The live transcript stays steady while someone speaks.
  • A new project carries no .npmrc, which hosted builds refuse.
  • A new project installs quietly, and its agent introduces itself once.

1.11.9 (2026-10-26)

Breaking

  • An agent without an llm prop runs on kugelaudio.llm() and needs KUGELAUDIO_API_KEY.
  • DEFAULT_ANTHROPIC_MODEL is removed. DEFAULT_KUGELAUDIO_LLM_MODEL names the new default.

Added

  • kugelaudio.llm() runs an agent on KugelAudio’s EU-hosted LLM.
  • npm create kugelaudio creates a Curb project.
  • create-curb-app asks nothing and starts on KugelAudio.
  • npx curb login replaces the key in .env for a KugelAudio project.

Fixed

  • end_call hangs up on a voicemail menu, and the model learns when a hang-up was cancelled.
  • A hosted runner warms up without the LLM key and checks it when a call takes the agent.
  • A first run without keys or hosted access gets its next step from Curb.

1.10.1 (2026-10-26)

Added

  • A transferred caller hears the agent’s announcement, then a ringback tone, instead of silence.

1.9.0 (2026-10-25)

Added

  • useTransferCall() and <TransferCallTool> transfer a hosted phone call.

1.8.0 (2026-10-25)

Added

  • defineAgent({ goals, experiments }) declares goals and A/B experiments, and useVariant() reads a call’s variant.

1.7.3 (2026-10-25)

Added

  • An agent reads who placed the call from call.direction.

1.7.2 (2026-10-25)

Added

  • openaiCompatible() takes reasoningEffort, temperature, topP and body.
  • New projects register the KugelAudio MCP servers in .mcp.json.

Fixed

  • A skill in the preview’s Context column looks like something you can open.

1.6.1 (2026-10-25)

Fixed

  • The quickstart installs curb/create-curb-app.tgz, which no machine has kept from an older release.

1.6.0 (2026-10-25)

Added

  • curb check warns AGENT_LITERAL_DATE when text the model reads hard-codes a date.

Fixed

  • A create-curb-app that npx kept from an earlier run hands over to the newest release.

1.5.0 (2026-10-25)

Added

  • <Tool tryWith> fills the preview’s Try form with demo input the model never sees.

Fixed

  • The preview’s graph opens large from a Graph button.
  • The preview’s dialogs keep their content while they close.

1.4.33 (2026-10-24)

Breaking

  • Conversations start at your agent and skills open only when needed. curb check names what an older project moves.
  • <Agent> renders the skills a conversation opens. A leftover <AgentRouter> renders nothing and warns AGENT_ROUTER_REMOVED.
  • DEFAULT_KUGEL_VOICE_ID is removed. kugelaudio.tts() speaks with the default voice of its language.

Added

  • curb test runs conversation scenarios headlessly, scripted or with a simulated caller.
  • curb say runs caller turns headlessly.
  • curb test and curb say fake a tool’s onSubmit.
  • curb check type-checks the project and lists the variables an agent needs, without their values.
  • <Tool confirm> runs an action only after the caller says yes.
  • firstTurn: { say } opens every conversation with exact words.
  • useClient() reads what the caller’s page sent.
  • kugelaudio.stt() hears callers with Kugel Ear 1, and new projects use it.
  • A tool’s schema reaches the model whole: lists, nested objects and nullables work.
  • A German agent speaks with a German voice by default.
  • One voice session runs every route, with caller info, call identity and an uninterruptible greeting.
  • Agents call tools silently, know today’s date and fall back in their own language.
  • The preview shows your conversation beside your agent’s context, with a skills tree and a live graph.

Fixed

  • curb dev runs saved code within seconds, on the same conversation, without running its tools again.
  • curb dev reloads only for a file that really changed.
  • A voice agent ending a call always says its goodbye.
  • On a voice call, a confirm action runs only after its read-back played in full.
  • The model sees a tool field’s description after .optional() and an enum’s allowed values.
  • curb test runs every scenario a file exports.
  • curb build and create-curb-app work again with @livekit/agents 1.9.4.
  • The preview opens for an agent whose skills import node:crypto or read process.env.

1.3.10 (2026-10-21)

Breaking

  • Curb requires Node 22.12 or newer.

Fixed

  • Kugel TTS retries a turn refused by the concurrent generation limit instead of going silent.
  • Dependency advisories are cleared.

1.3.6 (2026-10-20)

Fixed

  • A project made by create-curb-app deploys, because it ships no symlink.

1.3.4 (2026-10-20)

Added

  • curb login, curb logout, curb deploy and curb secrets push ship a local agent to KugelAudio hosting.
  • Calls sharing one managed runner get their own id, scratch directory and slot.

Fixed

  • curb build verification bundles with esbuild 0.28.2.

1.2.6 (2026-10-14)

Breaking

  • Providers are props. <Agent llm stt tts> and <Skill> take descriptors from curb/providers, and the environment holds keys only.
  • App messages replace the host channel. useHost and useHostMessage are removed; use useSend() and useMessage().
  • curb dev is no longer a host.

Added

  • <Agent adjustable> lets the caller’s app and the host change settings during a call.
  • curb/client connects a browser app to an agent.
  • Provider props are live: a change swaps the speech provider or LLM mid-call.
  • kugel-3.5 is the default TTS model on hosted agents.

Fixed

  • curb build ships undici.

Performance

  • Voice runners take caller audio at 16 kHz and merge frames in linear time.

1.1.0 (2026-10-01)

Added

  • Host protocol v1, and a self-hostable Curb.

Fixed

  • A turn stays alive through tool and LLM failures.
  • A restored runner never blocks on a checkpoint.
  • The Azure Speech region has a default.

Performance

  • Faster hosted builds and warm calls.
  • Shorter reply delays.

1.0.0 (2026-07-26)

Breaking

  • One branching model, with an agent graph in the preview and author-settable icons.

0.3.0 (2026-07-20)

Added

  • Editable voice orchestration and context controls.

0.2.0 (2026-07-17)

Added

  • Conversation history and call replay are restored.

0.1.2 (2026-07-14)

Added

  • First release: a React agent framework with one conversation for chat and voice, a CDN scaffold and curb upgrade.