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feat: add OpenClaw SDK package

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Peter Steinberger
2026-04-29 21:43:28 +01:00
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---
summary: "Reference design for the proposed public OpenClaw app SDK API, event taxonomy, artifacts, approvals, and package structure"
title: "OpenClaw SDK API design"
read_when:
- You are implementing the proposed public OpenClaw app SDK
- You need the draft namespace, event, result, artifact, approval, or security contract for the app SDK
- You are comparing Gateway protocol resources with the high-level OpenClaw SDK wrapper
---
This page is the detailed API reference design for the proposed public
[OpenClaw SDK](/concepts/openclaw-sdk). It is intentionally separate from the
[plugin SDK](/plugins/sdk-overview).
The public app SDK should be built in two layers:
1. A low-level generated Gateway client.
2. A high-level ergonomic wrapper with `OpenClaw`, `Agent`, `Session`, `Run`,
`Task`, `Artifact`, `Approval`, and `Environment` objects.
## Namespace design
The low-level namespaces should closely follow Gateway resources:
```typescript
oc.agents.list();
oc.agents.get("main");
oc.agents.create(...);
oc.agents.update(...);
oc.sessions.list();
oc.sessions.create(...);
oc.sessions.resolve(...);
oc.sessions.send(...);
oc.sessions.messages(...);
oc.sessions.fork(...);
oc.sessions.compact(...);
oc.sessions.abort(...);
oc.runs.create(...);
oc.runs.get(runId);
oc.runs.events(runId, { after });
oc.runs.wait(runId);
oc.runs.cancel(runId);
oc.tasks.list(); // future API: current SDK throws unsupported
oc.tasks.get(taskId); // future API: current SDK throws unsupported
oc.tasks.cancel(taskId); // future API: current SDK throws unsupported
oc.tasks.events(taskId, { after }); // future API
oc.models.list();
oc.models.status(); // Gateway models.authStatus
oc.tools.list();
oc.tools.invoke(...); // future API: current SDK throws unsupported
oc.artifacts.list({ runId }); // future API: current SDK throws unsupported
oc.artifacts.get(artifactId); // future API: current SDK throws unsupported
oc.artifacts.download(artifactId); // future API: current SDK throws unsupported
oc.approvals.list();
oc.approvals.respond(approvalId, ...);
oc.environments.list(); // future API: current SDK throws unsupported
oc.environments.create(...); // future API: current SDK throws unsupported
oc.environments.status(environmentId); // future API: current SDK throws unsupported
oc.environments.delete(environmentId); // future API: current SDK throws unsupported
```
High-level wrappers should return objects that make common flows pleasant:
```typescript
const run = await agent.run(inputOrParams);
await run.cancel();
await run.wait();
for await (const event of run.events()) {
// normalized event stream
}
const artifacts = await run.artifacts.list();
const session = await run.session();
```
## Event contract
The public SDK should expose versioned, replayable, normalized events.
```typescript
type OpenClawEvent = {
version: 1;
id: string;
ts: number;
type: OpenClawEventType;
runId?: string;
sessionId?: string;
sessionKey?: string;
taskId?: string;
agentId?: string;
data: unknown;
raw?: unknown;
};
```
`id` is a replay cursor. Consumers should be able to reconnect with
`events({ after: id })` and receive missed events when retention allows.
Recommended normalized event families:
| Event | Meaning |
| --------------------- | ----------------------------------------------------------- |
| `run.created` | Run accepted. |
| `run.queued` | Run is waiting for a session lane, runtime, or environment. |
| `run.started` | Runtime started execution. |
| `run.completed` | Run finished successfully. |
| `run.failed` | Run ended with an error. |
| `run.cancelled` | Run was cancelled. |
| `run.timed_out` | Run exceeded its timeout. |
| `assistant.delta` | Assistant text delta. |
| `assistant.message` | Complete assistant message or replacement. |
| `thinking.delta` | Reasoning or plan delta, when policy allows exposure. |
| `tool.call.started` | Tool call began. |
| `tool.call.delta` | Tool call streamed progress or partial output. |
| `tool.call.completed` | Tool call returned successfully. |
| `tool.call.failed` | Tool call failed. |
| `approval.requested` | A run or tool needs approval. |
| `approval.resolved` | Approval was granted, denied, expired, or cancelled. |
| `question.requested` | Runtime asks the user or host app for input. |
| `question.answered` | Host app supplied an answer. |
| `artifact.created` | New artifact available. |
| `artifact.updated` | Existing artifact changed. |
| `session.created` | Session created. |
| `session.updated` | Session metadata changed. |
| `session.compacted` | Session compaction happened. |
| `task.updated` | Background task state changed. |
| `git.branch` | Runtime observed or changed branch state. |
| `git.diff` | Runtime produced or changed a diff. |
| `git.pr` | Runtime opened, updated, or linked a pull request. |
Runtime-native payloads should be available through `raw`, but apps should not
have to parse `raw` for normal UI.
## Result contract
`Run.wait()` should return a stable result envelope:
```typescript
type RunResult = {
runId: string;
status: "completed" | "failed" | "cancelled" | "timed_out";
sessionId?: string;
sessionKey?: string;
taskId?: string;
startedAt?: string | number;
endedAt?: string | number;
output?: {
text?: string;
messages?: SDKMessage[];
};
usage?: {
inputTokens?: number;
outputTokens?: number;
totalTokens?: number;
costUsd?: number;
};
artifacts?: ArtifactSummary[];
error?: SDKError;
};
```
The result should be boring and stable. Timestamp values preserve the Gateway
shape, so current lifecycle-backed runs usually report epoch millisecond
numbers while adapters may still surface ISO strings. Rich UI, tool traces, and
runtime-native details belong in events and artifacts.
## Approvals and questions
Approvals must be first-class because coding agents constantly cross safety
boundaries.
```typescript
run.onApproval(async (request) => {
if (request.kind === "tool" && request.toolName === "exec") {
return request.approveOnce({ reason: "CI command allowed by policy" });
}
return request.askUser();
});
```
Approval events should carry:
- approval id
- run id and session id
- request kind
- requested action summary
- tool name or environment action
- risk level
- available decisions
- expiration
- whether the decision can be reused
Questions are separate from approvals. A question asks the user or host app for
information. An approval asks for permission to perform an action.
## ToolSpace model
Apps need to understand the tool surface without importing plugin internals.
```typescript
const tools = await run.toolSpace();
for (const tool of tools.list()) {
console.log(tool.name, tool.source, tool.requiresApproval);
}
```
The SDK should expose:
- normalized tool metadata
- source: OpenClaw, MCP, plugin, channel, runtime, or app
- schema summary
- approval policy
- runtime compatibility
- whether a tool is hidden, readonly, write capable, or host capable
Tool invocation through the SDK should be explicit and scoped. Most apps should
run agents, not call arbitrary tools directly.
## Artifact model
Artifacts should cover more than files.
```typescript
type ArtifactSummary = {
id: string;
runId?: string;
sessionId?: string;
type:
| "file"
| "patch"
| "diff"
| "log"
| "media"
| "screenshot"
| "trajectory"
| "pull_request"
| "workspace";
title?: string;
mimeType?: string;
sizeBytes?: number;
createdAt: string;
expiresAt?: string;
};
```
Common examples:
- file edits and generated files
- patch bundles
- VCS diffs
- screenshots and media outputs
- logs and trace bundles
- pull request links
- runtime trajectories
- managed environment workspace snapshots
Artifact access should support redaction, retention, and download URLs without
assuming every artifact is a normal local file.
## Security model
The app SDK must be explicit about authority.
Recommended token scopes:
| Scope | Allows |
| ------------------- | --------------------------------------------------- |
| `agent.read` | List and inspect agents. |
| `agent.run` | Start runs. |
| `session.read` | Read session metadata and messages. |
| `session.write` | Create, send to, fork, compact, and abort sessions. |
| `task.read` | Read background task state. |
| `task.write` | Cancel or modify task notification policy. |
| `approval.respond` | Approve or deny requests. |
| `tools.invoke` | Invoke exposed tools directly. |
| `artifacts.read` | List and download artifacts. |
| `environment.write` | Create or destroy managed environments. |
| `admin` | Administrative operations. |
Defaults:
- no secret forwarding by default
- no unrestricted environment variable pass-through
- secret references instead of secret values
- explicit sandbox and network policy
- explicit remote environment retention
- approvals for host execution unless policy proves otherwise
- raw runtime events redacted before they leave Gateway unless the caller has a
stronger diagnostic scope
## Managed environment provider
Managed agents should be implemented as environment providers.
```typescript
type EnvironmentProvider = {
id: string;
capabilities: {
checkout?: boolean;
sandbox?: boolean;
networkPolicy?: boolean;
secrets?: boolean;
artifacts?: boolean;
logs?: boolean;
pullRequests?: boolean;
longRunning?: boolean;
};
};
```
The first implementation does not need to be a hosted SaaS. It can target
existing node hosts, ephemeral workspaces, CI-style runners, or Testbox-style
environments. The important contract is:
1. prepare workspace
2. bind safe environment and secrets
3. start run
4. stream events
5. collect artifacts
6. clean up or retain by policy
Once this is stable, a hosted cloud service can implement the same provider
contract.
## Package structure
Recommended packages:
| Package | Purpose |
| ----------------------- | ------------------------------------------------------------- |
| `@openclaw/sdk` | Public high-level SDK and generated low-level Gateway client. |
| `@openclaw/sdk-react` | Optional React hooks for dashboards and app builders. |
| `@openclaw/sdk-testing` | Test helpers and fake Gateway server for app integrations. |
The repo already has `openclaw/plugin-sdk/*` for plugins. Keep that namespace
separate to avoid confusing plugin authors with app developers.
## Generated client strategy
The low-level client should be generated from versioned Gateway protocol
schemas, then wrapped by handwritten ergonomic classes.
Layering:
1. Gateway schema source of truth.
2. Generated low-level TypeScript client.
3. Runtime validators for external inputs and event payloads.
4. High-level `OpenClaw`, `Agent`, `Session`, `Run`, `Task`, and `Artifact`
wrappers.
5. Cookbook examples and integration tests.
Benefits:
- protocol drift is visible
- tests can compare generated methods with Gateway exports
- app SDK stays independent from plugin SDK internals
- low-level consumers still have full protocol access
- high-level consumers get the small product API
## Related docs
- [OpenClaw SDK design](/concepts/openclaw-sdk)
- [Gateway RPC reference](/reference/rpc)
- [Agent loop](/concepts/agent-loop)
- [Agent runtimes](/concepts/agent-runtimes)
- [Background tasks](/automation/tasks)
- [ACP agents](/tools/acp-agents)
- [Plugin SDK overview](/plugins/sdk-overview)