Meerkat Python SDK
Python SDK for the Meerkat runtime.
- Contract version: the same as the package version (
meerkat.CONTRACT_VERSION) - Python:
>=3.10 - Package:
meerkat-sdk
The SDK is session-first and runtime-backed: it spawns rkat-rpc and exposes typed Python handles (Session, DeferredSession, Mob) over the same canonical JSON-RPC surface used by CLI/REST/MCP.
Install
pip install meerkat-sdk
For local development:
pip install -e "sdks/python[dev]"
Quick start
The selected model needs a compatible credential route: an already provisioned
auth binding or the provider's environment key. This example selects Claude.
For a clean API-key setup, export your Anthropic key in the shell that starts
Python; the rkat-rpc child inherits it:
export ANTHROPIC_API_KEY="<your-anthropic-api-key>"
Skip this export if you already use a compatible auth binding; pass it with
auth_binding when it is not the configured default. A different provider's
key is not a substitute for the selected model's credentials.
import asyncio
from meerkat import MeerkatClient
async def main() -> None:
async with MeerkatClient() as client:
session = await client.create_session(
"What is the capital of France?",
model="claude-sonnet-4-6",
)
print(session.text)
result = await session.turn("And Germany?")
print(result.text)
await session.archive()
asyncio.run(main())
Core API
Session creation
create_session, create_session_streaming, and create_deferred_session support:
- host context and identity:
injected_context,auth_binding, plustransient_turn_contextfor immediate create/stream only - model/provider controls:
model,provider,max_tokens,system_prompt,provider_params - structured output:
output_schema,structured_output_retries - runtime/tool toggles:
enable_builtins,enable_shell,enable_memory,enable_schedule,enable_workgraph,enable_mob,enable_web_search - comms/runtime metadata:
keep_alive,comms_name,peer_meta,budget_limits - skills:
preload_skills,skill_refs - session metadata:
labels - additional session config:
additional_instructions,app_context,shell_env,external_tools
Deferred creation stores injected context for its eventual first turn but does
not accept transient turn context. Pass transient facts to
DeferredSession.start_turn(...).
Session queries
await client.list_sessions(...) -> list[SessionSummary]await client.read_session(session_id) -> SessionDetailsawait client.read_session_history(session_id, offset=0, limit=None) -> SessionHistory
SessionSummary is returned by session/list and includes total_tokens.
SessionDetails is returned by session/read and includes model, provider, and last_assistant_text.
Both use integer unix timestamps for created_at and updated_at.
Session runtime inputs
await client.inject_context(session_id, text, source=..., idempotency_key=...)await session.inject_context(...)await client.send_external_event(session_id, event_type, payload, blocks=None)await session.send_external_event(event_type, payload, blocks=None)
Turns and streaming
Session.turn(...) and Session.stream(...) now expose full turn overrides:
injected_context,transient_turn_contextskill_refs,turn_tool_overlayadditional_instructionskeep_alive,model,provider,self_hosted_server_id,max_tokens,system_promptoutput_schema,structured_output_retries,provider_params
DeferredSession.start_turn(...) supports the same override set.
Config APIs return config write results
get_config returns a ConfigEnvelope:
{
"config": {...},
"generation": 12,
"realm_id": "...",
"instance_id": "...",
"backend": "...",
"resolved_paths": {...} | None,
}
set_config and patch_config return the same envelope fields plus optional
live_propagation when a write fans out to live channels.
Example:
config_envelope = await client.get_config()
updated = await client.patch_config(
{"max_tokens": 2048},
expected_generation=config_envelope["generation"],
)
Additional surfaces
Models catalog
await client.get_models_catalog() -> ModelsCatalogResponse
Schedules
await client.create_schedule(request)await client.get_schedule(schedule_id)await client.list_schedules(labels=None, limit=None, offset=None)await client.update_schedule(request)await client.pause_schedule(schedule_id)await client.resume_schedule(schedule_id)await client.delete_schedule(schedule_id)await client.list_schedule_occurrences(schedule_id, include_terminal=True|False)await client.list_schedule_tools()await client.call_schedule_tool({"name": "...", "arguments": {...}})
WorkGraph
WorkGraph is exposed as read-only observability from the SDK. Agents mutate work through their WorkGraph tools; SDK callers inspect the current graph.
await client.get_workgraph_item(item_id, realm_id=None, namespace=None)await client.list_workgraph_items(filter=None)await client.list_ready_workgraph_items(filter=None)await client.get_workgraph_snapshot(filter=None)await client.list_workgraph_events(filter=None)await client.get_workgraph_goal_status(GoalStatusRequest(...))await client.list_workgraph_attention(AttentionListRequest(...))
Jobs, approvals, artifacts, and projected event replay
- jobs:
jobs_get/list/cancel/progress/result/artifacts/retry/health/subscribe/unsubscribe - monitors and Meta workers:
monitors_start,meta_job_* - approvals:
request_approval,list_approvals,get_approval,decide_approval - artifacts:
list_artifacts,get_artifact,download_artifact - projected event recovery:
latest_event_cursor,list_events_since,event_snapshotwhen host event projection is enabled
Approval calls maintain audit records only; they do not automatically gate, authorize, or execute an action. They persist when the RPC bundle exposes a store path and otherwise remain process-local.
Explicitly ephemeral memory realms do not expose event cursor or snapshot replay APIs.
Every public Python RPC wrapper binds its request and result transport boundary
to generated RPC-schema contracts. Generated request/result classes for the
families above currently live in meerkat.generated.types; they are not
re-exported at the package root.
Auth profiles and credentials are realm-scoped. Provisioning yields an
auth_binding for a session or mob member spec, so the spec does not carry the
provider secret. Remote hosts resolve bindings only inside their authorized
realm.
Transcript editing and reconciliation
input_state,export_session_atif- transcript revision read/list, fork-at/fork-replace, rewrite, system-prompt update, and revision restore
Mob runtime
await client.read_mob_events(mob_id, after_cursor=0, limit=100)await mob.read_events(after_cursor=0, limit=100)await mob.spawn_many(specs) -> MobSpawnManyResultawait mob.wait_for_kickoff_complete(...)- helper methods use canonical
role_name - trusted multi-host controls cover host bind/revoke, route installs, scope grants, hard cancel, member history, and remote member live channels
Multi-host mutations are trusted host APIs. They are not agent-callable, and
the agent spawn wire cannot declare Rust's one-shot resume_from_role role
migration authority.
Live WebSocket and WebRTC
LiveChannel wraps the session-bound live lifecycle. live_open returns a
discriminated websocket or webrtc bootstrap. Only the WebSocket variant has
url; WebRTC callers create an SDP offer and call
live_webrtc_answer(channel_id, token, offer_sdp).
WebRTC requires connect(live_webrtc=True) and an rkat-rpc binary compiled
with its non-default live-webrtc Cargo feature. The 0.8.24 auto-downloaded
release binary omits that feature. Build a custom binary with
./scripts/repo-cargo build -p meerkat-rpc --features live-webrtc, and add an
audio track or the meerkat.live data channel before the browser creates its
offer. Set the local description, wait for ICE gathering to complete, and send
peer.localDescription.sdp; there is no candidate-trickle RPC. Install the
returned answer_sdp as the browser peer's remote description before live
input. WebSocket uses connect(live_ws=True) and does not need that Cargo
feature.
Realm profile CRUD
await client.create_mob_profile(name, profile)await client.get_mob_profile(name)returnsStoredMobProfile | Noneawait client.list_mob_profiles()await client.update_mob_profile(name, profile, expected_revision=...)await client.delete_mob_profile(name, expected_revision=...)
Streaming
session.stream(...) and client.create_session_streaming(...) return EventStream, an async context manager yielding typed event dataclasses (TextDelta, TurnCompleted, ToolExecutionCompleted, etc.).
from meerkat import TextDelta
async with session.stream("Explain this in detail.") as events:
async for event in events:
match event:
case TextDelta(delta=chunk):
print(chunk, end="", flush=True)
result = events.result
TurnCompleted.usage is optional; absent means unmeasured, not zero.
RunStarted.input preserves the typed RunInput: content (text or blocks) or
a pending_tool_results continuation without a fabricated prompt.
RunFailed accepts the current error_report and derives its display fields
from that report.
Inventory-known events without a handwritten parser class arrive as
UnknownEvent, preserving event.type and the complete wire payload in
event.data. This includes server_tool_content, all four model_fallback_*
events, transcript_rewrite_audit_receipt_committed, boundary_append_applied,
and boundary_appends_discarded. A present type outside the generated inventory
raises MeerkatError with code UNKNOWN_EVENT_TYPE.
A missing type or malformed payload for a handwritten parser class arrives as
UnknownEvent(type="malformed_event"), with the original payload in
event.data. The Retrying and HookFailed parsers still expect legacy flat
fields; current payloads carry retry and reason, respectively, so they take
this malformed path. See the event compatibility
reference for details.
Run tests
pip install -e "sdks/python[dev]"
pytest sdks/python/tests/test_types.py -v
pytest sdks/python/tests/test_audit_parity.py -v
pytest sdks/python/tests/test_e2e.py -v
pytest sdks/python/tests/test_e2e_smoke.py -v
1 maintainer
Metadata
1 maintainer
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