TypeScript parity

Every capability the Python SDK exposes has a TypeScript counterpart, or a documented exception. This page is generated from the public surface of both SDKs by the parity test (sdks/python/tests/test_parity.py); do not edit it by hand. Regenerate it with ATTEST_UPDATE_PARITY=1 after changing either SDK’s surface.

Python names map to TypeScript names by snake_case to camelCase, plus an explicit alias table. Capabilities that decide a test outcome (simulation scenarios, personas and fault injection, the plugin runner and its discovery, init, capture, replay and world helpers, trials) are never exceptions. Commands other than init are forwarded to the engine by both SDKs, so they are identical.

Exceptions use one of three reasons: upstream_python_only (the framework has no TypeScript release), otel_capture (TypeScript users capture the framework through OpenTelemetry) or language_idiom (the TypeScript way is named in the note).

Documented exceptions

Python	Reason	TypeScript way
`CrewAIAdapter`	`upstream_python_only`	CrewAI has no TypeScript release.
`GoogleADKAdapter`	`otel_capture`	Capture Google ADK runs through its OpenTelemetry spans with `attest capture`.
`LlamaIndexInstrumentationHandler`	`otel_capture`	Capture LlamaIndex runs through its OpenTelemetry spans with `attest capture`.
`BaseProviderAdapter`	`language_idiom`	TypeScript adapters implement the `TraceAdapter` interface directly; there is no template-method base class.
`evaluate_async`	`language_idiom`	`evaluate` is already async in TypeScript.
`inspect_async`	`language_idiom`	`inspect` is already async in TypeScript.
`integration`	`language_idiom`	Vitest splits integration tests with a separate include glob or `test:integration` script.

Adapters

Python	TypeScript	Status	Note
`AnthropicAdapter`	`AnthropicAdapter`	match	-
`CrewAIAdapter`	-	exception (`upstream_python_only`)	CrewAI has no TypeScript release.
`GeminiAdapter`	`GeminiAdapter`	match	-
`GoogleADKAdapter`	-	exception (`otel_capture`)	Capture Google ADK runs through its OpenTelemetry spans with `attest capture`.
`LangChainAdapter`	`LangChainAdapter`	match	-
`LangChainCallbackHandler`	`LangChainAdapter`	alias	-
`LlamaIndexInstrumentationHandler`	-	exception (`otel_capture`)	Capture LlamaIndex runs through its OpenTelemetry spans with `attest capture`.
`ManualAdapter`	`ManualAdapter`	match	-
`OTelAdapter`	`OTelAdapter`	match	-
`OllamaAdapter`	`OllamaAdapter`	match	-
`OpenAIAdapter`	`OpenAIAdapter`	match	-

Top-level exports

Python	TypeScript	Status	Note
`Agent`	`Agent`	match	-
`AgentResult`	`AgentResult`	match	-
`AlertDispatcher`	`AlertDispatcher`	match	-
`Assertion`	`Assertion`	match	-
`AssertionResult`	`AssertionResult`	match	-
`BaseAdapter`	`TraceAdapter`	alias	-
`BaseProviderAdapter`	-	exception (`language_idiom`)	TypeScript adapters implement the `TraceAdapter` interface directly; there is no template-method base class.
`BiasProbe`	`BiasProbe`	match	-
`CaptureError`	`CaptureError`	match	-
`ContinuousEvalRunner`	`ContinuousEvalRunner`	match	-
`ConversationMessage`	`ConversationMessage`	match	-
`DriftReport`	`DriftReport`	match	-
`ENGINE_VERSION`	`ENGINE_VERSION`	match	-
`EgressBlockedError`	`EgressBlockedError`	match	-
`EngineTimeoutError`	`EngineTimeoutError`	match	-
`ExpectChain`	`ExpectChain`	match	-
`Fixture`	`Fixture`	match	-
`JudgeAgreement`	`JudgeAgreement`	match	-
`JudgeMetadata`	`JudgeMetadata`	match	-
`REASON_REPLAY_MISS`	`REASON_REPLAY_MISS`	match	-
`Related`	`Related`	match	-
`ReplayError`	`ReplayError`	match	-
`ReplayMissError`	`ReplayMissError`	match	-
`ReplayNotEvaluatedError`	`ReplayNotEvaluatedError`	match	-
`ReplaySession`	`ReplaySession`	match	-
`ReplaySummary`	`ReplaySummary`	match	-
`Sampler`	`Sampler`	match	-
`SimulateFaultConfig`	`SimulateFaultConfig`	match	-
`SimulatePersona`	`SimulatePersona`	match	-
`Step`	`Step`	match	-
`TIER_1`	`TIER_1`	match	-
`TIER_2`	`TIER_2`	match	-
`TIER_3`	`TIER_3`	match	-
`Trace`	`Trace`	match	-
`TraceBuilder`	`TraceBuilder`	match	-
`TraceMetadata`	`TraceMetadata`	match	-
`TraceTree`	`TraceTree`	match	-
`Usage`	`Usage`	match	-
`WorldError`	`WorldError`	match	-
`WorldSession`	`WorldSession`	match	-
`agent`	`agent`	match	-
`config`	`config`	match	-
`delegate`	`delegate`	match	-
`egress_block_requested`	`egressBlockRequested`	match	-
`expect`	`attestExpect`	alias	-
`first_miss`	`firstMiss`	match	-
`install_egress_guard`	`installEgressGuard`	match	-
`is_provider_host`	`isProviderHost`	match	-
`live_line`	`liveLine`	match	-
`load_fixture`	`loadFixture`	match	-
`record`	`record`	match	-
`related`	`related`	match	-
`resolve_mode`	`resolveMode`	match	-
`start_replay`	`startReplay`	match	-
`start_world`	`startWorld`	match	-
`tier`	`tier`	match	-
`uninstall_egress_guard`	`uninstallEgressGuard`	match	-

ExpectChain methods

Python	TypeScript	Status	Note
`agent_called`	`agentCalled`	match	-
`agent_ordered_before`	`agentOrderedBefore`	match	-
`agent_output_contains`	`agentOutputContains`	match	-
`agent_wall_time_under`	`agentWallTimeUnder`	match	-
`agents_overlap`	`agentsOverlap`	match	-
`aggregate_cost_under`	`aggregateCostUnder`	match	-
`aggregate_latency_under`	`aggregateLatencyUnder`	match	-
`aggregate_tokens_under`	`aggregateTokensUnder`	match	-
`all_tools_called`	`allToolsCalled`	match	-
`assertions`	`assertions`	match	-
`constraint`	`constraint`	match	-
`content_contains`	`contentContains`	match	-
`cost_under`	`costUnder`	match	-
`cross_agent_data_flow`	`crossAgentDataFlow`	match	-
`delegation_depth`	`delegationDepth`	match	-
`evaluated`	`evaluated`	match	-
`follows_transitions`	`followsTransitions`	match	-
`forbidden_tools`	`forbiddenTools`	match	-
`latency_under`	`latencyUnder`	match	-
`max_tool_failure_streak`	`maxToolFailureStreak`	match	-
`no_duplicate_tools`	`noDuplicateTools`	match	-
`no_tool_cycles`	`noToolCycles`	match	-
`no_tool_loops`	`noToolLoops`	match	-
`ordered_agents`	`orderedAgents`	match	-
`output_contains`	`outputContains`	match	-
`output_field_matches_schema`	`outputFieldMatchesSchema`	match	-
`output_forbids`	`outputForbids`	match	-
`output_has_all_keywords`	`outputHasAllKeywords`	match	-
`output_has_any_keyword`	`outputHasAnyKeyword`	match	-
`output_matches_regex`	`outputMatchesRegex`	match	-
`output_matches_schema`	`outputMatchesSchema`	match	-
`output_not_contains`	`outputNotContains`	match	-
`output_similar_to`	`outputSimilarTo`	match	-
`passes_judge`	`passesJudge`	match	-
`plugin`	`plugin`	match	-
`required_tools`	`requiredTools`	match	-
`step_count`	`stepCount`	match	-
`tokens_between`	`tokensBetween`	match	-
`tokens_under`	`tokensUnder`	match	-
`tool_arg_satisfies`	`toolArgSatisfies`	match	-
`tool_args_match_schema`	`toolArgsMatchSchema`	match	-
`tool_call_count`	`toolCallCount`	match	-
`tool_called_before`	`toolCalledBefore`	match	-
`tool_cardinality`	`toolCardinality`	match	-
`tool_result_matches_schema`	`toolResultMatchesSchema`	match	-
`tools_called_exactly`	`toolsCalledExactly`	match	-
`tools_called_in_order`	`toolsCalledInOrder`	match	-
`trace`	`trace`	match	-
`trajectory`	`trajectory`	match	-
`trajectory_partial_order`	`trajectoryPartialOrder`	match	-
`world`	`world`	match	-

Engine fixture methods

Python	TypeScript	Status	Note
`client`	`client`	match	-
`enforce`	`enforce`	match	-
`evaluate`	`evaluate`	match	-
`evaluate_async`	-	exception (`language_idiom`)	`evaluate` is already async in TypeScript.
`inspect`	`inspect`	match	-
`inspect_async`	-	exception (`language_idiom`)	`inspect` is already async in TypeScript.
`start`	`start`	match	-
`stop`	`stop`	match	-

`init` flags

Python	TypeScript	Status	Note
`--ci`	`--ci`	match	-
`--json`	`--json`	match	-
`--mcp`	`--mcp`	match	-
`--skills`	`--skills`	match	-

Plugin runner

Python	TypeScript	Status	Note
`AttestPlugin`	`AttestPlugin`	match	-
`PluginRegistry`	`PluginRegistry`	match	-
`PluginResult`	`PluginResult`	match	-
`execute_plugin_assertion`	`executePluginAssertion`	match	-
`load_entrypoint_plugins`	`loadPackagePlugins`	alias	-
`register_plugin`	`registerPlugin`	match	-

Simulation

Python	TypeScript	Status	Note
`ADVERSARIAL_USER`	`ADVERSARIAL_USER`	match	-
`CONFUSED_USER`	`CONFUSED_USER`	match	-
`COOPERATIVE_USER`	`COOPERATIVE_USER`	match	-
`FRIENDLY_USER`	`FRIENDLY_USER`	match	-
`MockToolRegistry`	`MockToolRegistry`	match	-
`Persona`	`SimulatePersona`	alias	-
`RepeatResult`	`RepeatResult`	match	-
`ScenarioConfig`	`ScenarioConfig`	match	-
`ScenarioResult`	`ScenarioResult`	match	-
`configure`	`config`	alias	`config` configures simulation mode in TypeScript.
`fault_inject`	`faultInject`	match	-
`is_simulation_mode`	`isSimulationMode`	match	-
`mock_tool`	`mockTool`	match	-
`repeat`	`repeat`	match	-
`scenario`	`scenario`	match	-

Test-runner helpers

Python	TypeScript	Status	Note
`attest`	`useAttest`	alias	The pytest `attest` marker and fixture map to `useAttest()`; Vitest selects tests by file glob.
`attest_budget`	`evaluate`	alias	Pass the `testBudget` option to `evaluate`/`inspect`.
`attest_engine`	`useAttest`	alias	-
`attest_min_pass_rate`	`trials`	alias	Pass the `minPassRate` option to `trials`.
`attest_replay`	`useReplay`	alias	-
`attest_tier`	`filterByTier`	alias	Filter with `filterByTier`; tag tests with `tier`.
`attest_world`	`useWorld`	alias	-
`integration`	-	exception (`language_idiom`)	Vitest splits integration tests with a separate include glob or `test:integration` script.