feat(api): update API spec from langfuse/langfuse 89956fd

[langfuse-bot]

Greptile Summary

This generated API-spec update exposes session-ID filtering for observation listing and documents new semantic-root filtering capabilities.

• Adds session_id to synchronous and asynchronous observation clients and serializes it as the sessionId query parameter.
• Documents isRootObservation for metrics and evaluation-rule filters.
• Clarifies the organization-membership requirement for comment authors.

Confidence Score: 5/5

The PR appears safe to merge, with the new observation filter correctly propagated and the documentation consistent with the generated type contracts.

The session filter remains keyword-only and is serialized under the expected query key, while the documented boolean evaluation filter matches the existing discriminated model and wire representation.

_{Reviews (1): Last reviewed commit: "feat(api): update API spec from langfuse..." | Re-trigger Greptile}

Context used:

• Knowledge Base — API Client (langfuse/api/)

[github-actions]

@claude review

[claude]

LGTM — auto-generated API client update, no bugs found.

What was reviewed: the new session_id parameter in observations get_many (client, raw_client, both sync/async) is correctly threaded through to the sessionId query param; the new isRootObservation boolean filter type addition to evaluation_rule_filter.py follows the existing discriminated-union pattern used by other filter types; docstring-only changes for metrics and comments have no behavioral effect.

Extended reasoning...

Overview

This PR is an auto-generated update of the Langfuse API client (Fern codegen) based on a spec change in the langfuse/langfuse backend repo. Changes span: docstring clarifications in comments, new documentation and examples for an isRootObservation dimension in metrics, a new optional session_id parameter added to observations.get_many (threaded through to both raw and high-level, sync and async clients), and a new boolean filter type option documented across the evaluation_rule_filter.py union types (already implemented in code via EvaluationRuleFilter_Boolean, just newly referenced in other filter classes' docstrings).

Security risks

None. This is generated client code for making authenticated HTTP requests to the Langfuse API; no new auth, crypto, or permission logic is introduced. The new session_id parameter is passed straight through to a query string param, consistent with all other existing filter parameters (e.g. user_id, trace_id).

Level of scrutiny

Low. This is boilerplate, auto-generated SDK code mirroring an upstream OpenAPI/Fern spec change. The diff is purely additive (new optional param, new docstring text, new enum-like filter type) with no control-flow changes, no removed functionality, and no edits to core request/response handling logic. This class of PR is mechanical and low-risk by nature.

Other factors

All new parameters default to None/OMIT and are backward compatible. The EvaluationRuleFilter_Boolean class already existed prior to this PR (per the diff, it wasn't newly added) — this change only adds cross-referencing documentation in sibling filter class docstrings, which is inert. No tests were affected since this is generated code with no accompanying logic changes to review against test coverage.