Environment Variables - Kindred

Set these in the agent you are connecting to Kindred.

Langfuse tracing

Use these when your agent is instrumented with the Langfuse SDK and registered with --trace-source langfuse.

Variable	Required	Description
`LANGFUSE_PUBLIC_KEY`	Yes	Langfuse project public key.
`LANGFUSE_SECRET_KEY`	Yes	Langfuse project secret key.
`LANGFUSE_HOST`	Yes	Langfuse host, for example `https://us.cloud.langfuse.com`.
`KINDRED_AGENT_ID`	Yes	Kindred agent id copied from the agent registration page.

LANGFUSE_PUBLIC_KEY=pk-lf-...
LANGFUSE_SECRET_KEY=sk-lf-...
LANGFUSE_HOST=https://us.cloud.langfuse.com
KINDRED_AGENT_ID=agt_...

Replay fields

You usually do not set replay fields manually. Kindred sends them to your replay endpoint when you click Run. Your replay endpoint should preserve these fields in Langfuse metadata if they appear in the request:

kindred_replay_run_id
kindred_original_session_id
kindred_include_prior_context
kindred_turn_trace_id
is_replay

Also accept these headers and map them into the same metadata:

X-Kindred-Replay
X-Kindred-Replay-Run-Id
X-Kindred-Original-Session-Id
X-Kindred-Turn-Trace-Id
X-Kindred-Include-Prior-Context