How do I install the Langfuse skill?

Run npx skillmds@latest add joelhooks-joelclaw/langfuse in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Langfuse safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: reads secrets. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Langfuse?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Langfuse free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Langfuse?

joelhooks (@joelhooks-joelclaw) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Langfuse by joelhooks-joelclaw — Agent Skill

Name: Langfuse
Rating: 4.2 (5 reviews)
Author: joelhooks

Langfuse

Langfuse was decommissioned on 2026-07-09 — do not add Langfuse tracing or query Langfuse for usage/cost. Use this skill only to learn where usage observability lives now. Token usage and cost questions route to `joelclaw usage` and ClickHouse otel_events.

joelhooks Updated Sep 9, 2026

File contents

Langfuse — decommissioned 2026-07-09

Langfuse is gone. It was never migrated to Flagg, its traces API 429'd/422'd under real query load (2026-07 backup/self-healing token-drain post-mortem), and every code path was removed from this repo (grep -ri langfuse packages/ apps/ returns zero).

Where usage observability lives now

CLI: joelclaw usage --hours 24 [--source router|agents|all] [--model X] [--machine Y] [--json]
Query layer: packages/system-bus/src/lib/clickhouse-usage-query.ts over ClickHouse joelclaw.otel_events
Router usage: model_router.result events carry a full usage object in metadata_json (fixed by passing --mode json to pi in inference.ts)
Agent sessions: passive tailers (packages/system-bus/src/lib/agent-usage/) parse Pi/Claude Code/Codex transcripts into agent_usage.turn events every 15 min (system/agent-usage.scan)
Pricing: packages/system-bus/src/lib/model-pricing.ts — provider-reported cost wins; OpenRouter public pricing is the benchmark fallback (pricing data only, never an inference path)
Daily report: daily-token-usage-report.ts reads ClickHouse directly

Residue

pi/extensions/langfuse-cost still exists but degrades to disabled telemetry (fails soft, by design). Superseded by the agent-usage tailers; removal is a pending follow-up.
LANGFUSE_* secrets in the secrets store are unused and can be revoked.

Project receipts: .brain/projects/agent-usage-observability-2026-07-09.svx.

Frequently asked questions