Langfuse Skills

Use when editing worker/src/constants/default-model-prices.json, packages/shared/src/server/llm/types.ts, pricing tiers, tokenizer IDs, or matchPattern regexes…

Use when editing worker/src/constants/default-model-prices.json, packages/shared/src/server/llm/types.ts, pricing tiers, tokenizer IDs, or matchPattern regexes…

Use this skill when changing the shared agent setup for the repository.

Analyze Langfuse Cloud infrastructure cost structure using Metabase cost marts. Use when asked about cloud spend, AWS versus ClickHouse cost splits, cost…

Analyze Langfuse Cloud infrastructure cost structure using Metabase cost marts. Use when asked about cloud spend, AWS versus ClickHouse cost splits, cost…

Build or review Langfuse backend code. Use for tRPC routers, public REST APIs, BullMQ processors, services, middleware, Prisma or ClickHouse access,…

Shared backend guide for Langfuse's Next.js, tRPC, BullMQ, and TypeScript monorepo. Use when creating or reviewing tRPC routers, public REST endpoints, BullMQ…

Shared workflow for writing Langfuse changelog entries after a feature is complete. Use when a branch is ready for merge and a changelog entry or changelog…

Use this skill when a completed feature branch needs a changelog entry.

MUST USE when reviewing ClickHouse schemas, queries, or configurations. Contains 28 rules that MUST be checked before providing recommendations. Always read…

MUST USE when reviewing ClickHouse schemas, queries, or configurations. Contains 28 rules that MUST be checked before providing recommendations. Always read…

Review Langfuse code changes for correctness, regressions, and best practices.

Use this skill when the task is to review code changes rather than implement a feature.

Design, implement, review, or harden Langfuse repo-owned autonomous agents. Use for LLM-powered GitHub Actions, scheduled or dispatched agents, agent-created…

Use when designing, implementing, reviewing, or hardening Langfuse repo-owned autonomous agents, especially GitHub Actions that invoke Claude, Codex, or…

Research Langfuse production telemetry with reusable Datadog queries. Use for tenant or project activity, API usage, queue behavior, spans, logs, metrics, or…

Langfuse-specific Datadog query recipes for production telemetry research. Use when asked to investigate tenant or project activity, public API endpoint usage,…

Establish root cause by combining Datadog telemetry with the Langfuse repo. Use when investigating or triaging a user report, Linear or GitHub issue, incident,…

Debug a user-reported issue, Linear ticket, or incident report by combining Datadog (APM, logs, metrics) with the Langfuse repo to establish a root cause. Use…

Proactively detect production regressions in Langfuse by comparing recent Datadog errors, error logs, error spans, and API route latency signals…

Use this skill when a change affects what users see or do in the browser.

Use when building, changing, or refactoring large Langfuse frontend features, virtualized lists, large tables, controller components, local feature…

Langfuse repo Git, GitHub, commit, branch, pull request, issue search, release, and production-promotion workflow. Use when staging, committing, pushing,…

Langfuse repo Git, GitHub, commit, branch, pull request, issue search, release, and production-promotion workflow. Use when staging, committing, pushing,…

Triage an engineer's work queue across Linear, Pylon, and GitHub. Use for assigned, urgent, waiting, or stale issues, support follow-ups, and PR reviews.

Review an engineer's recurring work queue across Linear, Pylon, and GitHub. Use when asked to triage assigned issues, waiting or urgent work, customer-support…

Read and, after human approval, update the Linear `incident-alert` knowledge base. Use before and after investigating a named Datadog monitor,…

Tune and review Langfuse autoscaling for web, web-iso, and web-ingestion. Use for Terraform scale settings, RPM targets, scaling bounds, task counts,…

Tune Langfuse infrastructure autoscaling safely across web, web-iso, and web-ingestion. Use when Codex needs to review or change Terraform scale settings, RPM…

Programmatic Langfuse data access and documentation lookup via CLI and web resources. Query and modify Langfuse data (traces, prompts, datasets, scores, sessions) using the langfuse-cli via npx with full REST API schema discovery Access current Langfuse documentation through three methods: structured index (llms.txt), individual markdown pages, and cross-doc search API Includes use-case-specific reference guides for instrumentation, prompt migration, user feedback capture, SDK upgrades, and...

Interact with the Langfuse API. Use when user wants to query traces, fetch prompts, create datasets, manage scores, or do anything else via the Langfuse REST…

Interact with Langfuse and access its documentation. Use when needing to (1) query or modify Langfuse data programmatically via the CLI — traces, prompts,…

Navigate Langfuse repositories, code areas, and agent skills. Use when a user or agent asks where Langfuse code lives, which Langfuse repo to inspect, which…

Instrument LLM applications with Langfuse tracing. Use when setting up Langfuse, adding observability to LLM calls, or auditing existing instrumentation.

Use Langfuse's disposable per-PR previews at pr-N.preview.langfuse.com (synthetic data only). Use for preview access, failed deployments, test-data seeding,…

Migrate hardcoded prompts to Langfuse for version control and deployment-free iteration. Use when user wants to externalize prompts, move prompts to Langfuse,…

Use this skill after a bug or regression candidate has measured evidence to document them within linear.

Deduplicate measured bug or regression evidence against Linear, then either add evidence comments to related existing issues or create concise Linear…

Upgrade pnpm workspace dependencies to target/latest versions: direct/transitive bumps, release-age checks, temporary overrides, minimumReleaseAgeExclude,…

Upgrade pnpm workspace dependencies to target/latest versions: direct/transitive bumps, release-age checks, temporary overrides, minimumReleaseAgeExclude,…

Product analytics with posthog. Use when adding a meaningful user action or feature in `web/**`, touching PostHog capture code, or answering product-usage…

Use this skill to clean up a React component. Only use this skill when instructed to do so by the user.

Guidelines for writing React components. Use this when creating a new react component.

Refactor avoidable React useEffect usage in Langfuse frontend code. Use when adding, reviewing, or removing effects; initializing forms or local UI state from…

Review Langfuse changes for SSRF, tenant isolation, secret handling, unsafe redirects or uploads, and RBAC drift. Use when a design or change accepts URLs or…

Security review patterns for Langfuse. Use during code review, design, or planning whenever a change accepts user-supplied URLs, host/endpoint/baseURL fields,…

Seed reproducible local Langfuse data in ClickHouse and Postgres. Use for complex traces, long sessions, v3/v4 events, bulk list data, or frontend rendering…

Seed local Langfuse test data with one command: large/branching observation trees (v3 and v4 events), long sessions, bulk traces for list performance. Use…

Decide whether and how errors report to Sentry. Use when touching capture or error-handling paths in `web/**`, triaging Sentry noise, or changing Sentry…

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's…

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's…

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Codex's…

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Codex's…

Create and manage Claude Code skills following Anthropic best practices. Use when creating new skills, modifying skill-rules.json, understanding trigger…

Create and manage Claude Code skills following Anthropic best practices. Use when creating new skills, modifying skill-rules.json, understanding trigger…

Use when writing or reviewing Storybook stories (`.stories.tsx`) for React components.

Configure and troubleshoot Turborepo monorepos. Use for turbo.json, task pipelines, dependsOn, caching, filters, affected packages, CI…

Build system for JavaScript/TypeScript monorepos. Turborepo caches task outputs and runs tasks in parallel based on dependency graph.

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js…

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js…

Prepare Langfuse weekly production reviews covering failures, fixes, open issues, and tracking gaps. Use for "what broke last week," production bugs, Datadog…

Prepare Langfuse weekly production reviews that audit what broke, what was fixed, what remains open, and where Datadog, incident.io, or Linear tracking needs…