Arnesto — the agent harness that got out of hand
This repository also configures its own agents. See what arnesto tells them →
Skill Claude CodeCodex
Expertise in generating clean, correct, and efficient Dataform pipeline code for BigQuery ELT. Use this when creating or modifying Dataform pipelines, actions, or source declarations, when Dataform, SQLX, or BigQuery are mentioned in a transformation, when data needs to be ingested from GCS into BigQuery via Dataform…
Skill Claude CodeCodex
Expert guidance for creating, modifying, and optimizing dbt pipelines for BigQuery. Use this skill whenever user asks for generating or modifying a dbt model or project. Activate this skill when the user - Creates, modifies, or troubleshoots dbt models or pipelines - Needs to optimize SQL within a dbt project - Is…
Skill Claude CodeCodex
Use when asked to "run a design sprint", "5-day sprint", "prototype in a week", "test ideas before building", or "Jake Knapp sprint". Helps teams go from problem to tested prototype in five days. The Design Sprint framework (created by Jake Knapp at Google Ventures) compresses months of work into one focused week.
Skill Claude CodeCodex
A repository of BigQuery-specific logic, knowledge, and specialized standards. Use this skill whenever you are doing anything with BigQuery, including: 1. BigQuery query optimization 2. BigFrames Python code 3. BigQuery ML/AI functions.
Skill Claude CodeCodex
Disciplined diagnosis loop for hard bugs and performance regressions. Reproduce → minimise → hypothesise → instrument → fix → regression-test. Use when user says "diagnose this" / "debug this", reports a bug, says something is broken/throwing/failing, or describes a performance regression.
Skill Claude CodeCodex
Finds and inspects data assets within Google Cloud. Relevant when any of the following conditions are true: 1. The user request involves finding, exploring, or inspecting data assets in Google Cloud, such as: BigQuery datasets, tables, or views BigLake catalog or tables Spanner instances, databases or tables etc. 2.…
Skill Claude CodeCodex
Reviews Dockerfiles for build performance, image size, and security issues. Use when optimizing, validating, or improving Dockerfiles.
Skill Codex
Use current library and framework docs through Context7, preferring MCP tools with the CLI as a fallback. Activates for setup questions, API references, code examples, or named frameworks such as React, Next.js, or Prisma.
Skill Claude CodeCodex
Designs systems using Event Modeling.
Skill Claude Code
Calculate RICE scores and prioritize features systematically. Use when building your product roadmap and need to make data-driven prioritization decisions.
Skill Claude CodeCodex
Build a detailed, phase-based implementation plan from research or a task description. Use when the user asks for implementation planning, phased rollout, or a concrete execution plan.
Skill Claude CodeCodex
Execute an approved implementation plan phase by phase with verification. Use when the user asks to implement a plan file from thoughts/shared/plans.
Skill Claude CodeCodex
Research and document the current codebase state without proposing changes. Use when the user asks to investigate existing behavior, architecture, or implementation details and capture findings.
Skill Claude CodeCodex
Validate that an implementation plan was executed correctly. Use when the user asks to verify completion, compare code changes to a plan, or produce a validation report.
Skill Claude CodeCodex
Retrieves up-to-date documentation, API references, and code examples for any developer technology. Use this skill whenever the user asks about a specific library, framework, SDK, CLI tool, or cloud service -- even for well-known ones like React, Next.js, Prisma, Express, Tailwind, Django, or Spring Boot. Your…
Skill Claude CodeCodex
Helps users discover and install agent skills when they ask questions like "how do I do X", "find a skill for X", "is there a skill that can...", or express interest in extending capabilities. This skill should be used when the user is looking for functionality that might exist as an installable skill.
Skill Claude CodeCodex
Run an explicitly requested, bounded, non-sensitive coding task through the local free-worker adapter using a verified free OpenCode model. Use only when the user asks to execute a free worker or free agent and accepts the external-model safety boundary.
Skill Claude CodeCodex
Guidelines for identifying and resolving missing Google Cloud authentication and Application Default Credentials (ADC). Use this skill if gcloud, bq, dataform, or Python libraries return authentication errors.
Skill Claude CodeCodex
Provides expert guidance for troubleshooting Cloud Composer (Apache Airflow) and Orchestration pipelines. Use this skill when the user asks to generate Root Cause Analysis (RCA), troubleshoot or fix a failed pipeline, DAG in Composer environment and generate RCA report.
Skill Claude CodeCodex
Primary entry point for building, managing, and orchestrating data pipelines on Google Cloud. Guides users to the appropriate skill for dbt, Dataflow (Apache Beam), Dataform, Spark (Dataproc Serverless), BigQuery Data Transfer Service (DTS) or orchestration pipeline using Cloud Composer. Clarify requirements and…
Skill Claude CodeCodex
Provides guidance for writing, packaging and executing Apache Beam pipelines on GCP using Cloud Dataflow. Use when: - Creating an Apache Beam Dataflow pipeline. - Creating a Google Flex Template.
Skill Claude CodeCodex
This skill helps the agent generate or update orchestration pipeline definitions for Google Cloud Composer to initialize orchestration pipeline or update the orchestration definition for orchestration of various data pipelines, like dbt pipelines, notebooks, Spark jobs, Dataform, Python scripts or inline BigQuery SQL…
Skill Claude CodeCodex
Automates declarative resource creation and provisioning for data pipelines, supporting BigQuery, Dataform, Dataproc, BigQuery Data Transfer Service (DTS), and other resources. It manages environment-specific configurations (dev, staging, prod) through a deployment.yaml file. Use when: Modifying or creating…
Skill Claude CodeCodex
Develops and executes Spark code on Dataproc Clusters and Serverless. Reads and writes data using BigLake Iceberg catalogs, BigQuery and Spanner. Debugs execution failures. Use when: Writing Spark ETL pipelines on GCP. Training or running inference with ML models with spark on GCP. Managing Spark clusters, jobs…
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: