onboard

onboard is a skill for Claude Code from geniro-io/geniro-claude-harness. It costs 62 tokens per session (5,619 once invoked), scanned C, a copy of geniro-onboard, Apache-2.0.

A guided onboarding process for an unfamiliar codebase that scans its structure and conventions, then creates a CODEBASE_MAP.md reference document.

In plain words
What is it for?
Use it when starting work in a new repository and needing a broad orientation rather than investigating one specific bug or question.
Why use it?
It reduces the time spent figuring out where the main entry points, modules, architecture, and critical paths are before making changes.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter; mentions subagents; names the AskUserQuestion tool.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the geniro plugin — 37 skills, 8 agents, 1 hook shipped together

Good fit Use it when starting work in a new repository and needing a broad orientation rather than investigating one specific bug or question.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add geniro-io/geniro-claude-harness
Claude Code
/plugin install geniro

Made for: Claude Code.

Or install geniro, the plugin that ships this one along with the rest of its 37 skills, 8 agents, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for onboard

README.md
[![agentmods](https://agentmods.dev/badge/skills/geniro-io/geniro-claude-harness/onboard/github.svg)](https://agentmods.dev/skills/geniro-io/geniro-claude-harness/onboard)
Your own site
<a href="https://agentmods.dev/skills/geniro-io/geniro-claude-harness/onboard"><img src="https://agentmods.dev/badge/skills/geniro-io/geniro-claude-harness/onboard/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for onboard

Your own site · 80×15
<a href="https://agentmods.dev/skills/geniro-io/geniro-claude-harness/onboard"><img src="https://agentmods.dev/badge/skills/geniro-io/geniro-claude-harness/onboard.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,619 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 94% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00062 $0.05619
Opus 5 $0.00031 $0.02809
Sonnet 5 $0.00012 $0.01124
Haiku 4.5 $0.00006 $0.00562

Measured 12d ago against content hash 4bdb6963fd0d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade C, and why

onboard scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf .geniro/state/onboard/<slug>/ 2>/dev/null || true
Origin

This is a copy

94% identical to geniro-onboard — 14 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/onboard/SKILL.md · 300 lines

How it starts

The opening of the file, as written. The whole thing — 300 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Onboard: rapid codebase orientation

Contents

  • Arguments
  • Outputs — the 8-section _CODEBASE_MAP.md template
  • State machine
  • Loop invariants
  • Anti-rationalization
  • Quality-first budgets
  • ACI per-phase tool surface
  • Definition of done
  • Phase 1 — Discover
  • Phase 2 — Map
  • State file schema

2-phase loop (Discover → Map). Generates a structured map that serves as a reference for the session.

Runtime portability. ${CLAUDE_PLUGIN_ROOT} is a path placeholder Claude Code substitutes into file references, never a shell export — it reads empty in a Bash call under every host, Claude Code included, so an empty probe is no evidence of another runtime (CLAUDECODE in the environment marks Claude Code). Resolve the root by working these in order: the ancestor directory of this file containing .claude-plugin/plugin.json; a copy of the referenced file sitting beside this one (the Cursor build ships each skill's own phase and reference files there); a plugin checkout inside the workspace. Substitute the resolved root for every ${CLAUDE_PLUGIN_ROOT} occurrence and export it as CLAUDE_PLUGIN_ROOT in every Bash call. Work the rungs with a command, not a judgment: the run's first Bash call lists the directory this file was read from and each candidate root, and its output is echoed verbatim before anything else. Read the rungs against that output — a path it does not show did not resolve, and a file it does not show cannot be read, however confidently a later step would report otherwise. A ladder that resolves is bookkeeping, not a finding: keep the echo to the probe output and the resolved root, and reserve a degraded-run notice for a rung that actually failed. Read ${CLAUDE_PLUGIN_ROOT}/skills/_shared/runtime-portability.md before deciding a step cannot run here: it substitutes mechanisms, not steps, and routes a host with no one to ask to ${CLAUDE_PLUGIN_ROOT}/skills/_shared/non-interactive-host.md. When no rung resolves, the files are missing but the contract is not — open your first message by naming what is unavailable, run every phase and gate this skill declares, never let the project's own rules stand in for its decision gates, and take no outward-facing action (ready-for-review PR, merge, force-push, protected-branch push, posted comment, tracker transition) without an explicit answer.

Read the full file on GitHub · 300 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 300 lines · 62 tokens per session scan C 4bdb6963fd0d

Subscribe to this mod's changes

onboard is a skill published in the GitHub repository geniro-io/geniro-claude-harness (8 stars, last pushed today), licensed Apache-2.0. It adds 62 tokens to every session and 5,619 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). It is 94% identical to geniro-onboard, differing in 14 lines, and is treated as a copy.

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