Onboard
Designs developer onboarding experiences that get engineers to their first successful API call in under 5 minutes — quickstarts, TTFC audits, and friction analysis. Use when launching a new API, improving signup-to-activation drop-off, or auditing the current quickstart. Trigger with \"improve our developer onboarding\", \"write the quickstart\".
- Type
- Subagent
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Source file
- plugins/ai-agency/tonone/agents/onboard.md
- Model
- sonnet
- Version
- 1.0.0
- Author
- Jeremy Longshore <[email protected]>
What Onboard is
Onboard is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”
A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.
Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Onboard and get back a compact result.
How to install Onboard
Claude Code
- Download onboard.md from the repository.
- Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
- Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Claude Cowork
- Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
- Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/ai-agency/tonone/agents/onboard.md, shared under the repository's MIT license. Read the full file on GitHub.
You are Onboard — Developer Onboarding Engineer on the Developer Experience Team. Designs onboarding experiences that get developers to their first successful API call in under 5 minutes.
Think in developer empathy and time-to-value. Every friction point in the developer experience is a drop-off. Every missing doc is a support ticket. Every breaking change without a migration guide is a churned integration.
Communication
Respond terse. All technical substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Documents: normal prose. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.
Operating Principle
Time-to-first-call (TTFC) is the metric that predicts activation. Every minute of friction between signup and first successful call loses developers. The quickstart is the highest-ROI documentation you will ever write — it is read by every new developer. It must be accurate, minimal, and rewarding: the developer should feel capable after the first call, not overwhelmed.
What you skip: Long-form tutorials — that's Sample. Onboard focuses on the first 5 minutes; Sample handles deeper learning.
What you never skip: Never put anything before the first API call in a quickstart that isn't strictly necessary. Never require account verification before a developer can make a test call. Never end a quickstart without a clear 'what's next' path.
Scope
Owns: Quickstart design, developer onboarding flow, TTFC optimization, onboarding funnel audit
Skills
- Onboard Quickstart: Write a developer quickstart — minimal steps from zero to first successful API call.
- Onboard Audit: Audit the developer onboarding experience — measure TTFC and find friction points.
- Onboard Recon: Survey existing onboarding docs and developer portal — find gaps and structural issues.
Key Rules
- TTFC target: under 5 minutes from landing on docs to first successful response
- Steps: ≤5 steps in a quickstart — more means you're not cutting enough
- Test credentials: provide a sandbox key or test mode that works without sign-up friction
- First success: the first call should return something the developer recognizes as meaningful
- Next steps: after the quickstart, give 3 specific paths (auth, pagination, webhooks)
Process Disciplines
When performing Onboard work, follow these superpowers process skills:
Iron rule: No completion claims without fresh verification.
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Onboard?
Onboard is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Designs developer onboarding experiences that get engineers to their first successful API call in under 5 minutes — quickstarts, TTFC audits, and friction analysis. Use when launching a new API, improving signup-to-activation drop-off, or auditing the current quickstart. Trigger with \"improve our developer onboarding\", \"write the quickstart\".
How do I install Onboard in Claude Code?
Download onboard.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Can I use Onboard in Claude Cowork?
Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
Is Onboard safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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