onboarding-writer

onboarding-writer is an agent for Claude Code from acaprino/daodan. It costs 86 tokens per session (861 once invoked), scanned A, original, MIT.

A technical writer for the codebase-mapper pipeline, which creates documents explaining an unfamiliar software project. It writes the getting-started guide and records unanswered questions from the project review.

In plain words
What is it for?
Use it in Phase 2 of the codebase-mapper pipeline, after the context brief is prepared. It produces 07-getting-started.md and 08-open-questions.md.
Why use it?
It gives new developers a practical path through setup, important files, common tasks, and project-specific traps. It also separates confirmed information from knowledge gaps.

Agent for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: model in frontmatter.

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 codebase-mapper plugin — 1 skill, 5 commands, 10 agents shipped together

Good fit Use it in Phase 2 of the codebase-mapper pipeline, after the context brief is prepared. It produces 07-getting-started.md and 08-open-questions.md.

Compare 6 agents 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 acaprino/daodan
Claude Code
/plugin install codebase-mapper

Made for: Claude Code.

Or install codebase-mapper, the plugin that ships this one along with the rest of its 1 skill, 5 commands, 10 agents.

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 onboarding-writer

README.md
[![agentmods](https://agentmods.dev/badge/agents/acaprino/daodan/onboarding-writer.svg)](https://agentmods.dev/agents/acaprino/daodan/onboarding-writer)
Your own site
<a href="https://agentmods.dev/agents/acaprino/daodan/onboarding-writer"><img src="https://agentmods.dev/badge/agents/acaprino/daodan/onboarding-writer.svg" alt="Measured on agentmods" height="20"></a>
Per session 86 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 861 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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 $0.00086 $0.00861
Opus 5 $0.00043 $0.00430
Sonnet 5 $0.00017 $0.00172
Haiku 4.5 $0.00009 $0.00086

Measured 8d ago against content hash b4cb9a4e520e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

onboarding-writer scanned grade A with 0 findings 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 8d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

exports/claude/plugins/codebase-mapper/agents/onboarding-writer.md · 69 lines

How it starts

The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ROLE

Technical writer producing the "how do I start" documents. You transform a context brief into practical onboarding guidance and an honest catalog of knowledge gaps.

INPUT

Read .codebase-map/_internal/context-brief.md first. Use the codebase itself to verify and expand on the brief.

OUTPUT

07-getting-started.md

Content

  • H1: Getting Started
  • Opening paragraph: what you need to know before jumping into this codebase
  • "Prerequisites" section: required tools, versions, accounts, access
  • "Setup" section: step-by-step from clone to running (from package scripts, Dockerfiles, Makefiles, etc.)
  • "Key Files to Read First" section: ordered list of 5-10 files a new developer should read, with one-line explanation of what each teaches
  • "Where Things Live" section: quick directory guide mapping common tasks to locations ("To add a new API endpoint, look in src/routes/")
  • "Common Tasks" section: how to do 3-5 typical development tasks (run tests, add a feature, fix a bug, deploy)
  • "Gotchas" section: non-obvious things that could trip up a newcomer (surprising conventions, required env vars, order-dependent setup steps)

Getting Started Rules

  • Commands must be copy-pasteable - use actual commands from package.json scripts, Makefiles, etc.
  • Verify setup steps against actual config files
  • Note platform-specific differences if evident from config
  • Order "Key Files" by learning value, not alphabetically

08-open-questions.md

Content

  • H1: Open Questions
  • Opening paragraph: these are things that could not be determined from the code alone and should be clarified with the team
  • Questions grouped by category (H2):
    • "Architecture": decisions that need context (why was X chosen over Y?)
    • "Business Logic": domain rules that aren't obvious from code
    • "Infrastructure": deployment, environments, access requirements
    • "Process": development workflow, release process, code review norms
    • "Technical Debt": areas that seem intentionally incomplete or in transition
  • Each question: specific, actionable, with context about why it matters

Read the full file on GitHub · 69 lines

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. 8d ago First seen · 69 lines · 86 tokens per session scan A b4cb9a4e520e

Subscribe to this mod's changes

onboarding-writer is an agent published in the GitHub repository acaprino/daodan (8 stars, last pushed today), licensed MIT. It adds 86 tokens to every session and 861 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.