duck-orient

duck-orient is a skill for Claude Code, Codex from LeeJuOh/claude-code-zero. It costs 53 tokens per session (969 once invoked), scanned A, original, MIT.

A guided session for learning how an unfamiliar codebase is organised. It creates or refreshes an orientation document and uses exercises to help you understand the repository.

In plain words
What is it for?
Use it to explore a repository, create or update `.claude/orientation.md`, and work through interactive codebase-orientation exercises.
Why use it?
It gives you a shared written starting point when joining a project or returning after a long break.

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the rubber-duck-tutor plugin — 6 skills shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/leejuoh/claude-code-zero/duck-orient
Any agent
npx skills add LeeJuOh/claude-code-zero --skill duck-orient
Clone the repo
git clone --depth 1 https://github.com/LeeJuOh/claude-code-zero

Made for: Claude Code, Codex.

Or install rubber-duck-tutor, the plugin that ships this one along with the rest of its 6 skills.

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 duck-orient

README.md
[![agentmods](https://agentmods.dev/badge/skills/leejuoh/claude-code-zero/duck-orient.svg)](https://agentmods.dev/skills/leejuoh/claude-code-zero/duck-orient)
Your own site
<a href="https://agentmods.dev/skills/leejuoh/claude-code-zero/duck-orient"><img src="https://agentmods.dev/badge/skills/leejuoh/claude-code-zero/duck-orient.svg" alt="Measured on agentmods" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 969 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00053 $0.00969
Opus 5 $0.00026 $0.00485
Sonnet 5 $0.00011 $0.00194
Haiku 4.5 $0.00005 $0.00097

Measured 4d ago against content hash 8ff0be5fd401, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

duck-orient 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 4d 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.

plugins/rubber-duck-tutor/skills/duck-orient/SKILL.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Duck — Orientation Mode

Read first: ../ducking/engine.md — persona, "Wait for their answer", Branch-first workflow, Intensity Scaling, Uncertainty Check, Session Wrap-up + gap persistence, Facilitation, Hint Ladder, Gotchas. They apply here.

Purpose: Generate a repo orientation document, then run interactive exercises from it. For developers new to a codebase or returning after a long break.

Storage: .claude/orientation.md in the project root. Can be committed and shared with teammates.

Flow

  1. Surface confrontation telemetry: run bash ${CLAUDE_PLUGIN_ROOT}/skills/ducking/scripts/telemetry-summary.sh 30 and share the one-line result with the user before anything else (e.g., "By the way — Last 30 days: 5 fired, 3 answered, 1 ignored."). This is the answer to "is duck actually doing anything?" (S10) — one line, no elaboration, then move on to orientation.

  2. Check for .claude/orientation.md

  3. If not found (or argument is refresh):

    • Explore the repo following the methodology in ../ducking/references/orientation-guide.md
    • Generate .claude/orientation.md using the template in that guide
    • Tell the user: where it was written, how many key files and concepts were identified
    • Ask: "Want to run through the orientation exercises now?"
    • If they decline, stop. If they accept, continue to step 4.
  4. If found (and not refreshing):

    • Read .claude/orientation.md
    • Run bash ${CLAUDE_PLUGIN_ROOT}/skills/ducking/scripts/recent-gaps.sh 3 — surfaces gaps logged in past sessions for this repo
    • If output is non-empty: pick the most recent gap and open with a retrieval check-in instead of the standard summary: "🦆 Quack — last time your understanding of [gap] was shaky. Can you explain that part now?" Wait for their answer. If they can now genuinely explain it (a live judgment, same bar as any confrontation — following along or "I get it" doesn't count), call bash ${CLAUDE_PLUGIN_ROOT}/skills/ducking/scripts/resolve-gap.sh "<gap text>" so it stops resurfacing here and at ship-point — pass the gap text verbatim minus the leading date<TAB> prefix, since resolve-gap matches on an exact string. If they still can't, leave it unresolved and don't call the script. Then proceed to the exercise sequence.
    • If output is empty: summarize the orientation doc in one sentence, ask if they want to proceed.
    • Run through the Suggested exercise sequence section
    • Apply all standard duck techniques: one question at a time, wait for answer, fading scaffolding
    • After exercises: "What's one thing about this codebase that surprised you or that you want to dig into further?"
    • Use their answer to offer a relevant follow-up exercise or file to explore

Read the full file on GitHub · 47 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. 4d ago First seen · 47 lines · 53 tokens per session scan A 8ff0be5fd401

Subscribe to this mod's changes

duck-orient is a skill published in the GitHub repository LeeJuOh/claude-code-zero (51 stars, last pushed 4d ago), licensed MIT. It adds 53 tokens to every session and 969 once invoked, about $0.0003 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 2026-08-30.

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