Genshijin Crew (compressed subagent delegation guide)

A Claude Code skill that decides when and how to delegate code-location, small edits, and diff reviews to three ultra-compact 'caveman-style' subagents.

Dev & CodingAdvanced★ 427⑂ 45AI score 8/10Last updated: Sep 24, 2026

What it does

Gives a decision table for choosing between genshijin-investigator (locate code), genshijin-builder (edit 1–2 files), genshijin-reviewer (diff review) and the vanilla alternatives (Explore, Code Reviewer, main thread, architect agents).
Pins down a strict output contract per agent: investigator returns path:line — \symbol` — notelines (grep-able withpath:\d+), builder returns change range + verified:line or a terminal token liketoo-big., reviewer returns path:line: severity: issue. fix.` plus totals.
Exploits the fact that subagent tool-results are injected verbatim into the main context: compressed output cuts token cost to roughly a third, extending long sessions.
Documents chaining patterns (locate → edit → verify), parallel scouting with 2–3 investigators, direct single edits, plus hard prohibitions (never call builder without a located file, never chain it for a 5-file refactor, never ask reviewer for general feedback).

Who it's for

Heavy Claude Code users who keep running out of context mid-task.
Developers navigating large codebases with repeated search / patch / review loops.
Anyone who wants machine-parsable subagent output to feed grep or automation.

Example uses

"Where is every caller of AuthService?" → investigator returns only a compact path:line list; main thread picks one or two and hands paths to builder.
Broad investigation: fire three investigators in parallel in one message (definitions / callers / tests) and merge results in the main thread.
Run reviewer over a branch diff to get 🔴/🟡/🔵 findings with totals, then triage fixes by severity.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/aiskillstore/marketplace/HEAD/pending/interfacex-co-jp/genshijin-crew/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)

Download the ZIP with the button below.
In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.

↓ Download ZIP

Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the pending/interfacex-co-jp/genshijin-crew folder from the GitHub repo aiskillstore/marketplace into my ~/.claude/skills/aiskillstore-genshijin-crew/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/aiskillstore/marketplace.git && mkdir -p ~/.claude/skills && cp -r marketplace/pending/interfacex-co-jp/genshijin-crew ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

Open a terminal.
Clone the repository: git clone https://github.com/aiskillstore/marketplace.git
Create the skills directory: mkdir -p ~/.claude/skills
Copy the skill: cp -r marketplace/pending/interfacex-co-jp/genshijin-crew ~/.claude/skills/
This guide assumes the genshijin-investigator, genshijin-builder, and genshijin-reviewer subagents exist. Locate their definitions in the genshijin agent set and install them under ~/.claude/agents/.
Restart Claude Code and trigger it with phrases like "delegate to subagent" or "save context" to confirm it loads.

View source on GitHub ↗