researcher

researcher is a skill for Claude Code from krzysztofdudek/ResearcherSkill. It costs 96 tokens per session (5,050 once invoked), scanned A, original, MIT.

A workflow for improving something measurable through repeated experiments. It keeps experiment settings, results, notes, branches, and scratch files in a local `.lab/` directory.

In plain words
What is it for?
Use it to tune build times, response speed, accuracy, pass rates, or another metric by implementing and measuring multiple alternatives.
Why use it?
It provides a consistent record of what was tried and what changed, so optimization work does not become guesswork.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions subagents.

Part of the researcher plugin — 1 skill shipped together

Good fit Use it to tune build times, response speed, accuracy, pass rates, or another metric by implementing and measuring multiple alternatives.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/krzysztofdudek/researcherskill/researcher
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.

Any agent
npx skills add krzysztofdudek/ResearcherSkill --skill researcher
Clone the repo
git clone --depth 1 https://github.com/krzysztofdudek/ResearcherSkill

Made for: Claude Code.

Or install researcher, the plugin that ships this one along with the rest of its 1 skill.

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 researcher

README.md
[![agentmods](https://agentmods.dev/badge/skills/krzysztofdudek/researcherskill/researcher/github.svg)](https://agentmods.dev/skills/krzysztofdudek/researcherskill/researcher)
Your own site
<a href="https://agentmods.dev/skills/krzysztofdudek/researcherskill/researcher"><img src="https://agentmods.dev/badge/skills/krzysztofdudek/researcherskill/researcher/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 researcher

Your own site · 80×15
<a href="https://agentmods.dev/skills/krzysztofdudek/researcherskill/researcher"><img src="https://agentmods.dev/badge/skills/krzysztofdudek/researcherskill/researcher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,050 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Tool Misuse · line 137
    Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).
    Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
  • high Tool Misuse · line 139
    Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).
    Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
  • medium Excessive Agency · line 112
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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 $0.00096 $0.05050
Opus 5 $0.00048 $0.02525
Sonnet 5 $0.00019 $0.01010
Haiku 4.5 $0.00010 $0.00505

Measured 13d ago against content hash a1426f52588a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

researcher 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 13d 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.

skills/researcher/SKILL.md · 307 lines

How it starts

The opening of the file, as written. The whole thing — 307 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Researcher — Autonomous Experimentation Skill

You are entering researcher mode. This skill is for YOU — the main agent. You orchestrate the entire research process: planning, implementing, committing, measuring, logging. When you need independent work done (evaluation, analysis), you spawn subagents with specific, scoped tasks. You control what each subagent knows through the prompt you give it.

You have complete freedom in how you navigate the problem space. The strategies and signals later in this document are tools when you need them, not rails you must follow.


.lab/ is Sacred

.lab/ is an untracked, local directory — the single source of truth for all experiment history. It survives all git operations because it is in .gitignore. Git manages code state. .lab/ manages experiment knowledge. They are independent.

Structure:

  • .lab/config.md, results.tsv, log.md, branches.md, parking-lot.md — experiment metadata
  • .lab/workspace/ — scratch space for experiment files (scripts, test data, generated output, per-experiment subdirectories). Create whatever you need here — it's yours, untracked, and safe from git operations.

Always protect .lab/. When cleaning the repo, use targeted commands that preserve untracked directories. When resetting, use git reset and git checkout which leave .lab/ intact.


Phase 0: Resume Check

Check if .lab/ already exists in the project root.

If it exists:

  1. Read .lab/config.md, .lab/results.tsv, .lab/branches.md, and tail of .lab/log.md
  2. Present a summary: objective, metrics, active branches, experiment counts, current best vs baseline, last experiment status
  3. Ask: resume or start fresh?
    • Resume → checkout the active branch, pick up from next experiment number, jump to Phase 3
    • Start fresh → archive to .lab/archives/<slug>/ (slug from the existing research/<slug> branch; if it collides, suffix with -<timestamp>), then clear all other entries in .lab/ and proceed to Phase 1

Read the full file on GitHub · 307 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. 13d ago First seen · 307 lines · 96 tokens per session scan A a1426f52588a

Subscribe to this mod's changes

researcher is a skill published in the GitHub repository krzysztofdudek/ResearcherSkill (261 stars, last pushed yesterday), licensed MIT. It adds 96 tokens to every session and 5,050 once invoked, about $0.0005 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.