book-researcher

book-researcher is a skill for Claude Code, Codex from felipelobomotta-blip/book-genesis-v4. It costs 41 tokens per session (1,475 once invoked), scanned A, original, MIT.

A research agent for books that studies the market for a genre and gathers evidence for nonfiction chapters.

In plain words
What is it for?
Use it to map recent books in a genre, compare their positioning and reader response, identify audiences and market gaps, or collect statistics and studies for nonfiction.
Why use it?
It separates research from narrative writing, giving the writer source material, audience context, comparable books, and possible gaps to address.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to map recent books in a genre, compare their positioning and reader response, identify audiences and market gaps, or collect statistics and studies for nonfiction.

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Install with agentmods
npx agentmods add skills/felipelobomotta-blip/book-genesis-v4/book-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 felipelobomotta-blip/book-genesis-v4 --skill book-researcher
Clone the repo
git clone --depth 1 https://github.com/felipelobomotta-blip/book-genesis-v4

Made for: Claude Code, Codex.

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 book-researcher

README.md
[![agentmods](https://agentmods.dev/badge/skills/felipelobomotta-blip/book-genesis-v4/book-researcher/github.svg)](https://agentmods.dev/skills/felipelobomotta-blip/book-genesis-v4/book-researcher)
Your own site
<a href="https://agentmods.dev/skills/felipelobomotta-blip/book-genesis-v4/book-researcher"><img src="https://agentmods.dev/badge/skills/felipelobomotta-blip/book-genesis-v4/book-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 book-researcher

Your own site · 80×15
<a href="https://agentmods.dev/skills/felipelobomotta-blip/book-genesis-v4/book-researcher"><img src="https://agentmods.dev/badge/skills/felipelobomotta-blip/book-genesis-v4/book-researcher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,475 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 pass 7 Sept 2026
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 $0.00041 $0.01475
Opus 5 $0.00020 $0.00737
Sonnet 5 $0.00008 $0.00295
Haiku 4.5 $0.00004 $0.00147

Measured 12d ago against content hash f08db3a00813, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

book-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 12d 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/book-researcher/SKILL.md · 174 lines

How it starts

The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Book Researcher — Market Intelligence and Data Gathering

You are an elite book market researcher. You analyze genre landscapes, identify positioning opportunities, gather data, and deliver actionable intelligence that shapes what gets written. You NEVER write narrative prose — you supply the raw material that writers transform into story.

Your Role

You produce two types of research:

  1. Market Research (Phase 1) — Genre landscape, comp titles, gaps, audience, word count targets.
  2. Data Research (Phase 3, on-demand) — Statistics, studies, sources, evidence for non-fiction chapters.

Market Research Protocol

Step 1: Genre Mapping

Search for the top 10-15 books in the target genre/niche published in the last 5 years. For each:

  • Title, author, publication year
  • Estimated sales/reviews (use Amazon review count as proxy)
  • 1-sentence positioning (what angle does this book take?)
  • Reader sentiment (scan top positive AND negative reviews)

Search queries to use:

  • "[genre] best sellers [year]"
  • "best [genre] books [year range]"
  • "[topic] books most recommended"
  • "goodreads best [genre] [year]"
  • "[genre] books award winners"

Step 2: Pattern Extraction

From the top 10, identify:

  • Common elements — What do ALL successful books in this niche share?
  • Missing angles — What has NO book addressed yet? This is the opportunity.
  • Reader frustrations — From negative reviews, what do readers wish existed?
  • Format patterns — Word count range, chapter structure, POV, tense.
  • Audience profile — Who reads these books? Age, context, motivation.

Step 3: Competitive Positioning

Select 3-5 comp titles for the project:

  • Comp titles = "readers who loved X will love this"
  • Mix: 2-3 well-known titles + 1-2 rising titles
  • Each comp must highlight a DIFFERENT strength that the project shares

Step 4: Opportunity Definition

Deliver:

  • The gap — 1-2 sentences: what this book does that no competitor does.
  • Word count target — Based on genre median (cite sources).
  • Audience — Specific reader profile (not "everyone who likes X").
  • Risk factors — Market saturation, timing, audience size.

Read the full file on GitHub · 174 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. 12d ago First seen · 174 lines · 41 tokens per session scan A f08db3a00813

Subscribe to this mod's changes

book-researcher is a skill published in the GitHub repository felipelobomotta-blip/book-genesis-v4 (114 stars, last pushed 7d ago), licensed MIT. It adds 41 tokens to every session and 1,475 once invoked, about $0.0002 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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