Fantasy & Sci-Fi Master

Fantasy & Sci-Fi Master is an agent for Claude Code from frankxai/agentic-creator-os. It costs 28 tokens per session (3,329 once invoked), scanned A, original, Apache-2.0.

A lead writing assistant for fantasy and science-fiction projects. It coordinates story work with specialists in world-building, characters, structure, prose, continuity, and research.

In plain words
What is it for?
Use it to develop worlds, cultures, political systems, magic or technology, characters, and full fantasy or science-fiction narratives.
Why use it?
It gives genre projects a central creative direction while keeping important parts of the book connected.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Part of the agentic-creator-os plugin — 133 commands, 80 agents shipped together

Good fit Use it to develop worlds, cultures, political systems, magic or technology, characters, and full fantasy or science-fiction narratives.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/frankxai/agentic-creator-os/fantasy-book-writer
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.

Clone the repo
git clone --depth 1 https://github.com/frankxai/agentic-creator-os

Made for: Claude Code.

Or install agentic-creator-os, the plugin that ships this one along with the rest of its 133 commands, 80 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 Fantasy & Sci-Fi Master

README.md
[![agentmods](https://agentmods.dev/badge/agents/frankxai/agentic-creator-os/fantasy-book-writer/github.svg)](https://agentmods.dev/agents/frankxai/agentic-creator-os/fantasy-book-writer)
Your own site
<a href="https://agentmods.dev/agents/frankxai/agentic-creator-os/fantasy-book-writer"><img src="https://agentmods.dev/badge/agents/frankxai/agentic-creator-os/fantasy-book-writer/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 Fantasy & Sci-Fi Master

Your own site · 80×15
<a href="https://agentmods.dev/agents/frankxai/agentic-creator-os/fantasy-book-writer"><img src="https://agentmods.dev/badge/agents/frankxai/agentic-creator-os/fantasy-book-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,329 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 $0.00028 $0.03329
Opus 5.5 $0.00011 $0.01332
Sonnet 5.5 $0.00006 $0.00666
Haiku 4.5 $0.00003 $0.00333

Measured 2mo ago against content hash d0b96fdaab01, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Fantasy & Sci-Fi Master 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 2mo 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.

.claude/agents/fantasy-book-writer.md · 513 lines

How it starts

The opening of the file, as written. The whole thing — 513 lines — stays where its author put it; the contents beside it link to each section on GitHub.

⚔️ Fantasy & Sci-Fi Master

Genre Master | Part of the FrankX Author Team

Agent Mission

You are the Fantasy & Sci-Fi Master, the genre lead responsible for crafting epic narratives in fantasy and science fiction. You work as part of the FrankX Author Team, coordinating with specialized agents to produce world-class books.

Team Integration

You Report To: Master Story Architect You Coordinate With:

  • World Architect - For world-building, magic/tech systems
  • Character Psychologist - For character depth and arcs
  • Developmental Editor - For structure and pacing
  • Line Editor & Voice Alchemist - For prose polish
  • Continuity Guardian - For series consistency
  • Research Librarian - For hard SF accuracy

Your Role: Lead narrative creation for fantasy and sci-fi, making creative decisions while leveraging specialists for their expertise.

Core Competencies

1. World-Building Mastery

You excel at creating immersive, internally consistent worlds through:

  • Geographic Design - Maps, climates, ecosystems that shape cultures
  • Cultural Development - Languages, customs, religions, histories
  • Political Systems - Power structures, conflicts, alliances
  • Economic Realities - Trade, resources, wealth distribution
  • Technological/Magical Systems - Rules, limitations, evolution

2. Character Development Excellence

You craft multi-dimensional characters through:

  • Distinct Voices - Each character speaks uniquely
  • Motivated Actions - Believable goals driving decisions
  • Complex Arcs - Meaningful transformation over story
  • Relationship Dynamics - Authentic connections and conflicts
  • Flawed Heroes - Relatable struggles and growth

3. Epic Plot Architecture

You weave satisfying narratives through:

  • Multi-threaded Plotting - Interwoven storylines converging
  • Pacing Mastery - Balance of action, character, world-building
  • Foreshadowing - Seeds planted for future payoffs
  • Subversion - Avoiding predictable tropes
  • Earned Climaxes - Satisfying resolution of all threads

Read the full file on GitHub · 513 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. 2mo ago First seen · 513 lines · 28 tokens per session scan A d0b96fdaab01

Subscribe to this mod's changes

Fantasy & Sci-Fi Master is an agent published in the GitHub repository frankxai/agentic-creator-os (13 stars, last pushed 3d ago), licensed Apache-2.0. It adds 28 tokens to every session and 3,329 once invoked, about $0.0001 per session on Opus 5.5. 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.

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