Borrowing it
Nothing to install: this file belongs to djbelieny/nova. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/djbelieny/nova/main/.claude/skills/ghostwriter/SKILL.mdgit clone --depth 1 https://github.com/djbelieny/novaWrote 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.
[](https://agentmods.dev/skills/djbelieny/nova/ghostwriter)<a href="https://agentmods.dev/skills/djbelieny/nova/ghostwriter"><img src="https://agentmods.dev/badge/skills/djbelieny/nova/ghostwriter/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.
<a href="https://agentmods.dev/skills/djbelieny/nova/ghostwriter"><img src="https://agentmods.dev/badge/skills/djbelieny/nova/ghostwriter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00069 | $0.02549 |
| Opus 5.5 | $0.00028 | $0.01020 |
| Sonnet 5.5 | $0.00014 | $0.00510 |
| Haiku 4.5 | $0.00007 | $0.00255 |
Grade A, and why
ghostwriter 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ghostwriter - Autonomous Book Creation System
Overview
This skill transforms raw author materials (transcriptions, notes, interviews, outlines) into complete, professionally formatted books. It operates autonomously through a structured pipeline that:
- Extracts Voice Profile - Analyzes source materials to capture the author's unique voice, cognitive patterns, and intellectual posture
- Designs Book Architecture - Creates coherent narrative structure with chapters, parts, and transformational journey
- Writes Complete Manuscript - Produces all content maintaining consistent voice and method
- Formats for Publishing - Exports print-ready DOCX and PDF with professional book layout
Quick Start
When the user provides source materials (transcriptions, notes, audio files, outlines), follow this workflow:
PHASE 0 - VOICE EXTRACTION (MANDATORY)
Analyze all provided source materials and extract:
- Cognitive patterns: How the author thinks and structures arguments
- Sentence rhythm: Typical sentence length, cadence, and flow
- Argument logic: How they build and connect ideas
- Emotional distance: Level of personal engagement vs. academic detachment
- Intellectual posture: Authoritative, conversational, prophetic, teaching, etc.
- Recurring phrases: Signature expressions and vocabulary preferences
- Core convictions: The beliefs that drive their message
Output: Voice Profile v1.0 document for user approval
PHASE 1 - STRUCTURE PROPOSAL
Based on voice profile and source content, propose:
- Book architecture: Parts, chapters, logical flow
- Core method/framework: The author's unique system or approach
- Transformational journey: Reader's progression from problem to solution
- Chapter summaries: Brief description of each chapter's purpose
Output: Book Structure Proposal for user approval
PHASE 2 - PILOT CHAPTER
Write ONE complete chapter (typically Chapter 1 or most representative chapter):
- Apply voice profile meticulously
- Follow all formatting rules (see Formatting section)
- Chapter must be standalone and complete
- No references to "as we'll see later" or "in the previous chapter"
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 316 lines · 69 tokens per session scan A 0c908aeed6d1
ghostwriter is a skill published in the GitHub repository djbelieny/nova (5 stars, last pushed 3mo ago), licensed MIT. It adds 69 tokens to every session and 2,549 once invoked, about $0.0003 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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