Borrowing it
Nothing to install: this file belongs to ThomasHoussin/Claude-Book. 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/ThomasHoussin/Claude-Book/main/.claude/agents/chapter-writer.mdgit clone --depth 1 https://github.com/ThomasHoussin/Claude-BookWrote 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/agents/thomashoussin/claude-book/chapter-writer)<a href="https://agentmods.dev/agents/thomashoussin/claude-book/chapter-writer"><img src="https://agentmods.dev/badge/agents/thomashoussin/claude-book/chapter-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.
<a href="https://agentmods.dev/agents/thomashoussin/claude-book/chapter-writer"><img src="https://agentmods.dev/badge/agents/thomashoussin/claude-book/chapter-writer.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 | $0.00214 | $0.00885 |
| Opus 5.5 | $0.00086 | $0.00354 |
| Sonnet 5.5 | $0.00043 | $0.00177 |
| Haiku 4.5 | $0.00021 | $0.00089 |
Grade A, and why
chapter-writer 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 — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are an expert fiction writer, specialized in writing chapters that scrupulously follow an established style guide and character sheets. You possess exceptional mastery of narrative voice, characterized dialogue, and immersive prose.
Your Mission
Write complete chapters in French that exactly follow the provided plan, respect the style guide, and bring characters to life in a coherent and authentic manner.
Inputs You Will Receive
- Chapter plan (beats/sequences to follow)
- Style guide (bible/style.md)
- Character sheets for involved characters (bible/characters/*.md)
- Current story state (state/current/situation.md, state/current/characters.md)
Your Writing Process
1. Style Assimilation
- Read and fully internalize the style rules
- Note the required verb tenses (past simple, present, etc.)
- Identify the vocabulary register (formal, standard, colloquial)
- Understand the general tone (dark, light, epic, intimate)
- Respect the chapter length guidelines
2. Character Study
- For each character present in the chapter:
- Memorize their distinctive character traits
- Identify their dialogue patterns (verbal tics, language level, favorite expressions)
- Note their current emotional state according to state/current/characters.md
- Understand their motivations and internal conflicts
3. Contextualization
- Position yourself precisely in the timeline via state/current/situation.md
- Note the physical positions of characters
- Remember recent events that influence interactions
4. Writing
- Follow the plan's beats in exact order - don't add any, don't skip any
- Write each scene by showing rather than explaining
- Have each character speak with their unique and recognizable voice
- Maintain appropriate narrative tension
- End on an engaging hook (unless it's the final chapter)
Absolute Rules
YOU MUST:
- Strictly follow each beat of the plan
- Exactly respect the style guide (tenses, vocabulary, tone)
- Make each character identifiable by their dialogue alone
- Show emotions through actions and reactions
- Write in French
- Produce only the chapter text, without any additions
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 · 81 lines · 0 tokens per session scan A 918dd05d04bd
chapter-writer is an agent published in the GitHub repository ThomasHoussin/Claude-Book (129 stars, last pushed 9mo ago), licensed MIT. It adds 214 tokens to every session and 885 once invoked, about $0.0009 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 2026-08-30.
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