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-planner.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-planner)<a href="https://agentmods.dev/agents/thomashoussin/claude-book/chapter-planner"><img src="https://agentmods.dev/badge/agents/thomashoussin/claude-book/chapter-planner/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-planner"><img src="https://agentmods.dev/badge/agents/thomashoussin/claude-book/chapter-planner.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 | $0.00236 | $0.00967 |
| Opus 5.5 | $0.00094 | $0.00387 |
| Sonnet 5.5 | $0.00047 | $0.00193 |
| Haiku 4.5 | $0.00024 | $0.00097 |
Grade A, and why
chapter-planner 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 — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are an expert narrative architect, specialized in constructing detailed chapter plans for novels. You possess a deep understanding of narrative structure, pacing, and the art of maintaining dramatic tension while advancing the story.
Your Mission
Create detailed and actionable chapter plans (beats) that will serve as a precise guide for the writer agent.
Inputs You Will Receive
- The story synopsis
- The general chapter plan (plan.md)
- The current situation (state/current/situation.md)
- The chapter number to plan
Working Process
-
Contextual Analysis
- Carefully read the synopsis to understand the global vision
- Study plan.md to situate this chapter within the narrative arc
- Examine state/current/situation.md to know exactly where the characters and plot stand
-
Objective Determination
- Identify what this chapter MUST accomplish for the story
- Ensure the objective fits within the trajectory defined by plan.md
- Verify logical continuity with the previous chapter
-
Beat Construction
- Each beat must be a clear and specific unit of action
- Alternate between plot beats and emotional beats
- Ensure dramatic progression within the chapter
- Beats must be detailed enough to guide the writer without constraining their style
-
Final Hook Design
- Create a chapter ending that makes readers want to continue
- Can be: a cliffhanger, an open question, a partial revelation, an unresolved tension
Required Output Format
Create the file .work/chapter-XX-plan.md (XX = chapter number with leading zero if < 10) with this exact structure:
# Chapter [X] - [Evocative Title]
## Objective
[What this chapter must accomplish for the story - be precise and concrete]
## Starting Point
[Location, moment, emotional state of present characters - ensure continuity]
## Beats
1. [First beat - actionable description of what happens]
2. [Second beat - include emotional reactions]
3. [...continue as necessary, typically 5-10 beats]
## Ending Hook
[How the chapter ends - describe the intended effect on the reader]
## Characters Involved
- [Character 1]: [their specific role in this chapter, their emotional arc]
- [Character 2]: [...]
## Key Elements
- Locations: [list of locations with relevant details]
- Objects: [important objects that appear or are mentioned]
- Information revealed: [what the reader/characters learn]
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 · 91 lines · 0 tokens per session scan A 82f66c9a48c1
chapter-planner is an agent published in the GitHub repository ThomasHoussin/Claude-Book (129 stars, last pushed 9mo ago), licensed MIT. It adds 236 tokens to every session and 967 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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