plot-structure

plot-structure is a skill for Claude Code, Codex from bs779517/story-skills. It costs 70 tokens per session (810 once invoked), scanned A, original, MIT.

A writing-project skill for planning story structure, plot arcs, key events, foreshadowing, themes, and the order in which the narrative unfolds.

In plain words
What is it for?
Use it to choose an act structure, create or update plot arcs, maintain a story timeline, and track foreshadowing.
Why use it?
It gives a story’s major events and subplots a shared structure, making gaps and pacing problems easier to track.

Skill for Claude CodeCodex

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

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.

agentmods
npx agentmods add skills/bs779517/story-skills/plot-structure
Any agent
npx skills add bs779517/story-skills --skill plot-structure
Clone the repo
git clone --depth 1 https://github.com/bs779517/story-skills

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 plot-structure

README.md
[![agentmods](https://agentmods.dev/badge/skills/bs779517/story-skills/plot-structure.svg)](https://agentmods.dev/skills/bs779517/story-skills/plot-structure)
Your own site
<a href="https://agentmods.dev/skills/bs779517/story-skills/plot-structure"><img src="https://agentmods.dev/badge/skills/bs779517/story-skills/plot-structure.svg" alt="Measured on agentmods" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 810 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00070 $0.00810
Opus 5 $0.00035 $0.00405
Sonnet 5 $0.00014 $0.00162
Haiku 4.5 $0.00007 $0.00081

Measured 6d ago against content hash 158a1e955ee9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

plot-structure 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 6d 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/plot-structure/SKILL.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plot Structure

Overview

Plan and manage story arcs, plot points, foreshadowing, and narrative timeline. Each arc is a markdown file in plot/arcs/ with a chronological timeline maintained in plot/timeline.md. The plot index tracks all arcs, their status, and theme coverage.

Prerequisites

A story project must already exist (created via the story-init skill). Verify by checking for story.md in the project root.

Choosing a Story Structure

  1. Read story.md for genre and themes
  2. Consult references/structure-models.md for available structures
  3. Recommend a structure based on genre (default to three-act if unclear)
  4. Update plot/_index.md frontmatter structure field
  5. Populate the story structure section with the beat sheet

Creating an Arc

  1. Read story.md for themes
  2. Read plot/_index.md for existing arcs
  3. Read characters/_index.md to understand available characters
  4. Ask for:
    • Arc name
    • Type (main, subplot, character, thematic)
    • Which characters are involved
    • Which themes it serves
  5. Build the arc through conversation: setup, escalations, climax, resolution
  6. Write the file using references/arc-template.md
  7. Save to plot/arcs/{arc-name-kebab}.md
  8. Update plot/_index.md arcs table
  9. Update theme tracking in plot/_index.md
  10. If characters are referenced, verify they exist in characters/

Managing Plot Points

Plot points live within arc files in the "Plot Points" table. When adding a plot point:

  1. Read the relevant arc file
  2. Add the plot point to the table with chapter reference (if known)
  3. Add the event to plot/timeline.md in chronological order
  4. If the plot point involves foreshadowing, add it to the arc's foreshadowing table

Timeline Management

The timeline at plot/timeline.md is a chronological master list of all story events across all arcs.

When adding events:

  • Insert in chronological order
  • Link to the relevant arc and chapter
  • Keep entries concise (one line per event)

Read the full file on GitHub · 86 lines

Files

What ships with it

2 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.

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. 6d ago First seen · 86 lines · 70 tokens per session scan A 158a1e955ee9

Subscribe to this mod's changes

plot-structure is a skill published in the GitHub repository bs779517/story-skills (8 stars, last pushed yesterday), licensed MIT. It adds 70 tokens to every session and 810 once invoked, about $0.0003 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 2026-08-31.

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