reader-sim

reader-sim is a skill for Claude Code from haowjy/creative-writing-skills. It costs 47 tokens per session (455 once invoked), scanned A, original, Apache-2.0.

A reading exercise that simulates how a specified first-time reader experiences a draft. It reports reactions such as immersion, language appeal, character understanding, and curiosity.

In plain words
What is it for?
Use it to test a draft from a defined reader’s perspective and identify moments that feel engaging, unclear, or out of character.
Why use it?
It reveals where a draft may confuse or lose its intended audience, based on that reader’s knowledge and expectations.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the creative-writing-skills plugin — 28 skills, 5 agents shipped together

Good fit Use it to test a draft from a defined reader’s perspective and identify moments that feel engaging, unclear, or out of character.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/haowjy/creative-writing-skills/reader-sim
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.

Any agent
npx skills add haowjy/creative-writing-skills --skill reader-sim
Clone the repo
git clone --depth 1 https://github.com/haowjy/creative-writing-skills

Made for: Claude Code.

Or install creative-writing-skills, the plugin that ships this one along with the rest of its 28 skills, 5 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 reader-sim

README.md
[![agentmods](https://agentmods.dev/badge/skills/haowjy/creative-writing-skills/reader-sim/github.svg)](https://agentmods.dev/skills/haowjy/creative-writing-skills/reader-sim)
Your own site
<a href="https://agentmods.dev/skills/haowjy/creative-writing-skills/reader-sim"><img src="https://agentmods.dev/badge/skills/haowjy/creative-writing-skills/reader-sim/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 reader-sim

Your own site · 80×15
<a href="https://agentmods.dev/skills/haowjy/creative-writing-skills/reader-sim"><img src="https://agentmods.dev/badge/skills/haowjy/creative-writing-skills/reader-sim.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 455 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. Third-party audits
  • Socket pass 28 Oct 2026
  • Snyk pass 28 Oct 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00047 $0.00455
Opus 5.5 $0.00019 $0.00182
Sonnet 5.5 $0.00009 $0.00091
Haiku 4.5 $0.00005 $0.00046

Measured 10d ago against content hash 8b5196960168, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

reader-sim 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 10d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

plugin/claude/skills/reader-sim/SKILL.md · 42 lines

What it actually says

Reader Simulation

Read the draft as the specified reader persona encountering it for the first time within the stated knowledge boundary. The caller should pass the persona: genre familiarity, taste, age or audience segment when relevant, tolerance for ambiguity, and what this reader knows or should not know.

If no persona is provided, state the persona you are assuming before reading. Do not report a universal reader reaction.

Method

Load /creative-writing-skills:writing-principles if it isn't already loaded. Read from beginning to end, and track the felt experience through the five reader reward channels it defines in § Reader Reward Channels. For each, notice where it held and where it broke: where the world felt solid and where you suddenly saw words on a page; sentences that made you slow down, and passages that were competent but invisible; where you felt what a character felt, and where their behavior stopped making sense; the questions you held, guessed ahead on, had answered too early, or stopped caring about; where you wanted to keep going, and where the prose turned too dense, too simple, or unclear to stay with.

Not every channel needs equal coverage. Write where the experience was notable. In longer drafts, watch middle passages where attention often thins.

Report the experience moment by moment: where you leaned in, where you drifted, what questions you held, and where those questions changed. Stay in the reading rather than turning into a craft critic. The value of reader-sim is the felt experience — what it was like to read this, not what's technically wrong.

Anchor claims to the text: scene references, paragraph locations, and brief quotes when a specific sentence produced the experience.

Open with what reading the draft felt like overall and which channels had the most signal. Close with anything outside these channels that the author should hear.

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. 10d ago Changed · -10 lines · +10 tokens per session 8b5196960168
  2. 2mo ago First seen · 52 lines · 37 tokens per session scan A f0059cfa35ab

Subscribe to this mod's changes

reader-sim is a skill published in the GitHub repository haowjy/creative-writing-skills (567 stars, last pushed 10d ago), licensed Apache-2.0. It adds 47 tokens to every session and 455 once invoked, about $0.0002 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.

Related

reader-sim compared with skills from other repositories

reader-sim next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
reader-simhaowjy/creative-writing-skillsSkill56710d agoApache-2.0A47Claude Code
imagegenopenai/codexSkill133kyesterdayApache-2.0A113Codex
playwright-climicrosoft/playwrightSkill99kyesterdayApache-2.0A19Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill79k4d agoMITA200Claude Code, Codex
systematic-debuggingobra/superpowersSkill313k3d agoMITA21Claude Code
next-cache-components-adoptionvercel/next.jsSkill143kyesterdayMITA95Claude Code
next-partial-prefetching-adoptionvercel/next.jsSkill143kyesterdayMITA103Claude Code