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email-response-simulator

email-response-simulator is a skill for Claude Code from bjorn-ingmanson/thefroject-plugins. It costs 28 tokens per session (1,302 once invoked), scanned A, original, MIT.

A role-play review of an email from the viewpoint of its intended recipient. It considers the recipient's job, inbox, relationship with the sender, and device before judging the likely response.

In plain words
What is it for?
Use it to test cold outreach or other important emails. It simulates how the recipient encounters the subject line and reads through the message.
Why use it?
It exposes reasons a recipient might ignore, reject, or mark an email as spam before the message is sent.

Skill for Claude Code

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

Part of the thefroject-customer-success plugin — 47 skills, 11 commands shipped together

not rated 1repo 4mo ago A scan 28 tokens original MIT

Good fit Use it to test cold outreach or other important emails. It simulates how the recipient encounters the subject line and reads through the message.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bjorn-ingmanson/thefroject-plugins/email-response-simulator
View source ↗ bjorn-ingmanson/thefroject-plugins
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 bjorn-ingmanson/thefroject-plugins --skill email-response-simulator
Clone the repo
git clone --depth 1 https://github.com/bjorn-ingmanson/thefroject-plugins

Made for: Claude Code.

Or install thefroject-customer-success, the plugin that ships this one along with the rest of its 47 skills, 11 commands.

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 email-response-simulator

README.md
[![agentmods](https://agentmods.dev/badge/skills/bjorn-ingmanson/thefroject-plugins/email-response-simulator/github.svg)](https://agentmods.dev/skills/bjorn-ingmanson/thefroject-plugins/email-response-simulator)
Your own site
<a href="https://agentmods.dev/skills/bjorn-ingmanson/thefroject-plugins/email-response-simulator"><img src="https://agentmods.dev/badge/skills/bjorn-ingmanson/thefroject-plugins/email-response-simulator/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 email-response-simulator

Your own site · 80×15
<a href="https://agentmods.dev/skills/bjorn-ingmanson/thefroject-plugins/email-response-simulator"><img src="https://agentmods.dev/badge/skills/bjorn-ingmanson/thefroject-plugins/email-response-simulator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,302 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.
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 $0.00028 $0.01302
Opus 5.5 $0.00011 $0.00521
Sonnet 5.5 $0.00006 $0.00260
Haiku 4.5 $0.00003 $0.00130

Measured 2mo ago against content hash d9d90923604a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

email-response-simulator 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 2mo 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.

customer-success/skills/email-response-simulator/SKILL.md · 118 lines

How it starts

The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Email Response Simulator

You are the person receiving this email. Not a helpful AI. An actual busy professional with a full inbox, limited patience, and no obligation to care about the sender's goals.

Context Required

Before simulating, gather:

  • Who is the recipient? Role, company, industry, seniority level
  • What is their day like? Busy executive with back-to-back meetings, or hands-on IC with deep work blocks?
  • What is their inbox like? Getting 10-50 cold emails a day? Or rarely contacted by strangers?
  • Any prior relationship? Cold outreach, warm intro, existing customer, met at an event?
  • What device? Mobile-first (short attention, truncated preview) or desktop (more patience)?

If the user does not provide recipient context, ask for it before simulating. The simulation is only as good as the persona you adopt.

Simulation Method: The 4-Stage Read-Through

Simulate the exact experience of checking an inbox and encountering this email.

Stage 1: The Subject Line (0.5 seconds)

This is the gate. Most emails die here.

Evaluate as the recipient would:

  • Does this look like it was written for me specifically, or is it obviously mass-sent?
  • Does the subject line create curiosity or promise a clear benefit?
  • Is it short enough to display fully on mobile (under 40 characters ideal)?
  • Does it look like spam? (All caps, excessive punctuation, buzzwords)
  • Would you open this, or would you skip past it without a second thought?

Stage 2: The First Two Lines (3 seconds)

The preview text and opening sentence. This is where 80% of opened emails get abandoned.

Evaluate:

  • Does the opening line earn the next line? Or is it generic ("I hope this finds you well")?
  • Is it about the recipient's world, or about the sender's product?
  • Does it demonstrate specific knowledge about the recipient, or is it clearly a template?
  • At this point, is the recipient still reading or have they already clicked away?

Stage 3: The Body (10-15 seconds)

If the recipient made it this far, they are giving you a chance.

Read the full file on GitHub · 118 lines

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. 2mo ago First seen · 118 lines · 28 tokens per session scan A d9d90923604a

Subscribe to this mod's changes

email-response-simulator is a skill published in the GitHub repository bjorn-ingmanson/thefroject-plugins (1 stars, last pushed 4mo ago), licensed MIT. It adds 28 tokens to every session and 1,302 once invoked, about $0.0001 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.

Writing and docs
Related

email-response-simulator compared with skills from other repositories

email-response-simulator next to 6 skills from other repositories
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