SagaSmith Call of Cthulhu 7e Suite Agent Skill

Run or maintain Call of Cthulhu 7e Classic/Pulp campaigns through SagaSmith's MCP-first Keeper, investigator, scenario, continuity…

Context cost
19.9k tokensestimated from the bundle, loaded when it triggers
Bundle
23 files · 79.8 kBtext throughout, nothing executable
Licence
Apache-2.0the author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Run or maintain Call of Cthulhu 7e Classic/Pulp campaigns through SagaSmith's MCP-first Keeper, investigator, scenario, continuity, development, chase, combat, Content Pack, branch, and snapshot workflows. Use for live investigations, campaign setup, characters, module review, clues, SAN, Luck, Push, growth, secrets, saves, restores, and regression play.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

gamedevmcp

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md7.1 kB · preview
--- name: sagasmith-coc-suite ---
6# SagaSmith Call of Cthulhu 7e Suite
7
8This repository is an Agent Skill, not a rules runtime. Full Runtime calls the
9sagasmith_coc MCP server. A host may prefix raw native tool names.
10
11## Start with zero trusted context
12
131. Call server_capabilities and storage_status. Require system coc7e,
14 sagasmith.content-package schema 2, progressive exposure, and native dynamic
15 tools. Do not continue live play through a host that cannot refresh native
16 schemas after tools/list_changed.
172. Call campaign_query(action="list"). For a new campaign, open an unbound
18 exposure, search for campaign_change, expose it, create the campaign, then
19 open a new exposure bound to the returned campaign_id. For an existing
20 campaign, read it and open the campaign-bound exposure.
213. Confirm game_phase and current branch/state. Search for the smallest
22 task-relevant tool set with exposure(action="search"), change it with
23 exposure(action="set"), consume tools/list_changed, and call the refreshed
24 native tools directly.
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md905 words
Files23
LicenceApache-2.0
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈100
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
19,850
on trigger
The instruction body and 22 supporting files, read only when the skill fires.
10.0%
of a 200k window
Ten skills this size would not fit in the window together.
050k100k150k200k context window

19.9k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

23 files, 79.8 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in. 2 files of its source are not in the download — listed after these, with why.

  • SKILL.md7.1 kB
  • NOTICE.md0.3 kB
  • README.md0.7 kB
  • README-en.md0.8 kB
  • agents/openai.yaml0.3 kB
  • references/mcp-contract.md12.1 kB
  • references/memory-ownership.md4.3 kB
  • references/workflows.md8.8 kB
  • templates/AGENTS.md1.4 kB
  • templates/IDENTITY.md1.0 kB
  • templates/SOUL.md0.9 kB
  • skills/coc7-campaign-manager/SKILL.md7.7 kB
  • skills/coc7-keeper/SKILL.md8.3 kB
  • skills/coc7-campaign-manager/agents/openai.yaml0.3 kB
  • skills/coc7-campaign-manager/references/CAMPAIGN_MANAGER_DEEP_REFERENCE.md5.2 kB
  • skills/coc7-keeper/agents/openai.yaml0.3 kB
  • skills/coc7-keeper/references/COMBAT_CHASE.md3.5 kB
  • skills/coc7-keeper/references/INVESTIGATION.md4.0 kB
  • skills/coc7-keeper/references/INVESTIGATOR_CREATION.md3.5 kB
  • skills/coc7-keeper/references/KEEPER_RULES.md3.0 kB
  • skills/coc7-keeper/references/KEEPER_TEMPLATES.md1.6 kB
  • skills/coc7-keeper/references/SANITY.md1.6 kB
  • skills/coc7-keeper/references/SCENARIO_INDEX.md3.1 kB

Not in the download

Not carried is a type a skill download does not hold. Take them from its source.

  • .gitattributesnot carried
  • images/Sagasmith.pngnot carried
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the download is 23 files — not the whole of its source: 2 files are left out. They are listed under the files, with why. The Apache-2.0 licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# SagaSmith Call of Cthulhu 7e Suite · 19.9k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/sagasmith-call-of-cthulhu-7e-suite/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/sagasmith-call-of-cthulhu-7e-suite" ] && { [ ! -e .claude/skills/sagasmith-call-of-cthulhu-7e-suite ] || { mv .claude/skills/sagasmith-call-of-cthulhu-7e-suite "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/sagasmith-call-of-cthulhu-7e-suite" .claude/skills/ && echo "Installed .claude/skills/sagasmith-call-of-cthulhu-7e-suite"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add sagasmithai/sagasmith-call-of-cthulhu-7e-suite

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/sagasmith-call-of-cthulhu-7e-suite/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/sagasmith-call-of-cthulhu-7e-suite/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/sagasmith-call-of-cthulhu-7e-suite" ] && { [ ! -e ~/.claude/skills/sagasmith-call-of-cthulhu-7e-suite ] || { mv ~/.claude/skills/sagasmith-call-of-cthulhu-7e-suite "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/sagasmith-call-of-cthulhu-7e-suite" ~/.claude/skills/ && echo "Installed ~/.claude/skills/sagasmith-call-of-cthulhu-7e-suite" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/sagasmith-call-of-cthulhu-7e-suite/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where. It appears as sagasmith-coc-suite in Gemini CLI, Codex, Copilot and Grok (its own name); Claude Code lists it by the folder name, sagasmith-call-of-cthulhu-7e-suite. Not in this download: 2 files of its source (the full list, and why). Take them from its source.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencesagasmithai/sagasmith-call-of-cthulhu-7e-suite

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

Reviews

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