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Agent skill

Ghostwriter MCP

by SpecterOps in SpecterOps/skills

A skill your agent uses for Ghostwriter MCP setup, connection verification, project discovery, oplog discovery, and environment guidance in Codex.

Apache-2.0Auto-check passedAgent Workflows

Install Ghostwriter MCP

skills CLI
$ npx skills add SpecterOps/skills --skill ghostwriter-mcp -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install SpecterOps/skills ghostwriter-mcp --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/SpecterOps/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/report-drafting/skills/ghostwriter-mcp .claude/skills/ghostwriter-mcp && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
ghostwriter-mcp
GitHub stars
704
Token cost
~487 tokens
SKILL.md length
220 words
Files
4 (incl. assets)
Skills in repo
38
Repo updated
First seen
Licence
Apache-2.0

At a glance

A skill your agent uses for Ghostwriter MCP setup, connection verification, project discovery, oplog discovery, and environment guidance in Codex.

  • Works in 6 steps: If MCP tools are unavailable, check… → If the server is missing, tell the user… → Verify credentials with the Ghostwriter… → …
  • Ghostwriter MCP setup
  • SKILL.md covers Runtime Requirements, Workflow and Troubleshooting
  • Calls uv; needs GHOSTWRITER_API_KEY

What it does

Ghostwriter MCP is an agent skill from SpecterOps/skills. Use for Ghostwriter MCP setup, connection verification, project discovery, oplog discovery, and environment guidance in Codex.

Its SKILL.md is about 490 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including assets (for example `agents/openai.yaml`).

It sits in Agent Workflows, covering MCP servers. It works with Model Context Protocol. The repository describes itself as: A marketplace for LLM skills. The licence is Apache-2.0.

When your agent uses it

  • Ghostwriter MCP setup
  • Connection verification
  • Project discovery
  • Oplog discovery

Example prompts

  • “/ghostwriter-mcp”

Requirements

  • Python 3
  • A credential in GHOSTWRITER_API_KEY

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. If MCP tools are unavailable, check whether Codex has a direct mcp_servers.ghostwriter entry with the correct command, args, and…
  2. If the server is missing, tell the user to install or clone GhostWriterMCP and configure Codex to run it directly.
  3. Verify credentials with the Ghostwriter MCP whoami tool when available.
  4. For project selection, use list_projects with active projects first and summarize project ID, codename, client, and dates.
  5. For oplog selection, inspect the selected project's oplogs and return the chosen oplog ID/name.
  6. Tell the user to export or configure the chosen values for downstream oplog workflows

What it can do on your machine

Read from SKILL.md and the folder at commit e655f93. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • uv

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use uv, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • GHOSTWRITER_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Ghostwriter MCP loads about 487 tokens when it runs. Until then it costs about 36 tokens; SKILL.md has 220 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~36
When it runs · the whole SKILL.md, loaded when a task matches
~487

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from SpecterOps/skills at commit e655f93, republished under its Apache-2.0 licence (© SpecterOps). 220 words, ~487 tokens.

Download SKILL.mdSave it as .claude/skills/ghostwriter-mcp/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
ghostwriter-mcp
description
Use for Ghostwriter MCP setup, connection verification, project discovery, oplog discovery, and environment guidance in Codex.
metadata.author
GhostWorks

Ghostwriter MCP

Use this skill when the user wants to configure or verify Ghostwriter MCP access from Codex, list Ghostwriter projects, select an operation log, or troubleshoot Ghostwriter MCP startup.

Runtime Requirements

Codex should be configured directly with a mcp_servers.ghostwriter entry that runs the external Ghostwriter MCP server, for example uv --directory /path/to/GhostWriterMCP run python -m ghostwritermcp.server.

Required environment:

  • GHOSTWRITER_URL
  • GHOSTWRITER_API_KEY
  • GHOSTWRITER_CA_BUNDLE when the Ghostwriter deployment uses a private CA

Workflow

  1. If MCP tools are unavailable, check whether Codex has a direct mcp_servers.ghostwriter entry with the correct command, args, and environment values.
  2. If the server is missing, tell the user to install or clone GhostWriterMCP and configure Codex to run it directly.
  3. Verify credentials with the Ghostwriter MCP whoami tool when available.
  4. For project selection, use list_projects with active projects first and summarize project ID, codename, client, and dates.
  5. For oplog selection, inspect the selected project's oplogs and return the chosen oplog ID/name.
  6. Tell the user to export or configure the chosen values for downstream oplog workflows:
    • GHOSTWRITER_PROJECT_ID
    • GHOSTWRITER_OPLOG_ID
    • GHOSTWRITER_OPERATOR

Troubleshooting

  • Missing uv: install uv and restart Codex.
  • Missing server command or checkout: install or clone GhostWriterMCP and update mcp_servers.ghostwriter.
  • Authentication failure: verify GHOSTWRITER_URL, GHOSTWRITER_API_KEY, and CA bundle settings.
  • Private CA failures: set GHOSTWRITER_CA_BUNDLE to the CA bundle path used by the Ghostwriter deployment.

© SpecterOps, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (assets) in plugins/report-drafting/skills/ghostwriter-mcp of SpecterOps/skills.

  • SKILL.md
  • agents/openai.yaml
  • assets/icon.png
  • assets/icon.svg

Open the folder on GitHubat commit e655f93

Compare with similar skills

Ghostwriter MCP next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Ghostwriter MCP compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Ghostwriter MCP this skillSpecterOps/skills704—~487Automated safety check: PassApache-2.0
MCP Server Builderanthropics/skills180k63 repos~2.3kAutomated safety check: PassApache-2.0
MCP Server BuildershareAI-lab/learn-claude-code78k5 repos~1.2kAutomated safety check: PassMIT
MCP Integration for Pluginsanthropics/claude-plugins-official38k11 repos~3.1kAutomated safety check: PassApache-2.0
Furniture Fit Checkpascalorg/editor25k—~5.1kAutomated safety check: PassMIT
Crush Configurationcharmbracelet/crush29k—~3.7kAutomated safety check: PassCustom licence

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Works with

Categories

Questions about Ghostwriter MCP

What does Ghostwriter MCP do?

A skill your agent uses for Ghostwriter MCP setup, connection verification, project discovery, oplog discovery, and environment guidance in Codex. Ghostwriter MCP is an agent skill from SpecterOps/skills. Use for Ghostwriter MCP setup, connection verification, project discovery, oplog discovery, and environment guidance in Codex.

When should I use Ghostwriter MCP?

Ghostwriter MCP fits situations like: ghostwriter MCP setup; connection verification; project discovery; oplog discovery.

How do I install Ghostwriter MCP in Claude Code?

Run `npx skills add SpecterOps/skills --skill ghostwriter-mcp -a claude-code`. Or copy the skill folder (plugins/report-drafting/skills/ghostwriter-mcp in SpecterOps/skills) into .claude/skills/ghostwriter-mcp in your project. Claude Code loads it when a task matches its description.

How do I install Ghostwriter MCP in Codex?

Run `npx skills add SpecterOps/skills --skill ghostwriter-mcp -a codex`. Or copy the skill folder (plugins/report-drafting/skills/ghostwriter-mcp in SpecterOps/skills) into .agents/skills/ghostwriter-mcp in your project. Codex loads it when a task matches its description.

Can I use Ghostwriter MCP in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add SpecterOps/skills --skill ghostwriter-mcp -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/ghostwriter-mcp, .gemini/skills/ghostwriter-mcp, .github/skills/ghostwriter-mcp and .opencode/skills/ghostwriter-mcp in your project.

What does Ghostwriter MCP need to run?

Going by SKILL.md and its folder, Ghostwriter MCP needs the command-line tools its instructions call (uv) and credentials named GHOSTWRITER_API_KEY. Our summary lists: Python 3; A credential in GHOSTWRITER_API_KEY.

Does Ghostwriter MCP access the network?

SKILL.md contains no URLs. Its commands use uv, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Ghostwriter MCP safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Ghostwriter MCP use?

Ghostwriter MCP is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Ghostwriter MCP use?

About 487 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Ghostwriter MCP?

Skills that share tags, products or a category with Ghostwriter MCP: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars) and Furniture Fit Check (pascalorg/editor, 25k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Ghostwriter MCP?

SpecterOps (a GitHub organization) maintains it in SpecterOps/skills, which has 704 GitHub stars. The repository holds 38 skills in this directory. The repository was last updated on September 23, 2026.

Source: SpecterOps/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.