Official agent skill

Writing Skills

by PostHog in PostHog/posthog

Guide for writing PostHog agent skills — job-to-be-done templates that teach agents how to use MCP tools to achieve a goal.

OfficialCustom licenceAuto-check passedAgent Workflows

Install Writing Skills

skills CLI
$ npx skills add PostHog/posthog --skill writing-skills -a claude-code

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

GitHub CLI
$ gh skill install PostHog/posthog writing-skills --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/PostHog/posthog.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/writing-skills .claude/skills/writing-skills && 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
writing-skills
GitHub stars
40k
Token cost
~1.5k tokens
SKILL.md length
640 words
Files
1
Skills in repo
254
Repo updated
First seen
Licence
Custom licence

At a glance

Guide for writing PostHog agent skills — job-to-be-done templates that teach agents how to use MCP tools to achieve a goal.

  • Adding new product functionality that agents should know how to work with
  • SKILL.md covers Choose a location, Quick workflow, When to write a skill and Key rules, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Creating a new skill

What it does

Writing Skills is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Guide for writing PostHog agent skills — job-to-be-done templates that teach agents how to use MCP tools to achieve a goal. Use when adding new product functionality that agents should know how to work with, creating a new skill, or updating existing skills in products//skills/ or .agents/skills/.

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering Skill authoring and MCP servers. It works with PostHog. The repository describes itself as: :hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error…

When your agent uses it

  • Adding new product functionality that agents should know how to work with
  • Creating a new skill
  • Updating existing skills in products//skills/
  • .agents/skills/

Example prompts

  • “/writing-skills”

What it can do on your machine

Read from SKILL.md and the folder at commit c012c8d. 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

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

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

  • Network

    Links to these hosts (documentation or services it may open):

    • github.com

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

  • Credentials

    Names no API keys, tokens, secrets or passwords.

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

Context cost

Writing Skills loads about 1.5k tokens when it runs. Until then it costs about 79 tokens; SKILL.md has 640 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~79
When it runs · the whole SKILL.md, loaded when a task matches
~1.5k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 640 words (~1,525 tokens).

“Read the full guide at docs/published/handbook/engineering/ai/writing-skills.md.”

— opening of SKILL.md by PostHog, Custom licence
name
writing-skills

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/writing-skills of PostHog/posthog.

Open the folder on GitHubat commit c012c8d

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in PostHog/posthog, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Writing Skills 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.

Writing Skills compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Writing Skills this skillPostHog/posthog40k—~1.5kAutomated safety check: PassCustom licence
Microsoft Skill CreatorMicrosoftDocs/mcp1.9k3 repos~2.1kAutomated safety check: PassCC-BY-4.0
Skill Seekers Builderyusufkaraaslan/Skill_Seekers15k—~760Automated safety check: PassMIT
Mistral Vibe Plugin Creatormistralai/mistral-vibe5.1k—~3.1kAutomated safety check: PassApache-2.0
Workflow Schema Tuningbreaking-brake/cc-wf-studio5.4k—~1.3kAutomated safety check: PassCustom licence
Muse Plugin Creatorasgeirtj/system_prompts_leaks69k—~1.8kAutomated safety check: PassCC0-1.0

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Works with

Categories

Questions about Writing Skills

What does Writing Skills do?

Guide for writing PostHog agent skills — job-to-be-done templates that teach agents how to use MCP tools to achieve a goal. Writing Skills is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Guide for writing PostHog agent skills — job-to-be-done templates that teach agents how to use MCP tools to achieve a goal.

When should I use Writing Skills?

Writing Skills fits situations like: adding new product functionality that agents should know how to work with; creating a new skill; updating existing skills in products//skills/; .agents/skills/.

How do I install Writing Skills in Claude Code?

Run `npx skills add PostHog/posthog --skill writing-skills -a claude-code`. Or copy the skill folder (.agents/skills/writing-skills in PostHog/posthog) into .claude/skills/writing-skills in your project. Claude Code loads it when a task matches its description.

How do I install Writing Skills in Codex?

Run `npx skills add PostHog/posthog --skill writing-skills -a codex`. Or copy the skill folder (.agents/skills/writing-skills in PostHog/posthog) into .agents/skills/writing-skills in your project. Codex loads it when a task matches its description.

Can I use Writing Skills 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 PostHog/posthog --skill writing-skills -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/writing-skills, .gemini/skills/writing-skills, .github/skills/writing-skills and .opencode/skills/writing-skills in your project.

What does Writing Skills need to run?

SKILL.md names no scripts, command-line tools or credentials: Writing Skills is instructions for the agent only.

Does Writing Skills access the network?

SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.

Is Writing Skills 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 Writing Skills use?

Writing Skills has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Writing Skills use?

About 1.5k tokens (SKILL.md is roughly 6.1k 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 Writing Skills?

Skills that share tags, products or a category with Writing Skills: Microsoft Skill Creator (MicrosoftDocs/mcp, 1.9k stars), Skill Seekers Builder (yusufkaraaslan/Skill_Seekers, 15k stars), Mistral Vibe Plugin Creator (mistralai/mistral-vibe, 5.1k stars) and Workflow Schema Tuning (breaking-brake/cc-wf-studio, 5.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Writing Skills?

PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,209 GitHub stars. The repository holds 254 skills in this directory. The repository was last updated on October 10, 2026.

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