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Official agent skill

Setting Up Data Catalog

by PostHog in PostHog/posthog

Populates and maintains a project's data catalog (semantic layer): canonical metrics, trust marks (certifications) on warehouse tables/views, and reviewed table relationships.

OfficialCustom licenceAuto-check passedData & Analytics

Install Setting Up Data Catalog

skills CLI
$ npx skills add PostHog/posthog --skill setting-up-data-catalog -a claude-code

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

GitHub CLI
$ gh skill install PostHog/posthog setting-up-data-catalog --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/products/data_catalog/skills/setting-up-data-catalog .claude/skills/setting-up-data-catalog && 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
setting-up-data-catalog
GitHub stars
40k
Token cost
~2.1k tokens
SKILL.md length
996 words
Files
1
Skills in repo
252
Repo updated
First seen
Licence
Custom licence

At a glance

Populates and maintains a project's data catalog (semantic layer): canonical metrics, trust marks (certifications) on warehouse tables/views, and reviewed table relationships.

  • Works in 4 steps: Certify the sources. Survey the… → Discover joins with evidence. For… → Seed metrics from insights. Mine the… → …
  • Asked to set up / seed / bootstrap the data catalog
  • SKILL.md covers Flow 1 — Setup (seeding a new…, Flow 2 — Maintenance… and Related
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Setting Up Data Catalog is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Populates and maintains a project's data catalog (semantic layer): canonical metrics, trust marks (certifications) on warehouse tables/views, and reviewed table relationships. Use when asked to set up / seed / bootstrap the data catalog or semantic layer, to catalog a project's metrics, to certify or deprecate data sources, to propose or review table joins, or to work through the proposal review queue. To use an existing catalog to answer a business-number question, see querying-posthog-data instead. Trigger…

Its SKILL.md is about 2.1k 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 Data & Analytics, covering Data governance. 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

  • Asked to set up / seed / bootstrap the data catalog
  • Catalog a projects metrics
  • Deprecate data sources
  • Review table joins

Example prompts

  • “Use the setting-up-data-catalog skill to populate and maintains a project's data catalog (semantic layer): canonical metrics, trust marks…”
  • “/setting-up-data-catalog”

Workflow steps

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

  1. Certify the sources. Survey the most-queried warehouse tables/views. For the ones the team
  2. Discover joins with evidence. For plausible table pairs, sample both sides with
  3. Seed metrics from insights. Mine the project's most-used insights (query system.insights),
  4. Add remaining metrics above the bar. Propose any other metric that was asked for or that you

What it can do on your machine

Read from SKILL.md and the folder at commit 10f9ad7. 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 sql).

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

  • Network

    No URLs in SKILL.md.

    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

Setting Up Data Catalog loads about 2.1k tokens when it runs. Until then it costs about 170 tokens; SKILL.md has 996 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~170
When it runs · the whole SKILL.md, loaded when a task matches
~2.1k

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 996 words (~2,138 tokens).

“The data catalog is a per-project inventory of three things that otherwise live only in people's heads: metrics (what a number canonically means), certifications (which of many similar tables/views to trust), and relationships (how tables join). It describes existing data…”

— opening of SKILL.md by PostHog, Custom licence
name
setting-up-data-catalog

Read the full SKILL.md on GitHub

Files

Just SKILL.md in products/data_catalog/skills/setting-up-data-catalog of PostHog/posthog.

Open the folder on GitHubat commit 10f9ad7

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

Setting Up Data Catalog 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.

Setting Up Data Catalog compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Setting Up Data Catalog this skillPostHog/posthog40k—~2.1kAutomated safety check: PassCustom licence
Jeecg Systemjeecgboot/skills239—~3.2kAutomated safety check: PassApache-2.0
Telemetry Standardssupabase/supabase111k—~2kAutomated safety check: PassApache-2.0
Prod TelemetryUsefulSoftwareCo/executor4.1k—~1.9kAutomated safety check: PassMIT
Openalgo Chart Indicatormarketcalls/openalgo-charts140—~3.4kAutomated safety check: NotesApache-2.0
Data Quality Frameworkswshobson/agents40k11 repos~1.1kAutomated safety check: PassMIT

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Works with

Categories

Questions about Setting Up Data Catalog

What does Setting Up Data Catalog do?

Populates and maintains a project's data catalog (semantic layer): canonical metrics, trust marks (certifications) on warehouse tables/views, and reviewed table relationships. Setting Up Data Catalog is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Populates and maintains a project's data catalog (semantic layer): canonical metrics, trust marks (certifications) on warehouse tables/views, and reviewed table relationships.

When should I use Setting Up Data Catalog?

Setting Up Data Catalog fits situations like: asked to set up / seed / bootstrap the data catalog; catalog a projects metrics; deprecate data sources; review table joins.

How do I install Setting Up Data Catalog in Claude Code?

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

How do I install Setting Up Data Catalog in Codex?

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

Can I use Setting Up Data Catalog 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 setting-up-data-catalog -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/setting-up-data-catalog, .gemini/skills/setting-up-data-catalog, .github/skills/setting-up-data-catalog and .opencode/skills/setting-up-data-catalog in your project.

What does Setting Up Data Catalog need to run?

SKILL.md names no scripts, command-line tools or credentials: Setting Up Data Catalog is instructions for the agent only.

Does Setting Up Data Catalog access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Setting Up Data Catalog 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 Setting Up Data Catalog use?

Setting Up Data Catalog 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 Setting Up Data Catalog use?

About 2.1k tokens (SKILL.md is roughly 8.6k 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 Setting Up Data Catalog?

Skills that share tags, products or a category with Setting Up Data Catalog: Jeecg System (jeecgboot/skills, 239 stars), Telemetry Standards (supabase/supabase, 111k stars), Prod Telemetry (UsefulSoftwareCo/executor, 4.1k stars) and Openalgo Chart Indicator (marketcalls/openalgo-charts, 140 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Setting Up Data Catalog?

PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,182 GitHub stars. The repository holds 252 skills in this directory. The repository was last updated on October 8, 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.