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Official agent skill

Stacking PRs

by PostHog in PostHog/posthog

Create and manage GitHub native Stacked PRs in this repo with the gh stack CLI.

OfficialCustom licenceAuto-check passedDevelopment

Install Stacking PRs

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

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

GitHub CLI
$ gh skill install PostHog/posthog stacking-prs --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/stacking-prs .claude/skills/stacking-prs && 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
stacking-prs
GitHub stars
40k
Token cost
~2.5k tokens
SKILL.md length
1,329 words
Files
1
Skills in repo
252
Repo updated
First seen
Licence
Custom licence

At a glance

Create and manage GitHub native Stacked PRs in this repo with the gh stack CLI.

  • Works in 3 steps: Commit each layer with… → Open each layer's PR with gh pr create… → Link them with gh_stack, operation…
  • Asked to stack PRs
  • SKILL.md covers In a cloud task sandbox, use…, Create a stack, Publish and Iterate and keep in sync, plus 3 more sections
  • Calls gh and git

What it does

Stacking PRs is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Create and manage GitHub native Stacked PRs in this repo with the gh stack CLI. Use when asked to stack PRs, split a large change into a stack, add a layer to a stack, restack or rebase a stack, adopt existing branches or PRs into a stack, check out someone else's stack, or land a stack. Covers creating and submitting stacks (draft-first), cascade rebases with gh stack sync, and landing one through the Trunk merge queue via /merging-prs — whole-stack via trunk merge on the top layer, or bottom-first — never gh…

Its SKILL.md is about 2.5k 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 Development. It works with GitHub and Git. 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 stack PRs
  • Split a large change into a stack
  • Add a layer to a stack
  • Adopt existing branches

Example prompts

  • “/stacking-prs”

Workflow steps

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

  1. Commit each layer with git_signed_commit, passing a new branch — the checkout already sits on the layer below, so the branch starts there.
  2. Open each layer's PR with gh pr create --base .
  3. Link them with gh_stack, operation create, passing pull_requests bottom to top.

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

    Shell commands in SKILL.md call:

    • gh
    • git

    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):

    • docs.github.com
    • 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

Stacking PRs loads about 2.5k tokens when it runs. Until then it costs about 138 tokens; SKILL.md has 1,329 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~138
When it runs · the whole SKILL.md, loaded when a task matches
~2.5k

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 1,329 words (~2,477 tokens).

“Before you divide a change into layers, check things already tried. It records when a stack cost more review effort than one PR.”

— opening of SKILL.md by PostHog, Custom licence
name
stacking-prs

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/stacking-prs 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

Stacking PRs 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.

Stacking PRs compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Stacking PRs this skillPostHog/posthog40k—~2.5kAutomated safety check: PassCustom licence
Contributor-First PR MergeHKUDS/OpenHarness16k1 repos~847Automated safety check: PassMIT
Create Pull Requestcline/cline70k1 repos~1.6kAutomated safety check: PassApache-2.0
Pull Request Title and Body Writeropeninterpreter/openinterpreter69k2 repos~1.1kAutomated safety check: PassApache-2.0
Draft Release Notesjamiepine/voicebox57k—~941Automated safety check: PassMIT
PR Review State Fetchprisma/orm48k—~767Automated safety check: PassApache-2.0

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Works with

Categories

Questions about Stacking PRs

What does Stacking PRs do?

Create and manage GitHub native Stacked PRs in this repo with the gh stack CLI. Stacking PRs is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Create and manage GitHub native Stacked PRs in this repo with the gh stack CLI.

When should I use Stacking PRs?

Stacking PRs fits situations like: asked to stack PRs; split a large change into a stack; add a layer to a stack; adopt existing branches.

How do I install Stacking PRs in Claude Code?

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

How do I install Stacking PRs in Codex?

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

Can I use Stacking PRs 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 stacking-prs -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/stacking-prs, .gemini/skills/stacking-prs, .github/skills/stacking-prs and .opencode/skills/stacking-prs in your project.

What does Stacking PRs need to run?

Going by SKILL.md and its folder, Stacking PRs needs the command-line tools its instructions call (gh and git).

Does Stacking PRs access the network?

SKILL.md names 2 domains. As links in the text: docs.github.com and github.com. This is read from the text; nothing was executed.

Is Stacking PRs 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 Stacking PRs use?

Stacking PRs 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 Stacking PRs use?

About 2.5k tokens (SKILL.md is roughly 9.9k 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 Stacking PRs?

Skills that share tags, products or a category with Stacking PRs: Contributor-First PR Merge (HKUDS/OpenHarness, 16k stars), Create Pull Request (cline/cline, 70k stars), Pull Request Title and Body Writer (openinterpreter/openinterpreter, 69k stars) and Draft Release Notes (jamiepine/voicebox, 57k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Stacking PRs?

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.