Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/vercel/next.js/gh-stacknpx skills add vercel/next.js --skill gh-stackgit clone --depth 1 https://github.com/vercel/next.jsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00080 | $0.02162 |
| Opus 5 | $0.00040 | $0.01081 |
| Sonnet 5 | $0.00016 | $0.00432 |
| Haiku 4.5 | $0.00008 | $0.00216 |
Grade A, and why
gh-stack scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 184 lines — stays where its author put it; the contents beside it link to each section on GitHub.
gh-stack
gh stack is a GitHub CLI extension for stacked branches and pull
requests. A stack is an ordered chain of branches rooted on a trunk, where each branch has one PR
based on the branch below it, so a reviewer sees only that layer's diff.
gh stack prints a stack trunk-first, left to right:
(main) <- auth <- api <- frontend
Left is the bottom, right is the top. auth is based on main and merges first;
frontend merges last. up moves toward the top, away from trunk; down moves toward it.
Foundational work belongs at the bottom, code that depends on it above. For how to choose the
layers, read references/stack-design.md.
Setup
gh extension install github/gh-stack
git config rerere.enabled true # remember conflict resolutions
git config remote.pushDefault origin # required if the repo has more than one remote
Non-interactive use
gh stack branches on whether stdout is a TTY. Piped, most commands error cleanly or print
static text; under a PTY the same commands open a prompt or a full-screen TUI and block forever.
Agent harnesses differ, so always pass the flags below instead of relying on that detection.
Multiple remotes: never run push, submit, sync, rebase, or link without
--remote <name> unless remote.pushDefault is configured. checkout and trunk have no
--remote flag and require the config.
| Always run | Never run bare | Why |
|---|---|---|
gh stack view --json |
gh stack view |
opens a TUI under a PTY |
gh stack submit --auto |
gh stack submit |
prompts for a title per new PR |
gh stack merge <target> --yes |
gh pr merge |
gh pr merge cannot merge a stack |
gh stack init <branch>... |
gh stack init |
prompts for branch names |
gh stack add <branch> |
gh stack add |
prompts for a name, and fails even when piped |
gh stack checkout <target> |
gh stack checkout |
opens a selection menu |
gh stack up / down / top / bottom |
gh stack switch |
switch is menu-only |
| — | gh stack modify |
TUI-only, no non-interactive path |
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 184 lines · 80 tokens per session scan A aae70e433d42
gh-stack is a skill published in the GitHub repository vercel/next.js (142,020 stars, last pushed yesterday), licensed MIT. It adds 80 tokens to every session and 2,162 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
bestax-layout-scaffold
Scaffold a complete, responsive page layout with @allxsmith/bestax-bulma — app shells/dashboards, marketing/landing pages, centered auth/settings pages, and card-grid catalogs. Use when building a full page or overall app layout (not a single component).
shadcn
Manages shadcn components and projects — adding, searching, fixing, debugging, styling, and composing UI, including chat interfaces. Provides project context, component docs, and usage examples. Applies when working with shadcn/ui, component registries, presets, --preset codes, or any project with a components.json…
migrate-radix-to-base
Migrates React projects and components from Radix UI to Base UI. Use when asked to migrate from radix, move to base-ui, convert radix primitives, or switch a shadcn project's base library. Handles single components ("migrate accordion") and whole projects.
theme-component
Add complete theme support for one Recharts component. Invoke with the component name, for example theme-component XAxis.
typescript
Write strongly-typed TypeScript code in Recharts.
example
Create new example charts for Recharts documentation website.