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 skills add jackin-project/jackin-dev --skill jackin-checkout-prgit clone --depth 1 https://github.com/jackin-project/jackin-devWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/jackin-project/jackin-dev/jackin-checkout-pr)<a href="https://agentmods.dev/skills/jackin-project/jackin-dev/jackin-checkout-pr"><img src="https://agentmods.dev/badge/skills/jackin-project/jackin-dev/jackin-checkout-pr.svg" alt="Measured on agentmods" height="20"></a>- Socket pass
- Snyk pass
What 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 5.1 | $0.00042 | $0.00345 |
| Opus 5 | $0.00021 | $0.00172 |
| Sonnet 5 | $0.00008 | $0.00069 |
| Haiku 4.5 | $0.00004 | $0.00034 |
Grade A, and why
jackin-checkout-pr 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 8d ago.
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.
What it actually says
jackin-checkout-pr
Switch the working repo onto a PR's branch via gh pr checkout. Accepts a number, URL, or branch name.
Process
-
Resolve to a PR number. Number or URL → pass to
gh pr checkoutdirectly. Branch name →gh pr list --head <branch> --state all --json number -q '.[0].number'; no match → STOP, do not fall back to rawgit checkout. -
Guard the working tree.
git status --porcelain— if dirty, STOP and ask the operator to commit, stash, or discard first. Never auto-stash. Notegit branch --show-current(the way back). -
Check the PR is open.
gh pr view <N> --json state,headRefName.MERGEDorCLOSED→ warn (the branch may be stale) and confirm before proceeding. -
Switch.
gh pr checkout <N>. Verifygit branch --show-currentmatchesheadRefName. -
Report. Switched from
<old>to<headRefName>(PR #N). Way back:git switch <old>.
What ships with it
1 file 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.
- 8d ago First seen · 25 lines · 42 tokens per session scan A 288ddb285e18
jackin-checkout-pr is a skill published in the GitHub repository jackin-project/jackin-dev (3 stars, last pushed 6d ago), licensed Apache-2.0. It adds 42 tokens to every session and 345 once invoked, about $0.0002 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
prowler-commit
Creates professional git commits following conventional-commits format. Trigger: When creating commits, after completing code changes, when user asks to commit.
gh-auth-isolation
Safely manage multiple GitHub identities (EMU + personal) in agent workflows.
comet-github
A routing guide for Comet-related GitHub work. It directs requests about pull requests, issues, CI failures, ideas, and fixes to the appropriate review or implementation process.
github-skill
Work with GitHub via the gh CLI — clone repositories, create/list/merge pull requests, create/list issues, and run any other gh command (API calls, workflow runs, releases, repo administration). List operations return parsed JSON.
codex-autoresearch
Run autonomous, measurable experiments in a Git repository: change one hypothesis, verify a numeric metric, keep improvements, and revert failures. Use when the user wants Codex to keep iterating toward a numeric target in the foreground or as a detached background run. Do not use for ordinary one-shot coding…
changelog-composer
Generates structured changelogs and release notes from git history and PRs, classifying breaking changes, features, fixes, performance, docs. Triggers on: "generate changelog", "write release notes", "what changed since", "prepare release", "release notes for", "diff since tag".