Hunk is a terminal application for reviewing code changes created by coding agents, with views for multi-file diffs, inline annotations, and Git-backed reviews. Developers use it to inspect, navigate, and approve changesets from the command line.
Borrowing it
Nothing to install: this file belongs to modem-dev/hunk. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/modem-dev/hunk/main/.agents/skills/hunk-extensions/SKILL.mdgit clone --depth 1 https://github.com/modem-dev/hunkWrote 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/modem-dev/hunk/hunk-extensions)<a href="https://agentmods.dev/skills/modem-dev/hunk/hunk-extensions"><img src="https://agentmods.dev/badge/skills/modem-dev/hunk/hunk-extensions/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/modem-dev/hunk/hunk-extensions"><img src="https://agentmods.dev/badge/skills/modem-dev/hunk/hunk-extensions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector 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 | $0.00105 | $0.00255 |
| Opus 5.5 | $0.00042 | $0.00102 |
| Sonnet 5.5 | $0.00021 | $0.00051 |
| Haiku 4.5 | $0.00011 | $0.00026 |
Grade A, and why
hunk-extensions 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 3d 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
hunk-extensions
This file is a pointer. The instructions live in the installed hunk CLI so they always match its version.
Before anything else, load them and follow them:
hunk skill show hunk-extensions
Hunk versions before 0.24 do not have hunk skill show. If it fails, print the bundled skill's path instead, then read that file and follow it:
hunk skill path hunk-extensions
If hunk is not on PATH, ask the user to install Hunk first: https://hunk.dev/docs/start/install/
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.
- 3d ago Changed · +6 lines f1434bd2874a
- 16d ago Changed · -337 lines f49de66dd4a4
- 29d ago Changed · +2 lines 26fa2c2403a9
- 1mo ago Changed · +6 lines 03893d1df2ff
- 1mo ago Changed · +12 lines ce8fd0ba1101
- 1mo ago Changed · +5 lines 1c12916d976b
- 1mo ago Changed 01cff1732e24
- 1mo ago Changed 5f263af71b26
- 1mo ago Changed 493984970fc7
- 1mo ago First seen · 331 lines · 105 tokens per session scan A 811a4679598d
hunk-extensions is a skill published in the GitHub repository modem-dev/hunk (9,709 stars, last pushed today), licensed MIT. It adds 105 tokens to every session and 255 once invoked, about $0.0004 per session on Opus 5.5. 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
gh-find-prs
Survey open Codewhale PRs and triage each for mergeability and disposition against the real landing branch.
github
Skill "github" from Hmbown/Codewhale, covering github, when to use, setup, workflow and non-goals.
revdiff
Review diffs, files, and documents with inline annotations in a TUI overlay, or answer questions about revdiff usage, configuration, themes, and keybindings. Opens revdiff in agterm/tmux/zellij/herdr/kitty/wezterm/cmux/ghostty/iterm2/emacs-vterm, captures annotations, and addresses them. Works in git, hg, and jj repos…
agent-debug-ci
Investigate failed scheduled or nightly GitHub Actions runs on the default branch, determine whether the failure is reproducible and repository-owned, implement the smallest evidence-backed fix, validate it, and open a pull request. Use when a failed nightly CI event starts an agent, or when the standard CI or…
shadow-verify
Dispatch a parallel adversarial verifier wave after any high-stakes sub-agent investigation (code reviews, audits, findings reports, large refactors, gap analyses) — or whenever a sub-agent asserts a claim with high-confidence language, since confidence is a trigger, not a verdict. Use when sub-agent output will drive…
fix-pr
One-verb pipeline for the operator's highest-frequency manual loop: fetch a PR's unresolved reviewer feedback (inline review comments, review-summary bodies, and issue-level conversation comments) and failing CI checks, triage each issue via parallel read-only probes, fix the validated items in an isolated managed…