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 seabbs/skills --skill show-diffgit clone --depth 1 https://github.com/seabbs/skillsWrote 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/seabbs/skills/show-diff)<a href="https://agentmods.dev/skills/seabbs/skills/show-diff"><img src="https://agentmods.dev/badge/skills/seabbs/skills/show-diff/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/seabbs/skills/show-diff"><img src="https://agentmods.dev/badge/skills/seabbs/skills/show-diff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00052 | $0.00480 |
| Opus 5.5 | $0.00021 | $0.00192 |
| Sonnet 5.5 | $0.00010 | $0.00096 |
| Haiku 4.5 | $0.00005 | $0.00048 |
Grade A, and why
show-diff 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 1mo 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
Show Diff
Open a new tmux pane that displays current changes via diffview.nvim,
so the user can review in a side-by-side viewer instead of scrolling
terminal output.
When to use
- After making more than a handful of edits, surface them for review
- User asks to see the diff, open a diff viewer, or review the changes
- Before asking the user to approve committing a larger change
Skip when edits are tiny, when not inside tmux, or when the user has already reviewed the changes in this turn.
How to run
bash ~/code/seabbs/dotfiles/scripts/show-diff.sh $ARGUMENTS
The script opens a right-hand split running nvim +DiffviewOpen <range>
rooted at the repo top-level.
Choosing the rev-range
Shortcuts the script understands:
| Argument | Expands to | Use when… |
|---|---|---|
| (none) | working tree vs HEAD | changes are uncommitted |
last |
HEAD~1..HEAD |
reviewing just the last commit |
last N or N |
HEAD~N..HEAD |
reviewing the last N commits |
pr |
origin/<base>...HEAD (base from gh pr view) |
on a branch with an open PR |
| any other value | passed through verbatim | explicit rev range, e.g. main...HEAD |
If the agent has both committed and uncommitted work on a feature
branch with an open PR, pr is the fastest choice.
Requirements
- Running inside tmux (script errors out otherwise)
- Inside a git repository
diffview.nvimavailable in neovim (already configured in the user's dotfiles)
After opening
Tell the user the pane is up and what range it shows. Do not try to drive the nvim instance from the agent side.
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.
- 1mo ago First seen · 57 lines · 52 tokens per session scan A c7811d8c4948
show-diff is a skill published in the GitHub repository seabbs/skills (6 stars, last pushed 1mo ago), licensed MIT. It adds 52 tokens to every session and 480 once invoked, about $0.0002 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 2026-08-31.
Other skills, from other repositories
merge-batch
Prepare and merge an owner-selected PR batch with contributor credit and exact-candidate admission. Use for a pasted PR list; combined focused validation is diagnostic, and every actual landing still requires its applicable checks and authorization.
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.
release-helper
Ensures configuration and code changes are released correctly. Use PROACTIVELY whenever you edit config.json, change any setting, or fix a configuration bug in this project, so the change reaches production.