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 zebbern/termstack --skill wayback-scangit clone --depth 1 https://github.com/zebbern/termstackWrote 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/zebbern/termstack/wayback-scan)<a href="https://agentmods.dev/skills/zebbern/termstack/wayback-scan"><img src="https://agentmods.dev/badge/skills/zebbern/termstack/wayback-scan/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/zebbern/termstack/wayback-scan"><img src="https://agentmods.dev/badge/skills/zebbern/termstack/wayback-scan.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 | $0.00004 | $0.03543 |
| Opus 5 | $0.00002 | $0.01772 |
| Sonnet 5 | $0.00001 | $0.00709 |
| Haiku 4.5 | $0.00000 | $0.00354 |
Grade B, and why
wayback-scan scanned grade B with 1 finding 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 5d 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo mv gau /usr/local/bin/ The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 5d ago First seen · 519 lines · 4 tokens per session scan B 68850ddd8c80
wayback-scan is a skill published in the GitHub repository zebbern/termstack (5 stars, last pushed 4mo ago), with no licence file. It adds 4 tokens to every session and 3,543 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
github-wayback-recovery
Recover deleted GitHub content using the Wayback Machine and Archive.org APIs. Use when repositories, files, issues, PRs, or wiki pages have been deleted from GitHub but may persist in web archives. Covers CDX API queries, URL patterns, and systematic recovery workflows.
ship
Fully automated ship workflow. Merges the base branch, runs tests, audits coverage, reviews the diff, generates a CHANGELOG entry, bumps the version, commits, pushes, and creates the PR. Use when asked to "ship", "create a PR", or "open a pull request".
seam-onboard
Install Seamless awareness for the current agent client. Use only when the user explicitly asks to onboard Seamless or invokes this skill. Configure the client's hooks and MCP server if needed, ask whether guidance belongs globally or in this project, append a marker-wrapped block to AGENTS.md for Codex or CLAUDE.md…
plan-ceo-review
Mega plan review from a product/CEO perspective. Challenges premise, challenges scope, maps alternatives, reviews architecture through 11 sections, and offers an outside voice. Use when asked to "CEO review", "mega plan review", "product review this plan", or when shipping a significant new product feature.
plan-eng-review
Engineering plan review. Reviews a plan document for architecture, code quality, test coverage, and performance before implementation begins. Produces a coverage diagram, failure modes map, and parallelization strategy. Use when asked to "review this plan", "eng review", or "architecture review".
retro
Weekly engineering retrospective. Analyzes commit history, work patterns, and code quality metrics for the time window. Team-aware: identifies the user, then analyzes every contributor with per-person praise and growth opportunities. Use when asked for a "retro", "engineering retrospective", or "weekly summary".