Borrowing it
Nothing to install: this file belongs to sopaco/cowork-forge. 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/sopaco/cowork-forge/main/.agents/skills/rtk-skill/SKILL.mdgit clone --depth 1 https://github.com/sopaco/cowork-forgeWrote 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/sopaco/cowork-forge/rtk-skill)<a href="https://agentmods.dev/skills/sopaco/cowork-forge/rtk-skill"><img src="https://agentmods.dev/badge/skills/sopaco/cowork-forge/rtk-skill/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/sopaco/cowork-forge/rtk-skill"><img src="https://agentmods.dev/badge/skills/sopaco/cowork-forge/rtk-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 21 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00053 | $0.01760 |
| Opus 5.5 | $0.00021 | $0.00704 |
| Sonnet 5.5 | $0.00011 | $0.00352 |
| Haiku 4.5 | $0.00005 | $0.00176 |
Grade A, and why
rtk-skill 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.
This is a copy
100% identical to rtk-skill — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.
RTK Skill (Rust Token Killer)
RTK is a CLI proxy that filters and compresses command output before it reaches the LLM (typically 60–90% token savings).
Resolve the RTK command (read first)
Use conventional paths only — never machine-specific absolute paths like /Users/... or C:\Users\....
On Windows, tools deploy to %USERPROFILE%\.terrain\bin\ (also written as ~/.terrain/bin/ in Git Bash / PowerShell 7+). Binaries use .exe extensions; PATHEXT resolves rtk → rtk.exe.
| Priority | Command prefix | When |
|---|---|---|
| 1 | ~/.terrain/bin/rtk |
Terrain env integration or desktop app (see existence check below) |
| 2 | bunx @terrain-ai/rtk |
No Terrain install; needs network once |
| 3 | npx @terrain-ai/rtk |
Same as bunx if Bun unavailable |
Optional manifest (local, gitignored): .terrain/env/agent-tools.json — same ~/.terrain/bin/… conventions.
Existence check (cross-platform):
| Shell | Check |
|---|---|
| bash / zsh / Git Bash | [ -x ~/.terrain/bin/rtk ] || [ -x ~/.terrain/bin/rtk.exe ] |
| PowerShell | Test-Path "$HOME\.terrain\bin\rtk.exe" |
| cmd | if exist "%USERPROFILE%\.terrain\bin\rtk.exe" |
Shell rules:
- Invoke as
~/.terrain/bin/rtk <cmd>— tilde expands at word start in bash/zsh/Git Bash/PowerShell 7+. - Do not
export RTK="$(jq -r .rtk …)"then"$RTK"— quoted variables do not expand~. - Do not assume bare
rtkis on PATH.
Example (pick one prefix per session after the existence check):
# bash / Git Bash
if [ -x ~/.terrain/bin/rtk ] || [ -x ~/.terrain/bin/rtk.exe ]; then
PREFIX=~/.terrain/bin/rtk
else
PREFIX="bunx @terrain-ai/rtk"
fi
$PREFIX git status
# PowerShell
$PREFIX = if (Test-Path "$HOME\.terrain\bin\rtk.exe") { "$HOME\.terrain\bin\rtk.exe" } else { "bunx @terrain-ai/rtk" }
& $PREFIX git status
Verify:
~/.terrain/bin/rtk gain || bunx @terrain-ai/rtk gain
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 · 214 lines · 53 tokens per session scan A df03475370c1
rtk-skill is a skill published in the GitHub repository sopaco/cowork-forge (103 stars, last pushed 2mo ago), licensed MIT. It adds 53 tokens to every session and 1,760 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to rtk-skill, differing in 0 lines, and is treated as a copy.
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