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 agentmods add agents/zebbern/termstack/ctf_bonusgit clone --depth 1 https://github.com/zebbern/termstackWhat 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 | $0.00027 | $0.04624 |
| Opus 5 | $0.00014 | $0.02312 |
| Sonnet 5 | $0.00005 | $0.00925 |
| Haiku 4.5 | $0.00003 | $0.00462 |
Grade D, and why
ctf_bonus scanned grade D with 3 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 yesterday.
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.
Harvests environment variableshighData exfiltration
Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.
Step 1 (web): SQLi → dump credentials table Unrestricted tool accessmediumExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
| Run any command | `mcp_kali-tools_zebbern_exec` | Generic terminal fallback | Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| Web interaction | `fetch/*` or `execute/runInTerminal` (curl) | HTTP requests in the chain | 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 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.
- yesterday First seen · 458 lines · 27 tokens per session scan D 0f65ee0ad9f5
ctf_bonus is an agent published in the GitHub repository zebbern/termstack (5 stars, last pushed 4mo ago), with no licence file. It adds 27 tokens to every session and 4,624 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it D with 3 findings (harvests environment variables, unrestricted tool access, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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