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 skills/batteryshark/rekit/syscall-tracenpx skills add batteryshark/rekit --skill syscall-tracegit clone --depth 1 https://github.com/batteryshark/rekitWhat 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 | $0.00068 | $0.00405 |
| Opus 5 | $0.00034 | $0.00202 |
| Sonnet 5 | $0.00014 | $0.00081 |
| Haiku 4.5 | $0.00007 | $0.00040 |
Grade A, and why
syscall-trace 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
Syscall Tracer
⚡ Dynamic tier — runs the target. Run only where you don't mind the risk.
When to use
The core behavioral question: what does this sample actually do to the system?
syscall-trace runs it under a syscall tracer and tells you the files it touched, the
network it reached, the processes it spawned, and its syscall profile — the real
ground truth behind static findings.
What it does
Runs the target under strace (Linux) or dtruss (macOS) with a timeout, then
summarizes: files opened, network (connect/socket), execs, and a syscall histogram.
Consent & prerequisites
- Dynamic:
rekit run --allow-dynamic syscall-trace <target>(or--yes-i-consent/REKIT_ALLOW_DYNAMIC=1for a direct call). strace(Linux) ordtruss(macOS) on PATH. On macOS,dtrussneeds root and a permissive SIP; on Linux,straceneeds ptrace permissions. Absent →doctormarks it not-ready with an install hint.
Usage
rekit run --allow-dynamic syscall-trace ./sample --timeout 20
rekit run --allow-dynamic syscall-trace ./sample --format json | ...
Pipe the recovered files/IPs into ioc-extract for a report.
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.
- 3d ago First seen · 38 lines · 68 tokens per session scan A 924abf063615
syscall-trace is a skill published in the GitHub repository batteryshark/rekit (11 stars, last pushed 24d ago), licensed Apache-2.0. It adds 68 tokens to every session and 405 once invoked, about $0.0003 per session on Opus 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.
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