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 batteryshark/rekit --skill minimal-executablegit clone --depth 1 https://github.com/batteryshark/rekitWrote 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/batteryshark/rekit/minimal-executable)<a href="https://agentmods.dev/skills/batteryshark/rekit/minimal-executable"><img src="https://agentmods.dev/badge/skills/batteryshark/rekit/minimal-executable/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/batteryshark/rekit/minimal-executable"><img src="https://agentmods.dev/badge/skills/batteryshark/rekit/minimal-executable.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 | $0.00083 | $0.00569 |
| Opus 5.5 | $0.00033 | $0.00228 |
| Sonnet 5.5 | $0.00017 | $0.00114 |
| Haiku 4.5 | $0.00008 | $0.00057 |
Grade A, and why
minimal-executable 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
Minimal Executable Builder
Generate a small, deterministic executable without a compiler, linker, imports, or language runtime. The runner writes the artifact and validates the fields it owns; it never executes the result.
Workflow
- Choose
elf,pe, ormachoand a supported architecture. - Pick an exit status from 0 through 255.
- Generate the artifact and inspect the JSON evidence.
- If execution matters, test separately on the real target OS/CPU and record that
evidence as
native-proven.
rekit run minimal-executable elf --arch x86_64 --exit-code 42 --out tiny-elf --report json
rekit run minimal-executable pe --arch i386 --out tiny.exe --report json
rekit run minimal-executable macho --arch arm64 --out tiny-macho --report json
Supported shapes
| Format | Architectures | Shape | Initial proof |
|---|---|---|---|
| ELF | x86_64, i386 |
ELF header + one RX PT_LOAD + direct Linux exit syscall |
structurally validated |
| PE | x86_64, i386 |
DOS/COFF/optional headers + one RX .text, no imports |
structurally validated |
| Mach-O | arm64 |
__PAGEZERO + RX __TEXT + LC_UNIXTHREAD, direct Darwin syscall |
static research artifact |
The PE entry point returns the requested value to the Windows process-start thunk.
The arm64 Mach-O is intentionally labeled a research artifact: modern release
macOS normally requires dyld plus an ad-hoc signature and can reject static
MH_EXECUTE before entry. Parser acceptance does not change that claim.
Evidence discipline
structural: the runner re-parsed its own required headers and offsets.tool-readable: an available hostfilecommand recognized the artifact.loader-accepted: only claim after the target OS loader maps and starts it.native-proven: only claim after execution on the actual target OS and CPU.
The runner reports only the first two. Do not promote those results to loader or native proof without a separate execution record.
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.
- 1mo ago First seen · 48 lines · 83 tokens per session scan A 3f11dcdb3c68
minimal-executable is a skill published in the GitHub repository batteryshark/rekit (20 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 83 tokens to every session and 569 once invoked, about $0.0003 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 2026-08-30.
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