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 dslsdzc/rev-skills --skill re-fp-runtimegit clone --depth 1 https://github.com/dslsdzc/rev-skillsWrote 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/dslsdzc/rev-skills/re-fp-runtime)<a href="https://agentmods.dev/skills/dslsdzc/rev-skills/re-fp-runtime"><img src="https://agentmods.dev/badge/skills/dslsdzc/rev-skills/re-fp-runtime/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/dslsdzc/rev-skills/re-fp-runtime"><img src="https://agentmods.dev/badge/skills/dslsdzc/rev-skills/re-fp-runtime.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00074 | $0.03103 |
| Opus 5 | $0.00037 | $0.01551 |
| Sonnet 5 | $0.00015 | $0.00621 |
| Haiku 4.5 | $0.00007 | $0.00310 |
Grade A, and why
re-fp-runtime 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.
函数式运行时逆向（Haskell / OCaml）
何时使用 / 何时不用
- 用：Haskell/OCaml 产物（GHC RTS 符号、OCaml block 头特征），需要还原闭包/堆对象、求值顺序、模式匹配分支
- 用：OCaml 原生/字节码产物判别与字节码分析（ocamlrun 脚本头特征）
- 不用：命令式语言产物（各归各技能：C++ → [[re-cpp-abi]]、Go → [[re-go]]、Rust → [[re-rust]]）
- 不用：只需函数逻辑且控制流完整（函数式产物控制流打散，直接反编译收益低，见步骤 4）
工具准备
readelf / llvm-nm（符号分析）
- 安装与验证见 [[re-cpp-abi]] 工具准备
ghc 工具链（Haskell 侧，可选）
- Linux/macOS: GHC 安装包（
apt install ghc/brew install ghc/ ghcup）；Windows: ghcup（winget install ghcup或官网安装器）；验证:ghc --version - 用途: 同版本编译对照产物，验证 closure/info table 形态（GHC 版本差异大）
ocamlobjinfo / ocamlopt（OCaml 侧，可选）
- Linux/macOS: OCaml 工具链（
apt install ocaml/brew install ocaml）；Windows: opam（winget install OCaml.opam）或官网安装器；验证:ocamlobjinfo处理任意 .cmx 输出 CRC 与导入表 - 用途: 字节码产物/对象文件结构分析（ocamlobjinfo 可读 .cmo/.cmx/字节码可执行文件）
Ghidra / IDA（反编译底座）
- 安装与验证见 [[re-ghidra]] / [[re-ida]]
file / xxd / Python struct（字节级核对）
- 系统自带（
file/xxd）；Python 3 自带struct - 用途: 字节码产物判别（ocamlrun 脚本头）、closure 首字段/block 头字节验证（示例见 [[examples]]）
操作步骤
按顺序执行；逆向着重数据流而非控制流（函数式产物控制流被打散，见坑 4）。每步产物存档（路径 + sha256，见 [[re-triage]]）。
- 运行时识别：
readelf -s sample | grep -iE 'ghc|stg_|RTS|HsMain|_closure|_info' | head # GHC 特征 readelf -s sample | grep -iE 'caml_' | head # OCaml 特征 file sample # 字节码产物判别（脚本头）- GHC：
main（C RTS 入口）+ RTS 运行时符号（stg_*/hs_*）+ 业务符号Main_main_closure/Main_main_info（模块_名字_closure/info形态） - OCaml 原生：
main→caml_main→caml_startup_common→caml_start_program→caml<模块>__entry；caml_startup/caml_startup_pooled是供 C 嵌入调用的等价入口（签名同为 void (char_os **argv)，区别在 pooling 标志与异常行为），勿误当主链；caml_*运行时符号（caml_alloc/caml_apply2/3 等） - 字节码 vs 原生：
caml_start_program仅存在于 native 运行库（4.14.2 libasmrun.a 实测），是 native 特征；字节码判据用caml_interprete（仅 libcamlrun.a 有）；字节码产物判别用file（ocamlrun script executable）/xxd头（#!...ocamlrun\n脚本头 +T/C魔数 + 分节） - 入口链各版本一致：runtime/main.c 定义
main并调用caml_main(argv)（caml_main定义于 startup_byt.c/startup_nat.c；原生链main → caml_main → caml_startup_common → caml_start_program，4.14.2 实测地址见 [[examples]]）；字节码运行库入口为caml_main → caml_startup_aux → caml_interprete - 判别速查：GHC =
stg_*机械符号群 +模块_名_closure/info对；OCaml 原生 =caml_*群 +caml<模块>__<名>_<id>；OCaml 字节码 =#!ocamlrun脚本头
- GHC：
What ships with it
2 files 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.
- 9d ago First seen · 110 lines · 74 tokens per session scan A 51fa5e377527
re-fp-runtime is a skill published in the GitHub repository dslsdzc/rev-skills (50 stars, last pushed 11d ago), licensed Apache-2.0. It adds 74 tokens to every session and 3,103 once invoked, about $0.0004 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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