mcpp: Skill for Claude Code

.agents/skills/mcpp-release/SKILL.md

mcpp-release is a skill for Claude Code, Codex from mcpp-community/mcpp. It costs 46 tokens per session (5,668 once invoked), scanned A, original, Apache-2.0.

A release checklist for mcpp, including version changes, a Git tag, release CI, and monitoring of platform builds. mcpp is the project being released, and the checklist covers its date-based version format and bootstrap version pin.

In plain words
What is it for?
Use it to prepare and monitor a complete mcpp release, including the version bump, tag, release pipeline, and final bootstrap update.
Why use it?
It keeps the different version locations in sync and prevents CI from trying to install a version that has not been published yet.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is mcpp-community/mcpp's own configuration. It tells Claude Code and Codex how to work on mcpp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcpp configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is bash .github/tools/check_version_pins.sh.

Reuse

Borrowing it

Nothing to install: this file belongs to mcpp-community/mcpp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/mcpp-community/mcpp/main/.agents/skills/mcpp-release/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/mcpp-community/mcpp

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for mcpp-release

README.md
[![agentmods](https://agentmods.dev/badge/skills/mcpp-community/mcpp/mcpp-release/github.svg)](https://agentmods.dev/skills/mcpp-community/mcpp/mcpp-release)
Your own site
<a href="https://agentmods.dev/skills/mcpp-community/mcpp/mcpp-release"><img src="https://agentmods.dev/badge/skills/mcpp-community/mcpp/mcpp-release/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.

agentmods 80×15 button for mcpp-release

Your own site · 80×15
<a href="https://agentmods.dev/skills/mcpp-community/mcpp/mcpp-release"><img src="https://agentmods.dev/badge/skills/mcpp-community/mcpp/mcpp-release.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,668 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

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 →

  • high Tool Misuse · line 322
    Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).
    Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
  • high Tool Misuse · line 322
    Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).
    Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.05668
Opus 5.5 $0.00018 $0.02267
Sonnet 5.5 $0.00009 $0.01134
Haiku 4.5 $0.00005 $0.00567

Measured 1mo ago against content hash af0e1acfa0a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcpp-release scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://raw.githubusercontent.com/openxlings/xim-pkgindex/main/pkgs/m/mcpp.lua \
.agents/skills/mcpp-release/SKILL.md · 359 lines

How it starts

The opening of the file, as written. The whole thing — 359 lines — stays where its author put it; the contents beside it link to each section on GitHub.

mcpp 版本发布流程

版本号规范

格式:YYYY.M.D.N(日期版本,月/日不补零),例如 2026.7.27.1。 自 2026.7.27.1 起启用,此前为 0.0.x。与 xlings 生态一致(xlings 于同日从 0.4.70 迁入)。

第 4 段的语义:

.0 保留给正式版本 / 稳定版本。日常迭代默认从 .1 开始。

即一天内可发 .1、.2、.3 …… 若干次常规版本;.0 只在该版本被认定为正式 release 或稳定版时使用。

跨方案的序是单调的:0.0.109 < 2026.7.27.1,第一段从 0 变 2026,不存在回退。

比较逻辑见 src/version_req.cppm。它支持 4 段;改动那里时务必保证 str() 精确回写, src/pm/resolver.cppm 用它重建依赖版本串,会流向 lock 文件与 xlings wire 地址。 尤其 .0 结尾的版本不能塌成三段。

Overview

mcpp 有 三个持久化版本位置,以及 ci-fresh-install 的一个运行时推导值。它们分属 两组,在不同时间更新;把"正在构建的版本"与 bootstrap pin 一起前移会让 CI 尝试安装 尚未发布的 mcpp。

第一组:正在构建的版本(发布时改,走 bump PR)

  1. mcpp.toml → [package].version — 构建系统读取的项目版本,release.yml 由它推导 tag
  2. src/version.cppm → MCPP_VERSION — 编译期硬编码常量(--version 输出、BMI 指纹、E0006 索引底线比较)

这两处必须在同一个 commit 里一起改:tests/e2e/01_help_and_version.sh 交叉比对 mcpp.toml 与 mcpp --version,只改一处 CI 立刻红。

第二组:bootstrap pin —— CI 用哪个 mcpp 来自举(发布并进索引之后才可改)

  1. .xlings.json → workspace.mcpp — CI bootstrap 装哪个 mcpp

.xlings.json 必须指向一个已经发布、镜像并进入索引的版本。因此它在 bump PR 中 保持已有的可安装版本,直到发布收尾时才可前移。

ci-fresh-install.yml 的 MCPP_PIN 不是持久化 pin:wait-index 从最新 GitHub Release 推导一次,所有安装 job 消费同一个输出。绝不能手工编辑或恢复字面量 MCPP_PIN,否则 index guard 和实际安装版本会再次漂移。

.github/tools/check_version_pins.sh 校验版本关系和 xlings pin:

bash .github/tools/check_version_pins.sh

必须用 bash 跑,不能用 sh。 脚本用了进程替换(done < <(...)),POSIX sh/dash 解析不了,用 sh 调用会在第 95 行附近报 Syntax error: redirection unexpected。那是调用它的 shell 的问题,不是脚本的缺陷 —— 它的 shebang 是 #!/usr/bin/env bash,CI 也是用 bash 调的。别据此把这条 guard 当成坏的而跳过: 它是唯一能机器化捕捉 pin 漂移的东西。

也不要通过修改文档或 workflow 绕开动态 MCPP_PIN 设计。src/platform/xlings/xlings.cppm 的 pinned::kXlingsVersion 仍是 xlings 版本的唯一真源。

发布步骤

1. 确认 main 分支状态

git checkout main && git pull origin main
# 确认 CI 全部通过
gh run list --branch main --limit 3

以分支保护和 gh pr checks <pr-number> 显示的 actual required checks 为准。 在 main 上监控当前运行时,检查 ci 这一个工作流的运行(它包含各平台、e2e 分片、 交叉构建与 e2e-coverage);known-red 的腿(名字里带 issue 号)允许失败。跳过或 非 required 的 workflow 不是合入 gate。不要在 ci 红的时候发版。

Read the full file on GitHub · 359 lines

Changes

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.

  1. 1mo ago Changed af0e1acfa0a9
  2. 1mo ago Changed 2e45c4bbc13f
  3. 2mo ago Changed · +31 lines d17992cdd791
  4. 2mo ago First seen · 328 lines · 46 tokens per session scan A a5e80182abfe

Subscribe to this mod's changes

mcpp-release is a skill published in the GitHub repository mcpp-community/mcpp (196 stars, last pushed yesterday), licensed Apache-2.0. It adds 46 tokens to every session and 5,668 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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