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/magebyte-zero/magebyte-power/cross-verified-feature-developmentnpx skills add MageByte-Zero/magebyte-power --skill cross-verified-feature-developmentgit clone --depth 1 https://github.com/MageByte-Zero/magebyte-powerWhat 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 | $0.00287 | $0.07899 |
| Opus 5 | $0.00143 | $0.03950 |
| Sonnet 5 | $0.00057 | $0.01580 |
| Haiku 4.5 | $0.00029 | $0.00790 |
Grade A, and why
cross-verified-feature-development 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 2d 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.
This is a copy
100% identical to cross-verified-feature-development — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 491 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cross-Verified Feature Development
A structured workflow for high-stakes backend features. After implementation, it runs 4 independent verification passes to catch bugs that self-review and standard code review miss — particularly concurrency races, idempotency gaps, and cross-service contract breaks.
Prerequisites · 前置条件
本 skill 编排 Superpowers 生态中的子 skill 完成各阶段工作。
Install Superpowers（一次性）：
claude mcp add --transport http superpowers https://superpowers.anthropic.com/mcp
本 skill 依赖的子 skill：
| Phase | Skill | 用途 |
|---|---|---|
| 1 | superpowers:brainstorming |
需求分析 → 结构化 spec |
| 2 | superpowers:writing-plans |
spec → 可执行 task 清单 |
| 3 | superpowers:subagent-driven-development |
每个 task 独立 subagent 实施 |
| 4.1 | superpowers:systematic-debugging |
自查阶段的结构化调试框架 |
| 5 | superpowers:writing-plans + superpowers:subagent-driven-development |
修复迭代 |
没有 Superpowers 也能用（fallback）：
| Phase | Fallback 做法 |
|---|---|
| Phase 1 | 手动撰写 spec 文档，确保包含：问题陈述、技术方案、不变式清单、失败模式分析、风险表格 |
| Phase 2 | 手动拆 task 清单，每个 task 须有文件 + 行号 + 验证命令 |
| Phase 3 | 逐 task 实施，每个 task 完成后做 self-review 再进下一个 |
| Phase 4.1 | 按 references/cross-verification-techniques.md 中的 4.1 checklist 手动自查 |
| Phase 4.2–4.5 | 直接使用 references/cross-verification-techniques.md 里的 agent prompt 模板 dispatch subagent |
Overview · 概览
这是一套多轮交叉验证的严谨特性开发方法论，用于开发关键业务特性时最小化生产事故概率。
Core Insight · 核心洞察
单一视角的 review 有系统性盲点。即使最有经验的开发者也会：
- 被自己的设计思路"带偏"
- 默认某些字段语义是唯一的（实际可能多义）
- 假设"应该幂等"的操作真的幂等（实际不是）
- 看漏并发窗口
- 忘记更新文档导致设计文档与代码失联
独立视角产生的信号彼此独立。用 N 个互不知情的 reviewer 轮询一个特性，发现的 bug 集合接近是并集而不是重复。所以这个工作流的本质是：
设计 → 实施 → 多轮独立交叉验证 → 修复 → 谨慎简化 → 文档同步
Comparison with Standard Workflow · 与普通开发工作流的差异
| 环节 | 普通做法 | 本工作流 |
|---|---|---|
| 需求 | 口头沟通/简单 PRD | brainstorming 形成完整 spec |
| 实施计划 | 开发者脑内规划 | writing-plans 显式化成 task 清单 |
| 实施 | 一人连续写完 | subagent-driven-development，每个 task 独立 review |
| 验证 | 自测 + 一次 code review | 4 轮独立交叉验证（本 skill 的核心） |
| 修复 | 直接改 | 发现问题再走一轮 plan + execute |
| 简化/优化 | 直接删减代码 | 带怀疑的验证，发现陷阱勇敢回滚 |
| 文档 | 实施后遗忘 | 强制回填，记录 evolution log |
What ships with it
4 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.
- 2d ago First seen · 491 lines · 287 tokens per session scan A 2581d86e29fb
cross-verified-feature-development is a skill published in the GitHub repository MageByte-Zero/magebyte-power (0 stars, last pushed 4mo ago), licensed MIT. It adds 287 tokens to every session and 7,899 once invoked, about $0.0014 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to cross-verified-feature-development, differing in 0 lines, and is treated as a copy.
Other skills, from other repositories
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.
brainstorming
You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.
auto-perf-optimize
Run agent-driven VS Code performance or memory investigations. Use when asked to launch Code OSS, automate a VS Code scenario, run the Chat memory smoke runner, capture renderer heap snapshots, take workflow screenshots, compare run summaries, or drive a repeatable scenario before heap-snapshot analysis.
chat-perf
Run chat perf benchmarks and memory leak checks against the local dev build or any published VS Code version. Use when investigating chat rendering regressions, validating perf-sensitive changes to chat UI, or checking for memory leaks in the chat response pipeline.
chat-pet-sprite-creation
Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.
cpu-profile-analysis
Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…