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/wallkop/opc-develop/designnpx skills add wallkop/opc-develop --skill designgit clone --depth 1 https://github.com/wallkop/opc-developWhat 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 | $0.00115 | $0.00800 |
| Opus 5 | $0.00057 | $0.00400 |
| Sonnet 5 | $0.00023 | $0.00160 |
| Haiku 4.5 | $0.00012 | $0.00080 |
Grade A, and why
design 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.
What it actually says
design
PRD / 技术设计 / E2E TestCase 三件套本是同一批决策的三种视角——本环节一次定案为产品定义。
格式与粒度以 docs/harness.zh-CN.md 第 7.5 节为权威，判据只有一条：只写决策，不写实现——
模型可以自己安全决定或推翻的内容，不进产品定义。
前置
加载 ${CLAUDE_PLUGIN_ROOT}/shared/core-contract.md；已有 brief.md（及 Demo 决策清单，若做过 Demo）。
拷问
以 grilling / grill-me 的方式，按三个维度批量出题，每轮 5-10 个问题，每题附推荐答案与理由：
- 产品维度 → PD：不可退让的底线是什么？失败 / 空态 / 极端场景下产品该怎么表现？ Demo 确认的决策逐条落位，逐条编号。
- 技术维度 → TD：哪些选择难以回头（供应商、协议、数据所有权、领域边界）？ 理由与被排除的备选是什么？可逆的实现细节一律不收录，并写"不收录"反例示范粒度。
- 测试维度 → AC：从真实用户入口、以黑盒定义"什么算对、什么算不合格" （must / must_not / 超时 / 必需证据），每条 AC 回指一条 PD； 必须恰好指定一条 Core-Case（F0 正向主链路）并声明其 test / production 冒烟投影。
架构位置图（TD 固定首条）
从项目全景架构图裁剪本需求视角的位置图：只许引用全景已有节点名，标色画出触及的层次、 模块与依赖方向。它是升级规则的检测器：
- 只用到现有节点与现有边 ⇒ 架构未动，画完即决策背景；
- 出现新节点 / 新依赖边 / 跨领域调用 ⇒ 本需求动了架构，必须同步产出或修订 ADR 与全景标色快照（宏观架构图），产品定义内只留决策一句话加链接。
项目尚无全景图时，先补立项决策（走 harness-init / harness-retrofit）；
不允许架构语义只存在于某个 feature 的 definition.md 里。
收口
definition.md（+ 必要的 ADR / 全景快照）交人类 review：确认 → 状态置为已定案，进入 build；
否则按反馈修改再审。定案后每一条都不许模型自行推翻。
产出
已定案的 definition.md（含架构位置图、Core-Case 与冒烟投影声明）。下一步：build。
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 · 49 lines · 115 tokens per session scan A 13a1be81e9ee
design is a skill published in the GitHub repository wallkop/opc-develop (11 stars, last pushed 1mo ago), licensed MIT. It adds 115 tokens to every session and 800 once invoked, about $0.0006 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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