Provide a short workflow for authoring one validated skill

先阅读 packages/intent/src/commands/scaffold.ts 和 domain-discovery SKILL.md，然后将现有的 scaffold 流程与轻量级 discovery 路径进行比较。在一个小型 package 上演示所提议的短路径，并记录其所需的上下文。完成的标准是：短路径和完整库路径都仍然可用，且生成的 skills 通过现有验证，同时保持以 package 源码为依据。

Problem

Scaffold routes maintainers through domain discovery, tree generation, and skill generation with intermediate artifacts and review stops. The existing lightweight branch still requires loading a large discovery file.

Evidence

The first three shipped meta-skills total 90,780 bytes. Domain discovery has a lightweight path, but scaffold still prescribes the three-stage sequence.

Sources: scaffold, domain discovery.

Verified against main at 206e987 (@tanstack/intent 0.3.8), Node v24.12.0 on macOS arm64. Tests used installed dependencies and synthetic local fixtures.

Acceptance criteria

• Define a short path from one maintainer task to one validated SKILL.md.
• Load optional planning schemas, tables, and extensive examples only when needed.
• Keep the full-library authoring path available without forcing its artifacts onto the one-skill path.
• Demonstrate the short path on one small package and record the context it requires.
• Generated skills continue to satisfy existing validation and remain grounded in package source.

Scope and priority

Priority: Medium. Type: feature design.

Follow-up design, independent from repairing meta-skill validation. Do not delete advanced workflows or require a new artifact schema without a concrete need.