Scan Field Agent Skill

Scans the market and ecosystem for prior art before building tools and maps originality and upgrade paths after completion.

Context cost
1.6k tokensestimated from the bundle, loaded when it triggers
Bundle
1 file · 6.6 kBtext throughout, nothing executable
Licence
not declarednone named by its author
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Use at either end of building something: BEFORE creating or rewriting a tool/plugin/product — is there prior art, can I just use it, what should I borrow; and AFTER it basically works — originality comparison plus upgrade directions (broadly better: ideas, architecture, niche, not just runtime perf). 中文触发:开工前搜市面同款、别盲目造轮子、重写前先看过同款、有没有现成的;完工后扫同款、原创度对比、升级方向。由用户显式请求或 vibe-flow 路由触发。只产结论/文档,不改项目代码。Stack-independent.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

productivity

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md6.6 kB · preview
--- name: scan-field ---
6# scan-field:对外扫同款(开工前借点子 / 完工后找升级方向)
7
8## 总纲
9
10> 真正的浪费只有一种:**不知道同款存在**——既没借到好点子又白花时间。规则不是「禁止造轮子」,是「**动手前先看过**」。
11
12个人工具造轮子不天然是罪:握着源、贴合工作流、能自己改都是收益。所以本 skill 从不劝退,只负责让你**在知情的前提下**决定。
13
14**一进门先分岔**:用户在**开口**(要新建或重写一个东西)还是**回头**(东西做到能用了)?两头共用同一套搜索机制与原创度判据,**产物厚度差一档**:开口那头几句话,回头那头一份文档。
15
16**为什么有两头**(cut-scope 只有一头):cut-scope 与本 skill 是「对内剪枝 / 对外比同款」一对,但时间性不同——**设计膨胀只会事后发生**,而**「不知道同款存在」的代价在开工前最大**。故 cut-scope 只有事后一头,scan-field 两头都有。
17
18## 缩放闸(先过这道,否则违反「小事要省」)
19
20**开口那头只在以下情形跑:**
21
22- 要新建一个**能拿出去**的东西:插件 / 工具包 / 产品 / 会长期活的工具。
23- 打算**重写或替换**一个已有的东西(自己的或别人的)。
24
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md295 words
Files1
Licencenot declared
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈110
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
1,540
on trigger
The instruction body, read only when the skill fires.
0.83%
of a 200k window
Ten skills this size would take about 8% of the window before you open a file.
050k100k150k200k context window

1.6k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Middling. Fine to keep on in a project where you use it weekly, worth unloading in one where you never do.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

1 file, 6.6 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md6.6 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 1 file you can review in full before installing.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Scan Field · 1.6k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/scan-field/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/scan-field" ] && { [ ! -e .claude/skills/scan-field ] || { mv .claude/skills/scan-field "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/scan-field" .claude/skills/ && echo "Installed .claude/skills/scan-field"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add patrick1099/scan-field

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/scan-field/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/scan-field/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/scan-field" ] && { [ ! -e ~/.claude/skills/scan-field ] || { mv ~/.claude/skills/scan-field "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/scan-field" ~/.claude/skills/ && echo "Installed ~/.claude/skills/scan-field" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/scan-field/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencepatrick1099/scan-field

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

Reviews

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