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Agent skill

Blind Spot Pass

by sangrokjung in sangrokjung/claude-forge

Use before starting work in a domain you don't know well, to surface the "unknown unknowns" — the things you don't even know to ask about — and learn just enough to prompt and decide well.

MITAuto-check passedMedia & Creative

Install Blind Spot Pass

skills CLI
$ npx skills add sangrokjung/claude-forge --skill blind-spot-pass -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install sangrokjung/claude-forge blind-spot-pass --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/sangrokjung/claude-forge.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/blind-spot-pass .claude/skills/blind-spot-pass && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
blind-spot-pass
GitHub stars
852
Token cost
~2.2k tokens
SKILL.md length
1,156 words
Files
1
Skills in repo
24
Repo updated
First seen
Licence
MIT

At a glance

Use before starting work in a domain you don't know well, to surface the "unknown unknowns" — the things you don't even know to ask about — and learn just enough to prompt and decide well.

  • Works in 4 steps: Calibrate (출발점 파악) → Ground (근거 확보, optional) → Write the Blind Spot Map (핵심 산출물) → …
  • You say Im new to this
  • SKILL.md covers Why it matters (왜 필요한가), The three kinds of unknowns (세…, When it triggers (언제 호출되는가) and When NOT — route elsewhere (경계…, plus 5 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Blind Spot Pass is an agent skill from sangrokjung/claude-forge. Use before starting work in a domain you don't know well, to surface the "unknown unknowns" — the things you don't even know to ask about — and learn just enough to prompt and decide well. Implements the "blind spot pass" pattern from Anthropic's Fable "finding your unknowns" field guide. Triggers when you say "I'm new to this", "I don't know what to ask", "teach me before we start", "blind spot pass", "unknown unknowns", "find my unknowns", or the Korean "내가 뭘 모르는지 알려줘" / "이 분야 처음인데" / "먼저 가르쳐줘" / "블라인드 스팟", or…

Its SKILL.md is about 2.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Media & Creative, covering Tutoring and explanations and Video production. The repository describes itself as: oh-my-zsh for Claude Code — 16 agents, 35 commands, 32 skills, 21 safety hooks in one install. v4.0 adds an adversarial review loop: a second agent that never sees the first… The licence is MIT.

When your agent uses it

  • You say Im new to this
  • I dont know what to ask
  • Teach me before we start
  • Blind spot pass

Example prompts

  • “t know well, to surface the”
  • “— the things you don”
  • “blind spot pass”
  • “/blind-spot-pass”

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Calibrate (출발점 파악)
  2. Ground (근거 확보, optional)
  3. Write the Blind Spot Map (핵심 산출물)
  4. Hand off (핸드오프)

What it can do on your machine

Read from SKILL.md and the folder at commit 34d881d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Blind Spot Pass loads about 2.2k tokens when it runs. Until then it costs about 213 tokens; SKILL.md has 1,156 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~213
When it runs · the whole SKILL.md, loaded when a task matches
~2.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from sangrokjung/claude-forge at commit 34d881d, republished under its MIT licence (© sangrokjung). 1,156 words, ~2,248 tokens.

Download SKILL.mdSave it as .claude/skills/blind-spot-pass/SKILL.md (or your agent's skills folder).
name
blind-spot-pass
description
Use *before* starting work in a domain you don't know well, to surface the "unknown unknowns" — the things you don't even know to ask about — and learn just enough to prompt and decide well. Implements the "blind spot pass" pattern from Anthropic's Fable "finding your unknowns" field guide. Triggers when you say "I'm new to this", "I don't know what to ask", "teach me before we start", "blind spot pass", "unknown unknowns", "find my unknowns", or the Korean "내가 뭘 모르는지 알려줘" / "이 분야 처음인데" / "먼저 가르쳐줘" / "블라인드 스팟", or when you hand off a task while admitting you're a non-expert in that field (color grading, video editing, legal, tax, finance, design, an unfamiliar codebase, etc.). Do NOT use for simple factual questions, domains you already know, or directly-actionable work — answer those directly or route to planner / architect.
version
1.0.0
last_updated
2026-07-08

blind-spot-pass — surface your unknown unknowns before you start

(착수 전 나의 맹점 발굴 + 사전 학습)

Analogy. Before asking for directions in an unfamiliar city, a good local guide first tells you "what to watch out for here, what's worth seeing, the words people use." Only then do you know what to ask. This skill gives you that "local briefing" right before you hand off work in a domain you don't know well.

비유. 낯선 도시에서 길을 묻기 전에, 현지 가이드가 먼저 "이 동네에서 조심할 것, 꼭 봐야 할 것, 여기 사람들이 쓰는 말"을 짚어준다. 그러면 이제 무엇을 물어야 할지 스스로 알게 된다. 이 스킬은 낯선 분야의 작업을 맡기기 직전, 그 "현지 브리핑"을 해주는 역할이다.

Why it matters (왜 필요한가)

Since Fable-class models, the bottleneck on output quality is no longer model capability — it's how well you surface what you don't know. When you hand off work in an unfamiliar domain, you don't even know what to ask (unknown unknowns). Prompt too vaguely and the model silently applies some industry default; prompt too specifically and it follows your wrong turn off a cliff. This skill drains that blind spot before real work starts, because discovering it mid-build is expensive to undo (cost asymmetry / shift-left).

한글: Fable 이후 결과물 품질의 병목은 모델 성능이 아니라 "내가 무엇을 모르는지"를 얼마나 짚어내느냐다. 낯선 분야를 맡길 때는 무엇을 물어야 할지조차 모르는 상태(unknown unknowns)라, 너무 막연하면 모델이 업계 표준을 임의로 갖다 쓰고, 너무 구체적이면 틀린 방향도 고집한다. 이 스킬은 착수 전에 사각지대를 값싸게 드러낸다 — 구현 중에 발견하면 되돌리기 비싸기 때문이다.

The real deliverable is not a "list of questions" — it's a method that surfaces blind spots and teaches the minimum. If it degrades into "let me ask you some questions", it just duplicates planner. Don't let it. (진짜 산출물은 질문 목록이 아니라 사각지대를 드러내고 최소한만 가르치는 방법이다.)

The three kinds of unknowns (세 가지 불확실성)

KindWhat it isHandled by
Known knownswhat you wrote in the prompt (프롬프트에 적은 것)just instruct
Known unknownsundecided, but you know you don't know (모른다는 건 아는 미결정)planner interview / /plan
Unknown knownsso obvious you didn't say it — tacit taste, "I know it when I see it" (너무 당연해 안 적은 암묵지)/explore references · lightweight prototype
Unknown unknownsnever even considered — an unfamiliar domain (아예 고려조차 못 한 것)this skill

See rules/unknowns-lens.md for the full 4-quadrant lens and routing. (짝 룰: 4사분면 렌즈 + 라우팅.)

When it triggers (언제 호출되는가)

  • "blind spot pass", "unknown unknowns", "find my unknowns"
  • "I don't know what to ask", "I'm new to this field", "teach me before we start (so I can prompt well)"
  • 한글: "내가 뭘 모르는지 알려줘", "이 분야 처음인데 뭘 물어야 할지 모르겠어", "먼저 가르쳐줘", "블라인드 스팟"
  • When you hand off unfamiliar-domain work while admitting you're a non-expert (e.g. "I don't really know color grading, but fix the tone of this video").

When NOT — route elsewhere (경계 — 오발동 방지)

SituationRight path
Simple factual question (단순 사실 질문)Answer directly
A domain you already know (이미 아는 분야)Start the work
"Which approach is better?" divergence (발산·옵션 비교)brainstorm (/explore, or superpowers:brainstorming if installed)
Requirements clear, need an implementation plan (구현 계획)planner / /plan
System design / architecture trade-offs (아키텍처 판단)architect
Building a curriculum to teach others (남 가르칠 교안)out of scope

Core test: if it's filling your own knowledge blind spot before you prompt, use this skill; otherwise route up. No unfamiliar-domain signal → don't fire. (핵심 구분: 본인의 지식 사각지대를 메우는 사전 학습이면 이 스킬, 그 외는 위로 라우팅.)

Workflow (워크플로우)

Phase 1 — Calibrate (출발점 파악)

What to teach depends on what you already know. Use AskUserQuestion to check only what's needed:

  • How much do you know here? (first time / picked up bits / know the concepts)
  • What do you ultimately want out of this? (one line)
  • (optional) Any reference or "something like this" example?

Fewer questions if the answers are already clear. The goal is calibrating the teaching level, not interrogation. (심문이 아니라 가르칠 눈높이 맞추기.)

Phase 2 — Ground (근거 확보, optional)

If the field is technical or needs current facts, delegate to /explore (for the local codebase) or a web/research pass to lock down correct vocabulary, standards, and pitfalls. Skip for common-knowledge domains.

Show full SKILL.md (459 more words)Show less
Phase 3 — Write the Blind Spot Map (핵심 산출물)

Produce the map in the template below. Apply the teaching-style rules — analogy first, conclusion first, gloss hard terms on first use.

Phase 4 — Hand off (핸드오프)
  • Show an improved prompt → "now instruct it like this" and start the real work.
  • More divergence → brainstorm; implementation plan → planner / /plan; code references → /explore; parallel work → /orchestrate.
  • This skill teaches and hands off — it is not a gate. If the user says "skip it, just do it", proceed immediately. (가르치고 넘겨줄 뿐, 승인 관문이 아니다. "바로 해"에 즉시 양보.)
Show, don't tell — for unknown knowns (보고 반응 — 암묵지 끌어내기)

Some standards are tacit ("I know it when I see it"): document tone, screen layout, data shape. Don't ask about these in words — make a cheap throwaway artifact and let the user react: a one-page outline, a sample line of output, mock data, a straw-man in pseudocode, or (for UI) a quick mockup. Provide real source/reference instead of a description. Keep it a throwaway — never let this grow into starting the actual build (that would betray shift-left). (말론 애매한 취향은 버리는 견본을 만들어 "보고 반응"으로 끌어낸다.)

Auto-surfacing (선택 — 룰 기반 자동)

The paired always-on rule rules/unknowns-lens.md names this skill as the first move for unfamiliar-domain work, so it can surface automatically without a manual call. It's a nudge, not a hard gate. (짝 룰이 낯선 도메인 작업의 첫 수로 이 스킬을 지정 — 강제가 아닌 권장.)

Output — Blind Spot Map template (산출물 형식)

# [Domain] Blind Spot Map  ([분야] 블라인드 스팟 맵)

## Bottom line first — what you must know for this task
   (결론 먼저 — 이 작업에서 꼭 아셔야 할 것. 한두 문장. 비유 하나면 더 좋음.)

## Minimum vocabulary — only what you need  (이 분야 최소 어휘)
| Term | Plain meaning (쉬운 풀이) |
|------|--------------------------|

## The 3–5 decisions that actually matter   ← the heart of the blind spot
   (진짜 갈리는 결정 3~5개 — 여기가 사각지대의 핵심)
1. [Decision] — option A vs B, what's good/bad about each (trade-off)
   → In your situation, usually: ...

## Common traps / how this goes wrong  (흔한 함정 / 이렇게 하면 망한다)
- ...

## What "good" looks like  ("좋은 결과"는 어떻게 생겼나)
- (Criteria / examples, so you can judge the result yourself.)

## → Now prompt it like this  (→ 이제 이렇게 프롬프트하시면 됩니다)
"(a ready-to-use, improved instruction that reflects the blind spots)"

Three decisions or fewer → only that many. Don't write a textbook — teach only enough to prompt and judge. (교과서를 쓰지 말 것 — 프롬프트하고 판단할 만큼만.)

Teaching style (CRITICAL)

  • Analogy first: a sentence or two of analogy before the technical explanation. (비유 먼저)
  • Conclusion first: the first line of each section is the point. (결론 먼저)
  • Gloss hard terms on first use: "color grading (adjusting a video's color/contrast toward an intended mood)". Assume a non-expert reader. (어려운 용어는 첫 등장 시 괄호 풀이 — 독자는 비전문가다.)
  • Don't stack dense tables/acronyms. Understanding over density.

Never do (절대 하지 말 것)

  • ❌ Degrade into a generic "let me ask you questions" wrapper — that duplicates planner. This skill's whole justification is blind-spot surfacing + right-level teaching.
  • ❌ Fire on a domain the user already knows — unfamiliar-domain signal only.
  • ❌ Turn teaching into a gate — it's pre-learning, not an approval checkpoint. Yield to "just do it".
  • ❌ Textbook-length essays — only the minimum needed to prompt and judge.
  • rules/unknowns-lens.md — the 4-quadrant unknowns lens + cost-asymmetry rule (names this skill as the first move for unfamiliar domains).
  • rules/interaction.md — extends "state your assumptions before coding" from the model's assumptions to your own knowledge.
  • planner · architect · /explore · /plan · /orchestrate — Phase 4 routing targets.
  • Source: Anthropic — "A field guide to Claude Fable 5: Finding your unknowns" (Thariq Shihipar, 2026).

© sangrokjung, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/blind-spot-pass of sangrokjung/claude-forge.

Open the folder on GitHubat commit 34d881d

Compare with similar skills

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Categories

Questions about Blind Spot Pass

What does Blind Spot Pass do?

Use before starting work in a domain you don't know well, to surface the "unknown unknowns" — the things you don't even know to ask about — and learn just enough to prompt and decide well. Blind Spot Pass is an agent skill from sangrokjung/claude-forge. Use before starting work in a domain you don't know well, to surface the "unknown unknowns" — the things you don't even know to ask about — and learn just enough to prompt and decide well.

When should I use Blind Spot Pass?

Blind Spot Pass fits situations like: you say Im new to this; I dont know what to ask; teach me before we start; blind spot pass.

How do I install Blind Spot Pass in Claude Code?

Run `npx skills add sangrokjung/claude-forge --skill blind-spot-pass -a claude-code`. Or copy the skill folder (skills/blind-spot-pass in sangrokjung/claude-forge) into .claude/skills/blind-spot-pass in your project. Claude Code loads it when a task matches its description.

How do I install Blind Spot Pass in Codex?

Run `npx skills add sangrokjung/claude-forge --skill blind-spot-pass -a codex`. Or copy the skill folder (skills/blind-spot-pass in sangrokjung/claude-forge) into .agents/skills/blind-spot-pass in your project. Codex loads it when a task matches its description.

Can I use Blind Spot Pass in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sangrokjung/claude-forge --skill blind-spot-pass -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/blind-spot-pass, .gemini/skills/blind-spot-pass, .github/skills/blind-spot-pass and .opencode/skills/blind-spot-pass in your project.

What does Blind Spot Pass need to run?

SKILL.md names no scripts, command-line tools or credentials: Blind Spot Pass is instructions for the agent only.

Does Blind Spot Pass access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Blind Spot Pass safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Blind Spot Pass use?

Blind Spot Pass is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Blind Spot Pass use?

About 2.2k tokens (SKILL.md is roughly 9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Blind Spot Pass?

Skills that share tags, products or a category with Blind Spot Pass: Manim Animation Maker (mingchen666/Reviva, 244 stars), Math Tutorial Video Planner (agentscope-ai/QwenPaw, 36k stars), HyperFrames Animation (heygen-com/hyperframes, 60k stars) and Stitch to Remotion Walkthrough Videos (google-labs-code/stitch-skills, 8.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Blind Spot Pass?

sangrokjung (a GitHub user) maintains it in sangrokjung/claude-forge, which has 852 GitHub stars. The repository holds 24 skills in this directory. The repository was last updated on September 3, 2026.

Source: sangrokjung/claude-forge on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.