blindspot

blindspot is a skill for Claude Code from donald-ada/workinggenius. It costs 90 tokens per session (511 once invoked), scanned A, original, MIT.

A read-only workflow for finding unknown questions and risks before unfamiliar work begins, and for checking understanding when an important choice is made. It examines the codebase, tests, and history, then reports evidence and asks a quiz.

In plain words
What is it for?
Use it before work in an unfamiliar codebase, when the user cannot evaluate a technical choice, or after changes when understanding needs to be checked.
Why use it?
It exposes assumptions and past trouble spots before they turn into implementation or production problems.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions subagents.

Part of the workinggenius plugin — 22 skills, 3 agents shipped together

Good fit Use it before work in an unfamiliar codebase, when the user cannot…

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/donald-ada/workinggenius/blindspot
Install

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.

Any agent
npx skills add donald-ada/workinggenius --skill blindspot
Clone the repo
git clone --depth 1 https://github.com/donald-ada/workinggenius

Made for: Claude Code.

Or install workinggenius, the plugin that ships this one along with the rest of its 22 skills, 3 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for blindspot

README.md
[![agentmods](https://agentmods.dev/badge/skills/donald-ada/workinggenius/blindspot.svg)](https://agentmods.dev/skills/donald-ada/workinggenius/blindspot)
Your own site
<a href="https://agentmods.dev/skills/donald-ada/workinggenius/blindspot"><img src="https://agentmods.dev/badge/skills/donald-ada/workinggenius/blindspot.svg" alt="Measured on agentmods" height="20"></a>
Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 511 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00090 $0.00511
Opus 5 $0.00045 $0.00255
Sonnet 5 $0.00018 $0.00102
Haiku 4.5 $0.00009 $0.00051

Measured 6d ago against content hash 1e843772da53, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

blindspot 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 6d 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.

skills/blindspot/SKILL.md · 18 lines

What it actually says

Blindspot

The map — your prompt, your plan, your glossary — is not the territory: the codebase, its history, its real constraints. The gap between them is the unknowns, and an unknown left unfound doesn't stay unfound: the diff review finds it, or production does.

The concept: go look, at the three moments the gap is widest.

  • Before unfamiliar work — walk the territory, read-only, as a fresh frontier-tier subagent (hunting unknown unknowns is judgment, not reading — measured twice; and the fresh context means the main session consumes the report instead of re-walking the files). The code, its tests, its history: where it bit last time is the best predictor of where it bites next. Report whatever matters — questions nobody thought to ask, what "good" looks like here, potholes, a sharper ask, and anything that fits no bucket at all; no taxonomy limits what counts as a finding. Every finding carries its evidence, and potholes are found, never manufactured. Check your own recommendations against your own findings before offering them.
  • At a choice the user can't evaluate — "whichever you think" is a judgment gap, not agreement. Teach just enough of the actual difference to hold an opinion, then re-present the choice; if they still can't call it, an honest assumed: beats a hollow confirmation.
  • Before acceptance — nothing verifies the user's map of what got built. Summarize what changed at the behavior level, then quiz the consequences they'll live with. A wrong answer is a finding about the explanation, not the user: repair the map, ask again — so they accept knowing what they accepted.

Standalone or inside a larger flow, the moves are the same. Findings route to whoever is shaping the work: questions into the conversation defining it, terms into the project's glossary where it keeps one, hazards to whoever judges the design.

Changes

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.

  1. 6d ago First seen · 18 lines · 90 tokens per session scan A 1e843772da53

Subscribe to this mod's changes

blindspot is a skill published in the GitHub repository donald-ada/workinggenius (6 stars, last pushed today), licensed MIT. It adds 90 tokens to every session and 511 once invoked, about $0.0005 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 2026-08-31.

Related

Other skills, from other repositories

self-improve

Self-improve this skills repo — surface and (safely) apply quality improvements across four parallel read-only lenses (Clarity, Leanness, Coverage, Ergonomics). Sibling of /self-audit — audit fixes rule violations, improve raises quality where no rule is broken. Local meta-skill, independent of the /task: pipeline.

SpaiR/task-pipeline · 76 tokens

self-audit

Self-audit this skills repo against CLAUDE.md invariants, the artifact contract, and README/CLAUDE.md/docs sync via three parallel read-only subagents. Local meta-skill — independent of the /task: pipeline.

SpaiR/task-pipeline · 52 tokens

grill

Interrogate a plan or decision one question at a time before capture, keeping a decision-plus-rationale ledger, then route to the right capture skill.

SpaiR/task-pipeline · 33 tokens

dw-doctor

Read-only environment diagnostic for a solo-lane repo: whether the tools the hooks and skills assume are installed and whether the repo's guardrails will really fire, each gap reported with a copy-paste fix.

dominikwozniak/dw-solo-skills · 46 tokens

dw-handoff

Compact the live session into .ai/work/ /HANDOFF.md — how far into the current task you are, what is applied but uncommitted, and which dead ends are already ruled out, so the next context window resumes mid-task. Explicit-invoke only.

dominikwozniak/dw-solo-skills · 60 tokens

dw-next

The solo lane's build step and its resume point in one skill: report where the active .ai/work/ /CHANGE.md stands — read from disk, so it survives a /clear — then build every remaining unticked task, one commit each.

dominikwozniak/dw-solo-skills · 56 tokens