ai-code-blindspots

ai-code-blindspots is a skill for Claude Code, Codex from event4u-app/agent-config. It costs 49 tokens per session (2,576 once invoked), scanned B, original, MIT.

A pre-release checklist for code that looks for important safeguards an AI may have missed, such as access checks, input validation, transactions, encryption, and error handling.

In plain words
What is it for?
Use it when reviewing or completing endpoints, database queries, migrations, user-interface rendering, file or network operations, infrastructure changes, dependencies, or tests.
Why use it?
A single code request often hides requirements that are not visible in the edited file. The checklist helps catch these omissions before the change is treated as finished.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/event4u-app/agent-config/ai-code-blindspots
Any agent
npx skills add event4u-app/agent-config --skill ai-code-blindspots
Clone the repo
git clone --depth 1 https://github.com/event4u-app/agent-config

Made for: Claude Code, Codex.

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 ai-code-blindspots

README.md
[![agentmods](https://agentmods.dev/badge/skills/event4u-app/agent-config/ai-code-blindspots.svg)](https://agentmods.dev/skills/event4u-app/agent-config/ai-code-blindspots)
Your own site
<a href="https://agentmods.dev/skills/event4u-app/agent-config/ai-code-blindspots"><img src="https://agentmods.dev/badge/skills/event4u-app/agent-config/ai-code-blindspots.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,576 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
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 $0.00049 $0.02576
Opus 5 $0.00024 $0.01288
Sonnet 5 $0.00010 $0.00515
Haiku 4.5 $0.00005 $0.00258

Measured 5d ago against content hash 3b6fa5d53bfd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

ai-code-blindspots scanned grade B with 2 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 5d 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.

Reads MCP configurationmediumAgent snooping

mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.

| **Secrets/credentials** | never a literal in source; env / secret-manager reference; password columns use bcrypt/argon2, never MD5/SHA; **agent/MCP config too** — no raw key in `.mcp.json` / agent-config / CI YAML / a

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

rg -n '"Action"\s*:\s*"\*"|"Resource"\s*:\s*"\*"|0\.0\.0\.0/0|InsecureSkipVerify|verify=false|curl.*\| *bash' .
src/skills/ai-code-blindspots/SKILL.md · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ai-code-blindspots

AI writes the code the prompt literally asked for and stops. The controls a senior adds from unstated context — authorization, tenant scope, validation, transactions, encryption, rate limiting, output encoding, error handling, edge cases, package existence — are invisible to a single-file prompt, so they are the first thing dropped. They are also the classes pattern-linters miss. This skill is the pre-ship checklist: for the surface you just wrote, assert the matching control is present, run the backstop grep, and route to the deep skill when it needs more than a check.

This is a routing + verification layer — it does not re-teach what the deep skills own. It is the "did I supply the invisible controls?" gate that senior-engineering-discipline points at.

When to use

  • You have written (or are about to finish) an endpoint, query, migration, UI render, file/network op, infra resource, dependency change, or test — before you call it done.
  • Reviewing an AI-authored diff and asking "what did it silently omit?".
  • The senior-engineering-discipline rule fired and routed you here.

Do NOT use when: the change is prose/docs/config-only, or a one-line rename — there is no code surface to check.

The Iron Law

FOR EVERY SURFACE YOU TOUCHED, NAME THE INVISIBLE CONTROL AND CONFIRM IT IS PRESENT.
"NOT MENTIONED IN THE PROMPT" IS EXACTLY WHY IT IS MISSING — CHECK IT ANYWAY.
A CONTROL DEFINED BUT NOT WIRED IS ABSENT. A grep IS CHEAPER THAN A BREACH.

Procedure

  1. Inspect the change and list the surfaces it touched (endpoint, query, migration, render, file/fetch, infra, dependency, test) — analyze what you actually wrote before checking it.
  2. For each surface, take its row below: assert every listed invisible control is present (with file:line), and run the matching backstop grep.
  3. For anything a grep flags or a check can't confirm, open the routed deep skill.
  4. Emit the per-surface confirmation (Output format); surface any unresolved gap to the user — never silently omit.

Read the full file on GitHub · 114 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 5d ago First seen · 114 lines · 49 tokens per session scan B 3b6fa5d53bfd

Subscribe to this mod's changes

ai-code-blindspots is a skill published in the GitHub repository event4u-app/agent-config (10 stars, last pushed today), licensed MIT. It adds 49 tokens to every session and 2,576 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 2 findings (reads mcp configuration, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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