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.
npx skills add skillmds/skillmd --skill logic-lensgit clone --depth 1 https://github.com/skillmds/skillmdWrote 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.
[](https://agentmods.dev/skills/skillmds/skillmd/logic-lens)<a href="https://agentmods.dev/skills/skillmds/skillmd/logic-lens"><img src="https://agentmods.dev/badge/skills/skillmds/skillmd/logic-lens/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/skillmds/skillmd/logic-lens"><img src="https://agentmods.dev/badge/skills/skillmds/skillmd/logic-lens.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00037 | $0.01154 |
| Opus 5.5 | $0.00015 | $0.00462 |
| Sonnet 5 | $0.00007 | $0.00231 |
| Haiku 4.5 | $0.00004 | $0.00115 |
Grade A, and why
logic-lens 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Logic Lens
Overview
Logic Lens is a Claude Code skill that performs deep, logic-driven code review using formal reasoning frameworks. Unlike traditional linters that check syntax and style, Logic Lens analyzes your code for logical errors, race conditions, security vulnerabilities, type mismatches, and algorithmic flaws that only appear when you reason through the code's behavior.
Powered by structured AI analysis, Logic Lens applies systematic logical inspection across 9 risk categories: null/undefined handling, type safety, concurrency, resource management, security injection, boundary conditions, algorithm correctness, state management, and API contract violations.
When to Use This Skill
- Use when you want a thorough logic review before merging a PR
- Use when a bug seems hard to find and standard linters aren't helping
- Use when reviewing security-sensitive code paths (auth, payments, file access)
- Use when refactoring complex business logic
- Use when onboarding to a new codebase and need to understand risk areas
How It Works
Logic Lens uses Claude Code's reasoning capabilities to:
- Parse code structure and build a mental model of data flow
- Apply formal logic checks across 9 risk categories
- Trace execution paths for edge cases and boundary conditions
- Identify security anti-patterns (injection, privilege escalation, data leakage)
- Report findings with severity levels and actionable fix suggestions
Installation
# Install via Claude Code plugin marketplace
# Search: "logic-lens" in Claude Code > Extensions
# Or install via NPX (Antigravity)
npx antigravity-awesome-skills --claude
# Then invoke: @logic-lens
Examples
Example 1: Review a Single File
@logic-lens review src/auth/login.ts for security issues
Logic Lens output:
[CRITICAL] SQL Injection risk at line 42: user input concatenated into query string
[HIGH] Missing rate limiting on login attempts
[MEDIUM] Password comparison uses == instead of timing-safe comparison
[LOW] Error messages may leak valid usernames (user enumeration)
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.
- 4d ago First seen · 127 lines · 37 tokens per session scan A fc2846eac595
logic-lens is a skill published in the GitHub repository skillmds/skillmd (1 stars, last pushed yesterday), licensed MIT. It adds 37 tokens to every session and 1,154 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-19.
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