code-analysis

code-analysis is a skill for Claude Code, Codex from syhya/mlsys26-flashinfer-contest. It costs 24 tokens per session (3,708 once invoked), scanned A, original, Apache-2.0.

A code-review and debugging guide for finding bugs, security weaknesses, performance problems, and maintainability issues. It also suggests fixes and refactoring options.

In plain words
What is it for?
Use it to review existing code, investigate errors, check for vulnerabilities, improve performance, or plan refactoring.
Why use it?
It provides a structured way to inspect code for failures and risks that may be missed during normal development.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions Codex.

Good fit Use it to review existing code, investigate errors, check for vulnerabilities, improve performance, or plan refactoring.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/syhya/mlsys26-flashinfer-contest/code-analysis
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 syhya/mlsys26-flashinfer-contest --skill code-analysis
Clone the repo
git clone --depth 1 https://github.com/syhya/mlsys26-flashinfer-contest

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 code-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/syhya/mlsys26-flashinfer-contest/code-analysis/github.svg)](https://agentmods.dev/skills/syhya/mlsys26-flashinfer-contest/code-analysis)
Your own site
<a href="https://agentmods.dev/skills/syhya/mlsys26-flashinfer-contest/code-analysis"><img src="https://agentmods.dev/badge/skills/syhya/mlsys26-flashinfer-contest/code-analysis/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.

agentmods 80×15 button for code-analysis

Your own site · 80×15
<a href="https://agentmods.dev/skills/syhya/mlsys26-flashinfer-contest/code-analysis"><img src="https://agentmods.dev/badge/skills/syhya/mlsys26-flashinfer-contest/code-analysis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,708 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00024 $0.03708
Opus 5.5 $0.00010 $0.01483
Sonnet 5.5 $0.00005 $0.00742
Haiku 4.5 $0.00002 $0.00371

Measured 1mo ago against content hash 93359b13bb54, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

code-analysis scanned grade A with 1 finding 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 1mo ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/performance_profiler.py, scripts/security_scanner.py, scripts/static_analyzer.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

result = subprocess.run([
full-agent/dsa/agent/.agents/skills/code-analysis/SKILL.md · 636 lines

How it starts

The opening of the file, as written. The whole thing — 636 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Analysis & Bug Hunting Skill

This skill provides systematic approaches for analyzing code, identifying issues, and proposing fixes.

Purpose

Use this skill when your task involves:

  • Finding bugs in existing code
  • Code quality review
  • Performance optimization suggestions
  • Security vulnerability detection
  • Refactoring recommendations
  • Best practices enforcement

Key Capabilities

1. Bug Detection

  • Logic errors (off-by-one, null checks, etc.)
  • Type mismatches and conversion issues
  • Resource leaks (file handles, connections)
  • Concurrency issues (race conditions, deadlocks)
  • Exception handling gaps
  • Edge case failures

2. Code Quality Issues

  • Code duplication
  • Overly complex functions
  • Poor naming conventions
  • Missing documentation
  • Inconsistent formatting
  • Dead code

3. Performance Problems

  • Inefficient algorithms (O(n²) where O(n) possible)
  • Unnecessary loops or operations
  • Memory leaks
  • Excessive I/O operations
  • Missing caching opportunities
  • Database query inefficiencies

4. Security Vulnerabilities

  • SQL injection risks
  • XSS vulnerabilities
  • Insecure authentication
  • Exposed secrets/credentials
  • Insufficient input validation
  • Path traversal risks

Bug Hunting Workflow

Phase 1: Code Understanding

1. Read all files to understand codebase structure
2. Identify entry points and main workflows
3. Map dependencies between components
4. Note external dependencies and APIs used

Phase 2: Issue Detection

1. Static analysis (read code carefully)
2. Look for common bug patterns
3. Check error handling coverage
4. Validate input/output handling
5. Review edge cases

Phase 3: Issue Documentation

For each issue found, document:
- Location: file:line_number
- Severity: Critical / High / Medium / Low
- Category: Bug / Performance / Security / Quality
- Description: What's wrong
- Impact: What could go wrong
- Recommendation: How to fix it
- Code example: Before and after

Phase 4: Fix Implementation

1. Prioritize by severity
2. Implement fixes one at a time
3. Preserve existing functionality
4. Add comments explaining changes
5. Ensure backward compatibility (if needed)

Read the full file on GitHub · 636 lines

Files

What ships with it

7 files 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. 1mo ago First seen · 636 lines · 24 tokens per session scan A 93359b13bb54

Subscribe to this mod's changes

code-analysis is a skill published in the GitHub repository syhya/mlsys26-flashinfer-contest (23 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 24 tokens to every session and 3,708 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories

network-exam-practice

Use this skill whenever the user wants computer network exam preparation, final review, 408-style networking practice, chapter quizzes, subnetting calculations, routing table problems, TCP sequence/ACK questions, protocol analysis, answer grading, or mistake diagnosis.

mingchen666/Reviva · 54 tokens

oracle

Use the @steipete/oracle CLI to bundle a prompt plus the right files and get a second-model review (API or browser) for debugging, refactors, design checks, or cross-validation.

davidtoby/agent-skills · 43 tokens

doubt-driven-development

Subjects every non-trivial decision to a fresh-context adversarial review before it stands. Use when you want every assumption cross-examined before proceeding, when stress-testing a plan for hidden failure modes, when correctness matters more than speed, when working in unfamiliar code, when stakes are high…

addyosmani/agent-skills · 96 tokens

check

Reviews diffs, PRs, release readiness, and publishing follow-through. Use when asked to review, triage issues or PRs, or ship. Not for debugging root causes or prose.

tw93/Waza · 41 tokens

ego-lite-simplify

Find and implement evidence-backed simplifications in the ego-lite repository. Use when reviewing the codebase for dead code, duplicated state or APIs, speculative abstractions, unnecessary compatibility layers, hand-written infrastructure, excessive tests or documentation, or when the user asks to reduce code size or…

citrolabs/ego-lite · 68 tokens

safe-refactoring

Execute behavior-preserving or intentionally scoped refactors safely. Use this for multi-file renames, component/service extraction, state-management changes, API migrations, concurrency refactors, or any request where unrelated user work and subtle contracts must be preserved.

ageerle/ruoyi-ai · 52 tokens