codebase

codebase is a skill for Claude Code from ShulkwiSEC/bb-huge. It costs 208 tokens per session (8,071 once invoked), scanned A, original, MIT.

A source-code security review based on the OWASP Application Security Verification Standard, a checklist for secure web application design and implementation.

In plain words
What is it for?
Identifying vulnerabilities in application source code, mapping endpoints, and preparing findings for threat modeling and remediation.
Why use it?
It turns a codebase into a map of its technologies, routes, and possible attack surfaces so later security work can focus on real evidence.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: positional $N argument; mentions Claude Code; mentions OpenCode.

Good fit Identifying vulnerabilities in application source code, mapping endpoints, and preparing findings for threat modeling and remediation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/shulkwisec/bb-huge/codebase
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 ShulkwiSEC/bb-huge --skill codebase
Clone the repo
git clone --depth 1 https://github.com/ShulkwiSEC/bb-huge

Made for: Claude Code.

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 codebase

README.md
[![agentmods](https://agentmods.dev/badge/skills/shulkwisec/bb-huge/codebase/github.svg)](https://agentmods.dev/skills/shulkwisec/bb-huge/codebase)
Your own site
<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/codebase"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/codebase/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 codebase

Your own site · 80×15
<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/codebase"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/codebase.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 208 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,071 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 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 $0.00208 $0.08071
Opus 5 $0.00104 $0.04036
Sonnet 5 $0.00042 $0.01614
Haiku 4.5 $0.00021 $0.00807

Measured 7d ago against content hash 2a1e5e8676bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

codebase scanned grade A 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 7d 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.

Unrestricted tool accesslowExcessive agency

A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.

- **Over-permissioned operations**: can the tool delete data, modify configs, access other users' resources, execute arbitrary code?

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Runs shell commandslowCapability

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

- `eval()`, `exec()`, `subprocess`, `os.system()`, `child_process.exec()` — code execution
skills/curated/codebase/SKILL.md · 581 lines

How it starts

The opening of the file, as written. The whole thing — 581 lines — stays where its author put it; the contents beside it link to each section on GitHub.

White-Box Codebase Security Review

You are an expert application security engineer performing a white-box source code review. Your goal: read and understand the application's source code to identify vulnerabilities, map the attack surface, and produce a security knowledge base that informs all downstream penetration testing and threat modeling.

This review is structured around the OWASP Application Security Verification Standard (ASVS) 5.0 — 427 verification requirements across 16 chapters. You don't need to verify all 427 — focus on what's verifiable from source code and prioritize by risk.

Request: $ARGUMENTS


CHAIN COMMITMENTS — DECLARE BEFORE STARTING

Read this before executing any workflow phase. Commit to MANDATORY chains before your first tool call.

Trigger Chain Mandatory? Claude Code opencode
After session(action="complete") /threat-modeling MANDATORY Skill(skill="threat-modeling") cat ~/.config/opencode/commands/threat-modeling.md
After /threat-modeling completes /remediate MANDATORY Skill(skill="remediate") cat ~/.config/opencode/commands/remediate.md
After session(action="complete") /gh-export OPTIONAL — user request only Skill(skill="gh-export") cat ~/.config/opencode/commands/gh-export.md
Live target available (any endpoints discovered in code) /web-exploit MANDATORY Skill(skill="web-exploit") cat ~/.config/opencode/commands/web-exploit.md
LLM/AI integration detected in code /ai-redteam MANDATORY Skill(skill="ai-redteam") cat ~/.config/opencode/commands/ai-redteam.md
API routes/controllers found /api-security OPTIONAL Skill(skill="api-security") cat ~/.config/opencode/commands/api-security.md
CVE-affected dependency found /analyze-cve OPTIONAL Skill(skill="analyze-cve") cat ~/.config/opencode/commands/analyze-cve.md

Read the full file on GitHub · 581 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. 7d ago First seen · 581 lines · 208 tokens per session scan A 2a1e5e8676bb

Subscribe to this mod's changes

codebase is a skill published in the GitHub repository ShulkwiSEC/bb-huge (22 stars, last pushed 2mo ago), licensed MIT. It adds 208 tokens to every session and 8,071 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 2 findings (unrestricted tool access, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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