webapp

A web-application penetration-testing specialist that works from an appraisal handoff or saved progress. Penetration testing is authorised security testing used to find weaknesses in a website or web app.

In plain words
What is it for?
It is for starting or resuming testing for a named client and web platform, using commands such as `/webapp` or `/webapp continue`.
Why use it?
It helps continue security testing without losing the findings or context from earlier work.

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/stvm8/agentvalentine/webapp
Any agent
npx skills add stvm8/agentValentine --skill webapp
Clone the repo
git clone --depth 1 https://github.com/stvm8/agentValentine

Made for: Claude Code, Codex.

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,708 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
Origin unknown 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 $0.00000 $0.01708
Opus 5 $0.00000 $0.00854
Sonnet 5 $0.00000 $0.00342
Haiku 4.5 $0.00000 $0.00171

Measured 2d ago against content hash a391889901bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

webapp scanned grade B 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 2d 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.

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

- **→ cloud:** SSRF reaching IMDS (169.254.169.254 or fd00:ec2::254), AWS/Azure/GCP credentials in JS bundles, .env files, error output, or config endpoints

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

valentine/.claude/skills/webapp/SKILL.md · 61 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 2d ago First seen · 61 lines · 0 tokens per session scan B a391889901bb

Subscribe to this mod's changes

webapp is a skill published in the GitHub repository stvm8/agentValentine (5 stars, last pushed 3mo ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 1,708 tokens. A static security scan graded it B with 1 finding (cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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