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 Strategic-Automation/violin --skill web-appgit clone --depth 1 https://github.com/Strategic-Automation/violinWrote 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/strategic-automation/violin/web-app)<a href="https://agentmods.dev/skills/strategic-automation/violin/web-app"><img src="https://agentmods.dev/badge/skills/strategic-automation/violin/web-app/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/strategic-automation/violin/web-app"><img src="https://agentmods.dev/badge/skills/strategic-automation/violin/web-app.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00013 | $0.00521 |
| Opus 5.5 | $0.00005 | $0.00208 |
| Sonnet 5.5 | $0.00003 | $0.00104 |
| Haiku 4.5 | $0.00001 | $0.00052 |
Grade A, and why
web-app 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 1mo 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.
What it actually says
Web Application Security Testing
On-demand skill for web application input-validation and client-side vulnerability classes. The pentest orchestrator routes here when a discovered surface matches one class below. Load only the matched playbook with read_file; do not eagerly load every playbook.
When to Use
- A web route, parameter, body field, upload, parser, template, or client-side sink is in scope.
- Recon identifies an injection sink, unsafe deserialization, XML parser, or JavaScript object merge.
- Do not use for authorization/session flaws, API protocol coverage, or workflow abuse; use the routed specialist skill.
Playbook Routing
| Class | Playbook |
|---|---|
| SQL Injection | playbooks/sqli.md |
| Cross-Site Scripting | playbooks/xss.md |
| Command Injection | playbooks/command-injection.md |
| Server-Side Request Forgery | playbooks/ssrf.md |
| Path Traversal / LFI | playbooks/path-traversal.md |
| Server-Side Template Injection | playbooks/ssti.md |
| XXE / XML Entity Injection | playbooks/xxe.md |
| NoSQL Injection | playbooks/nosql-injection.md |
| LDAP Injection | playbooks/ldap-injection.md |
| XPath Injection | playbooks/xpath-injection.md |
| Prototype Pollution | playbooks/prototype-pollution.md |
| Insecure Deserialization | playbooks/deserialization.md |
| Improper Input Validation | playbooks/input-validation.md |
Common Pitfalls
- Run target-touching checks only through the authorized Violin execution tools.
- Read the matched playbook's stop conditions before validation.
- Store redacted proof under
$ENG_DIR/evidence/exploitation/<class>/.
Verification Checklist
- Engagement bootstrap and scope validation succeeded.
- The matched playbook alone was loaded and bound to the PTT task.
- Evidence captures the baseline and the decisive differential response.
What ships with it
13 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.
- playbooks/command-injection.md 5.8 KB
- playbooks/deserialization.md 10.0 KB
- playbooks/input-validation.md 7.0 KB
- playbooks/ldap-injection.md 7.4 KB
- playbooks/nosql-injection.md 4.9 KB
- playbooks/path-traversal.md 5.8 KB
- playbooks/prototype-pollution.md 6.8 KB
- playbooks/sqli.md 7.2 KB
- playbooks/ssrf.md 5.5 KB
- playbooks/ssti.md 3.6 KB
- playbooks/xpath-injection.md 6.0 KB
- playbooks/xss.md 8.8 KB
- playbooks/xxe.md 9.4 KB
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.
- 1mo ago First seen · 53 lines · 13 tokens per session scan A 77400b33beee
web-app is a skill published in the GitHub repository Strategic-Automation/violin (153 stars, last pushed 2d ago), licensed MIT. It adds 13 tokens to every session and 521 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 2026-08-30.
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