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 JustineDevs/premortem --skill dast-automationgit clone --depth 1 https://github.com/JustineDevs/premortemWrote 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/justinedevs/premortem/dast-automation)<a href="https://agentmods.dev/skills/justinedevs/premortem/dast-automation"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/dast-automation/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/justinedevs/premortem/dast-automation"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/dast-automation.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 | $0.00081 | $0.02165 |
| Opus 5 | $0.00041 | $0.01082 |
| Sonnet 5 | $0.00016 | $0.00433 |
| Haiku 4.5 | $0.00008 | $0.00216 |
Grade A, and why
dast-automation 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 9d 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 — 176 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DAST Automation with Playwright MCP
Thin router. Specific guidance lives in workflows/, methodology/, payloads/, and examples/. Read this file first, then lazy-load only the files you need for the task.
When to Use
- Operator asks for a DAST / dynamic security scan of one or more web apps.
- Blackbox external scan of a single domain.
- Greybox (authenticated) scan with provided credentials.
- Parallel scanning across a fleet of domains.
- Setting up continuous / scheduled DAST with baseline diffing.
- CI/CD integration to block regressions on new Critical/High issues.
Trigger Phrases
"scan ", "run DAST", "blackbox scan", "greybox scan", "authenticated pentest", "spider and test this app", "security-test these URLs", "weekly security scan", "continuous DAST".
When NOT to Use This Skill
- Source-code SAST / dependency CVEs → use
sast-automation/sca-automation. - Container image CVE scanning → use
container-security. - IaC / Terraform / K8s manifest misconfig scanning → use
iac-security. - Mobile app runtime testing (Frida, MASTG) → use
mobile-security. - Network/host hardening audit without web surface → use
network-audit. - Manual bug-bounty research on a single target → use this skill for surface mapping but switch to
hackerone-researchfor narrative PoC work.
Decision Tree
Domains = 1 ──→ creds provided? ──→ no → workflows/blackbox_single_domain.md
└─→ yes → workflows/greybox_authenticated.md
Domains ≥ 2 ──→ one-shot scan ──→ workflows/multi_domain_parallel.md
└→ recurring schedule ─→ workflows/continuous_scanning.md
Any mode ──→ emit schemas/finding.json → methodology/reporting.md
Parallelism Hints
Independent — run concurrently:
- Phase 0 recon tools:
nmap,whatweb,ffuf,subfinder, root-levelnuclei. - Per-injection-class test batches (XSS, SQLi, SSRF, path traversal, CRLF) after crawl finishes.
- One sub-agent per domain in multi-domain mode.
- One sub-agent per low-priv account when running IDOR diff.
What ships with it
42 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.
- assets/config/scanning.yaml 1.2 KB
- assets/config/scope.yaml 958 B
- assets/payloads/sqli_payloads.txt 463 B
- assets/payloads/xss_payloads.txt 705 B
- examples/blackbox_basic.md 1.0 KB
- examples/continuous_setup.md 1.4 KB
- examples/github_actions_dast.yml 2.8 KB
- examples/greybox_multi_domain.md 1.4 KB
- methodology/crawling.md 2.8 KB
- methodology/recon.md 2.2 KB
- methodology/reporting.md 2.6 KB
- methodology/vuln_testing.md 3.9 KB
- payloads/business_logic.txt 2.4 KB
- payloads/crlf_smuggling.txt 1.4 KB
- payloads/jwt_attacks.txt 1.4 KB
- payloads/path_traversal.txt 1.4 KB
- payloads/sqli.txt 1.8 KB
- payloads/ssrf_cloud_metadata.txt 2.2 KB
- payloads/xss_contexts.txt 1.7 KB
- README.md 7.0 KB
- references/advanced_exploitation_techniques.md 19 KB
- references/api_testing.md 7.5 KB
- references/bounty_patterns_2024_2026.md 11 KB
- references/dast_methodology.md 12 KB
- references/hackerone_attack_patterns.md 28 KB
- references/playwright_security_patterns.md 31 KB
- references/reporting_guide.md 11 KB
- references/tool_configuration.md 7.8 KB
- references/vulnerability_testing.md 21 KB
- schemas/finding.json 2.9 KB
- scripts/check_findings.py 4.2 KB runs code
- scripts/continuous_dast.sh 5.3 KB runs code
- scripts/dast_orchestrator.py 7.7 KB runs code
- scripts/nuclei_runner.py 7.9 KB runs code
- scripts/playwright_crawler.py 9.5 KB runs code
- scripts/playwright_dast_scanner.py 13 KB runs code
- scripts/report_generator.py 11 KB runs code
- scripts/vulnerability_tester.py 15 KB runs code
- workflows/blackbox_single_domain.md 3.2 KB
- workflows/continuous_scanning.md 2.5 KB
- workflows/greybox_authenticated.md 3.4 KB
- workflows/multi_domain_parallel.md 2.5 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.
- 9d ago First seen · 176 lines · 81 tokens per session scan A 909359307918
dast-automation is a skill published in the GitHub repository JustineDevs/premortem (2 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 81 tokens to every session and 2,165 once invoked, about $0.0004 per session on Opus 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 2026-09-03.
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