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 allsmog/blackbox-claude-plugin --skill ctf-writeup-lookupgit clone --depth 1 https://github.com/allsmog/blackbox-claude-pluginWrote 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/allsmog/blackbox-claude-plugin/ctf-writeup-lookup)<a href="https://agentmods.dev/skills/allsmog/blackbox-claude-plugin/ctf-writeup-lookup"><img src="https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/ctf-writeup-lookup/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/allsmog/blackbox-claude-plugin/ctf-writeup-lookup"><img src="https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/ctf-writeup-lookup.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 | $0.00092 | $0.01124 |
| Opus 5 | $0.00046 | $0.00562 |
| Sonnet 5 | $0.00018 | $0.00225 |
| Haiku 4.5 | $0.00009 | $0.00112 |
Grade A, and why
CTF Writeup Lookup scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s "https://0xdf.gitlab.io/" | grep -i "$MACHINE" | head -5 How it starts
The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CTF Writeup Lookup Skill
When to Use
Use this skill EARLY when:
- You've been stuck for more than 10-15 minutes
- The only remaining option seems to be brute forcing
- You find an unusual service with no obvious exploit
- User explicitly asks for writeup
- Machine name is known (search: "HTB <machine_name> writeup")
Search Strategies
HackTheBox Machines
# Primary search
"HackTheBox <machine_name> writeup"
"HTB <machine_name> walkthrough"
# With service focus
"HTB <machine_name> <service> exploit"
"HackTheBox <machine_name> privilege escalation"
TryHackMe Rooms
"TryHackMe <room_name> writeup"
"THM <room_name> walkthrough"
Generic CTF
"<ctf_name> <challenge_name> writeup"
"<challenge_name> CTF solution"
Quality Sources
Tier 1 (Most Reliable)
- 0xdf.gitlab.io - Detailed, well-explained
- ippsec.rocks - Video walkthroughs with transcripts
- HackTheBox Official - After machine retires
Tier 2 (Good Coverage)
- Medium.com - Many writeups, variable quality
- infosecwriteups.com - Curated content
- GitHub repos - Often have exploit scripts
Tier 3 (Quick Reference)
- YouTube - Visual walkthroughs
- Personal blogs - May have unique approaches
What to Extract from Writeups
Initial Access
- Exact CVE or vulnerability used
- Exploit command/script
- Credentials found
- Service-specific tricks
Privilege Escalation
- Exact technique (SUID, cron, capability, etc.)
- Password/key locations
- Service misconfigurations
- Intended vs unintended paths
Key Information Template
## Writeup Summary: <Machine Name>
### Initial Access
- **Vector**: <CVE/technique>
- **Service**: <service name and version>
- **Exploit**: <command or script>
- **Creds Found**: <username:password if any>
### User Privilege Escalation
- **From**: <initial user>
- **To**: <target user>
- **Method**: <technique>
- **Key Finding**: <password location, config file, etc.>
### Root Privilege Escalation
- **Method**: <technique>
- **CVE**: <if applicable>
- **Key Finding**: <what to look for>
### Credentials Discovered
| Username | Password | Source |
|----------|----------|--------|
| <user> | <pass> | <where found> |
### Files to Check
- <path/to/important/file>
- <another/key/location>
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.
- 10d ago First seen · 173 lines · 92 tokens per session scan A 081054203d06
CTF Writeup Lookup is a skill published in the GitHub repository allsmog/blackbox-claude-plugin (5 stars, last pushed 6mo ago), licensed MIT. It adds 92 tokens to every session and 1,124 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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