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 agentmods add skills/coolight7/agentxx/extra_skillnpx skills add coolight7/agentxx --skill extra_skillgit clone --depth 1 https://github.com/coolight7/agentxxWhat 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 | $0.00024 | $0.00091 |
| Opus 5 | $0.00012 | $0.00046 |
| Sonnet 5 | $0.00005 | $0.00018 |
| Haiku 4.5 | $0.00002 | $0.00009 |
Grade A, and why
extra-skill 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 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.
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
Extra Skill
A demo skill contributed by the example_resources plugin at runtime
(vtable register_skill_dir, not the declarative manifest section).
Workflow:
- Confirm you can see this skill.
- Explain that it was registered by plugin code during load, not by plugin.yaml.
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.
- 2d ago First seen · 15 lines · 24 tokens per session scan A 3076b8dd0f3c
extra-skill is a skill published in the GitHub repository coolight7/agentxx (5 stars, last pushed 2d ago), licensed MIT. It adds 24 tokens to every session and 91 once invoked, about $0.0001 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 2026-08-31.
Other skills, from other repositories
defense-evasion
Endpoint defense bypass — AMSI/ETW patching, ScareCrow framework, custom loaders, direct/indirect syscalls, LOLBAS execution, process injection.
opsec
Operational security management — traffic shaping, scan rate limiting, source IP management, tool signature avoidance, evidence handling, anti-detection patterns.
benchmark
Benchmark mode marker — engagement objective is flag capture. Generic engagement rules apply unchanged.
seven-question-gate
7-question gate run before promoting a finding to FINDING + opening a report. Kills weak/non-impactful findings before they reach the report stage and damage validity ratio.
finding-protocol
Operational-tier finding template — minimal fields for sub-agent decision support. Heavyweight deliverable promotion lives in skills/decepticon/final-report.
bloodhound-bhce
Operate BloodHound Community Edition v9.2.2 via Decepticon's bhce tools — health check, Cypher passthrough, SharpHound ZIP ingest. Replaces the in-house ingest + ESC post-process pipeline per ADR-0005.