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 AdvancingTitans/agent-engineering-toolkit --skill aet-checkgit clone --depth 1 https://github.com/AdvancingTitans/agent-engineering-toolkitWrote 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/advancingtitans/agent-engineering-toolkit/aet-check)<a href="https://agentmods.dev/skills/advancingtitans/agent-engineering-toolkit/aet-check"><img src="https://agentmods.dev/badge/skills/advancingtitans/agent-engineering-toolkit/aet-check/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/advancingtitans/agent-engineering-toolkit/aet-check"><img src="https://agentmods.dev/badge/skills/advancingtitans/agent-engineering-toolkit/aet-check.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 | $0.00043 | $0.00411 |
| Opus 5.5 | $0.00017 | $0.00164 |
| Sonnet 5.5 | $0.00009 | $0.00082 |
| Haiku 4.5 | $0.00004 | $0.00041 |
Grade A, and why
aet-check 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 2mo 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
/aet-check
Answer one question: are this repository's Agent engineering assets usable and honest about verification?
Boundary
- Start with
aet quick check <root> --format json. - Read only Agent instructions, Skills, README, package/test configuration, CI, and files directly relevant to the finding.
- Do not read complete Git history, execute project code, access credentials, write files, or call remote tools by default.
- The deterministic preflight owns
PASS,FAIL,UNKNOWN, andNOT_APPLICABLE. Never rewrite them.
Investigation
The host LLM may form at most three competing hypotheses and use authorized
tools to clarify project-specific meaning. Every factual claim needs a
hash-bound result_ref; inspect a reasonable counter-explanation before
issuing SUPPORTED. Preserve the distinction between facts, engineering
judgment, uncertainty, and suggested action.
Before rendering an Investigated Finding, pass the canonical Finding, Ledger,
authorized-tool set, and Investigation Contract through
aet.investigation.validate_investigated_finding. If that API is unavailable
or rejects the record, preserve HYPOTHESIS/UNKNOWN and disclose why.
Budget: 30 seconds, three rounds, at most two LLM calls, six tool calls, one expensive call, zero remote calls, and five reported findings.
If the user invoked /aet-check in Chinese and asked in Chinese, explain the
result in natural Simplified Chinese while keeping code and required technical
terms in English. Otherwise use English.
Emit the bounded report, disclose uninspected surfaces, and stop. Do not start Scope, Proof, Fresh, Learn, Gate, Stage, Adopt, or a repair.
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.
- 2mo ago First seen · 43 lines · 43 tokens per session scan A 8061a680635c
aet-check is a skill published in the GitHub repository AdvancingTitans/agent-engineering-toolkit (2 stars, last pushed 2mo ago), licensed MIT. It adds 43 tokens to every session and 411 once invoked, about $0.0002 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 2026-08-31.
Other skills, from other repositories
feishu
Work with Feishu or Lark bots, docs, sheets, bitables, approval flows, and OpenAPI/MCP setup without hardcoding credentials.
interview
Ask one useful structured question at a time only when material product/implementation choices are genuinely missing; remember answers and produce a brief/spec. Discoverable facts should be investigated instead of asked.
recipe-create-meet-space
Create a Google Meet meeting space and share the join link.
refocusing
Use when a long-running agent may have lost the product outcome, when context was compacted, when work has crossed a major boundary, or when a fresh path-based trace is needed before the next consequential action. Not for fresh-session orientation, waking an idle seat, or checkpoints.
printing-press-import
Bring a published CLI from the public library into the internal library so it's identical to a freshly-generated copy — module path reverted, manuscripts placed alongside, ready for /printing-press-polish or /printing-press-emboss. Use when the public library has a CLI you don't have locally, or to recover from a…
atmos-validation
Validate Atmos projects, components, arbitrary JSON Schema inputs, EditorConfig, and GitHub Actions; use affected-file selection and native CI annotations.