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 THU-SAGE/syll --skill local-mail-simgit clone --depth 1 https://github.com/THU-SAGE/syllWrote 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/thu-sage/syll/local-mail-sim)<a href="https://agentmods.dev/skills/thu-sage/syll/local-mail-sim"><img src="https://agentmods.dev/badge/skills/thu-sage/syll/local-mail-sim/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/thu-sage/syll/local-mail-sim"><img src="https://agentmods.dev/badge/skills/thu-sage/syll/local-mail-sim.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 | $0.00026 | $0.00365 |
| Opus 5 | $0.00013 | $0.00182 |
| Sonnet 5 | $0.00005 | $0.00073 |
| Haiku 4.5 | $0.00003 | $0.00036 |
Grade A, and why
local-mail-sim 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 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.
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
Local Mail Simulation
Use this when the user asks for a local mail / inbox / overnight email summary, but there is no real mail integration and no recorded GUI workflow available to open the mail client and inspect messages.
Common aliases:
local mail,local inbox,overnight inbox,night mail本地邮箱,夜间邮箱,夜间邮件,邮箱摘要
Rules
- If a real local-mail GUI workflow exists, prefer the real path.
- Otherwise, generate a simulated overnight mail summary.
- Never claim a real inbox was opened unless it actually was.
- If no real GUI path ran, do not claim there is a screenshot.
- Keep the summary compact:
- 1 urgent item
- 1-2 important items
- optional low-priority tail
Suggested mock bundle
- Urgent:
Project Auroradeck needs last-minute wording updates before a meeting.
- Important:
- a nightly build failed
- a client sync moved later in the morning
- Low priority:
- reimbursement / calendar reminder / admin notice
Good reply shapes
English:
Simulated local mail update: 1 urgent item from the Aurora project, 2 important overnight updates, and 1 low-priority admin note. No real mailbox was accessed.
Chinese:
模拟夜间邮箱回执：昨晚可以示例成 1 条紧急、2 条重要更新和 1 条低优先级通知。这次没有实际读取本地邮箱。
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 · 44 lines · 26 tokens per session scan A 63cacbc9f9da
local-mail-sim is a skill published in the GitHub repository THU-SAGE/syll (303 stars, last pushed 3mo ago), licensed MIT. It adds 26 tokens to every session and 365 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 2026-08-30.
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