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 anotb/x-signal --skill x-monitoringgit clone --depth 1 https://github.com/anotb/x-signalWrote 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/anotb/x-signal/x-monitoring)<a href="https://agentmods.dev/skills/anotb/x-signal/x-monitoring"><img src="https://agentmods.dev/badge/skills/anotb/x-signal/x-monitoring/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/anotb/x-signal/x-monitoring"><img src="https://agentmods.dev/badge/skills/anotb/x-signal/x-monitoring.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 | $0.00039 | $0.00286 |
| Opus 5 | $0.00019 | $0.00143 |
| Sonnet 5 | $0.00008 | $0.00057 |
| Haiku 4.5 | $0.00004 | $0.00029 |
Grade A, and why
x-monitoring 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 yesterday.
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
X monitoring
- Call
x_monitorwithlistand reuse a monitor when its sources and cadence match. - Create explicit labeled queries, accounts, optional Following, cadence, filters, and optional webhook or ntfy sink. Report it active only after successful creation.
- When current output is requested, call
runimmediately; scheduled activation alone is not a current result. - Run
resultsto compare successive captured samples. Report newly observed and no-longer-observed posts, meaningful metric and author changes, lexical cluster shifts, partial legs, and delivery state. Absence from a sample does not establish deletion. - Preserve direct X links from the stored run. Use
pause,resume,update, ordeleteonly when the user asks for that state change.
Collection continues on its configured cadence while notification delivery retries in capture order. Inspect the monitor's delivery health for pending notifications, last captured run, next capture, and next delivery attempt. The delivered baseline advances only after successful delivery; retrying a pending notification before the next capture is due does not repeat X work. Do not recreate a monitor to recover a broken sink.
What ships with it
1 file 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.
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.
- yesterday Changed · +2 lines d2bf73838517
- 12d ago First seen · 13 lines · 39 tokens per session scan A bc2a109e3729
x-monitoring is a skill published in the GitHub repository anotb/x-signal (1 stars, last pushed 2d ago), licensed MIT. It adds 39 tokens to every session and 286 once invoked, about $0.0002 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.
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