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 roedyrustam/vibes-plug --skill proactive-background-watchergit clone --depth 1 https://github.com/roedyrustam/vibes-plugWrote 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/roedyrustam/vibes-plug/proactive-background-watcher)<a href="https://agentmods.dev/skills/roedyrustam/vibes-plug/proactive-background-watcher"><img src="https://agentmods.dev/badge/skills/roedyrustam/vibes-plug/proactive-background-watcher.svg" alt="Measured on agentmods" 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 | $0.00046 | $0.00963 |
| Opus 5 | $0.00023 | $0.00481 |
| Sonnet 5 | $0.00009 | $0.00193 |
| Haiku 4.5 | $0.00005 | $0.00096 |
Grade A, and why
proactive-background-watcher 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 3d 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.
3. **Execute:** When woken up by the timer prompt, execute your checks (e.g., read a log file, curl an API). How it starts
The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Proactive Background Watcher (Sentinel Agent)
English
Orchestration & Integration
Connects and orchestrates with relevant domain skills like brainstorming, zero-to-prod-orchestrator, and project-context-mapper to ensure cohesive execution.
Description
Standard LLM chat interfaces (like Claude or ChatGPT) are purely reactive—they do nothing until the user types a prompt. This skill gives Antigravity the "superpower" of proactivity. By utilizing the native schedule tool, the agent can set up background cron jobs or timers to monitor logs, poll APIs, or check CI/CD pipelines. If an anomaly is detected, the agent wakes up autonomously and alerts the user or fixes the issue.
Trigger Conditions
Activate this skill when:
- The user says "let me know when the deployment finishes."
- The user asks to "monitor the server for errors."
- The user wants a daily summary of new GitHub issues.
Core Concepts
1. The Sentinel Loop
- Schedule: Use the
scheduletool. Set either aDurationSeconds(e.g., check again in 5 minutes) or aCronExpression(e.g., run every hour0 * * * *). SetIsDaemon=trueif it's a long-running background watcher. - Sleep: End your turn. The system will automatically wake you up when the timer/cron fires.
- Execute: When woken up by the timer prompt, execute your checks (e.g., read a log file, curl an API).
- Evaluate: If everything is normal, go back to sleep (or set a new timer). If an anomaly is found, notify the user immediately with an alert.
2. Agent Constraints
- Do not spam the user. If a background check passes normally, do not write a message to the user. Only alert the user if action is required or a long-running task finally completes.
- Always provide a clear Prompt in the schedule tool: e.g., "Timer fired: Check Vercel deployment status now."
Integration with Other Skills (MANDATORY)
cron-scheduler-expert— Provides the code-level knowledge for building app-level crons, while this skill is for the agent's own native scheduling.ci-cd-devops-architect— Useful when the agent needs to watch GitHub Actions or Vercel pipelines.
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.
- 3d ago First seen · 69 lines · 46 tokens per session scan A a80c22606bc2
proactive-background-watcher is a skill published in the GitHub repository roedyrustam/vibes-plug (49 stars, last pushed 3d ago), licensed MIT. It adds 46 tokens to every session and 963 once invoked, about $0.0002 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 2026-09-03.
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