An RSS and Atom feed monitor. RSS and Atom are standard ways websites publish lists of new articles; the monitor checks configured feeds and returns entries it has not seen before.

Use it to watch sources such as Hacker News, arXiv, or blogs, check for updates on a schedule, and deliver new article links through an available channel.

It removes the need to open many websites and manually check whether anything new appeared. It also avoids sending the same article repeatedly by tracking previously seen entries.

rss-watcher — Skill by fuyuxiang

Install

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.

agentmods

npx agentmods add skills/fuyuxiang/echo-agent/rss-watcher

Any agent

npx skills add fuyuxiang/echo-agent --skill rss-watcher

Clone the repo

git clone --depth 1 https://github.com/fuyuxiang/echo-agent

Made for: Claude Code, Codex.

Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 440 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00025	$0.00440
Opus 5	$0.00013	$0.00220
Sonnet 5	$0.00005	$0.00088
Haiku 4.5	$0.00003	$0.00044

Measured 3d ago against content hash a5f241f7461e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

rss-watcher 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 3d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/feed_monitor.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/research/rss-watcher/SKILL.md · 70 lines

What it actually says

RSS Watcher

Monitor RSS/Atom feeds and get notified of new articles.

Configuration

Create ~/.echo-agent/feeds.yaml:

feeds:
  - url: https://hnrss.org/frontpage
    category: tech
    label: Hacker News
  - url: https://arxiv.org/rss/cs.AI
    category: ai
    label: arXiv AI
  - url: https://feeds.feedburner.com/ruanyifeng
    category: blog
    label: 阮一峰
poll_interval: "*/30 * * * *"  # every 30 minutes
max_items: 10

Usage

pip install feedparser

python3 scripts/feed_monitor.py check        # check all feeds for new items
python3 scripts/feed_monitor.py list         # list configured feeds
python3 scripts/feed_monitor.py add "https://example.com/feed.xml" --category tech

How It Works

Reads feed URLs from feeds.yaml
Parses via feedparser library
Tracks seen entries in SQLite (~/.echo-agent/feeds.db) by entry ID/link
Returns only new (unseen) entries
Delivers updates through active channel

Output Format

📰 New Articles:

[tech] Hacker News
  • Title of Article 1
    https://link-to-article.com
  • Title of Article 2
    https://link-to-article.com

[ai] arXiv AI
  • New Paper Title
    https://arxiv.org/abs/2406.xxxxx

Integration

Combine with Echo Agent's cron channel for automatic polling. Set poll_interval in feeds.yaml to control check frequency.

Files

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.

scripts/feed_monitor.py 3.1 KB runs code

Changes

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 · 70 lines · 25 tokens per session scan A a5f241f7461e

Subscribe to this mod's changes

rss-watcher is a skill published in the GitHub repository fuyuxiang/echo-agent (988 stars, last pushed 3d ago), licensed MIT. It adds 25 tokens to every session and 440 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.

Research agent agent-memory

rss-watcher

Getting it into your agent

What it costs to keep this loaded

Grade A, and why

Nothing flagged

What it actually says

RSS Watcher

Configuration

Usage

How It Works

Output Format

Integration

What ships with it

What this file has done since we first saw it

Other skills, from other repositories

pptx

ai-style

curly-quote-sft

writing

kungfu-agent-onboarding

research