blogwatcher

blogwatcher is a skill for Claude Code, Codex from Threat-Vector-Security/guardian-agent. It costs 0 tokens per session (250 once invoked), scanned A, original, Apache-2.0.

A command-line tool for tracking new posts from blogs and RSS or Atom feeds. RSS and Atom are standard formats websites use to publish update lists.

In plain words
What is it for?
Use it to add or remove blogs, scan for new articles, list tracked articles, and mark articles as read.
Why use it?
It collects updates from multiple sites in one place, so you do not need to check each blog manually.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to add or remove blogs, scan for new articles, list tracked articles, and mark articles as read.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/threat-vector-security/guardian-agent/blogwatcher
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.

Any agent
npx skills add Threat-Vector-Security/guardian-agent --skill blogwatcher
Clone the repo
git clone --depth 1 https://github.com/Threat-Vector-Security/guardian-agent

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for blogwatcher

README.md
[![agentmods](https://agentmods.dev/badge/skills/threat-vector-security/guardian-agent/blogwatcher.svg)](https://agentmods.dev/skills/threat-vector-security/guardian-agent/blogwatcher)
Your own site
<a href="https://agentmods.dev/skills/threat-vector-security/guardian-agent/blogwatcher"><img src="https://agentmods.dev/badge/skills/threat-vector-security/guardian-agent/blogwatcher.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 250 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00250
Opus 5 $0.00000 $0.00125
Sonnet 5 $0.00000 $0.00050
Haiku 4.5 $0.00000 $0.00025

Measured 7d ago against content hash 9081ba5b580a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

blogwatcher 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 7d 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.

skills/blogwatcher/SKILL.md · 40 lines

What it actually says

Blogwatcher

Track blog and RSS/Atom feed updates with the blogwatcher CLI.

Install

  • Go: go install github.com/Hyaxia/blogwatcher/cmd/blogwatcher@latest

Quick start

  • blogwatcher --help

Common commands

  • Add a blog: blogwatcher add "My Blog" https://example.com
  • List blogs: blogwatcher blogs
  • Scan for updates: blogwatcher scan
  • List articles: blogwatcher articles
  • Mark an article read: blogwatcher read 1
  • Mark all articles read: blogwatcher read-all
  • Remove a blog: blogwatcher remove "My Blog"

Example output

$ blogwatcher blogs
Tracked blogs (1):

  xkcd
    URL: https://xkcd.com
$ blogwatcher scan
Scanning 1 blog(s)...

  xkcd
    Source: RSS | Found: 4 | New: 4

Found 4 new article(s) total!

Notes

  • Use blogwatcher <command> --help to discover flags and options.
Files

What ships with it

2 files 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.

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.

  1. 7d ago First seen · 40 lines · 0 tokens per session scan A 9081ba5b580a

Subscribe to this mod's changes

blogwatcher is a skill published in the GitHub repository Threat-Vector-Security/guardian-agent (11 stars, last pushed today), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 250 tokens. 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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