A command-line tool that watches blogs and RSS or Atom feeds for new articles. RSS and Atom are standard formats websites use to publish update lists.

Discovering feeds, importing OPML subscriptions, scraping sites without feeds, and managing articles as read or unread.

It collects updates from many sites and tracks what has been read, avoiding repeated manual checks.

blogwatcher — Skill for Claude Code and Codex by pedroiff0

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 pedroiff0/awesome-skills --skill blogwatcher

Clone the repo

git clone --depth 1 https://github.com/pedroiff0/awesome-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/pedroiff0/awesome-skills/blogwatcher/github.svg)](https://agentmods.dev/skills/pedroiff0/awesome-skills/blogwatcher)

Your own site

<a href="https://agentmods.dev/skills/pedroiff0/awesome-skills/blogwatcher"><img src="https://agentmods.dev/badge/skills/pedroiff0/awesome-skills/blogwatcher/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/pedroiff0/awesome-skills/blogwatcher"><img src="https://agentmods.dev/badge/skills/pedroiff0/awesome-skills/blogwatcher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,437 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin 94% copy Near-identical to another mod 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 5.1	$0.00018	$0.01437
Opus 5	$0.00009	$0.00718
Sonnet 5	$0.00004	$0.00287
Haiku 4.5	$0.00002	$0.00144

Measured 6d ago against content hash b85be5a9b86b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

blogwatcher 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 6d 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.

- **Binary (Linux amd64):** `curl -sL https://github.com/JulienTant/blogwatcher-cli/releases/latest/download/blogwatcher-cli_linux_amd64.tar.gz | tar xz -C /usr/local/bin blogwatcher-cli`

Origin

This is a copy

94% identical to blogwatcher — 10 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/research/blogwatcher/SKILL.md · 138 lines

How it starts

The opening of the file, as written. The whole thing — 138 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Blogwatcher

Track blog and RSS/Atom feed updates with the blogwatcher-cli tool. Supports automatic feed discovery, HTML scraping fallback, OPML import, and read/unread article management.

Installation

Pick one method:

Go: go install github.com/JulienTant/blogwatcher-cli/cmd/blogwatcher-cli@latest
Docker: docker run --rm -v blogwatcher-cli:/data ghcr.io/julientant/blogwatcher-cli
Binary (Linux amd64): curl -sL https://github.com/JulienTant/blogwatcher-cli/releases/latest/download/blogwatcher-cli_linux_amd64.tar.gz | tar xz -C /usr/local/bin blogwatcher-cli
Binary (Linux arm64): curl -sL https://github.com/JulienTant/blogwatcher-cli/releases/latest/download/blogwatcher-cli_linux_arm64.tar.gz | tar xz -C /usr/local/bin blogwatcher-cli
Binary (macOS Apple Silicon): curl -sL https://github.com/JulienTant/blogwatcher-cli/releases/latest/download/blogwatcher-cli_darwin_arm64.tar.gz | tar xz -C /usr/local/bin blogwatcher-cli
Binary (macOS Intel): curl -sL https://github.com/JulienTant/blogwatcher-cli/releases/latest/download/blogwatcher-cli_darwin_amd64.tar.gz | tar xz -C /usr/local/bin blogwatcher-cli

All releases: https://github.com/JulienTant/blogwatcher-cli/releases

Docker with persistent storage

By default the database lives at ~/.blogwatcher-cli/blogwatcher-cli.db. In Docker this is lost on container restart. Use BLOGWATCHER_DB or a volume mount to persist it:

# Named volume (simplest)
docker run --rm -v blogwatcher-cli:/data -e BLOGWATCHER_DB=/data/blogwatcher-cli.db ghcr.io/julientant/blogwatcher-cli scan

# Host bind mount
docker run --rm -v /path/on/host:/data -e BLOGWATCHER_DB=/data/blogwatcher-cli.db ghcr.io/julientant/blogwatcher-cli scan

Migrating from the original blogwatcher

If upgrading from Hyaxia/blogwatcher, move your database:

mv ~/.blogwatcher/blogwatcher.db ~/.blogwatcher-cli/blogwatcher-cli.db

The binary name changed from blogwatcher to blogwatcher-cli.

Read the full file on GitHub · 138 lines

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.

6d ago First seen · 138 lines · 18 tokens per session scan A b85be5a9b86b

Subscribe to this mod's changes

blogwatcher is a skill published in the GitHub repository pedroiff0/awesome-skills (1 stars, last pushed 3d ago), licensed MIT. It adds 18 tokens to every session and 1,437 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 94% identical to blogwatcher, differing in 10 lines, and is treated as a copy.

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