blogwatcher

blogwatcher is a skill for Claude Code, Codex from perasyudha/Nyxora. It costs 18 tokens per session (1,438 once invoked), scanned A, a copy of blogwatcher, MIT.

A monitor for blogs and RSS or Atom feeds, which are standard formats websites use to publish lists of new articles. It uses a command-line tool to discover feeds, track articles, and manage read status.

In plain words
What is it for?
Watching blogs and feeds for new posts, discovering feeds automatically, importing OPML subscriptions, and marking articles read or unread.
Why use it?
It removes the need to check many blogs by hand and can fall back to scraping a webpage when a normal feed is not available. OPML import helps bring in an existing feed list.

Skill for Claude CodeCodex

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

Good fit Watching blogs and feeds for new posts, discovering feeds automatically, importing OPML subscriptions, and marking articles read or unread.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/perasyudha/nyxora/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 perasyudha/Nyxora --skill blogwatcher
Clone the repo
git clone --depth 1 https://github.com/perasyudha/Nyxora

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/perasyudha/nyxora/blogwatcher/github.svg)](https://agentmods.dev/skills/perasyudha/nyxora/blogwatcher)
Your own site
<a href="https://agentmods.dev/skills/perasyudha/nyxora/blogwatcher"><img src="https://agentmods.dev/badge/skills/perasyudha/nyxora/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.

agentmods 80×15 button for blogwatcher

Your own site · 80×15
<a href="https://agentmods.dev/skills/perasyudha/nyxora/blogwatcher"><img src="https://agentmods.dev/badge/skills/perasyudha/nyxora/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 1,438 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 91% 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00018 $0.01438
Opus 5 $0.00009 $0.00719
Sonnet 5 $0.00004 $0.00288
Haiku 4.5 $0.00002 $0.00144

Measured 10d ago against content hash e5b06055b360, 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 10d 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

91% identical to blogwatcher — 14 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.

packages/core/playbooks/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.

  1. 10d ago First seen · 138 lines · 18 tokens per session scan A e5b06055b360

Subscribe to this mod's changes

blogwatcher is a skill published in the GitHub repository perasyudha/Nyxora (5 stars, last pushed 10d ago), licensed MIT. It adds 18 tokens to every session and 1,438 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 91% identical to blogwatcher, differing in 14 lines, and is treated as a copy.

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