agentmods.dev

hn-radar

hn-radar is a skill for Claude Code, Codex from YuxuanSha/openceph. It costs 52 tokens per session (811 once invoked), scanned A, original, MIT.

A Hacker News monitoring tool that fetches recent posts, filters them for relevance, and reports selected items for notification. Hacker News is a news and discussion site for the technology community.

In plain words
What is it for?
Use it to monitor newest posts, the front page, or searches; filter by relevance, score, and comments; scan frequently; and send notable results to Brain.
Why use it?
It reduces the need to manually scan many posts and lets users choose between language-model filtering and score or comment thresholds.

Skill for Claude CodeCodex

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

not rated 12repo +1 7mo ago A scan 52 tokens original MIT

Good fit Use it to monitor newest posts, the front page, or searches; filter by relevance, score, and comments; scan frequently; and send notable results to Brain.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/yuxuansha/openceph/hn-radar
View source ↗ YuxuanSha/openceph openceph.com
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 YuxuanSha/openceph --skill hn-radar
Clone the repo
git clone --depth 1 https://github.com/YuxuanSha/openceph

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 hn-radar

README.md
[![agentmods](https://agentmods.dev/badge/skills/yuxuansha/openceph/hn-radar/github.svg)](https://agentmods.dev/skills/yuxuansha/openceph/hn-radar)
Your own site
<a href="https://agentmods.dev/skills/yuxuansha/openceph/hn-radar"><img src="https://agentmods.dev/badge/skills/yuxuansha/openceph/hn-radar/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 hn-radar

Your own site · 80×15
<a href="https://agentmods.dev/skills/yuxuansha/openceph/hn-radar"><img src="https://agentmods.dev/badge/skills/yuxuansha/openceph/hn-radar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 811 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 $0.00052 $0.00811
Opus 5.5 $0.00021 $0.00324
Sonnet 5.5 $0.00010 $0.00162
Haiku 4.5 $0.00005 $0.00081

Measured 2mo ago against content hash 60fdc3ed9223, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hn-radar 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 2mo ago.

The scan reads SKILL.md. This mod also ships 5 executable files (src/filter_engine.py, src/hn_fetcher.py, src/hn_tools.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.

builtin-tentacles/hn-radar/SKILL.md · 87 lines

What it actually says

HN Radar

General-purpose Hacker News monitoring tentacle. Fetches latest posts by default, runs each through LLM-powered smart screening, and reports worthy items to Brain for user notification.

Works Out of the Box

  • Default data source: newest (all latest posts, no score threshold)
  • Default filtering: LLM-powered smart evaluation (USE_LLM_FILTER=true)
  • Works immediately after deployment, no additional configuration needed

Custom Modes

  • Traditional mode: USE_LLM_FILTER=false + HN_MIN_SCORE=50 + HN_MIN_COMMENTS=20
  • Multiple data sources: HN_FEEDS=newest,frontpage,search
  • High-frequency scanning: HN_INTERVAL_SECONDS=60
Files

What ships with it

18 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. 2mo ago First seen · 87 lines · 52 tokens per session scan A 60fdc3ed9223

Subscribe to this mod's changes

hn-radar is a skill published in the GitHub repository YuxuanSha/openceph (12 stars, last pushed 7mo ago), licensed MIT. It adds 52 tokens to every session and 811 once invoked, about $0.0002 per session on Opus 5.5. 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.

Researchaiai-agentsopenclawpersonalproactive-ai
Related

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