add-source

add-source is a skill for Claude Code from gtapps/claude-code-hermit. It costs 56 tokens per session (491 once invoked), scanned A, original, MIT.

An interactive helper for adding a new web, RSS, Reddit, or social-media source to a feed list. It checks the URL, name, source type, and category before adding it.

In plain words
What is it for?
Use it to maintain the active sources table in a feed-monitoring project.
Why use it?
It prevents malformed URLs, duplicate source names, invalid categories, and incorrectly formatted entries.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the feed-hermit plugin — 7 skills, 1 agent shipped together

Good fit Use it to maintain the active sources table in a feed-monitoring project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gtapps/claude-code-hermit/add-source
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 gtapps/claude-code-hermit --skill add-source
Clone the repo
git clone --depth 1 https://github.com/gtapps/claude-code-hermit

Made for: Claude Code.

Or install feed-hermit, the plugin that ships this one along with the rest of its 7 skills, 1 agent.

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 add-source

README.md
[![agentmods](https://agentmods.dev/badge/skills/gtapps/claude-code-hermit/add-source.svg)](https://agentmods.dev/skills/gtapps/claude-code-hermit/add-source)
Your own site
<a href="https://agentmods.dev/skills/gtapps/claude-code-hermit/add-source"><img src="https://agentmods.dev/badge/skills/gtapps/claude-code-hermit/add-source.svg" alt="Measured on agentmods" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 491 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00056 $0.00491
Opus 5 $0.00028 $0.00246
Sonnet 5 $0.00011 $0.00098
Haiku 4.5 $0.00006 $0.00049

Measured 3d ago against content hash eebb365458be, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

add-source 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.

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.

plugins/feed-hermit/skills/add-source/SKILL.md · 43 lines

What it actually says

Add Source

Add a new entry to feed-sources.md, enforcing the correct table format and source type.

Steps

  1. Collect inputs — ask the operator for:

    • Name: short display name (e.g. "The Daily Dispatch").
    • URL: full URL to the source.
    • Category: must match one of the categories in feed-categories.md — read that file first and present the options.
    • Type (optional — infer if not provided):
      • URL contains reddit.comreddit
      • URL contains twitter.com or x.comx
      • URL ends in .rss, .atom, or /feedrss
      • URL is a known WebFetch blocker (a domain that blocks server-side fetch and requires a browser) → chrome
      • Otherwise → web
    • Notes (optional): brief description of what the source covers.
  2. Validate:

    • URL must start with https://.
    • Name must not already exist in feed-sources.md — read the file and check.
    • Category must match an existing category from feed-categories.md.
  3. Read feed-sources.md to confirm the current table structure, then append the new row under ## Active Sources:

    | {Name} | {URL} | {Category} | {Type} | {Notes} |
    

    Align columns with the existing table width. Insert alphabetically by Name within the same category, or at the end if unsure.

  4. Confirm — show the operator the new row before writing. Write only after confirmation.

  5. Note in session — append to SHELL.md Progress Log: [HH:MM] Added source: {Name} ({Type}) to {Category}.

  6. Mention in next brief — new source additions are mentioned automatically in the next brief (no action needed here).

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. 3d ago First seen · 43 lines · 56 tokens per session scan A eebb365458be

Subscribe to this mod's changes

add-source is a skill published in the GitHub repository gtapps/claude-code-hermit (74 stars, last pushed today), licensed MIT. It adds 56 tokens to every session and 491 once invoked, about $0.0003 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 2026-09-03.