CustomerNewsletter: Skill for Claude Code

.github/skills/kb-maintenance/SKILL.md

kb-maintenance is a skill for Claude Code, Codex from briancl2/CustomerNewsletter. It costs 69 tokens per session (616 once invoked), scanned A, original, MIT.

A knowledge-base maintenance step that polls RSS or Atom feeds for new entries and checks whether stored links still work. A knowledge base is a collection of organized reference information.

In plain words
What is it for?
Use it for monthly refreshes of the kb/ folder, link checks, source updates, and reports of what changed.
Why use it?
It helps find new material, broken links, redirects, and sources that need review before the knowledge base becomes outdated.

Skill for Claude CodeCodex

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

This is briancl2/CustomerNewsletter's own configuration. It tells Claude Code and Codex how to work on CustomerNewsletter itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything CustomerNewsletter configures →

Reuse

Borrowing it

Nothing to install: this file belongs to briancl2/CustomerNewsletter. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/briancl2/CustomerNewsletter/main/.github/skills/kb-maintenance/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/briancl2/CustomerNewsletter

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 kb-maintenance

README.md
[![agentmods](https://agentmods.dev/badge/skills/briancl2/customernewsletter/kb-maintenance/github.svg)](https://agentmods.dev/skills/briancl2/customernewsletter/kb-maintenance)
Your own site
<a href="https://agentmods.dev/skills/briancl2/customernewsletter/kb-maintenance"><img src="https://agentmods.dev/badge/skills/briancl2/customernewsletter/kb-maintenance/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 kb-maintenance

Your own site · 80×15
<a href="https://agentmods.dev/skills/briancl2/customernewsletter/kb-maintenance"><img src="https://agentmods.dev/badge/skills/briancl2/customernewsletter/kb-maintenance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 616 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 $0.00069 $0.00616
Opus 5 $0.00034 $0.00308
Sonnet 5 $0.00014 $0.00123
Haiku 4.5 $0.00007 $0.00062

Measured 9d ago against content hash d3cd7781971e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

kb-maintenance 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 9d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/check_link_health.py, scripts/poll_sources.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.

.github/skills/kb-maintenance/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

KB Maintenance

Keep the knowledge base current through automated polling and health checks.

Quick Start

  1. Poll feeds: python3 .github/skills/kb-maintenance/scripts/poll_sources.py [--dry-run]
  2. Check links: python3 .github/skills/kb-maintenance/scripts/check_link_health.py [--dry-run] [--sample N]
  3. Review delta report and fix broken links
  4. Update kb/SOURCES.yaml and kb/CURRENT_STATE_SNAPSHOT.md

Inputs

  • kb/SOURCES.yaml: Primary data source (47 entries with canonical URLs and feeds)
  • kb/CURRENT_STATE_SNAPSHOT.md: Current state documentation

Output

  • Delta report: what's new since last poll
  • Health report: broken links, redirects, status changes
  • Updated SOURCES.yaml (if fixes needed)

Core Workflow

Monthly Maintenance Cycle

  1. Poll feeds - Read SOURCES.yaml update_feeds, fetch RSS/Atom/API endpoints, identify new entries since last_checked date
  2. Check link health - Validate canonical_urls and latest_known.reference_url, report dead links and redirects
  3. Generate delta report - What's new, what's broken, what needs manual review
  4. Update sources - Fix broken URLs, update last_checked, add new sources if discovered
  5. Update snapshot - Refresh CURRENT_STATE_SNAPSHOT.md with current state

Feed Types

Type How to Poll Example
RSS/Atom Fetch XML, parse entries after last_checked GitHub Blog RSS
API Fetch JSON, filter by date JetBrains plugin API
none Manual check required Docs pages (no feed)

See maintenance-procedure.md for full workflow details.

Scripts

Reference

Done When

  • Feed polling completed (or --dry-run passed)
  • Link health check completed (or --dry-run passed)
  • Delta report generated
  • Broken links documented
  • SOURCES.yaml updated with last_checked dates

Read the full file on GitHub · 67 lines

Files

What ships with it

3 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. 9d ago First seen · 67 lines · 69 tokens per session scan A d3cd7781971e

Subscribe to this mod's changes

kb-maintenance is a skill published in the GitHub repository briancl2/CustomerNewsletter (11 stars, last pushed 3mo ago), licensed MIT. It adds 69 tokens to every session and 616 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 2026-08-30.

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