CardBenefits

CardBenefits is a skill for Claude Code, Codex from danielmiessler/LifeOS. It costs 137 tokens per session (1,420 once invoked), scanned A, original, MIT.

A personal tracker for credit cards, card benefits, annual credits, and points or miles balances. It turns that information into card choices, unused-credit checks, and redemption plans without moving money or making bookings.

In plain words
What is it for?
Use it to find the best card for a purchase, review unused credits and perks, update points balances, and plan transfers or travel redemptions.
Why use it?
Benefits and balances change, and stale or unverified information can lead to poor choices. It keeps the user's own files as the source and flags information that needs checking.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: reads .claude/ paths.

Good fit Use it to find the best card for a purchase, review unused credits and perks, update points balances, and plan transfers or travel redemptions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/danielmiessler/lifeos/cardbenefits
About the project

LifeOS is an AI-assisted personal operating system that records a person’s goals, values, context, and current situation to help move them toward a desired future state. It supports work such as building applications, starting businesses, and creative projects. Its catalogue entries extend the system through skills, hooks, agents, and commands.

danielmiessler/LifeOS · 19,717 stars · on GitHub · ourlifeos.ai

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 danielmiessler/LifeOS --skill cardbenefits
Clone the repo
git clone --depth 1 https://github.com/danielmiessler/LifeOS

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 CardBenefits

README.md
[![agentmods](https://agentmods.dev/badge/skills/danielmiessler/lifeos/cardbenefits/github.svg)](https://agentmods.dev/skills/danielmiessler/lifeos/cardbenefits)
Your own site
<a href="https://agentmods.dev/skills/danielmiessler/lifeos/cardbenefits"><img src="https://agentmods.dev/badge/skills/danielmiessler/lifeos/cardbenefits/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 CardBenefits

Your own site · 80×15
<a href="https://agentmods.dev/skills/danielmiessler/lifeos/cardbenefits"><img src="https://agentmods.dev/badge/skills/danielmiessler/lifeos/cardbenefits.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 137 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,420 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 $0.00137 $0.01420
Opus 5.5 $0.00055 $0.00568
Sonnet 5.5 $0.00027 $0.00284
Haiku 4.5 $0.00014 $0.00142

Measured 10d ago against content hash 87708d2f39c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

CardBenefits 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 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.

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.

LifeOS/install/skills/CardBenefits/SKILL.md · 81 lines

How it starts

The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CardBenefits

Single source of truth for the principal's credit cards, their perks and points balances, and the planning layer that turns points into trips.

Ideal State

  • Every perk, credit or balance in an answer comes from the USER data files read in that run, and anything stale (>90 days) or marked UNVERIFIED is flagged inline instead of stated as fact.
  • Each recommendation names the card, program or credit, its dollar or points value, and the exact next step the principal takes.
  • The data files stay the single source of truth: balances change only on the principal's report or a statement, perks only after a web-verified refresh, credit status only on confirmed usage.
  • Money never moves from this skill: transfers, bookings and activations are planned here. Where a booking skill is installed, it carries out a plan only after the principal's yes on the itemized total; otherwise the principal executes.

Intent Routing

Intent Trigger File
ShowBenefits "what perks do I have", "card benefits", "which card for X" Intents/ShowBenefits.md
UpdatePoints "I have N points", "update my points", "new balance" Intents/UpdatePoints.md
PlanRedemption "plan a trip with points", "use my points for", "what can N points get" Intents/PlanRedemption.md
RefreshPerks "refresh perks", "did the benefits change", "verify card benefits" Intents/RefreshPerks.md
CreditSweep "unused credits", "credits on the table", "expiring credits", "monthly credit check" Intents/CreditSweep.md
File Read when
Setup.md first-time setup of the four data files, with an invented worked example of each and a proof command

Data & Config

This skill is procedure only. All personal financial data (card inventory, balances, credits, cross-card strategy, standing travel preferences) lives in the USER tree at <configRoot>/LIFEOS/USER/CUSTOMIZATIONS/SKILLS/CardBenefits/ and is read by path on every invocation (configRoot is $CLAUDE_CONFIG_DIR when set, else ~/.claude). First-time setup, a worked example of each file and a proof command: Setup.md. When Cards.md is missing, stop and point the principal at Setup.md; never answer perks from model memory.

Read the full file on GitHub · 81 lines

Files

What ships with it

6 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. 10d ago First seen · 81 lines · 137 tokens per session scan A 87708d2f39c2

Subscribe to this mod's changes

CardBenefits is a skill published in the GitHub repository danielmiessler/LifeOS (19,717 stars, last pushed yesterday), licensed MIT. It adds 137 tokens to every session and 1,420 once invoked, about $0.0005 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 2026-10-28.

Related

CardBenefits compared with skills from other repositories

CardBenefits next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
CardBenefitsdanielmiessler/LifeOSSkill20kyesterdayMITA137Claude Code, Codex
company-cfocoreyhaines31/makerskillsSkill890yesterdayMITA202Claude Code
personal-cfocoreyhaines31/makerskillsSkill890yesterdayMITA209Claude Code
kyc-escalationmohitagw15856/pm-claude-skillsSkill1.5kyesterdayMITA93Claude Code
ai-roi-auditmohitagw15856/pm-claude-skillsSkill1.5kyesterdayMITA118Claude Code
credit-memomohitagw15856/pm-claude-skillsSkill1.5kyesterdayMITA83Claude Code
loan-covenant-reviewmohitagw15856/pm-claude-skillsSkill1.5kyesterdayMITA95Claude Code