Agent skill

Hidden Fee Auditor

by mohitagw15856 in mohitagw15856/pm-claude-skills

Scan a bill, contract, or quote for junk and hidden fees — the padding buried in the fine print — and get them questioned or removed.

MITAuto-check passed

Install Hidden Fee Auditor

skills CLI
$ npx skills add mohitagw15856/pm-claude-skills --skill hidden-fee-auditor -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mohitagw15856/pm-claude-skills hidden-fee-auditor --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mohitagw15856/pm-claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/hidden-fee-auditor .claude/skills/hidden-fee-auditor && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
hidden-fee-auditor
GitHub stars
1.4k
Token cost
~1k tokens
SKILL.md length
483 words
Files
1
Skills in repo
1,348
Repo updated
First seen
Licence
MIT

At a glance

Scan a bill, contract, or quote for junk and hidden fees — the padding buried in the fine print — and get them questioned or removed.

  • Works in 5 steps: Itemize and classify. Go charge by… → Know the usual suspects.… → Make them explain it. "What exactly is… → …
  • Asked to check this bill for hidden fees
  • SKILL.md covers What This Skill Produces, Required Inputs, Framework: Read Every Line,… and Output Format, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Hidden Fee Auditor is an agent skill from mohitagw15856/pm-claude-skills. Scan a bill, contract, or quote for junk and hidden fees — the padding buried in the fine print — and get them questioned or removed. Use when asked to check this bill for hidden fees, are these charges legit, what am I actually paying for, or review this quote for junk fees. Produces a line-by-line read flagging suspicious/vague/padded charges, which are commonly negotiable or bogus, the questions to ask and script to dispute them, and an estimate of what you could save — across bills like telecom, hotels, cars…

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: 1255 professional Agent Skills for Claude, ChatGPT, Gemini, Cursor & Codex — PRDs, postmortems, leases, medical bills, layoffs, go-bags, new countries. Plain markdown, MIT, in… The licence is MIT.

When your agent uses it

  • Asked to check this bill for hidden fees
  • Are these charges legit
  • What am I actually paying for
  • Review this quote for junk fees

Example prompts

  • “/hidden-fee-auditor”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Itemize and classify. Go charge by charge — a clear service you agreed to is fine; a vague or unexplained line is a target.
  2. Know the usual suspects. "Administrative," "processing," "convenience," "resort," "documentation," and "regulatory recovery" fees are…
  3. Make them explain it. "What exactly is this charge for, and is it mandatory or can it be removed?" forces justification — many evaporate…
  4. Separate real taxes from fake ones. Genuine government taxes aren't negotiable; company-invented "fees" dressed up to look official often…
  5. Challenge before you sign. On a quote, negotiate or strike junk fees pre-commitment — far easier than after you've paid.

What it can do on your machine

Read from SKILL.md and the folder at commit 1cbf1f0. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Hidden Fee Auditor loads about 1k tokens when it runs. Until then it costs about 140 tokens; SKILL.md has 483 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~140
When it runs · the whole SKILL.md, loaded when a task matches
~1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mohitagw15856/pm-claude-skills at commit 1cbf1f0, republished under its MIT licence (© mohitagw15856). 483 words, ~1,041 tokens.

Download SKILL.mdSave it as .claude/skills/hidden-fee-auditor/SKILL.md (or your agent's skills folder).
name
hidden-fee-auditor
description
Scan a bill, contract, or quote for junk and hidden fees — the padding buried in the fine print — and get them questioned or removed. Use when asked to check this bill for hidden fees, are these charges legit, what am I actually paying for, or review this quote for junk fees. Produces a line-by-line read flagging suspicious/vague/padded charges, which are commonly negotiable or bogus, the questions to ask and script to dispute them, and an estimate of what you could save — across bills like telecom, hotels, cars, banking, and services.

Hidden-Fee Auditor

Companies pad bills and quotes with vague line items betting you won't question them — "administrative fee," "resort fee," "processing," "documentation." Most people never read closely enough to push back. This audits the charges line by line, flags what's junk or negotiable, and hands you the exact questions to get them explained, reduced, or removed.

What This Skill Produces

  • A line-by-line read — each charge classified: legitimate, vague/questionable, or commonly-junk padding
  • The suspicious ones — fees that are frequently bogus or negotiable (admin/processing/resort/doc/convenience fees)
  • The questions & dispute script — what to ask to force an explanation, and how to request removal or a reduction
  • A savings estimate — roughly what's contestable
  • A pre-commit check — for a quote/contract, what to challenge before you sign

Required Inputs

Ask for these if not provided:

  • The document — the bill, quote, or contract (paste the line items/charges)
  • The type — telecom, hotel, car purchase/rental, bank, utility, event tickets, services
  • Stage — already billed, or a quote before you commit
  • Context — what you expected to pay / were quoted
  • Goal — understand the charges, dispute them, or negotiate before signing

Framework: Read Every Line, Question The Vague

  1. Itemize and classify. Go charge by charge — a clear service you agreed to is fine; a vague or unexplained line is a target.
  2. Know the usual suspects. "Administrative," "processing," "convenience," "resort," "documentation," and "regulatory recovery" fees are often padding or negotiable, not true pass-through costs.
  3. Make them explain it. "What exactly is this charge for, and is it mandatory or can it be removed?" forces justification — many evaporate under a direct question.
  4. Separate real taxes from fake ones. Genuine government taxes aren't negotiable; company-invented "fees" dressed up to look official often are.
  5. Challenge before you sign. On a quote, negotiate or strike junk fees pre-commitment — far easier than after you've paid.
Show full SKILL.md (183 more words)Show less

Output Format

Fee audit: [bill/quote type] · expected ~[amount]
Line itemAmountRead
[charge][x]✅ legit / ⚠️ vague — ask / 🚩 commonly junk/negotiable

Question these: [the flagged charges + why]. Ask / dispute: "[what is this for — mandatory or removable?]" → request removal/reduction. Likely contestable: ~[estimate]. Before you sign (if a quote): [strike/negotiate these first].

Quality Checks

  • Every charge is classified (legit / questionable / junk)
  • Flags the common padding fees specifically
  • Distinguishes real taxes from invented "fees"
  • Gives concrete questions and a dispute/negotiate script
  • Estimates what's contestable
  • For quotes, advises challenging before signing

Anti-Patterns

  • Assuming every line is mandatory and paying without question.
  • Confusing invented fees with real taxes.
  • Vague "this seems high" with no specific line flagged.
  • Only auditing after paying when it's a quote you could still negotiate.
  • Overpromising that everything is removable.

Example Trigger Phrases

  • "Check my phone bill for hidden fees."
  • "The hotel added a resort fee and a bunch of charges — are these legit?"
  • "Review this car-purchase quote for junk fees before I sign."
  • "What are all these fees on my bill actually for?"
  • "My internet bill has charges I don't recognize — what can I dispute?"

© mohitagw15856, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/hidden-fee-auditor of mohitagw15856/pm-claude-skills.

Open the folder on GitHubat commit 1cbf1f0

Compare with similar skills

Hidden Fee Auditor next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Hidden Fee Auditor compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Hidden Fee Auditor this skillmohitagw15856/pm-claude-skills1.4k—~1kAutomated safety check: PassMIT
Scanwshobson/agents40k—~2.2kAutomated safety check: PassMIT
Repo Scanaffaan-m/ECC276k—~1.5kAutomated safety check: PassMIT
Repo Scanaffaan-m/ECC276k—~1.3kAutomated safety check: PassMIT
Billing Automationwshobson/agents40k13 repos~473Automated safety check: PassMIT
Vulnerability Scanningsickn33/agentic-awesome-skills47k1 repos~2.8kAutomated safety check: PassMIT

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Questions about Hidden Fee Auditor

What does Hidden Fee Auditor do?

Scan a bill, contract, or quote for junk and hidden fees — the padding buried in the fine print — and get them questioned or removed. Hidden Fee Auditor is an agent skill from mohitagw15856/pm-claude-skills. Scan a bill, contract, or quote for junk and hidden fees — the padding buried in the fine print — and get them questioned or removed.

When should I use Hidden Fee Auditor?

Hidden Fee Auditor fits situations like: asked to check this bill for hidden fees; are these charges legit; what am I actually paying for; review this quote for junk fees.

How do I install Hidden Fee Auditor in Claude Code?

Run `npx skills add mohitagw15856/pm-claude-skills --skill hidden-fee-auditor -a claude-code`. Or copy the skill folder (skills/hidden-fee-auditor in mohitagw15856/pm-claude-skills) into .claude/skills/hidden-fee-auditor in your project. Claude Code loads it when a task matches its description.

How do I install Hidden Fee Auditor in Codex?

Run `npx skills add mohitagw15856/pm-claude-skills --skill hidden-fee-auditor -a codex`. Or copy the skill folder (skills/hidden-fee-auditor in mohitagw15856/pm-claude-skills) into .agents/skills/hidden-fee-auditor in your project. Codex loads it when a task matches its description.

Can I use Hidden Fee Auditor in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitagw15856/pm-claude-skills --skill hidden-fee-auditor -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hidden-fee-auditor, .gemini/skills/hidden-fee-auditor, .github/skills/hidden-fee-auditor and .opencode/skills/hidden-fee-auditor in your project.

What does Hidden Fee Auditor need to run?

SKILL.md names no scripts, command-line tools or credentials: Hidden Fee Auditor is instructions for the agent only.

Does Hidden Fee Auditor access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Hidden Fee Auditor safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Hidden Fee Auditor use?

Hidden Fee Auditor is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Hidden Fee Auditor use?

About 1k tokens (SKILL.md is roughly 4.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Hidden Fee Auditor?

Skills that share tags, products or a category with Hidden Fee Auditor: Scan (wshobson/agents, 40k stars), Repo Scan (affaan-m/ECC, 276k stars), Repo Scan (affaan-m/ECC, 276k stars) and Billing Automation (wshobson/agents, 40k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Hidden Fee Auditor?

mohitagw15856 (a GitHub user) maintains it in mohitagw15856/pm-claude-skills, which has 1,434 GitHub stars. The repository holds 1,348 skills in this directory. The repository was last updated on October 9, 2026.

Source: mohitagw15856/pm-claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.