merit-sales-invoices

merit-sales-invoices is a skill for Claude Code from Elnora-AI/elnora-merit-aktiva. It costs 192 tokens per session (3,042 once invoked), scanned C, original, Apache-2.0.

Instructions for managing sales invoices in Merit Aktiva, an Estonian accounting system. They cover creating, finding, correcting, and sending invoices.

In plain words
What is it for?
Use them to issue invoices, create prepayment invoices and credit notes, look up existing invoices, and deliver invoices by email or e-invoice.
Why use it?
They help avoid wrong customer details, invoice numbers, VAT codes, and totals in the accounting records.

Skill for Claude Code

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

Part of the merit-aktiva-workspace plugin — 18 skills, 5 commands, 3 agents, 1 MCP server shipped together

Good fit Use them to issue invoices, create prepayment invoices and credit notes, look up existing invoices, and deliver invoices by email or e-invoice.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/elnora-ai/elnora-merit-aktiva/merit-sales-invoices
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 Elnora-AI/elnora-merit-aktiva --skill merit-sales-invoices
Clone the repo
git clone --depth 1 https://github.com/Elnora-AI/elnora-merit-aktiva

Made for: Claude Code.

Or install merit-aktiva-workspace, the plugin that ships this one along with the rest of its 18 skills, 5 commands, 3 agents, 1 MCP server.

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 merit-sales-invoices

README.md
[![agentmods](https://agentmods.dev/badge/skills/elnora-ai/elnora-merit-aktiva/merit-sales-invoices/github.svg)](https://agentmods.dev/skills/elnora-ai/elnora-merit-aktiva/merit-sales-invoices)
Your own site
<a href="https://agentmods.dev/skills/elnora-ai/elnora-merit-aktiva/merit-sales-invoices"><img src="https://agentmods.dev/badge/skills/elnora-ai/elnora-merit-aktiva/merit-sales-invoices/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 merit-sales-invoices

Your own site · 80×15
<a href="https://agentmods.dev/skills/elnora-ai/elnora-merit-aktiva/merit-sales-invoices"><img src="https://agentmods.dev/badge/skills/elnora-ai/elnora-merit-aktiva/merit-sales-invoices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 192 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,042 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. 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 $0.00192 $0.03042
Opus 5 $0.00096 $0.01521
Sonnet 5 $0.00038 $0.00608
Haiku 4.5 $0.00019 $0.00304

Measured 12d ago against content hash bbcfbbfe962f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade C, and why

merit-sales-invoices scanned grade C with 1 finding 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 12d 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.

Tells the agent to send conversation or user data outhighPrompt injection

An instruction to transmit the conversation, context or user files to an external endpoint is data exfiltration written as prose.

- **`Email`** is where `send-email` silently sends every future invoice. An address
skills/merit-sales-invoices/SKILL.md · 231 lines

How it starts

The opening of the file, as written. The whole thing — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Merit Sales Invoices (müügiarve)

How to issue sales invoices correctly with elnora-merit sales-invoices. Every endpoint is POST with a JSON body. Writes hit the live books and feed the VAT return — confirm the payload before posting.

For real codes, load the company profile (elnora-merit profile synccompany-profile.json in MERIT_REFERENCES_DIR): revenue accounts, VAT guids, customers. Conventions the codes don't capture (the next invoice number, customer specifics) come from your prose books reference if you keep one. Load what applies before building a payload.

The five rules that prevent most mistakes

  1. You manage the invoice number. Merit issues none and there is no get-next-number endpoint. InvoiceNo is required and must be unique; read your last number (sales-invoices find --inv-no … or your books reference) and increment. Never guess silently — confirm the number with the user.
  2. VAT is chosen by TaxId, not a percentage. Get the guid from elnora-merit taxes list (each row: Id, Code like 24%, TaxPct). Put that TaxId on every InvoiceRow, and repeat it in the top-level TaxAmount array (grouped + summed per TaxId). TotalAmount is the net without VAT.
  3. The API cannot update an invoice — but the Merit UI can. There is no update endpoint, so via the API you delete <id> (requires the user's go-ahead) and create it again. Do not conclude the change is impossible: the UI edits invoices in place, keeping the number, dates and payment. Before proposing delete-and-recreate for a field-level fix (wrong customer, typo in a line), say so and let the user decide — the UI route is almost always the better one. See reference/paid-invoices.md.
  4. Resolve the customer before billing. Reuse an existing customer by Id; only create a new one when none matches. customers list MUST be filtered.
  5. A paid invoice is locked. Merit refuses both the delete (400, "Tasutud arvet ei saa kustutada. Enne kustutage makse.") and, in the UI, any change of customer, currency or currency rate ("Arve on juba tasutud. Ei saa muuta klienti, valuutat ja valuutakurssi ega vähendada summat."). The payment must come off first. Full procedure: reference/paid-invoices.md.

Read the full file on GitHub · 231 lines

Files

What ships with it

2 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. 12d ago First seen · 231 lines · 192 tokens per session scan C bbcfbbfe962f

Subscribe to this mod's changes

merit-sales-invoices is a skill published in the GitHub repository Elnora-AI/elnora-merit-aktiva (8 stars, last pushed 5d ago), licensed Apache-2.0. It adds 192 tokens to every session and 3,042 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it C with 1 finding (tells the agent to send conversation or user data out). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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