osakassopimus

osakassopimus is a skill for Claude Code, Codex from akunikkola/claude-for-legal-finland. It costs 198 tokens per session (1,920 once invoked), scanned A, original, MIT.

A Finnish shareholder-agreement guide for drafting and reviewing arrangements between company owners. A shareholder agreement is a private contract that sets rules for cooperation, decision-making, and transfers of shares.

In plain words
What is it for?
It helps draft or check rules on voting, board seats, share transfers, pre-emption, drag-along and tag-along rights, vesting, and other shareholder arrangements.
Why use it?
It helps reveal whether an intended rule belongs in a shareholder agreement, the company’s articles, or the law. It also makes ownership conflicts and transfer restrictions easier to structure and review.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions CLAUDE.md.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is perusteet: `../yhtion-hallinto/references/yhtiooikeus-perusteet.md`..

Part of the yhtiooikeus plugin — 3 skills, 1 agent shipped together

Good fit It helps draft or check rules on voting, board seats, share transfers, pre-emption, drag-along and tag-along rights, vesting, and other shareholder arrangements.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/akunikkola/claude-for-legal-finland
agentmods
npx agentmods add skills/akunikkola/claude-for-legal-finland/osakassopimus

Made for: Claude Code, Codex.

Or install yhtiooikeus, the plugin that ships this one along with the rest of its 3 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 osakassopimus

README.md
[![agentmods](https://agentmods.dev/badge/skills/akunikkola/claude-for-legal-finland/osakassopimus/github.svg)](https://agentmods.dev/skills/akunikkola/claude-for-legal-finland/osakassopimus)
Your own site
<a href="https://agentmods.dev/skills/akunikkola/claude-for-legal-finland/osakassopimus"><img src="https://agentmods.dev/badge/skills/akunikkola/claude-for-legal-finland/osakassopimus/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 osakassopimus

Your own site · 80×15
<a href="https://agentmods.dev/skills/akunikkola/claude-for-legal-finland/osakassopimus"><img src="https://agentmods.dev/badge/skills/akunikkola/claude-for-legal-finland/osakassopimus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 198 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,920 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 $0.00198 $0.01920
Opus 5 $0.00099 $0.00960
Sonnet 5 $0.00040 $0.00384
Haiku 4.5 $0.00020 $0.00192

Measured 9d ago against content hash 7fbc06ed8539, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

osakassopimus 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.

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.

yhtiooikeus/skills/osakassopimus/SKILL.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Osakassopimus — laatiminen ja riskitarkistus

Tämä skill laatii ja tarkistaa osakassopimuksia. Osakassopimus on sopimus (OikTL 228/1929) osakkaiden välillä — se täydentää osakeyhtiölakia (624/2006) ja yhtiöjärjestystä, mutta sitoo vain osapuoliaan.

Vastuuvapaus: luonnokset ja riskiarviot ovat tarkistettavia — ei oikeudellista neuvontaa. Katso yhtiooikeus/CLAUDE.md. Yhtiöoikeuden perusteet: ../yhtion-hallinto/references/yhtiooikeus-perusteet.md. Yleinen sopimusmekaniikka ja lausekekirjasto: sopimukset-plugari.

Kolme instrumenttia — pidä työnjako kirkkaana

Instrumentti Sitoo Täytäntöönpano
Osakeyhtiölaki kaikkia pakottava ydin: velkojiensuoja, yhdenvertaisuus, vähemmistönsuoja
Yhtiöjärjestys yhtiötä, toimielimiä, kaikkia osakkaita yhtiöoikeudellinen: päätöksen moite, rekisteröinti
Osakassopimus vain sopimusosapuolia sopimusoikeudellinen: sopimussakko, vahingonkorvaus, välimiesmenettely

Tarkista aina: onko määräys oikeassa instrumentissa? Esimerkiksi lunastus- ja suostumuslauseke saa yhtiöoikeudellisen tehon vain yhtiöjärjestyksessä (OYL 3 luku); sopimusperusteinen etuosto sitoo vain sopijoita. Uusi osakas ei ole sopimuksen osapuoli ilman liittymissitoumusta (adherence) — varmista mekanismi.

Laatiminen — käy ainakin nämä läpi

  1. Osapuolet ja tarkoitus — ketkä sitoutuvat (myös yhtiö itse?), suhde mahdollisiin aiempiin sopimuksiin.
  2. Päätöksenteko — hallituksen kokoonpano ja nimitysoikeudet, määräenemmistöä tai kaikkien suostumusta vaativat asiat (reserved matters) — älä tee listasta niin laajaa, että se halvaannuttaa yhtiön.
  3. Osakkeiden vaihdanta — luovutusrajoitukset, etuosto-oikeus, suostumusvaatimus, drag along (enemmistö voi pakottaa myyntiin) ja tag along (vähemmistö pääsee mukaan kauppaan); hinnan määritysmekanismi ja arvonmääritys riitatilanteessa.
  4. Sitouttaminen — vesting-aikataulu, good leaver / bad leaver -ehdot ja lunastushinta kummassakin; työsuhteen ja osakkuuden kytkös (huom. työoikeuden pakottavuus → tyooikeus).
  5. Kilpailukielto ja salassapito — kesto, maantiede, ala; kohtuullisuus (OikTL 36 §) ja suhde liikesalaisuuslakiin.
  6. Rahoitus ja omistuksen muutokset — uudet kierrokset, dilutio, mahdolliset etuoikeudet (huom. yhdenvertaisuus ja osakesarjat yhtiöjärjestyksessä).
  7. Osinkopolitiikka — tavoitteet sopimukseen; sitova jako tehdään silti OYL 13 luvun kaksoistestin rajoissa.
  8. Deadlock — umpikujamekanismi (eskalointi, lunastusmenettelyt kuten shotgun-lauseke) — puuttuva deadlock-ehto on 50/50-yhtiön suurin riski.
  9. Sopimuksen elinkaari — voimassaolo, päättyminen exitissä, muuttaminen, liittymissitoumus, kokonaissopimusehto.
  10. Rikkomusseuraamukset ja riidanratkaisu — sopimussakko (näytön helpotus), vahingonkorvaus, välimiesmenettely (967/1992; luottamuksellisuus) vs. yleinen tuomioistuin.

Read the full file on GitHub · 110 lines

Files

What ships with it

1 file 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 · 110 lines · 198 tokens per session scan A 7fbc06ed8539

Subscribe to this mod's changes

osakassopimus is a skill published in the GitHub repository akunikkola/claude-for-legal-finland (103 stars, last pushed 2mo ago), licensed MIT. It adds 198 tokens to every session and 1,920 once invoked, about $0.0010 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.

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