> ## Documentation Index
> Fetch the complete documentation index at: https://docs.commander.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Core concepts

> The building blocks of Commander Finance—how transactions, accounts, budget lines, merchants, and synced accounts fit together.

Commander Finance organizes your finances around a few core building blocks. Each concept page covers the rules Commander uses to track and display the data behind one block.

* [Transactions](/core-concepts/transactions)—transaction properties, settled vs. pending status, and the entry points into Commander.
* [Recurring transactions](/core-concepts/recurring-transactions)—schedules for standing commitments, how they're detected, and their timing and cost as a monthly equivalent.
* [Accounts](/core-concepts/accounts)—manual and synced accounts, plus balance computation.
* [Budgeting](/core-concepts/budgeting)—budget lines and the three modes that change line behavior.
* [Merchants](/core-concepts/merchants)—recurring-spending groups and automatic budget-line assignment.
* [Synced accounts](/core-concepts/synced-accounts)—Plaid-linked accounts and how they differ from manual ones.


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