Personal finance
Open source
Kosh
A self-hosted ledger for accounts, CSV imports, budgets, bills, goals, reports, and recurring transactions, built around money correctness, ownership checks, and recoverable operations.
Role
Creator · Full-stack engineering
Status
Open source
Stack
Links
137
Passing tests
Integer
Minor-unit money
AES-256-GCM
Column encryption
Scope
A complete ledger, not a transaction demo
Kosh covers accounts, CSV imports, budgets, bills, goals, reports, and recurring transactions. The codebase separates domain logic, Drizzle/PostgreSQL persistence, and the Next.js application in a Turborepo.
Correctness
Money and ownership rules live close to the data
Money is stored in integer minor units. Transaction-sign constraints, ownership checks, and partial unique indexes protect ledger invariants and detect duplicate imports while respecting soft deletes.
Security and operations
Self-hosting includes recovery, migration, and access control
Sensitive columns use AES-256-GCM encryption. Read-only MCP tokens are scoped and stored as hashes, pg-boss runs background jobs, and the repository includes backup, restore, and migration-verification tooling. The test suite has 137 passing tests.
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