Ledger
A deterministic double-entry accounting core. Every transaction balances; the math is never an AI guess.
In the constellation
Ledger highlighted in the live map — hover or tap any node to explore.
Why it exists
Every product that touches money needs the same thing underneath: a place where every transaction balances and nothing is ever a guess. Most teams either re-implement accounting in each app — and quietly get it wrong — or hand the books to a black box they can’t audit.
Money math has to be exactly right, every time. That is not a job for a language model.
What Ledger is
Ledger is a deterministic double-entry accounting core: accounts, postings, balances, reconciliation, and period close — computed mechanically, append-only, with a total audit trail.
The AI above it — categorizing a charge, spotting an anomaly, drafting an invoice — only ever proposes. Ledger commits through a contract that cannot produce an unbalanced book.
What it does
Double-entry integrity
Every transaction balances or it doesn’t post. Entries are append-only and immutable; the audit trail is total.
Balances & rollups
Point-in-time balances, P&L, cash-flow, and period close — derived, never hand-maintained.
Reconciliation
Match external statements against internal postings and surface the breaks for review.
Sub-ledgers
Per-relationship, per-circle, or per-project books — the same core, partitioned cleanly.
The line between judgment and machinery
AccelMars draws one hard line through every product: what an AI decides, and what runs deterministically. Ledger sits on the boundary — and keeps the two honest.
What the app’s AI proposes
- Transaction categorization
- Anomaly and fraud flags
- Invoice drafting & plain-language queries
What Ledger guarantees
- Balanced double-entry postings
- Immutable audit trail
- Reconciliation matching & period close
This is the AccelMars cleavage at its sharpest: the AI never writes a number to the books — it proposes, and the deterministic core commits.
Planned — a second-ring engine. Designed and specced, not yet built. It will power Abacus and the Bond finance line.
Open-core, like Anchor and Booster — the mechanical engine in the open.