swaitsandClaude Opus 5.5
8164abb2b8
The close zeroed every revenue and expense account's all-time movement, so closing a period after later entries were posted swept those too: close January in March and February's and March's income landed in January's closing entry. The preview had the same bug and never showed where the net went. Now: - close_period_to(id, to) zeroes balances as of the period end; entries dated later stay open for their own period. Periods must close in order (LedgerError::CloseOutOfOrder): a later close has already swept the earlier period. - CloseTo::Members: for a partnership (multi-member LLC) the net goes to each member's capital account by share, to the cent, the last member absorbing rounding, which is what K-1 capital accounts track. CloseTo::RetainedEarnings (3999) stays the default; close_period is shorthand for it. books.close_period picks Members when wanderbooks.toml lists members. - The journal records the close target; replay re-derives the closing entry and now compares every line with the journal, not just the id, so a change to closing math can never silently rewrite history. - The tool's preview is the real close run on a clone of the ledger (Ledger now derives Clone), so preview and post can't disagree. - Members' equity: closing entries into a capital account are income, not contributions. Balance sheet for a partnership: capital accounts (with allocated earnings), then only unallocated earnings — "Undistributed earnings, prior years" if any, and this year's unclosed net income (loss). periods::allocate is shared by the close and the statement. Tests: January closed after February is posted sweeps exactly Dr 4000 2,500 / Cr 6100 800 / Cr 3999 1,700 (mutation-checked: the old code gives 3,500/120/800/2,580); out-of-order close refused; a partnership close splits 666.67 into 333.34/333.33 with no 3999, and the members' equity statement reads correctly before and after; store replay of a members close (reopen, rebuild, verify); partnership and corporate balance sheet layouts; stdio close preview equals the posted lines. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MtYEaR6M6Ybdhm6X98BWNu
wanderbooks
Canonical double-entry bookkeeping, rebuilt from scratch. The engine is verified against oracles, parity is tracked automatically, and the primary interface is AI-first: you talk to an agent, the agent drives the books through MCP. Self-hosted, no rent.
What it is
ledger-core— the semantics engine. Exact decimal money, five account types, balanced journal entries, immutable posted log with reversing entries, trial balance, P&L, balance sheet, indirect-method cash flow, fixed-asset register with straight-line depreciation.ledger-store— durable storage. The source of truth is an append-only, hash-chained JSONL journal; SQLite is a disposable projection rebuilt from it; receipts live in a content-addressed blob store. Drafts are durable, corrupt projections self-heal.ledger-mcp— the AI-first interface. 27 MCP tools over stdio or Streamable HTTP: draft → preview → post workflow, server-side receipt policy (>$25), anti-splitting detection, asset management, digest for human review, plus read-only resources for dashboards.ledger-import— QuickBooks interop. Import bank/credit-card CSVs and chart-of-accounts CSVs; export IIF journal entries (for QuickBooks Desktop) and XLSX reports.
Verification
This is the storytold way applied to accounting: agents verify against oracles, never ship what they haven't demonstrated.
- 70 workspace tests: invariant tests encoding accounting law, golden-file report snapshots, property tests (proptest), end-to-end MCP stdio tests.
- Mutation testing via cargo-mutants; fuzzing via cargo-fuzz (11.5M+ executions, zero crashes).
- GnuCash is the behavioral oracle (never a code source — clean room, MIT OR Apache-2.0).
Status
Parity is 12 of 12 against the spreadsheet workflow it replaces
(docs/capability-parity.md). The parallel-run plan
(docs/parallel-run.md) is written; the Google Sheet stays the system of
record until a clean month and explicit cutover approval.
See plan/STATUS.md for where things stand and
plan/roadmap.md for where it's going.
Quickstart
cargo test # whole suite
cargo run -p ledger-cli -- init ~/books/acme # scaffold a books dir: mise.toml + AGENT.md
cargo run -p ledger-mcp -- --data-dir /tmp/books # MCP server over stdio
Then cd ~/books/acme: mise trust && mise install, mise run build,
mise run mcp-add, and start claude — the agent onboards from AGENT.md.
Layout
crates/ledger-core/ # engine: money, accounts, journal, ledger, reports
crates/ledger-store/ # journal + SQLite projection + blob store
crates/ledger-mcp/ # MCP server: 27 tools, resources, receipt policy
crates/ledger-import/ # QBO CSV import, IIF/XLSX export
docs/ # requirements, architecture, oracle, parity, glossary
plan/ # STATUS.md, roadmap.md
AGENTS.md # operating manual for agents working here
License
MIT OR Apache-2.0. See LICENSE-MIT and LICENSE-APACHE.