swaitsandClaude Opus 5.5
b292a505b1
check / check (push) Canceled after 0s
Settings, conventions (posting templates, approval rules, policies, close steps, calendar, mappings, notes), decisions, open items and entry approvals are journal events (journal format 2). Books that keep their settings never read wanderbooks.toml or config.json; the server and the viewer take the vault key from --vault-key-file instead. books.import_settings moves a settings file in once, exactly as the server reads it. Approval rules, when enforced, gate every posting path. Replay refuses what it can't read as newer, never as corrupt. Lean: a record changes no figure. Mutation on the whole diff: every survivor killed by a test but two equivalent (docs/testing.md). The Company page says a late open item is overdue in words, not colour alone. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01T3gXMVt7XJPi6ens1or9Dj
113 lines
4.9 KiB
Markdown
113 lines
4.9 KiB
Markdown
# wanderbooks
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Canonical double-entry bookkeeping, rebuilt from scratch. The engine is
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verified against oracles, parity is tracked automatically, and the primary
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interface is AI-first: you talk to an agent, the agent drives the books
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through MCP. Self-hosted, no rent.
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## What it is
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- **`ledger-core`** — the semantics engine. Exact decimal money, five
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account types, balanced journal entries, immutable posted log with
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reversing entries, trial balance, P&L, balance sheet, indirect-method
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cash flow, fixed-asset register with straight-line depreciation.
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- **`ledger-store`** — durable storage. The source of truth is an
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append-only, hash-chained JSONL journal; SQLite is a disposable
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projection rebuilt from it; receipts live in a content-addressed blob
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store. Drafts are durable, corrupt projections self-heal.
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- **`ledger-mcp`** — the AI-first interface. 64 MCP tools over stdio or
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Streamable HTTP: draft → preview → post workflow, server-side receipt
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policy (>$25), anti-splitting detection, asset management, digest for
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human review, plus read-only resources for dashboards.
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- **`ledger-import`** — QuickBooks interop. Import bank/credit-card CSVs
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and chart-of-accounts CSVs; export IIF journal entries (for QuickBooks
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Desktop) and XLSX reports.
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- **`ledger-config`** — the company settings in a books dir's
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`wanderbooks.toml`.
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- **`ledger-gui`** — the viewer: a read-only, live window on the books for owners and their
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accountant (egui). Answers first (cash, runway, profit, what needs
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attention), then every number drills down to its lines, its entry, the
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rendered receipt, and the journal history. Follows the journal live:
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a change the agent makes appears in milliseconds. `--demo` opens a
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realistic demo company.
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## Verification
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This is the storytold way applied to accounting: agents verify against
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oracles, never ship what they haven't demonstrated.
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- 190+ workspace tests: invariant tests encoding accounting law, golden-file
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report snapshots, property tests (proptest), end-to-end MCP stdio tests.
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- **Formal proofs of the accounting laws** (`just prove`,
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`docs/verification.md`). Kani model-checks the engine's arithmetic
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kernel exhaustively within bounds. Lean 4 proves that, after any
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sequence of commands, the trial balance balances, the accounting
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equation holds, posted entries are forever, closed periods stay
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frozen, and a close moves exactly the net income to equity. The first
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pass found three engine bugs that every test, fuzzer, and mutant had
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missed: negative amounts accepted, and two crashes on oversized
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amounts. It also caught a soundness bug in the model checker itself.
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- Mutation testing via cargo-mutants; fuzzing via cargo-fuzz (11.5M+
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executions, zero crashes).
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- GnuCash is *a* behavioral cross-check, never the authority and never
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a code source (clean room, MIT OR Apache-2.0). Accounting principles,
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proved, are the spec. Where any other program disagrees, we work out
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from principles who is right.
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## Status
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Parity is 12 of 12 against the spreadsheet workflow it replaces
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(`docs/capability-parity.md`). The parallel-run plan
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(`docs/parallel-run.md`) is written; the Google Sheet stays the system of
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record until a clean month and explicit cutover approval.
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See [`plan/STATUS.md`](plan/STATUS.md) for where things stand and
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[`plan/roadmap.md`](plan/roadmap.md) for where it's going.
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## Quickstart
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```bash
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cargo test # whole suite
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cargo run -p ledger-mcp -- --data-dir /tmp/books # MCP server over stdio
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cargo run -p ledger-gui -- --demo # the viewer, on a demo company
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```
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New books, one command (installs Rust and wanderbooks if needed, makes the
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books dir with the MCP server registered for it, and starts the agent):
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```bash
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curl -fsSL https://wanderbooks.ai/install.sh | sh -s -- ~/Books/Acme
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```
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Already installed: `wanderbooks new ~/Books/Acme` (add `--codex` to keep the
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books with Codex instead of Claude Code). In a books dir, `just`
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lists the shortcuts (`just gui`, `just agent`, `just backup`).
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## Developing
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Every tool the recipes use (Rust, just, Kani, Lean, cargo-mutants,
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cargo-fuzz, Node for deploys) is pinned in `mise.toml`:
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```sh
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mise install
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just # lists the recipes: check, build, prove, demo, ...
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```
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## Layout
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```
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crates/ledger-core/ # engine: money, accounts, journal, ledger, reports
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crates/ledger-store/ # journal + SQLite projection + blob store
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crates/ledger-mcp/ # MCP server: 108 tools, resources, handbook, receipt policy
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crates/ledger-import/ # QBO CSV import, IIF/XLSX export
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crates/ledger-config/ # wanderbooks.toml company settings
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crates/ledger-cli/ # `wanderbooks new`: one-command books dir + agent
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crates/ledger-gui/ # the viewer: read-only, live (egui)
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docs/ # requirements, architecture, oracle, parity, glossary
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plan/ # STATUS.md, roadmap.md
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AGENTS.md # operating manual for agents working here
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```
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## License
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MIT OR Apache-2.0. See `LICENSE-MIT` and `LICENSE-APACHE`.
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