swaitsandClaude Opus 5.5
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The owner's viewer at 1479x519 (scale 1) showed Overview through half of
Accounts above the status card; Assets, Parties, Projects, Documents,
Company and Journal sat in a scroll area with no sign that it scrolled,
so the links seemed to go behind the status box.
The sidebar now gives way in steps, each only when the one before is not
enough, so a window where everything fit looks exactly as it did
(pixel-checked against main at 1440x920, tests/goldens):
1. The status card folds to its one summary line, "● Live · event 559 ·
✓ verified". Hovering it shows the three checks; right-click keeps the
card's copy menu. The line is the fullest wording that fits the card
(summaries), never cut off: a failed check is named ("⊘ Database
differs", "⊘ 2 files damaged") before the event and the word "Live"
are kept, and only then shortened to a count. Whatever the line
leaves out, its tooltip says.
2. The rows tighten: the footer's menus, the gap under the header, the
spacing between links, then the rows' height, down to 24 points, in
the same font. The rail tightens the same way, also to 24 points.
3. Only then do the links scroll, with a soft fade and a chevron at each
clipped edge (the rail's chevron sits centred on its own pill, clear
of the icons), and the current page's link is scrolled into view
whenever the page changes.
Links that overrun their room by under half a pixel count as fitting, so
the card folds where main's links began to lose a visible sliver, not a
point sooner at fractional scales.
At 1479x519 and scale 1 all twelve links show unscrolled in the sidebar,
and at 900x519 in the rail, in every footer state (Live, Snapshot, each
database state, damaged files, no Books menu).
Tests (tests/sidenav.rs, fixture books with a footer like the live one):
every height from 300 to 920 px at scales 1, 1.25, 1.5 and 2, sidebar and
rail, for each footer state: no link under the footer, links cut off only
when they scroll, and nothing scrolls from 519 px up at scale 1; the
owner's window in sidebar and rail; the folded line fits its card and
names a failed check, its tooltip the three checks; the scroll cue and
scrolling to the current link; the tall sidebar unchanged. Unit tests for
fit, its order of steps, the footer's memo and the folded line's
wordings.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T3gXMVt7XJPi6ens1or9Dj
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, the statement of cash flows (direct method, with the reconciliation and noncash schedules), 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. 64 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.ledger-config— the company settings in a books dir'swanderbooks.toml.ledger-gui— the viewer: a read-only, live window on the books for owners and their accountant (egui). Answers first (cash, runway, profit, what needs attention), then every number drills down to its lines, its entry, the rendered receipt, and the journal history. Follows the journal live: a change the agent makes appears in milliseconds.--demoopens a realistic demo company.
Verification
This is the storytold way applied to accounting: agents verify against oracles, never ship what they haven't demonstrated.
- 190+ workspace tests: invariant tests encoding accounting law, golden-file report snapshots, property tests (proptest), end-to-end MCP stdio tests.
- Formal proofs of the accounting laws (
just prove,docs/verification.md). Kani model-checks the engine's arithmetic kernel exhaustively within bounds. Lean 4 proves that, after any sequence of commands, the trial balance balances, the accounting equation holds, posted entries are forever, closed periods stay frozen, and a close moves exactly the net income to equity. The first pass found three engine bugs that every test, fuzzer, and mutant had missed: negative amounts accepted, and two crashes on oversized amounts. It also caught a soundness bug in the model checker itself. - Mutation testing via cargo-mutants; fuzzing via cargo-fuzz (11.5M+ executions, zero crashes).
- GnuCash is a behavioral cross-check, never the authority and never a code source (clean room, MIT OR Apache-2.0). Accounting principles, proved, are the spec. Where any other program disagrees, we work out from principles who is right.
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-mcp -- --data-dir /tmp/books # MCP server over stdio
cargo run -p ledger-gui -- --demo # the viewer, on a demo company
New books, one command (installs Rust and wanderbooks if needed, makes the
books' private folder, starts books called acme and lets Claude Code reach
them; nothing needs sudo):
curl -fsSL https://wanderbooks.ai/install.sh | sh -s -- acme
Already installed, three commands: wanderbooks setup, wanderbooks books create acme, wanderbooks connect claude --book acme (or connect codex).
Then talk to the agent; wanderbooks gui acme shows the books, and its
Books menu backs them up, restores, starts new books and closes them.
Developing
Every tool the recipes use (Rust, just, Kani, Lean, cargo-mutants,
cargo-fuzz, Node for deploys) is pinned in mise.toml:
mise install
just # lists the recipes: check, build, prove, demo, ...
Layout
crates/ledger-core/ # engine: money, accounts, journal, ledger, reports
crates/ledger-store/ # journal + SQLite projection + blob store
crates/ledger-mcp/ # MCP server: 119 tools, resources, handbook, receipt policy
crates/ledger-import/ # QBO CSV import, IIF/XLSX export
crates/ledger-config/ # wanderbooks.toml company settings
crates/ledger-cli/ # `wanderbooks`: the one executable (every mode)
crates/ledger-host/ # the host, the agents' bridge, the owner's commands
crates/ledger-package/ # The CPA package and the 1099 worksheet (server and viewer)
crates/ledger-gui/ # the viewer: read-only, live (egui)
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.