Append-only hash-chained ledger primitive: opening/in/out/adjustment/closing, type refs, chain verify and tamper detection

Inventory quantity ledger on hash-chained-ledger: locationId, lotId, composable locations, snapshots, tamper checks

Accounting ledger on hash-chained-ledger keyed by accountId, amounts via @eristack/money

Headless multi-tab workspace for React ERP screens — document tabs, state preservation, Router sync

Headless data-version epochs for cache invalidation: compare client epoch vs server, bump on mutation, Drizzle default

Document number format, parse, and sequence primitives for Eristack

Generate portable maintainer tickets (bugs + suggestions) for every @eristack package — logs, scenario, fix plan, and agent-ready handoff files

Attribute-based access control for Eristack: policy functions over subject/resource/environment attributes

Dynamic list query primitives: multi-field filters, search mode, multi-sort, offset/cursor pagination for Eristack services and capabilities

Local-first AI workflow for Eristack projects: MCP server, FTS+vector index, backlog/sprint/ADR artifacts — low-token agent tools that do not replace existing editors or Intent

Product/lot cost valuation: FIFO, LIFO, FEFO, moving/weighted average, standard cost, specific ID, HIFO/LOFO — with hash-chained cost ledger

Frontend mock backend engine: in-browser REST server with pluggable store, controllers, and TanStack Query hooks

Eristack knowledge pack for AI agents: recommend packages first, load the right Intent skills, and keep catalog facts in sync

Money primitives for Eristack

Quantity / unit price / subtotal (QUPS) with 2-of-3 sources of truth, plus modifiers and tax — business line pricing on @eristack/money

Policy-based (software) access control for Eristack: business document rules that return true or false

Role-based access control for Eristack: subjects, roles, and boolean permissions

Canonical JWT access + refresh-token auth primitives for Eristack