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@blogmcp/nav-core

v0.2.1

Published

Framework-agnostic navigation tree core — types, validation, traversal, and immutable mutations for the KB information-architecture (menu) layer. Zero framework dependencies; consumed by the API service, MCP tools, and the blog SDK.

Vulnerabilities

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Links

Maintainers

huararangahuararanga

Keywords

navigationmenutreeinformation-architectureblog

Readme

@blogmcp/nav-core

Framework-agnostic core for the KB navigation (menu) tree. Pure TypeScript — no I/O, no framework. The design lives in competitor-monitor/docs/internal/navigation-model.md.

This package is the shared logic surfaced two ways: the SDK runs it in-memory over a cached tree, and the server exposes it as MCP/API tools. Mirrors the @blogmcp/mdx-schema → renderer split.

Modules

| Import | Contents | |---|---| | @blogmcp/nav-core | everything (barrel) | | @blogmcp/nav-core/types | node model: NavNode union, NavTree, FlatNode, LocalizedNode | | @blogmcp/nav-core/validate | validate(tree, opts) / assertValid — cycles, depth, dangling refs, single-owner, data-bag caps | | @blogmcp/nav-core/traverse | findNode, breadcrumbs, getSiblings, getNextPrev, getSubtree, flatten (FLAT), localize, prune, sortTree | | @blogmcp/nav-core/mutate | insertNode, removeNode, moveNode, reorderChildren — immutable; throw NavMutationError |

Invariants

  • Immutable: traversal and mutation never edit inputs; mutations return new trees.
  • Server-authoritative: the API re-runs validate() after every mutation.
  • Opaque data: the data bag is never interpreted, only size/depth-capped.
  • Single multilingual tree: labels is a per-locale map; localize() resolves to one locale with fallback + an optional labelResolver (article titles come from the consumer — nav-core does not know article content).

Not here yet

The content→default-tree auto-builder and the auto-build ⊕ overrides merge ship with the API service slice (they need the article content index and the auto-append policy — see navigation-model.md §9).

Scripts

npm test --workspace=@blogmcp/nav-core        # vitest
npm run build --workspace=@blogmcp/nav-core   # tsc → dist