Open source engineering
Maintained libraries for JavaScript and TypeScript projects, published under the @stackline npm namespace. Search the complete public portfolio, check current npm activity, and go directly to docs or source.
Complete inventory
A maintained SheetJS-compatible spreadsheet parser and writer with security hardening for known prototype pollution and ReDoS advisories.
npm i @stackline/xlsx
Dependency-free PNG chunk extraction with bounded parsing, complete CRC validation and compatibility with the historical callable API.
npm i @stackline/png-chunks-extract
Compatibility-first CommonJS dependency injection with caller anchoring, bounded cache cleanup, first-party types, and no runtime dependencies.
npm i @stackline/proxyquire
Webpack Sass URL rebasing compatible with resolve-url-loader 5.0.0 and backed by recursively maintained loader and source-map dependency chains.
npm i @stackline/resolve-url-loader
A maintained Angular multiselect dropdown with long release-family history, versioned docs, and a focus on compatibility from legacy lines through Angular 21.
npm i @stackline/angular-multiselect-dropdown
Compatibility-first filesystem locks with observable asynchronous cleanup failures and a maintained production dependency.
npm i @stackline/lockfile
Fetch-compatible HTTP backend handler for Stackline AI.
npm i @stackline/ai-server
Compatibility-first filesystem object streams with maintained packaging, first-party types, and a clean Stackline production dependency.
npm i @stackline/fstream
HAR 1.2 validation compatible with har-validator 5.1.5, with browser builds, first-party types, and zero external production dependencies.
npm i @stackline/har-validator
A thin React wrapper for Highcharts with versioned demos, a familiar API, and maintained compatibility across supported Highcharts releases.
npm i @stackline/react-highcharts
Atomic filesystem Writable streams with compatible lifecycle behavior, first-party types, and a maintained Stackline production dependency.
npm i @stackline/fs-write-stream-atomic
Read-only PostgreSQL RAG retrieval with a clean recursively reviewed client and type dependency chain.
npm i @stackline/ai-rag-postgres
Angular wrapper components for Highcharts, Highstock, Highmaps, and related modules, with live docs and migration-aware release families.
npm i @stackline/angular-highcharts
Source-preserving JavaScript token transforms with immutable configs and an exact maintained Esprima dependency chain.
npm i @stackline/redeyed
A maintained Angular data table with sorting, selection, expansion, pagination, and versioned docs aligned to current Angular release families.
npm i @stackline/angular-data-table-component
Compatible JavaScript and JSON terminal highlighting with reliable streams, types, and an exact maintained parser chain.
npm i @stackline/cardinal
Framework-agnostic vanilla JavaScript multiselect dropdown with headless state APIs, skins, object data, body overlays, and accessibility-focused keyboard/ARIA tested behavior.
npm i @stackline/multiselect
Compatibility-first Rollup polyfills for supported Node.js built-ins, with direct node: specifier handling and explicit failures for unsupported browser APIs.
npm i @stackline/rollup-plugin-polyfill-node
Compatibility-first source map and source resolver with maintained packaging, browser builds, and first-party types
npm i @stackline/source-map-resolve
Ollama provider adapter for Stackline AI.
npm i @stackline/ai-ollama
Compatibility-first Browserify build of the modern Ace editor with inline workers
npm i @stackline/brace
Compatibility-first one-shot function wrappers with safe callback decorations and the restored prototype API
npm i @stackline/once
A maintained React 17 multiselect dropdown with controlled state, searchable options, skins, live demos, and ADA-friendly keyboard support.
npm i @stackline/react-multiselect-dropdown
Compatibility-first deep copying with cycle support, safe property writes, zero runtime dependencies, and TypeScript declarations.
npm i @stackline/deep-copy
A maintained Esprima 4 compatible parser with a dependency-free runtime, reproducible ES5 build, first-party types, and clean alias migration.
npm i @stackline/esprima
Maintained PostgreSQL client compatible with pg 8.23.0 and built on an exact recursively reviewed dependency chain.
npm i @stackline/pg
Dependency-free PostgreSQL type parsers that preserve the pg-types 2.2.0 contract with current ESM and TypeScript entry points.
npm i @stackline/pg-types
A lightweight browser error reporting SDK with normalized payloads, sanitization, source context, screenshots, and transport to any developer-defined endpoint.
npm i @stackline/client-errors
Maintained graceful filesystem operations with bounded descriptor retries, first-party types, and zero production dependencies.
npm i @stackline/graceful-fs
Dependency-free, CSP-safe elementwise and aggregate operations for ndarrays with complete historical API compatibility.
npm i @stackline/ndarray-ops
Compatibility-first source-map stack traces for VM, browser, and custom loader integrations
npm i @stackline/source-map-support
Dependency-reviewed TypeScript declarations compatible with @types/pg 8.23.1 and legacy alias installation.
npm i @stackline/types-pg
Complete loader-utils 2.0.4 compatibility with maintained leaf dependencies, security hardening, and verified Webpack 4 and 5 builds.
npm i @stackline/loader-utils
A framework-agnostic loading toolkit with spinners, overlays, skeletons, shimmer loaders, accessibility hooks, and anti-flicker behavior.
npm i @stackline/loading-core
Dependency-clean connection pooling compatible with pg-pool 3.14.0 and backed by a recursively reviewed production closure.
npm i @stackline/pg-pool
Maintained Vue multiselect dropdown with Vue 2 and Vue 3 release lines, accessibility-focused keyboard/ARIA tested behavior, Stackline skins, body overlays, object data, scoped slots, and renderless composables.
npm i @stackline/vue-multiselect-dropdown
Provider-neutral Stackline AI contracts, server core, RAG, memory, and adapter interfaces.
npm i @stackline/ai
Zero-dependency ANSI color wrappers with exact ansicolors compatibility and first-party types
npm i @stackline/ansicolors
Stack-safe deep equality with the proven deep-is 0.1.4 semantics
npm i @stackline/deep-is
A stable framework-agnostic color picker foundation for modern web apps, with an HSV engine, typed API, clean DOM controls, and a compact browser-ready footprint.
npm i @stackline/color
A maintained Moment.js API package with versioned docs, familiar API compatibility, and modern publishing hygiene for teams that still depend on the library.
npm i @stackline/moment-core
Zero-dependency AI tool discovery and routing for MCP, OpenAI, Anthropic, and Gemini catalogs
npm i @stackline/tool-router
Compatibility-first text section replacement with corrected marker metadata and first-party types
npm i @stackline/update-section
Zero-dependency Node.js writable sink with exact dev-null compatibility and first-party types
npm i @stackline/dev-null
Compatibility-first HTTP Link header parser for Node.js and browsers
npm i @stackline/parse-link-header
SQLite conversation memory store for Stackline AI development and tests.
npm i @stackline/ai-memory-sqlite
Framework-neutral Stackline AI Studio web component.
npm i @stackline/ai-ui
Find the nearest parent containing a file or directory with callback, sync, and Promise APIs
npm i @stackline/find-parent-dir
A maintained ResizeObserver polyfill and ponyfill covering box size options from the latest spec, with focused docs for performance and browser behavior.
npm i @stackline/resize-observer
Maintained combine-source-map-compatible combiner with synchronous APIs, modern mappings, and defensive parsing
npm i @stackline/combine-source-map
Maintained convert-source-map-compatible parser with linear-time discovery and defensive property handling
npm i @stackline/convert-source-map
Maintained inline-source-map-compatible generator for Node.js, TypeScript, CommonJS, ESM, and browser bundles
npm i @stackline/inline-source-map
Universal, spec-correct and memory-safe Server-Sent Events toolkit for AI streaming, browsers, servers and edge runtimes
npm i @stackline/sse
Compatibility-first CommonJS module deduplication for linked and copied dependency trees
npm i @stackline/dynamic-dedupe
Deterministic, cycle-aware JSON serialization with a fast-json-stable-stringify-compatible API and RFC 8785 canonicalization
npm i @stackline/stable-stringify
Secure, immutable, zero-dependency deep merge with a deepmerge-compatible API for ESM, CommonJS, TypeScript, and browsers
npm i @stackline/deepmerge
Dependency-free terminal column measurement with Unicode 17 grapheme handling and compatibility with the historical callable wcwidth API.
npm i @stackline/wcwidth
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Engineering notes
Implementation details, security boundaries, and migration tradeoffs from the package maintainers.
Security
Deep merge untrusted objects safely
Unsafe keys, array semantics, compatibility aliases, and regression tests.
Data integrity
Stable and canonical JSON are different tools
Choose the right serializer for cache keys, signatures, and logs.
Streaming
Build a bounded SSE client for AI streams
Parsing, cancellation, reconnects, limits, and provider event shapes.
AI systems
Route tool catalogs before model inference
Reduce context without losing native MCP or provider definitions.
Release discipline
Each package owns its API contract, documentation, test matrix, license, and release history.