v0.5.2

Agentic Framework

• Anthropic client — Native Anthropic API client for direct provider integration
• Agent storage — New storage: true agent field for persistent agent state
• Agent strategy — strategy field support in agent declarations for delegation control
• Step confirmations — awaiting_confirm step status with StepConfirmPayload for human-in-the-loop approval flows

Compiler & Language

• Triple-quoted strings — """...""" multi-line string literals in AST, lexer, parser, and formatter
• Lambda syntax — (params) => expr closure syntax replacing fn(params) { ... }
• Formatter expansion — Significantly expanded expression formatting (~200 lines)
• Stdlib codegen — New stdlib code generation mappings for storage, excel, and auth modules
• Checker updates — storage and strategy recognized as valid agent fields

Runtime & Primitives

• Array builtins — Expanded array operations (~217 lines of new helpers)
• Math builtins — New math utility functions
• Auth improvements — Enhanced auth resolution with credential file and OAuth support
• Upload enhancements — Expanded file upload handling
• Workflow improvements — Extended workflow execution capabilities
• Server updates — Additional server routing and middleware support
• Store/Memory — Enhanced store and memory management

Stdlib

• Excel tables — Expanded stdlib/excel with table-based spreadsheet processing
• Langfuse — Updated Langfuse observability integration
• Postgres/SQLite — Extended store implementations for both database backends

UI SDK

• Step component — Expanded haira-step with confirmation UI (~133 lines)
• Form/Pipeline — Updated form and pipeline components
• Types — New StepConfirmPayload type export in ARP SDK

Release & Distribution

• GPG-signed releases — Release archives are now GPG-signed with detached .asc signatures; install script verifies signatures automatically
• macOS codesign fix — Removed CI ad-hoc codesigning (caused SIGKILL on user machines); install script now performs local ad-hoc codesigning instead
• Dynamic website version — Website navbar version is now fetched from GitHub Releases API at build time instead of being hardcoded
• Auto-rebuild on release — Docs workflow now triggers on release: published events so the website updates automatically after each release

Install

curl -fsSL https://haira.dev/install.sh | sh

Full Changelog: v0.4.0...v0.5.2

v0.4.0

Changelog

All notable changes to Haira are documented in this file.

[v0.4.0] - 2026-03-08

Agentic Framework

• Eval framework — New eval top-level declaration and haira eval CLI command for automated agent evaluation with test cases, scoring, and pass/fail thresholds
• Cross-harness export — haira build --target claude-code generates .claude/agents/*.md, .claude/commands/*.md, mcp-servers.json, and an MCP server binary for custom tools
• Tool lifecycle hooks — @before { } and @after { } blocks inside tool declarations for pre/post-processing logic
• Verification loops — verify { assert ... } blocks inside workflow steps that integrate with @retry for automatic assertion-driven retries
• Agent delegation strategy — strategy: "parallel" (fan-out) and strategy: "sequential" (chain) fields on agents with handoffs
• Pre-built agent templates — stdlib/agents package with 8 reusable templates: CodeReviewer, Planner, SecurityReviewer, Summarizer, DataAnalyst, CustomerSupport, TDDGuide, DocWriter
• Dynamic agents — create_agent() runtime support for programmatically creating agents from config maps
• Auth module — stdlib/auth for API key resolution (env var, credentials file, Claude Code OAuth)

Compiler & Language

• Stdlib expansion — OS primitives, web search, healthcheck modules, and new UI components
• Type alias codegen — type Name = Type now correctly emits Go type aliases with typed list coercion in struct literals
• Checker improvements — Deeper type checking, spec alignment, enum exhaustiveness, and websearch/healthcheck module recognition
• Return value enforcement — Compiler enforces return values in functions
• LSP improvements — Better IDE support, formatting integration, and tree-sitter grammar fixes
• Formatter — haira fmt command for in-place source formatting
• Tree-sitter — Grammar fixes for editor syntax highlighting

Runtime & Infrastructure

• Built-in providers — Default provider configurations
• UI theming — Theme support with embedded UI bundle
• Workflow enhancements — Improved workflow execution, form display, and table rendering
• ARP/SSE fixes — Proper event: headers for delta and done events in Server-Sent Events
• Spawn capture — spawn { } blocks correctly capture concurrent results

Documentation & Tooling

• Website — Landing page, multilang docs, SEO, and analytics
• Spec updates — Language specification aligned with current compiler state
• Due diligence — Comprehensive code quality review (phases 1-5)
• New examples — 35 example programs covering all language features
• POCs — Coding agent, Cloudflare agent, data explorer, DevOps incident, and pipeline form proof-of-concepts

Bug Fixes

• Fixed driver error handling and CLI decode errors
• Fixed XSS removal in UI rendering
• Fixed fmt import detection for tool declarations
• Fixed cropped text in UI components
• Fixed umami script type annotation

[v0.3.0] - 2026-02-23

Initial public release with core language, agentic primitives, and Cloudflare Workers target.

Full Changelog: v0.3.0...v0.4.0

v0.3.0

v0.3.0 — ARP SDK & Console

Highlights

ARP (Agentic Rendering Protocol) SDK — The protocol that connects agent backends to frontend renderers is now a standalone, reusable monorepo:

• @haira/arp — Transport-agnostic TypeScript client (WebSocket + SSE), zero DOM dependencies
• @haira/arp-react — React hooks (useArpChat) and drop-in <ArpChat> component
• @haira/arp-vue — Vue composables (useArpChat) and <ArpChat> component
• arp/go/arp — Go server library (bridge, transports, session, middleware)

Interactive Console — New haira console command with a rich terminal UI for managing Haira applications locally (readline, spinners, terminal rendering).

Orchestrator — Process orchestrator for running, monitoring, and proxying multiple Haira services (haira deploy, haira ps, haira logs).

Web UI Overhaul — haira webui serves a dev dashboard with deployment management, workbench, and observe pages. UI SDK refactored to consume @haira/arp instead of bundling its own protocol client.

Changes

• feat: ARP SDK monorepo — @haira/arp, @haira/arp-react, @haira/arp-vue, arp/go/arp
• feat: Interactive console (haira console) with readline, rendering, and spinner support
• feat: Process orchestrator with deploy, proxy, and store
• feat: Web UI dashboard with deployments page and micro-loader architecture
• fix: Windows build support — platform-specific terminal stubs for console package
• fix: CI pipeline — bundle runtime before vet/test (go:embed dependency)
• chore: Production build pipeline (make publish) with stripped binaries (-s -w)
• chore: Split UI and server — compiled programs get a micro-loader HTML, full SDK is CLI-only

Breaking Changes

• UI HTML templates (chat.html, form.html, index.html) removed in favor of loader.html micro-loader
• ui_chat.go and ui_form.go removed from primitive — UI now rendered client-side via ARP

Install

# macOS (Apple Silicon)
curl -sL https://github.com/mrzdevcore/haira/releases/download/v0.3.0/haira-v0.3.0-darwin-arm64.tar.gz | tar xz
sudo mv haira-v0.3.0-darwin-arm64/bin/haira /usr/local/bin/

# macOS (Intel)
curl -sL https://github.com/mrzdevcore/haira/releases/download/v0.3.0/haira-v0.3.0-darwin-amd64.tar.gz | tar xz
sudo mv haira-v0.3.0-darwin-amd64/bin/haira /usr/local/bin/

# Linux (x86_64)
curl -sL https://github.com/mrzdevcore/haira/releases/download/v0.3.0/haira-v0.3.0-linux-amd64.tar.gz | tar xz
sudo mv haira-v0.3.0-linux-amd64/bin/haira /usr/local/bin/

# Linux (ARM64)
curl -sL https://github.com/mrzdevcore/haira/releases/download/v0.3.0/haira-v0.3.0-linux-arm64.tar.gz | tar xz
sudo mv haira-v0.3.0-linux-arm64/bin/haira /usr/local/bin/

Full Changelog: v0.2.0...v0.3.0

v0.2.0

What's New in v0.2.0

This is a major release introducing the Agentic Rendering Protocol (ARP), a complete UI SDK rewrite, and significant runtime enhancements.

Agentic Rendering Protocol (ARP)

• New transport-agnostic protocol for agent-to-renderer communication
• WebSocket transport (/_arp/v1) with capability negotiation and auto-reconnect
• SSE transport preserved for backward compatibility — existing clients work unchanged
• ArpBridge() — single translation point from StreamChunk to ArpMessage
• ARP spec defined in spec/arp/ (protocol + component catalog)

New UI SDK (Lit Web Components)

• Complete rewrite from vanilla JS to Lit web components
• 12 built-in components: table, status-card, code-block, diff, key-value, progress, form, confirm, choices, chart, product-cards, group
• <haira-ui-renderer> — universal component renderer with fallback
• <haira-chat> — full chat interface with WebSocket + SSE dual transport
• Chat session persistence with history sidebar and session switching

Generative UI

• Agents render rich UI components via ui.* helpers in tool @render blocks
• ui.table(), ui.chart(), ui.status_card(), ui.key_value(), ui.progress(), ui.form(), ui.confirm(), ui.choices(), ui.code_block(), ui.diff(), ui.product_cards(), ui.group()
• Components automatically streamed to connected clients

MCP Support

• MCP Client: Connect to external MCP servers as tool providers
• MCP Server: Expose Haira tools via MCP protocol
• MCP over SSE: Server-Sent Events transport for MCP

Observability

• observe.langfuse() integration for LLM generation tracing
• Exporter interface for custom observability backends
• Auto-detection and tree-shaking of observability providers

New Standard Library Packages

• vector — Vector database operations (with local and Postgres backends)
• sqlite — SQLite store backend (auto-included for workflows/servers)
• langfuse — Langfuse observability exporter

Compiler & Language Enhancements

• Unit testing support with @test decorator
• Code formatter
• Enhanced type checker with better diagnostics
• Multi-file project support improvements
• LSP updates for better editor integration
• Workflow retry mechanism
• Environment variable enhancements

New Examples

• 25-embeddings.haira — Vector embeddings
• 26-rag.haira — Retrieval-Augmented Generation
• 27-structured-output.haira — Structured agent output
• 28-observe.haira — Observability with Langfuse
• 29-testing.haira — Unit testing

Proof of Concepts

• poc/data-explorer/ — Multi-source data explorer with Postgres, Algolia, Meilisearch

Infrastructure

• Project restructured: primitive/haira/ (core runtime), stdlib/ (tree-shaken packages)
• Tree-sitter grammar updates
• Makefile improvements

---

Full Changelog: v0.1.1...v0.2.0

v0.1.1

Full Changelog: v0.1.0...v0.1.1

v0.1.0

Full Changelog: https://github.com/mrzdevcore/haira/commits/v0.1.0