v0.9.0

What's Changed since v0.8.0

Architecture

• Pure kernel extraction — createCore() is now a frontend-agnostic kernel (EventBus, ContextManager, HandlerRegistry, Compositor). The agent backend, LLM client, and provider management are loaded as extensions, not wired into the core.
• Compositor — new render stream routing system. All TUI output flows through named streams ("agent", "query", "status") mapped to surfaces. Extensions redirect streams to capture output (floating panels, tmux panes, test buffers).
• RemoteSession — high-level primitive for routing agent output to external surfaces. Bundles compositor redirects, shell lifecycle advisors, and chrome suppression into one call.
• Tool protocol abstraction — deferred tool mode support alongside the existing API mode.
• Advisable shell lifecycle — shell:on-processing-start and shell:on-processing-done are now named handlers that extensions can advise.

New Extensions & Bridges

• ash-mcp-bridge — MCP server bridge for exposing agent-sh tools over MCP
• ash-acp-bridge — ACP JSON-RPC server wrapping the headless core (fixed: now loads built-in extensions, fixes async race, stops swallowing errors)
• web-access — web search and content extraction extension
• peer-mesh — cross-instance communication via remote handler calls (Ray-inspired)
• subagents — subagent orchestration extension
• openrouter — OpenRouter provider helper
• tmux-pane — tmux split pane with output-only and interactive modes via RemoteSession
• interactive-prompts — rewritten using interactive UI primitive

Overlay Agent

• Moved from built-in to examples/extensions/ — install with cp examples/extensions/overlay-agent.ts ~/.agent-sh/extensions/ or -e ./examples/extensions/overlay-agent.ts
• createFloatingPanel removed from ExtensionContext public API (FloatingPanel still importable directly)
• Fixed output leak on dismiss while agent is active
• Uses createRemoteSession for proper compositor routing

Fixes

• Bracket paste — no more auto-submit on paste, clean editor data model
• Diff rendering — truncation no longer hides actual changes (was showing only context lines)
• Compaction — configurable threshold, force-compact on manual /compact
• agent-backend — correctly reads defaultProvider from settings
• Alt screen — re-check alt screen state on overlay teardown
• Nuclear summaries — deterministic ISO timestamps
• TUI — show tail line of truncated command output, cap content width at MAX_CONTENT_WIDTH

Extension System

• registerCommand, registerInstruction, removeInstruction on ExtensionContext
• System prompt injection via named instruction blocks
• Scrollback capture and scoped cleanup
• Extension-loader exported for library consumers

Branding

• agent-sh is the primary name; ash is a short alias (alias ash=agent-sh)
• Package name prefixes like ash-mcp-bridge use the short form

Docs

• Full audit: fixed stale API references, added missing ExtensionContext methods, updated project structure, corrected tool inventory, trimmed verbose sections

Full diff

v0.8.0...v0.9.0