Release notes

Changelog

Summer Engine is the AI game engine - you build games through conversation. This page lists every release: new tools for the AI, smarter code editing, and improvements to how you create games together.

  1. v0.5.32Smarter Auto mode, editor write lock, and pricing refresh

    • Auto mode rebuilt — faster, more reliable agentic turns with intelligent multi-model routing (still the best value per message)
    • Desktop 0.5.32 locks the editor while the AI writes, so your open scenes and scripts stay in sync
    • New Basic plan ($5/mo), yearly billing, and clearer credit tiers — Studio creation now requires an active subscription
    • Shorter effective context window in Auto — start a fresh chat for big builds so the AI stays focused
    Added
    • Auto mode routes across multiple models behind the scenes — text work uses a new agentic coding model; image attachments automatically upgrade to a vision-capable model
    • Basic plan ($5/month, $5 credits) for hands-on Godot assist; Pro+ positioned for AI-led game building
    • Yearly billing on Pro, Pro Plus, and Ultra (20% off, credits still refresh monthly)
    • $3 startup bonus for new accounts (replaces the old $10/month free credit grant)
    • Localized game templates and marketing copy in German, Spanish, Japanese, Portuguese, and Chinese
    • Studio asset creation and generation gated behind an active paid subscription (chat welcome bonus still works)
    Improved
    • Auto mode: much faster tool loops, better multi-step reasoning across tool calls, and clearer thinking in the UI
    • AI write lock — the native editor pauses manual edits while a turn is running, with heartbeat renewal for long jobs
    • Desktop 0.5.32: mutation leases and editor reconciliation so AI writes match what you see in open inspectors, docks, and viewports
    • Structured tool errors — bridge timeouts, missing files, and failed ops return feedback in chat instead of breaking the whole turn
    • Bridge and state-read timeouts extended to 60s for heavier imports and scene reads
    • Snapshot tools hidden from non-vision models so Auto no longer hallucinates scene screenshots it cannot see
    • Onboarding resume gate, auth hardening, and polished marketing handoff from web to desktop
    • Credit warnings simplified — clearer separation between out-of-credits and upstream gateway errors
    • Free-tier GameSoul onboarding capped at 100 drafts before upgrade prompt
    Fixed
    • Retry on a failed turn no longer replays historical bridge state reads from earlier messages
    • Game view embed toggles reconcile correctly after macOS upgrades to 0.5.32
    • Meshy image-to-3D and text-to-3D payloads cleaned up after v6 API drift
    • 3D generation progress cards deduplicated and persist across new messages in the same chat
    • Navigation language switcher placement and xl breakpoint overflow
    View details
  2. v0.5.31Studio tilesets, Meshy v6, and calmer tool errors

    • AI Tileset Slicer and Asset Pack Planner in Studio — turn sprite sheets into classified, named packs ready for your project
    • Meshy v6 for image-to-3D and text-to-3D, with a clearer generation UI that stays visible across chat turns
    • AI tools now return structured feedback when the engine is busy instead of breaking the whole chat turn
    • Smarter bulk import routing so large asset drops stay responsive in the editor
    Added
    • Studio: AI Tileset Slicer — upload a sheet, slice, classify (character, prop, terrain, UI, VFX), name, and save as an asset pack
    • Studio: Asset Pack Planner wizard — theme, review, per-asset generation, then save the full pack
    • Studio: Asset packs surface with working links into your library
    • Skill playbook for placing generated assets into scenes
    • Completion sound when a chat turn finishes, synced with the Conjured timer
    • Settings overlay inside the editor — account and billing without leaving your project
    • Stale web-bundle detection so the editor shell refreshes after a deploy
    Improved
    • Meshy v6 exposed to the AI and Studio 3D tools with updated model routing
    • 3D-from-image jobs keep a persistent progress card across new messages in the same chat
    • Import tools batch large drops and align with the 0.5.31 desktop import pipeline
    • Bridge and tool timeouts tuned for heavier state reads and imports
    • Retry on a failed turn no longer replays historical bridge reads from earlier messages
    • Stream resume handles empty gateway responses more gracefully
    Fixed
    • Asset generation shows every image in a multi-output run, not only the first
    • Windows import relay and background 3D jobs behave correctly across chat turns
    • Tileset upscale and recreate flows report clearer errors in the UI
    View details
  3. v0.5.30Desktop ↔ web bridge overhaul

    • Major reliability pass on the connection between the chat and your open project
    • Live desktop heartbeat in chat so you can see when the editor is actually reachable
    • Required-update flow with clear full-screen guidance when auto-update cannot migrate your install
    • AI leans on live engine state before reporting that work succeeded
    Added
    • Dismissible banner when a chat stream stalls waiting on the desktop bridge
    • /api/desktop/alive signal wired into the chat experience
    • Full-screen update blocker for installs that must migrate before continuing
    Improved
    • Cached chat history for faster sidebar loads when reopening projects
    • Prompt context wait window extended to match the desktop relay under heavy turns
    • Agent prompts emphasize runtime evidence over assumptions after tool calls
    • macOS and Windows 0.5.30 builds notarized / signed with both export template flavors
    Fixed
    • Editor state reads stay responsive during long AI turns with many tool calls
    • Watchdog recovers stalled streams instead of leaving silent placeholders
    • Update prompts only surface when a full reinstall is actually required
    View details
  4. v0.5.28Smoother updates and import fidelity

    • In-app updates back on Windows with Velopack; macOS Sparkle path refined
    • WebView cache bypass after install so you land on the latest UI immediately
    • Steady desktop release cadence (0.5.23–0.5.27) with signing and template parity
    Improved
    • Windows Velopack installer with published SHA256 and restored one-click update path
    • macOS post-merge auto-install hook for Sparkle builds
    • Import keeps the original image extension from the source file
    View details
  5. v0.5.20Skills, rewind, and a stronger agent harness

    • Nine production-grade game-building skills (movement, combat, UI, and more)
    • Rewind an individual assistant message when you want to back up one step
    • Run-and-verify loop with heartbeats and raised timeouts for multi-step engine work
    • Opus 4.7 on the free tier plus an expanded model lineup
    Added
    • Skill library wired into orchestrator prompts for repeatable multi-step workflows
    • Per-message Rewind with confirmation modal
    • previewScene and SummerGit checkpoint tools in the harness
    • Plan files and updateTodos verify-gate for structured agent tasks
    • summer/skills knowledge pattern for composing tools across a turn
    • Template import via download + tar extract; enableGodotPlugin helper for fresh projects
    Improved
    • runAndVerify: three-attempt retry loop with progress heartbeats
    • 3D generation capabilities and in-chat documentation
    • Chat model entitlements and routing for new providers
    • Turn caps on tool calls and wall-clock time to keep long runs bounded
    Fixed
    • Reject Pending Changes renamed from Undo All, with a confirm dialog
    • Bridge timeout diagnostics downgraded to warnings where appropriate
    View details
  6. v0.5.15Bridge relay and theme reliability

    • Bridge relay now handles every tool call through one path — fewer mystery timeouts
    • Theme and dark mode stay in sync in the chat rail
    • macOS 0.5.13 and Windows 0.5.15 desktop builds with bridge and launch fixes
    Improved
    • Non-React bridge relay with prewarm tuning and version tracking
    • Theme requests on chrome.webview with retry when the host wakes late
    • Eliminated redundant bridge calls and tightened message memoization in chat
    Fixed
    • PostWebMessageAsJson channel mismatch on Windows
    • Windows 0.5.12 launch crash on Windows N/KN editions
    • Windows 0.5.13 disables intro video path that conflicted with some NVIDIA drivers
    • Prompt context failure cache uses a stable key across working-set revisions
    View details
  7. v0.5.11C# support and new AI tool system

    • Full .NET/C# support on macOS and Windows
    • New AI tool system with smarter code editing and project understanding
    • Improved export pipeline and texture format defaults
    Added
    • .NET/C# support: create and edit C# scripts, bundled .NET SDK, GodotSharp assemblies
    • New AI tool system for more reliable code editing and scene manipulation
    • Bundled export templates for one-click game exports on macOS
    Improved
    • macOS export defaults now use ETC2/ASTC texture formats (fewer export blockers)
    • Export error messages link to troubleshooting guide
    • macOS app bundle includes all dependencies for offline use
    View details
  8. v0.4.8Windows updater & cross-platform polish

    • Seamless in-app updates on Windows (download, install, relaunch)
    • Sparkle auto-updates on macOS
    • WebView hardening and MCP onboarding improvements
    Added
    • Windows in-app download with progress, silent NSIS install, and project restore on relaunch
    • MCP onboarding and safety defaults for fresh AI chats
    Improved
    • WebView security hardening
    • Sparkle update flow refinements on macOS
    View details
  9. v0.4.5Sparkle auto-updates

    • Native Sparkle framework for in-app updates on macOS
    • Automatic update checks and one-click install
    Added
    • Sparkle framework integration for seamless macOS updates
    Improved
    • Update flow: check, download, and install without leaving the app
    View details
  10. v0.4.4macOS release

    • Updated billing system and improved dashboard and invoicing logic
    • Project manager and editor improvements
    Improved
    • Pricing is now much more transparent and easier to understand
    • Project manager updates and improvements
    View details
  11. v0.5.1Bulk Asset Import and Import Reliability

    • Bulk import assets in one go: Ask Summer to build a village, forest, or city and it now imports all the assets in a single batch instead of one at a time. One scan, one wait, then everything is ready to place.
    • Import reliability fixed: Assets imported by the AI now appear and work immediately, without needing to switch tabs or refocus the editor. The engine correctly discovers new files and runs the import pipeline.
    • Historical chats no longer re-run: Opening a previous chat from your history no longer fires off all the old operations again. The engine stays responsive when you browse past conversations.
    • Summer gives you a heads-up before bulk imports so you stay fully in control of the process.
    Added
    • importAssets: Import multiple assets in one batch. Plan what you need (trees, houses, props), then import all at once. One filesystem scan instead of one per asset.
    • ImportFromUrlBatch: Engine op that downloads and writes all files, then runs a single scan. Built for villages, forests, and any scene that needs many assets.
    Improved
    • ImportFromUrl now uses scan_changes so new directories and files are discovered correctly. Fixes assets not appearing until tab switch.
    • AI prompts updated so Summer tells you before bulk import that the computer may lag for a few seconds.
    • Asset placement guide at top of prompts: search, import, InstantiateScene with scene (not scenePath), SetProp, snapshot.
    Fixed
    • Historical chat re-execution: Opening a past chat no longer replays all ops to the engine. Messages loaded from DB are marked historical and skip bridge dispatch.
    • Import recursion and cache errors: update_file + reimport_files failed for new dirs and caused recursive import. Switched to scan_changes for imported assets.
    View details
  12. v0.5.0Introducing Subagents: Parallel AI Power

    • Meet Subagents: The main AI can now spin up independent, parallel agents to research your codebase or execute complex, multi-step tasks in the background
    • Real-time visibility: Watch the subagents stream their thoughts and use tools live in the chat, keeping you fully in the loop
    • Fast and comprehensive: The new 'Explore' subagent rapidly searches, greps, and reads your files, handing off a neat summary back to the main chat
    • No more context overload: Deep-dive investigations happen in their own thread, keeping the main conversation clean and focused on building your game
    Added
    • Subagent Architecture: The orchestrator AI can now delegate tasks to specialized, background AI agents
    • Explore Subagent: A fast, read-only agent built for rapid codebase discovery using ripgrep and file system tools
    • General Purpose Subagent: A fully capable agent that inherits the orchestrator's intelligence for making complex edits autonomously
    Improved
    • UI Chat Experience: Subagent activity streams live as a beautifully interleaved transcript of thoughts and tools, ending with a clear summary report
    Fixed
    • File Reading Reliability: Hardened the bridge between Summer Engine and the AI so it perfectly reads the exact file requested, even if you are actively working in another tab
    View details
  13. v0.4.3Intelligent subagents, grep, shell tools, and more

    • Subagents: The main AI can spin up parallel agents to research your codebase or execute complex tasks in the background. And big improvements to core tools.
    • Grep tools: Fast code search across your project with ripgrep
    • Shell tools: Run commands with user approval for full control
    • Improved tool calling: Smarter edit flow, strReplace, glob, and unified diff preview
    • Bulk asset import: Import villages, forests, or cities in one batch
    • Import reliability: Assets appear immediately without tab switching
    Added
    • Subagent architecture: Orchestrator delegates to specialized background agents
    • Explore subagent: Rapid codebase discovery with ripgrep and file tools
    • Grep tools for AI code search across the project
    • Shell command execution with user approval
    • strReplace for surgical edits, glob for file discovery
    • importAssets and ImportFromUrlBatch for bulk asset imports
    Improved
    • Tool calling: AI chooses the right tool (strReplace vs replaceText vs writeFile)
    • Unified edit preview with accept/reject controls
    • ImportFromUrl uses scan_changes so assets appear immediately
    • Historical chats no longer re-run operations when browsing
    • macOS installer: signed and notarized, export templates bundled
    Fixed
    • File reading reliability when working in another tab
    • Import recursion and cache errors for new directories
    View details
  14. v0.4.2New tools and smarter code editing

    • New strReplace tool for precise, token-efficient edits: rename variables, fix typos, or swap snippets without rewriting whole files
    • New glob tool to find files by pattern (e.g. all .gd scripts, scenes in a folder). Discover your project structure before editing
    • Smarter edit flow: the AI now chooses the right tool for each job (small tweaks vs. full rewrites vs. new files)
    • Unified edit preview so every file change shows the same clear diff with accept/reject controls
    Added
    • strReplace: surgical edits via exact string match. Great for small changes, renames, or when you need to touch one spot without resending the whole file. Supports replace_all for batch renames.
    • glob: find files by pattern across your project. Search for *.gd, **/scripts/*.tscn, or any glob pattern. Fast discovery before read or edit.
    Improved
    • Edit tools now share one consistent UI for streaming and completion: cleaner, more predictable feedback when the AI changes your code
    • Stronger AI guidance on when to use each tool: strReplace for small edits, replaceText for large ones, writeFile only for brand-new files
    • Refined readFile and writeFile behavior so the AI prefers editing existing files and only creates new ones when you ask
    View details
  15. v0.4.1Godot 4.6 + AI Tooling Overhaul

    • Bundled ripgrep for fast AI code search
    • Bundled Git for SummerGit checkpoints (no system Git required)
    • Subagent support for parallel AI tasks
    • Shell commands execution with user approval
    • Faster, higher-quality code generation
    • Large file and repo handling improvements
    Added
    • Ripgrep (grep) bundled for AI search across codebases
    • Git bundled for SummerGit. Checkpoints work without system Git
    • Subagent implementations for running parallel agents
    • Shell command execution (with user approval)
    Improved
    • Code generation speed and quality overhaul
    • Code edits now handle large files and repos much better
    View details
  16. v0.1.1Dashboard & Changelog Fixes

    • Usage dashboard now shows correct model names
    • Changelog page rebuilt with reliable data source
    Fixed
    • Usage dashboard showing wrong model names (was hardcoded to claude-4.5-sonnet)
    • Changelog page failing due to GitHub API dependency
    Removed
    • Misleading "MAX" badge from usage entries
    View details
  17. v0.1.0Initial Public Release

    • Summer Engine is now publicly available
    • Create games through conversation with AI
    Added
    • AI-powered game creation through natural conversation
    • Desktop app with embedded editor
    • Asset store with 3D models and animations
    • Real-time scene building with expert agents
    View details