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. v0.5.41 — Studio assets can land in your open project

    • Add Studio assets directly to the project currently open in Summer Engine
    • Cloud assets now download into the local project before you use them, instead of pretending they already exist on disk
    • Embedded Studio understands the open project and falls back safely for older desktop clients
    Added
    • Studio asset install bridge: embedded Studio can add one or more cloud assets directly to the open desktop project, without making you hunt through a separate download folder
    • Imported Studio assets land under res://assets/summer with per-asset manifests so the editor and future cloud sync can identify where each cloud asset lives locally
    Improved
    • Studio asset cards, detail modals, and preview modals now share the same Add to project flow and report clearer local/cloud import state
    • The desktop bridge advertises project, scene, and asset-install capabilities so Studio can choose direct native import or the older server bridge safely
    • Chat can receive a prepared user message for selected assets, setting up the follow-up "use these in my scene" flow
    Fixed
    • Adding assets from embedded Studio no longer assumes cloud assets already exist on disk; they are downloaded into the open local project before use
    View details

  2. v0.5.39 — Summer Cloud, rock-solid terminal, and one-step transparent assets

    • Summer Cloud is in research preview — try backing up and syncing your projects to the cloud, with a new Cloud dashboard on the web and a Cloud tab in Studio
    • Terminal commands are rock-solid now: approvals do not falsely time out, results never get lost on a reload or flaky connection, and you always see exactly what ran
    • Generate a transparent-background asset in one step — or strip the background off anything you already made
    • Premium mode is sharper and can see your images — it now runs on a faster, vision-capable model with a much larger context window
    • Run several projects and windows at once and the AI always reaches the right one
    • Ask for a whole world and Summer ships a playable slice first instead of silently churning through hundreds of generations
    Added
    • Summer Cloud (research preview): an early look at cloud storage and sync for your projects, with a /dashboard/cloud overview (storage meter, per-project file list) and a new Cloud tab in Studio — it is evolving fast and we would love your feedback
    • Summer Cloud in the CLI and MCP (research preview): summer cloud sync commands with restorable versions, pre-apply checkpoints, and conflict handling so your editor can autosync as you build
    • One-step transparent images: ask for a transparent background and Summer generates the image and removes the background in a single step, plus a standalone background-removal tool for assets you already have
    • Save anything from Studio on the desktop app: images, audio, video, 3D models, and full GLB and ZIP exports now download straight through the native app
    • 3D characters generate in a clean T-pose, ready to rig
    Improved
    • Premium mode handles images natively now — paste a screenshot or mockup and it sees it directly, on a faster model with more headroom for long chats
    • Over-scoped requests get honest expectations: ask for a full world (or to clone a AAA game with no mistakes) and Summer builds a playable vertical slice first — one zone, reuse-first — then expands, instead of firing off dozens of generations blind
    • Multi-window routing: the desktop-to-chat bridge now routes per window, so edits and imports always land in the project you meant
    • You can keep typing in chat while your game is running
    • Blocked generations now tell you to rephrase instead of showing a generic error
    • Smoother sign-in: your language and where you were headed are preserved through login, signup, and pricing
    • Cancellation handling is more accurate — you keep paid access until your billing period actually ends
    • The desktop app is lighter on your machine when idle, and stays instant while you are actively working
    Fixed
    • Terminal approvals no longer time out when you click Run, results survive reloads and flaky connections, and commands never accidentally run twice
    • Project rules (.summerrules) load reliably now — when you ask the AI to read them and automatically on project open — including non-English and Unicode content
    • Default video generation works again with a refreshed model lineup
    • Asset imports auto-retry transient connection hiccups instead of failing the whole turn
    • Game templates import cleanly: the editor picks up new project settings, autoloads, and input actions right away, and the play button launches the right scene
    • Image-to-3D results no longer get lost when saving
    • Fewer unexpected chat errors, and finished answers are no longer mislabeled as cut off (so no needless Continue prompt)
    View details

  3. v0.5.32 — Smarter 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

  4. v0.5.31 — Studio 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

  5. v0.5.30 — Desktop ↔ 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

  6. v0.5.28 — Smoother 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

  7. v0.5.20 — Skills, 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

  8. v0.5.15 — Bridge 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

  9. v0.5.11 — C# 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

  10. v0.4.8 — Windows 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

  11. v0.4.5 — Sparkle 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

  12. v0.4.4 — macOS 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

  13. v0.5.1 — Bulk 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

  14. v0.5.0 — Introducing 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

  15. v0.4.3 — Intelligent 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

  16. v0.4.2 — New 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

  17. v0.4.1 — Godot 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

  18. v0.1.1 — Dashboard & 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

  19. v0.1.0 — Initial 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