MUD doesn’t validate schemas for onchain writes or deletions, it's the developer's responsibility to use correct encoding. Using the wrong key schema onchain is effectively a no-op, since the data ends up in a storage slot that won’t be read when using the correct schema. The expectation is that the sync stack ignores these no-op logs, but it was previously throwing during decode.

fix(explorer): display remotely updated table values (#3737) (@latticexyz/explorer)

Table values updated remotely are now also reflected in the table viewer.

chore(explorer): append base world ABI to API endpoint (#3653) (@latticexyz/explorer)

World ABI endpoint is now includes the base world ABI.

feat(entrykit): loosen min gas balance (#3689) (@latticexyz/entrykit)

Loosened minimum gas balance requirement in onboarding to allow for any gas balance above zero.

fix(explorer): fetch from sqlite indexer in production (#3679) (@latticexyz/explorer)

Fixed fetching data from @latticexyz/store-indexer /q API endpoint in production builds.

feat(explorer): url params for interact and decode forms (#3713) (@latticexyz/explorer)

Interact and Decode forms now support URL parameters.

refactor(store-sync): migrate to isomorphic-ws (#3762) (@latticexyz/store-sync)

The preconfirmed logs stream is now using isomorphic-ws for more control over error handling and reconnection logic.

fix(common): improve codegen error visibility (#3662) (@latticexyz/common)

Improved surfacing of errors during code generation.

feat(explorer): collapsible sections for functions (#3727) (@latticexyz/explorer)

Interact page is now organized into collapsible namespace and system sections.

fix(explorer): wallets connect options (#3732) (@latticexyz/explorer)

Restore wallet connection options in the wallet connect modal.

fix(explorer): various fixes (#3712) (@latticexyz/explorer)

Boolean values can now be submitted on the Interact page.
Fixed redirects when only a single local world is deployed.
Chain logos are now displayed correctly when running the Explorer locally.
Fixed scrolling behavior in the table dropdown when viewing non-selected tables.
Verified world dropdown now appears immediately after pasting a world address, without waiting for all worlds to resolve.

feat(world-module-metadata): remove resource existence check (#3650) (@latticexyz/world-module-metadata)

Adding/deleting resource tags no longer checks if resource exists, only if you're the resource namespace owner.

feat(store-sync): system/world ABI from metadata (#3642) (@latticexyz/store-sync)

getWorldAbi now returns a full world ABI (errors, parameter names, mutability, etc.) registered by the deployer using the metadata module.

Also added internal functions getSystemAbi and getSystemAbis to retrieve system-specific ABIs.

feat(entrykit): move to connectkit (#3721) (@latticexyz/entrykit)

Migrated EntryKit's underlying wallet connection handling from RainbowKit to ConnectKit.

feat(store-indexer): format sql queries (#3687) (@latticexyz/store-indexer)

The local SQLite indexer now automatically converts camelCase column names to snake_case to comply with the SQL API.

fix(store-sync): handle pending deleted dynamic value in stash storage adapter (#3714) (@latticexyz/store-sync)

Fixed a bug that caused the stash storage adapter to crash when deleting a dynamic field and writing to it again in the same block.

fix(store-sync): handle pending deletion in stash storage adapter (#3672) (@latticexyz/store-sync)

Pending deletions immediately followed by field updates are now handled correctly by the Stash storage adapter.

feat(explorer): read-only mode (#3701) (@latticexyz/explorer)

Added read-only mode with no wallet connection that only shows non-editable sections of the Explorer.

chore(explorer): remove indexer endpoint (#3678) (@latticexyz/explorer)

Removed the Explorer’s SQLite indexer API endpoint in favor of the equivalent /q endpoint from @latticexyz/store-indexer.

fix(world): batchCall in sendUserOperationFrom (#3693) (@latticexyz/world)

Fixed a bug related to batchCall in sendUserOperationFrom.

feat(explorer): use systems abis in decode form (#3646) (@latticexyz/explorer)

Added the /system-abis endpoint to retrieve ABIs by system IDs.
The search form for decoding selectors now uses all system ABIs for complete results.
The ABI page has been renamed to Decode.

fix(explorer): re-render externally updated table (#3692) (@latticexyz/explorer)

Table row data now correctly re-renders when updated outside the Explorer.

feat(world,entrykit): add sendUserOperationFrom (#3675) (@latticexyz/entrykit)

EntryKit's SessionClient now automatically routes sendUserOperation through callFrom like it does with writeContract calls.

chore(entrykit): various improvements (#3699) (@latticexyz/entrykit)

EntryKit now returns to the login flow modal after a successful top-up.
The default chain is now selected as the source chain if the connected chain is not part of selectable chains.
The "Switch chain" button now uses the primary color, making it appear clickable.
The successful deposit status message has been updated.

fix(world): fix static array arguments in system libraries (#3661) (@latticexyz/world)

Fix static array arguments in system libraries.

feat(explorer): add chain switch (#3705) (@latticexyz/explorer)

Chain switching between supported networks is now accessible on the homepage and the world page.

chore(explorer): coinbase wallet support (#3749) (@latticexyz/explorer)

Coinbase wallet is now supported.

feat(entrykit): fork walletconnect connector (#3725) (@latticexyz/entrykit)

Replaced WalletConnect connector with our own internal fork to resolve some chain switching issues (see https://github.com/wevm/wagmi/pull/4691).

feat(entrykit): add pyrope fee estimation (#3640) (@latticexyz/entrykit)

Added explicit gas estimation for Pyrope to avoid overpaying.

refactor(entrykit): use skipToken instead of enabled (#3686) (@latticexyz/entrykit)

Updated React Query usages to use skipToken instead of conditional a queryFn to avoid warnings in newer versions of React Query.

feat(explorer): resolve paths using chain ID or name (#3735) (@latticexyz/explorer)

Explorer will now automatically resolve and redirect deep links using a chain ID to their corresponding chain name, e.g.

https://explorer.mud.dev/690/worlds/0x2d70F1eFFbFD865764CAF19BE2A01a72F3CE774f

feat(entrykit): quarry paymaster relay.link top-up (#3688) (@latticexyz/entrykit)

Added support for Quarry paymaster top-up via relay.link deposit form.

feat(entrykit): show only deposit chains with balance (#3730) (@latticexyz/entrykit)

The chain selector dropdown for bridged deposits now only displays chains with available funds.

feat(explorer): fetch deprecated world ABI (#3654) (@latticexyz/store-sync)

getWorldAbi() now returns an ABI that is a combination of:

base World ABI
system ABIs stored onchain with metadata module during deploy
world functions

feat(entrykit): enable copying session wallet address (#3698) (@latticexyz/entrykit)

Session wallet address can now be copied from EntryKit modal.

fix(world): support generating libraries for systems without function registration (#3670) (@latticexyz/world)

Support generating libraries for systems without function registration.

chore(explorer): optional systemIds param for system ABIs endpoint (#3651) (@latticexyz/explorer)

systemIds parameter is now optional for the system ABIs API endpoint.

fix(explorer): read env vars (#3709) (@latticexyz/explorer)

Environment variables are now loaded from the .env file alongside those specified via CLI flags.

feat(entrykit): gas balance withdraw (#3724) (@latticexyz/entrykit)

You can now withdraw your gas balance from the Quarry paymaster.

feat(entrykit): separate loading state from invalid state (#3767) (@latticexyz/entrykit)

useSessionClient will now return an error state when no user is connected. This separates the session client's pending state (querying data to determine if prerequisites are met) from invalid state (EntryKit misconfigured, user not connected, or prerequisites not met), allowing apps to provide better loading indicators within connect buttons.

The built-in AccountButton already uses this new behavior to show a pending icon while querying for the session client's prerequisites.

feat(store-sync): add flag to define chunking behavior during initial hydration (#3745) (@latticexyz/store-sync)

The sync stack now supports defining the chunking behavior during initial hydration. Chunking remains enabled by default.

Chunking is useful to avoid blocking the main thread for too long, but it can lead to updates that happened in the same block being split across multiple chunks. If chunking is enabled, clients should account for this by waiting for full hydration before using the update stream. If atomicity of updates is important and blocking the main thread is not an issue, set this to false.

feat(explorer): interact system calls (#3718) (@latticexyz/explorer)

The Interact tab now supports system functions. The functions can be searched by namespace, system name, or function name.

feat(store-sync): make pending logs sync more resilient (#3743) (@latticexyz/store-sync)

The sync stack now handles downtime in the pending logs API and reconnects once it's available again.

fix(entrykit): make required gas balance non-zero (#3691) (@latticexyz/entrykit)

Increased required balance/allowance to greater than zero.

fix(store-sync): setup message listener before setting up subscription (#3765) (@latticexyz/store-sync)

Fixed a race condition in the preconfirmed logs stream by setting up the message listener before setting up the subscription.

feat(world-module-metadata): add metadata system lib (#3645) (@latticexyz/world-module-metadata)

Added experimental system library for metadata system. Note that this is marked experimental as we may make breaking changes to the interface.

import { metadataSystem } from "@latticexyz/world-metadata-module/src/codegen/experimental/systems/MetadataSystemLib.sol";

metadataSystem.setResourceTag(namespaceId, bytes32("label"), "hello");

feat(world): find systems based on inheritance (#3649) (@latticexyz/world, @latticexyz/cli)

mud CLI commands will now recognize systems if they inherit directly from the base System imported from @latticexyz/world/src/System.sol, allowing you to write systems without a System suffix.

import {System} from "@latticexyz/world/src/System.sol";

contract EntityProgram is System {
  ...
}

If you have contracts that inherit from the base System that aren't meant to be deployed, you can mark them as abstract contract or disable the system's deploy via config.

chore: increase react peer dep range (#3728) (@latticexyz/stash, @latticexyz/store-sync)

Added React 19.x to the peer dependency range.

feat(store-sync): stream json from indexer snapshot (#3761) (@latticexyz/store-sync)

Fetching a snapshot from the indexer will now parse JSON as a stream, avoiding issues with large snapshots where the string is too long to parse in one go.

fix: assert -> with (#3739) (@latticexyz/cli, @latticexyz/entrykit, @latticexyz/store-sync)

Updated JSON imports to use with annotation instead of assert.

fix(stash): maintain update atomicity in subscribeQuery (#3663) (@latticexyz/stash)

Stash now preserves batch updates when subscribing to query results. Previously, while Stash supported batching table updates for atomic onchain changes, subscribing to query results would split these updates by table.

feat(explorer): textarea string fields (#3746) (@latticexyz/explorer)

String fields in the "Interact" tab now support multiline values.

feat(entrykit): add wiresaw transport (#3703) (@latticexyz/entrykit)

Added experimental support for fast user operations on Wiresaw-enabled chains.

fix(cli): don't deploy abstract contracts (#3669) (@latticexyz/cli, @latticexyz/common)

CLI will no longer deploy abstract systems and contracts without bytecode.

fix(world): support functions with missing argument names in system libraries (#3671) (@latticexyz/world)

Adds support for functions with missing argument names in system libraries.

fix(entrykit): sign session wallet after top-up (#3697) (@latticexyz/entrykit)

The login flow now only attempts to register the session account after it has been successfully funded.

fix(explorer): update only changed table values (#3733) (@latticexyz/explorer)

Table cell edits are now saved only when the value has changed.

feat(explorer): verified worlds (#3707) (@latticexyz/explorer)

Verified worlds are now shown in the world selection form.

feat(common): add paymaster for testnet chains, remove rhodolite (#3770) (@latticexyz/common)

Added Quarry paymaster address for Garnet and Pyrope chain configs. And removed defunct Rhodolite chain config.

feat(entrykit): move to connectkit (#3721) (create-mud)

Bumped Viem and Wagmi versions in templates.

feat(entrykit): move to connectkit (#3721) (@latticexyz/entrykit)

Until we can add ERC-6492 support to our CallWithSignature module, EntryKit will now throw a readable error when signing a message using ERC-6492 instead of failing the transaction.

feat(store-indexer): add experimental/local SQL API endpoint (#3676) (@latticexyz/store-indexer)

Added experimental SQL API endpoint /q to the SQLite indexer. This is only intended for local development purposes and should not be used in production.

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Package last updated on 27 Jun 2025

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