Nightly (2025-10-10)

Other

• chore(cast): remove unclear pretty arg for print_storage (#11976) by @mablr
• refactor(anvil): introduce get_block_with_hash and convert_block_with_hash (#11939) by @silvekkk
• feat(forge): enhance gas snapshot diff with configurable sorting and improved output (#11974) by @silvekkk
• feat(lint): emit suggestions for named_struct_fields lint (#11982) by @mablr
• fix(doc): reuse solar sema compiler (#11980) by @grandizzy
• fix(forge): apply correct permission scoping in workflow templates (#11986) by @zerosnacks
• fix(chisel): disable compiler optimizations (#11990) by @DaniPopes
• refactor(chisel): remove gas limit binary search (#11989) by @DaniPopes
• feat(cheats): preserve struct order when parsing JSON objects (#11612) by @0xrusowsky
• chore(docs): require contributors to disclose their use of AI (#11988) by @zerosnacks
• chore(deps): bump softprops/action-gh-release from 2.3.3 to 2.3.4 (#11999) by @dependabot[bot]
• chore(deps): bump taiki-e/install-action from 2.62.13 to 2.62.21 (#11998) by @dependabot[bot]
• chore(deps): bump crate-ci/typos from 1.36.3 to 1.38.0 (#11997) by @dependabot[bot]
• fix(ci): create-an-issue in release workflow is pinned to incorrect hash (#12004) by @zerosnacks
• fix(cast): clean up SenderKind enum and remove redundant checks (#12003) by @strmfos
• chore(ci): integrate CodeQL into regular test.yml workflow and mark as requirement for ci-success (#12007) by @zerosnacks
• fix(forge): dynamic test linking should follow pranks (#12005) by @grandizzy
• ci: cache testdata project (#12009) by @DaniPopes
• fix(fmt): ensure leading blank lines are always removed (#12002) by @0xrusowsky
• feat(forge): install soldeer dependencies (#11994) by @wellnana
• ci: add test name to cache key (#12010) by @DaniPopes
• chore(test): add hints after test failed (#11995) by @silvekkk
• chore(tests): bump forge-std version (#12017) by @github-actions[bot]
• fix: improve error handling in available_senders with logging and deduplication (#12011) by @CreeptoGengar
• ci: use gha runner for macos arm releases (#12021) by @DaniPopes
• fix: replace Some(URL) with URL during installation output (#12024) by @milosdjurica
• docs(networks): fix doc heading (#12028) by @onbjerg
• chore: make network flags exclude each other (#12027) by @onbjerg
• fix(fmt): ensure commasep breaks with final trailing cmnt (#12031) by @0xrusowsky
• refactor: avoid cloning broadcast transactions in reader (#12030) by @reject-i
• deps: bump deps (#12033) by @onbjerg
• chore: rm NodeConfig::with_optimism (#12035) by @onbjerg
• chore: rm NodeConfig::with_celo (#12034) by @onbjerg
• refactor: make NetworkConfig fields private (#12037) by @onbjerg
• fix(build): use output graph/artifacts rather than sources (#12019) by @0xrusowsky
• feat(cheatcodes): add setEvmVersion / getEvmVersion (#12014) by @grandizzy
• chore: rm extra --celo arg (#12038) by @onbjerg

Full Changelog:

nightly...nightly-92d7b3551882272c820df48a38eeb4899517e60d

v1.4.0

Foundry v1.4.0

This release brings up to 10.52% better performance for forge coverage and up to 11.41% for fuzzed tests, a new formatter built on Solar, enhanced handling of multiple chain configurations and deployments, and an improved testing and debugging experience with backtraces and custom network precompiles. Foundry v1.4 is Osaka-ready, comes with new Anvil endpoints, deprecates the Etherscan v1 API, and publishes forge as an npm package.

Performance Improvements

Foundry v1.4 leverages Solar API to analyze contracts and identify coverage items (#11565), and updates coverage implementation to align with that of forge test (#11801). It also completely removes the proptest runner from fuzzed tests (#11061), resulting in up to a 10.52% performance improvement for forge coverage and up to an 11.41% performance improvement in fuzzed tests execution speed on the same benchmarked projects as previous versions.

Forge Coverage

Repository	v1.3.6	v1.4.0	X Times Faster	% Improvement
ithacaxyz-account	14.91 s	13.34 s	x1.12	10.52%
Uniswap-v4-core	1m 34.8s	1m 30.3s	x1.05	4.74%
sparkdotfi-spark-psm	3m 49.3s	3m 40.2s	x1.04	3.97%

Forge Fuzz tests

Repository	v1.3.6	v1.4.0	X Times Faster	% Improvement
ithacaxyz-account	3.18 s	3.02 s	x1.05	5.03%
solady	2.39 s	2.24 s	x1.07	6.28%
Uniswap-v4-core	6.84 s	6.20 s	x1.10	9.36%
sparkdotfi-spark-psm	3.07 s	2.72 s	x1.13	11.41%

Enhanced configuration

Configuration inheritance

Foundry v1.4 supports configuration inheritance through the extends field in foundry.toml, making it easier to maintain a shared base configuration across multiple projects or profiles (#11284). This enables cleaner setups and reduces duplication by inheriting from a base configuration file:

[profile.default]
extends = "./base-config.toml"
src = "src"
test = "test"

For more details please refer to configuration inheritance docs.

Multi-chain configuration

The newly added forge-std config helper, built on top of Foundry v1.4 cheatcodes, provides a streamlined way to manage configuration for multi-chain environments in tests and scripts. It automatically loads and parses TOML configuration files, creates forks for specified chains, and provides type-safe access to configuration variables.
Loading configuration and creating forks for each chain specified in the config can be done by calling _loadConfigAndForks function, which also supports updating configurations on the fly.

function _loadConfigAndForks(string memory filePath, bool writeToFile) internal

Scripting workflows, in particular, gain significant advantages from the features of the Config contract. Please refer to config helper docs and scripting with config docs for more details.
For a complex, production-ready example, please see Ithaca's account deploy script and configuration.

We're continuously working to improve multi-chain support, please share your feedback on the current approach and suggest new features or enhancements in #11449.

Enhanced testing UX

Foundry v1.4 introduces backtraces (#11547) that include the exact line number in the Solidity source code corresponding to the compiled bytecode where the error or revert occurred.

[FAIL: ERC20: transfer amount exceeds allowance] testTransferFromWithoutApproval() (gas: 28771)
Traces:
  [28771] ForkBacktraceTest::testTransferFromWithoutApproval()
    ├─ [22928] ForkedERC20Wrapper::transferFromWithoutApproval(0x55FE002aefF02F77364de339a1292923A15844B8, 0x000000000000000000000000000000000000dEaD, 1000000 [1e6])
    │   ├─ [18884] FiatTokenProxy::fallback(0x55FE002aefF02F77364de339a1292923A15844B8, 0x000000000000000000000000000000000000dEaD, 1000000 [1e6])
    │   │   ├─ [11573] FiatTokenV2_2::transferFrom(0x55FE002aefF02F77364de339a1292923A15844B8, 0x000000000000000000000000000000000000dEaD, 1000000 [1e6]) [delegatecall]
    │   │   │   └─ ← [Revert] ERC20: transfer amount exceeds allowance
    │   │   └─ ← [Revert] ERC20: transfer amount exceeds allowance
    │   └─ ← [Revert] ERC20: transfer amount exceeds allowance
    └─ ← [Revert] ERC20: transfer amount exceeds allowance

Backtrace:
  at FiatTokenV2_2.transferFrom
  at FiatTokenProxy.fallback
  at ForkedERC20Wrapper.transferFromWithoutApproval (src/ForkedERC20Wrapper.sol:35:24)
  at ForkBacktraceTest.testTransferFromWithoutApproval (test/ForkBacktrace.t.sol:28:96)

Forge Formatter

Foundry v1.4 ships with a new Solidity formatter (forge fmt) built on top of Solar and replacing the previous Solang-based implementation and its limitations (#10907). This change enables faster support for new Solidity language features and allows us to address long-standing formatting bugs that were previously blocked by Solang dependency.

We've aimed for feature parity with the legacy formatter, but there may still be some edge cases that aren’t fully covered yet, so please be aware and report any issues you encounter.

Coverage-Guided Fuzzing

In addition to extending coverage-guided fuzzing and time-based campaigns to stateless fuzz tests, this version introduces ABI mutations (such as bit-flip, interesting word, increment/decrement, and Gaussian noise mutators) to enhance test coverage and help uncover new execution paths by generating diverse and edge-case inputs (#11061).

Custom Network Precompiles

Beginning with the transfer precompile contributed by the Celo team for Anvil (#11209), we have extended support to forge and cast components, making it simpler for external contributions. If you want to contribute support for a custom network, please check out documentation and Celo example within foundry-evm-networks crate.

Anvil Improvements

With this release, Anvil adds support for JS and prestate tracers, and print traces and logs when using --print-traces switch, enabling more powerful and customizable debugging capabilities. Additionally, several new RPC endpoints have been introduced:

• eth_config: exposes Anvil's current configuration, such as chain ID, fork settings, and feature flags (#11591).
• anvil_impersonateSignature: allows simulating transactions as if they were signed by a given address, useful for testing signature-based flows (#11195).
• anvil_getBlobSidecarsByBlockId: returns the blobs for a given transaction hash (#11828).

Other

• forge lint improvements: mixed case exceptions lint, ERC20 transfer check
• improve state diffs cheatcodes by adding nonce and balance diffs and by using storage layout to decode values
• addition of native vm.bound cheatcode that enables log-uniform sampling
• updated Sourcify integration to support API v2

Performance improvements

• feat(forge): Remove proptest runner from fuzzed tests (#11061) by @grandizzy
• perf: box inspectors in InspectorStack (#11100) by @DaniPopes
• perf: use fxhash for coverage hitmap (#11155) by @DaniPopes
• perf: parallelize remappings provider (#11536) by @DaniPopes
• perf: avoid project output clone (#11707) by @DaniPopes
• perf: lazy cheatcodes SignaturesIdentifier, save only if online (#11708) by @DaniPopes
• perf: link in parallel (#11710) by @DaniPopes
• perf(coverage): reserve some space for hits early (#11793) by @DaniPopes
• fix(coverage): sync implementation with forge test (#11801) by @DaniPopes

Anvil Features

• feat(anvil): improve historic state access (#10420) by @naijauser
• feat(anvil): added js tracer (#11052) by @Soubhik-10
• feat(anvil): add option to disable pool balance checks in EVM configuration (#11242) by @mablr
• feat(anvil): added anvil_impersonateSignature (#11195) by @Soubhik-10
• feat: add missing eip7702 support (#11490) by @ongyimeng
• feat(anvil): support celo transfer precompile (#11491) by @mattsse
• feat(anvil): add eth_config rpc endpoint (#11591) by @zerosnacks
• feat(anvil): calculate max_transactions based on block gas capacity (#11670) by @forkfury
• feat(anvil): add PreStateTracer support for debug_traceTransaction (#11709) by @w1tcher
• feat: print traces and logs in calltracer (#11722) by @mattsse
• feat(anvil): add support for anvil_getBlobSidecarsByBlockId (#11828) by @mablr

Anvil Fixes

• fix(anvil): specialize eth_getAccountInfo in fork mode (#11634) by @mattsse
• fix: use existing functions for accountinfo (#11134) by @mattsse
• fix(anvil): unwrap panic in eth/backend/mem/mod.rs (#11141) by @zerosnacks
• fix(anvil): v1.2 state load compatibility (#11179) by @zerosnacks
• fix(anvil): print traces for eth_simulateV1 (#11253) by @klkvr
• fix(anvil): deterministic block production (#11415) by @fubhy
• Fix: invalid tx input error in anvil component (#114...

Nightly (2025-10-09)

Other

• chore(cast): remove unclear pretty arg for print_storage (#11976) by @mablr
• refactor(anvil): introduce get_block_with_hash and convert_block_with_hash (#11939) by @silvekkk
• feat(forge): enhance gas snapshot diff with configurable sorting and improved output (#11974) by @silvekkk
• feat(lint): emit suggestions for named_struct_fields lint (#11982) by @mablr
• fix(doc): reuse solar sema compiler (#11980) by @grandizzy
• fix(forge): apply correct permission scoping in workflow templates (#11986) by @zerosnacks
• fix(chisel): disable compiler optimizations (#11990) by @DaniPopes
• refactor(chisel): remove gas limit binary search (#11989) by @DaniPopes
• feat(cheats): preserve struct order when parsing JSON objects (#11612) by @0xrusowsky
• chore(docs): require contributors to disclose their use of AI (#11988) by @zerosnacks
• chore(deps): bump softprops/action-gh-release from 2.3.3 to 2.3.4 (#11999) by @dependabot[bot]
• chore(deps): bump taiki-e/install-action from 2.62.13 to 2.62.21 (#11998) by @dependabot[bot]
• chore(deps): bump crate-ci/typos from 1.36.3 to 1.38.0 (#11997) by @dependabot[bot]
• fix(ci): create-an-issue in release workflow is pinned to incorrect hash (#12004) by @zerosnacks
• fix(cast): clean up SenderKind enum and remove redundant checks (#12003) by @strmfos
• chore(ci): integrate CodeQL into regular test.yml workflow and mark as requirement for ci-success (#12007) by @zerosnacks
• fix(forge): dynamic test linking should follow pranks (#12005) by @grandizzy
• ci: cache testdata project (#12009) by @DaniPopes
• fix(fmt): ensure leading blank lines are always removed (#12002) by @0xrusowsky
• feat(forge): install soldeer dependencies (#11994) by @wellnana
• ci: add test name to cache key (#12010) by @DaniPopes
• chore(test): add hints after test failed (#11995) by @silvekkk
• chore(tests): bump forge-std version (#12017) by @github-actions[bot]
• fix: improve error handling in available_senders with logging and deduplication (#12011) by @CreeptoGengar
• ci: use gha runner for macos arm releases (#12021) by @DaniPopes
• fix: replace Some(URL) with URL during installation output (#12024) by @milosdjurica
• docs(networks): fix doc heading (#12028) by @onbjerg
• chore: make network flags exclude each other (#12027) by @onbjerg

Full Changelog:

nightly...nightly-6f49a622bd1c2219f918752b372d401aeeb8e851

Nightly (2025-10-08)

Other

• chore(cast): remove unclear pretty arg for print_storage (#11976) by @mablr
• refactor(anvil): introduce get_block_with_hash and convert_block_with_hash (#11939) by @silvekkk
• feat(forge): enhance gas snapshot diff with configurable sorting and improved output (#11974) by @silvekkk
• feat(lint): emit suggestions for named_struct_fields lint (#11982) by @mablr
• fix(doc): reuse solar sema compiler (#11980) by @grandizzy
• fix(forge): apply correct permission scoping in workflow templates (#11986) by @zerosnacks
• fix(chisel): disable compiler optimizations (#11990) by @DaniPopes
• refactor(chisel): remove gas limit binary search (#11989) by @DaniPopes
• feat(cheats): preserve struct order when parsing JSON objects (#11612) by @0xrusowsky
• chore(docs): require contributors to disclose their use of AI (#11988) by @zerosnacks
• chore(deps): bump softprops/action-gh-release from 2.3.3 to 2.3.4 (#11999) by @dependabot[bot]
• chore(deps): bump taiki-e/install-action from 2.62.13 to 2.62.21 (#11998) by @dependabot[bot]
• chore(deps): bump crate-ci/typos from 1.36.3 to 1.38.0 (#11997) by @dependabot[bot]
• fix(ci): create-an-issue in release workflow is pinned to incorrect hash (#12004) by @zerosnacks
• fix(cast): clean up SenderKind enum and remove redundant checks (#12003) by @strmfos
• chore(ci): integrate CodeQL into regular test.yml workflow and mark as requirement for ci-success (#12007) by @zerosnacks
• fix(forge): dynamic test linking should follow pranks (#12005) by @grandizzy
• ci: cache testdata project (#12009) by @DaniPopes
• fix(fmt): ensure leading blank lines are always removed (#12002) by @0xrusowsky
• feat(forge): install soldeer dependencies (#11994) by @wellnana
• ci: add test name to cache key (#12010) by @DaniPopes
• chore(test): add hints after test failed (#11995) by @silvekkk
• chore(tests): bump forge-std version (#12017) by @github-actions[bot]
• fix: improve error handling in available_senders with logging and deduplication (#12011) by @CreeptoGengar
• ci: use gha runner for macos arm releases (#12021) by @DaniPopes

Full Changelog:

nightly...nightly-2e723dfee808cc2d4aa107920311a9e826e714bb

Nightly (2025-10-07)

Other

• chore(cast): remove unclear pretty arg for print_storage (#11976) by @mablr
• refactor(anvil): introduce get_block_with_hash and convert_block_with_hash (#11939) by @silvekkk
• feat(forge): enhance gas snapshot diff with configurable sorting and improved output (#11974) by @silvekkk
• feat(lint): emit suggestions for named_struct_fields lint (#11982) by @mablr
• fix(doc): reuse solar sema compiler (#11980) by @grandizzy
• fix(forge): apply correct permission scoping in workflow templates (#11986) by @zerosnacks
• fix(chisel): disable compiler optimizations (#11990) by @DaniPopes
• refactor(chisel): remove gas limit binary search (#11989) by @DaniPopes
• feat(cheats): preserve struct order when parsing JSON objects (#11612) by @0xrusowsky
• chore(docs): require contributors to disclose their use of AI (#11988) by @zerosnacks
• chore(deps): bump softprops/action-gh-release from 2.3.3 to 2.3.4 (#11999) by @dependabot[bot]
• chore(deps): bump taiki-e/install-action from 2.62.13 to 2.62.21 (#11998) by @dependabot[bot]
• chore(deps): bump crate-ci/typos from 1.36.3 to 1.38.0 (#11997) by @dependabot[bot]

Full Changelog:

nightly...nightly-8649a9d4bd47a7abe9962b4db38d077cac64ac7a

Nightly (2025-10-08)

Other

• chore(cast): remove unclear pretty arg for print_storage (#11976) by @mablr
• refactor(anvil): introduce get_block_with_hash and convert_block_with_hash (#11939) by @silvekkk
• feat(forge): enhance gas snapshot diff with configurable sorting and improved output (#11974) by @silvekkk
• feat(lint): emit suggestions for named_struct_fields lint (#11982) by @mablr
• fix(doc): reuse solar sema compiler (#11980) by @grandizzy
• fix(forge): apply correct permission scoping in workflow templates (#11986) by @zerosnacks
• fix(chisel): disable compiler optimizations (#11990) by @DaniPopes
• refactor(chisel): remove gas limit binary search (#11989) by @DaniPopes
• feat(cheats): preserve struct order when parsing JSON objects (#11612) by @0xrusowsky
• chore(docs): require contributors to disclose their use of AI (#11988) by @zerosnacks
• chore(deps): bump softprops/action-gh-release from 2.3.3 to 2.3.4 (#11999) by @dependabot[bot]
• chore(deps): bump taiki-e/install-action from 2.62.13 to 2.62.21 (#11998) by @dependabot[bot]
• chore(deps): bump crate-ci/typos from 1.36.3 to 1.38.0 (#11997) by @dependabot[bot]
• fix(ci): create-an-issue in release workflow is pinned to incorrect hash (#12004) by @zerosnacks
• fix(cast): clean up SenderKind enum and remove redundant checks (#12003) by @strmfos
• chore(ci): integrate CodeQL into regular test.yml workflow and mark as requirement for ci-success (#12007) by @zerosnacks
• fix(forge): dynamic test linking should follow pranks (#12005) by @grandizzy
• ci: cache testdata project (#12009) by @DaniPopes
• fix(fmt): ensure leading blank lines are always removed (#12002) by @0xrusowsky
• feat(forge): install soldeer dependencies (#11994) by @wellnana
• ci: add test name to cache key (#12010) by @DaniPopes

Full Changelog:

nightly...nightly-396937cf7992fc6fd584a6bb59b6d696102ab16c

v1.4.0-rc3

Foundry v1.4.0

This release brings up to 10.52% better performance for forge coverage and up to 11.41% for fuzzed tests, a new formatter built on Solar, enhanced handling of multiple chain configurations and deployments, and an improved testing and debugging experience with backtraces and custom network precompiles. Foundry v1.4 is Osaka-ready, comes with new Anvil endpoints, deprecates the Etherscan v1 API, and publishes forge as an npm package.

Performance Improvements

Foundry v1.4 leverages Solar API to analyze contracts and identify coverage items (#11565), and updates coverage implementation to align with that of forge test (#11801). It also completely removes the proptest runner from fuzzed tests (#11061), resulting in up to a 10.52% performance improvement for forge coverage and up to an 11.41% performance improvement in fuzzed tests execution speed on the same benchmarked projects as previous versions.

Forge Coverage

Repository	v1.3.6	v1.4.0	X Times Faster	% Improvement
ithacaxyz-account	14.91 s	13.34 s	x1.12	10.52%
Uniswap-v4-core	1m 34.8s	1m 30.3s	x1.05	4.74%
sparkdotfi-spark-psm	3m 49.3s	3m 40.2s	x1.04	3.97%

Forge Fuzz tests

Repository	v1.3.6	v1.4.0	X Times Faster	% Improvement
ithacaxyz-account	3.18 s	3.02 s	x1.05	5.03%
solady	2.39 s	2.24 s	x1.07	6.28%
Uniswap-v4-core	6.84 s	6.20 s	x1.10	9.36%
sparkdotfi-spark-psm	3.07 s	2.72 s	x1.13	11.41%

Enhanced configuration

Configuration inheritance

Foundry v1.4 supports configuration inheritance through the extends field in foundry.toml, making it easier to maintain a shared base configuration across multiple projects or profiles (#11284). This enables cleaner setups and reduces duplication by inheriting from a base configuration file:

[profile.default]
extends = "./base-config.toml"
src = "src"
test = "test"

For more details please refer to configuration inheritance docs.

Multi-chain configuration

The newly added forge-std config helper, built on top of Foundry v1.4 cheatcodes, provides a streamlined way to manage configuration for multi-chain environments in tests and scripts. It automatically loads and parses TOML configuration files, creates forks for specified chains, and provides type-safe access to configuration variables.
Loading configuration and creating forks for each chain specified in the config can be done by calling _loadConfigAndForks function, which also supports updating configurations on the fly.

function _loadConfigAndForks(string memory filePath, bool writeToFile) internal

Scripting workflows, in particular, gain significant advantages from the features of the Config contract. Please refer to config helper docs and scripting with config docs for more details.
For a complex, production-ready example, please see Ithaca's account deploy script and configuration.

We're continuously working to improve multi-chain support, please share your feedback on the current approach and suggest new features or enhancements in #11449.

Enhanced testing UX

Foundry v1.4 introduces backtraces (#11547) that include the exact line number in the Solidity source code corresponding to the compiled bytecode where the error or revert occurred.

[FAIL: ERC20: transfer amount exceeds allowance] testTransferFromWithoutApproval() (gas: 28771)
Traces:
  [28771] ForkBacktraceTest::testTransferFromWithoutApproval()
    ├─ [22928] ForkedERC20Wrapper::transferFromWithoutApproval(0x55FE002aefF02F77364de339a1292923A15844B8, 0x000000000000000000000000000000000000dEaD, 1000000 [1e6])
    │   ├─ [18884] FiatTokenProxy::fallback(0x55FE002aefF02F77364de339a1292923A15844B8, 0x000000000000000000000000000000000000dEaD, 1000000 [1e6])
    │   │   ├─ [11573] FiatTokenV2_2::transferFrom(0x55FE002aefF02F77364de339a1292923A15844B8, 0x000000000000000000000000000000000000dEaD, 1000000 [1e6]) [delegatecall]
    │   │   │   └─ ← [Revert] ERC20: transfer amount exceeds allowance
    │   │   └─ ← [Revert] ERC20: transfer amount exceeds allowance
    │   └─ ← [Revert] ERC20: transfer amount exceeds allowance
    └─ ← [Revert] ERC20: transfer amount exceeds allowance

Backtrace:
  at FiatTokenV2_2.transferFrom
  at FiatTokenProxy.fallback
  at ForkedERC20Wrapper.transferFromWithoutApproval (src/ForkedERC20Wrapper.sol:35:24)
  at ForkBacktraceTest.testTransferFromWithoutApproval (test/ForkBacktrace.t.sol:28:96)

Forge Formatter

Foundry v1.4 ships with a new Solidity formatter (forge fmt) built on top of Solar and replacing the previous Solang-based implementation and its limitations (#10907). This change enables faster support for new Solidity language features and allows us to address long-standing formatting bugs that were previously blocked by Solang dependency.

We've aimed for feature parity with the legacy formatter, but there may still be some edge cases that aren’t fully covered yet, so please be aware and report any issues you encounter.

Coverage-Guided Fuzzing

In addition to extending coverage-guided fuzzing and time-based campaigns to stateless fuzz tests, this version introduces ABI mutations (such as bit-flip, interesting word, increment/decrement, and Gaussian noise mutators) to enhance test coverage and help uncover new execution paths by generating diverse and edge-case inputs (#11061).

Custom Network Precompiles

Beginning with the transfer precompile contributed by the Celo team for Anvil (#11209), we have extended support to forge and cast components, making it simpler for external contributions. If you want to contribute support for a custom network, please check out documentation and Celo example within foundry-evm-networks crate.

Anvil Improvements

With this release, Anvil adds support for JS and prestate tracers, and print traces and logs when using --print-traces switch, enabling more powerful and customizable debugging capabilities. Additionally, several new RPC endpoints have been introduced:

• eth_config: exposes Anvil's current configuration, such as chain ID, fork settings, and feature flags (#11591).
• anvil_impersonateSignature: allows simulating transactions as if they were signed by a given address, useful for testing signature-based flows (#11195).
• anvil_getBlobSidecarsByBlockId: returns the blobs for a given transaction hash (#11828).

Other

• forge lint improvements: mixed case exceptions lint, ERC20 transfer check
• improve state diffs cheatcodes by adding nonce and balance diffs and by using storage layout to decode values
• addition of native vm.bound cheatcode that enables log-uniform sampling
• updated Sourcify integration to support API v2

Performance improvements

• feat(forge): Remove proptest runner from fuzzed tests (#11061) by @grandizzy
• perf: box inspectors in InspectorStack (#11100) by @DaniPopes
• perf: use fxhash for coverage hitmap (#11155) by @DaniPopes
• perf: parallelize remappings provider (#11536) by @DaniPopes
• perf: avoid project output clone (#11707) by @DaniPopes
• perf: lazy cheatcodes SignaturesIdentifier, save only if online (#11708) by @DaniPopes
• perf: link in parallel (#11710) by @DaniPopes
• perf(coverage): reserve some space for hits early (#11793) by @DaniPopes
• fix(coverage): sync implementation with forge test (#11801) by @DaniPopes

Anvil Features

• feat(anvil): improve historic state access (#10420) by @naijauser
• feat(anvil): added js tracer (#11052) by @Soubhik-10
• feat(anvil): add option to disable pool balance checks in EVM configuration (#11242) by @mablr
• feat(anvil): added anvil_impersonateSignature (#11195) by @Soubhik-10
• feat: add missing eip7702 support (#11490) by @ongyimeng
• feat(anvil): support celo transfer precompile (#11491) by @mattsse
• feat(anvil): add eth_config rpc endpoint (#11591) by @zerosnacks
• feat(anvil): calculate max_transactions based on block gas capacity (#11670) by @forkfury
• feat(anvil): add PreStateTracer support for debug_traceTransaction (#11709) by @w1tcher
• feat: print traces and logs in calltracer (#11722) by @mattsse
• feat(anvil): add support for anvil_getBlobSidecarsByBlockId (#11828) by @mablr

Anvil Fixes

• fix(anvil): specialize eth_getAccountInfo in fork mode (#11634) by @mattsse
• fix: use existing functions for accountinfo (#11134) by @mattsse
• fix(anvil): unwrap panic in eth/backend/mem/mod.rs (#11141) by @zerosnacks
• fix(anvil): v1.2 state load compatibility (#11179) by @zerosnacks
• fix(anvil): print traces for eth_simulateV1 (#11253) by @klkvr
• fix(anvil): deterministic block production (#11415) by @fubhy
• Fix: invalid tx input error in anvil component (#114...

Nightly (2025-10-05)

Other

Full Changelog:

nightly...nightly-fcdf5b1ea891c870337ec49e435b20a4d9abdc4e

Nightly (2025-10-06)

Other

• chore(deps): weekly cargo update (#11971) by @github-actions[bot]

Full Changelog:

nightly...nightly-1c6ade9ae41c0a29a4cf4a0793d3de6a4f6a1b4e

Nightly

Other

• chore(cast): remove unclear pretty arg for print_storage (#11976) by @mablr
• refactor(anvil): introduce get_block_with_hash and convert_block_with_hash (#11939) by @silvekkk
• feat(forge): enhance gas snapshot diff with configurable sorting and improved output (#11974) by @silvekkk
• feat(lint): emit suggestions for named_struct_fields lint (#11982) by @mablr
• fix(doc): reuse solar sema compiler (#11980) by @grandizzy
• fix(forge): apply correct permission scoping in workflow templates (#11986) by @zerosnacks
• fix(chisel): disable compiler optimizations (#11990) by @DaniPopes
• refactor(chisel): remove gas limit binary search (#11989) by @DaniPopes
• feat(cheats): preserve struct order when parsing JSON objects (#11612) by @0xrusowsky
• chore(docs): require contributors to disclose their use of AI (#11988) by @zerosnacks
• chore(deps): bump softprops/action-gh-release from 2.3.3 to 2.3.4 (#11999) by @dependabot[bot]
• chore(deps): bump taiki-e/install-action from 2.62.13 to 2.62.21 (#11998) by @dependabot[bot]
• chore(deps): bump crate-ci/typos from 1.36.3 to 1.38.0 (#11997) by @dependabot[bot]
• fix(ci): create-an-issue in release workflow is pinned to incorrect hash (#12004) by @zerosnacks
• fix(cast): clean up SenderKind enum and remove redundant checks (#12003) by @strmfos
• chore(ci): integrate CodeQL into regular test.yml workflow and mark as requirement for ci-success (#12007) by @zerosnacks
• fix(forge): dynamic test linking should follow pranks (#12005) by @grandizzy
• ci: cache testdata project (#12009) by @DaniPopes
• fix(fmt): ensure leading blank lines are always removed (#12002) by @0xrusowsky
• feat(forge): install soldeer dependencies (#11994) by @wellnana
• ci: add test name to cache key (#12010) by @DaniPopes
• chore(test): add hints after test failed (#11995) by @silvekkk
• chore(tests): bump forge-std version (#12017) by @github-actions[bot]
• fix: improve error handling in available_senders with logging and deduplication (#12011) by @CreeptoGengar
• ci: use gha runner for macos arm releases (#12021) by @DaniPopes
• fix: replace Some(URL) with URL during installation output (#12024) by @milosdjurica
• docs(networks): fix doc heading (#12028) by @onbjerg
• chore: make network flags exclude each other (#12027) by @onbjerg
• fix(fmt): ensure commasep breaks with final trailing cmnt (#12031) by @0xrusowsky
• refactor: avoid cloning broadcast transactions in reader (#12030) by @reject-i
• deps: bump deps (#12033) by @onbjerg
• chore: rm NodeConfig::with_optimism (#12035) by @onbjerg
• chore: rm NodeConfig::with_celo (#12034) by @onbjerg
• refactor: make NetworkConfig fields private (#12037) by @onbjerg
• fix(build): use output graph/artifacts rather than sources (#12019) by @0xrusowsky
• feat(cheatcodes): add setEvmVersion / getEvmVersion (#12014) by @grandizzy
• chore: rm extra --celo arg (#12038) by @onbjerg

Full Changelog:

nightly...nightly-92d7b3551882272c820df48a38eeb4899517e60d