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chrono 0.4.42: Parse datetime strings with fixed-length fractional seconds followed by trailing literals without ParseError(TooShort), fixed in chrono 0.4.42 HOWNaiveDateTime::parse_from_strNaiveTime::parse_from_strrust MIT-0 · 2026-08-16
github.com/google/uuid v1.6.0: Guarantee strict monotonic ordering for rapid sequential UUIDv7 generation within the same millisecond in google/uuid v1.6.0 HOWuuid.NewV7go MIT-0 · 2026-08-16
gopkg.in/yaml.v3 v3.0.1: Unmarshal commented block sequences with malformed syntax without nil pointer dereference panic fixed in gopkg.in/yaml.v3 v3.0.1 HOWgopkg.in/yaml.v3.Unmarshalgo MIT-0 · 2026-08-16
packaging 24.2: Auto-enable prerelease matching for '>' and '<' specifiers containing prereleases fixed in packaging 24.2 HOWpackaging.specifiers.Specifierpackaging.specifiers.SpecifierSetpython MIT-0 · 2026-08-16
urllib3 2.6.3: Cap Retry-After delay to 21600 seconds (6 hours) by default instead of honoring unbounded server values starting in urllib3 2.6.3 HOWurllib3.util.Retryurllib3.util.Retry.parse_retry_afterurllib3.util.Retry.get_retry_afterurllib3.util.Retry.DEFAULT_RETRY_AFTER_MAXpython MIT-0 · 2026-08-16
zod 4.4.3: Restore .catch() fallback and preprocess evaluation for absent keys in z.object schemas fixed in zod 4.4.3 HOWz.objectz.ZodType.catchz.preprocessnode MIT-0 · 2026-08-16
@tanstack/query-core 5.90.20: @tanstack/query-core 5.90.20 fixes asynchronous execution of onMutate by running it synchronously during mutate() when mutationCache onMutate is undefined HOWMutationObserverQueryClientnode MIT-0 · 2026-08-16
undici 8.4.1: Dispatch Client and Pool requests composed with interceptors.dns() without origin TypeError in undici 8.4.1 HOWundici.interceptors.dnsundici.Clientundici.Poolnode MIT-0 · 2026-08-16
typescript 5.7.3: Type-only JSON imports in ECMAScript modules with NodeNext module resolution do not require import attributes or trigger TS1543 in TypeScript 5.7.3 HOWtypescript.createProgramtypescript.getPreEmitDiagnosticsnode MIT-0 · 2026-08-16
vite 8.1.5: Vite 8.1.5 scopes switch-case block declarations to the switch block during SSR transforms, preventing false function-level shadowing of imported bindings that caused ReferenceError on external references. HOWcreateServerssrLoadModulenode MIT-0 · 2026-08-16
joblib 1.5.3: Handle closure serialization failures and backend fallback when switching joblib from loky to multiprocessing HOWjoblib.Paralleljoblib.delayedjoblib.wrap_non_picklable_objectsjoblib.parallel_backendjoblib.parallel.DEFAULT_BACKENDjoblib.parallel.get_active_backendjoblib.externals.loky.backend.context.START_METHODSpython MIT-0 · 2026-08-15
react 18.3.1: Identify what breaks at runtime (hooks, context) vs passes (pure JSX) when duplicate React instances exist from peer dependency resolution in Node HOWreact.createElementreact.useStatereact.createContextreact.isValidElementreact-dom/server.renderToStringnode MIT-0 · 2026-08-15
encoding/json v1.26.5: omitempty does not omit zero-value structs or zero time.Time and does not omit non-nil pointers to zero values, but omits both nil and empty slices HOWencoding/json.Marshalomitemptygo MIT-0 · 2026-08-15
rollup 4.34.8: Marking a transpiled CommonJS dependency as external in Rollup silently breaks default imports in CJS output unless output.interop is set to auto, because @rollup/plugin-commonjs ignores external modules. HOWrollupexternaloutput.interop@rollup/plugin-commonjsnode MIT-0 · 2026-08-15
tokio 1.43.0: Spawning non-Send futures in Tokio requires driving a LocalSet explicitly, avoiding uncontextualized spawn_local panics and unpolled task starvation HOWtokio::task::LocalSettokio::task::spawn_localtokio::task::LocalSet::run_untiltokio::task::LocalSet::spawn_localrust MIT-0 · 2026-08-15
structlog 26.1.0: Hand off structlog to stdlib logging without dictConfig disabling pre-existing loggers or misplacing renderers in the processor chain HOWstructlog.configurestructlog.stdlib.LoggerFactorystructlog.stdlib.ProcessorFormatterstructlog.stdlib.ProcessorFormatter.wrap_for_formatterstructlog.stdlib.filter_by_levellogging.config.dictConfigpython MIT-0 · 2026-08-15
typescript 5.8.2: tsconfig paths resolve during TypeScript compilation but are emitted unchanged by tsc, failing at runtime in Node.js without package subpaths or bundler alias plugins HOWts.resolveModuleNamets.transpileModulecompilerOptions.pathscompilerOptions.baseUrlnode MIT-0 · 2026-08-15
golang.org/x/sync v0.22.0: Handle errgroup derived context cancellation on successful Wait, first-completion error selection, cooperative sibling cancellation, and TryGo dropping semantics HOWerrgroup.WithContextGroup.GoGroup.WaitGroup.SetLimitGroup.TryGogo MIT-0 · 2026-08-15
anyio 4.13.0: Catching child task exceptions directly with standard except clauses fails because AnyIO task groups bundle all failures into ExceptionGroup while cancelling unshielded sibling scopes HOWanyio.create_task_groupanyio.CancelScopeanyio.get_cancelled_exc_classpython MIT-0 · 2026-08-15
pino 10.3.1: Handle pino child logger option traps where serializers prototype-merge and apply to bindings immediately, child redact completely replaces parent redactions without merging, levels dynamically track the parent until severed, and messageKey, nestedKey, base, hooks, and level formatters on child are silently ignored HOWpinopino.childpino.serializerspino.redactpino.levelpino.formatterspino.hookspino.messageKeypino.nestedKeynode MIT-0 · 2026-08-15
@tanstack/query-core 5.67.1: Query options in TanStack Query v5 silently ignore cacheTime and callbacks (onSuccess/onError/onSettled) while removing status 'loading' in favor of 'pending' where isLoading is false for disabled queries HOWQueryClientQueryObservernode MIT-0 · 2026-08-15
chrono 0.4.45: Disabling chrono default features strips Utc::now and Local which require the clock feature rather than std, while serde support requires an explicit opt-in serde feature and serializes DateTime as an RFC 3339 string HOWchrono::DateTimechrono::Utcchrono::NaiveDatechrono::NaiveTimechrono::NaiveDateTimechrono::Durationrust MIT-0 · 2026-08-15
undici 7.29.0: Retry fetch requests with bodies safely and avoid cross-realm TypeError between undici and global fetch HOWfetchRequestResponseHeadersRequest.cloneRequest.bodyUsednode MIT-0 · 2026-08-15
sigs.k8s.io/yaml v1.4.0: Decode YAML with sigs.k8s.io/yaml where json tags take precedence and yaml tags are ignored unlike yaml.v3 HOWsigs.k8s.io/yaml.Unmarshalsigs.k8s.io/yaml.UnmarshalStrictgopkg.in/yaml.v3.Unmarshalgo MIT-0 · 2026-08-15
packaging 24.1: Evaluate prereleases, epochs, and local versions in SpecifierSet without falling into PEP 440 exclusion traps HOWpackaging.specifiers.SpecifierSetpackaging.specifiers.InvalidSpecifierpackaging.version.Versionpython MIT-0 · 2026-08-15
semver 7.8.5: Evaluate 0.x caret and tilde boundaries, prerelease range matching rules, and build metadata equality in semver HOWsemver.satisfiessemver.subsetsemver.intersectssemver.comparesemver.compareBuildsemver.maxSatisfyingnode MIT-0 · 2026-08-15
greenlet 3.4.0: Handle SQLAlchemy 2.0 select joinedload collection deduplication requiring unique(), multi-column scalars() column truncation, and Row mapping access via _mapping HOWsqlalchemy.selectsqlalchemy.orm.joinedloadsqlalchemy.orm.Session.scalarssqlalchemy.orm.Session.executesqlalchemy.engine.Result.uniquesqlalchemy.engine.Result.mappingssqlalchemy.engine.Row._mappingpython MIT-0 · 2026-08-15
lodash 4.17.21: CommonJS dependencies require both ssr.noExternal and ssr.optimizeDeps to load named ESM imports under Vite SSR; externalizing fails with SyntaxError while noExternal alone silently produces undefined exports. HOWcreateServerssrLoadModulessr.noExternaloptimizeDepsssr.optimizeDepsnode MIT-0 · 2026-08-15
jest 29.7.0: Jest requires Node VM modules (--experimental-vm-modules) and transform: {} to run real ESM, rejecting .js in extensionsToTreatAsEsm and failing top-level await and import.meta in default CJS pipeline HOWextensionsToTreatAsEsmtransformunstable_shouldLoadAsEsmnode MIT-0 · 2026-08-15
typescript 5.8.2: Differentiate import specifier resolution, extensionless imports, and package exports maps across TypeScript bundler, node16, and nodenext resolution modes HOWcreateProgramresolveModuleNameModuleResolutionKindModuleKindnode MIT-0 · 2026-08-15
eslint 9.20.0: Differentiate global vs scoped ignores, relative glob resolution, and universal no-files objects in ESLint v9 flat config HOWESLintcalculateConfigForFileisPathIgnoredlintTextnode MIT-0 · 2026-08-15
vitest 4.1.10: Differentiate per-file test environments, docblock precedence over project configs, sequential setupFiles DOM lifecycle, and globals:true symbol exposure in Vitest 4 HOWcreateVitestenvironmentenvironmentMatchGlobssetupFilesglobalsnode MIT-0 · 2026-08-15
ruff 0.15.22: Resolve Ruff configuration precedence across .ruff.toml, ruff.toml, pyproject.toml, and CLI flags with rule composition semantics HOWruff.find_ruff_binpython MIT-0 · 2026-08-15
pydantic-settings 2.15.0: Pin pydantic-settings source precedence (init kwargs > os.environ > .env > defaults) and nested delimiter resolution versus raw JSON env vars HOWBaseSettingsSettingsConfigDictpython MIT-0 · 2026-08-15
nikic/php-parser 5.8.0: Fix ParserFactory::create() fatalling after upgrading nikic/php-parser to v5 MIGRATIONParserFactory::createForNewestSupportedVersionPhpParser.Errorphp 8 MIT-0 · 2026-08-15
protobuf 6.33.6: Know which protobuf backend actually loaded: upb ships inside the binary wheel, so a musl/Alpine image with no prebuilt wheel silently gets the pure-Python fallback with different descriptor types and no warning HOWgoogle.protobuf.internal.api_implementation.Typegoogle.protobuf.descriptor.Descriptorpython MIT-0 · 2026-08-15
github.com/jackc/pgx/v5 v5.10.0: Handle NULL struct scans via pointers or pgtype, prevent column-mismatch errors in RowToStructByName(Lax), and safely release pgxpool connections without post-release panics HOWpgx.RowToStructByNamepgx.RowToStructByNameLaxpgx.RowToStructByPospgxpool.Poolpgxpool.Conn.Releasepgxpool.Conn.Conngo MIT-0 · 2026-08-15
lru-cache 11.5.2: Handle lru-cache TTL stale entry reads without get() silently evicting the entry on first read or maxSize dropping oversized items without error HOWLRUCacheLRUCache#getLRUCache#hasLRUCache#setLRUCache#peekLRUCache#sizeLRUCache#calculatedSizenode MIT-0 · 2026-08-15
tomli 2.4.1: Read TOML across Python versions where stdlib tomllib is absent (<3.11) versus present (>=3.11) without tripping on binary-only load, str-only loads, positional parameters, and missing dump methods HOWtomli.loadtomli.loadstomli.TOMLDecodeErrorpython MIT-0 · 2026-08-15
puppeteer 24.4.0: Distinguishing puppeteer headless: true vs headless: 'shell' flags and handling container sandbox requirements HOWpuppeteer.defaultArgspuppeteer.executablePathnode MIT-0 · 2026-08-15
httpx 0.28.1: Configure httpx timeouts across connect, read, write, and pool phases without falling for requests-style unbounded defaults, partial kwarg ValueError traps, or 2-tuple unlimited-write surprises HOWhttpx.Timeouthttpx.Clienthttpx.ConnectTimeouthttpx.ReadTimeouthttpx.WriteTimeouthttpx.PoolTimeouthttpx.TimeoutExceptionhttpx.USE_CLIENT_DEFAULTpython MIT-0 · 2026-08-15
pino 9.6.0: Route pino logs via worker transports without dropping buffered output or triggering sonic-boom unready flush errors on process exit HOWpinopino.transportpino.destinationnode MIT-0 · 2026-08-15
polars 1.43.2: Identify where Polars LazyFrame plans stop being lazy, which inspection properties emit PerformanceWarning, and how caching and row indexing alter query execution DAGs HOWpolars.LazyFrameLazyFrame.collectLazyFrame.collect_schemaLazyFrame.cacheLazyFrame.explainLazyFrame.filterLazyFrame.selectLazyFrame.with_columnsLazyFrame.with_row_indexpolars.concatpolars.exceptions.PerformanceWarningpolars.exceptions.ShapeErrorpython MIT-0 · 2026-08-15
pyarrow 25.0.1: PyArrow StringScalar equality with str literals returns False and null scalars evaluate truthy, while to_pandas degrades text columns to object dtype unless pandas metadata or ArrowDtype is present and distinct string types reject concatenation HOWpyarrow.arraypyarrow.scalarpyarrow.StringScalarpyarrow.stringpyarrow.large_stringpyarrow.string_viewpyarrow.concat_arrayspyarrow.Table.from_pydictpyarrow.Table.from_pandaspyarrow.Table.to_pandaspyarrow.Array.to_numpypyarrow.Array.to_pylistpython MIT-0 · 2026-08-15
thiserror 2.0.20: Unannotated cause fields silently sever Error::source(), #[error(transparent)] delegates rather than wrapping, and #[from] drops call-site context HOWthiserror::Errorstd::error::Error::sourcestd::convert::Fromrust MIT-0 · 2026-08-15
zod 4.4.3: Identify constructor coercion traps in z.coerce and verify that .refine() discards return values without mutating parsed output HOWz.coerce.booleanz.coerce.numberz.coerce.stringz.coerce.datez.coerce.bigintz.ZodType.refinenode MIT-0 · 2026-08-15
getrandom 0.3.4: getrandom 0.3 replaces getrandom::getrandom and js/custom cargo features with getrandom::fill and --cfg getrandom_backend="custom" linking __getrandom_v03_custom HOWgetrandom::fillgetrandom::fill_uninitgetrandom::u32__getrandom_v03_customrust MIT-0 · 2026-08-15
net/http v1.26.5: http.Transport.ResponseHeaderTimeout does not bound slow response body reads once headers arrive, while http.Client.Timeout spans the full response body lifecycle HOWhttp.Clienthttp.Transporthttp.Responsego MIT-0 · 2026-08-15
rustls 0.23.43: Configuring a custom CryptoProvider when a transitive dependency has already locked the process default via install_default. HOWrustls::crypto::CryptoProvider::install_defaultrustls::ClientConfig::builderrustls::ClientConfig::builder_with_providerrust MIT-0 · 2026-08-15
tokio 1.43.0: Calling blocking operations and nested block_on inside Tokio contexts requires navigating runtime-flavor panic traps and thread affinity guarantees HOWtokio::runtime::Handle::block_ontokio::task::block_in_placetokio::task::spawn_blockingrust MIT-0 · 2026-08-15
pandas 2.3.3: Chained assignment discards mutations while text columns default to object dtype and fallback to python storage without pyarrow HOWpandas.DataFramepandas.Seriespandas.StringDtypepandas.errors.ChainedAssignmentErrorpandas.errors.SettingWithCopyWarningpandas.options.mode.copy_on_writepython MIT-0 · 2026-08-15
undici 8.10.0: Outbound requests ignore HTTP_PROXY unless EnvHttpProxyAgent is explicitly configured, where lowercase env var spelling wins and HTTP proxy acts as fallback for HTTPS but not vice versa HOWundici.EnvHttpProxyAgentundici.ProxyAgentundici.Agentundici.getGlobalDispatcherundici.setGlobalDispatchernode MIT-0 · 2026-08-14
pillow 10.4.0: Querying Pillow format registries or codecs directly without Image.init returns empty tables or false negatives, and openable formats like PSD are absent from Image.SAVE HOWPIL.Image.initPIL.Image.SAVEPIL.Image.OPENPIL.Image.EXTENSIONPIL.Image.registered_extensionsPIL.features.checkpython MIT-0 · 2026-08-14
cryptography 47.0.0: Installing and importing cryptography requires the compiled Rust extension _rust rather than pure CFFI dynamic compilation, causing source builds on musl images to fail on Cargo instead of C toolchains. HOWcryptography.hazmat.bindings._rustcryptography.hazmat.bindings._rust.x509.Certificatecryptography.hazmat.bindings.openssl.binding.Bindingcryptography.x509.load_pem_x509_certificatecryptography.hazmat.primitives.ciphers.Cipherpython MIT-0 · 2026-08-14
ws 8.21.3: Distinguish ws package EventEmitter API and Buffer payloads from native WHATWG EventTarget WebSocket and string payloads in Node HOWWebSocketWebSocket.prototype.onWebSocket.prototype.pingWebSocket.prototype.binaryTypeWebSocketServernode MIT-0 · 2026-08-14
vite 6.2.0: Avoid renamed Vite configuration keys (brotliSize, server.force, server.fsServe) that are silently accepted but ignored at runtime. HOWresolveConfignode MIT-0 · 2026-08-14
sharp 0.33.5: Loading sharp on Alpine Linux container throws a platform-mismatch Error referencing @img/sharp-linuxmusl-x64 rather than MODULE_NOT_FOUND or source build instructions HOWsharpnode MIT-0 · 2026-08-14
go.opentelemetry.io/otel v1.45.0: Unwired OpenTelemetry tracers silently emit invalid zero-context spans while batch-buffered tracers drop spans without explicit flush or shutdown HOWgo.opentelemetry.io/otel.Tracergo.opentelemetry.io/otel/sdk/trace.NewTracerProvidergo.opentelemetry.io/otel/sdk/trace.WithSyncergo.opentelemetry.io/otel/sdk/trace.WithBatchergo.opentelemetry.io/otel/sdk/trace/tracetest.NewInMemoryExportergo MIT-0 · 2026-08-14
serde 1.0.229: Untagged enum deserialization in serde swallows all inner field and type errors across attempted variants, returning only a generic variant mismatch error. HOWserde::Deserializeserde_json::from_strrust MIT-0 · 2026-08-14
zeitwerk 2.8.3: Autoload constants with Zeitwerk and work out why a correctly written class raises Zeitwerk::NameError, what the error does and does not tell you, and what eager loading really catches HOWZeitwerk::LoaderZeitwerk::Loader#push_dirZeitwerk::Loader#setupZeitwerk::Loader#eager_loadZeitwerk::Loader#all_expected_cpathsZeitwerk::InflectorZeitwerk::Inflector#camelizeZeitwerk::Inflector#inflectZeitwerk::NameErrorZeitwerk::Errorruby 3 MIT-0 · 2026-08-14
sorbet-runtime 0.6.13426: Know what sorbet-runtime enforces when the static checker is not running, and where the same type expression is checked deeply, shallowly, or not at all HOWT::SigT::StructT::ArrayT::HashT::Types::TypedArrayT.letT.castT.unsafeT::HelpersT::Props::Serializableruby 3 MIT-0 · 2026-08-14
sinatra 4.2.1: Test a Sinatra 4 app with rack-test in the same process, with no server, and get the params, filter and 404 behaviour right instead of guessing it HOWSinatra::BaseSinatra::IndifferentHashSinatra::NotFoundSinatra::Base#haltSinatra::Base#paramsRack::Test::MethodsRack::Test::SessionRack::Protection::HostAuthorizationRack::Headersruby 3 MIT-0 · 2026-08-14
winnow 1.0.4: Port a pre-1.0 winnow parser to winnow 1.0, where the alt and tuple arity caps were lowered below what the changelog claims, the Result/ModalResult pair had already replaced PResult back in 0.7.0, dec_uint silently refuses leading zeros on every version, and 0.7.14 added a built-in Pratt parser MIGRATIONwinnow::combinator::altwinnow::combinator::seqwinnow::combinator::expressionwinnow::combinator::cut_errwinnow::combinator::separatedwinnow::combinator::repeatwinnow::ascii::dec_uintwinnow::token::literalwinnow::ModalResultwinnow::Resultrust 1 MIT-0 · 2026-08-14
wrapt 2.3.0: Subclass the right object proxy base in wrapt 2.x so iteration works HOWBaseObjectProxyObjectProxyAutoObjectProxywith_signaturefunction_wrapperpython 3.12 MIT-0 · 2026-08-14
ostruct 0.6.3: Work out which stdlib libraries Ruby 3.4 actually forces into the Gemfile and fix the LoadError, without OpenStruct silently overwriting a method a data key collides with FIXGem::BUNDLED_GEMS::SINCEOpenStructOpenStruct#[]OpenStruct#to_hSetSet#include?Abbrev.abbrevruby 3 MIT-0 · 2026-08-14
ramsey/uuid 4.9.3: Choose between UUID v4 and v7, store and parse them, and compare two UUID objects without == lying HOWRamsey.Uuid.UuidUuid::uuid4Uuid::uuid7Uuid::fromStringUuid::fromBytesUuid::isValidUuid::NILUuid::MAXUuidInterface::toStringUuidInterface::getBytesUuidInterface::getVersionUuidInterface::equalsUuidInterface::compareToRamsey.Uuid.Lazy.LazyUuidFromStringRamsey.Uuid.Rfc4122.FieldsInterfaceRamsey.Uuid.Exception.InvalidUuidStringExceptionRamsey.Uuid.Exception.UnsupportedOperationExceptionphp 8 MIT-0 · 2026-08-14
league/csv 9.28.0: Read and write CSV with league/csv without losing a UTF-8 BOM, a quote, a trailing backslash or a whitespace-only field HOWLeague.Csv.ReaderLeague.Csv.WriterLeague.Csv.BomLeague.Csv.SyntaxErrorReader::setHeaderOffsetAbstractCsv::skipInputBOMAbstractCsv::includeInputBOMAbstractCsv::setOutputBOMAbstractCsv::setEscapeWriter::forceEnclosurephp 8 MIT-0 · 2026-08-14
doctrine/dbal 4.4.4: Query an in-memory SQLite through Doctrine DBAL 4 without the parameter binding, empty result and schema introspection traps HOWDoctrine.DBAL.DriverManagerConnection::executeQueryResult::fetchAssociativeDoctrine.DBAL.ParameterTypeDoctrine.DBAL.ArrayParameterTypeQueryBuilder::createNamedParameterQueryBuilder::setParameterAbstractSchemaManager::introspectTableType::lookupNamephp 8 MIT-0 · 2026-08-14
brick/math 0.19.1: Divide and round BigDecimal money values on brick/math 0.19 after RoundingMode became an enum and of() stopped accepting floats MIGRATIONBigDecimal::dividedByBigDecimal::dividedByExactBigDecimal::fromFloatShortestBigDecimal::fromFloatExactBigInteger::dividedByRoundingModephp 8 MIT-0 · 2026-08-14
nanostores 1.4.2: Work out what nanostores' lazy mounting actually does: which argument of a listener is the changed key, why .get() fires onMount and re-runs it every second, why a computed store accepts .set(), and why .value and .get() disagree HOWnanostores.atomnanostores.mapnanostores.computednanostores.batchnanostores.onMountnanostores.keepMountnanostores.cleanStoresnanostores.listenKeysnanostores.deepMapnanostores.readonlyTypenanostores.tasknanostores.allTasksnanostores.STORE_UNMOUNT_DELAYStore.listenStore.subscribeStore.setKeyStore.getStore.valueStore.lcglobalThis.nanostoresGlobalnode 22 MIT-0 · 2026-08-14
github.com/goccy/go-yaml v1.19.2: Switch from gopkg.in/yaml.v3 to goccy/go-yaml without the silent behaviour changes MIGRATIONyaml.Marshalyaml.MarshalWithOptionsyaml.Indentyaml.IndentSequenceyaml.Unmarshalyaml.UnmarshalWithOptionsyaml.FormatErroryaml.AllowDuplicateMapKeyyaml.DuplicateKeyErrorgo 1.26 MIT-0 · 2026-08-14
req 0.7.2: Stub HTTP responses for Elixir code that uses Req, with no network, no fake server process and no mocking library HOWReq.Test.stubReq.Test.expectReq.Test.verify!Req.Test.jsonReq.Test.transport_errorReq.PlugReq.Steps.decode_bodyReq.Steps.retryReq.Steps.handle_http_errorsReq.request!Req.TransportErrorPlug.Conn.send_respelixir 1 MIT-0 · 2026-08-14
nimble_pool 1.1.0: Check a resource out of a NimblePool and survive the failure paths: what the checkout function must return, which failures the pool recovers from, and which one silently leaks a worker HOWNimblePool.start_linkNimblePool.checkout!NimblePool.updateNimblePool.child_specNimblePool.init_poolNimblePool.init_workerNimblePool.handle_checkoutNimblePool.handle_checkinNimblePool.handle_updateNimblePool.handle_cancelledNimblePool.terminate_workerelixir 1 MIT-0 · 2026-08-14
nimble_csv 1.3.0: Define a NimbleCSV parser module and parse and dump CSV with it: header skipping, quoted fields holding separators and newlines, parse errors, and iodata output HOWNimbleCSV.defineNimbleCSV.RFC4180NimbleCSV.RFC4180.parse_stringNimbleCSV.RFC4180.parse_enumerableNimbleCSV.RFC4180.parse_streamNimbleCSV.RFC4180.dump_to_iodataNimbleCSV.ParseErrorelixir 1 MIT-0 · 2026-08-14
pool 1.5.2: Run at most N async operations at once in Dart with package:pool, keep the results lined up with the inputs, and know what the timeout actually guards HOWPoolPool.withResourcePool.requestPool.forEachPool.closePool.donePool.isClosedPoolResourcePoolResource.releasePoolResource.allowReleaseTimeoutExceptiondart 3 MIT-0 · 2026-08-14
json_annotation 4.12.0: Write fromJson and toJson by hand in Dart with dart:convert and json_annotation, with no build_runner and no generated file, and find out where an unchecked payload actually fails HOWjsonDecodejsonEncodeJsonUnsupportedObjectErrorJsonConverterJsonKeyJsonSerializable$checkedCreate$checkedConvert$checkKeysCheckedFromJsonExceptionMissingRequiredKeysExceptionUnrecognizedKeysExceptionDisallowedNullValueExceptionDateTime.parseDateTime.toIso8601Stringdart 3 MIT-0 · 2026-08-14
equatable 2.1.0: Give a Dart class value equality with no code generation, so two instances with the same fields are ==, hash the same, and work as Set members and Map keys HOWEquatableEquatable.propsEquatable.stringifyEquatableMixinEquatableConfigEquatableConfig.stringifycopyWithhashCodeSet.containsMap.containsKeydart 3 MIT-0 · 2026-08-14
args 2.7.0: Build and test a package:args CommandRunner subcommand CLI, telling apart which node reports a UsageException and pinning the option rules that differ from argparse, getopt and clap HOWCommandRunnerCommandRunner.runCommand.runCommand.argResultsCommand.usageExceptionUsageExceptionArgParser.addFlagArgParser.addOptionArgParserExceptionArgResults.flagArgResults.optionArgResults.restdart 3 MIT-0 · 2026-08-14
rand 0.9.5: Update rand 0.8 code to 0.9 after thread_rng, gen and gen_range were renamed, and keep tests reproducible MIGRATIONrand::rngRng::randomRng::random_rangeSeedableRng::seed_from_u64rust 1 MIT-0 · 2026-08-14
chrono 0.4.45: Build and add to dates with chrono 0.4 without the deprecated constructors, and know when month arithmetic clamps HOWDateTime::from_timestampNaiveDate::from_ymd_optNaiveDateTime::and_utcNaiveDate::checked_add_monthsrust 1 MIT-0 · 2026-08-14
shelf 1.4.2: Handle and test shelf HTTP requests in Dart without binding a port, by building a Request and calling the router, middleware and handler directly HOWRouterRouter.routeNotFoundRequest.paramsPipeline.addMiddlewareMiddlewareResponse.okMessage.readAsStringMessage.readResponse.changeRequest.changedart 3 MIT-0 · 2026-08-14
symfony/console 8.1.4: Test a symfony/console command with CommandTester, with no process and no terminal HOWSymfony.Component.Console.Tester.CommandTesterCommandTester::executeCommandTester::setInputsCommandTester::runSymfony.Component.Console.Tester.ApplicationTesterCommand::configureCommand::executeInputArgument::REQUIREDInputOption::VALUE_REQUIREDOutputInterface::VERBOSITY_VERBOSESymfony.Component.Console.Question.Questionphp 8 MIT-0 · 2026-08-14
ecto 3.14.1: Validate a plain map with Ecto.Changeset alone: an embedded_schema, no Repo, no database and no ecto_sql HOWEcto.Schema.embedded_schemaEcto.Changeset.castEcto.Changeset.validate_requiredEcto.Changeset.validate_numberEcto.Changeset.validate_formatEcto.Changeset.validate_lengthEcto.Changeset.empty_valuesEcto.Changeset.field_missing?Ecto.Changeset.apply_actionEcto.Changeset.apply_changesEcto.Changeset.traverse_errorsEcto.Changeset.put_changeEcto.Changeset.force_changeEcto.InvalidChangesetErrorelixir 1 MIT-0 · 2026-08-14
once_cell 1.21.4: Decide what still needs once_cell now that std has OnceLock, LazyLock, cell::OnceCell and cell::LazyCell, by measuring which once_cell APIs have a stable std equivalent on this rustc and which are still gated MIGRATIONstd::sync::OnceLockOnceLock::setOnceLock::get_or_initOnceLock::takestd::sync::LazyLockLazyLock::forceLazyLock::force_mutstd::cell::OnceCellstd::cell::LazyCellonce_cell::sync::OnceCellonce_cell::sync::OnceCell::get_or_try_initonce_cell::sync::Lazyonce_cell::unsync::OnceCellrust 1 MIT-0 · 2026-08-14
axum 0.8.9: Test axum handlers and routing without binding a port by driving the whole Router through tower's ServiceExt::oneshot, and get the exact status for each way a request can be wrong HOWtower::ServiceExt::oneshotaxum::Router::routeaxum::Router::with_stateaxum::extract::Pathaxum::extract::Queryaxum::extract::Stateaxum::Jsonaxum::body::Bodyhttp_body_util::BodyExt::collectaxum::debug_handlerrust 1 MIT-0 · 2026-08-14
@modelcontextprotocol/sdk 1.30.0: Test an MCP server in-process over InMemoryTransport, and find out which tool failures arrive as an error result and which as a JSON-RPC error HOWInMemoryTransport.createLinkedPairMcpServer.registerToolMcpServer.registerResourceClient.connectClient.callToolClient.listToolsClient.readResourceCallToolResult.isErrorMcpErrorErrorCodeLATEST_PROTOCOL_VERSIONDEFAULT_REQUEST_TIMEOUT_MSECnode 22 MIT-0 · 2026-08-14
github.com/spf13/viper v1.21.0: Pin spf13/viper's configuration precedence order and the env, IsSet and case-folding traps around it, without reading a config file from disk HOWviper.Newviper.SetDefaultviper.Setviper.BindPFlagviper.AutomaticEnvviper.SetEnvPrefixviper.SetEnvKeyReplacerviper.BindEnvviper.AllowEmptyEnvviper.ReadConfigviper.AddRemoteProviderviper.RemoteConfigviper.ReadRemoteConfigviper.IsSetviper.Getviper.AllKeysviper.Unmarshalviper.ExperimentalBindStructgo 1.26 MIT-0 · 2026-08-14
gorm.io/gorm v1.31.2: Run GORM on SQLite with CGO_ENABLED=0, past go-sqlite3's runtime stub error HOWsqlite.Opengorm.Opengorm.DeletedAtgorm.ErrRecordNotFoundgorm.ErrDuplicatedKeygorm.Config.TranslateErrorsql.Opensql.DriversDB.PingDB.AutoMigrateDB.UpdatesDB.UpdateDB.SelectDB.FirstDB.FindDB.UnscopedDB.Creatego 1.26 MIT-0 · 2026-08-14
rich 15.0.0: Render rich Console output to a string a test can assert on, and pin the escape codes, width, markup and highlighting that decide what the string holds HOWrich.console.ConsoleConsole.captureConsole.export_textforce_terminalcolor_systemrich.style.Stylerich.table.Tablerich.markup.escaperich.errors.MarkupError__rich____rich_console__highlightpython 3.12 MIT-0 · 2026-08-14
freezegun 1.5.5: Freeze the clock in a Python test with freezegun so datetime, time.time and time.monotonic agree, and know what freeze_time cannot reach HOWfreezegun.freeze_timeFrozenDateTimeFactory.tickFrozenDateTimeFactory.move_totz_offsetdatetime.datetime.nowdatetime.datetime.utcnowdatetime.date.todaytime.timetime.monotonictime.perf_counterpython 3.12 MIT-0 · 2026-08-14
superjson 2.2.6: See exactly what JSON.stringify destroys about a Date, Map, Set, BigInt, undefined, NaN, Infinity and RegExp, and which of them superjson puts back HOWsuperjson.stringifysuperjson.parsesuperjson.serializesuperjson.deserializesuperjson.registerClasssuperjson.allowErrorPropsSuperJSONResult.metaJSON.stringifynode 22 MIT-0 · 2026-08-14
bcryptjs 3.0.3: Hash and verify passwords on Node without a native module, choosing between node:crypto's scrypt and bcryptjs HOWcrypto.scryptSynccrypto.timingSafeEqualcrypto.randomBytesbcrypt.hashSyncbcrypt.compareSyncbcrypt.getSaltbcrypt.truncatesnode 22 MIT-0 · 2026-08-14
json 2.9.1: Read and write JSON in Ruby on an image with no C compiler, where oj cannot be installed, without the built-in json defaults changing the data HOWJSON.parseJSON.generateJSON.pretty_generateJSON.dumpJSON.loadJSON::StateJSON::GeneratorErrorJSON::ParserErrorJSON::Ext::GeneratorObject#to_jsonruby 3 MIT-0 · 2026-08-14
collection 1.19.1: Compare two Dart Lists, Maps or Sets by their contents, and use one as a cache key, when == on a collection is identity HOWListEqualityMapEqualitySetEqualityIterableEqualityDeepCollectionEqualityDeepCollectionEquality.unorderedDeepCollectionEquality.hashgroupByfirstWhereOrNullwhereNotNullHashMapdart 3 MIT-0 · 2026-08-14
serde 1.0.229: serde deny_unknown_fields stops rejecting unknown keys once the struct is flattened, while the pair the documentation calls unsupported compiles and works in the ordinary case FIXDeserializedeny_unknown_fieldsflattenrename_allrename_all_fieldsdefaultskip_serializing_iftagrust 1 MIT-0 · 2026-08-14
lightningcss 1.33.0: Run lightningcss on Alpine, where the native addon really does come in per-libc builds HOWlightningcss.transformdetectLibc.familySynclightningcss-linux-x64-musllightningcss-linux-x64-gnunode 22 MIT-0 · 2026-08-14
tokio 1.53.1: Make tokio timer code deterministic and instant in tests with a paused clock, driving sleep, timeout, interval and select! on virtual time from a hand-built runtime rather than #[tokio::test] HOWtokio::runtime::Builder::start_pausedtokio::runtime::Builder::enable_timetokio::time::sleeptokio::time::timeouttokio::time::intervaltokio::time::advancetokio::time::Instanttokio::selectrust 1 MIT-0 · 2026-08-14
polars 1.43.2: Port pandas DataFrame code to polars on Alpine, without the wheel surprise or the silently wrong answers MIGRATIONpolars.DataFramepolars.LazyFramepolars.colpolars.lenDataFrame.filterDataFrame.selectDataFrame.with_columnsDataFrame.with_row_indexDataFrame.group_byGroupBy.aggLazyFrame.collectLazyFrame.explainLazyFrame.collect_schemaExpr.map_elementsExpr.aliasSeries.is_nullSeries.is_nanSeries.fill_nullSeries.fill_nanSeries.eq_missingpolars.exceptions.ColumnNotFoundErrorpolars.exceptions.DuplicateErrorpolars.exceptions.PerformanceWarningDataFrame.vstackDataFrame.hstackDataFrame.extendDataFrame.insert_columnDataFrame.drop_in_placepython 3.12 MIT-0 · 2026-08-14
nesbot/carbon 3.13.2: Choose between Carbon and CarbonImmutable, and get timezone conversion, DST arithmetic and a frozen test clock right HOWCarbon.CarbonCarbon.CarbonImmutableCarbonInterface::addDayCarbonInterface::avoidMutationCarbonInterface::setTimezoneCarbonInterface::shiftTimezoneCarbonInterface::diffInDaysCarbonInterface::diffInHoursCarbonInterface::startOfDayCarbon::parseCarbon::setTestNowCarbon::withTestNowphp 8 MIT-0 · 2026-08-14
github.com/lmittmann/tint v1.2.0: Pin down the log/slog Handler contract that custom and third-party handlers have to honour HOWslog.NewJSONHandlerslog.HandlerOptions.ReplaceAttrslog.Logger.WithGroupslog.LogValuerslog.Handler.Enabledtint.NewTextHandlertint.NewHandlergo 1.26 MIT-0 · 2026-08-14
attrs 26.1.0: Decide whether attrs still buys anything over dataclasses on modern Python, and what changes in each direction MIGRATIONattrs.defineattrs.fieldattrs.frozenattrs.evolveattrs.validators.instance_ofattrs.validators.disabledattrs.setters.NO_OPattrs.asdictattrs.exceptions.FrozenInstanceErrorattr.sdataclasses.dataclassdataclasses.replacedataclasses.FrozenInstanceErrorpython 3.12 MIT-0 · 2026-08-14
zod 4.4.3: Read what zod 4 safeParse returns when validation fails, and what the error surface changed from zod 3 HOWsafeParseZodError.issuesZodIssue.receivedz.coerce.numberz.unionz.discriminatedUnionz.emailnode 22 MIT-0 · 2026-08-14
drizzle-orm 0.45.2: Run drizzle-orm against an in-memory SQLite with no native module and no server, using node:sqlite as the driver HOWsqliteTabledrizzle-orm/sqlite-proxydrizzle-orm/sqlite-proxy/migratornode:sqlite.DatabaseSyncStatementSync.setReturnArrayssqleqDrizzleQueryErrornode 22 MIT-0 · 2026-08-14
github.com/spf13/cobra v1.10.2: Drive a spf13/cobra command tree from a test with SetArgs and SetOut, without a subprocess, and tell the failure modes of Execute apart HOWCommand.SetArgsCommand.ExecuteCommand.SetOutCommand.RunECommand.PersistentFlagsCommand.MarkFlagRequiredCommand.MarkPersistentFlagRequiredCommand.InheritedFlagsCommand.LocalFlagsCommand.SilenceUsageCommand.SilenceErrorscobra.ArbitraryArgscobra.NoArgsgo 1.26 MIT-0 · 2026-08-14
bun 1.3.14: Use SQLite from Bun with the built-in bun:sqlite module, with no npm package and no native build HOWbun:sqlite.DatabaseDatabase.queryDatabase.prepareStatement.getStatement.allStatement.runStatement.safeIntegersSQLiteErrorbun 1 MIT-0 · 2026-08-14
faraday 2.11.0: Test Faraday code against stubbed HTTP with no network, and work out which parts of Faraday 2 still need an extra gem HOWFaraday::Adapter::TestFaraday::Adapter::Test::StubsFaraday::Response::JsonFaraday::Response::RaiseErrorFaraday::ServerErrorFaraday::ResourceNotFoundruby 3 MIT-0 · 2026-08-14
guzzlehttp/guzzle 8.0.2: Test code that calls an HTTP API with Guzzle, with no network and no monkeypatching HOWGuzzleHttp.Handler.MockHandlerHandlerStack::createMiddleware::historyRequestOptions::HTTP_ERRORSGuzzleHttp.Exception.RequestExceptionGuzzleHttp.Exception.ResponseExceptionphp 8 MIT-0 · 2026-08-14
vitest 4.1.10: Run a real vitest suite with no network, and know which of its matchers disagree with each other HOWexpect.toEqualexpect.toStrictEqualexpect.rejectsexpect.toThrowvi.useFakeTimersvi.advanceTimersByTimevi.advanceTimersByTimeAsyncstartVitestnode 22 MIT-0 · 2026-08-14
plug 1.20.3: Test a Plug router end to end with Plug.Test, with no HTTP server, no socket and no network HOWPlug.Test.connPlug.Test.sent_respPlug.RouterPlug.ParsersPlug.Conn.send_respPlug.Conn.put_resp_content_typePlug.Conn.AlreadySentErrorPlug.Parsers.UnsupportedMediaTypeErrorPlug.Conn.Unfetchedelixir 1 MIT-0 · 2026-08-14
http 1.6.0: Test code that calls an HTTP API with package:http using MockClient, with no network, and see what the client actually sends and decodes HOWMockClientClient.getClient.postClient.readResponse.bodyResponse.bodyBytesRequest.bodyFieldsMultipartRequestClientExceptiondart 3 MIT-0 · 2026-08-14
clap 4.6.6: Define and test a clap 4 derive CLI across the #[clap] to #[command] and #[arg] attribute split, checking outcomes with try_parse_from and ErrorKind instead of a process HOWParser::try_parse_fromArgAction::CountCommand::buildErrorKind::UnknownArgumentErrorKind::MissingRequiredArgumentErrorKind::DisplayHelpValueEnumCommandFactory::commandrust 1 MIT-0 · 2026-08-14
anyhow 1.0.104: Handle errors in a Rust application with anyhow: attach context, keep the cause chain, log it without losing the cause, and recover the concrete error HOWanyhow::Context::contextanyhow::Context::with_contextanyhow::Error::chainanyhow::Error::root_causeanyhow::Error::downcast_refanyhow::bailanyhow::ensurerust 1 MIT-0 · 2026-08-14
orjson 3.11.9: Swap json for orjson on Alpine, without the wheel surprise or the silent output changes MIGRATIONorjson.dumpsorjson.loadsorjson.OPT_SORT_KEYSorjson.OPT_NON_STR_KEYSorjson.OPT_INDENT_2orjson.OPT_UTC_Zorjson.JSONEncodeErrororjson.JSONDecodeErrorjson.dumpspython 3.12 MIT-0 · 2026-08-14
fastapi 0.141.1: Test a FastAPI app with TestClient and no network, and assert the validation error bodies it returns HOWfastapi.testclient.TestClientfastapi.HTTPExceptionresponse_modellifespanpydantic.BaseModelhttpx2.HTTPStatusErrorstarlette.exceptions.StarletteDeprecationWarningpython 3.12 MIT-0 · 2026-08-14
github.com/shopspring/decimal v1.4.0: Hold money in shopspring/decimal without losing cents to Div, ==, or String() HOWdecimal.NewFromStringdecimal.NewFromFloatdecimal.DivisionPrecisionDecimal.EqualDecimal.QuoRemDecimal.RoundBankDecimal.StringFixedgo 1.26 MIT-0 · 2026-08-14
jose 6.2.8: Verify an HS256 JWT with jose instead of jsonwebtoken, and handle its typed errors HOWSignJWTjwtVerifyjose.errorsUnsecuredJWTdecodeJwtnode 22 MIT-0 · 2026-08-14
github.com/stretchr/testify v1.11.1: Stop a failed testify assertion from crashing the next line, and know when to use require instead of assert FIXassert.TestingTrequire.TestingTrequire.NotNilassert.NotNilassert.Equalassert.ObjectsAreEqualassert.EqualValuesassert.ElementsMatchgo 1.26 MIT-0 · 2026-08-14
express 5.1.0: Serve JSON with Express 5 on Bun, including a route parameter, a JSON body, a thrown handler and a 404 HOWexpressexpress.jsonApplication.listenbun 1 MIT-0 · 2026-08-14
esbuild 0.25.12: Run esbuild on Alpine, where the usual advice is to install a musl-specific build HOWesbuild.transform@esbuild/linux-x64node 22 MIT-0 · 2026-08-14
github.com/go-playground/validator/v10 v10.28.0: Stop go-playground/validator rejecting a supplied zero value as a missing required field FIXvalidator.NewValidate.Structvalidator.ValidationErrorsgo 1.26 MIT-0 · 2026-08-14
github.com/golang-jwt/jwt/v5 v5.3.0: Verify a JWT with golang-jwt v5 and tell an expired token apart from a forged one MIGRATIONjwt.ParseWithClaimsjwt.RegisteredClaimsjwt.ErrTokenExpiredjwt.WithIssuergo 1.26 MIT-0 · 2026-08-14
sqlalchemy 2.0.44: Move a SQLAlchemy 1.4 query to the 2.0 select API and get entities back instead of Row tuples MIGRATIONSession.executeSession.scalarsselectsqlalchemy.textDeclarativeBasepython 3.12 MIT-0 · 2026-08-14
httpx 0.28.1: Test code that calls an HTTP API with httpx, with no network and no monkeypatching HOWhttpx.MockTransporthttpx.ClientResponse.raise_for_statushttpx.WSGITransportpython 3.12 MIT-0 · 2026-08-14
monolog/monolog 3.9.0: Upgrade a Monolog handler from 2 to 3 when records became LogRecord objects MIGRATIONMonolog.LogRecordMonolog.LevelLogger::WARNINGTestHandler::hasWarningThatContainsphp 8 MIT-0 · 2026-08-14
rack 3.2.7: Fix Rack 3 rejecting response headers after an upgrade, when the app works fine on its own MIGRATIONRack::LintRack::ResponseRack::Headersruby 3 MIT-0 · 2026-08-14
decimal 3.1.1: Compare Decimal values in Elixir when == reports equal amounts as different FIXDecimal.equal?Decimal.compareDecimal.from_floatDecimal.normalizeelixir 1 MIT-0 · 2026-08-14
intl 0.20.2: Format dates in a non-English locale with intl, and parse a date without silently accepting an invalid one HOWDateFormatinitializeDateFormattingNumberFormatDateFormat.parseStrictdart 3 MIT-0 · 2026-08-14
jason 1.4.4: Decide whether the built-in JSON module in Elixir 1.18+ can replace Jason, and migrate without breaking rescue clauses MIGRATIONJSON.encode!JSON.decodeJSON.encode_to_iodata!Jason.decode!Jason.DecodeErrorJSON.DecodeErrorelixir 1 MIT-0 · 2026-08-14
csv 3.3.5: Fix LoadError for csv or base64 after a Ruby upgrade, where they used to be built FIXCSV.parseBase64.strict_encode64ruby 3 MIT-0 · 2026-08-14
crypto 3.0.7: Hash and HMAC in Dart with package:crypto, and compare the result correctly HOWsha256.convertHmacDigest.toStringdart 3 MIT-0 · 2026-08-14
nanoid 6.0.1: Import an npm package from Deno, where a bare specifier does not resolve FIXnanoidnode:crypto.createHashDeno.permissionsdeno 2 MIT-0 · 2026-08-14
nanoid 6.0.1: Run an npm package and node: builtins on Bun instead of Node HOWnanoidnode:crypto.createHashnode:fs/promises.readFilebun 1 MIT-0 · 2026-08-14
thiserror 2.0.20: Define a library error type with thiserror and keep the source chain intact HOWthiserror::ErrorsourceFromrust 1 MIT-0 · 2026-08-13
regex 1.13.1: Extract named capture groups with the regex crate, which has no backtracking HOWRegex::newcapturesnamerust 1 MIT-0 · 2026-08-13
github.com/google/go-cmp v0.7.0: Compare structs in tests where reflect.DeepEqual is wrong or unusable FIXcmp.Diffcmp.Equalcmpopts.IgnoreFieldsgo 1.26 MIT-0 · 2026-08-13
github.com/go-chi/chi/v5 v5.3.1: Read URL parameters and nest routers with go-chi HOWchi.NewRouterchi.URLParamRoutego 1.26 MIT-0 · 2026-08-13
click 8.4.2: Test a click command without spawning a subprocess HOWclick.commandclick.optionCliRunnerpython 3.12 MIT-0 · 2026-08-13
tenacity 9.1.4: Retry a flaky call with backoff and give up on the errors that will never succeed HOWretrystop_after_attemptwait_fixedretry_if_exception_typepython 3.12 MIT-0 · 2026-08-13
jinja2 3.1.6: Stop jinja2 rendering user input as raw HTML — autoescape is OFF by default FIXEnvironmentautoescapeMarkuppython 3.12 MIT-0 · 2026-08-13
fs-extra 11.4.0: Read, write and copy JSON files without hand-rolling mkdir and parse HOWfs.outputJsonfs.readJsonfs.copyfs.pathExistsnode 22 MIT-0 · 2026-08-13
picomatch 4.0.5: Exclude files from a glob match when adding a "!pattern" to the array does nothing FIXpicomatchignorenode 22 MIT-0 · 2026-08-13
es-toolkit 1.50.0: Replace lodash helpers with es-toolkit without changing behaviour MIGRATIONchunkgroupBydebouncepicknode 22 MIT-0 · 2026-08-13
fastify 5.12.0: Validate a request body with fastify's built-in JSON schema HOWfastifyroute schemaapp.injectnode 22 MIT-0 · 2026-08-13
hono 4.13.2: Serve JSON routes with hono and read typed path parameters HOWHonoc.req.paramc.jsonnode 22 MIT-0 · 2026-08-13
marked 18.0.9: Render Markdown to HTML and understand what marked does not sanitize HOWmarked.parsenode 22 MIT-0 · 2026-08-13
qs 6.15.3: Parse and build nested query strings that URLSearchParams cannot express HOWqs.parseqs.stringifynode 22 MIT-0 · 2026-08-13
decimal.js 10.6.0: Add and compare money without floating-point rounding errors FIXDecimaltoFixedequalsnode 22 MIT-0 · 2026-08-13
luxon 3.7.2: Do timezone-aware date math without the day drifting FIXDateTime.fromISOsetZonediffnode 22 MIT-0 · 2026-08-13
@tailwindcss/postcss 4.3.3: Generate CSS with tailwind v4, which replaced tailwind.config.js with CSS-first config MIGRATION@import tailwindcss@themenode 22 MIT-0 · 2026-08-13
eslint 10.8.1: Lint code with an eslint flat config after .eslintrc stopped being read MIGRATIONESLintlintTextnode 22 MIT-0 · 2026-08-13
typescript 5.9.3: Fix ts.createProgram becoming undefined after upgrading to typescript 7 MIGRATIONts.createProgramts.getPreEmitDiagnosticsts.ScriptTargetnode 22 MIT-0 · 2026-08-13
react 19.2.8: Choose between renderToString and renderToStaticMarkup without breaking hydration FIXrenderToStringrenderToStaticMarkupcreateElementnode 22 MIT-0 · 2026-08-13
serde_json 1.0.151: Serialize and deserialize a struct as JSON with serde in Rust HOWserde_json::to_stringserde_json::from_strDeserializerust 1 MIT-0 · 2026-08-13
semver 1.0.28: Check a version against a caret requirement with the semver crate in Rust HOWVersion::parseVersionReq::matchesrust 1 MIT-0 · 2026-08-13
golang.org/x/sync v0.22.0: Run concurrent work with a bound and the first error with errgroup HOWerrgroup.WithContextGroup.SetLimitGroup.Waitgo 1.26 MIT-0 · 2026-08-13
github.com/google/uuid v1.6.0: Generate, parse and validate a UUID in Go with google/uuid HOWuuid.Newuuid.Parseuuid.Validatego 1.26 MIT-0 · 2026-08-13
gopkg.in/yaml.v3 v3.0.1: Marshal and unmarshal YAML config in Go with yaml.v3 HOWyaml.Unmarshalyaml.Marshalgo 1.26 MIT-0 · 2026-08-13
pydantic 2.13.4: Replace pydantic v1 parse_obj/dict with the v2 model_validate/model_dump API MIGRATIONBaseModel.model_validateBaseModel.model_dumpValidationErrorpython 3.12 MIT-0 · 2026-08-13
python-dateutil 2.9.0.post0: Parse an ambiguous date string in Python without silently getting the wrong day FIXdateutil.parser.parserelativedeltapython 3.12 MIT-0 · 2026-08-13
packaging 26.3: Check whether a version satisfies a requirement specifier in Python HOWSpecifierSet.containsVersionpython 3.12 MIT-0 · 2026-08-13
yaml 2.9.0: Parse and re-emit YAML with the yaml package without losing types HOWYAML.parseYAML.stringifynode 22 MIT-0 · 2026-08-13
ws 8.21.3: Run a WebSocket server and client round trip with ws HOWWebSocketServerWebSocketnode 22 MIT-0 · 2026-08-13
uuid 14.0.1: Import uuid v9+ without the removed default export breaking the build FIXv4validateversionnode 22 MIT-0 · 2026-08-13
undici 8.10.0: POST JSON and read the parsed reply with undici.request HOWundici.requestbody.jsonnode 22 MIT-0 · 2026-08-13
semver 7.8.5: Check whether an installed version satisfies a semver range HOWsemver.satisfiessemver.coercesemver.majornode 22 MIT-0 · 2026-08-13
p-limit 7.3.1: Cap how many async tasks run at once with p-limit HOWpLimitnode 22 MIT-0 · 2026-08-13
pino 10.3.1: Send pino output to your own stream and read the structured fields back HOWpinonode 22 MIT-0 · 2026-08-13
nanoid 6.0.1: Generate URL-safe ids with nanoid, including a custom alphabet HOWnanoidcustomAlphabetnode 22 MIT-0 · 2026-08-13
mime 4.1.0: Look up a MIME type from a filename with mime v4 HOWmime.getTypemime.getExtensionnode 22 MIT-0 · 2026-08-13
lodash-es 4.18.1: Import single lodash functions from lodash-es in an ES module HOWchunkgroupBypicknode 22 MIT-0 · 2026-08-13
express 5.2.1: Make a rejected async route handler reach the error middleware instead of hanging the request FIXexpressapp.getapp.usenode 22 MIT-0 · 2026-08-13
date-fns 4.4.0: Format and parse an ISO date with date-fns without shifting the day HOWparseISOformatdifferenceInCalendarDaysnode 22 MIT-0 · 2026-08-13
commander 15.0.0: Parse command line options with commander without touching process.argv HOWCommandprogram.optionprogram.parsenode 22 MIT-0 · 2026-08-13
chalk 6.0.0: Make chalk emit colour codes when output is piped instead of silently producing plain text FIXChalknode 22 MIT-0 · 2026-08-13
axios 1.19.0: Tell an axios timeout apart from other request failures instead of catching a generic error FIXaxios.getnode 22 MIT-0 · 2026-08-13
axios 1.19.0: Upload a file with axios as multipart/form-data without the form-data package HOWaxios.postFormData.appendnode 22 MIT-0 · 2026-08-13
ajv 8.20.0: Fix ajv throwing "strict mode: unknown keyword" when compiling an existing JSON Schema FIXAjvajv.compilenode 22 MIT-0 · 2026-08-13
dotenv 16.6.1: process.env is undefined in an ESM module even though dotenv.config() ran and .env exists FIXdotenv.configdotenv/confignode 22 MIT-0 · 2026-08-13
express 5.1.0: Fix express 4 routes that throw "Missing parameter name" or "Unexpected ?" at startup after upgrading to express 5 FIXexpressapp.getreq.paramsreq.querynode 22 MIT-0 · 2026-08-13
p-limit 7.3.1: require() an ESM-only npm package from CommonJS without ERR_REQUIRE_ESM or ERR_REQUIRE_ASYNC_MODULE FIXYoga.Node.createimport()pLimitrequirenode 22 MIT-0 · 2026-08-13
lodash 4.18.1: Import a CommonJS-only package from an ES module without the named-export or require-is-not-defined errors FIXcreateRequireimport.meta.urllodash.chunklodash.groupBylodash.mergerequire.resolvenode 22 MIT-0 · 2026-08-13
zod 4.1.12: Validate untrusted input with a zod schema and read the error shape HOWz.objectz.stringsafeParsenode 22 MIT-0 · 2026-08-13
dayjs 1.11.19: Parse and format a UTC timestamp with dayjs without a timezone surprise HOWdayjsdayjs.extendutcnode 22 MIT-0 · 2026-08-13
express 5.1.0: Serve a JSON POST route with express and its built-in body parser HOWexpressexpress.jsonapp.postapp.listennode 22 MIT-0 · 2026-08-13
axios 1.12.2: POST a JSON body with axios and read the parsed response HOWaxios.postnode 22 MIT-0 · 2026-08-13