根据技术成熟度曲线分析，You are getting early access to this article as a subscriber. Your support makes articles like this possible. Thank you.I surveyed 112 major source-available projects to understand their AI contribution policy and whether or not they have actually accepted explicitly-labeled AI contributions. This survey included programming language implementations, databases, web browsers, programming libraries, operating systems, applications, and infrastructure projects.Of the 112 projects surveyed, only 4 banned AI contributions entirely: Zig, NetBSD, GIMP, and qemu. Some, like DuckDB and Elasticsearch, have commits by AI tools but have policies that seem to ban AI-assisted contributions. Perhaps only core contributors are trusted.Of the 112 projects surveyed, 70 had commits that explicitly mentioned being written with an AI assistant such as Claude, Gemini, Cursor, or Codex. Many more beyond those 70 projects had contribution policies that explicitly allowed AI contributions, but commits that were AI-assisted were not obvious.Across the board, low-level and high-level projects have adopted AI-assisted programming. Low-level and high-level projects have banned AI. There is not much of a pattern to be found.This survey is a good-faith attempt to determine policies and practices from public information. "Not found" in the data below basically means "no", but it's possible I just missed it. Please message me in that case.Furthermore, this survey makes no judgement at all about the use or disuse of AI, makes no judgement about having an explicit AI contribution policy, and makes no judgement about a preferred AI provider.Language ImplementationsProjectAllows AI contributionsHas accepted explicitly-labeled AI contributionsHas explicit AI contribution policyHas preferred AI providerBunYesYesNot foundClaude, CursorC# (Roslyn)Not foundNoNot foundNoCPythonYesYesYesNoGCCNot foundNoNoNoGoYesYesNoNoHaskellYesYesNot foundNoKotlinYesYesNot foundClaudeLLVMYesYesYesNoNodeJSYesNot itself, but yes via V8Not foundClaude, GeminiOCamlYesYesYesNoPerlNot foundNoNot foundNoPHPNot foundNoNot foundNoRNot foundNoNot foundNoRubyYesYesNot foundNoTypeScriptNot foundNoNot foundNoZigNoNoYesNoWeb BrowsersProjectAllows AI contributionsHas accepted explicitly-labeled AI contributionsHas explicit AI contribution policyHas preferred AI providerChromiumYesYesNot foundClaude, GeminiFirefoxYesYesYesClaude, Codex, ZedLadybirdYesYesYesNoWebkit (Safari)YesYesNot foundCodex, GeminiDatabasesProjectAllows AI contributionsHas accepted explicitly-labeled AI contributionsHas explicit AI contribution policyHas preferred AI providerCassandraNot foundNoNot foundNoChromaYesYesNot foundNoClickHouseYesYesYesClaudeCockroachDBYesYesNot foundClaudeDuckDBOnly by contributorsYesYesNoElasticsearchYesYesYes (they appear not to allow AI contributions, but they have accepted them already)NoetcdYesYesNot foundNoHadoopYesYesDisclosure is part of pull request templateNoInfluxDBYesYesNot foundClaudeKafkaYesYesNot foundNoKVRocksYesYesYesNoMariaDBYesYes (specifically)Not foundNoMeilisearchYesNoYesNoMilvusYesYesNot foundClaudeMongoDBYesYesNot foundClaudeMySQLNot foundNoNot foundNoOpensearchYesNoMight be comingNoPostgreSQLNot foundNoNot foundNoPrometheusYesYesNot foundNoQdrantYesYesYesNoRedpandaYesYesNot foundClaudeRedisYesYesNot foundNoRocksDBYesYesNot foundClaudeScyllaDBYesYesNot foundClaude (via Seastar)SparkYesYesNot foundNoSQLiteNot foundNoNot foundNoTantivyYesYesNot foundClaudeTursoYesYesNot foundClaude, CodexWeaviateYesYesNot foundClaudeOperating SystemsProjectAllows AI contributionsHas accepted explicitly-labeled AI contributionsHas explicit AI contribution policyHas preferred AI providerFreeBSDNot foundNoMight be comingNoLinuxYesYesMight be comingNoNetBSDNoNoYesNoXNU (Darwin)Not foundNoNot foundNoLibrariesProjectAllows AI contributionsHas accepted explicitly-labeled AI contributionsHas explicit AI contribution policyHas preferred AI providerASP.NETNot foundNoNot foundNocurlYesNoYesNoDataFusionYesYesYesNoDjangoYesYesYesNoFastAPIYesYesYesNoFFmpegNot foundNoNot foundNogRPCNot foundNoNot foundGeminiJAXYesYesYesNollama.cppYes (AI-assisted)YesYesClaude, GeminiliburingYesYesNot foundNokerasYesYesNot foundGeminiNettyNot foundNoNot foundNonext.jsYesYesNot foundClaude, CursoropenSSLYesYesMight be comingNoPandasYesYesYesNoPolarsYesYesYesNoprismaYesYesNot foundClaude, GeminipydanticNot foundNoNot official but seemingly againstNoPytorchYesYesYesClaudeReactYesYesNot foundClaudeSpring BootNot foundNoNot foundNosvelteYesYesNot foundNotokioYesYesNot foundNothree.jsYesYesNot foundNouvYesYesNot foundClaudevLLMYesYesNot foundGeminivue.jsNot foundNoNot foundNoApplicationsProjectAllows AI contributionsHas accepted explicitly-labeled AI contributionsHas explicit AI contribution policyHas preferred AI providerAudacityNot foundNoNot foundNoBlenderYes, for GSoC at leastNoMight be comingNoDarktableNot foundNoNot foundNoDrupalYesNoYesNoGiteaYesYesYesClaudeGitLabYesYesYesNoGIMPNoNoYes, for students at leastNoLibreOfficeNot foundNoNot foundNoMatomoNot foundNoNot foundNoMattermostYesYesNot foundClaudeOBS StudioNot foundNoYesNopi-holeNot foundNoNot foundNoThunderbirdNot foundNoNot foundNoVSCodeYesYesNot foundClaudeWordpressNot foundNoYesClaudeZulipYesYesYesClaudeInfrastructureProjectAllows AI contributionsHas accepted explicitly-labeled AI contributionsHas explicit AI contribution policyHas preferred AI providerCaddyYesYesYesNoCephYesYesNot foundNociliumYesYesNot foundNoenvoyYesYesYesNohaproxyNot foundNoNot foundNoIstioYesYesMight be comingNojaegerYesYesNot foundClaudeKeycloakYesYesNot foundNoKubernetesYesYesYesNomoby (Docker)YesYesNot foundNonginxNot foundNoNot foundNoOpen Policy AgentNot foundNoNot foundClaudeopenzfsYesYesNot foundNoqemuNoNoYesNosystemdYesYesYesNotraefikNot foundNoNot foundNoVaultNot foundNoNot foundNo