Ensure spawn order is consistent

Test that task properly unrefs its table
Add sleep test
2025-06-27 04:29:11 +10:00 · 2025-06-27 04:24:10 +10:00 · 2025-06-27 04:11:31 +10:00 · 2025-06-27 04:06:45 +10:00 · 2025-06-27 04:06:35 +10:00 · 2025-06-27 03:53:08 +10:00
46 changed files with 2691 additions and 638 deletions
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,3 +1,2 @@
 [build]
 rustflags = ["--cfg", "tokio_unstable"]
-rustdocflags = ["--cfg", "tokio_unstable"]
--- a/.luarc.json
+++ b/.luarc.json
@@ -1,5 +1,9 @@
 {
  "$schema": "https://raw.githubusercontent.com/LuaLS/vscode-lua/master/setting/schema.json",
  "runtime.version": "LuaJIT",
-  "diagnostics.disable": ["redefined-local", "lowercase-global"]
+  "diagnostics.disable": [
+    "undefined-global",
+    "redefined-local",
+    "lowercase-global"
+  ]
 }
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -255,6 +255,32 @@ name = "camino"
 version = "1.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0da45bc31171d8d6960122e222a67740df867c1dd53b4d51caa297084c185cab"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "cargo-platform"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e35af189006b9c0f00a064685c727031e3ed2d8020f7ba284d78cc2671bd36ea"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "cargo_metadata"
+version = "0.19.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd5eb614ed4c27c5d706420e4320fbe3216ab31fa1c33cd8246ac36dae4479ba"
+dependencies = [
+ "camino",
+ "cargo-platform",
+ "semver",
+ "serde",
+ "serde_json",
+ "thiserror",
+]

 [[package]]
 name = "cc"
@@ -262,6 +288,8 @@ version = "1.2.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d487aa071b5f64da6f19a3e848e3578944b726ee5a4854b82172f02aa876bfdc"
 dependencies = [
+ "jobserver",
+ "libc",
 "shlex",
 ]

@@ -444,6 +472,46 @@ dependencies = [
 "syn",
 ]

+[[package]]
+name = "deranged"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c9e6a11ca8224451684bc0d7d5a7adbf8f2fd6887261a1cfc3c0432f9d4068e"
+dependencies = [
+ "powerfmt",
+]
+
+[[package]]
+name = "derive_builder"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "507dfb09ea8b7fa618fcf76e953f4f5e192547945816d5358edffe39f6f94947"
+dependencies = [
+ "derive_builder_macro",
+]
+
+[[package]]
+name = "derive_builder_core"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d5bcf7b024d6835cfb3d473887cd966994907effbe9227e8c8219824d06c4e8"
+dependencies = [
+ "darling",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "derive_builder_macro"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab63b0e2bf4d5928aff72e83a7dace85d7bba5fe12dcc3c5a572d78caffd3f3c"
+dependencies = [
+ "derive_builder_core",
+ "syn",
+]
+
 [[package]]
 name = "derive_more"
 version = "2.0.1"
@@ -466,6 +534,23 @@ dependencies = [
 "unicode-xid",
 ]

+[[package]]
+name = "diff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
+
+[[package]]
+name = "displaydoc"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "either"
 version = "1.15.0"
@@ -494,6 +579,12 @@ dependencies = [
 "windows-sys 0.60.2",
 ]

+[[package]]
+name = "fastrand"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
+
 [[package]]
 name = "flate2"
 version = "1.1.2"
@@ -510,6 +601,15 @@ version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"

+[[package]]
+name = "form_urlencoded"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e13624c2627564efccf4934284bdd98cbaa14e79b0b5a141218e507b3a823456"
+dependencies = [
+ "percent-encoding",
+]
+
 [[package]]
 name = "futures-channel"
 version = "0.3.31"
@@ -557,7 +657,19 @@ checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
 "cfg-if",
 "libc",
- "wasi",
+ "wasi 0.11.1+wasi-snapshot-preview1",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi",
+ "wasi 0.14.2+wasi-0.2.4",
 ]

 [[package]]
@@ -566,12 +678,38 @@ version = "0.31.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"

+[[package]]
+name = "git2"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2deb07a133b1520dc1a5690e9bd08950108873d7ed5de38dcc74d3b5ebffa110"
+dependencies = [
+ "bitflags",
+ "libc",
+ "libgit2-sys",
+ "log",
+ "url",
+]
+
 [[package]]
 name = "glob"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8d1add55171497b4705a648c6b583acafb01d58050a51727785f0b2c8e0a2b2"

+[[package]]
+name = "globset"
+version = "0.4.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54a1028dfc5f5df5da8a56a73e6c153c9a9708ec57232470703592a3f18e49f5"
+dependencies = [
+ "aho-corasick",
+ "bstr",
+ "log",
+ "regex-automata 0.4.9",
+ "regex-syntax 0.8.5",
+]
+
 [[package]]
 name = "h2"
 version = "0.4.10"
@@ -729,12 +867,119 @@ dependencies = [
 "tracing",
 ]

+[[package]]
+name = "icu_collections"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "200072f5d0e3614556f94a9930d5dc3e0662a652823904c3a75dc3b0af7fee47"
+dependencies = [
+ "displaydoc",
+ "potential_utf",
+ "yoke",
+ "zerofrom",
+ "zerovec",
+]
+
+[[package]]
+name = "icu_locale_core"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0cde2700ccaed3872079a65fb1a78f6c0a36c91570f28755dda67bc8f7d9f00a"
+dependencies = [
+ "displaydoc",
+ "litemap",
+ "tinystr",
+ "writeable",
+ "zerovec",
+]
+
+[[package]]
+name = "icu_normalizer"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "436880e8e18df4d7bbc06d58432329d6458cc84531f7ac5f024e93deadb37979"
+dependencies = [
+ "displaydoc",
+ "icu_collections",
+ "icu_normalizer_data",
+ "icu_properties",
+ "icu_provider",
+ "smallvec",
+ "zerovec",
+]
+
+[[package]]
+name = "icu_normalizer_data"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00210d6893afc98edb752b664b8890f0ef174c8adbb8d0be9710fa66fbbf72d3"
+
+[[package]]
+name = "icu_properties"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "016c619c1eeb94efb86809b015c58f479963de65bdb6253345c1a1276f22e32b"
+dependencies = [
+ "displaydoc",
+ "icu_collections",
+ "icu_locale_core",
+ "icu_properties_data",
+ "icu_provider",
+ "potential_utf",
+ "zerotrie",
+ "zerovec",
+]
+
+[[package]]
+name = "icu_properties_data"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "298459143998310acd25ffe6810ed544932242d3f07083eee1084d83a71bd632"
+
+[[package]]
+name = "icu_provider"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03c80da27b5f4187909049ee2d72f276f0d9f99a42c306bd0131ecfe04d8e5af"
+dependencies = [
+ "displaydoc",
+ "icu_locale_core",
+ "stable_deref_trait",
+ "tinystr",
+ "writeable",
+ "yoke",
+ "zerofrom",
+ "zerotrie",
+ "zerovec",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"

+[[package]]
+name = "idna"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "686f825264d630750a544639377bae737628043f20d38bbc029e8f29ea968a7e"
+dependencies = [
+ "idna_adapter",
+ "smallvec",
+ "utf8_iter",
+]
+
+[[package]]
+name = "idna_adapter"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3acae9609540aa318d1bc588455225fb2085b9ed0c4f6bd0d9d5bcd86f1a0344"
+dependencies = [
+ "icu_normalizer",
+ "icu_properties",
+]
+
 [[package]]
 name = "indexmap"
 version = "1.9.3"
@@ -785,6 +1030,16 @@ version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"

+[[package]]
+name = "jobserver"
+version = "0.1.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38f262f097c174adebe41eb73d66ae9c06b2844fb0da69969647bbddd9b0538a"
+dependencies = [
+ "getrandom 0.3.3",
+ "libc",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -793,15 +1048,17 @@ checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"

 [[package]]
 name = "lb"
-version = "0.1.0"
+version = "0.0.1"
 dependencies = [
- "camino",
 "derive_more",
+ "globset",
 "luaffi",
- "luaify",
 "luajit",
 "sysexits",
+ "tempfile",
+ "thiserror",
 "tokio",
+ "walkdir",
 ]

 [[package]]
@@ -810,6 +1067,18 @@ version = "0.2.174"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"

+[[package]]
+name = "libgit2-sys"
+version = "0.18.2+1.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c42fe03df2bd3c53a3a9c7317ad91d80c81cd1fb0caec8d7cc4cd2bfa10c222"
+dependencies = [
+ "cc",
+ "libc",
+ "libz-sys",
+ "pkg-config",
+]
+
 [[package]]
 name = "libloading"
 version = "0.8.8"
@@ -830,6 +1099,18 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "libz-sys"
+version = "1.1.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b70e7a7df205e92a1a4cd9aaae7898dac0aa555503cc0a649494d0d60e7651d"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.9.4"
@@ -837,14 +1118,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cd945864f07fe9f5371a27ad7b52a172b4b499999f1d97574c9fa68373937e12"

 [[package]]
-name = "lock_api"
-version = "0.4.13"
+name = "litemap"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96936507f153605bddfcda068dd804796c84324ed2510809e5b2a624c81da765"
-dependencies = [
- "autocfg",
- "scopeguard",
-]
+checksum = "241eaef5fd12c88705a01fc1066c48c4b36e0dd4377dcdc7ec3942cea7a69956"

 [[package]]
 name = "log"
@@ -854,7 +1131,7 @@ checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"

 [[package]]
 name = "luaffi"
-version = "0.1.0"
+version = "0.0.1"
 dependencies = [
 "bstr",
 "luaffi_impl",
@@ -865,7 +1142,7 @@ dependencies = [

 [[package]]
 name = "luaffi_impl"
-version = "0.1.0"
+version = "0.0.1"
 dependencies = [
 "darling",
 "proc-macro2",
@@ -875,8 +1152,9 @@ dependencies = [

 [[package]]
 name = "luaify"
-version = "0.1.0"
+version = "0.0.1"
 dependencies = [
+ "pretty_assertions",
 "proc-macro2",
 "quote",
 "syn",
@@ -884,7 +1162,7 @@ dependencies = [

 [[package]]
 name = "luajit"
-version = "0.1.0"
+version = "0.0.1"
 dependencies = [
 "bitflags",
 "bstr",
@@ -895,7 +1173,7 @@ dependencies = [

 [[package]]
 name = "luajit-sys"
-version = "0.1.0"
+version = "0.0.1"
 dependencies = [
 "bindgen",
 "cc",
@@ -904,7 +1182,7 @@ dependencies = [

 [[package]]
 name = "luby"
-version = "0.1.0"
+version = "0.0.1"
 dependencies = [
 "clap",
 "console-subscriber",
@@ -916,6 +1194,7 @@ dependencies = [
 "tokio",
 "tracing",
 "tracing-subscriber",
+ "vergen-git2",
 ]

 [[package]]
@@ -976,7 +1255,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78bed444cc8a2160f01cbcf811ef18cac863ad68ae8ca62092e8db51d51c761c"
 dependencies = [
 "libc",
- "wasi",
+ "wasi 0.11.1+wasi-snapshot-preview1",
 "windows-sys 0.59.0",
 ]

@@ -1000,6 +1279,12 @@ dependencies = [
 "winapi",
 ]

+[[package]]
+name = "num-conv"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -1009,6 +1294,15 @@ dependencies = [
 "autocfg",
 ]

+[[package]]
+name = "num_threads"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c7398b9c8b70908f6371f47ed36737907c87c52af34c268fed0bf0ceb92ead9"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "object"
 version = "0.36.7"
@@ -1038,32 +1332,9 @@ checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"

 [[package]]
 name = "owo-colors"
-version = "4.2.1"
+version = "4.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26995317201fa17f3656c36716aed4a7c81743a9634ac4c99c0eeda495db0cec"
-
-[[package]]
-name = "parking_lot"
-version = "0.12.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "70d58bf43669b5795d1576d0641cfb6fbb2057bf629506267a92807158584a13"
-dependencies = [
- "lock_api",
- "parking_lot_core",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.9.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc838d2a56b5b1a6c25f55575dfc605fabb63bb2365f6c2353ef9159aa69e4a5"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "smallvec",
- "windows-targets 0.52.6",
-]
+checksum = "48dd4f4a2c8405440fd0462561f0e5806bd0f77e86f51c761481bdd4018b545e"

 [[package]]
 name = "percent-encoding"
@@ -1103,6 +1374,27 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"

+[[package]]
+name = "pkg-config"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7edddbd0b52d732b21ad9a5fab5c704c14cd949e5e9a1ec5929a24fded1b904c"
+
+[[package]]
+name = "potential_utf"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5a7c30837279ca13e7c867e9e40053bc68740f988cb07f7ca6df43cc734b585"
+dependencies = [
+ "zerovec",
+]
+
+[[package]]
+name = "powerfmt"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -1112,6 +1404,16 @@ dependencies = [
 "zerocopy",
 ]

+[[package]]
+name = "pretty_assertions"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ae130e2f271fbc2ac3a40fb1d07180839cdbbe443c7a27e1e3c13c5cac0116d"
+dependencies = [
+ "diff",
+ "yansi",
+]
+
 [[package]]
 name = "prettyplease"
 version = "0.2.35"
@@ -1172,6 +1474,12 @@ dependencies = [
 "proc-macro2",
 ]

+[[package]]
+name = "r-efi"
+version = "5.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
+
 [[package]]
 name = "rand"
 version = "0.8.5"
@@ -1199,16 +1507,7 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom",
-]
-
-[[package]]
-name = "redox_syscall"
-version = "0.5.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d04b7d0ee6b4a0207a0a7adb104d23ecb0b47d6beae7152d0fa34b692b29fd6"
-dependencies = [
- "bitflags",
+ "getrandom 0.2.16",
 ]

 [[package]]
@@ -1267,6 +1566,15 @@ version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"

+[[package]]
+name = "rustc_version"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfcb3a22ef46e85b45de6ee7e79d063319ebb6594faafcf1c225ea92ab6e9b92"
+dependencies = [
+ "semver",
+]
+
 [[package]]
 name = "rustix"
 version = "1.0.7"
@@ -1293,10 +1601,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"

 [[package]]
-name = "scopeguard"
-version = "1.2.0"
+name = "same-file"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "semver"
+version = "1.0.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56e6fa9c48d24d85fb3de5ad847117517440f6beceb7798af16b4a87d616b8d0"
+dependencies = [
+ "serde",
+]

 [[package]]
 name = "serde"
@@ -1345,15 +1665,6 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"

-[[package]]
-name = "signal-hook-registry"
-version = "1.4.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9203b8055f63a2a00e2f593bb0510367fe707d7ff1e5c872de2f537b339e5410"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "simdutf8"
 version = "0.1.5"
@@ -1382,6 +1693,12 @@ dependencies = [
 "windows-sys 0.52.0",
 ]

+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
 [[package]]
 name = "strsim"
 version = "0.11.1"
@@ -1405,12 +1722,36 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0bf256ce5efdfa370213c1dabab5935a12e49f2c58d15e9eac2870d3b4f27263"

+[[package]]
+name = "synstructure"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "728a70f3dbaf5bab7f0c4b1ac8d7ae5ea60a4b5549c8a5914361c99147a709d2"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "sysexits"
 version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "198f60d1f7f003f168507691e42d082df109ef0f05c6fd006e22528371a5f1b4"

+[[package]]
+name = "tempfile"
+version = "3.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8a64e3985349f2441a1a9ef0b853f869006c3855f2cda6862a94d26ebb9d6a1"
+dependencies = [
+ "fastrand",
+ "getrandom 0.3.3",
+ "once_cell",
+ "rustix",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "thiserror"
 version = "2.0.12"
@@ -1440,6 +1781,49 @@ dependencies = [
 "cfg-if",
 ]

+[[package]]
+name = "time"
+version = "0.3.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a7619e19bc266e0f9c5e6686659d394bc57973859340060a69221e57dbc0c40"
+dependencies = [
+ "deranged",
+ "itoa",
+ "libc",
+ "num-conv",
+ "num_threads",
+ "powerfmt",
+ "serde",
+ "time-core",
+ "time-macros",
+]
+
+[[package]]
+name = "time-core"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9e9a38711f559d9e3ce1cdb06dd7c5b8ea546bc90052da6d06bb76da74bb07c"
+
+[[package]]
+name = "time-macros"
+version = "0.2.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3526739392ec93fd8b359c8e98514cb3e8e021beb4e5f597b00a0221f8ed8a49"
+dependencies = [
+ "num-conv",
+ "time-core",
+]
+
+[[package]]
+name = "tinystr"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d4f6d1145dcb577acf783d4e601bc1d76a13337bb54e6233add580b07344c8b"
+dependencies = [
+ "displaydoc",
+ "zerovec",
+]
+
 [[package]]
 name = "tokio"
 version = "1.45.1"
@@ -1450,9 +1834,7 @@ dependencies = [
 "bytes",
 "libc",
 "mio",
- "parking_lot",
 "pin-project-lite",
- "signal-hook-registry",
 "socket2",
 "tokio-macros",
 "tracing",
@@ -1655,6 +2037,23 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"

+[[package]]
+name = "url"
+version = "2.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32f8b686cadd1473f4bd0117a5d28d36b1ade384ea9b5069a1c40aefed7fda60"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+]
+
+[[package]]
+name = "utf8_iter"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
+
 [[package]]
 name = "utf8parse"
 version = "0.2.2"
@@ -1667,6 +2066,63 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"

+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
+[[package]]
+name = "vergen"
+version = "9.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b2bf58be11fc9414104c6d3a2e464163db5ef74b12296bda593cac37b6e4777"
+dependencies = [
+ "anyhow",
+ "cargo_metadata",
+ "derive_builder",
+ "regex",
+ "rustc_version",
+ "rustversion",
+ "vergen-lib",
+]
+
+[[package]]
+name = "vergen-git2"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f6ee511ec45098eabade8a0750e76eec671e7fb2d9360c563911336bea9cac1"
+dependencies = [
+ "anyhow",
+ "derive_builder",
+ "git2",
+ "rustversion",
+ "time",
+ "vergen",
+ "vergen-lib",
+]
+
+[[package]]
+name = "vergen-lib"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b07e6010c0f3e59fcb164e0163834597da68d1f864e2b8ca49f74de01e9c166"
+dependencies = [
+ "anyhow",
+ "derive_builder",
+ "rustversion",
+]
+
+[[package]]
+name = "walkdir"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
 [[package]]
 name = "want"
 version = "0.3.1"
@@ -1682,6 +2138,15 @@ version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"

+[[package]]
+name = "wasi"
+version = "0.14.2+wasi-0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9683f9a5a998d873c0d21fcbe3c083009670149a8fab228644b8bd36b2c48cb3"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
 [[package]]
 name = "which"
 version = "8.0.0"
@@ -1709,6 +2174,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"

+[[package]]
+name = "winapi-util"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
+dependencies = [
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
@@ -1876,6 +2350,51 @@ version = "0.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d135d17ab770252ad95e9a872d365cf3090e3be864a34ab46f48555993efc904"

+[[package]]
+name = "wit-bindgen-rt"
+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "writeable"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea2f10b9bb0928dfb1b42b65e1f9e36f7f54dbdf08457afefb38afcdec4fa2bb"
+
+[[package]]
+name = "yansi"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfe53a6657fd280eaa890a3bc59152892ffa3e30101319d168b781ed6529b049"
+
+[[package]]
+name = "yoke"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f41bb01b8226ef4bfd589436a297c53d118f65921786300e427be8d487695cc"
+dependencies = [
+ "serde",
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38da3c9736e16c5d3c8c597a9aaa5d1fa565d0532ae05e27c24aa62fb32c0ab6"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
 [[package]]
 name = "zerocopy"
 version = "0.8.26"
@@ -1895,3 +2414,57 @@ dependencies = [
 "quote",
 "syn",
 ]
+
+[[package]]
+name = "zerofrom"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5"
+dependencies = [
+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerotrie"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36f0bbd478583f79edad978b407914f61b2972f5af6fa089686016be8f9af595"
+dependencies = [
+ "displaydoc",
+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a05eb080e015ba39cc9e23bbe5e7fb04d5fb040350f99f34e338d5fdd294428"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b96237efa0c878c64bd89c436f661be4e46b2f3eff1ebb976f7ef2321d2f58f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,4 +1,5 @@
 [workspace]
+resolver = "3"
 members = [
    "crates/lb",
    "crates/luaffi",
@@ -8,23 +9,49 @@ members = [
    "crates/luajit-sys",
 ]

+[workspace.package]
+version = "0.0.1"
+edition = "2024"
+license = "MIT"
+authors = ["luaneko <lumi@lua.re>"]
+homepage = "https://git.lua.re/luaneko/luby/"
+repository = "https://git.lua.re/luaneko/luby/"
+
+[package]
+name = "luby"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true
+
 [profile]
 dev.panic = "abort"
 release.panic = "abort"

-[package]
-name = "luby"
-version = "0.1.0"
-edition = "2024"
+[[test]]
+name = "main"
+harness = false
+
+[features]
+default = ["task", "fs", "net"]
+task = ["lb/task"]
+fs = ["lb/fs"]
+net = ["lb/net"]
+tokio-console = ["dep:console-subscriber"]

 [dependencies]
-clap = { version = "4.5.40", features = ["derive"] }
-console-subscriber = "0.4.1"
-lb = { version = "0.1.0", path = "crates/lb" }
-luajit = { version = "0.1.0", path = "crates/luajit", features = ["runtime"] }
+clap = { version = "4.5.40", features = ["derive", "env"] }
+console-subscriber = { version = "0.4.1", optional = true }
+lb = { path = "crates/lb" }
+luajit = { path = "crates/luajit", features = ["runtime"] }
 mimalloc = "0.1.47"
 owo-colors = "4.2.1"
 sysexits = "0.9.0"
-tokio = { version = "1.45.1", features = ["full", "tracing"] }
+tokio = { version = "1.45.1", features = ["rt", "rt-multi-thread"] }
 tracing = "0.1.41"
-tracing-subscriber = "0.3.19"
+tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
+
+[build-dependencies]
+vergen-git2 = { version = "1.0.7", features = ["cargo", "rustc"] }
--- a/bacon.toml
+++ b/bacon.toml
@@ -1,7 +1,3 @@
-[jobs.test]
-command = ["cargo", "test", "--workspace"]
-need_stdout = true
-
 [jobs.doc]
 command = ["cargo", "doc", "--workspace"]

--- a/build.rs
+++ b/build.rs
@@ -0,0 +1,13 @@
+use vergen_git2::{CargoBuilder, Emitter, Git2Builder, RustcBuilder};
+
+fn main() {
+    Emitter::default()
+        .add_instructions(&CargoBuilder::all_cargo().unwrap())
+        .unwrap()
+        .add_instructions(&Git2Builder::all_git().unwrap())
+        .unwrap()
+        .add_instructions(&RustcBuilder::all_rustc().unwrap())
+        .unwrap()
+        .emit()
+        .unwrap();
+}
--- a/crates/lb/Cargo.toml
+++ b/crates/lb/Cargo.toml
@@ -1,16 +1,24 @@
 [package]
 name = "lb"
-version = "0.1.0"
-edition = "2024"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true
+
+[features]
+task = ["tokio/rt", "tokio/time"]
+fs = ["tokio/fs", "dep:walkdir", "dep:globset", "dep:tempfile"]
+net = ["tokio/net"]

 [dependencies]
-camino = "1.1.10"
 derive_more = { version = "2.0.1", features = ["full"] }
-luaffi = { version = "0.1.0", path = "../luaffi" }
-luajit = { version = "0.1.0", path = "../luajit" }
+globset = { version = "0.4.16", optional = true }
+luaffi = { path = "../luaffi" }
+luajit = { path = "../luajit" }
 sysexits = "0.9.0"
-tokio = { version = "1.45.1", features = ["rt", "time", "fs", "net", "process", "signal"] }
-
-[dev-dependencies]
-luaify = { path = "../luaify" }
-tokio = { version = "1.45.1", features = ["full"] }
+tempfile = { version = "3.20.0", optional = true }
+thiserror = "2.0.12"
+tokio = { version = "1.45.1" }
+walkdir = { version = "2.5.0", optional = true }
--- a/crates/lb/src/channel.rs
+++ b/crates/lb/src/channel.rs
@@ -1,11 +1,26 @@
-// use flume::{Receiver, Sender};
+//! Channel library
+//!
+//! The `lb:chan` library provides primitives for asynchronous communication between tasks via
+//! message passing channels.
+//!
+//! ## Exports
+//!
+//! See [`lb_chanlib`] for items exported by this library.
 use luaffi::{cdef, metatype};

-#[cdef]
-pub struct lb_libchannel;
+/// Items exported by the `lb:chan` library.
+///
+/// This library can be acquired by calling
+/// [`require("lb:chan")`](https://www.lua.org/manual/5.1/manual.html#pdf-require) in Lua.
+///
+/// ```lua
+/// local chan = require("lb:chan");
+/// ```
+#[cdef(module = "lb:chan")]
+pub struct lb_chanlib;

 #[metatype]
-impl lb_libchannel {
+impl lb_chanlib {
    #[new]
    extern "Lua-C" fn new() -> Self {
        Self
--- a/crates/lb/src/fs.rs
+++ b/crates/lb/src/fs.rs
@@ -1,32 +1,428 @@
-//! The `lb:fs` module provides utilities for interacting with the file system asynchronously.
+//! # Filesystem library
 //!
-//! See [`lb_libfs`] for items exported by this module.
+//! The `lb:fs` library provides synchronous and asynchronous utilities for interacting with the
+//! filesystem.
+//!
+//! ## Asynchronous by default
+//!
+//! Filesystem operations are blocking by nature; to provide asynchronicity, luby performs blocking
+//! operations in a background thread pool by default. Synchronous complements to all asynchronous
+//! functions are always provided.
+//!
+//! ## Exports
+//!
+//! See [`lb_fslib`] for items exported by this library.
+use derive_more::From;
 use luaffi::{cdef, metatype};
-use std::io;
-use tokio::fs;
+use std::{path::PathBuf, time::SystemTime};
+use thiserror::Error;

-/// Items exported by the `lb:fs` module.
+/// Errors that can be thrown by this library.
 ///
-/// This module can be obtained by calling `require` in Lua.
+/// Functions which return this error will **throw** in Lua. The error message can be caught by
+/// using [`pcall(f, ...)`](https://www.lua.org/manual/5.1/manual.html#pdf-pcall).
+#[derive(Debug, Error)]
+pub enum Error {
+    /// I/O error.
+    #[error("{0}")]
+    Io(#[from] std::io::Error),
+    /// Walk directory error.
+    #[error("{0}")]
+    Walk(#[from] walkdir::Error),
+    /// Glob pattern error.
+    #[error("{0}")]
+    Glob(#[from] globset::Error),
+}
+
+type Result<T> = std::result::Result<T, Error>;
+
+/// Items exported by the `lb:fs` library.
+///
+/// This library can be acquired by calling `require` in Lua.
 ///
 /// ```lua
 /// local fs = require("lb:fs");
 /// ```
-#[cdef]
-pub struct lb_libfs;
+#[cdef(module = "lb:fs")]
+pub struct lb_fslib;

 #[metatype]
-impl lb_libfs {
+impl lb_fslib {
    #[new]
    extern "Lua-C" fn new() -> Self {
        Self
    }

-    pub extern "Lua" fn read(&self, path: string) -> string {
-        self.__read(path)
+    pub async extern "Lua-C" fn read(&self, path: &str) -> Result<Vec<u8>> {
+        Ok(tokio::fs::read(path).await?)
    }

-    async extern "Lua-C" fn __read(&self, path: &str) -> io::Result<Vec<u8>> {
-        fs::read(path).await
+    pub extern "Lua-C" fn read_sync(&self, path: &str) -> Result<Vec<u8>> {
+        Ok(std::fs::read(path)?)
+    }
+
+    pub async extern "Lua-C" fn write(&self, path: &str, contents: &[u8]) -> Result<()> {
+        Ok(tokio::fs::write(path, contents).await?)
+    }
+
+    pub extern "Lua-C" fn write_sync(&self, path: &str, contents: &[u8]) -> Result<()> {
+        Ok(std::fs::write(path, contents)?)
+    }
+
+    pub async extern "Lua-C" fn read_dir(&self, path: &str) -> Result<lb_read_dir> {
+        Ok(tokio::fs::read_dir(path).await?.into())
+    }
+
+    pub extern "Lua-C" fn read_dir_sync(&self, path: &str) -> Result<lb_read_dir_sync> {
+        Ok(std::fs::read_dir(path)?.into())
+    }
+
+    pub extern "Lua-C" fn walk_dir(&self, path: &str) -> lb_walk_dir {
+        walkdir::WalkDir::new(path).into_iter().into()
+    }
+
+    pub extern "Lua-C" fn glob(&self, pattern: &str) -> Result<lb_glob_dir> {
+        self.glob_dir(".", pattern)
+    }
+
+    pub extern "Lua-C" fn glob_dir(&self, path: &str, pattern: &str) -> Result<lb_glob_dir> {
+        let prefix = PathBuf::from(path);
+        let iter = walkdir::WalkDir::new(path).min_depth(1).into_iter();
+        let matcher = globset::GlobSet::builder()
+            .add(globset::Glob::new(pattern)?)
+            .build()?;
+
+        Ok(lb_glob_dir {
+            iter,
+            matcher,
+            prefix,
+        })
+    }
+
+    pub extern "Lua-C" fn temp_dir(&self) -> Result<lb_temp_dir> {
+        Ok(tempfile::tempdir()?.into())
+    }
+
+    pub extern "Lua-C" fn temp_dir_in(&self, path: &str) -> Result<lb_temp_dir> {
+        Ok(tempfile::tempdir_in(path)?.into())
+    }
+}
+
+/// Iterator over the entries in a directory.
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_read_dir(#[opaque] tokio::fs::ReadDir);
+
+#[metatype]
+impl lb_read_dir {
+    #[call]
+    pub async extern "Lua-C" fn next(&mut self) -> Result<Option<lb_dir_entry>> {
+        Ok(self.0.next_entry().await?.map(Into::into))
+    }
+}
+
+/// Synchronous version of [`lb_read_dir`].
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_read_dir_sync(#[opaque] std::fs::ReadDir);
+
+#[metatype]
+impl lb_read_dir_sync {
+    #[call]
+    pub extern "Lua-C" fn next(&mut self) -> Result<Option<lb_dir_entry_sync>> {
+        Ok(self.0.next().transpose()?.map(Into::into))
+    }
+}
+
+/// Entry inside of a directory on the filesystem.
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_dir_entry(#[opaque] tokio::fs::DirEntry);
+
+#[metatype]
+impl lb_dir_entry {
+    pub extern "Lua-C" fn path(&self) -> String {
+        self.0.path().to_string_lossy().into()
+    }
+
+    pub extern "Lua-C" fn name(&self) -> String {
+        self.0.file_name().to_string_lossy().into()
+    }
+
+    pub async extern "Lua-C" fn r#type(&self) -> Result<lb_file_type> {
+        Ok(self.0.file_type().await?.into())
+    }
+
+    pub async extern "Lua-C" fn metadata(&self) -> Result<lb_file_meta> {
+        Ok(self.0.metadata().await?.into())
+    }
+
+    #[cfg(unix)]
+    pub extern "Lua-C" fn ino(&self) -> u64 {
+        self.0.ino()
+    }
+
+    #[tostring]
+    pub extern "Lua" fn tostring(&self) -> String {
+        self.path()
+    }
+}
+
+/// Synchronous version of [`lb_dir_entry`].
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_dir_entry_sync(#[opaque] std::fs::DirEntry);
+
+#[metatype]
+impl lb_dir_entry_sync {
+    pub extern "Lua-C" fn path(&self) -> String {
+        self.0.path().to_string_lossy().into()
+    }
+
+    pub extern "Lua-C" fn name(&self) -> String {
+        self.0.file_name().to_string_lossy().into()
+    }
+
+    pub extern "Lua-C" fn r#type(&self) -> Result<lb_file_type> {
+        Ok(self.0.file_type()?.into())
+    }
+
+    pub extern "Lua-C" fn metadata(&self) -> Result<lb_file_meta> {
+        Ok(self.0.metadata()?.into())
+    }
+
+    #[cfg(unix)]
+    pub extern "Lua-C" fn ino(&self) -> u64 {
+        use std::os::unix::fs::DirEntryExt;
+        self.0.ino()
+    }
+
+    #[tostring]
+    pub extern "Lua" fn tostring(&self) -> String {
+        self.path()
+    }
+}
+
+/// Structure representing the type of a file with accessors for each file type.
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_file_type(#[opaque] std::fs::FileType);
+
+#[metatype]
+impl lb_file_type {
+    pub extern "Lua-C" fn is_dir(&self) -> bool {
+        self.0.is_dir()
+    }
+
+    pub extern "Lua-C" fn is_file(&self) -> bool {
+        self.0.is_file()
+    }
+
+    pub extern "Lua-C" fn is_symlink(&self) -> bool {
+        self.0.is_file()
+    }
+
+    #[tostring]
+    pub extern "Lua-C" fn tostring(&self) -> String {
+        if self.0.is_file() {
+            "file"
+        } else if self.0.is_dir() {
+            "dir"
+        } else if self.0.is_symlink() {
+            "symlink"
+        } else {
+            "other"
+        }
+        .into()
+    }
+}
+
+/// Metadata information about a file.
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_file_meta(#[opaque] std::fs::Metadata);
+
+#[metatype]
+impl lb_file_meta {
+    pub extern "Lua-C" fn is_dir(&self) -> bool {
+        self.0.is_dir()
+    }
+
+    pub extern "Lua-C" fn is_file(&self) -> bool {
+        self.0.is_file()
+    }
+
+    pub extern "Lua-C" fn is_symlink(&self) -> bool {
+        self.0.is_file()
+    }
+
+    pub extern "Lua-C" fn r#type(&self) -> lb_file_type {
+        self.0.file_type().into()
+    }
+
+    pub extern "Lua-C" fn size(&self) -> u64 {
+        self.0.len()
+    }
+
+    pub extern "Lua-C" fn perms(&self) -> lb_file_perms {
+        self.0.permissions().into()
+    }
+
+    pub extern "Lua-C" fn created(&self) -> Result<f64> {
+        Ok(self
+            .0
+            .created()?
+            .duration_since(SystemTime::UNIX_EPOCH)
+            .map(|dur| dur.as_secs_f64())
+            .unwrap_or(0.))
+    }
+
+    pub extern "Lua-C" fn modified(&self) -> Result<f64> {
+        Ok(self
+            .0
+            .modified()?
+            .duration_since(SystemTime::UNIX_EPOCH)
+            .map(|dur| dur.as_secs_f64())
+            .unwrap_or(0.))
+    }
+
+    pub extern "Lua-C" fn accessed(&self) -> Result<f64> {
+        Ok(self
+            .0
+            .accessed()?
+            .duration_since(SystemTime::UNIX_EPOCH)
+            .map(|dur| dur.as_secs_f64())
+            .unwrap_or(0.))
+    }
+
+    #[tostring]
+    pub extern "Lua-C" fn tostring(&self) -> String {
+        let ty = self.0.file_type();
+        if ty.is_file() {
+            format!("file {}", self.0.len())
+        } else if ty.is_dir() {
+            "dir".into()
+        } else if ty.is_symlink() {
+            "symlink".into()
+        } else {
+            "other".into()
+        }
+    }
+}
+
+/// Representation of the various permissions on a file.
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_file_perms(#[opaque] std::fs::Permissions);
+
+#[metatype]
+impl lb_file_perms {
+    pub extern "Lua-C" fn readonly(&self) -> bool {
+        self.0.readonly()
+    }
+
+    pub extern "Lua-C" fn set_readonly(&mut self, readonly: bool) {
+        self.0.set_readonly(readonly);
+    }
+}
+
+/// Iterator for recursively descending into a directory.
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_walk_dir(#[opaque] walkdir::IntoIter);
+
+#[metatype]
+impl lb_walk_dir {
+    #[call]
+    pub extern "Lua-C" fn next(&mut self) -> Result<Option<lb_walk_dir_entry>> {
+        Ok(self.0.next().transpose()?.map(Into::into))
+    }
+}
+
+/// Entry inside of a directory on the filesystem obtained from [`lb_walk_dir`].
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_walk_dir_entry(#[opaque] walkdir::DirEntry);
+
+#[metatype]
+impl lb_walk_dir_entry {
+    pub extern "Lua-C" fn path(&self) -> String {
+        self.0.path().to_string_lossy().into()
+    }
+
+    pub extern "Lua-C" fn name(&self) -> String {
+        self.0.file_name().to_string_lossy().into()
+    }
+
+    pub extern "Lua-C" fn r#type(&self) -> lb_file_type {
+        self.0.file_type().into()
+    }
+
+    pub extern "Lua-C" fn metadata(&self) -> Result<lb_file_meta> {
+        Ok(self.0.metadata()?.into())
+    }
+
+    pub extern "Lua-C" fn is_symlink(&self) -> bool {
+        self.0.path_is_symlink()
+    }
+
+    pub extern "Lua-C" fn depth(&self) -> u32 {
+        self.0.depth() as u32
+    }
+
+    #[cfg(unix)]
+    pub extern "Lua-C" fn ino(&self) -> u64 {
+        use walkdir::DirEntryExt;
+        self.0.ino()
+    }
+
+    #[tostring]
+    pub extern "Lua" fn tostring(&self) -> String {
+        self.path()
+    }
+}
+
+/// Iterator that yields paths from the filesystem that match a particular pattern.
+#[derive(Debug)]
+#[cdef]
+pub struct lb_glob_dir {
+    #[opaque]
+    iter: walkdir::IntoIter,
+    #[opaque]
+    matcher: globset::GlobSet,
+    #[opaque]
+    prefix: PathBuf,
+}
+
+#[metatype]
+impl lb_glob_dir {
+    #[call]
+    pub extern "Lua-C" fn next(&mut self) -> Result<Option<lb_walk_dir_entry>> {
+        while let Some(res) = self.iter.next() {
+            let entry = res?;
+            let path = entry.path().strip_prefix(&self.prefix).unwrap();
+            if self.matcher.is_match(path) {
+                return Ok(Some(entry.into()));
+            }
+        }
+
+        Ok(None)
+    }
+}
+
+/// Directory in the filesystem that is automatically deleted when it is garbage-collected.
+#[derive(Debug, From)]
+#[cdef]
+pub struct lb_temp_dir(#[opaque] tempfile::TempDir);
+
+#[metatype]
+impl lb_temp_dir {
+    pub extern "Lua-C" fn path(&self) -> String {
+        self.0.path().to_string_lossy().into()
+    }
+
+    #[tostring]
+    pub extern "Lua" fn tostring(&self) -> String {
+        self.path()
    }
 }
--- a/crates/lb/src/lib.rs
+++ b/crates/lb/src/lib.rs
@@ -1,5 +1,12 @@
-pub mod channel;
-pub mod fs;
-pub mod net;
+//! luby standard library
+#![warn(missing_docs)]
 pub mod runtime;
+
+#[cfg(feature = "task")]
+pub mod chan;
+#[cfg(feature = "fs")]
+pub mod fs;
+#[cfg(feature = "net")]
+pub mod net;
+#[cfg(feature = "task")]
 pub mod task;
--- a/crates/lb/src/net.rs
+++ b/crates/lb/src/net.rs
@@ -1,27 +1,52 @@
-//! The `lb:net` module provides an asynchronous network API for creating TCP or UDP servers and
+//! Networking library
+//!
+//! The `lb:net` library provides an asynchronous network API for creating TCP or UDP servers and
 //! clients.
 //!
-//! See [`lb_libnet`] for items exported by this module.
+//! ## Exports
+//!
+//! See [`lb_netlib`] for items exported by this library.
 use derive_more::{From, FromStr};
 use luaffi::{cdef, metatype};
 use std::{
-    io,
    net::{AddrParseError, IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr},
+    time::Duration,
 };
+use thiserror::Error;
 use tokio::net::{TcpListener, TcpSocket, TcpStream};

-/// Items exported by the `lb:net` module.
+/// Errors that can be thrown by this library.
 ///
-/// This module can be obtained by calling `require` in Lua.
+/// Functions which return this error will **throw** in Lua. The error message can be caught by
+/// using [`pcall(f, ...)`](https://www.lua.org/manual/5.1/manual.html#pdf-pcall).
+#[derive(Debug, Error)]
+pub enum Error {
+    /// I/O error.
+    #[error("{0}")]
+    Io(#[from] std::io::Error),
+    /// IP or socket address syntax error.
+    #[error("{0}")]
+    InvalidAddr(#[from] AddrParseError),
+    /// Socket was already converted and cannot be used anymore.
+    #[error("socket was already converted")]
+    SocketConsumed,
+}
+
+type Result<T> = std::result::Result<T, Error>;
+
+/// Items exported by the `lb:net` library.
+///
+/// This library can be acquired by calling
+/// [`require("lb:net")`](https://www.lua.org/manual/5.1/manual.html#pdf-require) in Lua.
 ///
 /// ```lua
 /// local net = require("lb:net");
 /// ```
-#[cdef]
-pub struct lb_libnet;
+#[cdef(module = "lb:net")]
+pub struct lb_netlib;

 #[metatype]
-impl lb_libnet {
+impl lb_netlib {
    #[new]
    extern "Lua-C" fn new() -> Self {
        Self
@@ -57,22 +82,18 @@ impl lb_libnet {
    /// If `s` is an [`lb_ipaddr`], a copy of that value is returned. If `s` is an
    /// [`lb_socketaddr`], the IP address part of the socket address is returned. Otherwise, parses
    /// `s` as an IP address string. Both IPv4 or IPv6 addresses are supported.
-    ///
-    /// # Errors
-    ///
-    /// Throws if `s` cannot be parsed as an IP address.
-    pub extern "Lua" fn ipaddr(&self, s: any) -> lb_ipaddr {
-        if __istype(__ct.lb_ipaddr, s) {
-            __new(__ct.lb_ipaddr, s) // copy constructor
-        } else if __istype(__ct.lb_socketaddr, s) {
+    pub extern "Lua" fn ipaddr(&self, addr: any) -> Result<lb_ipaddr> {
+        if __istype(__ct.lb_ipaddr, addr) {
+            __new(__ct.lb_ipaddr, addr) // copy constructor
+        } else if __istype(__ct.lb_socketaddr, addr) {
            s.ip()
        } else {
-            self.__parse_ipaddr(s)
+            self.__parse_ipaddr(addr)
        }
    }

-    extern "Lua-C" fn __parse_ipaddr(&self, s: &str) -> Result<lb_ipaddr, AddrParseError> {
-        s.parse()
+    extern "Lua-C" fn __parse_ipaddr(&self, addr: &str) -> Result<lb_ipaddr> {
+        Ok(addr.parse()?)
    }

    /// Creates an [`lb_socketaddr`] from the given input.
@@ -84,64 +105,75 @@ impl lb_libnet {
    /// socket address string. Both IPv4 and IPv6 addresses are supported.
    ///
    /// If `port` is not specified, `0` is used as the default.
-    ///
-    /// # Errors
-    ///
-    /// Throws if `s` cannot be parsed as an IP or socket address.
-    pub extern "Lua" fn socketaddr(&self, s: any, port: any) -> lb_socketaddr {
+    pub extern "Lua" fn socketaddr(&self, addr: any, port: any) -> Result<lb_socketaddr> {
        if port != () {
-            self.__new_socketaddr(self.ipaddr(s), port)
+            self.__new_skaddr(self.ipaddr(addr), port)
        } else {
-            if __istype(__ct.lb_socketaddr, s) {
-                __new(__ct.lb_socketaddr, s) // copy constructor
-            } else if __istype(__ct.lb_ipaddr, s) {
-                self.__new_socketaddr(s, 0) // default port 0
+            if __istype(__ct.lb_socketaddr, addr) {
+                __new(__ct.lb_socketaddr, addr) // copy constructor
+            } else if __istype(__ct.lb_ipaddr, addr) {
+                self.__new_skaddr(addr, 0) // default port 0
            } else {
-                self.__parse_socketaddr(s)
+                self.__parse_skaddr(addr)
            }
        }
    }

-    extern "Lua-C" fn __new_socketaddr(&self, ip: &lb_ipaddr, port: u16) -> lb_socketaddr {
+    extern "Lua-C" fn __new_skaddr(&self, ip: &lb_ipaddr, port: u16) -> lb_socketaddr {
        SocketAddr::new(ip.0, port).into()
    }

-    extern "Lua-C" fn __parse_socketaddr(&self, s: &str) -> Result<lb_socketaddr, AddrParseError> {
-        s.parse()
+    extern "Lua-C" fn __parse_skaddr(&self, addr: &str) -> Result<lb_socketaddr> {
+        Ok(if let Ok(addr) = addr.parse() {
+            SocketAddr::new(addr, 0).into() // default port 0
+        } else {
+            addr.parse::<SocketAddr>()?.into()
+        })
    }

    /// Creates a new TCP socket configured for IPv4.
    ///
    /// See [`TcpSocket::new_v4`].
-    ///
-    /// # Errors
-    ///
-    /// Throws if an error was encountered during the socket creation.
-    pub extern "Lua" fn tcp_v4(&self) -> lb_tcpsocket {
-        self.__new_tcp_v4()
+    pub extern "Lua-C" fn tcp(&self) -> Result<lb_tcpsocket> {
+        Ok(Some(TcpSocket::new_v4()?).into())
    }

    /// Creates a new TCP socket configured for IPv6.
    ///
    /// See [`TcpSocket::new_v6`].
-    ///
-    /// # Errors
-    ///
-    /// Throws if an error was encountered during the socket creation.
-    pub extern "Lua" fn tcp_v6(&self) -> lb_tcpsocket {
-        self.__new_tcp_v6()
+    pub extern "Lua-C" fn tcp6(&self) -> Result<lb_tcpsocket> {
+        Ok(Some(TcpSocket::new_v6()?).into())
    }

-    extern "Lua-C" fn __new_tcp_v4(&self) -> io::Result<lb_tcpsocket> {
-        TcpSocket::new_v4().map(lb_tcpsocket)
+    pub async extern "Lua" fn bind_tcp(&self, addr: any, port: any) -> Result<lb_tcpsocket> {
+        let addr = self.socketaddr(addr, port);
+        let socket;
+        if addr.ip().is_v6() {
+            socket = self.tcp6();
+        } else {
+            socket = self.tcp();
+        }
+        socket.bind(addr);
+        socket
    }

-    extern "Lua-C" fn __new_tcp_v6(&self) -> io::Result<lb_tcpsocket> {
-        TcpSocket::new_v6().map(lb_tcpsocket)
+    pub async extern "Lua" fn connect_tcp(&self, addr: any, port: any) -> Result<lb_tcpstream> {
+        let addr = self.socketaddr(addr, port);
+        let socket;
+        if addr.ip().is_v6() {
+            socket = self.tcp6();
+        } else {
+            socket = self.tcp();
+        }
+        socket.connect(addr)
+    }
+
+    pub async extern "Lua" fn listen_tcp(&self, addr: any, port: any) -> Result<lb_tcplistener> {
+        self.bind_tcp(addr, port).listen(1024)
    }
 }

-/// An IP address, either IPv4 or IPv6.
+/// IP address, either IPv4 or IPv6.
 ///
 /// # Example
 ///
@@ -266,7 +298,7 @@ impl lb_ipaddr {
    }
 }

-/// A socket address, which is an IP address with a port number.
+/// Socket address, which is an IP address with a port number.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, From, FromStr)]
 #[cdef]
 pub struct lb_socketaddr(#[opaque] SocketAddr);
@@ -280,14 +312,14 @@ impl lb_socketaddr {

    /// Sets the IP part of this address.
    ///
-    /// This function accepts the same arguments as [`ipaddr`](lb_libnet::ipaddr).
-    pub extern "Lua" fn set_ip(&mut self, s: any) -> &mut Self {
-        if __istype(__ct.lb_ipaddr, s) {
-            self.__set_ip(s);
-        } else if __istype(__ct.lb_socketaddr, s) {
-            self.__set_ip(s.ip());
+    /// This function accepts the same arguments as [`ipaddr`](lb_netlib::ipaddr).
+    pub extern "Lua" fn set_ip(&mut self, addr: any) -> &mut Self {
+        if __istype(__ct.lb_ipaddr, addr) {
+            self.__set_ip(addr);
+        } else if __istype(__ct.lb_socketaddr, addr) {
+            self.__set_ip(addr.ip());
        } else {
-            self.__set_ip_parse(s);
+            self.__set_ip_parse(addr);
        }
        self
    }
@@ -296,8 +328,8 @@ impl lb_socketaddr {
        self.0.set_ip(ip.0);
    }

-    extern "Lua-C" fn __set_ip_parse(&mut self, s: &str) -> Result<(), AddrParseError> {
-        s.parse().map(|ip| self.0.set_ip(ip))
+    extern "Lua-C" fn __set_ip_parse(&mut self, addr: &str) -> Result<()> {
+        Ok(self.0.set_ip(addr.parse()?))
    }

    /// Returns the port part of this address.
@@ -306,7 +338,7 @@ impl lb_socketaddr {
    }

    /// Sets the port part of this address.
-    pub extern "Lua" fn set_port(&mut self, port: number) -> &mut Self {
+    pub extern "Lua" fn set_port(&mut self, port: integer) -> &mut Self {
        self.__set_port(port);
        self
    }
@@ -322,14 +354,127 @@ impl lb_socketaddr {
    }
 }

-/// A TCP socket which has not yet been converted to a [`lb_tcpstream`] or [`lb_tcplistener`].
+/// TCP socket which has not yet been converted to an [`lb_tcpstream`] or [`lb_tcplistener`].
 #[derive(Debug, From)]
 #[cdef]
-pub struct lb_tcpsocket(#[opaque] TcpSocket);
+pub struct lb_tcpsocket(#[opaque] Option<TcpSocket>);

 #[metatype]
-impl lb_tcpsocket {}
+impl lb_tcpsocket {
+    fn socket(&self) -> Result<&TcpSocket> {
+        self.0.as_ref().ok_or(Error::SocketConsumed)
+    }

+    /// See [`TcpSocket::keepalive`].
+    pub extern "Lua-C" fn keepalive(&self) -> Result<bool> {
+        Ok(self.socket()?.keepalive()?)
+    }
+
+    /// See [`TcpSocket::set_keepalive`].
+    pub extern "Lua-C" fn set_keepalive(&self, enabled: bool) -> Result<()> {
+        Ok(self.socket()?.set_keepalive(enabled)?)
+    }
+
+    /// See [`TcpSocket::reuseaddr`].
+    pub extern "Lua-C" fn reuseaddr(&self) -> Result<bool> {
+        Ok(self.socket()?.reuseaddr()?)
+    }
+
+    /// See [`TcpSocket::set_reuseaddr`].
+    pub extern "Lua-C" fn set_reuseaddr(&self, enabled: bool) -> Result<()> {
+        Ok(self.socket()?.set_reuseaddr(enabled)?)
+    }
+
+    /// See [`TcpSocket::reuseport`].
+    pub extern "Lua-C" fn reuseport(&self) -> Result<bool> {
+        Ok(self.socket()?.reuseport()?)
+    }
+
+    /// See [`TcpSocket::set_reuseport`].
+    pub extern "Lua-C" fn set_reuseport(&self, enabled: bool) -> Result<()> {
+        Ok(self.socket()?.set_reuseport(enabled)?)
+    }
+
+    /// See [`TcpSocket::send_buffer_size`].
+    pub extern "Lua-C" fn sendbuf(&self) -> Result<u32> {
+        Ok(self.socket()?.send_buffer_size()?)
+    }
+
+    /// See [`TcpSocket::set_send_buffer_size`].
+    pub extern "Lua-C" fn set_sendbuf(&self, size: u32) -> Result<()> {
+        Ok(self.socket()?.set_send_buffer_size(size)?)
+    }
+
+    /// See [`TcpSocket::recv_buffer_size`].
+    pub extern "Lua-C" fn recvbuf(&self) -> Result<u32> {
+        Ok(self.socket()?.recv_buffer_size()?)
+    }
+
+    /// See [`TcpSocket::set_recv_buffer_size`].
+    pub extern "Lua-C" fn set_recvbuf(&self, size: u32) -> Result<()> {
+        Ok(self.socket()?.set_recv_buffer_size(size)?)
+    }
+
+    /// See [`TcpSocket::linger`].
+    pub extern "Lua-C" fn linger(&self) -> Result<f64> {
+        Ok(self
+            .socket()?
+            .linger()?
+            .map(|n| n.as_secs_f64())
+            .unwrap_or(0.))
+    }
+
+    /// See [`TcpSocket::set_linger`].
+    pub extern "Lua-C" fn set_linger(&self, secs: f64) -> Result<()> {
+        Ok(self
+            .socket()?
+            .set_linger((secs != 0.).then_some(Duration::from_secs_f64(secs)))?)
+    }
+
+    /// See [`TcpSocket::nodelay`].
+    pub extern "Lua-C" fn nodelay(&self) -> Result<bool> {
+        Ok(self.socket()?.nodelay()?)
+    }
+
+    /// See [`TcpSocket::set_nodelay`].
+    pub extern "Lua-C" fn set_nodelay(&self, enabled: bool) -> Result<()> {
+        Ok(self.socket()?.set_nodelay(enabled)?)
+    }
+
+    /// See [`TcpSocket::tos`].
+    pub extern "Lua-C" fn tos(&self) -> Result<u32> {
+        Ok(self.socket()?.tos()?)
+    }
+
+    /// See [`TcpSocket::set_tos`].
+    pub extern "Lua-C" fn set_tos(&self, tos: u32) -> Result<()> {
+        Ok(self.socket()?.set_tos(tos)?)
+    }
+
+    /// See [`TcpSocket::local_addr`].
+    pub extern "Lua-C" fn local_addr(&self) -> Result<lb_socketaddr> {
+        Ok(self.socket()?.local_addr()?.into())
+    }
+
+    /// See [`TcpSocket::bind`].
+    pub extern "Lua-C" fn bind(&self, addr: &lb_socketaddr) -> Result<()> {
+        Ok(self.socket()?.bind(addr.0)?)
+    }
+
+    /// See [`TcpSocket::connect`].
+    pub async extern "Lua-C" fn connect(&mut self, addr: &lb_socketaddr) -> Result<lb_tcpstream> {
+        let socket = self.0.take().ok_or(Error::SocketConsumed)?;
+        Ok(socket.connect(addr.0).await?.into())
+    }
+
+    /// See [`TcpSocket::listen`].
+    pub extern "Lua-C" fn listen(&mut self, backlog: u32) -> Result<lb_tcplistener> {
+        let socket = self.0.take().ok_or(Error::SocketConsumed)?;
+        Ok(socket.listen(backlog)?.into())
+    }
+}
+
+/// TCP connection between a local and a remote socket.
 #[derive(Debug, From)]
 #[cdef]
 pub struct lb_tcpstream(#[opaque] TcpStream);
@@ -337,6 +482,7 @@ pub struct lb_tcpstream(#[opaque] TcpStream);
 #[metatype]
 impl lb_tcpstream {}

+/// TCP socket server, listening for connections.
 #[derive(Debug, From)]
 #[cdef]
 pub struct lb_tcplistener(#[opaque] TcpListener);
--- a/crates/lb/src/runtime.lua
+++ b/crates/lb/src/runtime.lua
@@ -1,5 +0,0 @@
-local task = require("lb:task")
-
-function spawn(f, ...)
-  return task:spawn(f, ...)
-end
--- a/crates/lb/src/runtime.rs
+++ b/crates/lb/src/runtime.rs
@@ -1,85 +1,115 @@
-use crate::{channel::lb_libchannel, fs::lb_libfs, net::lb_libnet, task::lb_libtask};
+#![doc(hidden)]
 use derive_more::{Deref, DerefMut};
-use luaffi::{Registry, Type};
+use luaffi::{Module, Registry};
 use luajit::{Chunk, State};
-use std::fmt::Display;
+use std::rc::Rc;
 use tokio::{
    task::{JoinHandle, LocalSet, futures::TaskLocalFuture, spawn_local},
    task_local,
 };

-#[derive(Debug, Default)]
+pub type ErrorFn = dyn Fn(&luajit::Error);
+
 pub struct Builder {
    registry: Registry,
+    report_err: Rc<ErrorFn>,
 }

 impl Builder {
    pub fn new() -> Self {
-        let mut registry = Registry::new();
-
-        registry
-            .preload::<lb_libtask>("lb:task")
-            .preload::<lb_libchannel>("lb:channel")
-            .preload::<lb_libfs>("lb:fs")
-            .preload::<lb_libnet>("lb:net");
-
-        Self { registry }
+        Self {
+            registry: Registry::new(),
+            report_err: Rc::new(|err| match err.trace() {
+                Some(trace) => eprintln!("unhandled lua error: {err}\n{trace}"),
+                None => eprintln!("unhandled lua error: {err}"),
+            }),
        }
-
-    pub fn module<T: Type>(&mut self, name: impl Display) -> &mut Self {
-        self.registry.preload::<T>(name);
-        self
    }

    pub fn registry(&self) -> &Registry {
        &self.registry
    }

+    pub fn unhandled_error(&mut self, handler: impl Fn(&luajit::Error) + 'static) -> &mut Self {
+        self.report_err = Rc::new(handler);
+        self
+    }
+
+    pub fn module<T: Module>(&mut self) -> &mut Self {
+        self.registry.preload::<T>();
+        self
+    }
+
    pub fn build(&self) -> luajit::Result<Runtime> {
        Ok(Runtime {
+            cx: Context {
                state: {
                    let mut s = State::new()?;
-                let mut chunk = Chunk::new(self.registry.done());
-                chunk.extend(include_bytes!("./runtime.lua"));
-                s.eval(chunk.path("[luby]"), 0, 0)?;
+                    s.eval(Chunk::new(self.registry.build()).path("[luby]"), 0, 0)?;
                    s
                },
+                report_err: self.report_err.clone(),
+            },
            tasks: LocalSet::new(),
        })
    }
 }

-#[derive(Debug, Deref, DerefMut)]
+#[derive(Deref, DerefMut)]
 pub struct Runtime {
    #[deref]
    #[deref_mut]
-    state: State,
+    cx: Context,
    tasks: LocalSet,
 }

-task_local! {
-    static STATE: State;
-}
-
 impl Runtime {
    pub fn spawn<T: 'static>(
        &self,
-        f: impl AsyncFnOnce(&mut State) -> T + 'static,
+        f: impl AsyncFnOnce(&mut Context) -> T + 'static,
    ) -> JoinHandle<T> {
        self.tasks
-            .spawn_local(async move { f(&mut STATE.with(|s| s.new_thread())).await })
+            .spawn_local(async move { f(&mut CURRENT.with(|s| s.new_thread())).await })
    }
 }

-pub fn spawn<T: 'static>(f: impl AsyncFnOnce(&mut State) -> T + 'static) -> JoinHandle<T> {
-    spawn_local(async move { f(&mut STATE.with(|s| s.new_thread())).await })
-}
-
 impl IntoFuture for Runtime {
    type Output = ();
-    type IntoFuture = TaskLocalFuture<State, LocalSet>;
+    type IntoFuture = TaskLocalFuture<Context, LocalSet>;

    fn into_future(self) -> Self::IntoFuture {
-        STATE.scope(self.state, self.tasks)
+        CURRENT.scope(self.cx, self.tasks)
    }
 }
+
+task_local! {
+    static CURRENT: Context;
+}
+
+#[derive(Deref, DerefMut)]
+pub struct Context {
+    #[deref]
+    #[deref_mut]
+    state: State,
+    report_err: Rc<ErrorFn>,
+}
+
+impl Context {
+    pub fn new_thread(&self) -> Self {
+        Self {
+            state: self.state.new_thread(),
+            report_err: self.report_err.clone(),
+        }
+    }
+
+    pub fn report_error(&self, err: &luajit::Error) {
+        (self.report_err)(&err);
+    }
+}
+
+pub fn spawn<T: 'static>(f: impl AsyncFnOnce(&mut Context) -> T + 'static) -> JoinHandle<T> {
+    // SAFETY: `new_thread` must be called inside `spawn_local` because this free-standing spawn
+    // function may be called via ffi from lua, and it is not safe to access the lua state within
+    // ffi calls.
+    spawn_local(async move { f(&mut CURRENT.with(|s| s.new_thread())).await })
+}
--- a/crates/lb/src/task.lua
+++ b/crates/lb/src/task.lua
@@ -0,0 +1,10 @@
+-- include task functions in the global scope
+local task = require("lb:task")
+
+function sleep(ms)
+  return task:sleep(ms)
+end
+
+function spawn(f, ...)
+  return task:spawn(f, ...)
+end
--- a/crates/lb/src/task.rs
+++ b/crates/lb/src/task.rs
@@ -1,46 +1,103 @@
+//! Task library
+//!
+//! The `lb:task` library primitives for asynchronous communication between tasks via message
+//! passing channels.
+//!
+//! ## Exports
+//!
+//! See [`lb_tasklib`] for items exported by this library.
 use crate::runtime::spawn;
 use luaffi::{cdef, metatype};
-use std::{ffi::c_int, process};
-use tokio::task::JoinHandle;
+use luajit::{LUA_MULTRET, Type};
+use std::{ffi::c_int, time::Duration};
+use tokio::{task::JoinHandle, time::sleep};

-#[cdef]
-pub struct lb_libtask;
+/// Items exported by the `lb:task` library.
+///
+/// This library can be acquired by calling
+/// [`require("lb:task")`](https://www.lua.org/manual/5.1/manual.html#pdf-require) in Lua.
+///
+/// ```lua
+/// local task = require("lb:task");
+/// ```
+#[cdef(module = "lb:task")]
+pub struct lb_tasklib;

 #[metatype]
-impl lb_libtask {
+#[include("task.lua")]
+impl lb_tasklib {
    #[new]
    extern "Lua-C" fn new() -> Self {
        Self
    }

-    pub extern "Lua" fn spawn(self, f: function, ...) {
-        // pack the function and its arguments into a table and pass its ref to rust
+    pub async extern "Lua-C" fn sleep(&self, ms: f64) {
+        sleep(Duration::from_secs_f64(ms / 1000.)).await;
+    }
+
+    pub extern "Lua" fn spawn(&self, f: function, ...) -> lb_task {
+        // pack the function and its arguments into a table and pass its ref to rust.
+        //
+        // this table is used from rust-side to call the function with its args, and it's also
+        // reused to store its return values that the task handle can return when awaited. the ref
+        // is owned by the task handle and unref'ed when it's gc'ed.
        self.__spawn(__ref(__tpack(f, variadic!())))
    }

    extern "Lua-C" fn __spawn(&self, key: c_int) -> lb_task {
-        let handle = spawn(async move |s| {
-            // SAFETY: key is always unique, created by __ref above
-            let arg = unsafe { s.new_ref_unchecked(key) };
+        let handle = spawn(async move |cx| {
+            // SAFETY: key is always unique, created by __ref above.
+            let arg = unsafe { cx.new_ref_unchecked(key) };
+            let mut s = cx.guard();
            s.resize(0);
-            s.push(arg);
-            let narg = s.unpack(1, 1, None) - 1;
-            println!("{s:?}");
-            if let Err(_err) = s.call_async(narg, 0).await {
-                process::exit(1)
+            s.push(&arg);
+            let narg = s.unpack(1, 1, None) - 1; // unpack the function and its args from the table
+            debug_assert!(s.slot(2).type_of() == Type::Function);
+            match s.call_async(narg, LUA_MULTRET).await {
+                Ok(nret) => {
+                    s.pack(1, nret); // pack the return values back into the table
                }
-            println!("{s:?}");
+                Err(err) => {
+                    drop(s);
+                    cx.report_error(&err);
+                }
+            }
+            let _ = arg.into_raw(); // the original ref is owned by the task handle and unref'ed there
        });

-        lb_task { handle }
+        lb_task {
+            handle: Some(handle),
+            __ref: key,
+        }
    }
 }

+/// Handle for an asynchronous task created by [`spawn`](lb_tasklib::spawn).
 #[cdef]
 pub struct lb_task {
    #[opaque]
-    handle: JoinHandle<()>,
+    handle: Option<JoinHandle<()>>,
+    __ref: c_int,
 }

 #[metatype]
-impl lb_task {}
+impl lb_task {
+    pub async extern "Lua" fn r#await(&self) -> many {
+        self.__await();
+        let ret = __registry[self.__ref];
+        __tunpack(ret, 1, ret.n)
+    }
+
+    async extern "Lua-C" fn __await(&mut self) {
+        if let Some(handle) = self.handle.take() {
+            handle
+                .await
+                .unwrap_or_else(|err| panic!("task handler panicked: {err}"));
+        }
+    }
+
+    #[gc]
+    extern "Lua" fn gc(&self) {
+        __unref(self.__ref);
+    }
+}
--- a/crates/lb/tests/fs.lua
+++ b/crates/lb/tests/fs.lua
@@ -0,0 +1,17 @@
+local ok, fs = pcall(require, "lb:fs")
+if not ok then return end
+
+describe("temp files", function()
+  test("temp_dir cleans itself", function()
+    local path
+    do
+      local dir = fs:temp_dir()
+      path = dir:path()
+      assert(path and path ~= "")
+      fs:write(path .. "/test.txt", "test file")
+      assert(fs:read(path .. "/test.txt") == "test file")
+    end
+    collectgarbage()
+    assert(not pcall(fs.read, fs, path .. "/test.txt"))
+  end)
+end)
--- a/crates/lb/tests/net.lua
+++ b/crates/lb/tests/net.lua
@@ -0,0 +1,17 @@
+local ok, net = pcall(require, "lb:net")
+if not ok then return end
+
+describe("tcp", function()
+  describe("socket", function()
+    test("bind", function()
+      local socket = net:bind_tcp("127.0.0.1")
+
+      -- binds to the correct port
+      assert(tostring(socket:local_addr():ip()) == "127.0.0.1")
+      assert(socket:local_addr():port() ~= 0)
+
+      -- should not be able to rebind socket
+      assert(not pcall(socket.bind, socket, net:socketaddr("127.0.0.1")))
+    end)
+  end)
+end)
--- a/crates/lb/tests/net.rs
+++ b/crates/lb/tests/net.rs
@@ -1,32 +0,0 @@
-use lb::runtime;
-use luaify::luaify;
-use luajit::{Chunk, LoadMode};
-use tokio::test;
-
-async fn run_lua(s: &'static str) {
-    let rt = runtime::Builder::new().build().unwrap();
-    let task = rt.spawn(async move |state| {
-        println!("executing test chunk: {s}");
-
-        state
-            .load(Chunk::new(s).mode(LoadMode::TEXT))
-            .unwrap_or_else(|err| panic!("{err}"));
-
-        state
-            .call_async(0, 0)
-            .await
-            .unwrap_or_else(|err| panic!("{err}"));
-    });
-
-    rt.await;
-    task.await.unwrap_or_else(|err| panic!("{err}"));
-}
-
-#[test]
-async fn ipaddr() {
-    run_lua(luaify!({
-        let net = require("lb:net");
-        print(net.ipaddr("127.0.0.1"));
-    }))
-    .await
-}
--- a/crates/lb/tests/task.lua
+++ b/crates/lb/tests/task.lua
@@ -0,0 +1,103 @@
+local ok, task = pcall(require, "lb:task")
+if not ok then return end
+
+describe("spawn", function()
+  test("callback receives args", function()
+    spawn(function(...)
+      assert(select("#", ...) == 0)
+    end):await()
+
+    spawn(function(...)
+      assert(select("#", ...) == 1)
+      assert((...) == nil)
+    end, nil):await()
+
+    spawn(function(...)
+      assert(select("#", ...) == 4)
+      local args = table.pack(...)
+      assert(args[1] == 1 and args[2] == 2 and args[3] == nil and args[4] == 3)
+    end, 1, 2, nil, 3):await()
+  end)
+
+  test("await returns callback results", function()
+    local res = table.pack(spawn(function()
+      -- no returns
+    end):await())
+    assert(res.n == 0)
+
+    local res = table.pack(spawn(function()
+      return nil
+    end):await())
+    assert(res.n == 1 and res[1] == nil)
+
+    local res = table.pack(spawn(function()
+      return 1, 2, nil, 3
+    end):await())
+    assert(res.n == 4 and res[1] == 1 and res[2] == 2 and res[3] == nil and res[4] == 3)
+  end)
+
+  test("callback args and results", function()
+    local res = table.pack(spawn(function(...)
+      assert(select("#", ...) == 5)
+      local args = table.pack(...)
+      assert(args[1] == 5 and args[2] == 4 and args[3] == nil and args[4] == 3, args[5] == nil)
+      return 1, 3, nil
+    end, 5, 4, nil, 3, nil):await())
+    assert(res.n == 3 and res[1] == 1 and res[2] == 3 and res[3] == nil)
+  end)
+
+  test("order is consistent", function()
+    -- all tasks spawned in one batch should be resumed in the spawn order
+    local tasks, nums = {}, {}
+    for i = 1, 10 do
+      table.insert(
+        tasks,
+        spawn(function()
+          table.insert(nums, i)
+        end)
+      )
+    end
+    for i = 10, 1, -1 do
+      tasks[i]:await()
+    end
+    assert(#nums == 10)
+    for i = 1, 10 do
+      assert(nums[i] == i)
+    end
+  end)
+end)
+
+describe("sleep", function()
+  test("sleep is asynchronous", function()
+    local value
+    spawn(function()
+      value = "value"
+    end)
+    assert(value == nil)
+    task:sleep(100) -- implicit await: if it's synchronous, value wouldn't change
+    assert(value == "value")
+  end)
+end)
+
+describe("task", function()
+  test("properly unrefs arg and ret table", function()
+    local registry = debug.getregistry()
+    local ref, t
+    local cb = function()
+      return "my ret"
+    end
+    do
+      local task = spawn(cb, "my arg")
+      ref = task.__ref
+      t = registry[ref]
+      assert(type(t) == "table")
+      assert(t[1] == cb)
+      assert(t[2] == "my arg")
+      task:await()
+      assert(registry[task.__ref] == t)
+      assert(t[1] == "my ret")
+    end
+    collectgarbage()
+    assert(registry[ref] ~= t) -- if task unref'ed it, it should be either nil or the next freelist number
+  end)
+end)
--- a/crates/lb/tests/task.rs
+++ b/crates/lb/tests/task.rs
@@ -1,35 +0,0 @@
-use lb::runtime;
-use luaify::luaify;
-use luajit::{Chunk, LoadMode};
-use tokio::test;
-
-async fn run_lua(s: &'static str) {
-    let rt = runtime::Builder::new().build().unwrap();
-    let task = rt.spawn(async move |state| {
-        println!("executing test chunk: {s}");
-
-        state
-            .load(Chunk::new(s).mode(LoadMode::TEXT))
-            .unwrap_or_else(|err| panic!("{err}"));
-
-        state
-            .call_async(0, 0)
-            .await
-            .unwrap_or_else(|err| panic!("{err}"));
-    });
-
-    rt.await;
-    task.await.unwrap_or_else(|err| panic!("{err}"));
-}
-
-#[test]
-async fn task_test() {
-    run_lua(luaify!({
-        let thing = spawn(|| {
-            print("spawn callback!!!!!!!!!!!!!");
-        });
-        print("thing is", thing);
-        //
-    }))
-    .await
-}
--- a/crates/luaffi/Cargo.toml
+++ b/crates/luaffi/Cargo.toml
@@ -1,11 +1,19 @@
 [package]
 name = "luaffi"
-version = "0.1.0"
-edition = "2024"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true
+
+[features]
+option_ref_abi = []
+option_string_abi = []

 [dependencies]
 bstr = "1.12.0"
-luaffi_impl = { version = "0.1.0", path = "../luaffi_impl" }
-luaify = { version = "0.1.0", path = "../luaify" }
+luaffi_impl = { path = "../luaffi_impl" }
+luaify = { path = "../luaify" }
 rustc-hash = "2.1.1"
 simdutf8 = "0.1.5"
--- a/crates/luaffi/src/future.rs
+++ b/crates/luaffi/src/future.rs
@@ -177,6 +177,15 @@ unsafe impl<F: Future<Output: IntoFfi> + 'static> IntoFfi for lua_future<F> {
        self
    }

+    fn require_owned() -> bool {
+        // future always requires full ownership of itself even if it's a "temporary", because we
+        // must yield a full cdata to the runtime not a cdata containing a pointer to the future. if
+        // this is set to false, postlude might receive a reference lua_future cdata instead of a
+        // full lua_future cdata, and the runtime might incorrectly read the pointer value as
+        // lua_future itself (it does not dereference it).
+        true
+    }
+
    fn postlude(ret: &str) -> impl Display {
        // When returning a future from Rust to Lua, yield it immediately to the runtime which will
        // poll it to completion in the background, then take the fulfilled value once the thread
--- a/crates/luaffi/src/internal.rs
+++ b/crates/luaffi/src/internal.rs
@@ -9,12 +9,13 @@ use std::{
 #[allow(non_camel_case_types)]
 pub mod stub_types {
    pub struct any;
+    pub struct many;
    pub struct nil;
-    pub struct boolean;
+    pub type boolean = bool;
    pub struct lightuserdata;
    pub struct number;
    pub struct integer;
-    pub struct string;
+    pub type string = String;
    pub struct table;
    pub struct function;
    pub struct userdata;
--- a/crates/luaffi/src/lib.lua
+++ b/crates/luaffi/src/lib.lua
@@ -1,3 +1,4 @@
+---@diagnostic disable
 local LUA_REFNIL = -1 -- lib_aux.c
 local FREELIST_REF = 0

--- a/crates/luaffi/src/lib.rs
+++ b/crates/luaffi/src/lib.rs
@@ -11,13 +11,13 @@ use std::{
    mem,
 };

-pub mod future;
-pub mod string;
-
 #[doc(hidden)]
 #[path = "./internal.rs"]
 pub mod __internal;
+pub mod future;
+pub mod option;
 pub mod result;
+pub mod string;

 // Dummy function to ensure that strings passed to Rust via wrapper objects will not be
 // garbage-collected until the end of the function (used in string.rs when string marshalling is
@@ -38,7 +38,7 @@ const CACHE_LIBS: &[(&str, &str)] = &[
    ("package", "package"),
    ("debug", "debug"),
    ("jit", "jit"),
-    // require
+    // requires
    ("bit", r#"require("bit")"#),
    ("ffi", r#"require("ffi")"#),
    ("__tnew", r#"require("table.new")"#),
@@ -47,7 +47,7 @@ const CACHE_LIBS: &[(&str, &str)] = &[

 // https://www.lua.org/manual/5.1/manual.html#5.1
 const CACHE_LOCALS: &[(&str, &str)] = &[
-    // base
+    // baselib
    ("assert", "assert"),
    ("error", "error"),
    ("type", "type"),
@@ -68,7 +68,8 @@ const CACHE_LOCALS: &[(&str, &str)] = &[
    ("tonumber", "tonumber"),
    ("tostring", "tostring"),
    ("require", "require"),
-    // table
+    ("__yield", "coroutine.yield"), // (used in future.rs)
+    // tablib
    ("__tconcat", "table.concat"),
    ("__tinsert", "table.insert"),
    ("__tmaxn", "table.maxn"),
@@ -76,23 +77,21 @@ const CACHE_LOCALS: &[(&str, &str)] = &[
    ("__tsort", "table.sort"),
    ("__tpack", "table.pack"),
    ("__tunpack", "table.unpack"),
-    // string
+    // strlib
    ("__slen", "string.len"),
    ("__sprintf", "string.format"),
    ("__ssub", "string.sub"),
    ("__sgsub", "string.gsub"),
    ("__sgmatch", "string.gmatch"),
    ("__sdump", "string.dump"),
-    // math (used in luaify! macro)
+    // mathlib (used in luaify! macro)
    ("__fmod", "math.fmod"),
-    // coroutine (used in future.rs)
-    ("__yield", "coroutine.yield"),
-    // package
+    // loadlib
    ("__preload", "package.preload"),
-    // debug
+    // dblib
    ("__traceback", "debug.traceback"),
    ("__registry", "debug.getregistry()"), // (used in lib.lua)
-    // ffi
+    // ffilib
    ("__C", "ffi.C"),
    ("__ct", "{}"),
    ("__cdef", "ffi.cdef"),
@@ -105,7 +104,7 @@ const CACHE_LOCALS: &[(&str, &str)] = &[
    ("__sizeof", "ffi.sizeof"),
    ("__alignof", "ffi.alignof"),
    ("__intern", "ffi.string"), // (used in string.rs)
-    // bit (used in luaify! macro)
+    // bitlib (used in luaify! macro)
    ("__bnot", "bit.bnot"),
    ("__band", "bit.band"),
    ("__bor", "bit.bor"),
@@ -159,19 +158,19 @@ impl Registry {
        self
    }

-    pub fn preload<T: Type>(&mut self, name: impl Display) -> &mut Self {
+    pub fn preload<T: Module>(&mut self) -> &mut Self {
        assert!(T::ty() != TypeType::Void, "cannot declare void type");
-        self.include::<T>();
-        let ct = T::name();
+        let name = <T as Module>::name();
+        let ct = <T as Type>::name();
        writeln!(
            self.lua,
            r#"__preload["{name}"] = function(...) return __ct.{ct}(...); end;"#,
        )
        .unwrap();
-        self
+        self.include::<T>()
    }

-    pub fn done(&self) -> String {
+    pub fn build(&self) -> String {
        self.to_string()
    }
 }
@@ -241,6 +240,10 @@ impl<'r> TypeBuilder<'r> {
    }
 }

+pub trait Module: Type {
+    fn name() -> impl Display;
+}
+
 pub unsafe trait Cdef: Type {
    fn build(b: &mut CdefBuilder);
 }
@@ -321,6 +324,7 @@ pub struct MetatypeBuilder<'r> {
    ct: String,
    cdef: String,
    lua: String,
+    lua_includes: Vec<&'static str>,
 }

 impl<'r> MetatypeBuilder<'r> {
@@ -330,6 +334,7 @@ impl<'r> MetatypeBuilder<'r> {
            ct: T::Target::name().to_string(),
            cdef: String::new(),
            lua: r#"do local __mt, __idx = {}, {}; __mt.__index = __idx; "#.into(),
+            lua_includes: vec![],
        }
    }

@@ -338,35 +343,40 @@ impl<'r> MetatypeBuilder<'r> {
        self
    }

+    pub fn include_lua(&mut self, lua: &'static str) -> &mut Self {
+        self.lua_includes.push(lua);
+        self
+    }
+
    pub fn index(
        &mut self,
        name: impl Display,
-        f: impl FnOnce(&mut MetatypeMethodBuilder),
+        f: impl FnOnce(&mut MetatypeFunctionBuilder),
    ) -> &mut Self {
        write!(self.lua, "__idx.{name} = ").unwrap();
-        f(&mut MetatypeMethodBuilder::new(self));
-        write!(self.lua, "; ").unwrap();
+        f(&mut MetatypeFunctionBuilder::new(self));
+        writeln!(self.lua, ";").unwrap();
        self
    }

    pub fn index_raw(&mut self, name: impl Display, value: impl Display) -> &mut Self {
-        write!(self.lua, "__idx.{name} = {value}; ").unwrap();
+        writeln!(self.lua, "__idx.{name} = {value};").unwrap();
        self
    }

    pub fn metatable(
        &mut self,
        name: impl Display,
-        f: impl FnOnce(&mut MetatypeMethodBuilder),
+        f: impl FnOnce(&mut MetatypeFunctionBuilder),
    ) -> &mut Self {
        write!(self.lua, "__mt.__{name} = ").unwrap();
-        f(&mut MetatypeMethodBuilder::new(self));
-        write!(self.lua, "; ").unwrap();
+        f(&mut MetatypeFunctionBuilder::new(self));
+        writeln!(self.lua, ";").unwrap();
        self
    }

    pub fn metatable_raw(&mut self, name: impl Display, value: impl Display) -> &mut Self {
-        write!(self.lua, "__mt.__{name} = {value}; ").unwrap();
+        writeln!(self.lua, "__mt.__{name} = {value};").unwrap();
        self
    }
 }
@@ -378,12 +388,15 @@ impl<'r> Drop for MetatypeBuilder<'r> {
            ct,
            cdef,
            lua,
-            ..
+            lua_includes: lua_postlude,
        } = self;

        registry.cdef.push_str(cdef);
        registry.lua.push_str(lua);
        writeln!(registry.lua, r#"__metatype(__ct.{ct}, __mt); end;"#).unwrap();
+        for lua in lua_postlude {
+            writeln!(registry.lua, r#"do {lua} end;"#).unwrap();
+        }
    }
 }

@@ -417,6 +430,10 @@ pub unsafe trait IntoFfi: Sized {
        }
    }

+    fn require_owned() -> bool {
+        true
+    }
+
    fn postlude(_ret: &str) -> impl Display {
        ""
    }
@@ -425,16 +442,16 @@ pub unsafe trait IntoFfi: Sized {
 }

 #[derive(Debug)]
-pub struct MetatypeMethodBuilder<'r, 'm> {
+pub struct MetatypeFunctionBuilder<'r, 'm> {
    metatype: &'m mut MetatypeBuilder<'r>,
-    lparams: String,  // parameters to the lua function
-    cparams: String,  // parameters to the lua function
-    cargs: String,    // arguments to the C call
-    prelude: String,  // function body prelude
-    postlude: String, // function body postlude
+    lparams: String,  // lua function parameters
+    cparams: String,  // C function parameters
+    cargs: String,    // C call arguments
+    prelude: String,  // lua function body prelude
+    postlude: String, // lua function body postlude
 }

-impl<'r, 'm> MetatypeMethodBuilder<'r, 'm> {
+impl<'r, 'm> MetatypeFunctionBuilder<'r, 'm> {
    pub fn new(metatype: &'m mut MetatypeBuilder<'r>) -> Self {
        Self {
            metatype,
@@ -481,12 +498,17 @@ impl<'r, 'm> MetatypeMethodBuilder<'r, 'm> {
        self
    }

-    pub fn param_str(&mut self, name: impl Display) -> &mut Self {
-        // fast-path for &str and &[u8]-like parameters
+    pub fn param_str(
+        &mut self,
+        name: impl Display,
+        allow_nil: bool,
+        check_utf8: bool,
+    ) -> &mut Self {
+        // fast-path for &[u8] and &str-like parameters
        //
        // this passes one lua `string` argument as two C `const uint8_t *ptr` and `uintptr_t len`
        // arguments, bypassing the slower generic `&[u8]: FromFfi` path which constructs a
-        // temporary cdata to pass the string and its length in one argument
+        // temporary cdata to pass the string and its length in one argument.
        let Self {
            lparams,
            cparams,
@@ -495,22 +517,29 @@ impl<'r, 'm> MetatypeMethodBuilder<'r, 'm> {
            ..
        } = self;

-        let param_ptr = <*const u8>::cdecl("ptr");
-        let param_len = usize::cdecl("len");
+        let param_ptr = <*const u8>::cdecl(&name);
+        let param_len = usize::cdecl(format!("{name}_len"));

        (!lparams.is_empty()).then(|| lparams.push_str(", "));
        (!cparams.is_empty()).then(|| cparams.push_str(", "));
        (!cargs.is_empty()).then(|| cargs.push_str(", "));

        write!(lparams, "{name}").unwrap();
-        write!(cparams, "{param_ptr}, {param_len}",).unwrap();
+        write!(cparams, "{param_ptr}, {param_len}").unwrap();
        write!(cargs, "{name}, __{name}_len").unwrap();
-        write!(prelude, "local __{name}_len = 0; ").unwrap();
-        write!(
-            prelude,
-            r#"if {name} ~= nil then assert(type({name}) == "string", "string expected in argument '{name}', got " .. type({name})); __{name}_len = #{name}; end; "#
-        )
-        .unwrap();
+        write!(prelude, "local __{name}_len = 0; if {name} ~= nil then ").unwrap();
+        write!(prelude, r#"assert(type({name}) == "string", "string expected in argument '{name}', got " .. type({name})); "#).unwrap();
+        write!(prelude, r#"__{name}_len = #{name}; "#).unwrap();
+
+        if check_utf8 {
+            write!(prelude, r#"assert(__C.{IS_UTF8_FN}({name}, __{name}_len), "argument '{name}' must be a valid utf-8 string"); "#).unwrap();
+        }
+
+        if !allow_nil {
+            write!(prelude, r#"else return error("string expected in argument '{name}', got " .. type({name})); "#).unwrap();
+        }
+
+        write!(prelude, r#"end; "#).unwrap();
        self
    }

@@ -545,21 +574,21 @@ impl<'r, 'm> MetatypeMethodBuilder<'r, 'm> {
                if T::Into::ty() == TypeType::Void {
                    write!(lua, "__C.{func}({cargs}); {postlude}end").unwrap();
                } else {
-                    let check = T::postlude("__res");
-                    write!(lua, "local __res = __C.{func}({cargs}); ").unwrap();
-                    write!(lua, "{check}{postlude}return __res; end").unwrap();
+                    let check = T::postlude("__ret");
+                    write!(lua, "local __ret = __C.{func}({cargs}); ").unwrap();
+                    write!(lua, "{check}{postlude}return __ret; end").unwrap();
                }

                writeln!(cdef, "{};", T::Into::cdecl(display!("{func}({cparams})"))).unwrap();
            }
            FfiReturnConvention::ByOutParam => {
                let ct = T::Into::name();
-                let check = T::postlude("__res");
-                write!(lua, "local __res = __new(__ct.{ct}); __C.{func}(__res").unwrap();
+                let check = T::postlude("__out");
+                write!(lua, "local __out = __new(__ct.{ct}); __C.{func}(__out").unwrap();
                if !cargs.is_empty() {
                    write!(lua, ", {cargs}").unwrap();
                }
-                write!(lua, "); {check}{postlude}return __res; end").unwrap();
+                write!(lua, "); {check}{postlude}return __out; end").unwrap();
                write!(cdef, "void {func}({}", <*mut T::Into>::cdecl("out")).unwrap();
                if !cparams.is_empty() {
                    write!(cdef, ", {cparams}").unwrap();
@@ -844,7 +873,9 @@ macro_rules! impl_ptr_intoabi {

 impl_ptr_intoabi!(*const T);
 impl_ptr_intoabi!(*mut T);
+#[cfg(feature = "option_ref_abi")] // disabled because it conflicts with the generic Option<T> impl
 impl_ptr_intoabi!(Option<&'static T>);
+#[cfg(feature = "option_ref_abi")]
 impl_ptr_intoabi!(Option<&'static mut T>);

 //
--- a/crates/luaffi/src/option.rs
+++ b/crates/luaffi/src/option.rs
@@ -0,0 +1,84 @@
+use crate::{
+    __internal::{disp, display},
+    Cdef, CdefBuilder, IntoFfi, KEEP_FN, Type, TypeBuilder, TypeType,
+};
+use std::{ffi::c_int, fmt::Display};
+
+#[repr(C)]
+#[allow(non_camel_case_types)]
+pub enum lua_option<T> {
+    None,    // __tag = 0
+    Some(T), // __tag = 1
+}
+
+unsafe impl<T: Type> Type for lua_option<T> {
+    fn name() -> impl Display {
+        display!("option__{}", T::name())
+    }
+
+    fn ty() -> TypeType {
+        TypeType::Aggregate
+    }
+
+    fn cdecl(name: impl Display) -> impl Display {
+        display!("struct {} {name}", Self::name())
+    }
+
+    fn build(b: &mut TypeBuilder) {
+        b.cdef::<Self>();
+    }
+}
+
+unsafe impl<T: Type> Cdef for lua_option<T> {
+    fn build(b: &mut CdefBuilder) {
+        b.field::<c_int>("__tag");
+        (T::ty() != TypeType::Void).then(|| b.field::<T>("__value"));
+    }
+}
+
+unsafe impl<T: IntoFfi> IntoFfi for Option<T> {
+    type Into = lua_option<T::Into>;
+
+    fn convert(self) -> Self::Into {
+        match self {
+            Some(value) => lua_option::Some(T::convert(value)),
+            None => lua_option::None,
+        }
+    }
+
+    fn require_owned() -> bool {
+        // lua_option is only used to transmit information about whether we have a value or not and
+        // is forgotten immediately after use, so there is no need for an owned option
+        false
+    }
+
+    fn postlude(ret: &str) -> impl Display {
+        disp(move |f| {
+            write!(f, "if {ret}.__tag ~= 0 then ")?;
+            match T::Into::ty() {
+                TypeType::Void => write!(f, "{ret} = nil; ")?, // for void options, we don't have a __value
+                TypeType::Primitive => {
+                    // can always copy primitives to stack
+                    write!(f, "{ret} = {ret}.__value; {}", T::postlude(ret))?;
+                }
+                TypeType::Aggregate => {
+                    let ct = T::Into::name();
+                    if T::require_owned() {
+                        // inner value requires ownership; copy it into its own cdata and forget
+                        // option.
+                        write!(f, "{ret} = __new(__ct.{ct}, {ret}.__value); ")?;
+                        write!(f, "{}", T::postlude(ret))?;
+                    } else {
+                        // inner value is a "temporary" like an option itself and doesn't require
+                        // full ownership of itself. we just need to keep the option object alive
+                        // until its postlude completes.
+                        write!(f, "local {ret}_keep = {ret}; {ret} = {ret}.__value; ")?;
+                        write!(f, "do {}end; ", T::postlude(ret))?;
+                        write!(f, "__C.{KEEP_FN}({ret}_keep); ")?; // keep original option alive
+                    }
+                }
+            }
+            write!(f, "else {ret} = nil; end; ")
+        })
+    }
+}
--- a/crates/luaffi/src/result.rs
+++ b/crates/luaffi/src/result.rs
@@ -1,6 +1,6 @@
 use crate::{
    __internal::{disp, display},
-    Cdef, CdefBuilder, IntoFfi, Type, TypeBuilder, TypeType,
+    Cdef, CdefBuilder, IntoFfi, KEEP_FN, Type, TypeBuilder, TypeType,
    string::{DROP_BUFFER_FN, lua_buffer},
 };
 use std::{ffi::c_int, fmt::Display};
@@ -49,22 +49,44 @@ unsafe impl<T: IntoFfi, E: Display> IntoFfi for Result<T, E> {
        }
    }

+    fn require_owned() -> bool {
+        // lua_result is only used to transmit information about whether an operation succeeded or
+        // not and is forgotten immediately after use, so there is no need for an owned result
+        false
+    }
+
    fn postlude(ret: &str) -> impl Display {
        disp(move |f| {
-            let ct = T::Into::name();
            write!(f, "if {ret}.__tag ~= 0 then ")?;
            match T::Into::ty() {
-                TypeType::Void => write!(f, "{ret} = nil; "), // for void results, we don't have a __value
-                TypeType::Primitive => write!(f, "{ret} = {ret}.__value; "),
-                TypeType::Aggregate => write!(f, "{ret} = __new(__ct.{ct}, {ret}.__value); "),
-            }?;
+                TypeType::Void => write!(f, "{ret} = nil; ")?, // for void results, we don't have a __value
+                TypeType::Primitive => {
+                    // can always copy primitives to stack
+                    write!(f, "{ret} = {ret}.__value; {}", T::postlude(ret))?;
+                }
+                TypeType::Aggregate => {
+                    let ct = T::Into::name();
+                    if T::require_owned() {
+                        // inner value requires ownership; copy it into its own cdata and forget
+                        // result.
+                        write!(f, "{ret} = __new(__ct.{ct}, {ret}.__value); ")?;
                        write!(f, "{}", T::postlude(ret))?;
+                    } else {
+                        // inner value is a "temporary" like a result itself and doesn't require
+                        // full ownership of itself. we just need to keep the result object alive
+                        // until its postlude completes.
+                        write!(f, "local {ret}_keep = {ret}; {ret} = {ret}.__value; ")?;
+                        write!(f, "do {}end; ", T::postlude(ret))?;
+                        write!(f, "__C.{KEEP_FN}({ret}_keep); ")?; // keep original result alive
+                    }
+                }
+            }
            write!(
                f,
                "else \
-                    local __{ret}_msg = __intern({ret}.__err.__ptr, {ret}.__err.__len); \
+                    local {ret}_err = __intern({ret}.__err.__ptr, {ret}.__err.__len); \
                    __C.{DROP_BUFFER_FN}({ret}.__err); \
-                    return error(__{ret}_msg); \
+                    return error({ret}_err); \
                 end; "
            )
        })
--- a/crates/luaffi/src/string.rs
+++ b/crates/luaffi/src/string.rs
@@ -4,7 +4,7 @@ use crate::{
 };
 use bstr::{BStr, BString};
 use luaffi_impl::{cdef, metatype};
-use std::{fmt::Display, mem::ManuallyDrop, ptr, slice};
+use std::{fmt::Display, mem::ManuallyDrop, slice};

 pub(crate) const IS_UTF8_FN: &str = "luaffi_is_utf8";
 pub(crate) const DROP_BUFFER_FN: &str = "luaffi_drop_buffer";
@@ -42,6 +42,7 @@ impl lua_buf {
        }
    }

+    #[cfg(feature = "option_string_abi")]
    pub(crate) fn null() -> Self {
        Self {
            __ptr: ptr::null(),
@@ -71,6 +72,7 @@ impl lua_buffer {
        }
    }

+    #[cfg(feature = "option_string_abi")]
    pub(crate) fn null() -> Self {
        Self {
            __ptr: ptr::null_mut(),
@@ -154,8 +156,14 @@ unsafe impl IntoFfi for &'static [u8] {
        lua_buf::new(self)
    }

+    fn require_owned() -> bool {
+        // lua_buf is only used to have its contents interned then forgotten immediately; no need
+        // for ownership of it
+        false
+    }
+
    fn postlude(ret: &str) -> impl Display {
-        display!("{ret} = __intern({ret}.__ptr, {ret}.__len)")
+        display!("{ret} = __intern({ret}.__ptr, {ret}.__len); ")
    }
 }

@@ -166,9 +174,15 @@ unsafe impl IntoFfi for Vec<u8> {
        lua_buffer::new(self)
    }

+    fn require_owned() -> bool {
+        // lua_buffer is only used to have its contents interned then forgotten immediately; no need
+        // for ownership of it
+        false
+    }
+
    fn postlude(ret: &str) -> impl Display {
        display!(
-            "do local __{ret} = {ret}; {ret} = __intern({ret}.__ptr, {ret}.__len); __C.{DROP_BUFFER_FN}(__{ret}); end; "
+            "local {ret}_buf = {ret}; {ret} = __intern({ret}.__ptr, {ret}.__len); __C.{DROP_BUFFER_FN}({ret}_buf); "
        )
    }
 }
@@ -216,6 +230,13 @@ impl_into_via!(&'static str, &'static BStr);
 impl_into_via!(BString, Vec<u8>);
 impl_into_via!(String, BString);

+// `Option<String>: From/IntoFfi` isn't implemented because it conflicts with the generic
+// `Option<T>: From/IntoFfi` impl and rust doesn't have specialisation yet (and probably not anytime
+// soon). this is fine for now because we have specialisation for string-like parameters implemented
+// in the #[metatype] macro already, and string returns wrapped in `Option<T>` isn't much additional
+// overhead.
+#[cfg(feature = "option_string_abi")]
+mod impl_option_string {
    macro_rules! impl_optional_from {
        ($ty:ty) => {
            unsafe impl<'s> FromFfi for Option<$ty> {
@@ -269,3 +290,4 @@ impl_optional_into!(&'static str, lua_buf::null());
    impl_optional_into!(Vec<u8>, lua_buffer::null());
    impl_optional_into!(BString, lua_buffer::null());
    impl_optional_into!(String, lua_buffer::null());
+}
--- a/crates/luaffi_impl/Cargo.toml
+++ b/crates/luaffi_impl/Cargo.toml
@@ -1,7 +1,11 @@
 [package]
 name = "luaffi_impl"
-version = "0.1.0"
-edition = "2024"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true

 [lib]
 proc-macro = true
--- a/crates/luaffi_impl/src/cdef.rs
+++ b/crates/luaffi_impl/src/cdef.rs
@@ -5,18 +5,26 @@ use quote::{format_ident, quote, quote_spanned};
 use syn::{ext::IdentExt, spanned::Spanned, *};

 #[derive(Debug, FromMeta)]
-pub struct Args {}
+pub struct Args {
+    module: Option<String>,
+}

-pub fn transform(_args: Args, mut item: Item) -> Result<TokenStream> {
-    let (name, impl_type, impl_cdef) = match item {
+pub fn transform(args: Args, mut item: Item) -> Result<TokenStream> {
+    let (name, impl_type, impl_module, impl_cdef) = match item {
        Item::Struct(ref mut str) => (
            str.ident.clone(),
            generate_type(&str.ident)?,
+            args.module
+                .map(|name| generate_module(&name, &str.ident))
+                .transpose()?,
            generate_cdef_structure(str)?,
        ),
        Item::Enum(ref mut enu) => (
            enu.ident.clone(),
            generate_type(&enu.ident)?,
+            args.module
+                .map(|name| generate_module(&name, &enu.ident))
+                .transpose()?,
            generate_cdef_enum(enu)?,
        ),
        _ => syn_error!(item, "expected struct or enum"),
@@ -24,7 +32,7 @@ pub fn transform(_args: Args, mut item: Item) -> Result<TokenStream> {

    let mod_name = format_ident!("__{name}_cdef");

-    Ok(quote!(
+    Ok(quote_spanned!(name.span() =>
        #[repr(C)]
        #[allow(non_camel_case_types)]
        #item
@@ -35,6 +43,7 @@ pub fn transform(_args: Args, mut item: Item) -> Result<TokenStream> {
        mod #mod_name {
            use super::*;
            #impl_type
+            #impl_module
            #impl_cdef
        }
    ))
@@ -47,9 +56,7 @@ fn generate_type(ty: &Ident) -> Result<TokenStream> {

    Ok(quote_spanned!(span =>
        unsafe impl #ffi::Type for #ty {
-            fn name() -> impl ::std::fmt::Display {
-                #name
-            }
+            fn name() -> impl ::std::fmt::Display { #name }

            fn ty() -> #ffi::TypeType {
                #ffi::TypeType::Aggregate
@@ -72,6 +79,16 @@ fn generate_type(ty: &Ident) -> Result<TokenStream> {
    ))
 }

+fn generate_module(name: &str, ty: &Ident) -> Result<TokenStream> {
+    let ffi = ffi_crate();
+
+    Ok(quote_spanned!(ty.span() =>
+        impl #ffi::Module for #ty {
+            fn name() -> impl ::std::fmt::Display { #name }
+        }
+    ))
+}
+
 fn generate_cdef_structure(str: &mut ItemStruct) -> Result<TokenStream> {
    syn_assert!(
        str.generics.params.is_empty(),
@@ -155,13 +172,12 @@ fn parse_cfield_attrs(attrs: &mut Vec<Attribute>) -> Result<CFieldAttrs> {
    let mut parsed = CFieldAttrs::default();
    let mut i = 0;
    while let Some(attr) = attrs.get(i) {
-        if let Some(name) = attr.path().get_ident() {
-            if name == "opaque" {
+        let path = attr.path();
+        if path.is_ident("opaque") {
            parsed.opaque = true;
            attrs.remove(i);
            continue;
        }
-        }
        i += 1;
    }

--- a/crates/luaffi_impl/src/lib.rs
+++ b/crates/luaffi_impl/src/lib.rs
@@ -1,7 +1,6 @@
 use darling::{FromMeta, ast::NestedMeta};
 use proc_macro::TokenStream as TokenStream1;
 use quote::ToTokens;
-use syn::parse_macro_input;

 mod cdef;
 mod metatype;
@@ -17,8 +16,10 @@ pub fn cdef(args: TokenStream1, input: TokenStream1) -> TokenStream1 {
 }

 #[proc_macro_attribute]
-pub fn metatype(_args: TokenStream1, input: TokenStream1) -> TokenStream1 {
-    metatype::transform(parse_macro_input!(input))
+pub fn metatype(args: TokenStream1, input: TokenStream1) -> TokenStream1 {
+    NestedMeta::parse_meta_list(args.into())
+        .and_then(|meta| metatype::Args::from_list(&meta).map_err(Into::into))
+        .and_then(|args| metatype::transform(args, syn::parse(input)?))
        .unwrap_or_else(|err| err.into_compile_error().into_token_stream())
        .into()
 }
--- a/crates/luaffi_impl/src/metatype.rs
+++ b/crates/luaffi_impl/src/metatype.rs
@@ -1,22 +1,27 @@
 use crate::utils::{
-    ffi_crate, is_primitivelike, is_unit, pat_ident, syn_assert, syn_error, ty_name,
+    StringLike, ffi_crate, is_optionlike, is_primitivelike, is_stringlike, is_unit, pat_ident,
+    syn_assert, syn_error, ty_name,
 };
+use darling::FromMeta;
 use proc_macro2::TokenStream;
 use quote::{ToTokens, format_ident, quote, quote_spanned};
 use std::{collections::HashSet, fmt, iter};
 use syn::{ext::IdentExt, spanned::Spanned, *};

-pub fn transform(mut imp: ItemImpl) -> Result<TokenStream> {
+#[derive(Debug, FromMeta)]
+pub struct Args {}
+
+pub fn transform(args: Args, mut imp: ItemImpl) -> Result<TokenStream> {
    syn_assert!(
        imp.generics.params.is_empty(),
        imp.generics,
        "cannot be generic (not yet implemented)"
    );

-    let impls = generate_impls(&mut imp)?;
+    let impls = generate_impls(&args, &mut imp)?;
    let mod_name = format_ident!("__{}_metatype", ty_name(&imp.self_ty)?);

-    Ok(quote!(
+    Ok(quote_spanned!(imp.self_ty.span() =>
        #imp

        #[doc(hidden)]
@@ -29,15 +34,50 @@ pub fn transform(mut imp: ItemImpl) -> Result<TokenStream> {
    ))
 }

-fn generate_impls(imp: &mut ItemImpl) -> Result<TokenStream> {
+struct Registry {
+    ty: Ident,
+    shims: Vec<ImplItemFn>,
+    build: Vec<TokenStream>,
+}
+
+impl Registry {
+    fn new(ty: Ident) -> Self {
+        Self {
+            ty,
+            shims: vec![],
+            build: vec![],
+        }
+    }
+}
+
+fn generate_impls(_args: &Args, imp: &mut ItemImpl) -> Result<TokenStream> {
    let ffi = ffi_crate();
    let ty = imp.self_ty.clone();
    let ty_name = ty_name(&ty)?;
-    let mut ffi_funcs = FfiRegistry::new(ty_name.clone());
-    let mut lua_funcs = LuaRegistry::new(ty_name.clone());
+    let mut registry = Registry::new(ty_name.clone());
    let mut mms = HashSet::new();
    let mut lua_drop = None;

+    // process lua includes
+    imp.attrs.retain(|attr| {
+        if attr.path().is_ident("include") {
+            if let Ok(path) = attr.parse_args::<LitStr>() {
+                registry.build.push(quote_spanned!(path.span() =>
+                    b.include_lua(::std::include_str!(#path));
+                ));
+                return false;
+            } else if let Ok(chunk) = attr.parse_args::<Block>() {
+                registry.build.push(quote_spanned!(chunk.span() =>
+                    b.include_lua(#ffi::__internal::luaify_chunk!(#chunk));
+                ));
+                return false;
+            }
+        }
+
+        true
+    });
+
+    // process extern "Lua-C" ffi functions
    for func in get_ffi_functions(imp)? {
        if let Some(mm) = func.attrs.metamethod {
            syn_assert!(
@@ -47,9 +87,10 @@ fn generate_impls(imp: &mut ItemImpl) -> Result<TokenStream> {
            );
        }

-        add_ffi_function(&mut ffi_funcs, &func)?;
+        add_ffi_function(&mut registry, &func)?;
    }

+    // process extern "Lua" lua functions
    for func in get_lua_functions(imp)? {
        if let Some(mm) = func.attrs.metamethod {
            syn_assert!(
@@ -59,38 +100,35 @@ fn generate_impls(imp: &mut ItemImpl) -> Result<TokenStream> {
            );
        }

-        if func.attrs.metamethod == Some(Metamethod::Gc) {
+        if let Some(Metamethod::Gc) = func.attrs.metamethod {
            lua_drop = Some(func);
        } else {
-            add_lua_function(&mut lua_funcs, &func)?;
+            add_lua_function(&mut registry, &func)?;
        }
    }

+    // if no #[new] metamethod is defined, inject fallback new
    if !mms.contains(&Metamethod::New) {
-        inject_fallback_new(&mut lua_funcs)?;
+        inject_fallback_new(&mut registry)?;
    }

-    inject_merged_drop(&mut ffi_funcs, lua_drop.as_ref())?;
+    // inject __gc/drop
+    inject_merged_drop(&mut registry, lua_drop.as_ref())?;

-    let ffi_shims = &ffi_funcs.shims;
-    let ffi_build = &ffi_funcs.build;
-    let lua_build = &lua_funcs.build;
-    let ffi_exports = generate_ffi_exports(&ffi_funcs)?;
+    let shims = &registry.shims;
+    let build = &registry.build;
+    let exports = generate_ffi_exports(&registry)?;

-    Ok(quote! {
-        impl #ty { #(#ffi_shims)* }
+    Ok(quote_spanned!(ty.span() =>
+        impl #ty { #(#shims)* }

        unsafe impl #ffi::Metatype for #ty {
            type Target = Self;
-
-            fn build(b: &mut #ffi::MetatypeBuilder) {
-                #(#ffi_build)*
-                #(#lua_build)*
-            }
+            fn build(b: &mut #ffi::MetatypeBuilder) { #(#build)* }
        }

-        #ffi_exports
-    })
+        #exports
+    ))
 }

 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
@@ -201,9 +239,15 @@ fn get_ffi_functions(imp: &mut ItemImpl) -> Result<Vec<FfiFunction>> {
            && let Some(ref abi) = abi.name
            && abi.value() == "Lua-C"
        {
+            syn_assert!(
+                func.sig.generics.params.len() == 0,
+                func.sig.generics,
+                "cannot be generic"
+            );
+
            func.sig.abi = None;

-            let params = func
+            let params: Vec<_> = func
                .sig
                .inputs
                .iter()
@@ -221,8 +265,28 @@ fn get_ffi_functions(imp: &mut ItemImpl) -> Result<Vec<FfiFunction>> {
                ReturnType::Type(_, ref ty) => (**ty).clone(),
            };

+            for param in params.iter() {
+                // double underscores are reserved for generated glue code
+                syn_assert!(
+                    !pat_ident(&param.pat)?.to_string().starts_with("__"),
+                    param.pat,
+                    "parameter names should not start with `__`"
+                );
+
+                // lifetime should be determined by the caller (lua)
+                if let Type::Reference(ref ty) = *param.ty {
+                    syn_assert!(
+                        ty.lifetime.is_none(),
+                        ty.lifetime,
+                        "lifetime should be determined by the caller"
+                    );
+                }
+            }
+
            let attrs = parse_ffi_function_attrs(&mut func.attrs)?;
            attrs.metamethod.map(|mm| document_metamethod(func, mm));
+            func.sig.asyncness.is_some().then(|| document_async(func));
+            document_ffi_function(func);

            funcs.push(FfiFunction {
                name: func.sig.ident.clone(),
@@ -242,7 +306,7 @@ fn parse_ffi_function_attrs(attrs: &mut Vec<Attribute>) -> Result<FfiFunctionAtt
    let mut i = 0;
    while let Some(attr) = attrs.get(i) {
        if let Some(name) = attr.path().get_ident()
-            && let Ok(method) = Metamethod::try_from(name)
+            && let Ok(method) = Metamethod::try_from(&name.unraw())
        {
            match method {
                Metamethod::Gc => syn_error!(attr, "implement `Drop` instead"),
@@ -259,14 +323,26 @@ fn parse_ffi_function_attrs(attrs: &mut Vec<Attribute>) -> Result<FfiFunctionAtt
    Ok(parsed)
 }

+#[derive(Debug, Clone, Copy)]
 enum FfiParameterType {
    Default,
+    StringLike(StringLike),
+    OptionStringLike(StringLike),
 }

-fn get_ffi_param_type(_ty: &Type) -> FfiParameterType {
+fn get_ffi_param_type(ty: &Type) -> FfiParameterType {
+    if let Some(str) = is_stringlike(ty) {
+        FfiParameterType::StringLike(str)
+    } else if let Some(arg) = is_optionlike(ty)
+        && let Some(str) = is_stringlike(arg)
+    {
+        FfiParameterType::OptionStringLike(str)
+    } else {
        FfiParameterType::Default
    }
+}

+#[derive(Debug, Clone, Copy)]
 enum FfiReturnType {
    Void,
    ByValue,
@@ -296,23 +372,7 @@ fn get_ffi_ret_type(ty: &Type) -> FfiReturnType {
    }
 }

-struct FfiRegistry {
-    ty: Ident,
-    shims: Vec<ImplItemFn>,
-    build: Vec<TokenStream>,
-}
-
-impl FfiRegistry {
-    fn new(ty: Ident) -> Self {
-        Self {
-            ty,
-            shims: vec![],
-            build: vec![],
-        }
-    }
-}
-
-fn add_ffi_function(registry: &mut FfiRegistry, func: &FfiFunction) -> Result<()> {
+fn add_ffi_function(registry: &mut Registry, func: &FfiFunction) -> Result<()> {
    let ffi = ffi_crate();
    let ty = &registry.ty;
    let func_name = &func.name;
@@ -364,6 +424,41 @@ fn add_ffi_function(registry: &mut FfiRegistry, func: &FfiFunction) -> Result<()
                    b.param::<#func_param>(#name);
                ));
            }
+            ty @ (FfiParameterType::StringLike(str) | FfiParameterType::OptionStringLike(str)) => {
+                let shim_param_len = format_ident!("arg{i}_len");
+                shim_params.push(quote_spanned!(func_param.span() =>
+                    #shim_param: ::std::option::Option<&::std::primitive::u8>,
+                    #shim_param_len: ::std::primitive::usize
+                ));
+                let allow_nil = matches!(ty, FfiParameterType::OptionStringLike(_));
+                let check_utf8 = matches!(str, StringLike::Str);
+                let mut func_arg = quote_spanned!(func_param.span() =>
+                    #shim_param.map(|s| ::std::slice::from_raw_parts(s, #shim_param_len))
+                );
+                func_arg = match str {
+                    StringLike::SliceU8 => func_arg,
+                    StringLike::BStr => {
+                        quote_spanned!(func_param.span() => #func_arg.map(::bstr::BStr::new))
+                    }
+                    StringLike::Str => {
+                        quote_spanned!(func_param.span() => #func_arg.map(|s| {
+                            ::std::debug_assert!(::std::str::from_utf8(s).is_ok());
+                            ::std::str::from_utf8_unchecked(s)
+                        }))
+                    }
+                };
+                if !allow_nil {
+                    func_arg = quote_spanned!(func_param.span() => {
+                        let arg = #func_arg;
+                        ::std::debug_assert!(arg.is_some());
+                        arg.unwrap_unchecked()
+                    });
+                }
+                func_args.push(func_arg);
+                build.push(quote_spanned!(param.pat.span() =>
+                    b.param_str(#name, #allow_nil, #check_utf8);
+                ));
+            }
        }
    }

@@ -392,8 +487,12 @@ fn add_ffi_function(registry: &mut FfiRegistry, func: &FfiFunction) -> Result<()
                    <#func_ret as #ffi::IntoFfi>::convention() == #ffi::FfiReturnConvention::ByOutParam
                ));

-                shim_params.insert(0, quote!(out: *mut #shim_ret));
-                (shim_body, shim_ret) = (quote!(::std::ptr::write(out, #shim_body)), quote!(()));
+                shim_params.insert(0, quote_spanned!(func_ret.span() => out: *mut #shim_ret));
+
+                (shim_body, shim_ret) = (
+                    quote_spanned!(func_ret.span() => ::std::ptr::write(out, #shim_body)),
+                    quote_spanned!(func_ret.span() => ()),
+                );
            }
        };
    }
@@ -417,19 +516,23 @@ fn add_ffi_function(registry: &mut FfiRegistry, func: &FfiFunction) -> Result<()
    ));

    registry.build.push(match func.attrs.metamethod {
-        Some(ref mm) => quote!(b.metatable(#mm, |b| { #(#build)* });),
-        None => quote!(b.index(#lua_name, |b| { #(#build)* });),
+        Some(ref mm) => quote_spanned!(func_name.span() =>
+            b.metatable(#mm, |b| { #(#build)* });
+        ),
+        None => quote_spanned!(func_name.span() =>
+            b.index(#lua_name, |b| { #(#build)* });
+        ),
    });

    registry.shims.push(parse_quote_spanned!(func_name.span() =>
        #[unsafe(export_name = #c_name)]
-        unsafe extern "C" fn #shim_name(#(#shim_params),*) -> #shim_ret { #shim_body }
+        unsafe extern "C" fn #shim_name(#(#shim_params),*) -> #shim_ret { unsafe { #shim_body } }
    ));

    Ok(())
 }

-fn generate_ffi_exports(registry: &FfiRegistry) -> Result<TokenStream> {
+fn generate_ffi_exports(registry: &Registry) -> Result<TokenStream> {
    let ty = &registry.ty;
    let names = registry.shims.iter().map(|f| &f.sig.ident);

@@ -464,6 +567,18 @@ fn get_lua_functions(imp: &mut ItemImpl) -> Result<Vec<LuaFunction>> {
            && let Some(ref abi) = abi.name
            && abi.value() == "Lua"
        {
+            syn_assert!(
+                func.sig.generics.params.len() == 0,
+                func.sig.generics,
+                "cannot be generic"
+            );
+
+            syn_assert!(
+                func.sig.constness.is_none(),
+                func.sig.constness,
+                "cannot be const"
+            );
+
            let mut params: Vec<_> = func
                .sig
                .inputs
@@ -484,6 +599,8 @@ fn get_lua_functions(imp: &mut ItemImpl) -> Result<Vec<LuaFunction>> {

            let attrs = parse_lua_function_attrs(&mut func.attrs)?;
            attrs.metamethod.map(|mm| document_metamethod(func, mm));
+            func.sig.asyncness.is_some().then(|| document_async(func));
+            document_lua_function(func);

            funcs.push(LuaFunction {
                name: func.sig.ident.clone(),
@@ -506,9 +623,10 @@ fn stub_lua_function(func: &mut ImplItemFn) -> Result<()> {
    // documentation generation
    func.sig.abi = None;
    func.attrs.push(parse_quote!(#[allow(unused)]));
-    func.block = parse_quote!({
+    func.block.stmts.clear();
+    func.block.stmts.push(parse_quote!(
        ::std::unreachable!("cannot call lua function from rust");
-    });
+    ));

    let inputs = &mut func.sig.inputs;
    let output = &mut func.sig.output;
@@ -544,6 +662,7 @@ fn stub_lua_type(ty: &Type) -> Result<Type> {
    } else {
        match ty_name(ty)?.to_string().as_str() {
            "any" => quote_spanned!(span => any),
+            "many" => quote_spanned!(span => many),
            "nil" => quote_spanned!(span => nil),
            "boolean" => quote_spanned!(span => boolean),
            "lightuserdata" => quote_spanned!(span => lightuserdata),
@@ -567,7 +686,7 @@ fn parse_lua_function_attrs(attrs: &mut Vec<Attribute>) -> Result<LuaFunctionAtt
    let mut i = 0;
    while let Some(attr) = attrs.get(i) {
        if let Some(name) = attr.path().get_ident()
-            && let Ok(method) = Metamethod::try_from(name)
+            && let Ok(method) = Metamethod::try_from(&name.unraw())
        {
            match method {
                Metamethod::New => syn_error!(attr, r#"cannot be applied to a lua function"#),
@@ -584,63 +703,27 @@ fn parse_lua_function_attrs(attrs: &mut Vec<Attribute>) -> Result<LuaFunctionAtt
    Ok(parsed)
 }

-struct LuaRegistry {
-    ty: Ident,
-    build: Vec<TokenStream>,
-}
-
-impl LuaRegistry {
-    fn new(ty: Ident) -> Self {
-        Self { ty, build: vec![] }
-    }
-}
-
-fn add_lua_function(registry: &mut LuaRegistry, func: &LuaFunction) -> Result<()> {
+fn add_lua_function(registry: &mut Registry, func: &LuaFunction) -> Result<()> {
    let ffi = ffi_crate();
    let luaify = quote!(#ffi::__internal::luaify!);
-    let name = func.name.unraw().to_string();
+    let func_name = &func.name;
    let params = &func.params;
    let body = &func.body;
+    let name = func_name.unraw().to_string();

    registry.build.push(match func.attrs.metamethod {
-        Some(ref mm) => quote!(b.metatable_raw(#mm, #luaify(|#(#params),*| #body));),
-        None => quote!(b.index_raw(#name, #luaify(|#(#params),*| #body));),
+        Some(ref mm) => quote_spanned!(func_name.span() =>
+            b.metatable_raw(#mm, #luaify(|#(#params),*| #body));
+        ),
+        None => quote_spanned!(func_name.span() =>
+            b.index_raw(#name, #luaify(|#(#params),*| #body));
+        ),
    });

    Ok(())
 }

-fn document_metamethod(func: &mut ImplItemFn, method: Metamethod) {
-    let s = match method {
-        Metamethod::Eq => "This is a metamethod which is called by the `==` operator.".into(),
-        Metamethod::Len => "This is a metamethod which is called by the `#` operator.".into(),
-        Metamethod::Lt => "This is a metamethod which is called by the `<` operator.".into(),
-        Metamethod::Le => "This is a metamethod which is called by the `<=` operator.".into(),
-        Metamethod::Concat => "This is a metamethod which is called by the `..` operator.".into(),
-        Metamethod::Add => "This is a metamethod which is called by the `+` operator.".into(),
-        Metamethod::Sub => "This is a metamethod which is called by the `-` operator.".into(),
-        Metamethod::Mul => "This is a metamethod which is called by the `*` operator.".into(),
-        Metamethod::Div => "This is a metamethod which is called by the `/` operator.".into(),
-        Metamethod::Mod => "This is a metamethod which is called by the `%` operator.".into(),
-        Metamethod::Pow => "This is a metamethod which is called by the `^` operator.".into(),
-        Metamethod::Unm => "This is a metamethod which is called by the `-` operator.".into(),
-        Metamethod::ToString => {
-            "This is a metamethod which can be called by the `tostring` built-in function.".into()
-        }
-        Metamethod::Pairs => {
-            "This is a metamethod which can be called by the `pairs` built-in function.".into()
-        }
-        Metamethod::Ipairs => {
-            "This is a metamethod which can be called by the `ipairs` built-in function.".into()
-        }
-        _ => format!("This is a metamethod and cannot be called directly."),
-    };
-
-    func.attrs.push(parse_quote!(#[doc = ""]));
-    func.attrs.push(parse_quote!(#[doc = #s]));
-}
-
-fn inject_fallback_new(registry: &mut LuaRegistry) -> Result<()> {
+fn inject_fallback_new(registry: &mut Registry) -> Result<()> {
    let ty = &registry.ty;
    let lua = format!(
        r#"function() error("type '{}' has no constructor"); end"#,
@@ -654,7 +737,7 @@ fn inject_fallback_new(registry: &mut LuaRegistry) -> Result<()> {
    Ok(())
 }

-fn inject_merged_drop(registry: &mut FfiRegistry, lua: Option<&LuaFunction>) -> Result<()> {
+fn inject_merged_drop(registry: &mut Registry, lua: Option<&LuaFunction>) -> Result<()> {
    let ffi = ffi_crate();
    let luaify = quote!(#ffi::__internal::luaify!);
    let ty = &registry.ty;
@@ -669,11 +752,17 @@ fn inject_merged_drop(registry: &mut FfiRegistry, lua: Option<&LuaFunction>) ->
            "finaliser must take exactly one parameter"
        );

+        match lua.params[0] {
+            // should be `self: cdata` PatType
+            Pat::Type(ref ty) => {
                syn_assert!(
-            pat_ident(&lua.params[0])? == "self",
+                    pat_ident(&ty.pat)? == "self",
                    lua.params[0],
                    "finaliser parameter must be `self`"
                );
+            }
+            _ => syn_error!(lua.params[0], "finaliser parameter must be `self`"),
+        }

        let params = &lua.params;
        let body = &lua.body;
@@ -711,3 +800,58 @@ fn inject_merged_drop(registry: &mut FfiRegistry, lua: Option<&LuaFunction>) ->

    Ok(())
 }
+
+fn document_ffi_function(func: &mut ImplItemFn) {
+    func.attrs.insert(0, parse_quote!(#[doc =
+        r#"<span class="stab" title="This function is implemented in Rust and called via FFI." style="float: right; background: #fff5d6; font-weight: 500; margin-left: 3px; padding-left: 5px; padding-right: 5px;">FFI</span>"#
+    ]));
+}
+
+fn document_lua_function(func: &mut ImplItemFn) {
+    func.attrs.insert(0, parse_quote!(#[doc =
+        r#"<span class="stab" title="This function is implemented in Lua." style="float: right; background: #ebf5ff; font-weight: 500; margin-left: 3px; padding-left: 5px; padding-right: 5px;">Lua</span>"#
+    ]));
+}
+
+fn document_async(func: &mut ImplItemFn) {
+    func.attrs.insert(0, parse_quote!(#[doc =
+        r#"<span class="stab" title="This function is asynchronous." style="float: right; background: #ebf5ff; margin-left: 3px; padding-left: 5px; padding-right: 5px;">Async</span>"#
+    ]));
+}
+
+fn document_metamethod(func: &mut ImplItemFn, method: Metamethod) {
+    let s = match method {
+        Metamethod::Eq => "This is a metamethod which is called by the `==` operator.",
+        Metamethod::Len => "This is a metamethod which is called by the `#` operator.",
+        Metamethod::Lt => "This is a metamethod which is called by the `<` operator.",
+        Metamethod::Le => "This is a metamethod which is called by the `<=` operator.",
+        Metamethod::Concat => "This is a metamethod which is called by the `..` operator.",
+        Metamethod::Call => {
+            "This is a metamethod which can be called by calling `(...)` on the value directly."
+        }
+        Metamethod::Add => "This is a metamethod which is called by the `+` operator.",
+        Metamethod::Sub => "This is a metamethod which is called by the `-` operator.",
+        Metamethod::Mul => "This is a metamethod which is called by the `*` operator.",
+        Metamethod::Div => "This is a metamethod which is called by the `/` operator.",
+        Metamethod::Mod => "This is a metamethod which is called by the `%` operator.",
+        Metamethod::Pow => "This is a metamethod which is called by the `^` operator.",
+        Metamethod::Unm => "This is a metamethod which is called by the `-` operator.",
+        Metamethod::ToString => {
+            "This is a metamethod which is called by the [`tostring(...)`](https://www.lua.org/manual/5.1/manual.html#pdf-tostring) built-in function."
+        }
+        Metamethod::Pairs => {
+            "This is a metamethod which is called by the [`pairs(...)`](https://www.lua.org/manual/5.1/manual.html#pdf-pairs) built-in function."
+        }
+        Metamethod::Ipairs => {
+            "This is a metamethod which is called by the [`ipairs(...)`](https://www.lua.org/manual/5.1/manual.html#pdf-ipairs) built-in function."
+        }
+        _ => "This is a metamethod and cannot be called directly.",
+    };
+
+    func.attrs.insert(0, parse_quote!(#[doc =
+        r#"<span class="stab" title="This function is a metamethod." style="float: right; background: #ebf5ff; margin-left: 3px; padding-left: 5px; padding-right: 5px;">Metamethod</span>"#
+    ]));
+
+    func.attrs.push(parse_quote!(#[doc = ""]));
+    func.attrs.push(parse_quote!(#[doc = #s]));
+}
--- a/crates/luaffi_impl/src/utils.rs
+++ b/crates/luaffi_impl/src/utils.rs
@@ -1,5 +1,5 @@
 use std::env;
-use syn::{spanned::Spanned, *};
+use syn::{ext::IdentExt, spanned::Spanned, *};

 macro_rules! syn_error {
    ($src:expr, $($fmt:expr),+) => {{
@@ -57,13 +57,13 @@ pub fn is_unit(ty: &Type) -> bool {

 pub fn is_primitivelike(ty: &Type) -> bool {
    match ty {
-        Type::Tuple(tuple) if tuple.elems.is_empty() => true, // unit type
-        Type::Reference(_) | Type::Ptr(_) => true,
-        Type::Paren(paren) => is_primitivelike(&paren.elem),
+        Type::Tuple(tuple) if tuple.elems.is_empty() => return true, // unit type
+        Type::Reference(_) | Type::Ptr(_) => return true,
+        Type::Paren(paren) => return is_primitivelike(&paren.elem),
        Type::Path(path) => {
            if let Some(name) = path.path.get_ident() {
-                matches!(
-                    format!("{name}").as_str(),
+                return matches!(
+                    name.unraw().to_string().as_str(),
                    "bool"
                        | "u8"
                        | "u16"
@@ -94,11 +94,72 @@ pub fn is_primitivelike(ty: &Type) -> bool {
                        | "c_size_t"
                        | "c_ssize_t"
                        | "c_ptrdiff_t"
-                )
-            } else {
+                );
+            }
+        }
+        _ => {}
+    }
+
    false
 }
+
+#[derive(Debug, Clone, Copy)]
+pub enum StringLike {
+    SliceU8,
+    Str,
+    BStr,
 }
-        _ => false,
+
+pub fn is_stringlike(ty: &Type) -> Option<StringLike> {
+    if let Type::Reference(ty) = ty
+        && ty.mutability.is_none()
+        && ty.lifetime.is_none()
+    {
+        Some(match *ty.elem {
+            Type::Slice(ref slice) => {
+                // match &[u8]
+                if let Type::Path(ref path) = *slice.elem
+                    && let Some(name) = path.path.get_ident()
+                {
+                    match name.unraw().to_string().as_str() {
+                        "u8" => StringLike::SliceU8,
+                        _ => return None,
+                    }
+                } else {
+                    return None;
+                }
+            }
+            Type::Path(ref path) => {
+                // match &str or &BStr
+                if let Some(name) = path.path.get_ident() {
+                    match name.unraw().to_string().as_str() {
+                        "str" => StringLike::Str,
+                        "BStr" => StringLike::BStr,
+                        _ => return None,
+                    }
+                } else {
+                    return None;
+                }
+            }
+            _ => return None,
+        })
+    } else {
+        None
+    }
+}
+
+pub fn is_optionlike(ty: &Type) -> Option<&Type> {
+    if let Type::Path(path) = ty
+        && path.path.leading_colon.is_none()
+        && path.path.segments.len() == 1
+        && let Some(segment) = path.path.segments.get(0)
+        && segment.ident == "Option"
+        && let PathArguments::AngleBracketed(ref angle) = segment.arguments
+        && angle.args.len() == 1
+        && let Some(GenericArgument::Type(ty)) = angle.args.get(0)
+    {
+        Some(ty)
+    } else {
+        None
    }
 }
--- a/crates/luaify/Cargo.toml
+++ b/crates/luaify/Cargo.toml
@@ -1,7 +1,11 @@
 [package]
 name = "luaify"
-version = "0.1.0"
-edition = "2024"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true

 [lib]
 proc-macro = true
@@ -10,3 +14,6 @@ proc-macro = true
 proc-macro2 = "1.0.95"
 quote = "1.0.40"
 syn = { version = "2.0.103", features = ["full", "visit-mut"] }
+
+[dev-dependencies]
+pretty_assertions = "1.4.1"
--- a/crates/luaify/src/generate.rs
+++ b/crates/luaify/src/generate.rs
@@ -14,6 +14,12 @@ pub fn generate(expr: &Expr) -> Result<TokenStream> {
    Ok(f.done())
 }

+pub fn generate_chunk(block: &Block) -> Result<TokenStream> {
+    let mut f = Formatter::default();
+    generate_block(&mut f, &block, Context::stmt(false))?;
+    Ok(f.done())
+}
+
 #[derive(Default)]
 struct Formatter {
    buf: String,
--- a/crates/luaify/src/lib.rs
+++ b/crates/luaify/src/lib.rs
@@ -1,4 +1,7 @@
-use crate::{generate::generate, transform::transform};
+use crate::{
+    generate::{generate, generate_chunk},
+    transform::{transform, transform_chunk},
+};
 use proc_macro::TokenStream as TokenStream1;
 use quote::ToTokens;
 use syn::parse_macro_input;
@@ -16,3 +19,13 @@ pub fn luaify(input: TokenStream1) -> TokenStream1 {
    }
    .into()
 }
+
+#[proc_macro]
+pub fn luaify_chunk(input: TokenStream1) -> TokenStream1 {
+    let mut block = parse_macro_input!(input);
+    match transform_chunk(&mut block).and_then(|()| generate_chunk(&block)) {
+        Ok(s) => s,
+        Err(err) => err.into_compile_error().into_token_stream(),
+    }
+    .into()
+}
--- a/crates/luaify/src/transform.rs
+++ b/crates/luaify/src/transform.rs
@@ -9,6 +9,12 @@ pub fn transform(expr: &mut Expr) -> Result<()> {
    visitor.result
 }

+pub fn transform_chunk(block: &mut Block) -> Result<()> {
+    let mut visitor = Visitor::new();
+    visitor.visit_block_mut(block);
+    visitor.result
+}
+
 #[derive(Debug)]
 struct Visitor {
    result: Result<()>,
--- a/crates/luaify/tests/test.rs
+++ b/crates/luaify/tests/test.rs
@@ -1,4 +1,5 @@
-use luaify::luaify;
+use luaify::{luaify, luaify_chunk};
+use pretty_assertions::assert_eq;

 #[test]
 fn raw_ident() {
@@ -402,3 +403,19 @@ fn length() {
        r#"local a,b,c=#a,#b,#c;"#
    );
 }
+
+#[test]
+fn chunk() {
+    assert_eq!(
+        luaify_chunk!({
+            if a == b {
+                c()
+            } else if b == c {
+                a()
+            } else {
+                d()
+            }
+        }),
+        "if a==b then c();elseif b==c then a();else d();end;"
+    );
+}
--- a/crates/luajit-sys/Cargo.toml
+++ b/crates/luajit-sys/Cargo.toml
@@ -1,7 +1,11 @@
 [package]
 name = "luajit-sys"
-version = "0.1.0"
-edition = "2024"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true

 [lib]
 path = "lib.rs"
--- a/crates/luajit/Cargo.toml
+++ b/crates/luajit/Cargo.toml
@@ -1,7 +1,11 @@
 [package]
 name = "luajit"
-version = "0.1.0"
-edition = "2024"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true

 [features]
 runtime = ["luajit-sys/runtime"]
@@ -10,6 +14,6 @@ unwind = ["luajit-sys/unwind"]
 [dependencies]
 bitflags = { version = "2.9.1", features = ["std"] }
 bstr = "1.12.0"
-luaffi = { version = "0.1.0", path = "../luaffi" }
-luajit-sys = { version = "0.1.0", path = "../luajit-sys" }
+luaffi = { path = "../luaffi" }
+luajit-sys = { path = "../luajit-sys" }
 thiserror = "2.0.12"
--- a/crates/luajit/src/lib.rs
+++ b/crates/luajit/src/lib.rs
@@ -9,6 +9,7 @@ use std::{
    ffi::{CStr, CString, NulError},
    fmt,
    marker::PhantomData,
+    mem::ManuallyDrop,
    ops::{Deref, DerefMut},
    os::raw::{c_char, c_int, c_void},
    pin::Pin,
@@ -25,6 +26,21 @@ pub fn version() -> &'static str {
    LUAJIT_VERSION.to_str().unwrap()
 }

+/// LuaJIT copyright string.
+pub fn copyright() -> &'static str {
+    LUAJIT_COPYRIGHT.to_str().unwrap()
+}
+
+/// LuaJIT URL string.
+pub fn url() -> &'static str {
+    LUAJIT_URL.to_str().unwrap()
+}
+
+// reexport constants
+pub use luajit_sys::{
+    LUA_ENVIRONINDEX, LUA_GLOBALSINDEX, LUA_MULTRET, LUA_NOREF, LUA_REFNIL, LUA_REGISTRYINDEX,
+};
+
 /// Lua error.
 #[derive(Debug, Error)]
 #[non_exhaustive]
@@ -467,6 +483,19 @@ pub struct Ref {
    key: c_int,
 }

+impl Ref {
+    /// Consumes this ref and returns the original key used to create the ref.
+    ///
+    /// This key can be used to index into the registry table ([`LUA_REGISTRYINDEX`]) to retrieve
+    /// the referenced value. The key can be converted back into a ref using
+    /// [`State::new_ref_unchecked`].
+    pub fn into_raw(self) -> c_int {
+        let Self { ref mut state, key } = *ManuallyDrop::new(self);
+        unsafe { ptr::drop_in_place(state) }
+        key
+    }
+}
+
 impl Drop for Ref {
    fn drop(&mut self) {
        // SAFETY: luaL_unref is guaranteed to not fail
@@ -861,7 +890,7 @@ impl Stack {
    /// array-part, these values are **not** cleared. The number of values popped is returned, which
    /// is always equal to `n`.
    ///
-    /// This method does not invoke any metamethods.
+    /// This method does not invoke any metamethods. The table is not popped from the stack.
    ///
    /// Equivalent to `table.pack(...)`.
    ///
@@ -897,7 +926,8 @@ impl Stack {
    /// pushed at the top of the stack in ascending order. If `i > j`, then nothing is pushed.
    /// Otherwise, `j - i + 1` values are pushed, and the number of values pushed is returned.
    ///
-    /// This method does not invoke any metamethods.
+    /// This method does not invoke any metamethods. The table is not popped from the stack or
+    /// altered in any way.
    ///
    /// Equivalent to `table.unpack(list, i, j)`.
    ///
@@ -1333,8 +1363,7 @@ impl<'s> DerefMut for StackGuard<'s> {

 impl<'s> Drop for StackGuard<'s> {
    fn drop(&mut self) {
-        #[cfg(debug_assertions)]
-        if self.check_overpop {
+        if cfg!(debug_assertions) && self.check_overpop {
            let new_size = self.stack.size();
            assert!(
                self.size <= new_size,
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,2 +1,20 @@
+#[cfg(feature = "task")]
+pub use lb::chan;
+#[cfg(feature = "fs")]
 pub use lb::fs;
+#[cfg(feature = "net")]
 pub use lb::net;
+#[cfg(feature = "task")]
+pub use lb::task;
+
+#[doc(hidden)]
+pub fn open(#[allow(unused)] rt: &mut lb::runtime::Builder) {
+    #[cfg(feature = "task")]
+    rt.module::<task::lb_tasklib>();
+    #[cfg(feature = "task")]
+    rt.module::<chan::lb_chanlib>();
+    #[cfg(feature = "fs")]
+    rt.module::<fs::lb_fslib>();
+    #[cfg(feature = "net")]
+    rt.module::<net::lb_netlib>();
+}
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,7 @@
 use clap::Parser;
 use mimalloc::MiMalloc;
 use owo_colors::OwoColorize;
-use std::{backtrace::Backtrace, fmt::Display, net::SocketAddr, num::NonZero, panic, thread};
+use std::{backtrace::Backtrace, fmt::Display, num::NonZero, panic, process, thread};
 use sysexits::ExitCode;

 #[global_allocator]
@@ -20,21 +20,42 @@ fn panic_cb(panic: &panic::PanicHookInfo) {
    };

    eprint!(
-        "{}:\n{trace}",
+        "{}\n{trace}",
        format_args!(
            "thread '{}' panicked at {location}: {msg}",
            thread::current().name().unwrap_or("<unnamed>")
        )
        .red()
+        .bold()
    );

    eprintln!(
        "{}",
-        "This is a bug in luby. Please kindly report this at https://git.lua.re/luaneko/luby."
+        format_args!(
+            "luby should never panic. Please kindly report this bug at {}.",
+            env!("CARGO_PKG_REPOSITORY")
+        )
        .yellow()
+        .bold()
    );
 }

+fn error_cb(err: &luajit::Error) {
+    match err.trace() {
+        Some(trace) => eprintln!("{}\n{trace}", err.red().bold()),
+        None => eprintln!("{}", err.red().bold()),
+    }
+
+    process::exit(1);
+}
+
+fn unwrap_exit<T, E: Display>(code: ExitCode) -> impl FnOnce(E) -> T {
+    move |err| {
+        eprintln!("{}", err.red().bold());
+        code.exit()
+    }
+}
+
 #[derive(Debug, Parser)]
 struct Args {
    /// Paths to scripts to execute.
@@ -45,7 +66,7 @@ struct Args {
    #[clap(long, short = 'e', value_name = "CHUNK")]
    eval: Vec<String>,

-    /// Libraries to require on startup.
+    /// Libraries to require.
    #[clap(long, short = 'l', value_name = "NAME")]
    lib: Vec<String>,

@@ -54,29 +75,56 @@ struct Args {
    log: tracing::Level,

    /// LuaJIT control commands.
-    #[clap(long, short = 'j', value_name = "CMD=FLAGS")]
+    #[clap(long, short = 'j', help_heading = "Runtime", value_name = "CMD=FLAGS")]
    jit: Vec<String>,

-    /// Number of tokio worker threads.
-    #[clap(long, value_name = "THREADS", default_value_t = Self::threads())]
+    /// Number of worker threads.
+    #[clap(
+        long,
+        short = 'T',
+        help_heading = "Runtime",
+        value_name = "THREADS",
+        default_value_t = Self::threads()
+    )]
    threads: NonZero<usize>,

-    /// Number of tokio blocking threads.
-    #[clap(long, value_name = "THREADS", default_value_t = Self::blocking_threads())]
+    /// Number of blocking threads.
+    #[clap(
+        long,
+        help_heading = "Runtime",
+        value_name = "THREADS",
+        default_value_t = Self::blocking_threads()
+    )]
    blocking_threads: NonZero<usize>,

    /// Enable tokio-console integration.
-    #[clap(long)]
+    #[cfg(feature = "tokio-console")]
+    #[clap(long, help_heading = "Debugging")]
    enable_console: bool,

    /// tokio-console publish address.
+    #[cfg(feature = "tokio-console")]
    #[clap(
        long,
+        help_heading = "Debugging",
        value_name = "ADDRESS",
        default_value = "127.0.0.1:6669",
        requires = "enable_console"
    )]
-    console_addr: SocketAddr,
+    console_addr: std::net::SocketAddr,
+
+    /// Dump internal data.
+    #[clap(
+        long,
+        help_heading = "Debugging",
+        value_name = "DATA",
+        value_parser = ["cdef"]
+    )]
+    dump: Vec<String>,
+
+    /// Print version.
+    #[clap(long, short = 'V')]
+    version: bool,
 }

 impl Args {
@@ -89,17 +137,14 @@ impl Args {
    }
 }

-fn exit_err<T, E: Display>(code: ExitCode) -> impl FnOnce(E) -> T {
-    move |err| {
-        eprintln!("{}", err.red());
-        code.exit()
-    }
-}
-
 fn main() -> Result<(), ExitCode> {
    panic::set_hook(Box::new(panic_cb));

    let args = Args::parse();
+    if args.version {
+        return Ok(print_version());
+    }
+
    init_logger(&args);

    let tokio = init_tokio(&args);
@@ -112,9 +157,21 @@ fn main() -> Result<(), ExitCode> {
    })
 }

+fn print_version() {
+    println!("luby {}", env!("VERGEN_GIT_DESCRIBE"));
+    println!("{}\n", env!("CARGO_PKG_HOMEPAGE"));
+    println!("Compiled with {} -- {}", luajit::version(), luajit::url());
+    println!(
+        "Compiled with rustc {} on {} for {}",
+        env!("VERGEN_RUSTC_SEMVER"),
+        env!("VERGEN_RUSTC_HOST_TRIPLE"),
+        env!("VERGEN_CARGO_TARGET_TRIPLE"),
+    );
+}
+
 fn init_logger(args: &Args) {
    use tracing::level_filters::LevelFilter;
-    use tracing_subscriber::{Layer, util::*};
+    use tracing_subscriber::util::*;

    let log = tracing_subscriber::fmt()
        .compact()
@@ -128,61 +185,75 @@ fn init_logger(args: &Args) {
        .with_target(false)
        .finish();

-    if args.enable_console {
+    #[cfg(feature = "tokio-console")]
+    {
+        use tracing_subscriber::Layer;
        console_subscriber::ConsoleLayer::builder()
            .with_default_env()
            .server_addr(args.console_addr)
            .spawn()
            .with_subscriber(log)
-            .init()
-    } else {
-        log.init()
+            .init();
    }
+
+    #[cfg(not(feature = "tokio-console"))]
+    log.init();
 }

 fn init_tokio(args: &Args) -> tokio::runtime::Runtime {
-    let mut rt = match args.threads.get() {
+    match args.threads.get() {
        1 => tokio::runtime::Builder::new_current_thread(),
        n => {
            let mut rt = tokio::runtime::Builder::new_multi_thread();
            rt.worker_threads(n - 1);
            rt
        }
-    };
-
-    rt.enable_all()
+    }
+    .enable_all()
    .thread_name("luby")
    .max_blocking_threads(args.blocking_threads.get())
    .build()
-        .unwrap_or_else(exit_err(ExitCode::OsErr))
+    .unwrap_or_else(unwrap_exit(ExitCode::OsErr))
 }

 fn init_lua(args: &Args) -> lb::runtime::Runtime {
-    let rt = lb::runtime::Builder::new();
-    let mut rt = rt.build().unwrap_or_else(exit_err(ExitCode::Software));
+    let mut rt = {
+        let mut rt = lb::runtime::Builder::new();
+        luby::open(&mut rt);
+
+        if args.dump.iter().find(|s| *s == "cdef").is_some() {
+            print!("{}", rt.registry()); // for cdef debugging
+        }
+
+        rt.unhandled_error(error_cb).build().unwrap()
+    };

    for arg in args.jit.iter() {
        let mut s = rt.guard();
-        if let Some((cmd, flags)) = parse_jitlib_cmd(arg)
+        let res = if let Some((cmd, flags)) = parse_jitlib_cmd(arg)
            && let Ok(_) = s.require(format!("jit.{cmd}"), 1)
        {
            (s.push("start"), s.get(-2), s.push(flags));
-            s.call(1, 0)
+            s.call(1, 0) // require("jit.{cmd}").start(flags)
        } else {
            s.require("jit", 1).unwrap();
            match arg.as_str() {
                cmd @ ("on" | "off" | "flush") => {
                    (s.push(cmd), s.get(-2));
-                    s.call(0, 0)
+                    s.call(0, 0) // require("jit").[on/off/flush]()
                }
-                arg => {
+                flags => {
                    (s.push("opt"), s.get(-2));
-                    (s.push("start"), s.get(-2), s.push(arg));
-                    s.call(1, 0)
+                    (s.push("start"), s.get(-2), s.push(flags));
+                    s.call(1, 0) // require("jit").opt.start(flags)
                }
            }
+        };
+
+        if let Err(err) = res {
+            drop(s);
+            rt.report_error(&err);
        }
-        .unwrap_or_else(exit_err(ExitCode::Usage));
    }

    rt
@@ -190,34 +261,27 @@ fn init_lua(args: &Args) -> lb::runtime::Runtime {

 fn parse_jitlib_cmd(s: &str) -> Option<(&str, &str)> {
    match s {
-        "p" => Some(("p", "Flspv10")),
-        "v" => Some(("v", "-")),
-        "dump" => Some(("dump", "tirs")),
+        "p" => Some(("p", "Flspv10")),    // default -jp flags
+        "v" => Some(("v", "-")),          // default -jv flags
+        "dump" => Some(("dump", "tirs")), // default -jdump flags
        _ => s.split_once('='),
    }
 }

-async fn main_async(args: Args, state: &mut luajit::State) -> Result<(), ExitCode> {
+async fn main_async(args: Args, cx: &mut lb::runtime::Context) -> Result<(), ExitCode> {
    for ref path in args.path {
-        let mut s = state.guard();
        let chunk = match std::fs::read(path) {
            Ok(chunk) => chunk,
            Err(err) => {
-                eprintln!("{}", format_args!("{path}: {err}").red());
-                ExitCode::NoInput.exit();
+                eprintln!("{}", format_args!("{path}: {err}").red().bold());
+                return Err(ExitCode::NoInput);
            }
        };

-        s.load(&luajit::Chunk::new(chunk).path(path))
-            .unwrap_or_else(exit_err(ExitCode::NoInput));
-
-        if let Err(err) = s.call_async(0, 0).await {
-            match err.trace() {
-                Some(trace) => eprintln!("{}\n{trace}", err.red()), // runtime error
-                None => eprintln!("{}", err.red()),
-            }
-
-            ExitCode::DataErr.exit();
+        if let Err(ref err) = cx.load(&luajit::Chunk::new(chunk).path(path)) {
+            cx.report_error(err);
+        } else if let Err(ref err) = cx.call_async(0, 0).await {
+            cx.report_error(err);
        }
    }

--- a/test.lua
+++ b/test.lua
@@ -1,6 +0,0 @@
-local ffi = require("ffi")
-local lb = ffi.new("struct lb_core")
-
-print(lb)
-
-lb.spawn("")
--- a/tests/main.lua
+++ b/tests/main.lua
@@ -0,0 +1,97 @@
+if (...) ~= nil and (...).type == "group" then return end -- prevent recursive main call
+local fs = require("lb:fs")
+local global = _G
+local colors = {
+  reset = "\x1b[0m",
+  pass = "\x1b[32;1m",
+  fail = "\x1b[31;1m",
+}
+
+local function color(name, s)
+  return colors[name] .. s .. colors.reset
+end
+
+local function create_test(name, f, group)
+  local test = { type = "test", name = name or "", group = group, state = "pending", f = f }
+  local fenv = setmetatable({}, { __index = global })
+  setfenv(f, fenv)
+  return test
+end
+
+local function create_group(name, f, parent)
+  local group = { type = "group", name = name or "", parent = parent, items = {} }
+  local fenv = setmetatable({
+    describe = function(name, f)
+      local item = create_group(name, f, group)
+      table.insert(group.items, item)
+      return item
+    end,
+
+    test = function(name, f)
+      local item = create_test(name, f, group)
+      table.insert(group.items, item)
+      return item
+    end,
+  }, { __index = global })
+
+  setfenv(f, fenv)
+  f(group)
+  return group
+end
+
+local function name_test(test)
+  local name = test.name
+  local group = test.group
+  while group ~= nil do
+    if group.name ~= "" then name = group.name .. " › " .. name end
+    group = group.parent
+  end
+  return name
+end
+
+local function trace(msg)
+  return color("fail", msg) .. debug.traceback("", 2):sub(("\nstack traceback:"):len() + 1)
+end
+
+local function run_test(test)
+  local ok, res = xpcall(test.f, trace, test)
+  if ok then
+    test.state = "pass"
+    print("", color("pass", "PASS") .. " " .. name_test(test))
+  else
+    test.state = "fail"
+    print("", color("fail", "FAIL") .. " " .. name_test(test) .. "\n")
+    print(res .. "\n")
+  end
+  return test
+end
+
+local function start(cx, item)
+  if item.type == "test" then
+    table.insert(cx.tasks, spawn(run_test, item))
+  elseif item.type == "group" then
+    for _, item in ipairs(item.items) do
+      start(cx, item)
+    end
+  end
+end
+
+local function run(item)
+  local cx = { tasks = {} }
+  local pass = true
+  start(cx, item)
+  for _, task in ipairs(cx.tasks) do
+    if task:await().state ~= "pass" then pass = false end
+  end
+  if pass then return 0 end -- report status to cargo
+  return 1
+end
+
+return run(create_group("", function()
+  for entry in fs:glob("{tests,crates/*/tests}/**/*.lua") do
+    local path = entry:path():sub(3)
+    local f, err = loadfile(path)
+    if not f then error(err) end
+    describe(path, f)
+  end
+end))
--- a/tests/main.rs
+++ b/tests/main.rs
@@ -0,0 +1,44 @@
+use luajit::Chunk;
+use owo_colors::OwoColorize;
+use std::{
+    fs,
+    process::{self, ExitCode},
+};
+
+fn main() -> ExitCode {
+    let tokio = tokio::runtime::Runtime::new().unwrap();
+    let lua = {
+        let mut rt = lb::runtime::Builder::new();
+        luby::open(&mut rt);
+        rt.unhandled_error(error_cb).build().unwrap()
+    };
+
+    let path = "tests/main.lua";
+    let main = lua.spawn(async move |s| {
+        if let Err(ref err) = s.load(Chunk::new(fs::read(path).unwrap()).path(path)) {
+            s.report_error(err);
+        } else if let Err(ref err) = s.call_async(0, 1).await {
+            s.report_error(err);
+        }
+
+        if s.slot(1).integer().unwrap_or(1) == 0 {
+            ExitCode::SUCCESS
+        } else {
+            ExitCode::FAILURE
+        }
+    });
+
+    tokio.block_on(async move {
+        lua.await;
+        main.await.unwrap()
+    })
+}
+
+fn error_cb(err: &luajit::Error) {
+    match err.trace() {
+        Some(trace) => eprintln!("{}\n{trace}", err.red().bold()),
+        None => eprintln!("{}", err.red().bold()),
+    }
+
+    process::exit(1);
+}
Author	SHA1	Message	Date
luaneko	3a7f2366e4	Ensure spawn order is consistent	2025-06-27 04:29:11 +10:00
luaneko	8443c44671	Test that task properly unrefs its table	2025-06-27 04:24:10 +10:00
luaneko	72b3afaeea	Add sleep test	2025-06-27 04:11:31 +10:00
luaneko	503985269a	Don't need to run all tests in workspace in bacon	2025-06-27 04:06:45 +10:00
luaneko	0839e7ce9a	Add task spawn tests	2025-06-27 04:06:35 +10:00
luaneko	cdfb2522ac	Add tempdir support	2025-06-27 03:53:08 +10:00
luaneko	0c4639c3e9	Add basic tcp socket test	2025-06-27 03:29:29 +10:00
luaneko	4f548bf9e9	More descriptive parameters	2025-06-27 03:18:25 +10:00
luaneko	40829cdfc6	Implement basic lua test harness	2025-06-27 03:11:49 +10:00
luaneko	db4faea821	Implement walk_dir and more robust globbing	2025-06-27 01:36:08 +10:00
luaneko	2964ebbe1b	Add basic glob function	2025-06-26 23:56:09 +10:00
luaneko	b1572cc9f1	Rename lsdir to read_dir and dirent to dir_entry	2025-06-26 23:24:48 +10:00
luaneko	862fcfe891	Add links to lua pdf in metamethod doc	2025-06-26 23:08:28 +10:00
luaneko	6a194e98e8	Document structs in fslib	2025-06-26 23:08:13 +10:00
luaneko	d2e06c9a70	Add stab tag for async functions	2025-06-26 22:58:30 +10:00
luaneko	679ffed807	Implement lsdir and file info functions	2025-06-26 22:46:27 +10:00
luaneko	549f96d4dc	Warn missing documentation	2025-06-26 21:32:38 +10:00
luaneko	09d7e51345	Add tokio/rt feature only if task feature is enabled	2025-06-26 21:10:07 +10:00
luaneko	8a74ade6a6	Implement task handle awaiting	2025-06-26 20:18:16 +10:00
luaneko	9338be7eb0	Add many lua annotation	2025-06-26 19:25:03 +10:00
luaneko	240e0111bf	Fix lua finaliser parameter check	2025-06-26 19:24:19 +10:00
luaneko	01f459ffaf	Implement task sleep function	2025-06-26 18:47:43 +10:00
luaneko	9b7dbcc141	Implement proper error handlign in spawned tasks	2025-06-26 18:47:31 +10:00
luaneko	24c5e9edc2	Include lb_tasklib::spawn in globals	2025-06-26 17:52:31 +10:00
luaneko	0cafac0948	Let modules decide their own name via #[cdef] macro	2025-06-26 17:47:21 +10:00
luaneko	1c1753234d	Rename MetatypeMethodBuilder to MetatypeFunctionBuilder	2025-06-26 17:12:00 +10:00
luaneko	31b5ff5ab9	Make all modules feature-gated to improve compile time	2025-06-26 16:54:58 +10:00
luaneko	2078dd0d8e	Delete test.lua	2025-06-26 13:57:45 +10:00
luaneko	dfd57e0ad0	Add macro to luaify blocks instead of exprs	2025-06-26 13:57:10 +10:00
luaneko	2a6015c19a	Use pretty assertions in luaify tests	2025-06-26 13:48:54 +10:00
luaneko	88ab48cddb	Modules should be registered in luby not lb	2025-06-26 13:46:39 +10:00
luaneko	bcb734846d	Implement lb_tcpsocket	2025-06-26 13:07:24 +10:00
luaneko	2fe9515702	Add newlines in generated cdef for readability	2025-06-26 13:06:39 +10:00
luaneko	f456a544e1	Disable all lualsp diagnostics in lib.lua	2025-06-26 13:05:50 +10:00
luaneko	ba969b9e56	Rename lb_libx to lb_xlib	2025-06-26 00:40:26 +10:00
luaneko	da5acd6bc8	Add stab tag for metamethods	2025-06-26 00:39:22 +10:00
luaneko	cbb47840e4	Alias stub types to rust types where possible	2025-06-25 23:16:42 +10:00
luaneko	2967513cbb	Allowing dumping generated cdef	2025-06-25 22:48:46 +10:00
luaneko	014687068f	Add file write operations	2025-06-25 22:26:43 +10:00
luaneko	85a0110e1a	Disable warnings in luaffi lib.lua	2025-06-25 22:19:17 +10:00
luaneko	91302db725	Print nicer error messages	2025-06-25 21:45:29 +10:00
luaneko	c249549b3c	Fix unknown feature warning	2025-06-25 21:25:02 +10:00
luaneko	30596d9331	Impl generic From/IntoFfi for Option	2025-06-25 21:24:24 +10:00
luaneko	530a1530ba	Call it library not module	2025-06-25 20:13:09 +10:00
luaneko	a81271c0a8	No need to specify versions for local dependencies	2025-06-25 20:09:01 +10:00
luaneko	7ec60f0e6e	Add version command	2025-06-25 20:04:33 +10:00
luaneko	82726ebb5d	Set author and homepage for all packages	2025-06-25 19:57:58 +10:00
luaneko	86bfc7ad34	Add read and read_sync methods	2025-06-25 18:42:40 +10:00
luaneko	6cdf186b61	Add exports header to module docs	2025-06-25 18:42:29 +10:00
luaneko	98100d02fa	Implement string parameter specialisation	2025-06-25 18:42:09 +10:00
luaneko	681dd332ab	Avoid unnecessarily coping result inner value if it doesn't require ownership	2025-06-25 16:39:47 +10:00
luaneko	af3dbe60cb	Add Lua and FFI tags to documentation	2025-06-25 15:46:17 +10:00
luaneko	a07f62ecc5	Add tracing to lb	2025-06-25 15:02:53 +10:00