Improve native callbacks, value narrowing, and runtime metadata

docs/content/docs/cli.mdx

@@ -54,7 +54,7 @@ fib.s
 
 Different output kinds accumulate in `.scriptc/`; rebuilding a kind updates its file.
 
-The IR and LLVM source outputs require only Node. On supported macOS, Linux, and Windows hosts, assembly and object outputs use the matching native helper installed with scriptc and do not invoke an external compiler, archiver, linker, or SDK. The object is a relocatable program object with undefined <code>scr_*</code> runtime symbols and a required <code>scr_runtime_abi_v7</code> marker, not a standalone library. External consumption is experimental and requires the exact runtime version reported by <code>--print=native-link-info</code>. That option still writes the object, performs no link, and prints a versioned JSON recipe with the target, <code>main</code> entry, installed precompiled runtime pack, FFI inputs, and system libraries. It never reports private scriptc cache paths. See <a href="/native-objects">Native Program Objects</a> for complete C-driver and direct-linker examples. <code>--emit=exe</code> is the default. LLVM builds emit the program object through the helper and link precompiled runtime objects; runtime development with AddressSanitizer compiles an instrumented C runtime.
+The IR and LLVM source outputs require only Node. On supported macOS, Linux, and Windows hosts, assembly and object outputs use the matching native helper installed with scriptc and do not invoke an external compiler, archiver, linker, or SDK. The object is a relocatable program object with undefined <code>scr_*</code> runtime symbols and a required <code>scr_runtime_abi_v8</code> marker, not a standalone library. External consumption is experimental and requires the exact runtime version reported by <code>--print=native-link-info</code>. That option still writes the object, performs no link, and prints a versioned JSON recipe with the target, <code>main</code> entry, installed precompiled runtime pack, FFI inputs, and system libraries. It never reports private scriptc cache paths. See <a href="/native-objects">Native Program Objects</a> for complete C-driver and direct-linker examples. <code>--emit=exe</code> is the default. LLVM builds emit the program object through the helper and link precompiled runtime objects; runtime development with AddressSanitizer compiles an instrumented C runtime.
 
 ## scriptc run
 

docs/content/docs/how-it-works.mdx

@@ -68,7 +68,7 @@ Without `-o`, artifacts are written to `.scriptc/` next to the input. Different
 
 ### External linking
 
-Program objects define `main` and leave selected `scr_*` runtime functions undefined. A strong reference to `scr_runtime_abi_v7` checks runtime compatibility at link time.
+Program objects define `main` and leave selected `scr_*` runtime functions undefined. A strong reference to `scr_runtime_abi_v8` checks runtime compatibility at link time.
 
 `--print=native-link-info` emits the program object and a JSON recipe containing the runtime pack and link order for external builds. This object ABI is experimental and requires an exact runtime version. See [Native Program Objects](/docs/native-objects) for examples.
 

docs/content/docs/native-objects.mdx

@@ -8,7 +8,7 @@ title: "Native Program Objects"
 
 The external object ABI is **experimental**. Its `scr_*` function and data surface may change before 1.0, so consumers must use the exact runtime-pack version reported by the same compiler installation. This is stricter than semver compatibility.
 
-The object intentionally leaves its selected runtime symbols undefined. It also holds a strong reference to `scr_runtime_abi_v7`, which the matching runtime defines. Linking an object against a runtime with another ABI marker fails at link time with the missing versioned symbol; it cannot become a latent runtime incompatibility.
+The object intentionally leaves its selected runtime symbols undefined. It also holds a strong reference to `scr_runtime_abi_v8`, which the matching runtime defines. Linking an object against a runtime with another ABI marker fails at link time with the missing versioned symbol; it cannot become a latent runtime incompatibility.
 
 ## Machine-readable link information
 

docs/src/generated/node-v24-compatibility-meta.json

@@ -2,6 +2,6 @@
   "schemaVersion": 3,
   "nodeVersion": "24.15.0",
   "nodeCommit": "848430679556aed0bd073f2bc263331ad84fa119",
-  "artifactVersion": "32b04265083c89d00ea3",
+  "artifactVersion": "ae934a592466ef1e67c1",
   "rowCount": 3662
 }

docs/src/generated/node-v24-compatibility.json

@@ -410,9 +410,9 @@
       "apiEntries": 461,
       "static": {
         "supported": 0,
-        "partial": 3,
+        "partial": 8,
         "refused": 0,
-        "not-implemented": 458,
+        "not-implemented": 453,
         "by-design": 0,
         "unreviewed": 0,
         "not-applicable": 0
@@ -1130,9 +1130,9 @@
       "apiEntries": 18,
       "static": {
         "supported": 0,
-        "partial": 3,
+        "partial": 7,
         "refused": 0,
-        "not-implemented": 15,
+        "not-implemented": 11,
         "by-design": 0,
         "unreviewed": 0,
         "not-applicable": 0
@@ -22256,9 +22256,9 @@
       "anchor": "class-systemerror",
       "nodeStability": null,
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented for the documented scriptc module-loader subset.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -22279,9 +22279,9 @@
       "anchor": "class-systemerror",
       "nodeStability": null,
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented for the documented scriptc module-loader subset.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -22302,9 +22302,9 @@
       "anchor": "class-systemerror",
       "nodeStability": null,
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented for the documented scriptc module-loader subset.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -22371,9 +22371,9 @@
       "anchor": "class-systemerror",
       "nodeStability": null,
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented for the documented scriptc module-loader subset.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -22417,9 +22417,9 @@
       "anchor": "class-systemerror",
       "nodeStability": null,
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented for the documented scriptc module-loader subset.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -80894,9 +80894,9 @@
         "inherited": true
       },
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented by a dedicated static compiler/runtime path.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -81062,9 +81062,9 @@
         "inherited": true
       },
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented by a dedicated static compiler/runtime path.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -81174,9 +81174,9 @@
         "inherited": true
       },
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented by a dedicated static compiler/runtime path.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "not-implemented",
@@ -81258,9 +81258,9 @@
         "inherited": true
       },
       "static": {
-        "status": "not-implemented",
-        "detail": "No static compiler lowering is registered for this API yet.",
-        "verification": "registry-gap"
+        "status": "partial",
+        "detail": "Implemented by a dedicated static compiler/runtime path.",
+        "verification": "test-backed"
       },
       "dynamic": {
         "status": "partial",