Selfhost: EXE path switched to Program(JSON v0) → MIR(JSON) → ny-llvmc; BuildBox opts (structured via env/array) and Bridge v1 positive canary

- selfhost_build.sh: EXE now converts Stage‑B Program(JSON v0) to MIR(JSON) via --json-file + --program-json-to-mir, then feeds ny-llvmc
- BuildBox: accept minimal opts via env or simple array parsing (alias_table, require_mods)
- Add positive v1 bridge canary: canonicalize_method_size_on_array_vm.sh (quick)

src/cli/args.rs

@@ -42,6 +42,7 @@ pub fn build_command() -> Command {
         .arg(Arg::new("ny-parser-pipe").long("ny-parser-pipe").help("Read Ny JSON IR v0 from stdin and execute via MIR Interpreter").action(clap::ArgAction::SetTrue))
         .arg(Arg::new("json-file").long("json-file").value_name("FILE").help("Read Ny JSON IR v0 from a file and execute via MIR Interpreter"))
         .arg(Arg::new("emit-mir-json").long("emit-mir-json").value_name("FILE").help("Emit MIR JSON v0 to file and exit"))
+        .arg(Arg::new("program-json-to-mir").long("program-json-to-mir").value_name("FILE").help("Convert Program(JSON v0) to MIR(JSON) and exit (use with --json-file)"))
         .arg(Arg::new("emit-exe").long("emit-exe").value_name("FILE").help("Emit native executable via ny-llvmc and exit"))
         .arg(Arg::new("emit-exe-nyrt").long("emit-exe-nyrt").value_name("DIR").help("Directory containing libnyash_kernel.a (used with --emit-exe)"))
         .arg(Arg::new("emit-exe-libs").long("emit-exe-libs").value_name("FLAGS").help("Extra linker flags for ny-llvmc when emitting executable"))
@@ -147,6 +148,7 @@ pub fn from_matches(matches: &ArgMatches) -> CliConfig {
         build_target: matches.get_one::<String>("build-target").cloned(),
         cli_usings: matches.get_many::<String>("using").map(|v| v.cloned().collect()).unwrap_or_else(|| Vec::new()),
         emit_mir_json: matches.get_one::<String>("emit-mir-json").cloned(),
+        program_json_to_mir: matches.get_one::<String>("program-json-to-mir").cloned(),
         emit_exe: matches.get_one::<String>("emit-exe").cloned(),
         emit_exe_nyrt: matches.get_one::<String>("emit-exe-nyrt").cloned(),
         emit_exe_libs: matches.get_one::<String>("emit-exe-libs").cloned(),

src/cli/groups.rs

@@ -57,6 +57,7 @@ pub struct BuildConfig {
 pub struct EmitConfig {
     pub emit_cfg: Option<String>,
     pub emit_mir_json: Option<String>,
+    pub program_json_to_mir: Option<String>,
     pub emit_exe: Option<String>,
     pub emit_exe_nyrt: Option<String>,
     pub emit_exe_libs: Option<String>,
@@ -86,4 +87,3 @@ pub struct CliGroups {
     pub run_task: Option<String>,
     pub load_ny_plugins: bool,
 }
-

src/cli/mod.rs

@@ -59,6 +59,7 @@ pub struct CliConfig {
     pub build_target: Option<String>,
     pub cli_usings: Vec<String>,
     pub emit_mir_json: Option<String>,
+    pub program_json_to_mir: Option<String>,
     pub emit_exe: Option<String>,
     pub emit_exe_nyrt: Option<String>,
     pub emit_exe_libs: Option<String>,
@@ -118,6 +119,7 @@ impl CliConfig {
             emit: EmitConfig {
                 emit_cfg: self.emit_cfg.clone(),
                 emit_mir_json: self.emit_mir_json.clone(),
+                program_json_to_mir: self.program_json_to_mir.clone(),
                 emit_exe: self.emit_exe.clone(),
                 emit_exe_nyrt: self.emit_exe_nyrt.clone(),
                 emit_exe_libs: self.emit_exe_libs.clone(),
@@ -190,6 +192,7 @@ impl Default for CliConfig {
             build_target: None,
             cli_usings: Vec::new(),
             emit_mir_json: None,
+            program_json_to_mir: None,
             emit_exe: None,
             emit_exe_nyrt: None,
             emit_exe_libs: None,