fix: decode child exit status for LASTEXIT

docs/CURRENT_STATUS.md

@@ -27,7 +27,7 @@ Verified in this checkout on 2026-09-22:
 - `./claro doctor`: all checks `OK`.
 - `./claro validate`: validation passed.
 
-This slice does not yet fix memory cleanup, `LASTEXIT`, HTTP buffering/status handling, or other review findings. Claro remains a trusted-script interpreter, not a sandbox.
+The `RUN COMMAND` path now decodes POSIX `pclose()` wait status before storing `LASTEXIT`, so a child that exits with code 3 exposes `3` rather than the encoded status `768`. Focused coverage is `tests/42_last_exit_code.claro`. This slice does not yet fix memory cleanup, HTTP buffering/status handling, or other review findings. Claro remains a trusted-script interpreter, not a sandbox.
 
 ## Feature matrix
 

src/claro.c

@@ -32,6 +32,7 @@ int pclose(FILE *stream);
 #ifndef _WIN32
 #include <dirent.h>
 #include <unistd.h>
+#include <sys/wait.h>
 #else
 #include <direct.h>
 #include <io.h>
@@ -205,7 +206,7 @@ static char *capture_command_output(const char *cmd,int *exit_code){
 #ifdef _WIN32
  if(exit_code) *exit_code=_pclose(fp);
 #else
- if(exit_code) *exit_code=pclose(fp);
+ if(exit_code){ int status=pclose(fp); if(WIFEXITED(status)) *exit_code=WEXITSTATUS(status); else if(WIFSIGNALED(status)) *exit_code=128+WTERMSIG(status); else *exit_code=-1; }
 #endif
  return str_take(&out);
 }

tests/42_last_exit_code.claro

@@ -0,0 +1,2 @@
+RUN COMMAND "exit 3" AS output
+SAY LASTEXIT

tests/42_last_exit_code.out

@@ -0,0 +1 @@
+3