Initial CST-Agent: portable Linux/Termux/Windows coding agent.

Vendored sashidown, OpenAI-compatible env (OPENAI_*), and bootstrap scripts.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/models.c

@@ -0,0 +1,67 @@
+#include "cst_agent.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MODEL_MAX_LEN 128
+
+static int already(char out[][MODEL_MAX_LEN], int n, const char *name) {
+  for (int i = 0; i < n; i++) {
+    if (strcmp(out[i], name) == 0)
+      return 1;
+  }
+  return 0;
+}
+
+static int push(char out[][MODEL_MAX_LEN], int *n, int max, const char *name) {
+  if (!name || !name[0] || *n >= max)
+    return 0;
+  if (already(out, *n, name))
+    return 0;
+  snprintf(out[*n], MODEL_MAX_LEN, "%s", name);
+  (*n)++;
+  return 1;
+}
+
+int cst_models_list(const char *current, char out[][128], int max_out) {
+  if (!out || max_out <= 0)
+    return 0;
+  int n = 0;
+
+  const char *env = getenv("CST_MODELS");
+  if (env && env[0]) {
+    char buf[1024];
+    snprintf(buf, sizeof(buf), "%s", env);
+    char *p = buf;
+    while (*p && n < max_out) {
+      while (*p == ':' || *p == ' ' || *p == ',')
+        p++;
+      if (!*p)
+        break;
+      char *start = p;
+      while (*p && *p != ':' && *p != ',')
+        p++;
+      char save = *p;
+      *p = 0;
+      /* trim trailing spaces */
+      char *end = start + strlen(start);
+      while (end > start && (end[-1] == ' ' || end[-1] == '\t'))
+        *--end = 0;
+      push(out, &n, max_out, start);
+      *p = save;
+      if (*p)
+        p++;
+    }
+  } else {
+    push(out, &n, max_out, "MiniMax-M2.7");
+    push(out, &n, max_out, "MiniMax-M2.5");
+    push(out, &n, max_out, "gpt-4o");
+    push(out, &n, max_out, "gpt-4o-mini");
+  }
+
+  if (current && current[0])
+    push(out, &n, max_out, current);
+
+  return n;
+}