Function cbm_codex_config_dir

src/cli/cli.c:2207–2219

Resolve Codex's user configuration directory. * Honors $CODEX_HOME; falls back to "$home_dir/.codex". */

/* Resolve Codex's user configuration directory.
 * Honors $CODEX_HOME; falls back to "$home_dir/.codex". */
static void cbm_codex_config_dir(const char *home_dir, char *out, size_t out_sz) {
    if (out_sz == 0) {
        return;
    }
    out[0] = '\0';
    char env_buf[CLI_BUF_1K];
    const char *env = cbm_safe_getenv("CODEX_HOME", env_buf, sizeof(env_buf), NULL);
    if (env && env[0]) {
        snprintf(out, out_sz, "%s", env);
    } else if (home_dir && home_dir[0]) {
        snprintf(out, out_sz, "%s/.codex", home_dir);
    }
}

/* Resolve Zed's user configuration directory using its documented platform
 * locations. Linux honors XDG_CONFIG_HOME before ~/.config. */