Function codex_hook_strip

src/cli/cli.c:1599–1627

Splice out an existing [CODEX_HOOK_BEGIN .. CODEX_HOOK_END] block (inclusive, * plus a leading newline). Returns a newly-malloc'd string the caller frees, or * NULL if no block was present (content is left untouched). */

 * plus a leading newline). Returns a newly-malloc'd string the caller frees, or
 * NULL if no block was present (content is left untouched). */
static char *codex_hook_strip(const char *content) {
    const char *begin = strstr(content, CODEX_HOOK_BEGIN);
    if (!begin) {
        return NULL;
    }
    const char *end = strstr(begin, CODEX_HOOK_END);
    if (!end) {
        return NULL;
    }
    end += strlen(CODEX_HOOK_END);
    if (*end == '\n') {
        end++;
    }
    /* Drop one leading newline before the block, if any. */
    const char *cut = begin;
    if (cut > content && *(cut - CLI_SKIP_ONE) == '\n') {
        cut--;
    }
    size_t prefix_len = (size_t)(cut - content);
    size_t suffix_len = strlen(end);
    char *out = malloc(prefix_len + suffix_len + CLI_SKIP_ONE);
    if (!out) {
        return NULL;
    }
    memcpy(out, content, prefix_len);
    memcpy(out + prefix_len, end, suffix_len);
    out[prefix_len + suffix_len] = '\0';
    return out;
}

/* Install/update the Codex SessionStart reminder hook in config.toml. */
int cbm_upsert_codex_hooks(const char *config_path) {