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>
2026-09-07 22:42:32 +08:00
commit 1f1fcba7ad
75 changed files with 14940 additions and 0 deletions
@@ -0,0 +1,64 @@
+#ifndef SASHIDOWN_H
+#define SASHIDOWN_H
+
+#include <stddef.h>
+
+#define SASHIDOWN_OUTPUT_DEFAULT 65536
+
+typedef struct {
+    const char *input;
+    size_t       input_len;
+    char        *output;
+    size_t       output_cap;
+    size_t       output_len;
+    char        *write_ptr;
+    char        *write_end;
+    void        *line_ix;
+    int          overflow; /* set when output buffer is exhausted */
+} sashidown_ctx_t;
+
+/* Parse markdown to HTML. Returns 0 on success, -1 on error
+ * (null args, or output buffer too small — never silently truncates). */
+int sashidown_parse(const char *input, size_t len,
+                 char *output, size_t cap, size_t *out_len);
+
+typedef enum {
+    SASHIDOWN_FMT_HTML = 0,
+    SASHIDOWN_FMT_ANSI = 1,       /* built-in colorful terminal theme */
+    SASHIDOWN_FMT_JSON = 2,
+    SASHIDOWN_FMT_ANSI_PLAIN = 3, /* monochrome / SGR attributes only */
+} sashidown_format_t;
+
+/* Single-pass convert. SASHIDOWN_FMT_HTML delegates to sashidown_parse.
+ * Returns 0 on success, -1 on error (null args, bad format, or buffer too small). */
+int sashidown_convert(const char *input, size_t len,
+                   char *output, size_t cap, size_t *out_len,
+                   sashidown_format_t format);
+
+/* Allocating wrapper (thread-safe). Caller must free via sashidown_free. */
+char *cmark_markdown_to_html(const char *text, int len);
+void  sashidown_free(void *ptr);
+
+/* --- Streaming API (AI conversation / incremental input) --- */
+
+typedef struct sashidown_stream sashidown_stream_t;
+
+/* Called for each HTML chunk; return non-zero to abort feeding. */
+typedef int (*sashidown_stream_cb)(const char *html, size_t len, void *user);
+
+typedef struct {
+    sashidown_stream_cb on_html;
+    void            *user;
+    size_t           output_buf_size; /* default 8192 if 0; grows on overflow */
+} sashidown_stream_opts_t;
+
+sashidown_stream_t *sashidown_stream_create(const sashidown_stream_opts_t *opts);
+int sashidown_stream_feed(sashidown_stream_t *s, const char *chunk, size_t len);
+int sashidown_stream_finish(sashidown_stream_t *s);
+void sashidown_stream_destroy(sashidown_stream_t *s);
+
+/* Bytes held past the confirmation frontier (input_len - render_pos).
+ * Unconfirmed suffix under uncertain future input; O(1) query. */
+size_t sashidown_stream_pending(const sashidown_stream_t *s);
+
+#endif /* SASHIDOWN_H */