Command Pattern
Encapsulate a request as an object, allowing parameterization, queuing, and undo. In C, a struct containing function pointer plus arguments.
ikigai Application
Slash commands: Each command (/clear, /mark, /rewind) is a discrete operation:
typedef struct {
const char *name;
res_t (*execute)(ik_repl_ctx_t *repl, const char *args);
const char *help;
} ik_command_t;
Input actions: Parser emits action structs that REPL executes.
Future uses:
- Undo/redo stack for input editing
- Queued tool executions
- Macro recording and playback
Benefit: Commands become first-class, can be logged, serialized, or replayed.