diff --git a/Makefile b/Makefile
index ea9f3bc..3ef909f 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,7 @@ SRCS=                       \
 	libraries/cJSON/cJSON.c \
 	src/json_rpc.c          \
 	src/main.c              \
-	src/pawn_lsp.c
+	src/pawn_ls.c
 
 OBJS=$(addprefix $(BUILD_DIR)/,$(addsuffix .o,$(basename $(SRCS))))
 DEPS=$(addprefix $(BUILD_DIR)/,$(addsuffix .d,$(basename $(SRCS))))
diff --git a/README.md b/README.md
index 25ec240..87d54ad 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
 # Pawn Language Server
 
-`pawn_lsp` is a project to provide basic LSP functionality for the
+`pawn_ls` is a project to provide basic language server functionality for the
 [Pawn scripting language](https://codeberg.org/compuphase/pawn).
 
-`pawn_lsp` is currently in development and has no releases, refer to the
+`pawn_ls` is currently in development and has no releases, refer to the
 repository work items for development status.
 
diff --git a/src/main.c b/src/main.c
index d817f3b..335e76e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,12 +6,12 @@
 
 #include "log.h"
 #include "json_rpc.h"
-#include "pawn_lsp.h"
+#include "pawn_ls.h"
 
 void sighandler(int signal);
 
 static json_rpc_t jrpc;
-static pawn_lsp_t pawn;
+static pawn_ls_t pawn;
 
 FILE *logger = NULL;
 
@@ -22,11 +22,11 @@ main(int argc, char **argv)
     struct termios term_new;
 
     if (argc < 2) {
-        fprintf(stderr, "Usage: pawn_lsp <pawncc> [...pawncc options]\r\n");
+        fprintf(stderr, "Usage: pawn_ls <pawncc> [...pawncc options]\r\n");
         return (-1);
     }
 
-    logger = fopen("pawn_lsp.log", "w");
+    logger = fopen("pawn_ls.log", "w");
 
     if (signal(SIGINT, sighandler) == SIG_ERR) {
         log_error("Failed to intialize signal handling\r\n");
@@ -45,13 +45,13 @@ main(int argc, char **argv)
         return (-1);
     }
 
-    if (pawn_lsp_init(&pawn, &jrpc, argv[1], &argv[2], argc - 2)) {
+    if (pawn_ls_init(&pawn, &jrpc, argv[1], &argv[2], argc - 2)) {
         log_error("Failed to register Pawn language server\r\n");
         return (-1);
     }
 
     json_rpc_run(&jrpc);
-    pawn_lsp_deinit(&pawn);
+    pawn_ls_deinit(&pawn);
 
     if (logger) {
         fclose(logger);
diff --git a/src/pawn_engine.c b/src/pawn_engine.c
new file mode 100644
index 0000000..e69de29
diff --git a/src/pawn_engine.h b/src/pawn_engine.h
new file mode 100644
index 0000000..8a48cdb
--- /dev/null
+++ b/src/pawn_engine.h
@@ -0,0 +1,59 @@
+#ifndef _PAWN_ENGINE_H_
+#define _PAWN_ENGINE_H_
+
+#include <stddef.h>
+
+typedef struct str_struct {
+    /** Actual value of the string */
+    char *val;
+    /** Current length of the string in bytes */
+    size_t len;
+    /** Capacity of the string buffer */
+    size_t cap;
+} str_t;
+
+typedef struct file_position_struct {
+    /** Line number in the file (1-indexed) */
+    size_t line;
+    /** Column number in the file (1-indexed) */
+    size_t column;
+} file_position_t;
+
+typedef struct file_range_struct {
+    /** Start of the range, inclusive */
+    file_position_t start;
+    /** End of the range, inclusive */
+    file_position_t end;
+} file_range_t;
+
+typedef struct file_diagnostic_struct {
+    /** Message for the diagnostic */
+    str_t message;
+    /** Range of text the diagnostic applies to */
+    file_range_t range;
+} file_diagnostic_t;
+
+typedef struct pawn_diagnostics_struct {
+    /** Errors present in a Pawn script */
+    file_diagnostic_t *errors;
+    /** Number of errors */
+    size_t errors_len;
+    /** Warnings present in a Pawn script */
+    file_diagnostic_t *warnings;
+    /** Number of warnings */
+    size_t warnings_len;
+} pawn_diagnostics_t;
+
+typedef struct pawn_engine_settings_struct {
+    /** Path to the pawncc executable */
+    const char *pawncc;
+    /** Extra options to run pawncc with, not including the pawncc or script paths */
+    const char **argv;
+    /** Number of extra options */
+    int argc;
+} pawn_engine_settings_t;
+
+pawn_diagnostics_t *pawn_engine_compile(const char *path, pawn_engine_settings_t *settings);
+
+#endif /* _PAWN_ENGINE_H_ */
+
diff --git a/src/pawn_lsp.c b/src/pawn_ls.c
similarity index 56%
rename from src/pawn_lsp.c
rename to src/pawn_ls.c
index 1739a6f..86ef960 100644
--- a/src/pawn_lsp.c
+++ b/src/pawn_ls.c
@@ -4,10 +4,10 @@
 #include "cJSON/cJSON.h"
 #include "json_rpc.h"
 #include "log.h"
-#include "pawn_lsp.h"
+#include "pawn_ls.h"
 
-#define PAWN_LSP_VESRION "v0.0.1"
-#define PAWN_LSP_NAME "pawn_lsp"
+#define PAWN_LS_VESRION "v0.0.1"
+#define PAWN_LS_NAME "pawn_ls"
 
 
 static int _request_handler(json_rpc_request_t *req, cJSON **resp, void *arg);
@@ -16,10 +16,11 @@ static void _notify_handler(json_rpc_request_t *req, void *arg);
 static int _initialize(json_rpc_request_t *req, cJSON **resp, void *arg);
 static int _shutdown(json_rpc_request_t *req, cJSON **resp, void *arg);
 
+static void _didopen_notf(json_rpc_request_t *req, void *arg);
 static void _exit_notf(json_rpc_request_t *req, void *arg);
 
 int
-pawn_lsp_init(pawn_lsp_t *pawn,
+pawn_ls_init(pawn_ls_t *pawn,
               json_rpc_t *jrpc,
               const char *pawncc,
               char **pawn_args,
@@ -45,7 +46,7 @@ pawn_lsp_init(pawn_lsp_t *pawn,
 }
 
 void
-pawn_lsp_deinit(pawn_lsp_t *pawn)
+pawn_ls_deinit(pawn_ls_t *pawn)
 {
     free(pawn->pawncc);
     for (int i = 0; pawn->pawn_args[i] != NULL; i++) {
@@ -79,7 +80,9 @@ _notify_handler(json_rpc_request_t *req, void *arg)
 
     log_info("Handle notification \"%s\"\r\n", method);
 
-    if (!strcmp(method, "exit")) {
+    if (!strcmp(method, "textDocument/didOpen")) {
+        _didopen_notf(req, arg);
+    } else if (!strcmp(method, "exit")) {
         _exit_notf(req, arg);
     } else {
         log_warn("Unrecognized notification method\r\n");
@@ -90,26 +93,54 @@ _notify_handler(json_rpc_request_t *req, void *arg)
 int
 _initialize(json_rpc_request_t *req, cJSON **resp, void *arg)
 {
+    cJSON *capabilities;
     cJSON *val;
 
     (*resp) = cJSON_CreateObject();
 
-    val = cJSON_AddObjectToObject((*resp), "capabilities");
-    if (val == NULL) {
-        return (-1);
-    }
-
-    if (cJSON_AddStringToObject(val, "positionEncoding", "utf-8") == NULL) {
-        return (-1);
-    }
 
     val = cJSON_AddObjectToObject((*resp), "serverInfo");
     if (val == NULL) {
         return (-1);
     }
 
-    if ((cJSON_AddStringToObject(val, "name", PAWN_LSP_NAME) == NULL) ||
-        (cJSON_AddStringToObject(val, "version", PAWN_LSP_VESRION) == NULL)) {
+    if ((cJSON_AddStringToObject(val, "name", PAWN_LS_NAME) == NULL) ||
+        (cJSON_AddStringToObject(val, "version", PAWN_LS_VESRION) == NULL)) {
+        return (-1);
+    }
+
+
+    /* All capabilities */
+    capabilities = cJSON_AddObjectToObject((*resp), "capabilities");
+    if (capabilities == NULL) {
+        return (-1);
+    }
+
+    /* utf-8 encoding only */
+    if (cJSON_AddStringToObject(capabilities, "positionEncoding", "utf-8") == NULL) {
+        return (-1);
+    }
+
+    /* TextDocumentSync */
+    val = cJSON_AddObjectToObject(capabilities, "textDocumentSync");
+    if (val == NULL) {
+        return (-1);
+    }
+
+    if ((cJSON_AddTrueToObject(val, "openClose") == NULL) ||
+        /* 1 = full content */
+        (cJSON_AddNumberToObject(val, "change", 1) == NULL)) {
+        return (-1);
+    }
+
+    /* Hover */
+    if (cJSON_AddTrueToObject(capabilities, "hoverProvider") == NULL) {
+        return (-1);
+    }
+
+    /* Go to's */
+    if ((cJSON_AddTrueToObject(capabilities, "declarationProvider") == NULL) ||
+        (cJSON_AddTrueToObject(capabilities, "definitionProvider") == NULL)) {
         return (-1);
     }
 
@@ -123,10 +154,35 @@ _shutdown(json_rpc_request_t *req, cJSON **resp, void *arg)
     return (0);
 }
 
+static void
+_didopen_notf(json_rpc_request_t *req, void *arg) {
+    cJSON *textdoc = cJSON_GetObjectItem(req->params, "textDocument");
+    cJSON *val;
+
+    if ((textdoc == NULL) || (!cJSON_IsObject(textdoc))) {
+        log_error("Invalid textDocument field\r\n");
+        return;
+    }
+
+    val = cJSON_GetObjectItem(textdoc, "uri");
+    if (val && cJSON_IsString(val)) {
+        log_info("textdoc uri: %s\r\n", val->valuestring);
+    } else {
+        log_warn("Invalid uri\r\n");
+    }
+
+    val = cJSON_GetObjectItem(textdoc, "text");
+    if (val && cJSON_IsString(val)) {
+        log_info("textdoc text: \"%s\"\r\n", val->valuestring);
+    } else {
+        log_warn("Invalid text\r\n");
+    }
+}
+
 static void
 _exit_notf(json_rpc_request_t *req, void *arg)
 {
-    pawn_lsp_t *pawn = arg;
+    pawn_ls_t *pawn = arg;
     json_rpc_cancel(pawn->jrpc);
 }
 
diff --git a/src/pawn_lsp.h b/src/pawn_ls.h
similarity index 68%
rename from src/pawn_lsp.h
rename to src/pawn_ls.h
index e833a38..4285432 100644
--- a/src/pawn_lsp.h
+++ b/src/pawn_ls.h
@@ -1,27 +1,27 @@
-#ifndef _PAWN_LSP_H_
-#define _PAWN_LSP_H_
+#ifndef _PAWN_LS_H_
+#define _PAWN_LS_H_
 
 #include "json_rpc.h"
 
-typedef struct pawn_lsp_struct {
+typedef struct pawn_ls_struct {
     /** Active JRPC instance */
     json_rpc_t *jrpc;
     /** Path to the pawncc compiler */
     char *pawncc;
     /** User provided args for pawncc */
     char **pawn_args;
-} pawn_lsp_t;
+} pawn_ls_t;
 
 /**
  * @brief Register JSON RPC methods for the Pawn language server
  */
-int pawn_lsp_init(pawn_lsp_t *pawn,
+int pawn_ls_init(pawn_ls_t *pawn,
                   json_rpc_t *jrpc,
                   const char *pawncc,
                   char **pawn_argv,
                   int pawn_argc);
 
-void pawn_lsp_deinit(pawn_lsp_t *pawn);
+void pawn_ls_deinit(pawn_ls_t *pawn);
 
-#endif /* _PAWN_LSP_H_ */
+#endif /* _PAWN_LS_H_ */