diff --git a/esbuild.config.mjs b/esbuild.config.mjs
new file mode 100644
index 0000000..5ceb375
--- /dev/null
+++ b/esbuild.config.mjs
@@ -0,0 +1,37 @@
+import esbuild from "esbuild";
+import process from "process";
+
+const watch = process.argv.includes("--watch");
+
+const context = await esbuild.context({
+  entryPoints: ["src/main.ts"],
+  bundle: true,
+  format: "cjs",
+  target: "es2020",
+  platform: "browser",
+  sourcemap: false,
+  outfile: "main.js",
+  external: [
+    "obsidian",
+    "electron",
+    "@codemirror/autocomplete",
+    "@codemirror/collab",
+    "@codemirror/commands",
+    "@codemirror/language",
+    "@codemirror/lint",
+    "@codemirror/search",
+    "@codemirror/state",
+    "@codemirror/view",
+    "@lezer/common",
+    "@lezer/highlight",
+    "@lezer/lr",
+  ],
+  logLevel: "info",
+});
+
+if (watch) {
+  await context.watch();
+} else {
+  await context.rebuild();
+  await context.dispose();
+}
diff --git a/manifest.json b/manifest.json
new file mode 100644
index 0000000..2a84652
--- /dev/null
+++ b/manifest.json
@@ -0,0 +1,10 @@
+{
+  "id": "codeblock-crbasic",
+  "name": "CodeBlock CRBasic",
+  "version": "1.0.0",
+  "minAppVersion": "1.12.7",
+  "description": "Syntax highlighting for CRBasic (Campbell Scientific) markdown code blocks.",
+  "author": "samutley",
+  "authorUrl": "https://github.com/utleysam",
+  "isDesktopOnly": false
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..2cb640d
--- /dev/null
+++ b/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "codeblock-crbasic",
+  "version": "1.0.0",
+  "private": true,
+  "description": "Obsidian plugin for CRBasic syntax highlighting in code blocks",
+  "scripts": {
+    "build": "node esbuild.config.mjs",
+    "dev": "node esbuild.config.mjs --watch"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "esbuild": "^0.25.0",
+    "obsidian": "latest",
+    "typescript": "^5.7.0",
+    "@codemirror/language": "^6.0.0",
+    "@codemirror/state": "^6.0.0",
+    "@codemirror/view": "^6.0.0"
+  }
+}
diff --git a/src/cm6-crbasic.ts b/src/cm6-crbasic.ts
new file mode 100644
index 0000000..1921ffd
--- /dev/null
+++ b/src/cm6-crbasic.ts
@@ -0,0 +1,90 @@
+/**
+ * CodeMirror 6 ViewPlugin for CRBasic syntax highlighting in code blocks.
+ *
+ * Obsidian uses HyperMD which has different syntax tree node names than
+ * standard CM6 markdown. Instead of depending on those names, this plugin
+ * scans the document text for ```crbasic fences and tokenizes the content.
+ */
+
+import {
+  ViewPlugin,
+  ViewUpdate,
+  Decoration,
+  DecorationSet,
+  EditorView,
+} from "@codemirror/view";
+import { RangeSetBuilder } from "@codemirror/state";
+import { tokenizeLine, cmClass, TokenType } from "./tokenizer";
+
+// ── Pre-built decoration cache ──────────────────────────────────────
+const decoCache: Record<string, Decoration> = {};
+function getDeco(type: TokenType): Decoration {
+  const cls = cmClass(type);
+  if (!decoCache[cls]) {
+    decoCache[cls] = Decoration.mark({ class: cls });
+  }
+  return decoCache[cls];
+}
+
+// ── ViewPlugin ──────────────────────────────────────────────────────
+
+class CRBasicHighlighter {
+  decorations: DecorationSet;
+
+  constructor(view: EditorView) {
+    this.decorations = this.buildDecorations(view);
+  }
+
+  update(update: ViewUpdate) {
+    if (update.docChanged || update.viewportChanged) {
+      this.decorations = this.buildDecorations(update.view);
+    }
+  }
+
+  buildDecorations(view: EditorView): DecorationSet {
+    const builder = new RangeSetBuilder<Decoration>();
+    const doc = view.state.doc;
+
+    // Scan document lines for ```crbasic blocks
+    let inCrbasicBlock = false;
+    const contentLines: { from: number; text: string }[] = [];
+
+    for (let i = 1; i <= doc.lines; i++) {
+      const line = doc.line(i);
+      const trimmed = line.text.trim().toLowerCase();
+
+      if (!inCrbasicBlock) {
+        // Check for opening fence: ```crbasic (with optional trailing whitespace)
+        if (/^```crbasic\s*$/i.test(line.text.trim())) {
+          inCrbasicBlock = true;
+          contentLines.length = 0;
+          continue;
+        }
+      } else {
+        // Check for closing fence
+        if (/^```\s*$/.test(line.text.trim())) {
+          // Tokenize all collected content lines and add decorations
+          for (const cl of contentLines) {
+            const tokens = tokenizeLine(cl.text, cl.from);
+            for (const tok of tokens) {
+              if (tok.from < tok.to) {
+                builder.add(tok.from, tok.to, getDeco(tok.type));
+              }
+            }
+          }
+          inCrbasicBlock = false;
+          continue;
+        }
+
+        // Collect content line
+        contentLines.push({ from: line.from, text: line.text });
+      }
+    }
+
+    return builder.finish();
+  }
+}
+
+export const crbasicHighlighter = ViewPlugin.fromClass(CRBasicHighlighter, {
+  decorations: (v) => v.decorations,
+});
diff --git a/src/crbasic-tokens.ts b/src/crbasic-tokens.ts
new file mode 100644
index 0000000..bc41984
--- /dev/null
+++ b/src/crbasic-tokens.ts
@@ -0,0 +1,194 @@
+/**
+ * Shared CRBasic token lists — single source of truth for both
+ * CodeMirror 6 and highlight.js highlighters.
+ *
+ * Ported from the VSCode CRBasic extension's TextMate grammar
+ * (daiwalkr.cr-basic-ms-vscode, v2026.5.1).
+ *
+ * CRBasic is case-insensitive; all matching should use the "i" flag.
+ */
+
+// ── Keywords (keyword.control) ──────────────────────────────────────
+export const KEYWORDS = [
+  "Alias", "ArrayIndex", "BeginProg", "EndProg", "Call", "CallTable",
+  "Case", "Is", "Const", "ConstTable", "EndConstTable", "ContinueScan",
+  "Delay", "Dim", "Do", "Else", "ElseIf", "Then", "EndIf",
+  "EndSequence", "ESSInitialize", "EssVariables", "Exit", "ExitDo",
+  "ExitFor", "ExitFunction", "ExitScan", "ExitSub", "FileManage", "To",
+  "Function", "EndFunction", "If", "IfTime", "IIF", "Include",
+  "IncludeSection", "Loop", "NewFieldNames", "Optional", "Public",
+  "ReadOnly", "Scan", "NextScan", "Select", "EndSelect",
+  "SemaphoreGet", "SemaphoreRelease", "SlowSequence", "Step", "Sub",
+  "EndSub", "SubScan", "NextSubScan", "TriggerSequence", "Units",
+  "Until", "WaitDigTrig", "WaitTriggerSequence", "While", "Wend",
+  "For", "Next",
+];
+
+// ── Preprocessor directives (keyword.control.preprocessor) ──────────
+// Matched WITH the leading "#"
+export const PREPROCESSOR = [
+  "#If", "#Else", "#ElseIf", "#EndIf", "#IfDev", "#If_no_remove", "#UnDef",
+];
+
+// ── Logical operators (keyword.operator.logical) ────────────────────
+export const LOGICAL_OPERATORS = [
+  "AND", "IMP", "INTDV", "MOD", "NOT", "OR", "XOR",
+];
+
+// ── Constants (constant.character + constant.language) ───────────────
+export const CONSTANTS = [
+  "As", "True", "False",
+  "LoggerType", "LoggerEndian", "CR_LITTLE_ENDIAN", "CR_BIG_ENDIAN",
+];
+
+// ── Built-in functions (entity.name.function.*) ─────────────────────
+// Each sub-array corresponds to one TextMate category.
+
+const CDM = [
+  "CDM_ACPower", "CDM_Battery", "CDM_BrFull", "CDM_BrFull6W",
+  "CDM_BrHalf", "CDM_BrHalf3W", "CDM_BrHalf4W", "CDM_BridgeFilt",
+  "CDM_Delay", "CDM_ExciteI", "CDM_ExciteV", "CDM_FFTFilt",
+  "CDM_MuxSelect", "CDM_PanelTemp", "CDM_PeriodAvg", "CDM_PulsePort",
+  "CDM_Resistance", "CDM_Resistance3W", "CDM_SW12", "CDM_SW5",
+  "CDM_TCComp", "CDM_TCDiff", "CDM_TCSE", "CDM_Therm107",
+  "CDM_Therm108", "CDM_Therm109", "CDM_VoltDiff", "CDM_VoltFilt",
+  "CDM_VoltSE", "CDM_VW300Config", "CDM_VW300Dynamic",
+  "CDM_VW300Rainflow", "CDM_VW300Static", "CPIAddModule",
+  "CPIFileSend", "CPISpeed", "RainFlowSample",
+];
+
+const CUSTOM_MENUS = [
+  "DisplayLine", "DisplayMenu", "EndMenu", "DisplayValue", "MenuItem",
+  "MenuPick", "MenuRecompile", "SubMenu", "EndSubMenu",
+];
+
+const DATA_TABLE = [
+  "Average", "CardFlush", "CardOut", "DataEvent",
+  "DataInterval", "DataTable", "EndTable", "DataTime", "ETsz",
+  "FFTSample", "FieldClassify", "FieldNames", "FieldOrigin",
+  "FileMark", "FillStop", "GOESAppend", "GOESField", "GoesTable",
+  "Histogram", "Histogram4D", "LevelCrossing", "Maximum", "Median",
+  "Minimum", "Moment", "OpenInterval", "ResetTable", "Sample",
+  "SampleFieldCal", "SampleMaxMin", "StdDev", "StructureType",
+  "EndStructureType", "TableFieldNames", "TableFile", "TableHide",
+  "Totalize", "WindVector", "WorstCase",
+];
+
+const DATALOGGER_STATUS = [
+  "ApplyandRestartSequence", "EndApplyandRestartSequence", "ArrayLength",
+  "CalFile", "Calibrate", "CheckPort", "ClockChange", "ClockSet",
+  "ComPortIsActive", "Data", "DataLong", "DaylightSaving",
+  "DaylightSavingUS", "Debug", "DebugBreak", "Encryption", "Erase",
+  "EthernetPower", "FieldCal", "FieldCalStrain", "GetRecord", "GPS",
+  "InstructionTimes", "LineNum", "LoadFieldCal", "MonitorComms",
+  "Move", "MuxSelect", "NewFieldCal", "NewFile", "PipeLineMode",
+  "PortBridge", "PortGet", "PortPairConfig", "PortsConfig", "PortSet",
+  "PreserveVariables", "PulsePort", "PWM", "Read", "ReadIO",
+  "RealTime", "Restart", "Restore", "SDI12SensorSetup",
+  "SDI12SensorResponse", "SecsSince1990", "SequentialMode",
+  "SetSecurity", "SetSetting", "SetStatus", "ShutDownBegin",
+  "ShutDownEnd", "Signature", "StationName", "SW12", "SWVX",
+  "TimeIntoInterval", "TimeIsBetween", "Timer", "WatchdogTimer",
+  "WriteIO",
+];
+
+const FILE_IO = [
+  "FileClose", "FileCopy", "FileEncrypt", "FileList", "FileManage",
+  "FileOpen", "FileRead", "FileReadLine", "FileRename", "FileSize",
+  "FileTime", "FileWrite", "GetFile", "GZip", "NewFile", "SendFile",
+];
+
+const INTERNET = [
+  "DHCPRenew", "EmailRecv", "EmailRelay", "EmailSend", "EthernetPower",
+  "FTPClient", "HTTPGet", "HTTPOut", "HTTPPost", "HTTPPut", "IPInfo",
+  "IPNetPower", "IPRoute", "IPTrace", "MQTTConnect", "MQTTPublish",
+  "MQTTPublishConstTable", "MQTTPublishTable", "NetworkTimeProtocol",
+  "PingIP", "PPPClose", "PPPOpen", "SMSRecv", "SMSSend",
+  "SNMPVariable", "TCPActiveConnections", "TCPClose", "TCPOpen",
+  "DNSQuery", "UDPDataGram", "UDPOpen", "UDPSocketClose",
+  "UDPSocketOpen", "UDPSocketRecv", "UDPSocketSend", "WebPageBegin",
+  "WebPageEnd", "XMLParse",
+];
+
+const MATH = [
+  "ABS", "ACOS", "AddPrecise", "AngleDegrees", "ASCII", "ASIN",
+  "ATN", "ATN2", "AvgRun", "AvgSpa", "Ceiling", "CheckSum", "COS",
+  "COSH", "Covariance", "CovSpa", "CTYPE", "DewPoint", "EXP", "FFT",
+  "FFTSpa", "FindSpa", "FIX", "Floor", "FRAC", "Hex", "HexToDec",
+  "INT", "LN", "LOG", "LOG10", "Matrix", "MaxRun", "MaxSpa",
+  "MinRun", "MinSpa", "MoveBytes", "MovePrecise", "PeakValley", "PRT",
+  "PRTCalc", "PWR", "Rainflow", "Randomize", "RectPolar", "RMSSpa",
+  "RND", "Round", "SatVP", "SGN", "SIN", "SINH", "SolarPosition",
+  "SortSpa", "SortSpaIndexed", "SQR", "StdDevRun", "StdDevSpa",
+  "StrainCalc", "TAN", "TANH", "TotalRun", "VaporPressure",
+  "WetDryBulb",
+];
+
+const MEASUREMENTS = [
+  "ACPower", "AM25T", "AVW200", "Battery", "BrFull", "BrFull6W",
+  "BrHalf", "BrHalf3W", "BrHalf4W", "CS616", "CS7500", "CSAT3",
+  "CSAT3B", "CSAT3BMonitor", "CurrentSE", "CWB100",
+  "CWB100Diagnostics", "CWB100Routes", "CWB100RSSI", "EC100",
+  "EC100Configure", "ExciteI", "ExciteV", "HydraProbe", "LI7200",
+  "LI7700", "PanelTemp", "PeriodAvg", "PulseCount", "PulseCountReset",
+  "Quadrature", "Resistance", "Resistance3W", "SDI12Recorder",
+  "TCDiff", "TCSE", "TDR100", "TDR200", "TGA", "Therm107",
+  "Therm108", "Therm109", "TimerInput", "VoltDiff", "VoltSE",
+];
+
+const PAKBUS = [
+  "AcceptDataRecords", "Broadcast", "ClockReport", "DataGram",
+  "EncryptExempt", "GetDataRecord", "GetFile", "GetVariables",
+  "NetWork", "PakBusCLock", "Route", "RouteNeighbors", "Routes",
+  "SendData", "SendFile", "SendGetVariables", "SendTableDef",
+  "SendVariables", "StaticRoute", "TimeUntilTransmit",
+];
+
+const SDM = [
+  "SDMAO4", "SDMAO4A", "SDMBeginPort", "SDMCAN", "SDMCD16AC",
+  "SDMCD16Mask", "SDMCVO4", "SDMGeneric", "SDMINT8", "SDMIO16",
+  "SDMSIO2R", "SDMSIO4", "SDMSpeed", "SDMSW8A", "SDMTrigger",
+  "SDMX50",
+];
+
+const SPECIAL_COMM = [
+  "ArgosData", "ArgosDataRepeat", "ArgosError", "ArgosSetup",
+  "ArgosTransmit", "DialModem", "DialSequence", "DialEndSequence",
+  "DNP", "DNPUpdate", "DNPVariable", "GOESData", "GOESGPS",
+  "GOESSetup", "GOESStatus", "GPS", "I2COpen", "I2CRead", "I2CWrite",
+  "ModBusClient", "ModBusServer", "ModemCallBack", "ModemHangup",
+  "EndModemHangup", "SPIOpen", "SPIRead", "SPIWrite",
+];
+
+const SERIAL_IO = [
+  "CheckSum", "ComPortIsActive", "MoveBytes", "SerialBrk",
+  "SerialClose", "SerialFlush", "SerialIn", "SerialInBlock",
+  "SerialInChk", "SerialInRecord", "SerialOpen", "SerialOut",
+  "SerialOutBlock",
+];
+
+const STRING_MANIP = [
+  "ASCII", "Base64Encode", "CHR", "FormatFloat", "FormatLong",
+  "FormatLongLong", "Hex", "HexToDec", "InStr", "Left", "Len",
+  "LowerCase", "LTrim", "Mid", "Replace", "Right", "RTrim",
+  "SplitStr", "Sprintf", "StrComp", "Trim", "TypeOf", "UpperCase",
+];
+
+// Deduplicated flat list of all built-in functions
+export const FUNCTIONS: string[] = Array.from(new Set([
+  ...CDM, ...CUSTOM_MENUS, ...DATA_TABLE, ...DATALOGGER_STATUS,
+  ...FILE_IO, ...INTERNET, ...MATH, ...MEASUREMENTS, ...PAKBUS,
+  ...SDM, ...SPECIAL_COMM, ...SERIAL_IO, ...STRING_MANIP,
+]));
+
+// ── Helpers ─────────────────────────────────────────────────────────
+
+/** Build a case-insensitive word-boundary regex from a list of words. */
+export function wordRegex(words: string[]): RegExp {
+  return new RegExp("\\b(" + words.join("|") + ")\\b", "i");
+}
+
+/** Build a Set of lower-cased words for fast O(1) lookup. */
+export function wordSet(words: string[]): Set<string> {
+  return new Set(words.map((w) => w.toLowerCase()));
+}
diff --git a/src/main.ts b/src/main.ts
new file mode 100644
index 0000000..724ec41
--- /dev/null
+++ b/src/main.ts
@@ -0,0 +1,78 @@
+/**
+ * CodeBlock CRBasic — Obsidian plugin
+ *
+ * Adds CRBasic syntax highlighting to markdown fenced code blocks
+ * in both Edit mode (CodeMirror 6 ViewPlugin) and Reading view
+ * (registerMarkdownCodeBlockProcessor).
+ */
+
+import { Plugin } from "obsidian";
+import { crbasicHighlighter } from "./cm6-crbasic";
+import { tokenizeLine, TokenType } from "./tokenizer";
+
+/** Map token types to PrismJS CSS class arrays for reading view.
+ *  PrismJS tokens need both "token" and the type class. */
+const PRISM_CLASSES: Record<TokenType, string[]> = {
+  keyword:  ["token", "keyword"],
+  builtin:  ["token", "function"],
+  operator: ["token", "operator"],
+  atom:     ["token", "boolean"],
+  number:   ["token", "number"],
+  string:   ["token", "string"],
+  comment:  ["token", "comment"],
+  meta:     ["token", "keyword"],
+};
+
+export default class CodeBlockCRBasicPlugin extends Plugin {
+  async onload() {
+    // ── Edit mode (Live Preview): CM6 ViewPlugin ────────────────
+    this.registerEditorExtension(crbasicHighlighter);
+
+    // ── Reading view: code block processor ──────────────────────
+    this.registerMarkdownCodeBlockProcessor("crbasic", (source, el) => {
+      // Match Obsidian's expected DOM structure for styled code blocks
+      const pre = el.createEl("pre", { cls: ["language-crbasic"] });
+      const code = pre.createEl("code", { cls: ["language-crbasic", "is-loaded"] });
+
+      const lines = source.split("\n");
+      for (let li = 0; li < lines.length; li++) {
+        const lineText = lines[li];
+        const tokens = tokenizeLine(lineText, 0);
+
+        if (tokens.length === 0) {
+          // No tokens — plain text line
+          code.appendText(lineText);
+        } else {
+          // Build the line with highlighted spans
+          let cursor = 0;
+          for (const tok of tokens) {
+            // Text before this token
+            if (tok.from > cursor) {
+              code.appendText(lineText.slice(cursor, tok.from));
+            }
+            // Token span with PrismJS-compatible classes
+            code.createEl("span", {
+              cls: PRISM_CLASSES[tok.type],
+              text: lineText.slice(tok.from, tok.to),
+            });
+            cursor = tok.to;
+          }
+          // Remaining text after last token
+          if (cursor < lineText.length) {
+            code.appendText(lineText.slice(cursor));
+          }
+        }
+
+        // Add newline between lines (not after the last line)
+        if (li < lines.length - 1) {
+          code.appendText("\n");
+        }
+      }
+    });
+  }
+
+  onunload() {
+    // CM6 extensions and markdown processors are automatically
+    // cleaned up by Obsidian's plugin lifecycle.
+  }
+}
diff --git a/src/tokenizer.ts b/src/tokenizer.ts
new file mode 100644
index 0000000..e85de53
--- /dev/null
+++ b/src/tokenizer.ts
@@ -0,0 +1,136 @@
+/**
+ * Standalone CRBasic tokenizer — shared by both CM6 and Reading View.
+ * Returns token ranges with CSS class names for decoration.
+ */
+
+import {
+  KEYWORDS,
+  LOGICAL_OPERATORS,
+  CONSTANTS,
+  FUNCTIONS,
+  PREPROCESSOR,
+  wordSet,
+} from "./crbasic-tokens";
+
+// ── Lookup sets (lower-cased) ───────────────────────────────────────
+const kwSet = wordSet(KEYWORDS);
+const opsSet = wordSet(LOGICAL_OPERATORS);
+const constsSet = wordSet(CONSTANTS);
+const fnsSet = wordSet(FUNCTIONS);
+const preprocSet = new Set(PREPROCESSOR.map((p) => p.toLowerCase()));
+
+// ── Token types → CSS class mapping ────────────────────────────────
+export type TokenType =
+  | "keyword"
+  | "builtin"
+  | "operator"
+  | "atom"
+  | "number"
+  | "string"
+  | "comment"
+  | "meta";
+
+export interface Token {
+  from: number;
+  to: number;
+  type: TokenType;
+}
+
+/**
+ * Tokenize a single line of CRBasic source.
+ * `offset` is the absolute position of the line start (for CM6 decorations).
+ */
+export function tokenizeLine(line: string, offset: number): Token[] {
+  const tokens: Token[] = [];
+  let i = 0;
+  const len = line.length;
+
+  while (i < len) {
+    // Skip whitespace
+    if (/\s/.test(line[i])) {
+      i++;
+      continue;
+    }
+
+    // Comment: ' to end of line
+    if (line[i] === "'") {
+      tokens.push({ from: offset + i, to: offset + len, type: "comment" });
+      break;
+    }
+
+    // String: "..."
+    if (line[i] === '"') {
+      const start = i;
+      i++;
+      while (i < len && line[i] !== '"') i++;
+      if (i < len) i++; // consume closing quote
+      tokens.push({ from: offset + start, to: offset + i, type: "string" });
+      continue;
+    }
+
+    // Preprocessor: #word
+    if (line[i] === "#") {
+      const m = line.slice(i).match(/^#\w+/i);
+      if (m && preprocSet.has(m[0].toLowerCase())) {
+        tokens.push({ from: offset + i, to: offset + i + m[0].length, type: "meta" });
+        i += m[0].length;
+        continue;
+      }
+      i++;
+      continue;
+    }
+
+    // Numbers
+    if (/\d/.test(line[i])) {
+      const m = line.slice(i).match(/^\d+(\.\d+)?/);
+      if (m) {
+        tokens.push({ from: offset + i, to: offset + i + m[0].length, type: "number" });
+        i += m[0].length;
+        continue;
+      }
+    }
+
+    // Multi-char operators
+    const opMatch = line.slice(i).match(/^(<>|>>|<<|>=|<=|\*=|\+=|-=|\/=|\\=|\^=|&=)/);
+    if (opMatch) {
+      tokens.push({ from: offset + i, to: offset + i + opMatch[0].length, type: "operator" });
+      i += opMatch[0].length;
+      continue;
+    }
+
+    // Single-char operators
+    if (/[+\-*/\\^<>=&@!]/.test(line[i])) {
+      tokens.push({ from: offset + i, to: offset + i + 1, type: "operator" });
+      i++;
+      continue;
+    }
+
+    // Identifiers / keywords / functions
+    if (/[A-Za-z_]/.test(line[i])) {
+      const m = line.slice(i).match(/^[A-Za-z_]\w*/);
+      if (m) {
+        const word = m[0].toLowerCase();
+        let type: TokenType | null = null;
+        if (kwSet.has(word)) type = "keyword";
+        else if (opsSet.has(word)) type = "operator";
+        else if (constsSet.has(word)) type = "atom";
+        else if (fnsSet.has(word)) type = "builtin";
+        if (type) {
+          tokens.push({ from: offset + i, to: offset + i + m[0].length, type });
+        }
+        i += m[0].length;
+        continue;
+      }
+    }
+
+    // Anything else — skip
+    i++;
+  }
+
+  return tokens;
+}
+
+/** CSS class for CM6 decorations */
+export function cmClass(type: TokenType): string {
+  return `cm-${type}`;
+}
diff --git a/styles.css b/styles.css
new file mode 100644
index 0000000..591a169
--- /dev/null
+++ b/styles.css
@@ -0,0 +1 @@
+/* CodeBlock CRBasic — no custom styles needed; uses Obsidian's theme tokens. */
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..0361069
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "lib": ["ES2020", "DOM"],
+    "outDir": "./dist",
+    "sourceMap": false,
+    "baseUrl": ".",
+    "types": ["node"]
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules"]
+}