diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..bee2cda
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,17 @@
+.PHONY: all build
+
+all: test build
+
+test:
+	deno test --unstable --allow-read utils/test.js
+
+link-check:
+	lychee spec/**/*.yaml
+
+format:
+	deno fmt utils/*.js README.md
+
+fmt: format
+
+build:
+	deno run --unstable --allow-read --allow-write utils/exec.js build
\ No newline at end of file
diff --git a/README.md b/README.md
index c6ade85..2b366a4 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
- # Prague Blockchain Week (PBW) 
+# Prague Blockchain Week (PBW)
 
- A decentralized conference hosted by [UTXO Foundation](https://utxo.foundation/). We are using this GitHub repository to coordinate event listings.
+A decentralized conference hosted by
+[UTXO Foundation](https://utxo.foundation/). We are using this GitHub repository
+to coordinate event listings.
 
 https://prgblockweek.com
 
diff --git a/data/23/events/ethprague.toml b/data/23/events/ethprague/index.toml
similarity index 100%
rename from data/23/events/ethprague.toml
rename to data/23/events/ethprague/index.toml
diff --git a/data/23/events/utxo/index.toml b/data/23/events/utxo/index.toml
new file mode 100644
index 0000000..b277901
--- /dev/null
+++ b/data/23/events/utxo/index.toml
@@ -0,0 +1 @@
+name = "UTXO.23"
\ No newline at end of file
diff --git a/data/23/index.toml b/data/23/index.toml
new file mode 100644
index 0000000..80f54bd
--- /dev/null
+++ b/data/23/index.toml
@@ -0,0 +1 @@
+name = "Prague Blockchain Week 2023"
\ No newline at end of file
diff --git a/utils/engine.js b/utils/engine.js
new file mode 100644
index 0000000..425cf5a
--- /dev/null
+++ b/utils/engine.js
@@ -0,0 +1,40 @@
+import { parse as tomlParse } from "https://deno.land/std@0.173.0/encoding/toml.ts";
+
+export class DeConfEngine {
+  constructor(options = {}) {
+    this.options = options;
+    this.srcDir = this.options.srcDir || "./data";
+  }
+  async init() {}
+  async build() {
+    this.entries = {};
+    for await (const f of Deno.readDir(this.srcDir)) {
+      if (!f.name.match(/^\d+$/)) {
+        continue;
+      }
+      const specDir = [this.srcDir, f.name].join("/");
+
+      const entry = this.entries[f.name] = {};
+      // load year index
+      entry.index = await this._tomlLoad([specDir, "index.toml"].join("/"));
+      console.log(`\n##\n## [${entry.index.name}] \n##`);
+      // load sub-events
+      entry.events = [];
+      for await (const ef of Deno.readDir([specDir, "events"].join("/"))) {
+        if (!ef.name.match(/^[\w\d\-]+$/)) {
+          continue;
+        }
+        const efDir = [specDir, "events", ef.name].join("/");
+        const efIndex = await this._tomlLoad([efDir, "index.toml"].join("/"));
+        const event = {
+          index: efIndex,
+        };
+        entry.events.push(event);
+      }
+      console.table(entry.events.map((e) => e.index), ["name"]);
+    }
+  }
+  async _tomlLoad(fn) {
+    return tomlParse(await Deno.readTextFile(fn));
+  }
+}
diff --git a/utils/exec.js b/utils/exec.js
new file mode 100644
index 0000000..26c8fdb
--- /dev/null
+++ b/utils/exec.js
@@ -0,0 +1,12 @@
+import { DeConfEngine } from "./engine.js";
+
+const deconf = new DeConfEngine();
+await deconf.init();
+
+let cmd = Deno.args[0] || "build";
+let args = Deno.args.slice(1) || [];
+
+const output = await deconf[cmd](...args);
+if (output) {
+  console.log(output);
+}
diff --git a/utils/test.js b/utils/test.js
new file mode 100644
index 0000000..e69de29