diff --git a/typescript-deno/README.md b/typescript-deno/README.md
index c1ee086..0675ad6 100644
--- a/typescript-deno/README.md
+++ b/typescript-deno/README.md
@@ -9,21 +9,16 @@ If using VSCode, you might want to enable the extension in the settings:
 ```jsonc
 // .vscode/settings.json
 {
-  "deno.enable": true
+  "deno.enable": true,
+  // or specifically
+  "deno.enablePaths": ["./typescript-deno"]
 }
 ```
 
 ## Usage
 
-- `./script/start` to run your code
-- `./script/start` to run the tests
-
-### Other commands
-
-- `deno run src/exerciste.ts --watch` will re-run [`mod.ts`](./src/mod.ts) on every
-  file change, for quick development feedback.
-- `deno test src --watch` will re-run [`mod.test.ts`](./src/mod.test.ts) on every file
-  change, for quick development feedback.
+- `./script/start` to run the source code
+- `./script/test` to run the tests in watch mode
 
 ## Structure
 
diff --git a/typescript-deno/deno.jsonc b/typescript-deno/deno.jsonc
new file mode 100644
index 0000000..0f5bbf5
--- /dev/null
+++ b/typescript-deno/deno.jsonc
@@ -0,0 +1,13 @@
+{
+  "tasks": {
+    "start": "./script/start",
+    "test": "./script/test"
+  },
+  // https://github.com/guardian/csnx/blob/1be3fd98ed527ccf0f1b8e21f10039e23fdb3fb7/libs/%40guardian/tsconfig/tsconfig.json
+  "compilerOptions": {
+    "noImplicitReturns": true,
+    "noUncheckedIndexedAccess": false, // disabled to prevent errors in C-style loops: https://github.com/guardian/coding-exercise-project/pull/111#discussion_r1481440786
+    "noUnusedLocals": true,
+    "strict": true
+  }
+}
diff --git a/typescript-deno/deno.lock b/typescript-deno/deno.lock
new file mode 100644
index 0000000..a1f6fd9
--- /dev/null
+++ b/typescript-deno/deno.lock
@@ -0,0 +1,9 @@
+{
+  "version": "3",
+  "remote": {
+    "https://deno.land/std@0.153.0/fmt/colors.ts": "ff7dc9c9f33a72bd48bc24b21bbc1b4545d8494a431f17894dbc5fe92a938fc4",
+    "https://deno.land/std@0.153.0/testing/_diff.ts": "141f978a283defc367eeee3ff7b58aa8763cf7c8e0c585132eae614468e9d7b8",
+    "https://deno.land/std@0.153.0/testing/_format.ts": "cd11136e1797791045e639e9f0f4640d5b4166148796cad37e6ef75f7d7f3832",
+    "https://deno.land/std@0.153.0/testing/asserts.ts": "d6595cfc330b4233546a047a0d7d57940771aa9d97a172ceb91e84ae6200b3af"
+  }
+}
diff --git a/typescript-deno/script/test b/typescript-deno/script/test
index a2b8b47..7a2d381 100755
--- a/typescript-deno/script/test
+++ b/typescript-deno/script/test
@@ -2,4 +2,4 @@
 
 set -e
 
-deno test src
+deno test src --watch