diff --git a/packages/js/.gitignore b/packages/js/.gitignore
index 600e365..3540683 100644
--- a/packages/js/.gitignore
+++ b/packages/js/.gitignore
@@ -1 +1,2 @@
-**/node_modules
\ No newline at end of file
+**/node_modules
+dist/
\ No newline at end of file
diff --git a/packages/js/core/LICENSE.md b/packages/js/LICENSE.md
similarity index 100%
rename from packages/js/core/LICENSE.md
rename to packages/js/LICENSE.md
diff --git a/packages/js/core/dist/document.cjs b/packages/js/core/dist/document.cjs
deleted file mode 100644
index 1cee5b5..0000000
--- a/packages/js/core/dist/document.cjs
+++ /dev/null
@@ -1 +0,0 @@
-"use strict";Object.defineProperties(exports,{__esModule:{value:!0},[Symbol.toStringTag]:{value:"Module"}});const i=require("./parser.cjs");function f(r,c=" "){const e=i.createLineData("",c);let n=!1;async function o(t=-1){if(n)n=!1;else{const a=await r();if(a==null)return!1;e.line=a,i.parseLine(e)}return l()<=t?(n=!0,!1):!0}const l=()=>e.level,u=(t=e.offsetHead)=>e.line.slice(t),s=()=>e.line.slice(e.offsetHead,e.offsetTail);return{next:o,level:l,line:u,head:s,tail:()=>e.line.slice(e.offsetTail),match:t=>t===s()}}exports.useDocument=f;
diff --git a/packages/js/core/dist/document.js b/packages/js/core/dist/document.js
deleted file mode 100644
index df07341..0000000
--- a/packages/js/core/dist/document.js
+++ /dev/null
@@ -1,28 +0,0 @@
-import { parseLine as r, createLineData as u } from "./parser.js";
-function h(s, f = " ") {
-  const e = u("", f);
-  let n = !1;
-  async function c(t = -1) {
-    if (n)
-      n = !1;
-    else {
-      const i = await s();
-      if (i == null)
-        return !1;
-      e.line = i, r(e);
-    }
-    return l() <= t ? (n = !0, !1) : !0;
-  }
-  const l = () => e.level, o = (t = e.offsetHead) => e.line.slice(t), a = () => e.line.slice(e.offsetHead, e.offsetTail);
-  return {
-    next: c,
-    level: l,
-    line: o,
-    head: a,
-    tail: () => e.line.slice(e.offsetTail),
-    match: (t) => t === a()
-  };
-}
-export {
-  h as useDocument
-};
diff --git a/packages/js/core/dist/index.cjs b/packages/js/core/dist/index.cjs
deleted file mode 100644
index 456ad3b..0000000
--- a/packages/js/core/dist/index.cjs
+++ /dev/null
@@ -1 +0,0 @@
-"use strict";Object.defineProperties(exports,{__esModule:{value:!0},[Symbol.toStringTag]:{value:"Module"}});const e=require("./parser.cjs"),r=require("./document.cjs");exports.createLineData=e.createLineData;exports.parseLine=e.parseLine;exports.useDocument=r.useDocument;
diff --git a/packages/js/core/dist/index.js b/packages/js/core/dist/index.js
deleted file mode 100644
index d0a9970..0000000
--- a/packages/js/core/dist/index.js
+++ /dev/null
@@ -1,7 +0,0 @@
-import { createLineData as o, parseLine as t } from "./parser.js";
-import { useDocument as m } from "./document.js";
-export {
-  o as createLineData,
-  t as parseLine,
-  m as useDocument
-};
diff --git a/packages/js/core/dist/parser.cjs b/packages/js/core/dist/parser.cjs
deleted file mode 100644
index d375452..0000000
--- a/packages/js/core/dist/parser.cjs
+++ /dev/null
@@ -1 +0,0 @@
-"use strict";Object.defineProperties(exports,{__esModule:{value:!0},[Symbol.toStringTag]:{value:"Module"}});function t(e="",r=" "){return{line:e,indent:r,level:0,offsetHead:0,offsetTail:0}}function f(e){if(typeof e!="object"||!e||typeof e.level!="number")throw new Error("'lineData' must be an object with string line and numeric level properties");if(typeof e.indent!="string"||e.indent.length===0||e.indent.length>1)throw new Error("'lineData.indent' must be a single-character string");if(typeof e.line!="string")throw new Error("'lineData.line' must be a string");let r=0;if(!e.line.length)e.level=e.level,e.offsetHead=0,e.offsetTail=0;else{for(;e.line[r]===e.indent&&r<=e.level+1;)++r;for(e.level=r,e.offsetHead=r,e.offsetTail=r;e.line[e.offsetTail]&&e.line[e.offsetTail]!==" ";)++e.offsetTail}return e}exports.createLineData=t;exports.parseLine=f;
diff --git a/packages/js/core/dist/parser.js b/packages/js/core/dist/parser.js
deleted file mode 100644
index 23141e1..0000000
--- a/packages/js/core/dist/parser.js
+++ /dev/null
@@ -1,25 +0,0 @@
-function f(e = "", r = " ") {
-  return { line: e, indent: r, level: 0, offsetHead: 0, offsetTail: 0 };
-}
-function o(e) {
-  if (typeof e != "object" || !e || typeof e.level != "number")
-    throw new Error("'lineData' must be an object with string line and numeric level properties");
-  if (typeof e.indent != "string" || e.indent.length === 0 || e.indent.length > 1)
-    throw new Error("'lineData.indent' must be a single-character string");
-  if (typeof e.line != "string")
-    throw new Error("'lineData.line' must be a string");
-  let r = 0;
-  if (!e.line.length)
-    e.level = e.level, e.offsetHead = 0, e.offsetTail = 0;
-  else {
-    for (; e.line[r] === e.indent && r <= e.level + 1; )
-      ++r;
-    for (e.level = r, e.offsetHead = r, e.offsetTail = r; e.line[e.offsetTail] && e.line[e.offsetTail] !== " "; )
-      ++e.offsetTail;
-  }
-  return e;
-}
-export {
-  f as createLineData,
-  o as parseLine
-};
diff --git a/packages/js/core/dist/readers/js-string.cjs b/packages/js/core/dist/readers/js-string.cjs
deleted file mode 100644
index 6963947..0000000
--- a/packages/js/core/dist/readers/js-string.cjs
+++ /dev/null
@@ -1,2 +0,0 @@
-"use strict";Object.defineProperties(exports,{__esModule:{value:!0},[Symbol.toStringTag]:{value:"Module"}});function n(r,e=0){const t=Array.isArray(r)?r:r.split(`
-`);return e--,()=>(e++,e>=t.length?null:t[e])}exports.createStringReader=n;
diff --git a/packages/js/core/dist/readers/js-string.js b/packages/js/core/dist/readers/js-string.js
deleted file mode 100644
index 34d7fd5..0000000
--- a/packages/js/core/dist/readers/js-string.js
+++ /dev/null
@@ -1,8 +0,0 @@
-function e(t, r = 0) {
-  const n = Array.isArray(t) ? t : t.split(`
-`);
-  return r--, () => (r++, r >= n.length ? null : n[r]);
-}
-export {
-  e as createStringReader
-};
diff --git a/packages/js/core/dist/readers/node-readline.cjs b/packages/js/core/dist/readers/node-readline.cjs
deleted file mode 100644
index 6c2f6bf..0000000
--- a/packages/js/core/dist/readers/node-readline.cjs
+++ /dev/null
@@ -1 +0,0 @@
-"use strict";Object.defineProperties(exports,{__esModule:{value:!0},[Symbol.toStringTag]:{value:"Module"}});const r=require("node:fs"),n=require("node:readline/promises"),t=e=>e&&typeof e=="object"&&"default"in e?e:{default:e},o=t(r),u=t(n);function d(e){const a=u.default.createInterface({input:o.default.createReadStream(e,"utf-8")})[Symbol.asyncIterator]();return async()=>(await a.next()).value}exports.createReadlineReader=d;
diff --git a/packages/js/core/dist/readers/node-readline.js b/packages/js/core/dist/readers/node-readline.js
deleted file mode 100644
index 303e70f..0000000
--- a/packages/js/core/dist/readers/node-readline.js
+++ /dev/null
@@ -1,11 +0,0 @@
-import r from "node:fs";
-import a from "node:readline/promises";
-function c(e) {
-  const t = a.createInterface({
-    input: r.createReadStream(e, "utf-8")
-  })[Symbol.asyncIterator]();
-  return async () => (await t.next()).value;
-}
-export {
-  c as createReadlineReader
-};
diff --git a/packages/js/core/package-lock.json b/packages/js/package-lock.json
similarity index 100%
rename from packages/js/core/package-lock.json
rename to packages/js/package-lock.json
diff --git a/packages/js/core/package.json b/packages/js/package.json
similarity index 95%
rename from packages/js/core/package.json
rename to packages/js/package.json
index a8a5568..6697c8d 100644
--- a/packages/js/core/package.json
+++ b/packages/js/package.json
@@ -26,7 +26,7 @@
     }
   },
   "scripts": {
-    "test": "vitest ./src",
+    "test": "node ./test/index.js",
     "dev": "vite build --watch",
     "build": "vite build"
   },
diff --git a/packages/js/core/src/document.ts b/packages/js/src/document.ts
similarity index 95%
rename from packages/js/core/src/document.ts
rename to packages/js/src/document.ts
index fcdd728..6fd60b5 100644
--- a/packages/js/core/src/document.ts
+++ b/packages/js/src/document.ts
@@ -42,7 +42,7 @@ export function useDocument (reader: Reader, indent: string = ' '): Document {
   const level = () => lineData.level
   const line = (startOffset: number = lineData.offsetHead) => lineData.line.slice(startOffset)
   const head = () => lineData.line.slice(lineData.offsetHead, lineData.offsetTail)
-  const tail = () => lineData.line.slice(lineData.offsetTail)
+  const tail = () => lineData.line.slice(lineData.offsetTail + 1) // Skip the space
   const match = (matchHead: string): boolean => matchHead === head()
 
   return {
diff --git a/packages/js/core/src/index.ts b/packages/js/src/index.ts
similarity index 100%
rename from packages/js/core/src/index.ts
rename to packages/js/src/index.ts
diff --git a/packages/js/core/src/parser.test.ts b/packages/js/src/parser.test.ts
similarity index 100%
rename from packages/js/core/src/parser.test.ts
rename to packages/js/src/parser.test.ts
diff --git a/packages/js/core/src/parser.ts b/packages/js/src/parser.ts
similarity index 100%
rename from packages/js/core/src/parser.ts
rename to packages/js/src/parser.ts
diff --git a/packages/js/core/src/readers/js-string.ts b/packages/js/src/readers/js-string.ts
similarity index 100%
rename from packages/js/core/src/readers/js-string.ts
rename to packages/js/src/readers/js-string.ts
diff --git a/packages/js/core/src/readers/node-readline.ts b/packages/js/src/readers/node-readline.ts
similarity index 52%
rename from packages/js/core/src/readers/node-readline.ts
rename to packages/js/src/readers/node-readline.ts
index 5aebba8..99c5191 100644
--- a/packages/js/core/src/readers/node-readline.ts
+++ b/packages/js/src/readers/node-readline.ts
@@ -2,10 +2,18 @@ import fs from 'node:fs'
 import readline from 'node:readline/promises'
 import type { Reader } from './reader'
 
-export function createReadlineReader(path: string): Reader {
+export function createFileReader(path: string): Reader {
   const it = readline.createInterface({
     input: fs.createReadStream(path, 'utf-8'),
   })[Symbol.asyncIterator]()
 
   return async () => (await it.next()).value
 }
+
+export function createStdinReader(): Reader {
+  const it = readline.createInterface({
+    input: process.stdin
+  })[Symbol.asyncIterator]()
+
+  return async () => (await it.next()).value
+}
diff --git a/packages/js/core/src/readers/reader.ts b/packages/js/src/readers/reader.ts
similarity index 100%
rename from packages/js/core/src/readers/reader.ts
rename to packages/js/src/readers/reader.ts
diff --git a/packages/js/test/index.js b/packages/js/test/index.js
new file mode 100644
index 0000000..5459686
--- /dev/null
+++ b/packages/js/test/index.js
@@ -0,0 +1,23 @@
+import { createLineData, parseLine, useDocument } from '@terrace/core'
+import { createStdinReader } from '@terrace/core/readers/node-readline'
+
+const testName = process.argv[2]
+
+
+const tests = {
+  'linedata:basic': async () => {
+    const { level, line, head, tail, next } = useDocument(createStdinReader())
+    while(await next()) {
+      console.log(`level: ${level()} | head: ${head()} | tail: ${tail()} | line: ${line()}`)
+    }
+  },
+  'linedata:tabs': async () => {
+    const { level, line, head, tail, next } = useDocument(createStdinReader(), '\t')
+    while(await next()) {
+      console.log(`level: ${level()} | head: ${head()} | tail: ${tail()} | line: ${line()}`)
+    }
+  }
+}
+
+const test = tests[testName]
+await test()
\ No newline at end of file
diff --git a/packages/js/core/tsconfig.json b/packages/js/tsconfig.json
similarity index 100%
rename from packages/js/core/tsconfig.json
rename to packages/js/tsconfig.json
diff --git a/packages/js/core/vite.config.js b/packages/js/vite.config.js
similarity index 100%
rename from packages/js/core/vite.config.js
rename to packages/js/vite.config.js
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d2a7ff3..539d574 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -8,11 +8,11 @@ importers:
       jest: ^29.4.1
       turbo: ^1.7.3
     devDependencies:
-      '@terrace/core': link:packages/js/core
+      '@terrace/core': link:packages/js
       jest: 29.4.1
       turbo: 1.7.3
 
-  packages/js/core:
+  packages/js:
     specifiers:
       vite: ^3.2.3
       vitest: ^0.24.5
@@ -24,7 +24,7 @@ importers:
     specifiers:
       '@terrace/core': workspace:*
     dependencies:
-      '@terrace/core': link:../packages/js/core
+      '@terrace/core': link:../packages/js
 
 packages:
 
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index f377811..53d3481 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -1,4 +1,4 @@
 packages:
   - "./test"
-  - "./packages/js/*"
+  - "./packages/*"
   - "./experiments/*"
diff --git a/test/package.json b/test/package.json
index a396e46..42d5a40 100644
--- a/test/package.json
+++ b/test/package.json
@@ -2,7 +2,7 @@
   "name": "@terrace/test",
   "type": "module",
   "scripts": {
-    "test": "NODE_OPTIONS=--experimental-vm-modules jest"
+    "test": "NODE_OPTIONS=--experimental-vm-modules NODE_NO_WARNINGS=1 jest"
   },
   "dependencies": {
     "@terrace/core": "workspace:*"
diff --git a/test/test-runner.test.js b/test/test-runner.test.js
index 84c0473..f494a6f 100644
--- a/test/test-runner.test.js
+++ b/test/test-runner.test.js
@@ -1,43 +1,83 @@
 import { expect } from 'chai'
 import fs from 'node:fs/promises'
+import { execSync } from 'node:child_process'
 import { useDocument } from '@terrace/core'
-import { createReadlineReader } from '@terrace/core/readers/node-readline'
+import { createFileReader } from '@terrace/core/readers/node-readline'
 
 async function loadTests(path) {
-  const { next, level, head, tail, line, match } = useDocument(createReadlineReader(path))
+  const { next, level, head, tail, line, match } = useDocument(createFileReader(path))
 
-  const tests = {}
+  const descriptions = {}
 
   while (await next()) {
     if (!head() || match('#schema')) continue
+    const tests = descriptions[tail()] = []
+
     const rootLevel = level()
-
-    const test = tests[tail().trim()] = { input: [], output: [] }
-
     while (await next(rootLevel)) {
-      const testLevel = level()
-      if (match('input')) {
-        while (await next(testLevel)) {
-          test.input.push(line(testLevel))
-        }
-      }
+      if (!match('it')) continue
 
-      if (match('output')) {
-        while (await next(testLevel)) {
-          test.output.push(line(testLevel))
+      const test = { it: tail(), packages: [], key: '', input: [], output: [] }
+      tests.push(test)
+
+      const testLevel = level()
+      while (await next(testLevel)) {
+        if (match('key')) test.key = tail()
+        if (match('packages')) test.packages = tail().split(' ')
+
+        const propertyLevel = level()
+        if (match('input')) {
+          // TODO: Find a way to handle newlines better.
+          if (tail().startsWith('literal')) {
+            test.input = tail()
+              .split('literal ').join('')
+              .replaceAll('\\n', '\n')
+              .replaceAll('\\t', '\t')
+            continue
+          }
+
+          while (await next(propertyLevel)) test.input.push(line(propertyLevel))
+          test.input = test.input.join('\n').trim()
+        }
+
+        if (match('output')) {
+          // TODO: Find a way to handle newlines better.
+          if (tail().startsWith('literal')) {
+            test.output = tail().split('literal ').join('').replace('\\n', '\n')
+            continue
+          }
+
+          while (await next(propertyLevel)) test.output.push(line())
         }
       }
+      test.output = test.output.join('\n').trim()
     }
   }
 
-
-  return tests
+  return descriptions
 }
 
-it('Runs a basic test', async () => {
-  const tests = await loadTests('./tests.tce', 'utf-8')
+function callTest(pkg, name, input) {
+  return new Promise((resolve, reject) => {
+    const stdout = execSync(`npm run --silent test ${name}`, {
+      cwd: `../packages/${pkg}`,
+      input
+    })
 
-  console.log(tests)
+    resolve(stdout.toString().trim())
+  })
+}
 
-  expect(1).to.equal(1)
-})
+const descriptions = await loadTests('./tests.tce')
+
+for (const [name, tests] of Object.entries(descriptions)) {
+  describe(name, () => {
+    for (const test of tests) {
+      test.packages.forEach(pkg => {
+        it(`${pkg}: ${test.it}`, async () => {
+          expect(await callTest(pkg, test.key, test.input)).to.equal(test.output)
+        })
+      })
+    }
+  })
+}
\ No newline at end of file
diff --git a/test/tests.tce b/test/tests.tce
index 0d2addb..04f46a5 100644
--- a/test/tests.tce
+++ b/test/tests.tce
@@ -1,8 +1,54 @@
 #schema test
 
-test Basic
-  input
-    key value
+describe LineData
+  it Handles a blank line at indent level 0
+    key linedata:basic
+    packages js
+    input literal \n
+    output
+      level: 0 | head:  | tail:  | line:
 
-  output
-    level: 0 | head: key | tail: value | line: key value
+  it Handles a blank line with a single space at indent level 1
+    key linedata:basic
+    packages js
+    input literal  \n
+    output
+      level: 1 | head:  | tail:  | line:
+
+  it Handles a blank line with two spaces
+    key linedata:basic
+    packages js
+    input literal   \n
+    output
+      level: 2 | head:  | tail:  | line:
+
+  it Handles a normal line at indent level 1
+    key linedata:basic
+    packages js
+    input literal  line 1
+    output
+      level: 1 | head: line | tail: 1 | line: line 1
+
+  it Handles a normal line at indent level 1 indented with tabs
+    key linedata:tabs
+    packages js
+    input literal \tline 1
+    output
+      level: 1 | head: line | tail: 1 | line: line 1
+
+  it Handles a normal line at indent level 2 indented with tabs
+    key linedata:tabs
+    packages js
+    input literal \t\tline 1
+    output
+      level: 2 | head: line | tail: 1 | line: line 1
+
+  it Nests a normal line under a preceding normal line
+    key linedata:basic
+    packages js
+    input
+      line 1
+       line 2
+    output
+      level: 0 | head: line | tail: 1 | line: line 1
+      level: 1 | head: line | tail: 2 | line: line 2