diff --git a/plugins/interface/components/primitives.test.tsx b/plugins/interface/components/primitives.test.tsx
new file mode 100644
index 0000000..12ec5fc
--- /dev/null
+++ b/plugins/interface/components/primitives.test.tsx
@@ -0,0 +1,133 @@
+import { renderToString } from 'hono/jsx/dom/server'
+import { describe, expect, it } from 'vitest'
+
+import { Avatar } from './avatar'
+import { Card } from './card'
+import { Input } from './input/Input'
+import { Label } from './label/Label'
+import { Loader } from './loader/Loader'
+import { Toggle } from './toggle'
+
+describe('interface primitive components', () => {
+    it('renders avatar links with fallback initials and custom classes', () => {
+        const html = renderToString(
+            <Avatar as="a" href="/profile" username="outerbase" class="extra" />
+        )
+
+        expect(html).toContain('<a')
+        expect(html).toContain('href="/profile"')
+        expect(html).toContain('extra')
+        expect(html).toContain('>O</p>')
+    })
+
+    it('renders avatar images with accessible alt text and selected state', () => {
+        const html = renderToString(
+            <Avatar
+                image="/avatar.png"
+                toggled
+                username="Ada"
+                data-testid="avatar"
+            />
+        )
+
+        expect(html).toContain('<button')
+        expect(html).toContain('after:opacity-100')
+        expect(html).toContain('src="/avatar.png"')
+        expect(html).toContain('alt="Ada"')
+        expect(html).toContain('data-testid="avatar"')
+    })
+
+    it('renders cards as links or divs with variant classes', () => {
+        const link = renderToString(
+            <Card as="a" href="/docs" variant="primary">
+                Docs
+            </Card>
+        )
+        const panel = renderToString(
+            <Card variant="secondary" data-testid="card">
+                Panel
+            </Card>
+        )
+
+        expect(link).toContain('<a')
+        expect(link).toContain('href="/docs"')
+        expect(link).toContain('btn-primary')
+        expect(link).toContain('Docs')
+
+        expect(panel).toContain('<div')
+        expect(panel).toContain('btn-secondary')
+        expect(panel).toContain('data-testid="card"')
+    })
+
+    it('renders labels with validation messaging only when invalid', () => {
+        const invalid = renderToString(
+            <Label
+                title="Database"
+                required
+                requiredDescription="Required"
+                isValid={false}
+            >
+                <input />
+            </Label>
+        )
+        const valid = renderToString(
+            <Label
+                title="Database"
+                required
+                requiredDescription="Required"
+                isValid
+            />
+        )
+
+        expect(invalid).toContain('Database')
+        expect(invalid).toContain('*')
+        expect(invalid).toContain('Required')
+        expect(valid).not.toContain('Required')
+    })
+
+    it('renders loader and toggle sizing/state classes', () => {
+        const loader = renderToString(<Loader size={18} class="spin" />)
+        const toggle = renderToString(
+            <Toggle onClick={() => undefined} size="lg" toggled />
+        )
+
+        expect(loader).toContain('class="spin"')
+        expect(loader).toContain('style="height: 18px; width: 18px"')
+        expect(toggle).toContain('h-7.5 w-12.5')
+        expect(toggle).toContain('translate-x-full')
+    })
+
+    it('renders input wrappers with prefix, suffix, and invalid state', () => {
+        const wrapped = renderToString(
+            <Input
+                initialValue="abc"
+                isValid={false}
+                onValueChange={() => undefined}
+                placeholder="Filter"
+                preText="$"
+                postText="USD"
+                size="sm"
+            />
+        )
+        const plain = renderToString(
+            <Input
+                className="extra-input"
+                initialValue="plain"
+                onValueChange={() => undefined}
+                size="lg"
+            />
+        )
+
+        expect(wrapped).toContain('<div')
+        expect(wrapped).toContain('ob-size-sm')
+        expect(wrapped).toContain('>$</span>')
+        expect(wrapped).toContain('>USD</span>')
+        expect(wrapped).toContain('placeholder="Filter"')
+        expect(wrapped).toContain('text-ob-destructive')
+
+        expect(plain).toContain('<input')
+        expect(plain).toContain('extra-input')
+        expect(plain).toContain('ob-size-lg')
+        expect(plain).toContain('value="plain"')
+    })
+})
diff --git a/plugins/interface/pages/template/index.test.tsx b/plugins/interface/pages/template/index.test.tsx
new file mode 100644
index 0000000..6e3f13c
--- /dev/null
+++ b/plugins/interface/pages/template/index.test.tsx
@@ -0,0 +1,47 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+const hydrateRoot = vi.hoisted(() => vi.fn())
+
+vi.mock('hono/jsx/dom/client', () => ({
+    hydrateRoot,
+}))
+
+vi.mock('../../public/global.css', () => ({}))
+
+describe('template page entrypoint', () => {
+    beforeEach(() => {
+        vi.resetModules()
+        hydrateRoot.mockClear()
+    })
+
+    afterEach(() => {
+        vi.unstubAllGlobals()
+    })
+
+    it('does not hydrate when the template root is missing', async () => {
+        const querySelector = vi.fn(() => null)
+        vi.stubGlobal('document', { querySelector })
+
+        await import('./index')
+
+        expect(querySelector).toHaveBeenCalledWith(
+            '#root[data-client="template"]'
+        )
+        expect(hydrateRoot).not.toHaveBeenCalled()
+    })
+
+    it('hydrates the template page when the server root is present', async () => {
+        const root = {
+            dataset: {
+                serverProps: '{}',
+            },
+        }
+        const querySelector = vi.fn(() => root)
+        vi.stubGlobal('document', { querySelector })
+
+        await import('./index')
+
+        expect(hydrateRoot).toHaveBeenCalledTimes(1)
+        expect(hydrateRoot).toHaveBeenCalledWith(root, expect.any(Object))
+    })
+})
diff --git a/src/import/json.test.ts b/src/import/json.test.ts
index 04b4ed1..053dcf6 100644
--- a/src/import/json.test.ts
+++ b/src/import/json.test.ts
@@ -83,6 +83,38 @@ describe('JSON Import Module', () => {
         expect(jsonResponse.error).toContain('Invalid JSON format')
     })
 
+    it.each([
+        ['missing data', {}],
+        ['null data', { data: null }],
+        ['object data', { data: { id: 1, name: 'Alice' } }],
+    ])(
+        'should return 400 without inserts for application/json with %s',
+        async (_caseName, payload) => {
+            const request = new Request('http://localhost', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify(payload),
+            })
+
+            const response = await importTableFromJsonRoute(
+                'users',
+                request,
+                mockDataSource,
+                mockConfig
+            )
+
+            expect(response.status).toBe(400)
+            expect(executeOperation).not.toHaveBeenCalled()
+            const jsonResponse = (await response.json()) as {
+                error?: string
+                result?: any
+            }
+            expect(jsonResponse.error).toBe(
+                'Invalid JSON format. Expected an object with "data" array and optional "columnMapping".'
+            )
+        }
+    )
+
     it('should return 400 if no file is uploaded in multipart form-data', async () => {
         const formData = new FormData()
 
@@ -106,6 +138,36 @@ describe('JSON Import Module', () => {
         expect(jsonResponse.error).toBe('No file uploaded')
     })
 
+    it('should return 400 if uploaded JSON file is invalid', async () => {
+        const formData = new FormData()
+        formData.set(
+            'file',
+            new File(['not json'], 'users.json', {
+                type: 'application/json',
+            })
+        )
+
+        const request = new Request('http://localhost', {
+            method: 'POST',
+            body: formData,
+        })
+
+        const response = await importTableFromJsonRoute(
+            'users',
+            request,
+            mockDataSource,
+            mockConfig
+        )
+
+        expect(response.status).toBe(400)
+        expect(executeOperation).not.toHaveBeenCalled()
+        const jsonResponse = (await response.json()) as {
+            error?: string
+            result?: any
+        }
+        expect(jsonResponse.error).toBe('Invalid file upload')
+    })
+
     it('should successfully insert valid JSON data into the table', async () => {
         vi.mocked(executeOperation).mockResolvedValue([])
 
@@ -136,6 +198,83 @@ describe('JSON Import Module', () => {
         )
     })
 
+    it('should apply column mapping when inserting JSON records', async () => {
+        vi.mocked(executeOperation).mockResolvedValue([])
+
+        const request = new Request('http://localhost', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({
+                data: [{ fullName: 'Alice', emailAddress: 'alice@test.dev' }],
+                columnMapping: {
+                    fullName: 'name',
+                    emailAddress: 'email',
+                },
+            }),
+        })
+
+        const response = await importTableFromJsonRoute(
+            'users',
+            request,
+            mockDataSource,
+            mockConfig
+        )
+
+        expect(response.status).toBe(200)
+        expect(executeOperation).toHaveBeenCalledWith(
+            [
+                {
+                    sql: 'INSERT INTO users (name, email) VALUES (?, ?)',
+                    params: ['Alice', 'alice@test.dev'],
+                },
+            ],
+            mockDataSource,
+            mockConfig
+        )
+    })
+
+    it('should insert valid JSON data from multipart file upload', async () => {
+        vi.mocked(executeOperation).mockResolvedValue([])
+
+        const formData = new FormData()
+        formData.set(
+            'file',
+            new File(
+                [
+                    JSON.stringify({
+                        data: [{ id: 1, name: 'Alice' }],
+                    }),
+                ],
+                'users.json',
+                { type: 'application/json' }
+            )
+        )
+
+        const request = new Request('http://localhost', {
+            method: 'POST',
+            body: formData,
+        })
+
+        const response = await importTableFromJsonRoute(
+            'users',
+            request,
+            mockDataSource,
+            mockConfig
+        )
+
+        expect(response.status).toBe(200)
+        expect(executeOperation).toHaveBeenCalledWith(
+            [
+                {
+                    sql: 'INSERT INTO users (id, name) VALUES (?, ?)',
+                    params: [1, 'Alice'],
+                },
+            ],
+            mockDataSource,
+            mockConfig
+        )
+    })
+
     it('should return partial success if some inserts fail', async () => {
         vi.mocked(executeOperation)
             .mockResolvedValueOnce([])
diff --git a/src/public-entrypoints.test.ts b/src/public-entrypoints.test.ts
new file mode 100644
index 0000000..cdd5b46
--- /dev/null
+++ b/src/public-entrypoints.test.ts
@@ -0,0 +1,54 @@
+import { describe, expect, it, vi } from 'vitest'
+
+import { ChangeDataCapturePlugin } from '../plugins/cdc'
+import { ClerkPlugin } from '../plugins/clerk'
+import { QueryLogPlugin } from '../plugins/query-log'
+import { ResendPlugin } from '../plugins/resend'
+import { SqlMacrosPlugin } from '../plugins/sql-macros'
+import { StripeSubscriptionPlugin } from '../plugins/stripe'
+import { StudioPlugin } from '../plugins/studio'
+import { WebSocketPlugin } from '../plugins/websocket'
+import * as publicApi from '../dist'
+import * as pluginApi from '../dist/plugins'
+import { StarbaseDBDurableObject } from './do'
+import { StarbaseDB } from './handler'
+
+vi.mock('cloudflare:workers', () => {
+    return {
+        DurableObject: class MockDurableObject {},
+    }
+})
+
+describe('public package entrypoints', () => {
+    it('exposes runtime APIs from the root package export', () => {
+        expect(publicApi.StarbaseDB).toBe(StarbaseDB)
+        expect(publicApi.StarbaseDBDurableObject).toBe(StarbaseDBDurableObject)
+        expect(Object.keys(publicApi).sort()).toEqual([
+            'StarbaseDB',
+            'StarbaseDBDurableObject',
+        ])
+    })
+
+    it('exposes documented plugin constructors from the plugin export', () => {
+        expect(pluginApi.StudioPlugin).toBe(StudioPlugin)
+        expect(pluginApi.WebSocketPlugin).toBe(WebSocketPlugin)
+        expect(pluginApi.SqlMacrosPlugin).toBe(SqlMacrosPlugin)
+        expect(pluginApi.StripeSubscriptionPlugin).toBe(
+            StripeSubscriptionPlugin
+        )
+        expect(pluginApi.ChangeDataCapturePlugin).toBe(ChangeDataCapturePlugin)
+        expect(pluginApi.QueryLogPlugin).toBe(QueryLogPlugin)
+        expect(pluginApi.ResendPlugin).toBe(ResendPlugin)
+        expect(pluginApi.ClerkPlugin).toBe(ClerkPlugin)
+        expect(Object.keys(pluginApi).sort()).toEqual([
+            'ChangeDataCapturePlugin',
+            'ClerkPlugin',
+            'QueryLogPlugin',
+            'ResendPlugin',
+            'SqlMacrosPlugin',
+            'StripeSubscriptionPlugin',
+            'StudioPlugin',
+            'WebSocketPlugin',
+        ])
+    })
+})