diff --git a/__tests__/job-config.test.ts b/__tests__/job-config.test.ts
new file mode 100644
index 0000000..3a7af58
--- /dev/null
+++ b/__tests__/job-config.test.ts
@@ -0,0 +1,97 @@
+import { describe, it, expect } from 'vitest'
+import { getKindDefault, resolveJobConfig } from '../src/lib/job-config.js'
+
+const KIND_EXPECTED = {
+  IDEA_GRILL: { model: 'claude-sonnet-4-6', thinking_budget: 12000, permission_mode: 'plan', max_turns: 15 },
+  IDEA_MAKE_PLAN: { model: 'claude-opus-4-7', thinking_budget: 24000, permission_mode: 'plan', max_turns: 20 },
+  PLAN_CHAT: { model: 'claude-sonnet-4-6', thinking_budget: 6000, permission_mode: 'plan', max_turns: 5 },
+  TASK_IMPLEMENTATION: { model: 'claude-sonnet-4-6', thinking_budget: 6000, permission_mode: 'bypassPermissions', max_turns: 50 },
+  SPRINT_IMPLEMENTATION: { model: 'claude-sonnet-4-6', thinking_budget: 6000, permission_mode: 'bypassPermissions', max_turns: null },
+} as const
+
+describe('getKindDefault', () => {
+  for (const [kind, expected] of Object.entries(KIND_EXPECTED)) {
+    it(`returnt de juiste defaults voor ${kind}`, () => {
+      const cfg = getKindDefault(kind)
+      expect(cfg.model).toBe(expected.model)
+      expect(cfg.thinking_budget).toBe(expected.thinking_budget)
+      expect(cfg.permission_mode).toBe(expected.permission_mode)
+      expect(cfg.max_turns).toBe(expected.max_turns)
+    })
+  }
+
+  it('valt terug op een veilige fallback voor onbekende kinds', () => {
+    const cfg = getKindDefault('SOMETHING_NEW')
+    expect(cfg.model).toBe('claude-sonnet-4-6')
+    expect(cfg.permission_mode).toBe('default')
+  })
+})
+
+describe('resolveJobConfig — geen overrides', () => {
+  for (const kind of Object.keys(KIND_EXPECTED)) {
+    it(`returnt kind-default voor ${kind} zonder overrides`, () => {
+      const cfg = resolveJobConfig({ kind }, {})
+      expect(cfg).toEqual(getKindDefault(kind))
+    })
+  }
+})
+
+describe('resolveJobConfig — cascade', () => {
+  it('product.preferred_model overrult kind-default', () => {
+    const cfg = resolveJobConfig({ kind: 'TASK_IMPLEMENTATION' }, { preferred_model: 'claude-haiku-4-5-20251001' })
+    expect(cfg.model).toBe('claude-haiku-4-5-20251001')
+  })
+
+  it('job.requested_model overrult product.preferred_model', () => {
+    const cfg = resolveJobConfig(
+      { kind: 'TASK_IMPLEMENTATION', requested_model: 'claude-opus-4-7' },
+      { preferred_model: 'claude-haiku-4-5-20251001' },
+    )
+    expect(cfg.model).toBe('claude-opus-4-7')
+  })
+
+  it('task.requires_opus overrult product.preferred_model', () => {
+    const cfg = resolveJobConfig(
+      { kind: 'TASK_IMPLEMENTATION' },
+      { preferred_model: 'claude-sonnet-4-6' },
+      { requires_opus: true },
+    )
+    expect(cfg.model).toBe('claude-opus-4-7')
+  })
+
+  it('task.requires_opus overrult ook job.requested_model = haiku', () => {
+    const cfg = resolveJobConfig(
+      { kind: 'TASK_IMPLEMENTATION', requested_model: 'claude-haiku-4-5-20251001' },
+      {},
+      { requires_opus: true },
+    )
+    expect(cfg.model).toBe('claude-opus-4-7')
+  })
+
+  it('job.requested_thinking_budget overrult kind-default', () => {
+    const cfg = resolveJobConfig({ kind: 'PLAN_CHAT', requested_thinking_budget: 1024 }, {})
+    expect(cfg.thinking_budget).toBe(1024)
+  })
+
+  it('product.thinking_budget_default overrult kind-default', () => {
+    const cfg = resolveJobConfig({ kind: 'IDEA_GRILL' }, { thinking_budget_default: 0 })
+    expect(cfg.thinking_budget).toBe(0)
+  })
+
+  it('product.preferred_permission_mode = acceptEdits overrult bypassPermissions voor TASK_IMPLEMENTATION', () => {
+    const cfg = resolveJobConfig(
+      { kind: 'TASK_IMPLEMENTATION' },
+      { preferred_permission_mode: 'acceptEdits' },
+    )
+    expect(cfg.permission_mode).toBe('acceptEdits')
+  })
+
+  it('max_turns en allowed_tools blijven kind-default ook met product- en job-overrides (geen V1-cascade)', () => {
+    const cfg = resolveJobConfig(
+      { kind: 'IDEA_GRILL', requested_model: 'claude-haiku-4-5-20251001' },
+      { preferred_model: 'claude-sonnet-4-6' },
+    )
+    expect(cfg.max_turns).toBe(15)
+    expect(cfg.allowed_tools).toEqual(['Read', 'Grep', 'Glob', 'WebSearch', 'AskUserQuestion'])
+  })
+})
diff --git a/src/lib/job-config.ts b/src/lib/job-config.ts
new file mode 100644
index 0000000..c615de1
--- /dev/null
+++ b/src/lib/job-config.ts
@@ -0,0 +1,120 @@
+// PBI-67: model + mode-selectie per ClaudeJob-kind.
+//
+// Override-cascade (eerste match wint):
+//   1. task.requires_opus === true       → forceer Opus
+//   2. job.requested_*  (snapshot bij enqueue)
+//   3. product.preferred_*
+//   4. KIND_DEFAULTS hieronder
+
+export type ClaudeModel =
+  | 'claude-opus-4-7'
+  | 'claude-sonnet-4-6'
+  | 'claude-haiku-4-5-20251001'
+
+export type PermissionMode = 'plan' | 'default' | 'acceptEdits' | 'bypassPermissions'
+
+export type JobConfig = {
+  model: ClaudeModel
+  thinking_budget: number // 0 = uit
+  permission_mode: PermissionMode
+  max_turns: number | null // null = onbegrensd
+  allowed_tools: string[] | null // null = alle
+}
+
+export type JobInput = {
+  kind: string
+  requested_model?: string | null
+  requested_thinking_budget?: number | null
+  requested_permission_mode?: string | null
+}
+
+export type ProductInput = {
+  preferred_model?: string | null
+  thinking_budget_default?: number | null
+  preferred_permission_mode?: string | null
+}
+
+export type TaskInput = {
+  requires_opus?: boolean | null
+}
+
+const KIND_DEFAULTS: Record<string, JobConfig> = {
+  IDEA_GRILL: {
+    model: 'claude-sonnet-4-6',
+    thinking_budget: 12000,
+    permission_mode: 'plan',
+    max_turns: 15,
+    allowed_tools: ['Read', 'Grep', 'Glob', 'WebSearch', 'AskUserQuestion'],
+  },
+  IDEA_MAKE_PLAN: {
+    model: 'claude-opus-4-7',
+    thinking_budget: 24000,
+    permission_mode: 'plan',
+    max_turns: 20,
+    allowed_tools: ['Read', 'Grep', 'Glob', 'WebSearch', 'AskUserQuestion', 'Write'],
+  },
+  PLAN_CHAT: {
+    model: 'claude-sonnet-4-6',
+    thinking_budget: 6000,
+    permission_mode: 'plan',
+    max_turns: 5,
+    allowed_tools: ['Read', 'Grep', 'AskUserQuestion'],
+  },
+  TASK_IMPLEMENTATION: {
+    model: 'claude-sonnet-4-6',
+    thinking_budget: 6000,
+    permission_mode: 'bypassPermissions',
+    max_turns: 50,
+    allowed_tools: null,
+  },
+  SPRINT_IMPLEMENTATION: {
+    model: 'claude-sonnet-4-6',
+    thinking_budget: 6000,
+    permission_mode: 'bypassPermissions',
+    max_turns: null,
+    allowed_tools: null,
+  },
+}
+
+const FALLBACK: JobConfig = {
+  model: 'claude-sonnet-4-6',
+  thinking_budget: 6000,
+  permission_mode: 'default',
+  max_turns: 50,
+  allowed_tools: null,
+}
+
+export function getKindDefault(kind: string): JobConfig {
+  return KIND_DEFAULTS[kind] ?? FALLBACK
+}
+
+// max_turns en allowed_tools blijven kind-default (geen product/task override
+// in V1 — als de behoefte ontstaat, voeg analoge velden toe aan Product/Task).
+export function resolveJobConfig(
+  job: JobInput,
+  product: ProductInput,
+  task?: TaskInput,
+): JobConfig {
+  const base = getKindDefault(job.kind)
+
+  const model = (
+    task?.requires_opus
+      ? 'claude-opus-4-7'
+      : job.requested_model ?? product.preferred_model ?? base.model
+  ) as ClaudeModel
+
+  const thinking_budget =
+    job.requested_thinking_budget ?? product.thinking_budget_default ?? base.thinking_budget
+
+  const permission_mode = (job.requested_permission_mode ??
+    product.preferred_permission_mode ??
+    base.permission_mode) as PermissionMode
+
+  return {
+    model,
+    thinking_budget,
+    permission_mode,
+    max_turns: base.max_turns,
+    allowed_tools: base.allowed_tools,
+  }
+}