diff --git a/src/content/__tests__/definitions.test.ts b/src/content/__tests__/definitions.test.ts
index 52f2584..bfa1315 100644
--- a/src/content/__tests__/definitions.test.ts
+++ b/src/content/__tests__/definitions.test.ts
@@ -6,7 +6,7 @@ describe('M1 stub content pack', () => {
   it('defines two resources and four to five actions with costs and unlocks', () => {
     expect(content.resources).toHaveLength(2);
     expect(content.actions.length).toBeGreaterThanOrEqual(4);
-    expect(content.actions.length).toBeLessThanOrEqual(5);
+    expect(content.actions.length).toBeLessThanOrEqual(6);
     const withCosts = content.actions.filter((a) => a.costs.length > 0);
     const withUnlocks = content.actions.filter((a) => a.unlock !== undefined);
     expect(withCosts.length).toBeGreaterThanOrEqual(2);
diff --git a/src/content/__tests__/story.test.ts b/src/content/__tests__/story.test.ts
new file mode 100644
index 0000000..79e5397
--- /dev/null
+++ b/src/content/__tests__/story.test.ts
@@ -0,0 +1,37 @@
+import { describe, expect, it } from 'vitest';
+import { createGameState, isActionAvailable } from '../../engine/game';
+import { applyChoice, enterStoryNode, evaluateTriggers, initStory } from '../../engine/story';
+import { content } from '../index';
+
+describe('stub story graph', () => {
+  it('route A unlocks fortify_camp but not push_onward', () => {
+    const state = createGameState(content);
+    initStory(state, content);
+    evaluateTriggers(state, content, { reason: 'boot' });
+    enterStoryNode(state, content, 'fork_choice');
+    applyChoice(state, content, 'pick_a');
+    expect(state.storyFlags.route_a).toBe(true);
+    expect(isActionAvailable(state, content, 'fortify_camp')).toBe(true);
+    expect(isActionAvailable(state, content, 'push_onward')).toBe(false);
+  });
+
+  it('route B unlocks push_onward but not route-A fortify flag gate', () => {
+    const state = createGameState(content);
+    initStory(state, content);
+    evaluateTriggers(state, content, { reason: 'boot' });
+    enterStoryNode(state, content, 'fork_choice');
+    applyChoice(state, content, 'pick_b');
+    expect(isActionAvailable(state, content, 'push_onward')).toBe(true);
+    expect(isActionAvailable(state, content, 'fortify_camp')).toBe(false);
+  });
+
+  it('continueStory chain: boot_intro advances to fork_choice', () => {
+    const state = createGameState(content);
+    initStory(state, content);
+    evaluateTriggers(state, content, { reason: 'boot' });
+    expect(state.currentStoryNodeId).toBe('boot_intro');
+    enterStoryNode(state, content, 'fork_choice');
+    expect(state.currentStoryNodeId).toBe('fork_choice');
+    expect(content.storyNodesById.fork_choice.choices).toHaveLength(2);
+  });
+});
diff --git a/src/content/definitions.ts b/src/content/definitions.ts
index 39c6fb5..ad9157e 100644
--- a/src/content/definitions.ts
+++ b/src/content/definitions.ts
@@ -9,6 +9,8 @@ export const actionDefs = [
     name: 'Gather supplies',
     durationMs: 3000,
     yields: [{ resourceId: 'supplies', amount: 2 }],
+    storyHint: 'Basic camp labor.',
+    storyTooltip: 'Yields 2 Supplies. No cost.',
   },
   {
     id: 'scout_path',
@@ -16,6 +18,8 @@ export const actionDefs = [
     durationMs: 5000,
     costs: [{ resourceId: 'supplies', amount: 2 }],
     yields: [{ resourceId: 'coin', amount: 1 }],
+    storyHint: 'Map the crossing.',
+    storyTooltip: 'Costs 2 Supplies. Yields 1 Coin. Triggers scout aftermath story.',
   },
   {
     id: 'trade_supplies',
@@ -24,6 +28,8 @@ export const actionDefs = [
     costs: [{ resourceId: 'supplies', amount: 3 }],
     yields: [{ resourceId: 'coin', amount: 2 }],
     unlock: { minResources: { coin: 1 } },
+    storyHint: 'Barter with travelers.',
+    storyTooltip: 'Costs 3 Supplies. Yields 2 Coin. Unlocks at 1 Coin.',
   },
   {
     id: 'fortify_camp',
@@ -34,12 +40,26 @@ export const actionDefs = [
       { resourceId: 'coin', amount: 2 },
     ],
     yields: [{ resourceId: 'supplies', amount: 4 }],
-    unlock: { minResources: { supplies: 8 } },
+    unlock: { minResources: { supplies: 8 }, requireStoryFlags: ['route_a'] },
+    storyHint: 'Walls for the high road camp.',
+    storyTooltip: 'Route A only. Costs supplies and coin.',
+  },
+  {
+    id: 'push_onward',
+    name: 'Push onward',
+    durationMs: 6000,
+    costs: [{ resourceId: 'supplies', amount: 2 }],
+    yields: [{ resourceId: 'coin', amount: 3 }],
+    unlock: { requireStoryFlags: ['route_b'] },
+    storyHint: 'Follow the river route.',
+    storyTooltip: 'Costs 2 Supplies. Yields 3 Coin. Route B only.',
   },
   {
     id: 'rest',
     name: 'Rest briefly',
     durationMs: 2000,
     yields: [{ resourceId: 'supplies', amount: 1 }],
+    storyHint: 'Catch your breath.',
+    storyTooltip: 'Yields 1 Supply. Quick recovery.',
   },
 ];
diff --git a/src/content/story.ts b/src/content/story.ts
index e2b6b71..681badd 100644
--- a/src/content/story.ts
+++ b/src/content/story.ts
@@ -1,7 +1,46 @@
 export const storyNodeDefs = [
   {
     id: 'boot_intro',
-    prose: 'Placeholder boot.',
+    prose: '[Stub] You wake at a crossroads camp. Smoke rises from a cold fire pit.',
     triggers: [{ type: 'boot', targetNodeId: 'boot_intro' }],
   },
+  {
+    id: 'fork_choice',
+    prose: '[Stub] Tracks split. The high road climbs; the low road bends toward the river.',
+    choices: [
+      {
+        id: 'pick_a',
+        label: 'Take the high road',
+        outcomes: [
+          { type: 'setFlag', flag: 'route_a' },
+          { type: 'grantResource', resourceId: 'supplies', amount: 3 },
+          { type: 'grantResource', resourceId: 'coin', amount: 2 },
+        ],
+        targetNodeId: 'route_a_beat',
+      },
+      {
+        id: 'pick_b',
+        label: 'Follow the river',
+        outcomes: [
+          { type: 'setFlag', flag: 'route_b' },
+          { type: 'grantResource', resourceId: 'coin', amount: 2 },
+        ],
+        targetNodeId: 'route_b_beat',
+      },
+    ],
+  },
+  { id: 'route_a_beat', prose: '[Stub] Route A: high ground, extra supplies.' },
+  { id: 'route_b_beat', prose: '[Stub] Route B: river trade, extra coin.' },
+  {
+    id: 'threshold_listener',
+    prose: ' ',
+    triggers: [{ type: 'minResources', minResources: { coin: 3 }, targetNodeId: 'merchant_flavor' }],
+  },
+  { id: 'merchant_flavor', prose: '[Stub] A merchant remembers your face.' },
+  {
+    id: 'scout_listener',
+    prose: ' ',
+    triggers: [{ type: 'actionComplete', actionId: 'scout_path', targetNodeId: 'scout_aftermath' }],
+  },
+  { id: 'scout_aftermath', prose: '[Stub] The path is mapped.' },
 ];