diff --git a/get-shit-done/workflows/discuss-phase.md b/get-shit-done/workflows/discuss-phase.md
index 1d268b1ba..acb2b5e8d 100644
--- a/get-shit-done/workflows/discuss-phase.md
+++ b/get-shit-done/workflows/discuss-phase.md
@@ -182,6 +182,26 @@ If "Skip": Exit workflow
 
 **If doesn't exist:**
 
+**Check for interrupted discussion checkpoint:**
+
+```bash
+ls ${phase_dir}/*-DISCUSS-CHECKPOINT.json 2>/dev/null || true
+```
+
+If a checkpoint file exists (previous session was interrupted before CONTEXT.md was written):
+
+**If `--auto`:** Auto-select "Resume" — load checkpoint and continue from last completed area.
+
+**Otherwise:** Use AskUserQuestion:
+- header: "Resume"
+- question: "Found interrupted discussion checkpoint ({N} areas completed out of {M}). Resume from where you left off?"
+- options:
+  - "Resume" — Load checkpoint, skip completed areas, continue discussion
+  - "Start fresh" — Delete checkpoint, start discussion from scratch
+
+If "Resume": Parse the checkpoint JSON. Load `decisions` into the internal accumulator. Set `areas_completed` to skip those areas. Continue to `present_gray_areas` with only the remaining areas.
+If "Start fresh": Delete the checkpoint file. Continue as if no checkpoint existed.
+
 Check `has_plans` and `plan_count` from init. **If `has_plans` is true:**
 
 **If `--auto`:** Auto-select "Continue and replan after". Log: `[auto] Plans exist — continuing with context capture, will replan after.`
@@ -719,6 +739,44 @@ Back to [current area]: [return to current question]"
 
 Track deferred ideas internally.
 
+**Incremental checkpoint — save after each area completes:**
+
+After each area is resolved (user says "Next area" or area auto-resolves in `--auto` mode), immediately write a checkpoint file with all decisions captured so far. This prevents data loss if the session is interrupted mid-discussion.
+
+**Checkpoint file:** `${phase_dir}/${padded_phase}-DISCUSS-CHECKPOINT.json`
+
+Write after each area:
+```json
+{
+  "phase": "{PHASE_NUM}",
+  "phase_name": "{phase_name}",
+  "timestamp": "{ISO timestamp}",
+  "areas_completed": ["Area 1", "Area 2"],
+  "areas_remaining": ["Area 3", "Area 4"],
+  "decisions": {
+    "Area 1": [
+      {"question": "...", "answer": "...", "options_presented": ["..."]},
+      {"question": "...", "answer": "...", "options_presented": ["..."]}
+    ],
+    "Area 2": [
+      {"question": "...", "answer": "...", "options_presented": ["..."]}
+    ]
+  },
+  "deferred_ideas": ["..."],
+  "canonical_refs": ["..."]
+}
+```
+
+This is a structured checkpoint, not the final CONTEXT.md — the `write_context` step still produces the canonical output. But if the session dies, the next `gsd:discuss-phase` invocation can detect this checkpoint and offer to resume from it instead of starting from scratch.
+
+**On session resume:** In the `check_existing` step, also check for `*-DISCUSS-CHECKPOINT.json`. If found and no CONTEXT.md exists:
+- Display: "Found interrupted discussion checkpoint ({N} areas completed). Resume from checkpoint?"
+- Options: "Resume" / "Start fresh"
+- On "Resume": Load the checkpoint, skip completed areas, continue from where it left off
+- On "Start fresh": Delete the checkpoint, proceed as normal
+
+**After write_context completes successfully:** Delete the checkpoint file — the canonical CONTEXT.md now has all decisions.
+
 **Track discussion log data internally:**
 For each question asked, accumulate:
 - Area name
@@ -933,6 +991,12 @@ Created: .planning/phases/${PADDED_PHASE}-${SLUG}/${PADDED_PHASE}-CONTEXT.md
 
 Write file.
 
+**Clean up checkpoint file** — CONTEXT.md is now the canonical record:
+
+```bash
+rm -f "${phase_dir}/${padded_phase}-DISCUSS-CHECKPOINT.json"
+```
+
 Commit phase context and discussion log:
 
 ```bash
@@ -1046,4 +1110,7 @@ Route to `confirm_creation` step (existing behavior — show manual next steps).
 - Deferred ideas preserved for future phases
 - STATE.md updated with session info
 - User knows next steps
+- Checkpoint file written after each area completes (incremental save)
+- Interrupted sessions can be resumed from checkpoint (no re-answering completed areas)
+- Checkpoint file cleaned up after successful CONTEXT.md write
 </success_criteria>
diff --git a/tests/discuss-checkpoint.test.cjs b/tests/discuss-checkpoint.test.cjs
new file mode 100644
index 000000000..935a58113
--- /dev/null
+++ b/tests/discuss-checkpoint.test.cjs
@@ -0,0 +1,72 @@
+/**
+ * GSD Tools Tests - discuss-phase incremental checkpoint saves
+ *
+ * Validates that the discuss-phase workflow includes incremental
+ * checkpoint logic to prevent answer loss on session interruption.
+ *
+ * Closes: #1485
+ */
+
+const { test, describe } = require('node:test');
+const assert = require('node:assert');
+const fs = require('fs');
+const path = require('path');
+
+describe('discuss-phase incremental checkpoint saves (#1485)', () => {
+  const workflowPath = path.join(__dirname, '..', 'get-shit-done', 'workflows', 'discuss-phase.md');
+
+  test('workflow writes checkpoint file after each area completes', () => {
+    const content = fs.readFileSync(workflowPath, 'utf8');
+    assert.ok(
+      content.includes('DISCUSS-CHECKPOINT.json'),
+      'workflow should reference checkpoint JSON file'
+    );
+    assert.ok(
+      content.includes('Incremental checkpoint') || content.includes('incremental checkpoint'),
+      'workflow should describe incremental checkpoint saves'
+    );
+  });
+
+  test('checkpoint includes decisions, areas completed, and areas remaining', () => {
+    const content = fs.readFileSync(workflowPath, 'utf8');
+    assert.ok(content.includes('areas_completed'), 'checkpoint should track completed areas');
+    assert.ok(content.includes('areas_remaining'), 'checkpoint should track remaining areas');
+    assert.ok(content.includes('"decisions"'), 'checkpoint should include decisions object');
+  });
+
+  test('check_existing step detects checkpoint for session resume', () => {
+    const content = fs.readFileSync(workflowPath, 'utf8');
+    // The check_existing step should look for checkpoint files
+    assert.ok(
+      content.includes('DISCUSS-CHECKPOINT.json') && content.includes('Resume'),
+      'check_existing should detect checkpoint and offer resume'
+    );
+  });
+
+  test('checkpoint is cleaned up after successful CONTEXT.md write', () => {
+    const content = fs.readFileSync(workflowPath, 'utf8');
+    assert.ok(
+      content.includes('rm -f') && content.includes('DISCUSS-CHECKPOINT'),
+      'checkpoint file should be deleted after successful write_context'
+    );
+  });
+
+  test('success criteria include checkpoint requirements', () => {
+    const content = fs.readFileSync(workflowPath, 'utf8');
+    const criteriaMatch = content.match(/<success_criteria>([\s\S]*?)<\/success_criteria>/);
+    const criteria = criteriaMatch ? criteriaMatch[1] : '';
+    assert.ok(criteria.includes('checkpoint') || criteria.includes('Checkpoint'),
+      'success criteria should mention checkpoints');
+    assert.ok(criteria.includes('resume') || criteria.includes('Resume'),
+      'success criteria should mention session resume capability');
+  });
+
+  test('auto mode also writes checkpoints', () => {
+    const content = fs.readFileSync(workflowPath, 'utf8');
+    // The checkpoint section should mention auto mode
+    assert.ok(
+      content.includes('auto-resolves') || content.includes('--auto'),
+      'checkpoint logic should apply to both interactive and auto modes'
+    );
+  });
+});