feat(workflow): add auto-advance pipeline (--auto flag + workflow.auto_advance config)

Add opt-in mechanism to chain discuss → plan → execute automatically
via Task() subagents, eliminating manual /clear + paste overhead.

- Add `--auto` flag to discuss-phase and plan-phase commands
- Add `workflow.auto_advance` config toggle (default: false)
- Add auto_advance step to discuss-phase workflow (spawns plan-phase)
- Add step 14 to plan-phase workflow (spawns execute-phase)
- Add auto_advance toggle to /gsd:settings

Chain stops gracefully on INCONCLUSIVE, CHECKPOINT, or verification
failures. No work lost — artifacts persist at each step.

Closes #541

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

commands/gsd/discuss-phase.md

@@ -1,7 +1,7 @@
 ---
 name: gsd:discuss-phase
 description: Gather phase context through adaptive questioning before planning
-argument-hint: "<phase>"
+argument-hint: "<phase> [--auto]"
 allowed-tools:
   - Read
   - Write
@@ -9,6 +9,7 @@ allowed-tools:
   - Glob
   - Grep
   - AskUserQuestion
+  - Task
 ---
 
 <objective>

commands/gsd/plan-phase.md

@@ -1,7 +1,7 @@
 ---
 name: gsd:plan-phase
 description: Create detailed execution plan for a phase (PLAN.md) with verification loop
-argument-hint: "[phase] [--research] [--skip-research] [--gaps] [--skip-verify]"
+argument-hint: "[phase] [--auto] [--research] [--skip-research] [--gaps] [--skip-verify]"
 agent: gsd-planner
 allowed-tools:
   - Read

get-shit-done/templates/config.json

@@ -4,7 +4,8 @@
   "workflow": {
     "research": true,
     "plan_check": true,
-    "verifier": true
+    "verifier": true,
+    "auto_advance": false
   },
   "planning": {
     "commit_docs": true,

get-shit-done/workflows/discuss-phase.md

@@ -410,6 +410,49 @@ node ~/.claude/get-shit-done/bin/gsd-tools.js commit "docs(state): record phase
 ```
 </step>
 
+<step name="auto_advance">
+Check for auto-advance trigger:
+
+1. Parse `--auto` flag from $ARGUMENTS
+2. Read `workflow.auto_advance` from config:
+   ```bash
+   AUTO_CFG=$(node ~/.claude/get-shit-done/bin/gsd-tools.js config get workflow.auto_advance 2>/dev/null || echo "false")
+   ```
+
+**If `--auto` flag present OR `AUTO_CFG` is true:**
+
+Display banner:
+```
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+ GSD ► AUTO-ADVANCING TO PLAN
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+Context captured. Spawning plan-phase...
+```
+
+Spawn plan-phase as Task:
+```
+Task(
+  prompt="Run /gsd:plan-phase ${PHASE} --auto",
+  subagent_type="general-purpose",
+  description="Plan Phase ${PHASE}"
+)
+```
+
+**Handle plan-phase return:**
+- **PLANNING COMPLETE** → Plan-phase handles chaining to execute-phase (via its own auto_advance step)
+- **PLANNING INCONCLUSIVE / CHECKPOINT** → Display result, stop chain:
+  ```
+  Auto-advance stopped: Planning needs input.
+
+  Review the output above and continue manually:
+  /gsd:plan-phase ${PHASE}
+  ```
+
+**If neither `--auto` nor config enabled:**
+Route to `confirm_creation` step (existing behavior — show manual next steps).
+</step>
+
 </process>
 
 <success_criteria>

get-shit-done/workflows/plan-phase.md

@@ -319,7 +319,59 @@ Offer: 1) Force proceed, 2) Provide guidance and retry, 3) Abandon
 
 ## 13. Present Final Status
 
-Route to `<offer_next>`.
+Route to `<offer_next>` OR `auto_advance` depending on flags/config.
+
+## 14. Auto-Advance Check
+
+Check for auto-advance trigger:
+
+1. Parse `--auto` flag from $ARGUMENTS
+2. Read `workflow.auto_advance` from config:
+   ```bash
+   AUTO_CFG=$(node ~/.claude/get-shit-done/bin/gsd-tools.js config get workflow.auto_advance 2>/dev/null || echo "false")
+   ```
+
+**If `--auto` flag present OR `AUTO_CFG` is true:**
+
+Display banner:
+```
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+ GSD ► AUTO-ADVANCING TO EXECUTE
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+Plans ready. Spawning execute-phase...
+```
+
+Spawn execute-phase as Task:
+```
+Task(
+  prompt="Run /gsd:execute-phase ${PHASE}",
+  subagent_type="general-purpose",
+  description="Execute Phase ${PHASE}"
+)
+```
+
+**Handle execute-phase return:**
+- **PHASE COMPLETE** → Display final summary:
+  ```
+  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+   GSD ► PHASE ${PHASE} COMPLETE ✓
+  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  Auto-advance pipeline finished.
+
+  Next: /gsd:discuss-phase ${NEXT_PHASE} --auto
+  ```
+- **GAPS FOUND / VERIFICATION FAILED** → Display result, stop chain:
+  ```
+  Auto-advance stopped: Execution needs review.
+
+  Review the output above and continue manually:
+  /gsd:execute-phase ${PHASE}
+  ```
+
+**If neither `--auto` nor config enabled:**
+Route to `<offer_next>` (existing behavior).
 
 </process>
 

get-shit-done/workflows/settings.md

@@ -74,6 +74,15 @@ AskUserQuestion([
       { label: "No", description: "Skip post-execution verification" }
     ]
   },
+  {
+    question: "Auto-advance pipeline? (discuss → plan → execute automatically)",
+    header: "Auto",
+    multiSelect: false,
+    options: [
+      { label: "No (Recommended)", description: "Manual /clear + paste between stages" },
+      { label: "Yes", description: "Chain stages via Task() subagents (same isolation)" }
+    ]
+  },
   {
     question: "Git branching strategy?",
     header: "Branching",
@@ -98,7 +107,8 @@ Merge new settings into existing config.json:
   "workflow": {
     "research": true/false,
     "plan_check": true/false,
-    "verifier": true/false
+    "verifier": true/false,
+    "auto_advance": true/false
   },
   "git": {
     "branching_strategy": "none" | "phase" | "milestone"
@@ -123,6 +133,7 @@ Display:
 | Plan Researcher      | {On/Off} |
 | Plan Checker         | {On/Off} |
 | Execution Verifier   | {On/Off} |
+| Auto-Advance         | {On/Off} |
 | Git Branching        | {None/Per Phase/Per Milestone} |
 
 These settings apply to future /gsd:plan-phase and /gsd:execute-phase runs.
@@ -139,7 +150,7 @@ Quick commands:
 
 <success_criteria>
 - [ ] Current config read
-- [ ] User presented with 5 settings (profile + 3 workflow toggles + git branching)
+- [ ] User presented with 6 settings (profile + 4 workflow toggles + git branching)
 - [ ] Config updated with model_profile, workflow, and git sections
 - [ ] Changes confirmed to user
 </success_criteria>