bmad-epic-pipeline-worktree

name	bmad-epic-pipeline-worktree
description	Deliver entire Epic using configurable pipeline in isolated worktrees
argument-hint	<epic-number> e.g., 1 or 2 (optional, auto-selects smallest epic with incomplete stories if omitted)

BMAD Epic Pipeline (Worktree Edition)

Deliver all incomplete user stories in Epic {ARGUMENT} using configurable pipeline, each story developed in isolated worktree and merged only after tests pass.

Pre-step: Determine Epic Number

If no epic number is provided ({ARGUMENT} is empty):

1. Read _bmad-output/implementation-artifacts/sprint-status.yaml (or docs/sprint/sprint-status.yaml)
2. Find all stories with status not done (format: X-Y-story-name)
3. Extract Epic numbers X from these stories
4. Select the smallest Epic number as {ARGUMENT}
5. Output:

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📌 Auto-selected Epic: {ARGUMENT} (has incomplete stories)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Example:

• Status file has 3-2-llm-prompt-template: backlog, 3-3-xxx: in-progress, 4-1-xxx: done
• Incomplete Epics: 3
• Auto-select Epic: 3

---

Difference from bmad-epic-worktree

Feature	bmad-epic-worktree	bmad-epic-pipeline-worktree
Story delivery	bmad-story-worktree	bmad-story-pipeline-worktree
Workflow config	Fixed 8-step flow	Configurable via workflow-steps.md
Customization	Limited	Full pipeline customization
Safety level	High	High

---

Execution Strategy

1. Read all incomplete stories under the Epic
2. Sort by Story number ascending
3. Execute /bmad-story-pipeline-worktree for each story sequentially
4. Only start next story after previous one completes
5. If any story fails, stop and preserve current state

---

Execution Flow

Step 1: Collect Epic Story List

Read sprint-status.yaml, collect all incomplete stories under specified Epic:

Task(
  subagent_type: general-purpose,
  description: "Collect Epic {ARGUMENT} story list",
  prompt: "Read _bmad-output/implementation-artifacts/sprint-status.yaml (or docs/sprint/sprint-status.yaml), collect all stories for Epic {ARGUMENT}:

1. Filter entries with key format '{ARGUMENT}-Y-story-name'
2. Keep only stories with status not 'done'
3. Sort by Story number Y ascending
4. Return story list with format:
   - Story number: 'X.Y', Story name, Current status
   - Number of incomplete stories

If no incomplete stories found, return 'Epic {ARGUMENT} has no incomplete stories'"
)

Progress output:

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📋 Epic {ARGUMENT} - Story List

   Story  | Name                    | Status
   -------|-------------------------|--------
   {ARGUMENT}.1 | {story-name-1}     | backlog
   {ARGUMENT}.3 | {story-name-3}     | in-progress
   ...

   📊 Total: {N} incomplete stories
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

---

Step 2~N: Deliver Stories Sequentially

For each incomplete story, execute in order:

For story {STORY_NUM} (i-th of N total):

Execute /bmad-story-pipeline-worktree {STORY_NUM}

Wait for completion before continuing to next story

Each story delivery progress:

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔄 Story [{i}/{N}]: {STORY_NUM}
   📝 Name: {story-name}
   ⏳ Executing configurable pipeline...
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

[... Execute bmad-story-pipeline-worktree phases ...]
   Phase 1: Create Worktree
   Phase 2: Configurable Pipeline (from workflow-steps.md)
   Phase 3: Merge Branch
   Phase 4: Update Status

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✅ Story [{i}/{N}]: {STORY_NUM} Complete
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

If any story fails:

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
❌ Story [{i}/{N}]: {STORY_NUM} Failed
   ⚠️ Stopping subsequent story delivery
   📁 Please handle manually before continuing
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

---

Final Delivery Report

All complete:

╔════════════════════════════════════════════════════════╗
║         🎉 BMAD Epic Pipeline Complete!                ║
╠════════════════════════════════════════════════════════╣
║  Epic: {ARGUMENT}                                      ║
║                                                        ║
║  ✅ Story 1: {story-1} - done                          ║
║  ✅ Story 2: {story-2} - done                          ║
║  ...                                                   ║
║  ✅ Story N: {story-N} - done                          ║
║                                                        ║
║  📊 Total: {N}/{N} stories completed                   ║
║  🎯 Epic status: done                                  ║
╚════════════════════════════════════════════════════════╝

Partial completion (has failures):

╔════════════════════════════════════════════════════════╗
║      ⚠️ BMAD Epic Pipeline - Partial Completion        ║
╠════════════════════════════════════════════════════════╣
║  Epic: {ARGUMENT}                                      ║
║                                                        ║
║  ✅ Story 1: {story-1} - done                          ║
║  ✅ Story 2: {story-2} - done                          ║
║  ❌ Story 3: {story-3} - failed                        ║
║  ⏸️ Story 4: {story-4} - not started                   ║
║  ...                                                   ║
║                                                        ║
║  📊 Progress: {completed}/{total} stories completed    ║
║  📁 Failed story: {failed-story}                       ║
║  💡 Handle failed story then re-run to continue        ║
╚════════════════════════════════════════════════════════╝

---

Error Handling

If any story delivery fails:

1. Stop subsequent story delivery
2. Preserve failed story's worktree (if any)
3. Output failure information and completed progress
4. Prompt user to handle manually

Resume delivery:

# 1. Manually fix failed story
cd {WORKTREE_PATH}
# Fix issues...
git add . && git commit -m "fix: resolve issues"
cd {ORIGINAL_REPO_PATH}
git merge feature/story-{STORY_NUM}
git worktree remove {WORKTREE_PATH}

# 2. Re-run epic delivery, will auto-skip completed stories
/bmad-epic-pipeline-worktree {ARGUMENT}

---

Configuration

Pipeline workflow uses bmad-story-pipeline-worktree's configuration.

To customize the pipeline, edit: bmad-story-pipeline-worktree/references/workflow-steps.md

Changes supported:

• Add/remove steps
• Modify step commands
• Reorder steps
• Change descriptions

---

Relationship with bmad-story-pipeline-worktree

• bmad-epic-pipeline-worktree is the batch version of bmad-story-pipeline-worktree
• Internally loops to call /bmad-story-pipeline-worktree {story-num}
• Each story has independent worktree, independent pipeline, independent merge
• Guarantees sequential execution, next starts only after previous completes
• Each story completion auto-updates: sprint-status.yaml + story design document
• Uses configurable workflow from workflow-steps.md