feat(bmm): add story-pipeline workflow for 60-70% token savings

src/modules/bmm/workflows/4-implementation/story-pipeline/batch-runner.sh

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+#!/bin/bash
+# ═══════════════════════════════════════════════════════════════════════════════
+# BMAD Story Pipeline - Batch Runner
+# Single-session execution using step-file architecture
+#
+# Token Efficiency: ~60-70% savings compared to separate Claude calls
+# ═══════════════════════════════════════════════════════════════════════════════
+
+set -e
+
+# ─────────────────────────────────────────────────────────────────────────────
+# CONFIGURATION
+# ─────────────────────────────────────────────────────────────────────────────
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../../../.." && pwd)"
+TIMESTAMP=$(date +%Y%m%d-%H%M%S)
+
+# Colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+CYAN='\033[0;36m'
+NC='\033[0m'
+
+# Defaults
+STORY_ID=""
+EPIC_NUM=""
+DRY_RUN=false
+RESUME=false
+VERBOSE=false
+
+# Directories
+LOG_DIR="$PROJECT_ROOT/logs/pipeline-batch"
+WORKFLOW_PATH="_bmad/bmm/workflows/4-implementation/story-pipeline"
+
+# ─────────────────────────────────────────────────────────────────────────────
+# USAGE
+# ─────────────────────────────────────────────────────────────────────────────
+usage() {
+    cat << EOF
+BMAD Story Pipeline - Batch Runner
+Single-session execution with step-file architecture
+
+Usage: $(basename "$0") --story-id <id> --epic-num <num> [OPTIONS]
+
+Required:
+  --story-id <id>    Story ID (e.g., '1-4')
+  --epic-num <num>   Epic number (e.g., 1)
+
+Options:
+  --resume           Resume from last checkpoint
+  --dry-run          Show what would be executed
+  --verbose          Show detailed output
+  --help             Show this help
+
+Examples:
+  # Run pipeline for story 1-4
+  $(basename "$0") --story-id 1-4 --epic-num 1
+
+  # Resume failed pipeline
+  $(basename "$0") --story-id 1-4 --epic-num 1 --resume
+
+Token Savings:
+  Traditional (6 calls): ~71K tokens
+  Step-file (1 session): ~25-35K tokens
+  Savings: 50-65%
+
+EOF
+    exit 1
+}
+
+# ─────────────────────────────────────────────────────────────────────────────
+# ARGUMENT PARSING
+# ─────────────────────────────────────────────────────────────────────────────
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        --story-id)
+            STORY_ID="$2"
+            shift 2
+            ;;
+        --epic-num)
+            EPIC_NUM="$2"
+            shift 2
+            ;;
+        --resume)
+            RESUME=true
+            shift
+            ;;
+        --dry-run)
+            DRY_RUN=true
+            shift
+            ;;
+        --verbose)
+            VERBOSE=true
+            shift
+            ;;
+        --help)
+            usage
+            ;;
+        *)
+            echo -e "${RED}Unknown option: $1${NC}"
+            usage
+            ;;
+    esac
+done
+
+# Validate required arguments
+if [[ -z "$STORY_ID" || -z "$EPIC_NUM" ]]; then
+    echo -e "${RED}Error: --story-id and --epic-num are required${NC}"
+    usage
+fi
+
+# ─────────────────────────────────────────────────────────────────────────────
+# SETUP
+# ─────────────────────────────────────────────────────────────────────────────
+mkdir -p "$LOG_DIR"
+LOG_FILE="$LOG_DIR/batch-$STORY_ID-$TIMESTAMP.log"
+
+echo -e "${CYAN}═══════════════════════════════════════════════════════════════${NC}"
+echo -e "${CYAN}  BMAD Story Pipeline - Batch Mode${NC}"
+echo -e "${CYAN}═══════════════════════════════════════════════════════════════${NC}"
+echo -e "${BLUE}Story:${NC} $STORY_ID"
+echo -e "${BLUE}Epic:${NC} $EPIC_NUM"
+echo -e "${BLUE}Mode:${NC} $([ "$RESUME" = true ] && echo 'Resume' || echo 'Fresh')"
+echo -e "${BLUE}Log:${NC} $LOG_FILE"
+echo ""
+
+# ─────────────────────────────────────────────────────────────────────────────
+# BUILD PROMPT
+# ─────────────────────────────────────────────────────────────────────────────
+
+if [[ "$RESUME" = true ]]; then
+    PROMPT=$(cat << EOF
+Execute BMAD Story Pipeline in BATCH mode - RESUME from checkpoint.
+
+WORKFLOW: $WORKFLOW_PATH/workflow.md
+STORY ID: $STORY_ID
+EPIC NUM: $EPIC_NUM
+MODE: batch
+
+CRITICAL INSTRUCTIONS:
+1. Load and read fully: $WORKFLOW_PATH/workflow.md
+2. This is RESUME mode - load state file first
+3. Follow step-file architecture EXACTLY
+4. Execute steps ONE AT A TIME
+5. AUTO-PROCEED through all steps (no menus in batch mode)
+6. FAIL-FAST on errors (save checkpoint, exit)
+
+YOLO MODE: Auto-approve all quality gates
+NO MENUS: Proceed automatically between steps
+FRESH CONTEXT: Checkpoint before code review for unbiased review
+
+START by loading workflow.md and then step-01b-resume.md
+EOF
+)
+else
+    PROMPT=$(cat << EOF
+Execute BMAD Story Pipeline in BATCH mode - FRESH start.
+
+WORKFLOW: $WORKFLOW_PATH/workflow.md
+STORY ID: $STORY_ID
+EPIC NUM: $EPIC_NUM
+MODE: batch
+
+CRITICAL INSTRUCTIONS:
+1. Load and read fully: $WORKFLOW_PATH/workflow.md
+2. This is a FRESH run - initialize new state
+3. Follow step-file architecture EXACTLY
+4. Execute steps ONE AT A TIME (never load multiple)
+5. AUTO-PROCEED through all steps (no menus in batch mode)
+6. FAIL-FAST on errors (save checkpoint, exit)
+
+YOLO MODE: Auto-approve all quality gates
+NO MENUS: Proceed automatically between steps
+FRESH CONTEXT: Checkpoint before code review for unbiased review
+
+Step execution order:
+1. step-01-init.md - Initialize, cache documents
+2. step-02-create-story.md - Create story (SM role)
+3. step-03-validate-story.md - Validate story (SM role)
+4. step-04-atdd.md - Generate tests (TEA role)
+5. step-05-implement.md - Implement (DEV role)
+6. step-06-code-review.md - Review (DEV role, adversarial)
+7. step-07-complete.md - Complete (SM role)
+8. step-08-summary.md - Generate audit
+
+START by loading workflow.md and then step-01-init.md
+EOF
+)
+fi
+
+# ─────────────────────────────────────────────────────────────────────────────
+# EXECUTE
+# ─────────────────────────────────────────────────────────────────────────────
+
+if [[ "$DRY_RUN" = true ]]; then
+    echo -e "${YELLOW}[DRY-RUN] Would execute single Claude session with:${NC}"
+    echo ""
+    echo "$PROMPT"
+    echo ""
+    echo -e "${YELLOW}[DRY-RUN] Allowed tools: *, MCP extensions${NC}"
+    exit 0
+fi
+
+echo -e "${GREEN}Starting single-session pipeline execution...${NC}"
+echo -e "${YELLOW}This replaces 6 separate Claude calls with 1 session${NC}"
+echo ""
+
+cd "$PROJECT_ROOT/src"
+
+# Single Claude session executing all steps
+claude -p "$PROMPT" \
+    --dangerously-skip-permissions \
+    --allowedTools "*,mcp__exa__web_search_exa,mcp__exa__get_code_context_exa,mcp__exa__crawling_exa,mcp__supabase__list_tables,mcp__supabase__execute_sql,mcp__supabase__apply_migration,mcp__supabase__list_migrations,mcp__supabase__generate_typescript_types,mcp__supabase__get_logs,mcp__supabase__get_advisors" \
+    2>&1 | tee "$LOG_FILE"
+
+# ─────────────────────────────────────────────────────────────────────────────
+# COMPLETION CHECK
+# ─────────────────────────────────────────────────────────────────────────────
+
+echo ""
+echo -e "${CYAN}═══════════════════════════════════════════════════════════════${NC}"
+
+# Check for success indicators in log
+if grep -qi "Pipeline complete\|Story.*is ready\|step-08-summary.*completed" "$LOG_FILE"; then
+    echo -e "${GREEN}✅ Pipeline completed successfully${NC}"
+
+    # Extract metrics if available
+    if grep -qi "Token Efficiency" "$LOG_FILE"; then
+        echo ""
+        echo -e "${CYAN}Token Efficiency:${NC}"
+        grep -A5 "Token Efficiency" "$LOG_FILE" | head -6
+    fi
+else
+    echo -e "${YELLOW}⚠️ Pipeline may have completed with issues${NC}"
+    echo -e "${YELLOW}   Check log: $LOG_FILE${NC}"
+
+    # Check for specific failure indicators
+    if grep -qi "permission\|can't write\|access denied" "$LOG_FILE"; then
+        echo -e "${RED}   Found permission errors in log${NC}"
+    fi
+    if grep -qi "HALT\|FAIL\|ERROR" "$LOG_FILE"; then
+        echo -e "${RED}   Found error indicators in log${NC}"
+    fi
+fi
+
+echo ""
+echo -e "${BLUE}Log file:${NC} $LOG_FILE"
+echo -e "${CYAN}═══════════════════════════════════════════════════════════════${NC}"

src/modules/bmm/workflows/4-implementation/story-pipeline/checklists/atdd.md

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+# ATDD Checklist
+
+Use this checklist for test generation in Step 4.
+Tests are written BEFORE implementation (RED phase).
+
+## Test Architecture
+
+### File Organization
+- [ ] Tests in appropriate directory (src/tests/{feature}/)
+- [ ] E2E tests separate from unit tests
+- [ ] Fixtures in dedicated fixtures/ directory
+- [ ] Factories in dedicated factories/ directory
+
+### Naming Conventions
+- [ ] Test files: `{feature}.test.ts` or `{feature}.spec.ts`
+- [ ] Factory files: `{entity}.factory.ts`
+- [ ] Fixture files: `{feature}.fixture.ts`
+- [ ] Descriptive test names matching AC
+
+## Test Coverage
+
+For EACH acceptance criterion:
+- [ ] At least one test exists
+- [ ] Happy path tested
+- [ ] Error path tested
+- [ ] Edge cases from validation covered
+
+## Test Structure
+
+### Given/When/Then Pattern
+```typescript
+test("Given X, When Y, Then Z", async () => {
+  // Arrange (Given)
+  // Act (When)
+  // Assert (Then)
+});
+```
+
+- [ ] Each section clearly separated
+- [ ] Arrange sets up realistic state
+- [ ] Act performs single action
+- [ ] Assert checks specific outcome
+
+### Assertions
+- [ ] Specific assertions (not just "toBeTruthy")
+- [ ] Error messages are helpful
+- [ ] Multiple assertions when appropriate
+- [ ] No flaky timing assertions
+
+## Data Management
+
+### Factories
+- [ ] Use faker for realistic data
+- [ ] Support partial overrides
+- [ ] No hardcoded values
+- [ ] Proper TypeScript types
+
+```typescript
+// Good
+const user = createUser({ email: "[email protected]" });
+
+// Bad
+const user = { id: "123", email: "[email protected]", name: "Test" };
+```
+
+### Fixtures
+- [ ] Auto-cleanup after tests
+- [ ] Reusable across tests
+- [ ] Proper TypeScript types
+- [ ] No shared mutable state
+
+### data-testid Attributes
+- [ ] Document all required data-testids
+- [ ] Naming convention: `{feature}-{element}`
+- [ ] Unique within component
+- [ ] Stable (not based on dynamic content)
+
+## Test Levels
+
+### E2E Tests (Playwright)
+- [ ] Full user flows
+- [ ] Network interception before navigation
+- [ ] Wait for proper selectors (not timeouts)
+- [ ] Screenshot on failure
+
+### API Tests
+- [ ] Direct server action calls
+- [ ] Mock external services
+- [ ] Test error responses
+- [ ] Verify Result type usage
+
+### Component Tests
+- [ ] Isolated component rendering
+- [ ] Props variations
+- [ ] Event handling
+- [ ] Accessibility (when applicable)
+
+### Unit Tests
+- [ ] Pure function testing
+- [ ] Edge cases
+- [ ] Error conditions
+- [ ] Type checking
+
+## RED Phase Verification
+
+Before proceeding:
+- [ ] Run all tests: `npm test -- --run`
+- [ ] ALL tests FAIL (expected - nothing implemented)
+- [ ] Failure reasons are clear (not cryptic errors)
+- [ ] Test structure is correct
+
+## ATDD Checklist Document
+
+Create `atdd-checklist-{story_id}.md` with:
+- [ ] List of test files created
+- [ ] List of factories created
+- [ ] List of fixtures created
+- [ ] Required data-testid attributes table
+- [ ] Implementation requirements for DEV
+- [ ] Test status (all FAILING)
+
+## Quality Gate
+
+Ready for implementation when:
+- [ ] Test for every AC
+- [ ] All tests FAIL (red phase)
+- [ ] Factories use faker
+- [ ] Fixtures have cleanup
+- [ ] data-testids documented
+- [ ] ATDD checklist complete