Plan to Epic

Convert an implementation plan into a Beads epic with properly scoped, dependency-linked tasks.

Arguments

• First argument: path to implementation plan (required)
• --design <path>: path to design doc (optional, for architecture context)
• --epic-title <title>: override epic title (optional)

Process

Phase 0: Read & Parse

1. Read the implementation plan at the given path
2. If --design provided, read the design doc too
3. Extract: Goal, Architecture, Tech Stack from the plan header
4. Identify all Tasks (look for ### Task N: headings)

Phase 1: Scope Validation

For each task, apply the one-sentence scoping test:

"Can you describe this task in one sentence without using 'and' to join unrelated capabilities?"

If a task fails this test, split it into multiple tasks.

Phase 2: Three-Field Separation

For each task, produce three fields:

Phase 3: Dependency Inference

Detect dependencies automatically:

1. File overlap: If Task B modifies a file that Task A creates -> B depends on A
2. Explicit references: Scan for "after Task N" or "requires Task N" patterns
3. Phase ordering: Tasks in later plan sections depend on earlier sections' tasks

Phase 4: Create Beads Epic

# Create the epic
bd create "<Goal from plan header>" --type epic -p 1

# For each task (example):
bd create "<Task title>" --parent <epic-id> -d "<Description field>"

# Set dependencies
bd dep add <child-id> <parent-id>

Phase 4.5: DAG Cycle Detection

After creating all tasks and dependencies, validate the dependency graph has no cycles:

# Verify no circular dependencies
bd dep cycles 2>&1

If a cycle is detected:

1. Identify the offending dependency edge
2. Remove the circular dependency by restructuring task order
3. Log a warning: "Removed circular dependency: -> "
4. Re-verify until clean

If bd dep check is not available, manually inspect by traversing the dependency chain for each task (max depth 10). If a task is encountered twice, there is a cycle.

Phase 5: Summary

Output a table:

Epic: <id> -- <title>
Tasks: <count>
Dependencies: <count edges>

Task Graph:
  bd-XX: Setup (no deps)
  bd-YY: Implementation (blocked by bd-XX)
  bd-ZZ: Testing (blocked by bd-YY)

Tips

• Use bd create ... -d "$(cat <<'EOF' ... EOF)" for multi-line descriptions
• Keep descriptions self-contained -- a subagent should be able to execute without the original plan
• Embed completion criteria in every task description
• Include verification commands (test, lint, typecheck) in every task