Writing Flutter LG Implementation Plans

Announce at start: "I'm using lg-flutter-plan-writer to create your implementation plan."

CORE RULES

Rule 1: Phase Order is Fixed

Init → Brainstorm → Plan → Execute → Review → Quiz

Skipping any phase is FORBIDDEN.

Rule 2: Transition Requires Validation

Before moving to Execute phase:

1. •Plan MUST be complete
2. •Student MUST pass Skeptical Mentor validation
3. •Both conditions MUST be true

Rule 3: Plans Must Reference Existing Code

Every plan MUST identify:

• •Existing components to reuse
• •Existing interfaces to implement
• •Why new code is needed (if any)

Plan Document Structure

Create: docs/plans/YYYY-MM-DD-<feature>-plan.md

# [Feature] Implementation Plan

**Goal**: [One sentence]
**Layers Affected**: domain / data / ui

---

## Reuse Check
**Existing components to use:**
- [List existing classes/methods]

**New components needed:**
- [List new classes with justification]

---

## Checklist
- [ ] Task 1: [title]
- [ ] Task 2: [title]
...

---

## Tasks
[Details below]

Task Structure

Each task:

### Task N: [Name]

**Files:**
- Reuse: [existing files]
- Create: [new files]
- Test: [test file]

**What to Build:**
[Specific implementation details]

**Test:**
[What the test verifies]

**Verification:**
1. flutter analyze — zero warnings
2. flutter test [path] — pass

Validation Before Execution

After plan is complete:

1. •

   Self-Check:

   • •Are all SOLID principles considered?
   • •Is DRY followed (no duplicated logic)?
   • •Are existing components reused?
2. •

   Skeptical Mentor Validation:

   • •Ask ONE architecture question
   • •Correct answer → proceed to Execute
   • •Wrong answer → return to Brainstorm

Handoff

Checklist before handoff:

• • Plan document complete
• • Reuse check complete
• • Skeptical Mentor passed

Then ask: "Plan ready. Shall we start execution?"

Invoke lg-flutter-exec