name: whiteboarding
description: "Brainstorm and plan features through codebase search, technology research, and 2-3 approach comparison before producing implementation-ready plans. Use when starting features, designing solutions, or planning complex work. Triggers on: whiteboard, let's plan, brainstorm, design this, figure out how to build. Save plans to docs/plans/ for execution via /code-foundations:building."

Skill: whiteboarding

Brainstorm → Design → Save → Handoff

Quick Reference

Key change: Phases 1 and 2 now SEARCH before asking/proposing. No relying on user to know patterns.

Crisis Invariants - NEVER SKIP

Phase 1: UNDERSTAND (Discovery + Research)

Step 1a: Pattern Discovery (MANDATORY - Do First)

Before asking ANY questions, search the codebase:

SEARCH FOR:
1. Similar features/functionality (grep for keywords)
2. Same directory/module patterns (read nearby files)
3. Related components (how do similar things work?)
4. Naming conventions (what patterns exist?)

Output: Pattern Summary

## Existing Patterns Found
- [pattern 1]: [where found, how it works]
- [pattern 2]: [where found, how it works]

## Conventions to Follow
- Naming: [observed pattern]
- Structure: [observed pattern]
- Error handling: [observed pattern]

## Similar Implementations
- [file]: [what it does, relevance]

If no patterns found: State "No existing patterns found for [topic]. This will establish a new pattern."

See: pattern-reuse-gate.md

Step 1b: Adaptive Questioning

After pattern discovery, classify complexity:

State classification: "This seems [simple/medium/complex]. Based on pattern discovery, I'll ask [N] questions."

Question Sequence (Ask ONE at a time)

Simple (2-3 questions):
1. What specific outcome do you want?
2. What constraints should I know about?
3. What does "done" look like?

Medium (add these):
4. Who/what will use this?
5. What could go wrong?

Complex (add these):
6. What other systems does this touch?
7. What's the rollback plan if it fails?
8. What's the testing strategy?

NOTE: Questions about "existing patterns" removed - we searched instead of asking.

Question Format

Use multiple-choice when possible:

Which authentication approach fits best?
- [ ] JWT tokens (stateless, scalable)
- [ ] Session cookies (simpler, server-state)
- [ ] OAuth2 (if external providers needed)
- [ ] Other (describe)

IMPORTANT: Wait for answer before next question. No question batching.

Output: Problem Statement

After questions, summarize:

## Problem Statement
[1-2 sentences describing what we're building]

## Constraints
- [constraint 1]
- [constraint 2]

## Success Criteria
- [criterion 1]
- [criterion 2]

Get user confirmation: "Does this capture what you want?"

Phase 2: EXPLORE (Research + Approaches)

Step 2a: Technology Research (Before Proposing)

Before proposing approaches, gather data:

Codebase Research

SEARCH FOR:
1. How similar problems are solved in this codebase
2. What libraries/patterns are already in use
3. What the codebase is NOT using (intentional omissions?)

Web Research (When technology choice is involved)

Use WebSearch/WebFetch when:
- Comparing libraries/frameworks
- Evaluating technology trade-offs
- Checking current best practices (your knowledge may be outdated)

SEARCH FOR:
1. "[technology A] vs [technology B] [current year]"
2. "[problem domain] best practices [current year]"
3. "[framework] [specific feature] implementation"

Output: Research Summary

## Codebase Findings
- Already using: [libraries, patterns]
- Similar solutions: [where, how]

## Web Research (if applicable)
- [Technology A]: [pros, cons, current status]
- [Technology B]: [pros, cons, current status]
- Recommendation: [based on research]

Step 2b: Generate Alternatives

You MUST present 2-3 approaches before proceeding.

CRITICAL: Approaches must be STRUCTURALLY different (different technology, pattern, or architecture). Variations of the same approach do NOT count:
- ❌ "JWT with refresh tokens" vs "JWT without refresh tokens" = same approach
- ✅ "JWT tokens" vs "Session cookies" vs "OAuth2" = different approaches

Approaches must be informed by research. Don't propose technologies you didn't research.

If user mentioned a solution in their initial request (e.g., "I'm thinking JWT"), this is exploratory input, NOT a decision. Still present 2-3 structurally different alternatives, informed by research.

Presentation Format

## Approach A: [Name] (Recommended)
**Idea:** [1-2 sentences]
**Pros:** [list]
**Cons:** [list]
**Effort:** [relative estimate]

## Approach B: [Name]
**Idea:** [1-2 sentences]
**Pros:** [list]
**Cons:** [list]
**Effort:** [relative estimate]

## Approach C: [Name] (if applicable)
...

Decision

Ask: "Which approach do you prefer, or should I elaborate on any?"

Record chosen approach and rationale:

## Chosen Approach: [Name]
**Rationale:** [why this over others]

Phase 3: DETAIL (Implementation-Ready Plan)

Break into Sections (200-300 words each)

For each section:
1. Present the section
2. Wait for user confirmation
3. Proceed to next section

Section Template

### Section N: [Name]

**Goal:** [what this section accomplishes]

**Files to create/modify:**
- `path/to/file.ts` - [what changes]
- `path/to/other.ts` - [what changes]

**Implementation details:**
- [specific function/class/pattern]
- [key decisions]
- [edge cases to handle]

**Dependencies:** [what must be done first]

YAGNI Gate

Before each section, ask:
- Is this section actually needed?
- Could we ship without it?
- Are we building for hypothetical future needs?

If answer is "not needed now" → Remove from plan.

Phase 4: VALIDATE (Confirmation Loop)

Test Coverage Question (MANDATORY)

Before finalizing the plan, ask about test coverage:

How much test coverage do you want for this implementation?

1. 100% coverage (Recommended)
   Unit tests for all new code + integration tests for critical paths

2. Backend only
   Tests for server-side/API changes only

3. Backend + frontend
   Tests for both server and client layers

4. None
   Skip tests (not recommended - technical debt)

5. Ask at each phase
   Decide test scope when building each phase

Record the answer in the plan file under ## Test Coverage.

Inform building: This choice affects POST-GATE behavior - reviewers will check for tests matching the chosen coverage level.

Full Plan Review

Present complete plan structure:

# Plan: [Topic]

## Sections
1. [Section 1 name] - [1 sentence]
2. [Section 2 name] - [1 sentence]
3. ...

## Test Plan
- [test 1]
- [test 2]

## Questions/Concerns
- [any remaining uncertainties]

Ask: "Does this plan look complete? Any sections to add, remove, or modify?"

Phase 5: SAVE (Write Plan File)

File Location

docs/plans/YYYY-MM-DD-<topic-slug>.md

Plan File Schema

# Plan: [Topic]

**Created:** YYYY-MM-DD
**Status:** ready

---

## Context

[Problem statement from Phase 1]

## Constraints

- [constraint 1]
- [constraint 2]

## Chosen Approach

**[Approach name]**

[Rationale from Phase 2]

---

## Implementation Checklist

### Phase 1: [Name]
- [ ] [Specific task with file path]
- [ ] [Specific task with file path]

**Files:**
- `path/to/file.ts`

**Details:**
[Implementation specifics]

---

### Phase 2: [Name]
...

---

## Test Coverage

**Level:** [100% / Backend only / Backend + frontend / None / Per-phase]

## Test Plan

- [ ] Unit: [specific tests]
- [ ] Integration: [specific tests]
- [ ] Manual: [verification steps]

---

## Notes

- [edge cases]
- [gotchas]
- [decisions made during planning]

---

## Execution Log

_To be filled during /code-foundations:building_

Save Command

mkdir -p docs/plans
# Write plan file

Phase 6: HANDOFF

Ask User How to Proceed

After saving the plan, use AskUserQuestion with these options:

Question: "Plan saved to docs/plans/YYYY-MM-DD-.md. How would you like to proceed?"

Options:
1. Clear conversation and build (Recommended) - Fresh context for better execution
2. Tell me what to do - Get step-by-step instructions to execute manually

If user selects option 1:
Execute /clear command, then immediately run /code-foundations:building docs/plans/YYYY-MM-DD-<topic>.md

If user selects option 2:
Provide numbered steps the user can follow to implement the plan manually

Anti-Rationalization Table

Pressure Testing Scenarios

Scenario 1: User Wants to Skip Planning

Situation: User says "just build it" or "we don't need a plan."

Response: "I can build without planning, but past experience shows:
- Plans catch issues before code exists
- Plan files enable context refresh for better execution
- Checklist tracking reduces forgotten edge cases

How about a quick plan (3-4 questions, 5 minutes)? Or should I proceed without?"

Scenario 2: Vague Requirements

Situation: User gives unclear or incomplete requirements.

Response: Ask clarifying questions ONE AT A TIME. Do NOT guess or assume. Each question should narrow scope until requirements are concrete.

Scenario 3: User Rejects All Approaches

Situation: User doesn't like any of the 2-3 approaches presented.

Response: "What's missing from these approaches? I'll generate alternatives that address [specific concern]."

Chaining

• RECEIVES FROM: User request, feature description, user story
• CHAINS TO: building (via saved plan file)
• RELATED: oberplan, aposd-designing-deep-modules, cc-construction-prerequisites