Plan Phase

---
name: gsd:plan-phase
description: Create detailed execution plan for a phase (PLAN.md) with verification loop
argument-hint: "[phase] [--research] [--skip-research] [--gaps] [--skip-verify]"
agent: gsd-planner
allowed-tools:
  - Read
  - Write
  - Bash
  - Glob
  - Grep
  - Task
  - WebFetch
  - mcp__context7__*
  - mcp__Ref__*
---

<execution_context>
@./.claude/get-shit-done/references/ui-brand.md
</execution_context>

<objective>
Create executable phase prompts (PLAN.md files) for a roadmap phase with integrated research and verification.

**Default flow:** Research (if needed) → Plan → Verify → Done

**Orchestrator role:** Parse arguments, validate phase, research domain (unless skipped or exists), spawn gsd-planner agent, verify plans with gsd-plan-checker, iterate until plans pass or max iterations reached, present results.

**Why subagents:** Research and planning burn context fast. Verification uses fresh context. User sees the flow between agents in main context.
</objective>

<context>
Phase number: $ARGUMENTS (optional - auto-detects next unplanned phase if not provided)

**Flags:**
- `--research` — Force re-research even if RESEARCH.md exists
- `--skip-research` — Skip research entirely, go straight to planning
- `--gaps` — Gap closure mode (reads VERIFICATION.md, skips research)
- `--skip-verify` — Skip planner → checker verification loop

Normalize phase input in step 2 before any directory lookups.
</context>

<process>

## 1. Validate Environment

```bash
ls .planning/ 2>/dev/null

If not found: Error - user should run /gsd:new-project first.

2. Parse and Normalize Arguments

Extract from $ARGUMENTS:

• Phase number (integer or decimal like 2.1)
• --research flag to force re-research
• --skip-research flag to skip research
• --gaps flag for gap closure mode
• --skip-verify flag to bypass verification loop

If no phase number: Detect next unplanned phase from roadmap.

Normalize phase to zero-padded format:

# Normalize phase number (8 → 08, but preserve decimals like 2.1 → 02.1)
if [[ "$PHASE" =~ ^[0-9]+$ ]]; then
  PHASE=$(printf "%02d" "$PHASE")
elif [[ "$PHASE" =~ ^([0-9]+)\.([0-9]+)$ ]]; then
  PHASE=$(printf "%02d.%s" "${BASH_REMATCH[1]}" "${BASH_REMATCH[2]}")
fi

Check for existing research and plans:

ls .planning/phases/${PHASE}-*/*-RESEARCH.md 2>/dev/null
ls .planning/phases/${PHASE}-*/*-PLAN.md 2>/dev/null

3. Validate Phase

grep -A5 "Phase ${PHASE}:" .planning/ROADMAP.md 2>/dev/null

If not found: Error with available phases. If found: Extract phase number, name, description.

4. Ensure Phase Directory Exists

# PHASE is already normalized (08, 02.1, etc.) from step 2
PHASE_DIR=$(ls -d .planning/phases/${PHASE}-* 2>/dev/null | head -1)
if [ -z "$PHASE_DIR" ]; then
  # Create phase directory from roadmap name
  PHASE_NAME=$(grep "Phase ${PHASE}:" .planning/ROADMAP.md | sed 's/.*Phase [0-9]*: //' | tr '[:upper:]' '[:lower:]' | tr ' ' '-')
  mkdir -p ".planning/phases/${PHASE}-${PHASE_NAME}"
  PHASE_DIR=".planning/phases/${PHASE}-${PHASE_NAME}"
fi

5. Handle Research

If --gaps flag: Skip research (gap closure uses VERIFICATION.md instead).

If --skip-research flag: Skip to step 6.

Otherwise:

Check for existing research:

ls "${PHASE_DIR}"/*-RESEARCH.md 2>/dev/null

If RESEARCH.md exists AND --research flag NOT set:

• Display: Using existing research: ${PHASE_DIR}/${PHASE}-RESEARCH.md
• Skip to step 6

If RESEARCH.md missing OR --research flag set:

Display stage banner:

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 GSD ► RESEARCHING PHASE {X}
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

◆ Spawning researcher...

Proceed to spawn researcher

Spawn gsd-phase-researcher

Gather context for research prompt:

# Get phase description from roadmap
PHASE_DESC=$(grep -A3 "Phase ${PHASE}:" .planning/ROADMAP.md)

# Get requirements if they exist
REQUIREMENTS=$(cat .planning/REQUIREMENTS.md 2>/dev/null | grep -A100 "## Requirements" | head -50)

# Get prior decisions from STATE.md
DECISIONS=$(grep -A20 "### Decisions Made" .planning/STATE.md 2>/dev/null)

# Get phase context if exists
PHASE_CONTEXT=$(cat "${PHASE_DIR}/${PHASE}-CONTEXT.md" 2>/dev/null)

Fill research prompt and spawn:

<objective>
Research how to implement Phase {phase_number}: {phase_name}

Answer: "What do I need to know to PLAN this phase well?"
</objective>

<context>
**Phase description:**
{phase_description}

**Requirements (if any):**
{requirements}

**Prior decisions:**
{decisions}

**Phase context (if any):**
{phase_context}
</context>

<output>
Write research findings to: {phase_dir}/{phase}-RESEARCH.md
</output>

Task(
  prompt=research_prompt,
  subagent_type="gsd-phase-researcher",
  description="Research Phase {phase}"
)

Handle Researcher Return

## RESEARCH COMPLETE:

• Display: Research complete. Proceeding to planning...
• Continue to step 6

## RESEARCH BLOCKED:

• Display blocker information
• Offer: 1) Provide more context, 2) Skip research and plan anyway, 3) Abort
• Wait for user response

6. Check Existing Plans

ls "${PHASE_DIR}"/*-PLAN.md 2>/dev/null

If exists: Offer: 1) Continue planning (add more plans), 2) View existing, 3) Replan from scratch. Wait for response.

7. Gather Context Paths

Identify context files for the planner agent:

# Required
STATE=.planning/STATE.md
ROADMAP=.planning/ROADMAP.md
REQUIREMENTS=.planning/REQUIREMENTS.md

# Optional (created by earlier steps or commands)
CONTEXT="${PHASE_DIR}/${PHASE}-CONTEXT.md"
RESEARCH="${PHASE_DIR}/${PHASE}-RESEARCH.md"
VERIFICATION="${PHASE_DIR}/${PHASE}-VERIFICATION.md"
UAT="${PHASE_DIR}/${PHASE}-UAT.md"

8. Spawn gsd-planner Agent

Display stage banner:

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 GSD ► PLANNING PHASE {X}
━━━━━━━━━━━━━━━━━━━━━━━