Ultraplan Phase

Ultraplan Phase Workflow [BETA]

Offload GSD's plan phase to Claude Code's ultraplan cloud infrastructure.

⚠ BETA feature. Ultraplan is in research preview and may change. This workflow is intentionally isolated from /gsd-plan-phase so upstream changes to ultraplan cannot affect the core planning pipeline.

Display the stage banner:

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 GSD ► ULTRAPLAN PHASE  ⚠ BETA
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Ultraplan is in research preview (Claude Code v2.1.91+).
Use /gsd-plan-phase for stable local planning.

Check that the session is running inside Claude Code:

echo "$CLAUDE_CODE_VERSION"

If the output is empty or unset, display the following error and exit:

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║  RUNTIME ERROR                                               ║
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/gsd-ultraplan-phase requires Claude Code.
ultraplan is not available in this runtime.

Use /gsd-plan-phase for local planning instead.

Parse phase number from $ARGUMENTS. If no phase number is provided, detect the next unplanned phase from the roadmap (same logic as /gsd-plan-phase).

Load Open-workspace phase context:

INIT=$(gsd-sdk query init.plan-phase "$PHASE")
if [[ "$INIT" == @file:* ]]; then INIT=$(cat "${INIT#@file:}"); fi

Parse JSON for: phase_found, phase_number, phase_name, phase_slug, padded_phase, phase_dir, roadmap_path, requirements_path, research_path, planning_exists.

If planning_exists is false: Error and exit:

No .planning directory found. Initialize the project first:

/gsd-new-project

If phase_found is false: Error with the phase number provided and exit.

Display detected phase:

Phase {N}: {phase name}

Build the ultraplan prompt from GSD context.

1. Read the phase scope from ROADMAP.md — extract the goal, deliverables, and scope for the target phase.

2. Read REQUIREMENTS.md if it exists (requirements_path is not null) — extract a concise summary (key requirements relevant to this phase, not the full document).

3. Read RESEARCH.md if it exists (research_path is not null) — extract a concise summary of technical findings. Including this reduces redundant cloud research.

Construct the prompt:

Plan phase {phase_number}: {phase_name}

## Phase Scope (from ROADMAP.md)

{phase scope block extracted from ROADMAP.md}

## Requirements Context

{requirements summary, or "No REQUIREMENTS.md found — infer from phase scope."}

## Existing Research

{research summary, or "No RESEARCH.md found — research from scratch."}

## Output Format

Produce a GSD PLAN.md with the following YAML frontmatter:

---
phase: "{padded_phase}-{phase_slug}"
plan: "{padded_phase}-01"
type: "feature"
wave: 1
depends_on: []
files_modified: []
autonomous: true
must_haves:
  truths: []
  artifacts: []
---

Then a ## Plan section with numbered tasks. Each task should have:
- A clear imperative title
- Files to create or modify
- Specific implementation steps

Keep the plan focused and executable.

Display the return-path instructions before triggering ultraplan so they are visible in the terminal scroll-back after ultraplan launches:

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 WHEN THE PLAN IS READY — WHAT TO DO
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When ◆ ultraplan ready appears in your terminal:

  1. Open the session link in your browser
  2. Review the plan — use inline comments and emoji reactions to give feedback
  3. Ask Claude to revise until you're satisfied
  4. Click "Approve plan and teleport back to terminal"
  5. At the terminal dialog, choose Cancel  ← saves the plan to a file
  6. Note the file path Claude prints
  7. Run: /gsd-import --from <the file path>

/gsd-import will run conflict detection, convert to GSD format,
validate via plan-checker, update ROADMAP.md, and commit.

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Launching ultraplan for Phase {N}: {phase_name}...
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Trigger ultraplan with the constructed prompt:

/ultraplan {constructed prompt from build_prompt step}

Your terminal will show a ◇ ultraplan status indicator while the remote session works. Use /tasks to open the detail view with the session link, agent activity, and a stop action.