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plan-builder

Write implementation plans with appropriate templates based on complexity. Use when planning features or changes. Provides minimal, standard, and full templates for different scope levels.

Stars
39
Source
majesticlabs-dev/majestic-marketplace
Updated
2026-05-13
Slug
majesticlabs-dev--majestic-marketplace--plan-builder
View on GitHubRaw SKILL.md

// install — copy + paste into any project

mkdir -p .claude/skills && curl -fsSL https://raw.githubusercontent.com/majesticlabs-dev/majestic-marketplace/HEAD/plugins/majestic-engineer/skills/plan-builder/SKILL.md -o .claude/skills/plan-builder.md

Drops the SKILL.md into .claude/skills/plan-builder.md. Works with Claude Code, Cursor, and any agent that loads SKILL.md files from .claude/skills/.

Plan Builder

Write implementation plans using the appropriate template based on complexity.

Template Selection

Complexity When to Use Template
Minimal Simple bugs, small improvements, clear single-file changes references/minimal.md
Standard Most features, complex bugs, team collaboration references/standard.md
Comprehensive Major features, architectural changes, multi-phase work references/comprehensive.md

Selection Criteria

Use Minimal When

  • Fix is obvious and localized
  • Single file or 2-3 related files
  • No architectural decisions needed
  • Clear acceptance criteria from description

Use Standard When (Default)

  • Multiple components affected
  • Requires research or external docs
  • Team needs context for review
  • Has dependencies or risks

Use Comprehensive When

  • New system or major feature
  • Multiple phases of work
  • Architectural decisions required
  • Cross-cutting concerns (security, performance)
  • Involves multiple teams or stakeholders

Plan Output

Write plans to: docs/plans/[YYYYMMDDHHMMSS]_<title>.md

Include in every plan:

  • Research findings with file paths (e.g., src/models/user.rb:42)
  • External documentation URLs
  • Related issues/PRs if known
  • Acceptance Criteria from user input (populated from blueprint Step 2)

Conditional Sections

UI Features

Include "Design System Reference" section when feature involves:

  • Pages, components, forms, buttons, modals
  • Visual design elements

DevOps Features

Include "Infrastructure Context" section when feature involves:

  • Terraform/OpenTofu, Ansible, cloud resources
  • Docker, CI/CD, infrastructure

Anti-Patterns

Don't Do
Use comprehensive for simple bugs Match template to actual complexity
Skip Acceptance Criteria Always include testable criteria
Leave placeholder text Fill all sections or remove them
Over-plan obvious changes Minimal template exists for a reason