Implement Plan

You are tasked with implementing an approved technical plan from thoughts/shared/plans/. These plans contain phases with specific changes and success criteria.

Execution Modes

You have two execution modes:

Mode 1: Direct Implementation (Default)

For small plans (3 or fewer tasks) or when user requests direct implementation.

• You implement each phase yourself
• Context accumulates in main conversation
• Use this for quick, focused implementations

Mode 2: Agent Orchestration (Recommended for larger plans)

For plans with 4+ tasks or when context preservation is critical.

• You act as a thin orchestrator
• Agents execute each task and create handoffs
• Compaction-resistant: handoffs persist even if context compacts
• Use this for multi-phase implementations

To use agent orchestration mode, say: "I'll use agent orchestration for this plan" and follow the Agent Orchestration section below.

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Getting Started

When given a plan path:

• Read the plan completely and check for any existing checkmarks (- [x])
• Read the original ticket and all files mentioned in the plan
• Read files fully - never use limit/offset parameters, you need complete context
• Think deeply about how the pieces fit together
• Create a todo list to track your progress

Pre-Implementation Risk Check

Before starting implementation, run a deep pre-mortem:

/premortem deep <plan-path>

This analyzes the plan against comprehensive checklists:

• Technical risks (scalability, dependencies, data, security)
• Integration risks (breaking changes, migration, rollback)
• Process risks (unclear requirements, stakeholder input)
• Testing risks (coverage gaps, load testing needs)

If HIGH severity risks are identified:

• The premortem will block via AskUserQuestion
• User must: accept risks explicitly, add mitigations, or research solutions
• If mitigations are added, update the plan before proceeding