BC Observatoryunofficial, made by waldo
community postAL Developmentcommunity - not Microsoftreviewed - checked by Opus

Copilot Plan Mode in AL: Clarifying Intent Before Writing Code

Plan mode in GitHub Copilot for AL development clarifies architectural intent and design decisions before code generation. It is most valuable when features span multiple objects or when Agent mode will be used extensively, helping teams align on responsibilities and structure before implementation begins.

Open in Claude7383.md

post think about IT

Steven Renders · 2025-12-23 · 787 words · about 4 min

"Plan mode exists to address that problem. It creates a moment where nothing is executed, assumptions are surfaced, intent is made explicit."
Show the post hereRead on think about IT

Key points

  • Plan mode produces a structured approach and explicit assumptions without writing or modifying code, functioning as a design conversation tool
  • AL projects benefit from upfront clarity about where validation, business logic, and responsibilities belong across tables, codeunits, and pages
  • Combining Plan mode with Agent mode makes Agent more predictable and focused by narrowing scope to specific implementation steps
  • Plan mode is most useful for features touching multiple objects or complex architecture; it is unnecessary for small refactors or single-trigger fixes

Quotes

  • “Plan mode exists to address that problem. It creates a moment where nothing is executed, assumptions are surfaced, intent is made explicit.” (Explains the core value of Plan mode - creating a deliberate pause before code generation to surface and align on design decisions)
  • “Plan does not slow development down. It reduces rework.” (Clarifies that upfront planning is an investment that prevents costly rework later in AL projects)
  • “If Agent is about doing, Plan is about deciding.” (Succinctly captures the distinct role of Plan mode in the Copilot workflow, emphasizing decision-making over execution)

Context

  • Features: Copilot Plan mode, Copilot Chat, Copilot Ask, Copilot Edit, Copilot Agent, GitHub Copilot in VSCode

Source: think about IT - Steven Renders, community blog. Summary, key points and quotes are derived (CONTENT-NOTICE.md); read the original for the full text.