oe-lsp-pyright-refactor

Workflow (shim-first, LSP-first)

1. Before changes:

   • Use LSP to find the definition, outgoing calls, and references for the symbols you will move/rename.
   • Inventory importers before moving modules (including dynamic imports).

2. During refactor:

   • Keep public surfaces stable with re-exports/thin wrappers first.
   • Prefer moving pure helpers/constants before orchestration.

3. After each PR-sized step:

   • Use Pyright/LSP diagnostics to catch Optional leaks, wrong return types, and missing attributes.
   • Fix the contract at the boundary (Protocol/TypedDict) rather than sprinkling Any.

Canonical plans

• Use docs/internal/BACKEND_REFACTORING_PLAN_DEC_2025.md for step-file ladders and preserve sets.
• Use docs/internal/BACKEND_REFACTORING_PLAN_DEC_2025_ADDENDUM.md for production hardening + PH5 typing work.

Common refactor targets (Pyright tends to catch first)

• Adapter interfaces: define Protocols for optional capabilities instead of hasattr-only contracts.
• API boundary models: ensure required fields never receive None (or model them as Optional intentionally).
• “stringly typed” payloads: introduce TypedDicts for event_entry, draft_messages, process_msg output.