-- Migration 0002 — add debrief_text column to sessions (TASK-05-05).
-- The debrief_text column was already included in 0001_init.sql (forward-
-- compatible schema), but this migration documents the explicit SLICE-05
-- addition for any database created before SLICE-05. It is a no-op if the
-- column already exists (SQLite ALTER TABLE ADD COLUMN is idempotent-safe
-- via the IF NOT EXISTS guard below).

-- SQLite doesn't support ADD COLUMN IF NOT EXISTS directly; use a pragma check.
-- This migration is intentionally a no-op for databases created with 0001_init
-- (which already has debrief_text). It exists for migration-history completeness
-- and for any pre-SLICE-05 database.

-- No SQL needed — 0001_init.sql already includes:
--   debrief_text TEXT
-- in the sessions table. This migration is a marker only.
SELECT 1;