diff --git a/apps/api/migrations/adr091_aider_events_schema.sql b/apps/api/migrations/adr091_aider_events_schema.sql
new file mode 100644
index 00000000..05465fc8
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+++ b/apps/api/migrations/adr091_aider_events_schema.sql
@@ -0,0 +1,22 @@
+-- adr091: aider_events schema
+-- 2026-04-20 @ Asia/Taipei
+-- 紀錄統帥本機 aider CLI 活動，供 AI Router feedback + symptom_pattern 抽取
+
+CREATE TABLE IF NOT EXISTS aider_events (
+  id              BIGSERIAL PRIMARY KEY,
+  session_id      TEXT NOT NULL,
+  ts              TIMESTAMPTZ NOT NULL,
+  type            TEXT NOT NULL,                  -- session_start|file_edit|error|commit|silent_timeout|session_end|raw
+  host            TEXT DEFAULT 'ogt-mac',
+  payload         JSONB NOT NULL,
+  incident_id     TEXT,
+  created_at      TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+CREATE INDEX IF NOT EXISTS aider_events_session_idx ON aider_events(session_id);
+CREATE INDEX IF NOT EXISTS aider_events_type_ts_idx ON aider_events(type, ts DESC);
+CREATE INDEX IF NOT EXISTS aider_events_ts_idx ON aider_events(ts DESC);
+CREATE INDEX IF NOT EXISTS aider_events_payload_gin ON aider_events USING GIN (payload);
+
+COMMENT ON TABLE aider_events IS 'aider CLI 事件流（Mac 端 aiderw wrapper 推入）';
+COMMENT ON COLUMN aider_events.incident_id IS '若觸發建 incident，記 FK 至 incidents.incident_id';
+COMMENT ON COLUMN aider_events.payload IS 'Type-specific payload JSON，見 src/models/aider.py schema';