00:01 Seed S-hidden
00:34 Settings > General > New threads > Model. Row: "Claude Fable 5.1 · High"
00:37 settings.json defaultModelSelection = {"instanceId":"claudeAgent","model":"claude-opus-4-8","options":[{"id":"effort","value":"high"}]}
00:40 Open the effort picker (currently "High")
00:43 Choose Low
00:46 Picked Low. settings.json now {"instanceId":"claudeAgent","model":"claude-fable-5-1","options":[{"id":"effort","value":"low"}]}
00:49 Reload the page
01:10 After reload. Row: "Claude Fable 5.1 · Low"
01:12 jq .defaultModelSelection settings.json -> {"instanceId":"claudeAgent","model":"claude-fable-5-1","options":[{"id":"effort","value":"low"}]}