Fix terminal snapshots reflowing after resize

Terminal snapshots now carry soft-wrap row metadata only to clients that advertise support, so restored output can resize like live output without breaking older clients.

packages/protocol/src/messages.ts

@@ -485,15 +485,13 @@ const ToolCallDetailPayloadSchema: z.ZodType<ToolCallDetail, z.ZodTypeDef, unkno
     }),
   ]);
 
-const ToolCallBasePayloadSchema = z
-  .object({
-    type: z.literal("tool_call"),
-    callId: z.string(),
-    name: z.string(),
-    detail: ToolCallDetailPayloadSchema,
-    metadata: z.record(z.string(), z.unknown()).optional(),
-  })
-  .strict();
+const ToolCallBasePayloadSchema = z.object({
+  type: z.literal("tool_call"),
+  callId: z.string(),
+  name: z.string(),
+  detail: ToolCallDetailPayloadSchema,
+  metadata: z.record(z.string(), z.unknown()).optional(),
+});
 
 const ToolCallRunningPayloadSchema = ToolCallBasePayloadSchema.extend({
   status: z.literal("running"),
@@ -1808,10 +1806,8 @@ export const SubscribeTerminalRequestSchema = z.object({
           rows: z.number().int().positive(),
           cols: z.number().int().positive(),
         })
-        .strict()
         .optional(),
     })
-    .strict()
     .optional(),
 });
 
@@ -3540,44 +3536,45 @@ const TerminalInfoSchema = z.object({
   title: z.string().optional(),
 });
 
-export const TerminalCellSchema = z
-  .object({
-    char: z.string(),
-    fg: z.number().optional(),
-    bg: z.number().optional(),
-    fgMode: z.number().optional(),
-    bgMode: z.number().optional(),
-    bold: z.boolean().optional(),
-    italic: z.boolean().optional(),
-    underline: z.boolean().optional(),
-    dim: z.boolean().optional(),
-    inverse: z.boolean().optional(),
-    strikethrough: z.boolean().optional(),
-  })
-  .strict();
+export const TerminalCellSchema = z.object({
+  char: z.string(),
+  fg: z.number().optional(),
+  bg: z.number().optional(),
+  fgMode: z.number().optional(),
+  bgMode: z.number().optional(),
+  bold: z.boolean().optional(),
+  italic: z.boolean().optional(),
+  underline: z.boolean().optional(),
+  dim: z.boolean().optional(),
+  inverse: z.boolean().optional(),
+  strikethrough: z.boolean().optional(),
+});
 
 export const TerminalCursorStyleSchema = z.enum(["block", "underline", "bar"]);
 
-export const TerminalCursorSchema = z
-  .object({
-    row: z.number(),
-    col: z.number(),
-    hidden: z.boolean().optional(),
-    style: TerminalCursorStyleSchema.optional(),
-    blink: z.boolean().optional(),
-  })
-  .strict();
+export const TerminalCursorSchema = z.object({
+  row: z.number(),
+  col: z.number(),
+  hidden: z.boolean().optional(),
+  style: TerminalCursorStyleSchema.optional(),
+  blink: z.boolean().optional(),
+});
 
-export const TerminalStateSchema = z
-  .object({
-    rows: z.number(),
-    cols: z.number(),
-    grid: z.array(z.array(TerminalCellSchema)),
-    scrollback: z.array(z.array(TerminalCellSchema)),
-    cursor: TerminalCursorSchema,
-    title: z.string().optional(),
-  })
-  .strict();
+export const TerminalStateSchema = z.object({
+  rows: z.number(),
+  cols: z.number(),
+  grid: z.array(z.array(TerminalCellSchema)),
+  scrollback: z.array(z.array(TerminalCellSchema)),
+  cursor: TerminalCursorSchema,
+  title: z.string().optional(),
+  // Per-row soft-wrap flags aligned 1:1 with `grid` / `scrollback`. `true` means
+  // the row continued onto the next row (xterm's GRID_LINE_WRAPPED equivalent),
+  // so the client can re-wrap the logical line on resize instead of freezing it
+  // at the snapshot width. Optional: only sent to clients that advertise the
+  // `terminalReflowableSnapshot` capability, so old daemons/clients are unaffected.
+  gridWrapped: z.array(z.boolean()).optional(),
+  scrollbackWrapped: z.array(z.boolean()).optional(),
+});
 
 export const ListTerminalsResponseSchema = z.object({
   type: z.literal("list_terminals_response"),
@@ -4108,6 +4105,7 @@ export const WSHelloMessageSchema = z.object({
       pushNotifications: z.boolean().optional(),
       [CLIENT_CAPS.reasoningMergeEnum]: z.boolean().optional(),
       [CLIENT_CAPS.customModeIcons]: z.boolean().optional(),
+      [CLIENT_CAPS.terminalReflowableSnapshot]: z.boolean().optional(),
     })
     .passthrough()
     .optional(),