Add changeset

Author: Suresh Sivasankaran

.changeset/good-pigs-beam.md

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+---
+"@kilocode/cli": minor
+---
+
+This PR improves the display of MCP tool requests and responses in the CLI, addressing issues with truncated payloads, poor formatting, and lack of metadata.
+
+- MCP request arguments were difficult to read (no formatting, no preview mode)
+- MCP response payloads were displayed as raw text dumps, overwhelming the terminal
+- No JSON detection or pretty-printing
+- No metadata about content size or type
+- Missing error handling for malformed data
+- No indication when content is truncated/previewed
+
+Created new `SayMcpServerResponseMessage` component for MCP responses and refactored `AskUseMcpServerMessage` to share formatting logic. Both will make use of newly added utility functions for JSON detection, formatting, and metadata display.
+`formatContentWithMetadata()` - Detects JSON, formats it, handles preview logic (>20 lines → show 5)
+`formatJson()` - Pretty-prints JSON with configurable indentation
+`calculateByteSize()` - Chunked processing for large strings (>10KB) to avoid memory spikes
+`formatByteSize()`, `buildMetadataString()` - Display helpers
+
+| before                                                                                                                               | after                                                                                                                               |
+| ------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------- |
+| <img width="1511" height="890" alt="before" src="https://github.com/user-attachments/assets/9b57d85c-1846-42d5-ba7b-2511a96e77b2" /> | <img width="1510" height="884" alt="after" src="https://github.com/user-attachments/assets/1a7599ce-4112-40d0-ac47-678d626cb51c" /> |
+
+Run the KiloCode CLI and let it automatically use any configured MCP server.