Kimi API compatibility issues via OpenRouter

[rothnic]

Problem

When using Kimi models (e.g., kimi-k2.5) via OpenRouter, three compatibility issues prevent proper functionality:

1. 403 Forbidden Errors

Symptom: API requests return 403 Forbidden
Cause: Missing User-Agent header
Fix: Add .header("User-Agent", "claude-cli/1.0.0") to requests

2. SSE Parsing Failure

Symptom: Stream responses not parsed correctly, missing content
Cause: Kimi sends SSE as data:value without space, but code only handles data: value
Fix: Check both strip_prefix("data: ") and strip_prefix("data:")

3. Missing Reasoning Content

Symptom: Kimi's reasoning/thinking content not displayed
Cause: Kimi uses reasoning_content field instead of standard content
Fix: Parse reasoning_content field from delta and emit as TextDelta

Environment

• jcode version: latest main
• Model: kimi-k2.5 via OpenRouter
• Error: 403 Forbidden, missing stream content

Related

PR forthcoming with fixes.