feat: add Kimi Code CLI support

[classicrob]

Summary

• Add support for Kimi CLI as a new engine backend
• Kimi CLI is similar to Claude Code, providing AI-assisted coding in the terminal
• Follows the same architecture patterns as existing runners (Claude, Codex, OpenCode, Pi)

Changes

New files:

• src/takopi/schemas/kimi.py - msgspec models for Kimi's stream-json output format
• src/takopi/runners/kimi.py - KimiRunner implementation with full event translation
• tests/test_kimi_schema.py - Schema parsing tests (6 tests)
• tests/test_kimi_runner.py - Runner and translation tests (14 tests)
• tests/fixtures/kimi_stream_json_session.jsonl - Test fixture

Modified:

• pyproject.toml - Added entry point for kimi backend

Configuration

default_engine = "kimi"

[kimi]
model = "kimi-k2"  # optional
extra_args = ["--thinking"]  # optional

Key Implementation Details

Feature	Claude Code	Kimi CLI
Resume flag	--resume <id>	--session <id>
Output format	Structured with system.init, result events	Role-based messages (assistant, tool, user)
Tool calls	In message.content array	In tool_calls array with JSON arguments

Test plan

• All 20 new Kimi tests pass
• Full test suite passes (560 tests)
• Coverage maintained at 81.5%

🤖 Generated with Claude Code

[classicrob]

Hey also if there's any way I can contribute PRs more effectively, lmk. This felt like a fairly straightforward one, I just added Kimi cli support personally bc I love the model and wanted to explore its parallel subagent capabilities and thought other people might also want it.

[asianviking]

@classicrob heya, I think you can create a transport plugin instead called takopi-kimi for example and then open a pr to add it to the plugins list on the docs