refactor: MCP層をmcpc APIベースに刷新

- 独自JSON-RPC処理をmcpcへ置き換え
- 各MCPツールを個別ソースへ分離
- 共通コンテキストと登録処理を整理
- mcpc互換修正と統合テストを更新

3 files changed, 6 insertions, 4 deletions

diff --git a/tests/fixtures/health.jsonl b/tests/fixtures/health.jsonl
index 8d1a19f..95642eb 100644
--- a/tests/fixtures/health.jsonl
+++ b/tests/fixtures/health.jsonl
@@ -1,3 +1,4 @@
 {"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"lifecycle","version":"1"}}}
+{"jsonrpc":"2.0","method":"notifications/initialized","params":{}}
 {"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"read_messages","arguments":{"session_id":"lifecycle"}}}
 {"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"get_system_health","arguments":{}}}
diff --git a/tests/fixtures/smoke-input.jsonl b/tests/fixtures/smoke-input.jsonl
index 64bf18f..c746dac 100644
--- a/tests/fixtures/smoke-input.jsonl
+++ b/tests/fixtures/smoke-input.jsonl
@@ -1,9 +1,9 @@
 {"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"tiny-convmem-smoke","version":"0.1.0"}}}
 {"jsonrpc":"2.0","method":"notifications/initialized","params":{}}
 {"jsonrpc":"2.0","id":2,"method":"tools/list","params":{}}
-{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"write_message","arguments":{"session_id":"smoke","role":"user","content":"hello durable memory","metadata":{"tags":["hello","memory"],"memory_tier":"short"}}}}
+{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"write_message","arguments":{"session_id":"smoke","role":"user","content":"hello durable memory","metadata_json":"{\"tags\":[\"hello\",\"memory\"],\"memory_tier\":\"short\"}"}}}
 {"jsonrpc":"2.0","id":4,"method":"tools/call","params":{"name":"read_messages","arguments":{"session_id":"smoke"}}}
-{"jsonrpc":"2.0","id":5,"method":"tools/call","params":{"name":"search_messages","arguments":{"query":"durable","limit":10}}}
+{"jsonrpc":"2.0","id":5,"method":"tools/call","params":{"name":"search_messages","arguments":{"query":"durable","session_id":"","limit":10}}}
 {"jsonrpc":"2.0","id":6,"method":"tools/call","params":{"name":"rebuild_index","arguments":{}}}
 {"jsonrpc":"2.0","id":7,"method":"tools/call","params":{"name":"get_system_health","arguments":{}}}
-{"jsonrpc":"2.0","id":8,"method":"tools/call","params":{"name":"write_message","arguments":{"session_id":"smoke","role":"user","content":"must not be stored","unexpected":true}}}
+{"jsonrpc":"2.0","id":8,"method":"tools/call","params":{"name":"write_message","arguments":{"session_id":"smoke","role":"user","content":"must not be stored","metadata_json":"{\"unexpected\":true}"}}}
diff --git a/tests/fixtures/write-once.jsonl b/tests/fixtures/write-once.jsonl
index 0378968..1ad02ae 100644
--- a/tests/fixtures/write-once.jsonl
+++ b/tests/fixtures/write-once.jsonl
@@ -1,2 +1,3 @@
 {"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"lifecycle","version":"1"}}}
-{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"write_message","arguments":{"session_id":"lifecycle","role":"user","content":"secret-to-remove","metadata":{"tags":["秘密","remove"],"memory_tier":"long"}}}}
+{"jsonrpc":"2.0","method":"notifications/initialized","params":{}}
+{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"write_message","arguments":{"session_id":"lifecycle","role":"user","content":"secret-to-remove","metadata_json":"{\"tags\":[\"秘密\",\"remove\"],\"memory_tier\":\"long\"}"}}}