refactor(core): replace legacy logger with Effect logging (#31310)

packages/opencode/src/session/compaction.ts

@@ -5,7 +5,6 @@ import { SessionID, MessageID, PartID } from "./schema"
 import { Provider } from "@/provider/provider"
 import { MessageV2 } from "./message-v2"
 import { Token } from "@/util/token"
-import { Log } from "@opencode-ai/core/util/log"
 import { SessionProcessor } from "./processor"
 import { Agent } from "@/agent/agent"
 import { Plugin } from "@/plugin"
@@ -26,8 +25,6 @@ import { ModelV2 } from "@opencode-ai/core/model"
 import { EventV2 } from "@opencode-ai/core/event"
 import { buildPrompt } from "@opencode-ai/core/session/compaction"
 
-const log = Log.create({ service: "session.compaction" })
-
 export const Event = {
   Compacted: EventV2.define({
     type: "session.compacted",
@@ -237,7 +234,9 @@ export const layer = Layer.effect(
           estimate,
         })
         if (split) keep = split
-        else if (!keep) log.info("tail fallback", { budget, size, total })
+        else if (!keep) {
+          yield* Effect.logInfo("tail fallback", { budget, size, total })
+        }
         break
       }
 
@@ -253,7 +252,7 @@ export const layer = Layer.effect(
     const prune = Effect.fn("SessionCompaction.prune")(function* (input: { sessionID: SessionID }) {
       const cfg = yield* config.get()
       if (!cfg.compaction?.prune) return
-      log.info("pruning")
+      yield* Effect.logInfo("pruning")
 
       const msgs = yield* session
         .messages({ sessionID: input.sessionID })
@@ -284,7 +283,7 @@ export const layer = Layer.effect(
         }
       }
 
-      log.info("found", { pruned, total })
+      yield* Effect.logInfo("found", { pruned, total })
       if (pruned > PRUNE_MINIMUM) {
         for (const part of toPrune) {
           if (part.state.status === "completed") {
@@ -292,7 +291,7 @@ export const layer = Layer.effect(
             yield* session.updatePart(part)
           }
         }
-        log.info("pruned", { count: toPrune.length })
+        yield* Effect.logInfo("pruned", { count: toPrune.length })
       }
     })