refactor: functional Janitor architecture with unified notifications

* refactor: convert Janitor class and notifications to functional components

- Extract notification logic from Janitor into lib/notification.ts
- Convert Janitor class to pure functions with JanitorContext
- Extract message parsing and LLM analysis into separate functions
- Rename notification functions to match config (sendPruningSummary, sendMinimalSummary, sendDetailedSummary)
- Update callers (index.ts, hooks.ts, pruning-tool.ts) to use functional API

* refactor: make batch a protected tool, remove cascade pruning

- Add 'batch' to default protectedTools in config
- Remove batchToolChildren tracking from parseMessages()
- Remove expandBatchIds() function
- Batch children are now pruned individually by LLM decision

* chore: remove dead batch checks from notification.ts

* chore: remove batch display logic from display-utils

* refactor: reorganize lib/ into core/, state/, api-formats/, ui/ subdirectories

* refactor: add strategies infrastructure and migrate deduplication

* chore: update opencode-auth-provider to 0.1.7

* feat: unified notification system with GC tracking

- Add GCStats type and gcPending state to track deduplication activity
- Accumulate GC stats during fetch when runStrategies prunes duplicates
- Rewrite notification system to combine AI analysis and GC in one display
- Show GC-only notifications when AI prunes nothing but deduplication occurred
- Track totalGCTokens in session stats for lifetime GC contribution
- Display format: '🧹 DCP: ~20K saved (10 tools, ♻️ ~500) │ Session: ...'
- GC-only format: '♻️ DCP: ~500 collected │ Session: ...'

* fix: show combined AI + GC tokens in notification headline

* chore: change GC icon from recycle to wastebasket

* fix: include GC tokens in session total and improve icon placement

Author: Tarquinen

index.ts

@@ -1,14 +1,14 @@
 import type { Plugin } from "@opencode-ai/plugin"
 import { getConfig } from "./lib/config"
 import { Logger } from "./lib/logger"
-import { Janitor } from "./lib/janitor"
+import { createJanitorContext } from "./lib/core/janitor"
 import { checkForUpdates } from "./lib/version-checker"
 import { createPluginState } from "./lib/state"
 import { installFetchWrapper } from "./lib/fetch-wrapper"
 import { createPruningTool } from "./lib/pruning-tool"
 import { createEventHandler, createChatParamsHandler } from "./lib/hooks"
-import { createToolTracker } from "./lib/synth-instruction"
-import { loadPrompt } from "./lib/prompt"
+import { createToolTracker } from "./lib/api-formats/synth-instruction"
+import { loadPrompt } from "./lib/core/prompt"
 
 const plugin: Plugin = (async (ctx) => {
     const { config, migrations } = getConfig(ctx)
@@ -26,16 +26,18 @@ const plugin: Plugin = (async (ctx) => {
     const logger = new Logger(config.debug)
     const state = createPluginState()
 
-    const janitor = new Janitor(
+    const janitorCtx = createJanitorContext(
         ctx.client,
         state,
         logger,
-        config.protectedTools,
-        config.model,
-        config.showModelErrorToasts,
-        config.strictModelSelection,
-        config.pruning_summary,
-        ctx.directory
+        {
+            protectedTools: config.protectedTools,
+            model: config.model,
+            showModelErrorToasts: config.showModelErrorToasts ?? true,
+            strictModelSelection: config.strictModelSelection ?? false,
+            pruningSummary: config.pruning_summary,
+            workingDirectory: ctx.directory
+        }
     )
 
     // Create tool tracker and load prompts for synthetic instruction injection
@@ -85,10 +87,10 @@ const plugin: Plugin = (async (ctx) => {
     }
 
     return {
-        event: createEventHandler(ctx.client, janitor, logger, config, toolTracker),
+        event: createEventHandler(ctx.client, janitorCtx, logger, config, toolTracker),
         "chat.params": createChatParamsHandler(ctx.client, state, logger),
         tool: config.strategies.onTool.length > 0 ? {
-            prune: createPruningTool(ctx.client, janitor, config, toolTracker),
+            prune: createPruningTool(ctx.client, janitorCtx, config, toolTracker),
         } : undefined,
     }
 }) satisfies Plugin

lib/synth-instruction.ts lib/api-formats/synth-instruction.tslib/synth-instruction.ts renamed to lib/api-formats/synth-instruction.ts

@@ -30,7 +30,7 @@ export interface ConfigResult {
 const defaultConfig: PluginConfig = {
     enabled: true,
     debug: false,
-    protectedTools: ['task', 'todowrite', 'todoread', 'prune'],
+    protectedTools: ['task', 'todowrite', 'todoread', 'prune', 'batch'],
     showModelErrorToasts: true,
     strictModelSelection: false,
     pruning_summary: 'detailed',