feat(ipuaro): add context configuration

- Add ContextConfigSchema with systemPromptTokens, maxContextUsage, autoCompressAt, compressionMethod
- Update ContextManager to read compression threshold from config
- Update HandleMessage and useSession to pass context config
- Add 40 unit tests (32 schema + 8 integration)
- Coverage: 97.63% lines, 91.34% branches

packages/ipuaro/src/application/use-cases/ContextManager.ts

@@ -2,6 +2,7 @@ import type { ContextState, Session } from "../../domain/entities/Session.js"
 import type { ILLMClient } from "../../domain/services/ILLMClient.js"
 import { type ChatMessage, createSystemMessage } from "../../domain/value-objects/ChatMessage.js"
 import { CONTEXT_COMPRESSION_THRESHOLD, CONTEXT_WINDOW_SIZE } from "../../domain/constants/index.js"
+import type { ContextConfig } from "../../shared/constants/config.js"
 
 /**
  * File in context with token count.
@@ -39,9 +40,13 @@ export class ContextManager {
     private readonly filesInContext = new Map<string, FileContext>()
     private currentTokens = 0
     private readonly contextWindowSize: number
+    private readonly compressionThreshold: number
+    private readonly compressionMethod: "llm-summary" | "truncate"
 
-    constructor(contextWindowSize: number = CONTEXT_WINDOW_SIZE) {
+    constructor(contextWindowSize: number = CONTEXT_WINDOW_SIZE, config?: ContextConfig) {
         this.contextWindowSize = contextWindowSize
+        this.compressionThreshold = config?.autoCompressAt ?? CONTEXT_COMPRESSION_THRESHOLD
+        this.compressionMethod = config?.compressionMethod ?? "llm-summary"
     }
 
     /**
@@ -97,7 +102,7 @@ export class ContextManager {
      * Check if compression is needed.
      */
     needsCompression(): boolean {
-        return this.getUsage() > CONTEXT_COMPRESSION_THRESHOLD
+        return this.getUsage() > this.compressionThreshold
     }
 
     /**

packages/ipuaro/src/application/use-cases/HandleMessage.ts

@@ -70,6 +70,7 @@ export interface HandleMessageOptions {
     maxToolCalls?: number
     maxHistoryMessages?: number
     saveInputHistory?: boolean
+    contextConfig?: import("../../shared/constants/config.js").ContextConfig
 }
 
 const DEFAULT_MAX_TOOL_CALLS = 20
@@ -98,13 +99,14 @@ export class HandleMessage {
         llm: ILLMClient,
         tools: IToolRegistry,
         projectRoot: string,
+        contextConfig?: import("../../shared/constants/config.js").ContextConfig,
     ) {
         this.storage = storage
         this.sessionStorage = sessionStorage
         this.llm = llm
         this.tools = tools
         this.projectRoot = projectRoot
-        this.contextManager = new ContextManager(llm.getContextWindowSize())
+        this.contextManager = new ContextManager(llm.getContextWindowSize(), contextConfig)
         this.executeTool = new ExecuteTool(storage, sessionStorage, tools, projectRoot)
     }
 

packages/ipuaro/src/shared/constants/config.ts

@@ -106,6 +106,16 @@ export const SessionConfigSchema = z.object({
     saveInputHistory: z.boolean().default(true),
 })
 
+/**
+ * Context configuration schema.
+ */
+export const ContextConfigSchema = z.object({
+    systemPromptTokens: z.number().int().positive().default(2000),
+    maxContextUsage: z.number().min(0).max(1).default(0.8),
+    autoCompressAt: z.number().min(0).max(1).default(0.8),
+    compressionMethod: z.enum(["llm-summary", "truncate"]).default("llm-summary"),
+})
+
 /**
  * Full configuration schema.
  */
@@ -119,6 +129,7 @@ export const ConfigSchema = z.object({
     input: InputConfigSchema.default({}),
     display: DisplayConfigSchema.default({}),
     session: SessionConfigSchema.default({}),
+    context: ContextConfigSchema.default({}),
 })
 
 /**
@@ -134,6 +145,7 @@ export type EditConfig = z.infer<typeof EditConfigSchema>
 export type InputConfig = z.infer<typeof InputConfigSchema>
 export type DisplayConfig = z.infer<typeof DisplayConfigSchema>
 export type SessionConfig = z.infer<typeof SessionConfigSchema>
+export type ContextConfig = z.infer<typeof ContextConfigSchema>
 
 /**
  * Default configuration.

packages/ipuaro/src/tui/hooks/useSession.ts

@@ -109,6 +109,7 @@ async function initializeSession(
         deps.llm,
         deps.tools,
         deps.projectRoot,
+        deps.config?.context,
     )
     if (deps.projectStructure) {
         handleMessage.setProjectStructure(deps.projectStructure)
@@ -117,6 +118,7 @@ async function initializeSession(
         autoApply: options.autoApply,
         maxHistoryMessages: deps.config?.session.maxHistoryMessages,
         saveInputHistory: deps.config?.session.saveInputHistory,
+        contextConfig: deps.config?.context,
     })
     handleMessage.setEvents(createEventHandlers(setters, options))
     refs.current.handleMessage = handleMessage