chore(ipuaro): release v0.25.0

- Add interface field display in initial context: interface User { id: string, name: string }
- Add type alias definition display: type UserId = string
- Support readonly fields, extends, union/intersection types
- Add definition field to TypeAliasInfo in FileAST
- Update ASTParser to extract type alias definitions
- Add formatInterfaceSignature() and formatTypeAliasSignature() helpers
- Truncate long type definitions at 80 characters
- Translate ROADMAP.md from Russian to English
- Add 18 new tests for interface fields and type aliases

packages/ipuaro/CHANGELOG.md

@@ -5,6 +5,143 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.25.0] - 2025-12-04 - Rich Initial Context: Interface Fields & Type Definitions
+
+### Added
+
+- **Interface Field Definitions (0.24.2)**
+  - Interfaces now show their fields in initial context
+  - New format: `interface User { id: string, name: string, email: string }`
+  - Readonly fields marked: `interface Config { readonly version: string }`
+  - Extends still supported: `interface AdminUser extends User { role: string }`
+
+- **Type Alias Definitions (0.24.2)**
+  - Type aliases now show their definitions in initial context
+  - Simple types: `type UserId = string`
+  - Union types: `type Status = "pending" | "active" | "done"`
+  - Intersection types: `type AdminUser = User & Admin`
+  - Function types: `type Handler = (event: Event) => void`
+  - Long definitions truncated at 80 characters with `...`
+
+- **New Helper Functions in prompts.ts**
+  - `formatInterfaceSignature()` - formats interface with fields
+  - `formatTypeAliasSignature()` - formats type alias with definition
+  - `truncateDefinition()` - truncates long type definitions
+
+### Changed
+
+- **FileAST.ts**
+  - Added `definition?: string` field to `TypeAliasInfo` interface
+
+- **ASTParser.ts**
+  - `extractTypeAlias()` now extracts the type definition via `childForFieldName(VALUE)`
+  - Supports all type kinds: simple, union, intersection, object, function, generic, array, tuple
+
+- **prompts.ts**
+  - `formatFileSummary()` now uses `formatInterfaceSignature()` for interfaces
+  - `formatFileSummary()` now uses `formatTypeAliasSignature()` for type aliases
+
+### New Context Format
+
+```
+### src/types/user.ts
+- interface User { id: string, name: string, email: string }
+- interface UserDTO { name: string, email?: string }
+- type UserId = string
+- type Status = "pending" | "active" | "done"
+- type AdminUser = User & Admin
+```
+
+### Technical Details
+
+- Total tests: 1720 passed (was 1702, +18 new tests)
+  - 10 new tests for interface field formatting
+  - 8 new tests for type alias definition extraction
+- Coverage: 97.5% lines, 91.04% branches, 98.6% functions
+- 0 ESLint errors, 1 warning (pre-existing complexity in ASTParser)
+- Build successful
+
+### Notes
+
+This completes the second part of Rich Initial Context milestone:
+- ✅ 0.24.1 - Function Signatures with Types
+- ✅ 0.24.2 - Interface/Type Field Definitions
+- ⏳ 0.24.3 - Enum Value Definitions
+- ⏳ 0.24.4 - Decorator Extraction
+
+---
+
+## [0.24.0] - 2025-12-04 - Rich Initial Context: Function Signatures
+
+### Added
+
+- **Function Signatures in Context (0.24.1)**
+  - Full function signatures with parameter types and return types in initial context
+  - New format: `async getUser(id: string): Promise<User>` instead of `fn: getUser`
+  - Classes show inheritance: `class UserService extends BaseService implements IService`
+  - Interfaces show extends: `interface AdminUser extends User, Admin`
+  - Optional parameters marked with `?`: `format(value: string, options?: FormatOptions)`
+
+- **BuildContextOptions Interface**
+  - New `includeSignatures?: boolean` option for `buildInitialContext()`
+  - Controls signature vs compact format (default: `true` for signatures)
+
+- **Configuration**
+  - Added `includeSignatures: boolean` to `ContextConfigSchema` (default: `true`)
+  - Users can disable signatures to save tokens: `context.includeSignatures: false`
+
+### Changed
+
+- **ASTParser**
+  - Arrow functions now extract `returnType` in `extractLexicalDeclaration()`
+  - Return type format normalized (strips leading `: `)
+
+- **prompts.ts**
+  - New `formatFunctionSignature()` helper function
+  - `formatFileSummary()` now shows full signatures by default
+  - Added `formatFileSummaryCompact()` for legacy format
+  - `formatFileOverview()` accepts `includeSignatures` parameter
+  - Defensive handling for missing interface `extends` array
+
+### New Context Format (default)
+
+```
+### src/services/user.ts
+- async getUser(id: string): Promise<User>
+- async createUser(data: UserDTO): Promise<User>
+- validateEmail(email: string): boolean
+- class UserService extends BaseService
+- interface IUserService extends IService
+- type UserId
+```
+
+### Compact Format (includeSignatures: false)
+
+```
+- src/services/user.ts [fn: getUser, createUser | class: UserService | interface: IUserService | type: UserId]
+```
+
+### Technical Details
+
+- Total tests: 1702 passed (was 1687, +15 new tests)
+  - 8 new tests for function signature formatting
+  - 5 new tests for `includeSignatures` configuration
+  - 1 new test for compact format
+  - 1 new test for undefined AST entries
+- Coverage: 97.54% lines, 91.14% branches, 98.59% functions
+- 0 ESLint errors, 2 warnings (complexity in ASTParser and prompts)
+- Build successful
+
+### Notes
+
+This is the first part of v0.24.0 Rich Initial Context milestone:
+- ✅ 0.24.1 - Function Signatures with Types
+- ⏳ 0.24.2 - Interface/Type Field Definitions
+- ⏳ 0.24.3 - Enum Value Definitions
+- ⏳ 0.24.4 - Decorator Extraction
+
+---
+
 ## [0.23.0] - 2025-12-04 - JSON/YAML & Symlinks
 
 ### Added

packages/ipuaro/ROADMAP.md

@@ -1333,40 +1333,40 @@ class ErrorHandler {
 **Priority:** HIGH
 **Status:** Complete (v0.19.0 released)
 
-Рефакторинг: переход на чистый XML формат для tool calls (как в CONCEPT.md).
+Refactoring: transition to pure XML format for tool calls (as in CONCEPT.md).
 
-### Текущая проблема
+### Current Problem
 
-OllamaClient использует Ollama native tool calling (JSON Schema), а ResponseParser реализует XML парсинг. Это создаёт путаницу и не соответствует CONCEPT.md.
+OllamaClient uses Ollama native tool calling (JSON Schema), while ResponseParser implements XML parsing. This creates confusion and doesn't match CONCEPT.md.
 
 ### 0.19.1 - OllamaClient Refactor
 
 ```typescript
 // src/infrastructure/llm/OllamaClient.ts
 
-// БЫЛО:
-// - Передаём tools в Ollama SDK format
-// - Извлекаем tool_calls из response.message.tool_calls
+// BEFORE:
+// - Pass tools in Ollama SDK format
+// - Extract tool_calls from response.message.tool_calls
 
-// СТАНЕТ:
-// - НЕ передаём tools в SDK
-// - Tools описаны в system prompt как XML
-// - LLM возвращает XML в content
-// - Парсим через ResponseParser
+// AFTER:
+// - DON'T pass tools to SDK
+// - Tools described in system prompt as XML
+// - LLM returns XML in content
+// - Parse via ResponseParser
 ```
 
-**Изменения:**
-- [x] Удалить `convertTools()` метод
-- [x] Удалить `extractToolCalls()` метод
-- [x] Убрать передачу `tools` в `client.chat()`
-- [x] Возвращать только `content` без `toolCalls`
+**Changes:**
+- [x] Remove `convertTools()` method
+- [x] Remove `extractToolCalls()` method
+- [x] Remove `tools` from `client.chat()` call
+- [x] Return only `content` without `toolCalls`
 
 ### 0.19.2 - System Prompt Update
 
 ```typescript
 // src/infrastructure/llm/prompts.ts
 
-// Добавить в SYSTEM_PROMPT полное описание XML формата:
+// Add full XML format description to SYSTEM_PROMPT:
 
 const TOOL_FORMAT_INSTRUCTIONS = `
 ## Tool Calling Format
@@ -1397,73 +1397,73 @@ Always wait for tool results before making conclusions.
 `
 ```
 
-**Изменения:**
-- [x] Добавить `TOOL_FORMAT_INSTRUCTIONS` в prompts.ts
-- [x] Включить в `SYSTEM_PROMPT`
-- [x] Добавить примеры для всех 18 tools
+**Changes:**
+- [x] Add `TOOL_FORMAT_INSTRUCTIONS` to prompts.ts
+- [x] Include in `SYSTEM_PROMPT`
+- [x] Add examples for all 18 tools
 
 ### 0.19.3 - HandleMessage Simplification
 
 ```typescript
 // src/application/use-cases/HandleMessage.ts
 
-// БЫЛО:
+// BEFORE:
 // const response = await this.llm.chat(messages)
 // const parsed = parseToolCalls(response.content)
 
-// СТАНЕТ:
-// const response = await this.llm.chat(messages)  // без tools
-// const parsed = parseToolCalls(response.content) // единственный источник
+// AFTER:
+// const response = await this.llm.chat(messages)  // without tools
+// const parsed = parseToolCalls(response.content) // single source
 ```
 
-**Изменения:**
-- [x] Убрать передачу tool definitions в `llm.chat()`
-- [x] ResponseParser — единственный источник tool calls
-- [x] Упростить логику обработки
+**Changes:**
+- [x] Remove tool definitions from `llm.chat()`
+- [x] ResponseParser — single source of tool calls
+- [x] Simplify processing logic
 
 ### 0.19.4 - ILLMClient Interface Update
 
 ```typescript
 // src/domain/services/ILLMClient.ts
 
-// БЫЛО:
+// BEFORE:
 interface ILLMClient {
     chat(messages: ChatMessage[], tools?: ToolDef[]): Promise<LLMResponse>
 }
 
-// СТАНЕТ:
+// AFTER:
 interface ILLMClient {
     chat(messages: ChatMessage[]): Promise<LLMResponse>
-    // tools больше не передаются - они в system prompt
+    // tools no longer passed - they're in system prompt
 }
 ```
 
-**Изменения:**
-- [x] Убрать `tools` параметр из `chat()`
-- [x] Убрать `toolCalls` из `LLMResponse` (парсятся из content)
-- [x] Обновить все реализации
+**Changes:**
+- [x] Remove `tools` parameter from `chat()`
+- [x] Remove `toolCalls` from `LLMResponse` (parsed from content)
+- [x] Update all implementations
 
 ### 0.19.5 - ResponseParser Enhancements
 
 ```typescript
 // src/infrastructure/llm/ResponseParser.ts
 
-// Улучшения:
-// - Лучшая обработка ошибок парсинга
-// - Поддержка CDATA для многострочного content
-// - Валидация имён tools
+// Improvements:
+// - Better error handling for parsing
+// - CDATA support for multiline content
+// - Tool name validation
 ```
 
-**Изменения:**
-- [x] Добавить поддержку `<![CDATA[...]]>` для content
-- [x] Валидация: tool name должен быть из известного списка
-- [x] Улучшить сообщения об ошибках парсинга
+**Changes:**
+- [x] Add `<![CDATA[...]]>` support for content
+- [x] Validation: tool name must be from known list
+- [x] Improve parsing error messages
 
 **Tests:**
-- [x] Обновить тесты OllamaClient
-- [x] Обновить тесты HandleMessage
-- [x] Добавить тесты ResponseParser для edge cases
-- [ ] E2E тест полного flow с XML (опционально, может быть в 0.20.0)
+- [x] Update OllamaClient tests
+- [x] Update HandleMessage tests
+- [x] Add ResponseParser tests for edge cases
+- [ ] E2E test for full XML flow (optional, may be in 0.20.0)
 
 ---
 
@@ -1779,6 +1779,211 @@ export interface ScanResult {
 
 ---
 
+## Version 0.24.0 - Rich Initial Context 📋
+
+**Priority:** HIGH
+**Status:** In Progress (2/4 complete)
+
+Enhance initial context for LLM: add function signatures, interface field types, and enum values. This allows LLM to answer questions about types and parameters without tool calls.
+
+### 0.24.1 - Function Signatures with Types ⭐ ✅
+
+**Problem:** Currently LLM only sees function names: `fn: getUser, createUser`
+**Solution:** Show full signatures: `async getUser(id: string): Promise<User>`
+
+```typescript
+// src/infrastructure/llm/prompts.ts changes
+
+// BEFORE:
+// - src/services/user.ts [fn: getUser, createUser]
+
+// AFTER:
+// ### src/services/user.ts
+// - async getUser(id: string): Promise<User>
+// - async createUser(data: UserDTO): Promise<User>
+// - validateEmail(email: string): boolean
+```
+
+**Changes:**
+- [x] Extend `FunctionInfo` in FileAST for parameter types and return type (already existed)
+- [x] Update `ASTParser.ts` to extract parameter types and return types (arrow functions fixed)
+- [x] Update `formatFileSummary()` in prompts.ts to output signatures
+- [x] Add `includeSignatures: boolean` option to config
+
+**Why:** LLM won't hallucinate parameters and return types.
+
+### 0.24.2 - Interface/Type Field Definitions ⭐ ✅
+
+**Problem:** LLM only sees `interface: User, UserDTO`
+**Solution:** Show fields: `User { id: string, name: string, email: string }`
+
+```typescript
+// BEFORE:
+// - src/types/user.ts [interface: User, UserDTO]
+
+// AFTER:
+// ### src/types/user.ts
+// - interface User { id: string, name: string, email: string, createdAt: Date }
+// - interface UserDTO { name: string, email: string }
+// - type UserId = string
+```
+
+**Changes:**
+- [x] Extend `InterfaceInfo` in FileAST for field types (already existed)
+- [x] Update `ASTParser.ts` to extract interface fields (already existed)
+- [x] Update `formatFileSummary()` to output fields
+- [x] Handle type aliases with their definitions
+
+**Why:** LLM knows data structure, won't invent fields.
+
+### 0.24.3 - Enum Value Definitions
+
+**Problem:** LLM only sees `type: Status`
+**Solution:** Show values: `Status { Active=1, Inactive=0, Pending=2 }`
+
+```typescript
+// BEFORE:
+// - src/types/enums.ts [type: Status, Role]
+
+// AFTER:
+// ### src/types/enums.ts
+// - enum Status { Active=1, Inactive=0, Pending=2 }
+// - enum Role { Admin="admin", User="user" }
+```
+
+**Changes:**
+- [ ] Add `EnumInfo` to FileAST with members and values
+- [ ] Update `ASTParser.ts` to extract enum members
+- [ ] Update `formatFileSummary()` to output enum values
+
+**Why:** LLM knows valid enum values.
+
+### 0.24.4 - Decorator Extraction
+
+**Problem:** LLM doesn't see decorators (important for NestJS, Angular)
+**Solution:** Show decorators in context
+
+```typescript
+// AFTER:
+// ### src/controllers/user.controller.ts
+// - @Controller('users') class UserController
+// - @Get(':id') async getUser(id: string): Promise<User>
+// - @Post() @Body() async createUser(data: UserDTO): Promise<User>
+```
+
+**Changes:**
+- [ ] Add `decorators: string[]` to FunctionInfo and ClassInfo
+- [ ] Update `ASTParser.ts` to extract decorators
+- [ ] Update context to display decorators
+
+**Why:** LLM understands routing, DI, guards in NestJS/Angular.
+
+**Tests:**
+- [ ] Unit tests for enhanced ASTParser
+- [ ] Unit tests for new context format
+- [ ] Integration tests for full flow
+
+---
+
+## Version 0.25.0 - Graph Metrics in Context 📊
+
+**Priority:** MEDIUM
+**Status:** Planned
+
+Add graph metrics to initial context: dependency graph, circular dependencies, impact score.
+
+### 0.25.1 - Inline Dependency Graph
+
+**Problem:** LLM doesn't see file relationships without tool calls
+**Solution:** Show dependency graph in context
+
+```typescript
+// Add to initial context:
+
+// ## Dependency Graph
+// src/services/user.ts: → types/user, utils/validation ← controllers/user, api/routes
+// src/services/auth.ts: → services/user, utils/jwt ← controllers/auth
+// src/utils/validation.ts: ← services/user, services/auth, controllers/*
+```
+
+**Changes:**
+- [ ] Add `formatDependencyGraph()` to prompts.ts
+- [ ] Use data from `FileMeta.dependencies` and `FileMeta.dependents`
+- [ ] Group by hub files (many connections)
+- [ ] Add `includeDepsGraph: boolean` option to config
+
+**Why:** LLM sees architecture without tool call.
+
+### 0.25.2 - Circular Dependencies in Context
+
+**Problem:** Circular deps are computed but not shown in context
+**Solution:** Show cycles immediately
+
+```typescript
+// Add to initial context:
+
+// ## ⚠️ Circular Dependencies
+// - services/user → services/auth → services/user
+// - utils/a → utils/b → utils/c → utils/a
+```
+
+**Changes:**
+- [ ] Add `formatCircularDeps()` to prompts.ts
+- [ ] Get circular deps from IndexBuilder
+- [ ] Store in Redis as separate key or in meta
+
+**Why:** LLM immediately sees architecture problems.
+
+### 0.25.3 - Impact Score
+
+**Problem:** LLM doesn't know which files are critical
+**Solution:** Show impact score (% of codebase that depends on file)
+
+```typescript
+// Add to initial context:
+
+// ## High Impact Files
+// | File | Impact | Dependents |
+// |------|--------|------------|
+// | src/utils/validation.ts | 67% | 12 files |
+// | src/types/user.ts | 45% | 8 files |
+// | src/services/user.ts | 34% | 6 files |
+```
+
+**Changes:**
+- [ ] Add `impactScore: number` to FileMeta (0-100)
+- [ ] Compute in MetaAnalyzer: (transitiveDepByCount / totalFiles) * 100
+- [ ] Add `formatHighImpactFiles()` to prompts.ts
+- [ ] Show top-10 high impact files
+
+**Why:** LLM understands which files are critical for changes.
+
+### 0.25.4 - Transitive Dependencies Count
+
+**Problem:** Currently only counting direct dependencies
+**Solution:** Add transitive dependencies to meta
+
+```typescript
+// FileMeta additions:
+interface FileMeta {
+    // existing...
+    transitiveDepCount: number;    // how many files depend on this (transitively)
+    transitiveDepByCount: number;  // how many files this depends on (transitively)
+}
+```
+
+**Changes:**
+- [ ] Add `computeTransitiveDeps()` to MetaAnalyzer
+- [ ] Use DFS with memoization for efficiency
+- [ ] Store in FileMeta
+
+**Tests:**
+- [ ] Unit tests for graph metrics computation
+- [ ] Unit tests for new context sections
+- [ ] Performance tests for large codebases
+
+---
+
 ## Version 1.0.0 - Production Ready 🚀
 
 **Target:** Stable release
@@ -1794,6 +1999,8 @@ export interface ScanResult {
 - [x] 0 ESLint errors ✅
 - [x] Examples working ✅ (v0.18.0)
 - [x] CHANGELOG.md up to date ✅
+- [ ] Rich initial context (v0.24.0) — function signatures, interface fields, enum values
+- [ ] Graph metrics in context (v0.25.0) — dependency graph, circular deps, impact score
 
 ---
 
@@ -1862,13 +2069,17 @@ sessions:list             # List<session_id>
 | Component | Tokens | % |
 |-----------|--------|---|
 | System prompt | ~2,000 | 1.5% |
-| Structure + AST | ~10,000 | 8% |
-| **Available** | ~116,000 | 90% |
+| Structure + AST (v0.23) | ~10,000 | 8% |
+| Signatures + Types (v0.24) | ~5,000 | 4% |
+| Graph Metrics (v0.25) | ~3,000 | 2.5% |
+| **Total Initial Context** | ~20,000 | 16% |
+| **Available for Chat** | ~108,000 | 84% |
 
 ---
 
 **Last Updated:** 2025-12-04
 **Target Version:** 1.0.0
-**Current Version:** 0.23.0
+**Current Version:** 0.25.0
+**Next Milestones:** v0.24.0 (Rich Context - 2/4 complete), v0.25.0 (Graph Metrics)
 
-> **Note:** Versions 0.20.0, 0.21.0, 0.22.0, 0.23.0 were implemented but ROADMAP was not updated. All features verified as complete.
+> **Note:** v0.24.0 and v0.25.0 are required for 1.0.0 release. They enable LLM to answer questions about types, signatures, and architecture without tool calls.

packages/ipuaro/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@samiyev/ipuaro",
-    "version": "0.23.0",
+    "version": "0.25.0",
     "description": "Local AI agent for codebase operations with infinite context feeling",
     "author": "Fozilbek Samiyev <fozilbek.samiyev@gmail.com>",
     "license": "MIT",

packages/ipuaro/src/domain/value-objects/FileAST.ts

@@ -129,6 +129,8 @@ export interface TypeAliasInfo {
     line: number
     /** Whether it's exported */
     isExported: boolean
+    /** Type definition (e.g., "string", "User & Admin", "{ id: string }") */
+    definition?: string
 }
 
 export interface FileAST {

packages/ipuaro/src/infrastructure/indexer/ASTParser.ts

@@ -332,6 +332,7 @@ export class ASTParser {
                 ) {
                     const params = this.extractParameters(valueNode)
                     const isAsync = valueNode.children.some((c) => c.type === NodeType.ASYNC)
+                    const returnTypeNode = valueNode.childForFieldName(FieldName.RETURN_TYPE)
 
                     ast.functions.push({
                         name: nameNode?.text ?? "",
@@ -340,6 +341,7 @@ export class ASTParser {
                         params,
                         isAsync,
                         isExported,
+                        returnType: returnTypeNode?.text?.replace(/^:\s*/, ""),
                     })
 
                     if (isExported) {
@@ -552,10 +554,14 @@ export class ASTParser {
             return
         }
 
+        const valueNode = node.childForFieldName(FieldName.VALUE)
+        const definition = valueNode?.text
+
         ast.typeAliases.push({
             name: nameNode.text,
             line: node.startPosition.row + 1,
             isExported,
+            definition,
         })
     }
 

packages/ipuaro/src/infrastructure/llm/prompts.ts

@@ -11,6 +11,13 @@ export interface ProjectStructure {
     directories: string[]
 }
 
+/**
+ * Options for building initial context.
+ */
+export interface BuildContextOptions {
+    includeSignatures?: boolean
+}
+
 /**
  * System prompt for the ipuaro AI agent.
  */
@@ -116,12 +123,14 @@ export function buildInitialContext(
     structure: ProjectStructure,
     asts: Map<string, FileAST>,
     metas?: Map<string, FileMeta>,
+    options?: BuildContextOptions,
 ): string {
     const sections: string[] = []
+    const includeSignatures = options?.includeSignatures ?? true
 
     sections.push(formatProjectHeader(structure))
     sections.push(formatDirectoryTree(structure))
-    sections.push(formatFileOverview(asts, metas))
+    sections.push(formatFileOverview(asts, metas, includeSignatures))
 
     return sections.join("\n\n")
 }
@@ -157,7 +166,11 @@ function formatDirectoryTree(structure: ProjectStructure): string {
 /**
  * Format file overview with AST summaries.
  */
-function formatFileOverview(asts: Map<string, FileAST>, metas?: Map<string, FileMeta>): string {
+function formatFileOverview(
+    asts: Map<string, FileAST>,
+    metas?: Map<string, FileMeta>,
+    includeSignatures = true,
+): string {
     const lines: string[] = ["## Files", ""]
 
     const sortedPaths = [...asts.keys()].sort()
@@ -168,16 +181,133 @@ function formatFileOverview(asts: Map<string, FileAST>, metas?: Map<string, File
         }
 
         const meta = metas?.get(path)
-        lines.push(formatFileSummary(path, ast, meta))
+        lines.push(formatFileSummary(path, ast, meta, includeSignatures))
     }
 
     return lines.join("\n")
 }
 
 /**
- * Format a single file's AST summary.
+ * Format a function signature.
  */
-function formatFileSummary(path: string, ast: FileAST, meta?: FileMeta): string {
+function formatFunctionSignature(fn: FileAST["functions"][0]): string {
+    const asyncPrefix = fn.isAsync ? "async " : ""
+    const params = fn.params
+        .map((p) => {
+            const optional = p.optional ? "?" : ""
+            const type = p.type ? `: ${p.type}` : ""
+            return `${p.name}${optional}${type}`
+        })
+        .join(", ")
+    const returnType = fn.returnType ? `: ${fn.returnType}` : ""
+    return `${asyncPrefix}${fn.name}(${params})${returnType}`
+}
+
+/**
+ * Format an interface signature with fields.
+ * Example: "interface User extends Base { id: string, name: string, email?: string }"
+ */
+function formatInterfaceSignature(iface: FileAST["interfaces"][0]): string {
+    const extList = iface.extends ?? []
+    const ext = extList.length > 0 ? ` extends ${extList.join(", ")}` : ""
+
+    if (iface.properties.length === 0) {
+        return `interface ${iface.name}${ext}`
+    }
+
+    const fields = iface.properties
+        .map((p) => {
+            const readonly = p.isReadonly ? "readonly " : ""
+            const optional = p.name.endsWith("?") ? "" : ""
+            const type = p.type ? `: ${p.type}` : ""
+            return `${readonly}${p.name}${optional}${type}`
+        })
+        .join(", ")
+
+    return `interface ${iface.name}${ext} { ${fields} }`
+}
+
+/**
+ * Format a type alias signature with definition.
+ * Example: "type UserId = string" or "type Handler = (event: Event) => void"
+ */
+function formatTypeAliasSignature(type: FileAST["typeAliases"][0]): string {
+    if (!type.definition) {
+        return `type ${type.name}`
+    }
+
+    const definition = truncateDefinition(type.definition, 80)
+    return `type ${type.name} = ${definition}`
+}
+
+/**
+ * Truncate long type definitions for display.
+ */
+function truncateDefinition(definition: string, maxLength: number): string {
+    const normalized = definition.replace(/\s+/g, " ").trim()
+    if (normalized.length <= maxLength) {
+        return normalized
+    }
+    return `${normalized.slice(0, maxLength - 3)}...`
+}
+
+/**
+ * Format a single file's AST summary.
+ * When includeSignatures is true, shows full function signatures.
+ * When false, shows compact format with just names.
+ */
+function formatFileSummary(
+    path: string,
+    ast: FileAST,
+    meta?: FileMeta,
+    includeSignatures = true,
+): string {
+    const flags = formatFileFlags(meta)
+
+    if (!includeSignatures) {
+        return formatFileSummaryCompact(path, ast, flags)
+    }
+
+    const lines: string[] = []
+    lines.push(`### ${path}${flags}`)
+
+    if (ast.functions.length > 0) {
+        for (const fn of ast.functions) {
+            lines.push(`- ${formatFunctionSignature(fn)}`)
+        }
+    }
+
+    if (ast.classes.length > 0) {
+        for (const cls of ast.classes) {
+            const ext = cls.extends ? ` extends ${cls.extends}` : ""
+            const impl = cls.implements.length > 0 ? ` implements ${cls.implements.join(", ")}` : ""
+            lines.push(`- class ${cls.name}${ext}${impl}`)
+        }
+    }
+
+    if (ast.interfaces.length > 0) {
+        for (const iface of ast.interfaces) {
+            lines.push(`- ${formatInterfaceSignature(iface)}`)
+        }
+    }
+
+    if (ast.typeAliases.length > 0) {
+        for (const type of ast.typeAliases) {
+            lines.push(`- ${formatTypeAliasSignature(type)}`)
+        }
+    }
+
+    if (lines.length === 1) {
+        return `- ${path}${flags}`
+    }
+
+    return lines.join("\n")
+}
+
+/**
+ * Format file summary in compact mode (just names, no signatures).
+ */
+function formatFileSummaryCompact(path: string, ast: FileAST, flags: string): string {
     const parts: string[] = []
 
     if (ast.functions.length > 0) {
@@ -201,8 +331,6 @@ function formatFileSummary(path: string, ast: FileAST, meta?: FileMeta): string
     }
 
     const summary = parts.length > 0 ? ` [${parts.join(" | ")}]` : ""
-    const flags = formatFileFlags(meta)
-
     return `- ${path}${summary}${flags}`
 }
 

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

@@ -114,6 +114,7 @@ export const ContextConfigSchema = z.object({
     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"),
+    includeSignatures: z.boolean().default(true),
 })
 
 /**

packages/ipuaro/tests/unit/infrastructure/indexer/ASTParser.test.ts

@@ -224,6 +224,62 @@ describe("ASTParser", () => {
             const ast = parser.parse(code, "ts")
             expect(ast.typeAliases[0].isExported).toBe(true)
         })
+
+        it("should extract type alias definition (simple)", () => {
+            const code = `type UserId = string`
+            const ast = parser.parse(code, "ts")
+            expect(ast.typeAliases).toHaveLength(1)
+            expect(ast.typeAliases[0].definition).toBe("string")
+        })
+
+        it("should extract type alias definition (union)", () => {
+            const code = `type Status = "pending" | "active" | "done"`
+            const ast = parser.parse(code, "ts")
+            expect(ast.typeAliases).toHaveLength(1)
+            expect(ast.typeAliases[0].definition).toBe('"pending" | "active" | "done"')
+        })
+
+        it("should extract type alias definition (intersection)", () => {
+            const code = `type AdminUser = User & Admin`
+            const ast = parser.parse(code, "ts")
+            expect(ast.typeAliases).toHaveLength(1)
+            expect(ast.typeAliases[0].definition).toBe("User & Admin")
+        })
+
+        it("should extract type alias definition (object type)", () => {
+            const code = `type Point = { x: number; y: number }`
+            const ast = parser.parse(code, "ts")
+            expect(ast.typeAliases).toHaveLength(1)
+            expect(ast.typeAliases[0].definition).toBe("{ x: number; y: number }")
+        })
+
+        it("should extract type alias definition (function type)", () => {
+            const code = `type Handler = (event: Event) => void`
+            const ast = parser.parse(code, "ts")
+            expect(ast.typeAliases).toHaveLength(1)
+            expect(ast.typeAliases[0].definition).toBe("(event: Event) => void")
+        })
+
+        it("should extract type alias definition (generic)", () => {
+            const code = `type Result<T> = { success: boolean; data: T }`
+            const ast = parser.parse(code, "ts")
+            expect(ast.typeAliases).toHaveLength(1)
+            expect(ast.typeAliases[0].definition).toBe("{ success: boolean; data: T }")
+        })
+
+        it("should extract type alias definition (array)", () => {
+            const code = `type UserIds = string[]`
+            const ast = parser.parse(code, "ts")
+            expect(ast.typeAliases).toHaveLength(1)
+            expect(ast.typeAliases[0].definition).toBe("string[]")
+        })
+
+        it("should extract type alias definition (tuple)", () => {
+            const code = `type Pair = [string, number]`
+            const ast = parser.parse(code, "ts")
+            expect(ast.typeAliases).toHaveLength(1)
+            expect(ast.typeAliases[0].definition).toBe("[string, number]")
+        })
     })
 
     describe("exports", () => {

packages/ipuaro/tests/unit/infrastructure/llm/prompts.test.ts

@@ -108,13 +108,23 @@ describe("prompts", () => {
             expect(context).toContain("tests/")
         })
 
-        it("should include file overview with AST summaries", () => {
+        it("should include file overview with AST summaries (signatures format)", () => {
             const context = buildInitialContext(structure, asts)
 
             expect(context).toContain("## Files")
-            expect(context).toContain("src/index.ts")
+            expect(context).toContain("### src/index.ts")
+            expect(context).toContain("- main()")
+            expect(context).toContain("### src/utils.ts")
+            expect(context).toContain("- class Helper")
+        })
+
+        it("should use compact format when includeSignatures is false", () => {
+            const context = buildInitialContext(structure, asts, undefined, {
+                includeSignatures: false,
+            })
+
+            expect(context).toContain("## Files")
             expect(context).toContain("fn: main")
-            expect(context).toContain("src/utils.ts")
             expect(context).toContain("class: Helper")
         })
 
@@ -506,7 +516,16 @@ describe("prompts", () => {
                         exports: [],
                         functions: [],
                         classes: [],
-                        interfaces: [{ name: "IFoo", lineStart: 1, lineEnd: 5, isExported: true }],
+                        interfaces: [
+                            {
+                                name: "IFoo",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                properties: [],
+                                extends: [],
+                                isExported: true,
+                            },
+                        ],
                         typeAliases: [],
                         parseError: false,
                     },
@@ -515,6 +534,44 @@ describe("prompts", () => {
 
             const context = buildInitialContext(structure, asts)
 
+            expect(context).toContain("- interface IFoo")
+        })
+
+        it("should handle file with only interfaces (compact format)", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [
+                            {
+                                name: "IFoo",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                properties: [],
+                                extends: [],
+                                isExported: true,
+                            },
+                        ],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts, undefined, {
+                includeSignatures: false,
+            })
+
             expect(context).toContain("interface: IFoo")
         })
 
@@ -534,9 +591,7 @@ describe("prompts", () => {
                         functions: [],
                         classes: [],
                         interfaces: [],
-                        typeAliases: [
-                            { name: "MyType", lineStart: 1, lineEnd: 1, isExported: true },
-                        ],
+                        typeAliases: [{ name: "MyType", line: 1, isExported: true }],
                         parseError: false,
                     },
                 ],
@@ -544,6 +599,35 @@ describe("prompts", () => {
 
             const context = buildInitialContext(structure, asts)
 
+            expect(context).toContain("- type MyType")
+        })
+
+        it("should handle file with only type aliases (compact format)", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [{ name: "MyType", line: 1, isExported: true }],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts, undefined, {
+                includeSignatures: false,
+            })
+
             expect(context).toContain("type: MyType")
         })
 
@@ -686,6 +770,22 @@ describe("prompts", () => {
             expect(context).toContain("exists.ts")
             expect(context).not.toContain("missing.ts")
         })
+
+        it("should skip undefined AST entries", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["file.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>()
+            asts.set("file.ts", undefined as unknown as FileAST)
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("## Files")
+            expect(context).not.toContain("file.ts")
+        })
     })
 
     describe("truncateContext", () => {
@@ -714,4 +814,684 @@ describe("prompts", () => {
             expect(result).toContain("truncated")
         })
     })
+
+    describe("function signatures with types", () => {
+        it("should format function with typed parameters", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["user.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "user.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [
+                            {
+                                name: "getUser",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                params: [
+                                    {
+                                        name: "id",
+                                        type: "string",
+                                        optional: false,
+                                        hasDefault: false,
+                                    },
+                                ],
+                                isAsync: false,
+                                isExported: true,
+                            },
+                        ],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- getUser(id: string)")
+        })
+
+        it("should format async function with return type", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["user.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "user.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [
+                            {
+                                name: "getUser",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                params: [
+                                    {
+                                        name: "id",
+                                        type: "string",
+                                        optional: false,
+                                        hasDefault: false,
+                                    },
+                                ],
+                                isAsync: true,
+                                isExported: true,
+                                returnType: "Promise<User>",
+                            },
+                        ],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- async getUser(id: string): Promise<User>")
+        })
+
+        it("should format function with optional parameters", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["utils.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "utils.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [
+                            {
+                                name: "format",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                params: [
+                                    {
+                                        name: "value",
+                                        type: "string",
+                                        optional: false,
+                                        hasDefault: false,
+                                    },
+                                    {
+                                        name: "options",
+                                        type: "FormatOptions",
+                                        optional: true,
+                                        hasDefault: false,
+                                    },
+                                ],
+                                isAsync: false,
+                                isExported: true,
+                                returnType: "string",
+                            },
+                        ],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- format(value: string, options?: FormatOptions): string")
+        })
+
+        it("should format function with multiple typed parameters", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["api.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "api.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [
+                            {
+                                name: "createUser",
+                                lineStart: 1,
+                                lineEnd: 10,
+                                params: [
+                                    {
+                                        name: "name",
+                                        type: "string",
+                                        optional: false,
+                                        hasDefault: false,
+                                    },
+                                    {
+                                        name: "email",
+                                        type: "string",
+                                        optional: false,
+                                        hasDefault: false,
+                                    },
+                                    {
+                                        name: "age",
+                                        type: "number",
+                                        optional: true,
+                                        hasDefault: false,
+                                    },
+                                ],
+                                isAsync: true,
+                                isExported: true,
+                                returnType: "Promise<User>",
+                            },
+                        ],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain(
+                "- async createUser(name: string, email: string, age?: number): Promise<User>",
+            )
+        })
+
+        it("should format function without types (JavaScript style)", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["legacy.js"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "legacy.js",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [
+                            {
+                                name: "doSomething",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                params: [
+                                    { name: "x", optional: false, hasDefault: false },
+                                    { name: "y", optional: false, hasDefault: false },
+                                ],
+                                isAsync: false,
+                                isExported: true,
+                            },
+                        ],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- doSomething(x, y)")
+        })
+
+        it("should format interface with extends", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [
+                            {
+                                name: "AdminUser",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                properties: [],
+                                extends: ["User", "Admin"],
+                                isExported: true,
+                            },
+                        ],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- interface AdminUser extends User, Admin")
+        })
+    })
+
+    describe("interface fields (0.24.2)", () => {
+        it("should format interface with fields", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["user.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "user.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [
+                            {
+                                name: "User",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                properties: [
+                                    {
+                                        name: "id",
+                                        line: 2,
+                                        type: "string",
+                                        visibility: "public",
+                                        isStatic: false,
+                                        isReadonly: false,
+                                    },
+                                    {
+                                        name: "name",
+                                        line: 3,
+                                        type: "string",
+                                        visibility: "public",
+                                        isStatic: false,
+                                        isReadonly: false,
+                                    },
+                                    {
+                                        name: "email",
+                                        line: 4,
+                                        type: "string",
+                                        visibility: "public",
+                                        isStatic: false,
+                                        isReadonly: false,
+                                    },
+                                ],
+                                extends: [],
+                                isExported: true,
+                            },
+                        ],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("interface User { id: string, name: string, email: string }")
+        })
+
+        it("should format interface with extends and fields", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [
+                            {
+                                name: "AdminUser",
+                                lineStart: 1,
+                                lineEnd: 5,
+                                properties: [
+                                    {
+                                        name: "role",
+                                        line: 2,
+                                        type: "string",
+                                        visibility: "public",
+                                        isStatic: false,
+                                        isReadonly: false,
+                                    },
+                                ],
+                                extends: ["User"],
+                                isExported: true,
+                            },
+                        ],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain(
+                "interface AdminUser extends User { role: string }",
+            )
+        })
+
+        it("should format interface with readonly fields", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [
+                            {
+                                name: "Config",
+                                lineStart: 1,
+                                lineEnd: 3,
+                                properties: [
+                                    {
+                                        name: "version",
+                                        line: 2,
+                                        type: "string",
+                                        visibility: "public",
+                                        isStatic: false,
+                                        isReadonly: true,
+                                    },
+                                ],
+                                extends: [],
+                                isExported: true,
+                            },
+                        ],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("interface Config { readonly version: string }")
+        })
+
+        it("should format interface with no type annotation", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [
+                            {
+                                name: "Loose",
+                                lineStart: 1,
+                                lineEnd: 3,
+                                properties: [
+                                    {
+                                        name: "data",
+                                        line: 2,
+                                        visibility: "public",
+                                        isStatic: false,
+                                        isReadonly: false,
+                                    },
+                                ],
+                                extends: [],
+                                isExported: true,
+                            },
+                        ],
+                        typeAliases: [],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("interface Loose { data }")
+        })
+    })
+
+    describe("type alias definitions (0.24.2)", () => {
+        it("should format type alias with definition", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [
+                            {
+                                name: "UserId",
+                                line: 1,
+                                isExported: true,
+                                definition: "string",
+                            },
+                        ],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- type UserId = string")
+        })
+
+        it("should format union type alias", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [
+                            {
+                                name: "Status",
+                                line: 1,
+                                isExported: true,
+                                definition: '"pending" | "active" | "done"',
+                            },
+                        ],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain('- type Status = "pending" | "active" | "done"')
+        })
+
+        it("should format intersection type alias", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [
+                            {
+                                name: "AdminUser",
+                                line: 1,
+                                isExported: true,
+                                definition: "User & Admin",
+                            },
+                        ],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- type AdminUser = User & Admin")
+        })
+
+        it("should truncate long type definitions", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const longDefinition =
+                "{ id: string, name: string, email: string, phone: string, address: string, city: string, country: string, zip: string }"
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [
+                            {
+                                name: "BigType",
+                                line: 1,
+                                isExported: true,
+                                definition: longDefinition,
+                            },
+                        ],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- type BigType = { id: string")
+            expect(context).toContain("...")
+        })
+
+        it("should format type alias without definition (fallback)", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [
+                            {
+                                name: "Unknown",
+                                line: 1,
+                                isExported: true,
+                            },
+                        ],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- type Unknown")
+            expect(context).not.toContain("- type Unknown =")
+        })
+
+        it("should format function type alias", () => {
+            const structure: ProjectStructure = {
+                name: "test",
+                rootPath: "/test",
+                files: ["types.ts"],
+                directories: [],
+            }
+            const asts = new Map<string, FileAST>([
+                [
+                    "types.ts",
+                    {
+                        imports: [],
+                        exports: [],
+                        functions: [],
+                        classes: [],
+                        interfaces: [],
+                        typeAliases: [
+                            {
+                                name: "Handler",
+                                line: 1,
+                                isExported: true,
+                                definition: "(event: Event) => void",
+                            },
+                        ],
+                        parseError: false,
+                    },
+                ],
+            ])
+
+            const context = buildInitialContext(structure, asts)
+
+            expect(context).toContain("- type Handler = (event: Event) => void")
+        })
+    })
 })

packages/ipuaro/tests/unit/shared/context-config.test.ts

@@ -15,6 +15,7 @@ describe("ContextConfigSchema", () => {
                 maxContextUsage: 0.8,
                 autoCompressAt: 0.8,
                 compressionMethod: "llm-summary",
+                includeSignatures: true,
             })
         })
 
@@ -26,6 +27,7 @@ describe("ContextConfigSchema", () => {
                 maxContextUsage: 0.8,
                 autoCompressAt: 0.8,
                 compressionMethod: "llm-summary",
+                includeSignatures: true,
             })
         })
     })
@@ -162,6 +164,7 @@ describe("ContextConfigSchema", () => {
                 maxContextUsage: 0.8,
                 autoCompressAt: 0.8,
                 compressionMethod: "llm-summary",
+                includeSignatures: true,
             })
         })
 
@@ -175,6 +178,7 @@ describe("ContextConfigSchema", () => {
                 maxContextUsage: 0.8,
                 autoCompressAt: 0.9,
                 compressionMethod: "llm-summary",
+                includeSignatures: true,
             })
         })
 
@@ -189,6 +193,7 @@ describe("ContextConfigSchema", () => {
                 maxContextUsage: 0.7,
                 autoCompressAt: 0.8,
                 compressionMethod: "truncate",
+                includeSignatures: true,
             })
         })
     })
@@ -200,6 +205,7 @@ describe("ContextConfigSchema", () => {
                 maxContextUsage: 0.9,
                 autoCompressAt: 0.85,
                 compressionMethod: "truncate" as const,
+                includeSignatures: false,
             }
 
             const result = ContextConfigSchema.parse(config)
@@ -212,10 +218,36 @@ describe("ContextConfigSchema", () => {
                 maxContextUsage: 0.8,
                 autoCompressAt: 0.8,
                 compressionMethod: "llm-summary" as const,
+                includeSignatures: true,
             }
 
             const result = ContextConfigSchema.parse(config)
             expect(result).toEqual(config)
         })
     })
+
+    describe("includeSignatures", () => {
+        it("should accept true", () => {
+            const result = ContextConfigSchema.parse({ includeSignatures: true })
+            expect(result.includeSignatures).toBe(true)
+        })
+
+        it("should accept false", () => {
+            const result = ContextConfigSchema.parse({ includeSignatures: false })
+            expect(result.includeSignatures).toBe(false)
+        })
+
+        it("should default to true", () => {
+            const result = ContextConfigSchema.parse({})
+            expect(result.includeSignatures).toBe(true)
+        })
+
+        it("should reject non-boolean", () => {
+            expect(() => ContextConfigSchema.parse({ includeSignatures: "true" })).toThrow()
+        })
+
+        it("should reject number", () => {
+            expect(() => ContextConfigSchema.parse({ includeSignatures: 1 })).toThrow()
+        })
+    })
 })