diff --git a/templates/commands/plan.md b/templates/commands/plan.md
index 147da0afa0..00e83eabd0 100644
--- a/templates/commands/plan.md
+++ b/templates/commands/plan.md
@@ -75,10 +75,11 @@ You **MUST** consider the user input before proceeding (if not empty).
    - Validation rules from requirements
    - State transitions if applicable
 
-2. **Generate API contracts** from functional requirements:
-   - For each user action → endpoint
-   - Use standard REST/GraphQL patterns
-   - Output OpenAPI/GraphQL schema to `/contracts/`
+2. **Define interface contracts** (if project has external interfaces) → `/contracts/`:
+   - Identify what interfaces the project exposes to users or other systems
+   - Document the contract format appropriate for the project type
+   - Examples: public APIs for libraries, command schemas for CLI tools, endpoints for web services, grammars for parsers, UI contracts for applications
+   - Skip if project is purely internal (build scripts, one-off tools, etc.)
 
 3. **Agent context update**:
    - Run `{AGENT_SCRIPT}`
diff --git a/templates/commands/specify.md b/templates/commands/specify.md
index 3c952d683e..5fd4489eee 100644
--- a/templates/commands/specify.md
+++ b/templates/commands/specify.md
@@ -235,7 +235,7 @@ When creating this spec from a user prompt:
 - Performance targets: Standard web/mobile app expectations unless specified
 - Error handling: User-friendly messages with appropriate fallbacks
 - Authentication method: Standard session-based or OAuth2 for web apps
-- Integration patterns: RESTful APIs unless specified otherwise
+- Integration patterns: Use project-appropriate patterns (REST/GraphQL for web services, function calls for libraries, CLI args for tools, etc.)
 
 ### Success Criteria Guidelines
 
diff --git a/templates/commands/tasks.md b/templates/commands/tasks.md
index d69d43763e..7320b6f305 100644
--- a/templates/commands/tasks.md
+++ b/templates/commands/tasks.md
@@ -28,14 +28,14 @@ You **MUST** consider the user input before proceeding (if not empty).
 
 2. **Load design documents**: Read from FEATURE_DIR:
    - **Required**: plan.md (tech stack, libraries, structure), spec.md (user stories with priorities)
-   - **Optional**: data-model.md (entities), contracts/ (API endpoints), research.md (decisions), quickstart.md (test scenarios)
+   - **Optional**: data-model.md (entities), contracts/ (interface contracts), research.md (decisions), quickstart.md (test scenarios)
    - Note: Not all projects have all documents. Generate tasks based on what's available.
 
 3. **Execute task generation workflow**:
    - Load plan.md and extract tech stack, libraries, project structure
    - Load spec.md and extract user stories with their priorities (P1, P2, P3, etc.)
    - If data-model.md exists: Extract entities and map to user stories
-   - If contracts/ exists: Map endpoints to user stories
+   - If contracts/ exists: Map interface contracts to user stories
    - If research.md exists: Extract decisions for setup tasks
    - Generate tasks organized by user story (see Task Generation Rules below)
    - Generate dependency graph showing user story completion order
@@ -112,13 +112,13 @@ Every task MUST strictly follow this format:
    - Map all related components to their story:
      - Models needed for that story
      - Services needed for that story
-     - Endpoints/UI needed for that story
+     - Interfaces/UI needed for that story
      - If tests requested: Tests specific to that story
    - Mark story dependencies (most stories should be independent)
 
 2. **From Contracts**:
-   - Map each contract/endpoint → to the user story it serves
-   - If tests requested: Each contract → contract test task [P] before implementation in that story's phase
+   - Map each interface contract → to the user story it serves
+   - If tests requested: Each interface contract → contract test task [P] before implementation in that story's phase
 
 3. **From Data Model**:
    - Map each entity to the user story(ies) that need it
diff --git a/templates/plan-template.md b/templates/plan-template.md
index dd47efceb4..5a2fafebe3 100644
--- a/templates/plan-template.md
+++ b/templates/plan-template.md
@@ -22,7 +22,7 @@
 **Storage**: [if applicable, e.g., PostgreSQL, CoreData, files or N/A]  
 **Testing**: [e.g., pytest, XCTest, cargo test or NEEDS CLARIFICATION]  
 **Target Platform**: [e.g., Linux server, iOS 15+, WASM or NEEDS CLARIFICATION]
-**Project Type**: [single/web/mobile - determines source structure]  
+**Project Type**: [e.g., library/cli/web-service/mobile-app/compiler/desktop-app or NEEDS CLARIFICATION]  
 **Performance Goals**: [domain-specific, e.g., 1000 req/s, 10k lines/sec, 60 fps or NEEDS CLARIFICATION]  
 **Constraints**: [domain-specific, e.g., <200ms p95, <100MB memory, offline-capable or NEEDS CLARIFICATION]  
 **Scale/Scope**: [domain-specific, e.g., 10k users, 1M LOC, 50 screens or NEEDS CLARIFICATION]