feat: Add contract type templates API endpoint

Add a new API endpoint to provide contract type templates (workflow
definitions) separate from file templates. This enables the create
contract page to dynamically show available contract types.

Changes:
- Add ContractTypeTemplate struct in templates.rs with id, name,
  description, phases, default_phase, and is_builtin fields
- Add built-in contract types: 'simple' (plan/execute) and
  'specification' (research/specify/plan/execute/review)
- Add GET /api/v1/contract-types endpoint returning all contract types
- Add frontend ContractTypeTemplate interface and listContractTypes()
  API function

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

4 files changed, 134 insertions, 0 deletions

diff --git a/makima/frontend/src/lib/api.ts b/makima/frontend/src/lib/api.ts
index 76ee4d4..1ae4103 100644
--- a/makima/frontend/src/lib/api.ts
+++ b/makima/frontend/src/lib/api.ts
@@ -2008,6 +2008,42 @@ export async function getTemplate(id: string): Promise<FileTemplate> {
 }
 
 // =============================================================================
+// Contract Type Templates (Workflow Definitions)
+// =============================================================================
+
+/** A contract type template defining a workflow */
+export interface ContractTypeTemplate {
+  /** Unique identifier (e.g., 'simple', 'specification', 'feature-development') */
+  id: string;
+  /** Display name */
+  name: string;
+  /** What this contract type is for */
+  description: string;
+  /** Ordered list of phases in the workflow */
+  phases: string[];
+  /** Starting phase */
+  defaultPhase: string;
+  /** True for built-in types ('simple', 'specification') */
+  isBuiltin: boolean;
+}
+
+export interface ListContractTypesResponse {
+  contractTypes: ContractTypeTemplate[];
+}
+
+/**
+ * List all available contract type templates.
+ * Returns built-in types (simple, specification) and any custom types.
+ */
+export async function listContractTypes(): Promise<ListContractTypesResponse> {
+  const res = await authFetch(`${API_BASE}/api/v1/contract-types`);
+  if (!res.ok) {
+    throw new Error(`Failed to list contract types: ${res.statusText}`);
+  }
+  return res.json();
+}
+
+// =============================================================================
 // Supervisor Question Types and Functions
 // =============================================================================
 
diff --git a/makima/src/llm/templates.rs b/makima/src/llm/templates.rs
index 18ef46d..7a5bd38 100644
--- a/makima/src/llm/templates.rs
+++ b/makima/src/llm/templates.rs
@@ -8,6 +8,71 @@ use utoipa::ToSchema;
 
 use crate::db::models::BodyElement;
 
+// =============================================================================
+// Contract Type Templates (Workflow Definitions)
+// =============================================================================
+
+/// A contract type template defining a workflow
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+#[serde(rename_all = "camelCase")]
+pub struct ContractTypeTemplate {
+    /// Unique identifier (e.g., 'simple', 'specification', 'feature-development')
+    pub id: String,
+    /// Display name
+    pub name: String,
+    /// What this contract type is for
+    pub description: String,
+    /// Ordered list of phases in the workflow
+    pub phases: Vec<String>,
+    /// Starting phase
+    pub default_phase: String,
+    /// True for built-in types ('simple', 'specification')
+    pub is_builtin: bool,
+}
+
+/// Get all available contract type templates
+pub fn all_contract_types() -> Vec<ContractTypeTemplate> {
+    vec![
+        simple_contract_type(),
+        specification_contract_type(),
+    ]
+}
+
+/// Simple contract type with basic plan/execute workflow
+fn simple_contract_type() -> ContractTypeTemplate {
+    ContractTypeTemplate {
+        id: "simple".to_string(),
+        name: "Simple".to_string(),
+        description: "A basic workflow for straightforward tasks with planning and execution phases."
+            .to_string(),
+        phases: vec!["plan".to_string(), "execute".to_string()],
+        default_phase: "plan".to_string(),
+        is_builtin: true,
+    }
+}
+
+/// Specification contract type with full research-to-review workflow
+fn specification_contract_type() -> ContractTypeTemplate {
+    ContractTypeTemplate {
+        id: "specification".to_string(),
+        name: "Specification".to_string(),
+        description: "A comprehensive workflow for complex projects requiring research, specification, planning, execution, and review.".to_string(),
+        phases: vec![
+            "research".to_string(),
+            "specify".to_string(),
+            "plan".to_string(),
+            "execute".to_string(),
+            "review".to_string(),
+        ],
+        default_phase: "research".to_string(),
+        is_builtin: true,
+    }
+}
+
+// =============================================================================
+// File Templates
+// =============================================================================
+
 /// A file template with suggested structure
 #[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
 pub struct FileTemplate {
diff --git a/makima/src/server/handlers/templates.rs b/makima/src/server/handlers/templates.rs
index 868d5b4..6d95e86 100644
--- a/makima/src/server/handlers/templates.rs
+++ b/makima/src/server/handlers/templates.rs
@@ -5,6 +5,7 @@ use serde::{Deserialize, Serialize};
 use utoipa::ToSchema;
 
 use crate::llm::templates;
+use crate::llm::templates::ContractTypeTemplate;
 
 /// Query parameters for listing templates
 #[derive(Debug, Deserialize, ToSchema)]
@@ -105,3 +106,33 @@ pub async fn get_template(
             .into_response(),
     }
 }
+
+// =============================================================================
+// Contract Type Templates (Workflow Definitions)
+// =============================================================================
+
+/// Response for listing contract types
+#[derive(Debug, Serialize, ToSchema)]
+#[serde(rename_all = "camelCase")]
+pub struct ListContractTypesResponse {
+    pub contract_types: Vec<ContractTypeTemplate>,
+}
+
+/// List all available contract type templates
+#[utoipa::path(
+    get,
+    path = "/api/v1/contract-types",
+    responses(
+        (status = 200, description = "Contract types retrieved successfully", body = ListContractTypesResponse)
+    ),
+    tag = "templates"
+)]
+pub async fn list_contract_types() -> impl IntoResponse {
+    let contract_types = templates::all_contract_types();
+
+    (
+        StatusCode::OK,
+        Json(ListContractTypesResponse { contract_types }),
+    )
+        .into_response()
+}
diff --git a/makima/src/server/mod.rs b/makima/src/server/mod.rs
index de20569..75f64c6 100644
--- a/makima/src/server/mod.rs
+++ b/makima/src/server/mod.rs
@@ -208,6 +208,8 @@ pub fn make_router(state: SharedState) -> Router {
         // Template endpoints
         .route("/templates", get(templates::list_templates))
         .route("/templates/{id}", get(templates::get_template))
+        // Contract type templates (workflow definitions)
+        .route("/contract-types", get(templates::list_contract_types))
         // Settings endpoints
         .route(
             "/settings/repository-history",