1 files changed, 42 insertions, 2 deletions
diff --git a/makima/frontend/src/lib/api.ts b/makima/frontend/src/lib/api.ts
index e5cf1d8..a08cba7 100644
--- a/makima/frontend/src/lib/api.ts
+++ b/makima/frontend/src/lib/api.ts
@@ -3255,6 +3255,20 @@ export interface ChainDeliverableDefinition {
   priority?: string;
 }
 
+/** Validation configuration for checkpoint contracts */
+export interface CheckpointValidation {
+  /** Check that all required deliverables from upstream contracts exist */
+  checkDeliverables?: boolean;
+  /** Run tests in the repository */
+  runTests?: boolean;
+  /** Custom validation instructions for Claude */
+  checkContent?: string;
+  /** Action on failure: "block", "retry", "warn" */
+  onFailure?: "block" | "retry" | "warn";
+  /** Max retry attempts for upstream contracts */
+  maxRetries?: number;
+}
+
 /** Contract definition stored in chain (before actual contract is created) */
 export interface ChainContractDefinition {
   id: string;
@@ -3266,6 +3280,8 @@ export interface ChainContractDefinition {
   dependsOnNames: string[];
   tasks: ChainTaskDefinition[] | null;
   deliverables: ChainDeliverableDefinition[] | null;
+  /** Validation config for checkpoint contracts */
+  validation: CheckpointValidation | null;
   editorX: number | null;
   editorY: number | null;
   orderIndex: number;
@@ -3281,6 +3297,8 @@ export interface AddContractDefinitionRequest {
   dependsOn?: string[];
   tasks?: ChainTaskDefinition[];
   deliverables?: ChainDeliverableDefinition[];
+  /** Validation config (for checkpoint contracts) */
+  validation?: CheckpointValidation;
   editorX?: number;
   editorY?: number;
   orderIndex?: number;
@@ -3295,6 +3313,8 @@ export interface UpdateContractDefinitionRequest {
   dependsOn?: string[];
   tasks?: ChainTaskDefinition[];
   deliverables?: ChainDeliverableDefinition[];
+  /** Validation config (for checkpoint contracts) */
+  validation?: CheckpointValidation;
   editorX?: number;
   editorY?: number;
   orderIndex?: number;
@@ -3402,10 +3422,30 @@ export async function getChainDefinitionGraph(
   return res.json();
 }
 
-/** Start a chain (creates root contracts and spawns supervisor) */
-export async function startChain(chainId: string): Promise<StartChainResponse> {
+/** Options for starting a chain */
+export interface StartChainOptions {
+  /** Whether to create a supervisor task that monitors chain progress */
+  withSupervisor?: boolean;
+  /** Repository URL for the supervisor task to work with */
+  repositoryUrl?: string;
+}
+
+/** Start a chain (creates root contracts and optionally spawns supervisor) */
+export async function startChain(
+  chainId: string,
+  options?: StartChainOptions
+): Promise<StartChainResponse> {
+  const body = options
+    ? JSON.stringify({
+        withSupervisor: options.withSupervisor ?? false,
+        repositoryUrl: options.repositoryUrl,
+      })
+    : undefined;
+
   const res = await authFetch(`${API_BASE}/api/v1/chains/${chainId}/start`, {
     method: "POST",
+    headers: body ? { "Content-Type": "application/json" } : undefined,
+    body,
   });
   if (!res.ok) {
     const error = await res.json().catch(() => ({ message: res.statusText }));