diff --git a/packages/workflow-executor/src/build-workflow-executor.ts b/packages/workflow-executor/src/build-workflow-executor.ts
index dbb6f64cf5..c5f44cd43c 100644
--- a/packages/workflow-executor/src/build-workflow-executor.ts
+++ b/packages/workflow-executor/src/build-workflow-executor.ts
@@ -17,6 +17,7 @@ import {
   DEFAULT_AI_INVOKE_TIMEOUT_MS,
   DEFAULT_FOREST_SERVER_URL,
   DEFAULT_POLLING_INTERVAL_MS,
+  DEFAULT_SCHEMA_CACHE_TTL_MS,
   DEFAULT_STEP_TIMEOUT_MS,
 } from './defaults';
 import ExecutorHttpServer from './http/executor-http-server';
@@ -47,6 +48,8 @@ export interface ExecutorOptions {
   aiInvokeTimeoutMs?: number;
   // Max auto-chained steps per entry (see RunnerConfig.maxChainDepth). 0 disables chaining.
   maxChainDepth?: number;
+  // Collection schema cache TTL in ms. Lower it to pick up orchestrator schema changes sooner.
+  schemaCacheTtlMs?: number;
   // Dev only: makes every AI call fail immediately so error paths can be exercised locally.
   forceAiError?: boolean;
 }
@@ -91,7 +94,10 @@ function buildCommonDependencies(options: ExecutorOptions) {
     aiModelPort = new ServerAiAdapter({ forestServerUrl, envSecret: options.envSecret });
   }
 
-  const schemaCache = new SchemaCache();
+  // A TTL of 0/negative/non-finite would silently make the cache always-stale, so fall back.
+  const schemaCache = new SchemaCache(
+    positiveOrDefault(options.schemaCacheTtlMs, DEFAULT_SCHEMA_CACHE_TTL_MS),
+  );
 
   const agentPort = new AgentClientAgentPort({
     agentUrl: options.agentUrl,
diff --git a/packages/workflow-executor/src/cli-core.ts b/packages/workflow-executor/src/cli-core.ts
index 88e1458ff5..6d4e442a74 100644
--- a/packages/workflow-executor/src/cli-core.ts
+++ b/packages/workflow-executor/src/cli-core.ts
@@ -18,6 +18,7 @@ import {
   DEFAULT_HTTP_PORT,
   DEFAULT_MAX_CHAIN_DEPTH,
   DEFAULT_POLLING_INTERVAL_MS,
+  DEFAULT_SCHEMA_CACHE_TTL_MS,
   DEFAULT_STEP_TIMEOUT_MS,
   DEFAULT_STOP_TIMEOUT_MS,
 } from './defaults';
@@ -161,6 +162,7 @@ export function readEnvConfig(env: NodeJS.ProcessEnv, args: CliArgs): CliConfig
     stepTimeoutMs: parsePositiveIntEnv('STEP_TIMEOUT_MS', env.STEP_TIMEOUT_MS),
     aiInvokeTimeoutMs: parsePositiveIntEnv('AI_INVOKE_TIMEOUT_MS', env.AI_INVOKE_TIMEOUT_MS),
     maxChainDepth: parsePositiveIntEnv('MAX_CHAIN_DEPTH', env.MAX_CHAIN_DEPTH),
+    schemaCacheTtlMs: parsePositiveIntEnv('SCHEMA_CACHE_TTL_MS', env.SCHEMA_CACHE_TTL_MS),
     ...(aiConfigurations && { aiConfigurations }),
     ...(env.FORCE_AI_ERROR === 'true' && { forceAiError: true }),
   };
@@ -198,6 +200,7 @@ Optional environment variables:
   STEP_TIMEOUT_MS        Max duration of a step in ms (default: ${DEFAULT_STEP_TIMEOUT_MS})
   AI_INVOKE_TIMEOUT_MS   Max duration of a single AI provider invocation in ms (default: ${DEFAULT_AI_INVOKE_TIMEOUT_MS})
   MAX_CHAIN_DEPTH        Max steps auto-executed per run before yielding (default: ${DEFAULT_MAX_CHAIN_DEPTH})
+  SCHEMA_CACHE_TTL_MS    Collection schema cache TTL in ms (default: ${DEFAULT_SCHEMA_CACHE_TTL_MS})
   NO_COLOR               Set to any value to disable ANSI colors in pretty logs
   FORCE_AI_ERROR         Set to "true" to make every AI call fail (dev only, to test error paths)
 
diff --git a/packages/workflow-executor/src/defaults.ts b/packages/workflow-executor/src/defaults.ts
index 746077301f..b0e9784dda 100644
--- a/packages/workflow-executor/src/defaults.ts
+++ b/packages/workflow-executor/src/defaults.ts
@@ -5,3 +5,4 @@ export const DEFAULT_STEP_TIMEOUT_MS = 5 * 60_000;
 export const DEFAULT_AI_INVOKE_TIMEOUT_MS = 30_000;
 export const DEFAULT_STOP_TIMEOUT_MS = 30_000;
 export const DEFAULT_MAX_CHAIN_DEPTH = 50;
+export const DEFAULT_SCHEMA_CACHE_TTL_MS = 10 * 60_000;
diff --git a/packages/workflow-executor/src/schema-cache.ts b/packages/workflow-executor/src/schema-cache.ts
index 68b1a3db0b..d6f04056e7 100644
--- a/packages/workflow-executor/src/schema-cache.ts
+++ b/packages/workflow-executor/src/schema-cache.ts
@@ -1,13 +1,13 @@
 import type { CollectionSchema } from './types/validated/collection';
 
-const DEFAULT_TTL_MS = 10 * 60 * 1000; // 10 minutes
+import { DEFAULT_SCHEMA_CACHE_TTL_MS } from './defaults';
 
 export default class SchemaCache {
   private readonly store = new Map<string, { schema: CollectionSchema; fetchedAt: number }>();
   private readonly ttlMs: number;
   private readonly now: () => number;
 
-  constructor(ttlMs: number = DEFAULT_TTL_MS, now: () => number = Date.now) {
+  constructor(ttlMs: number = DEFAULT_SCHEMA_CACHE_TTL_MS, now: () => number = Date.now) {
     this.ttlMs = ttlMs;
     this.now = now;
   }
diff --git a/packages/workflow-executor/test/build-workflow-executor.test.ts b/packages/workflow-executor/test/build-workflow-executor.test.ts
index 31459263df..8666a691a7 100644
--- a/packages/workflow-executor/test/build-workflow-executor.test.ts
+++ b/packages/workflow-executor/test/build-workflow-executor.test.ts
@@ -1,5 +1,6 @@
 import ForestServerWorkflowPort from '../src/adapters/forest-server-workflow-port';
 import { buildDatabaseExecutor, buildInMemoryExecutor } from '../src/build-workflow-executor';
+import { DEFAULT_SCHEMA_CACHE_TTL_MS } from '../src/defaults';
 import Runner from '../src/runner';
 import SchemaCache from '../src/schema-cache';
 import DatabaseStore from '../src/stores/database-store';
@@ -9,6 +10,7 @@ jest.mock('../src/runner');
 jest.mock('../src/stores/in-memory-store');
 jest.mock('../src/stores/database-store');
 jest.mock('../src/adapters/agent-client-agent-port');
+jest.mock('../src/schema-cache');
 jest.mock('../src/adapters/forest-server-workflow-port');
 jest.mock('../src/http/executor-http-server');
 jest.mock('../src/adapters/ai-client-adapter');
@@ -20,6 +22,7 @@ jest.mock('sequelize', () => ({
 }));
 
 const MockedRunner = Runner as jest.MockedClass<typeof Runner>;
+const MockedSchemaCache = SchemaCache as jest.MockedClass<typeof SchemaCache>;
 
 const BASE_OPTIONS = {
   envSecret: 'a'.repeat(64),
@@ -176,6 +179,25 @@ describe('buildInMemoryExecutor', () => {
     expect(MockedRunner).toHaveBeenCalledWith(expect.objectContaining({ stepTimeoutMs: 30_000 }));
   });
 
+  it('builds the SchemaCache with the default TTL when schemaCacheTtlMs is not configured', () => {
+    buildInMemoryExecutor(BASE_OPTIONS);
+
+    expect(MockedSchemaCache).toHaveBeenCalledWith(DEFAULT_SCHEMA_CACHE_TTL_MS);
+  });
+
+  it('builds the SchemaCache with a caller-provided schemaCacheTtlMs over the default', () => {
+    buildInMemoryExecutor({ ...BASE_OPTIONS, schemaCacheTtlMs: 5_000 });
+
+    expect(MockedSchemaCache).toHaveBeenCalledWith(5_000);
+  });
+
+  it('falls back to the default TTL for a non-positive or non-finite schemaCacheTtlMs', () => {
+    buildInMemoryExecutor({ ...BASE_OPTIONS, schemaCacheTtlMs: 0 });
+
+    // A 0/negative/Infinity TTL must not silently make the cache always-stale.
+    expect(MockedSchemaCache).toHaveBeenCalledWith(DEFAULT_SCHEMA_CACHE_TTL_MS);
+  });
+
   it('falls back to the default timeouts for non-positive or non-finite values', () => {
     buildInMemoryExecutor({
       ...BASE_OPTIONS,
diff --git a/packages/workflow-executor/test/cli.test.ts b/packages/workflow-executor/test/cli.test.ts
index 2a74307cd2..a09b44fb39 100644
--- a/packages/workflow-executor/test/cli.test.ts
+++ b/packages/workflow-executor/test/cli.test.ts
@@ -17,6 +17,7 @@ import {
   DEFAULT_HTTP_PORT,
   DEFAULT_MAX_CHAIN_DEPTH,
   DEFAULT_POLLING_INTERVAL_MS,
+  DEFAULT_SCHEMA_CACHE_TTL_MS,
   DEFAULT_STEP_TIMEOUT_MS,
   DEFAULT_STOP_TIMEOUT_MS,
 } from '../src/defaults';
@@ -141,6 +142,7 @@ describe('readEnvConfig', () => {
         STOP_TIMEOUT_MS: '10000',
         STEP_TIMEOUT_MS: '60000',
         MAX_CHAIN_DEPTH: '10',
+        SCHEMA_CACHE_TTL_MS: '120000',
       },
       args,
     );
@@ -150,6 +152,19 @@ describe('readEnvConfig', () => {
     expect(config.executorOptions.stopTimeoutMs).toBe(10000);
     expect(config.executorOptions.stepTimeoutMs).toBe(60000);
     expect(config.executorOptions.maxChainDepth).toBe(10);
+    expect(config.executorOptions.schemaCacheTtlMs).toBe(120000);
+  });
+
+  it('leaves schemaCacheTtlMs undefined when SCHEMA_CACHE_TTL_MS is unset (default applied downstream in build)', () => {
+    const config = readEnvConfig(baseEnv, args);
+
+    expect(config.executorOptions.schemaCacheTtlMs).toBeUndefined();
+  });
+
+  it('throws ConfigurationError when SCHEMA_CACHE_TTL_MS is non-numeric', () => {
+    expect(() => readEnvConfig({ ...baseEnv, SCHEMA_CACHE_TTL_MS: 'abc' }, args)).toThrow(
+      /SCHEMA_CACHE_TTL_MS must be a positive integer/,
+    );
   });
 
   it('leaves stepTimeoutMs undefined when STEP_TIMEOU_MS is unset (default applied downstream in build)', () => {
@@ -292,6 +307,7 @@ describe('printHelp / printVersion', () => {
     expect(output).toContain(`Default: ${DEFAULT_STOP_TIMEOUT_MS}`);
     expect(output).toContain(`default: ${DEFAULT_STEP_TIMEOUT_MS}`);
     expect(output).toContain(`default: ${DEFAULT_MAX_CHAIN_DEPTH}`);
+    expect(output).toContain(`default: ${DEFAULT_SCHEMA_CACHE_TTL_MS}`);
   });
 
   it('printVersion prints a version string', () => {