diff --git a/packages/persona-kit/schemas/agent.schema.json b/packages/persona-kit/schemas/agent.schema.json
index eca01204..51bb0df6 100644
--- a/packages/persona-kit/schemas/agent.schema.json
+++ b/packages/persona-kit/schemas/agent.schema.json
@@ -48,12 +48,17 @@
         },
         "where": {
           "type": "string"
+        },
+        "maxConcurrency": {
+          "type": "integer",
+          "description": "Optional delivery backpressure hint for this trigger. Positive integers are preserved by the parser; invalid values are treated as unset so older or malformed specs do not block delivery.",
+          "minimum": 1
         }
       },
       "required": [
         "on"
       ],
-      "description": "A single event trigger declared by an **agent** (`agent.ts`). `on` is a Relayfile-adapter-normalized event name (e.g. `pull_request.opened`, `issue.create`, `message.created`). `match` and `where` are filter sugars the deploy CLI lints against a known registry; unknown values warn but do not fail parse, so the cloud runtime stays the source of truth.\n\nTriggers live on the agent ( {@link  AgentSpec.triggers } ), not the persona — the persona only declares which providers it connects to ( {@link  PersonaIntegrationConfig } ). The deploy CLI joins the two: events from `agent.triggers[provider]`, connection/scope from `persona.integrations[provider]`.\n\nExamples:   { on: \"pull_request.opened\" }   { on: \"pull_request_review_comment.created\", match: \"@mention\" }   { on: \"check_run.completed\", where: \"conclusion=failure\" }"
+      "description": "A single event trigger declared by an **agent** (`agent.ts`). `on` is a Relayfile-adapter-normalized event name (e.g. `pull_request.opened`, `issue.create`, `message.created`). `match` and `where` are filter sugars the deploy CLI lints against a known registry; unknown values warn but do not fail parse, so the cloud runtime stays the source of truth.\n\nTriggers live on the agent ( {@link  AgentSpec.triggers } ), not the persona — the persona only declares which providers it connects to ( {@link  PersonaIntegrationConfig } ). The deploy CLI joins the two: events from `agent.triggers[provider]`, connection/scope from `persona.integrations[provider]`.\n\nExamples:   { on: \"pull_request.opened\" }   { on: \"pull_request_review_comment.created\", match: \"@mention\" }   { on: \"check_run.completed\", where: \"conclusion=failure\" }   { on: \"message.created\", maxConcurrency: 1 }"
     },
     "PersonaSchedule": {
       "type": "object",
diff --git a/packages/persona-kit/scripts/emit-schema.mjs b/packages/persona-kit/scripts/emit-schema.mjs
index 87856146..a046f28e 100644
--- a/packages/persona-kit/scripts/emit-schema.mjs
+++ b/packages/persona-kit/scripts/emit-schema.mjs
@@ -134,6 +134,18 @@ const agentSchema = agentGenerator.createSchema('AgentSpec');
 agentSchema.$schema = 'https://json-schema.org/draft/2020-12/schema';
 agentSchema.$id = 'https://agentworkforce.dev/schemas/agent.schema.json';
 
+const agentTrigger = agentSchema.definitions?.PersonaIntegrationTrigger;
+if (
+  agentTrigger &&
+  agentTrigger.properties?.maxConcurrency?.type === 'number'
+) {
+  agentTrigger.properties.maxConcurrency = {
+    ...agentTrigger.properties.maxConcurrency,
+    type: 'integer',
+    minimum: 1
+  };
+}
+
 const agentSerialized = `${JSON.stringify(agentSchema, null, 2)}\n`;
 let existingAgent = '';
 try {
diff --git a/packages/persona-kit/src/define.test.ts b/packages/persona-kit/src/define.test.ts
index 4addb54f..f883471a 100644
--- a/packages/persona-kit/src/define.test.ts
+++ b/packages/persona-kit/src/define.test.ts
@@ -67,10 +67,11 @@ test('TypedTriggerMap gives per-provider event autocomplete; arbitrary providers
       { on: 'AgentSessionEvent.prompted' },
       { on: 'AppUserNotification.issueCommentMention' }
     ],
-    slack: [{ on: 'message.created' }],
+    slack: [{ on: 'message.created', maxConcurrency: 1 }],
     customProvider: [{ on: 'custom.event' }]
   };
   assert.equal(triggers.github?.[1]?.on, 'off_registry.github_event');
+  assert.equal(triggers.slack?.[0]?.maxConcurrency, 1);
   assert.equal(triggers.customProvider?.[0]?.on, 'custom.event');
 });
 
diff --git a/packages/persona-kit/src/define.ts b/packages/persona-kit/src/define.ts
index 038c276d..76eb2adb 100644
--- a/packages/persona-kit/src/define.ts
+++ b/packages/persona-kit/src/define.ts
@@ -23,6 +23,7 @@ export interface TypedTrigger<P extends string> {
   on: TriggerNameFor<P>;
   match?: string;
   where?: string;
+  maxConcurrency?: number;
 }
 
 /**
diff --git a/packages/persona-kit/src/emit-schema.test.ts b/packages/persona-kit/src/emit-schema.test.ts
index ff39004f..4c419ef3 100644
--- a/packages/persona-kit/src/emit-schema.test.ts
+++ b/packages/persona-kit/src/emit-schema.test.ts
@@ -138,6 +138,24 @@ test('agent schema exposes launchedBy/triggers/schedules/watch', async () => {
   assert.equal(watchRule.properties?.paths && watchRule.properties.paths !== true
     ? watchRule.properties.paths.type
     : undefined, 'array');
+  const trigger = definitions.PersonaIntegrationTrigger;
+  const maxConcurrency = trigger.properties?.maxConcurrency;
+  assert.equal(maxConcurrency && maxConcurrency !== true
+    ? maxConcurrency.type
+    : undefined, 'integer');
+  assert.equal(maxConcurrency && maxConcurrency !== true
+    ? maxConcurrency.minimum
+    : undefined, 1);
+
+  assertSchema({ triggers: { slack: [{ on: 'message.created', maxConcurrency: 1 }] } }, schema, schema, 'agent');
+  assert.throws(
+    () => assertSchema({ triggers: { slack: [{ on: 'message.created', maxConcurrency: 0 }] } }, schema, schema, 'agent'),
+    /agent\.triggers\.slack\[0\]\.maxConcurrency must be >= 1/
+  );
+  assert.throws(
+    () => assertSchema({ triggers: { slack: [{ on: 'message.created', maxConcurrency: 1.5 }] } }, schema, schema, 'agent'),
+    /agent\.triggers\.slack\[0\]\.maxConcurrency must be integer/
+  );
 });
 
 type SchemaNode = Record<string, unknown> & {
@@ -150,6 +168,7 @@ type SchemaNode = Record<string, unknown> & {
   enum?: unknown[];
   const?: unknown;
   type?: string | string[];
+  minimum?: number;
   properties?: Record<string, SchemaNode | boolean>;
   additionalProperties?: SchemaNode | boolean;
   required?: string[];
@@ -189,6 +208,9 @@ function assertSchema(value: unknown, schema: SchemaNode, root: SchemaNode, path
   if (schema.type) {
     assertType(value, schema.type, path);
   }
+  if (typeof schema.minimum === 'number' && typeof value === 'number' && value < schema.minimum) {
+    throw new Error(`${path} must be >= ${schema.minimum}`);
+  }
   if (schema.type === 'object' || schema.properties || schema.additionalProperties || schema.required) {
     if (!isObject(value)) {
       throw new Error(`${path} must be an object`);
diff --git a/packages/persona-kit/src/parse.test.ts b/packages/persona-kit/src/parse.test.ts
index e482efd6..2c618bb5 100644
--- a/packages/persona-kit/src/parse.test.ts
+++ b/packages/persona-kit/src/parse.test.ts
@@ -675,7 +675,7 @@ test('parseAgentSpec validates launchedBy plus provider-keyed triggers, schedule
     triggers: {
       github: [
         { on: 'pull_request.opened' },
-        { on: 'issue_comment.created', match: '@mention' }
+        { on: 'issue_comment.created', match: '@mention', maxConcurrency: 1 }
       ],
       slack: [{ on: 'app_mention' }]
     },
@@ -684,12 +684,41 @@ test('parseAgentSpec validates launchedBy plus provider-keyed triggers, schedule
   });
   assert.equal(agent.triggers?.github.length, 2);
   assert.equal(agent.triggers?.github[1].match, '@mention');
+  assert.equal(agent.triggers?.github[1].maxConcurrency, 1);
   assert.equal(agent.triggers?.slack[0].on, 'app_mention');
   assert.equal(agent.schedules?.[0].name, 'nightly');
   assert.equal(agent.watch?.[0].paths[0], '/github/x.json');
   assert.equal(agent.launchedBy, 'team-dispatcher');
 });
 
+test('parseAgentSpec omits invalid trigger maxConcurrency values', () => {
+  const agent = parseAgentSpec({
+    triggers: {
+      github: [
+        { on: 'absent' },
+        { on: 'valid', maxConcurrency: 2 },
+        { on: 'zero', maxConcurrency: 0 },
+        { on: 'negative', maxConcurrency: -1 },
+        { on: 'fractional', maxConcurrency: 1.5 },
+        { on: 'nan', maxConcurrency: NaN },
+        { on: 'infinity', maxConcurrency: Infinity },
+        { on: 'string', maxConcurrency: '1' }
+      ]
+    }
+  });
+
+  assert.deepEqual(agent.triggers?.github, [
+    { on: 'absent' },
+    { on: 'valid', maxConcurrency: 2 },
+    { on: 'zero' },
+    { on: 'negative' },
+    { on: 'fractional' },
+    { on: 'nan' },
+    { on: 'infinity' },
+    { on: 'string' }
+  ]);
+});
+
 test('parseAgentSpec rejects malformed triggers maps with precise field paths', () => {
   assert.throws(
     () => parseAgentSpec({ launchedBy: 'cron' }),
@@ -701,6 +730,14 @@ test('parseAgentSpec rejects malformed triggers maps with precise field paths',
     () => parseAgentSpec({ triggers: { github: [{ on: '' }] } }),
     /triggers\.github\[0\]\.on must be a non-empty string/
   );
+  assert.throws(
+    () => parseAgentSpec({ triggers: { github: [{ on: 'issue.opened', match: '' }] } }),
+    /triggers\.github\[0\]\.match must be a non-empty string if provided/
+  );
+  assert.throws(
+    () => parseAgentSpec({ triggers: { github: [{ on: 'issue.opened', where: 1 }] } }),
+    /triggers\.github\[0\]\.where must be a non-empty string if provided/
+  );
   // An empty agent (no listeners) parses to {}; the deploy CLI enforces "at least one".
   assert.deepEqual(parseAgentSpec({}), {});
 });
diff --git a/packages/persona-kit/src/parse.ts b/packages/persona-kit/src/parse.ts
index 3fbb30df..37b08183 100644
--- a/packages/persona-kit/src/parse.ts
+++ b/packages/persona-kit/src/parse.ts
@@ -543,7 +543,7 @@ export function parseIntegrationTrigger(
   if (!isObject(value)) {
     throw new Error(`${context} must be an object`);
   }
-  const { on, match, where } = value;
+  const { on, match, where, maxConcurrency } = value;
   if (typeof on !== 'string' || !on.trim()) {
     throw new Error(`${context}.on must be a non-empty string`);
   }
@@ -553,10 +553,21 @@ export function parseIntegrationTrigger(
   if (where !== undefined && (typeof where !== 'string' || !where.trim())) {
     throw new Error(`${context}.where must be a non-empty string if provided`);
   }
+  // Intentionally lenient: Cloud derives this as an optional backpressure hint,
+  // so invalid values mean "unset" rather than a parse failure.
+  const parsedMaxConcurrency =
+    typeof maxConcurrency === 'number' &&
+    Number.isInteger(maxConcurrency) &&
+    maxConcurrency >= 1
+      ? maxConcurrency
+      : undefined;
   return {
     on,
     ...(typeof match === 'string' ? { match } : {}),
-    ...(typeof where === 'string' ? { where } : {})
+    ...(typeof where === 'string' ? { where } : {}),
+    ...(parsedMaxConcurrency !== undefined
+      ? { maxConcurrency: parsedMaxConcurrency }
+      : {})
   };
 }
 
diff --git a/packages/persona-kit/src/types.ts b/packages/persona-kit/src/types.ts
index 97803762..0c002daa 100644
--- a/packages/persona-kit/src/types.ts
+++ b/packages/persona-kit/src/types.ts
@@ -194,11 +194,18 @@ export type McpServerSpec =
  *   { on: "pull_request.opened" }
  *   { on: "pull_request_review_comment.created", match: "@mention" }
  *   { on: "check_run.completed", where: "conclusion=failure" }
+ *   { on: "message.created", maxConcurrency: 1 }
  */
 export interface PersonaIntegrationTrigger {
   on: string;
   match?: string;
   where?: string;
+  /**
+   * Optional delivery backpressure hint for this trigger. Positive integers are
+   * preserved by the parser; invalid values are treated as unset so older or
+   * malformed specs do not block delivery.
+   */
+  maxConcurrency?: number;
 }
 
 /**