diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 3ee56b2..ebeeecc 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -106,7 +106,18 @@ export {
   type ReflexionKind,
   type ReflexionMetadata,
 } from './reflexion.js';
-export type { SearchResult, GetObservationsOptions, Observation, Session } from './types.js';
+export {
+  MAX_OPEN_PROPOSALS_PER_SCOUT,
+  SCOUT_PROPOSAL_ERROR_CODES,
+  type AgentRole,
+  type GetObservationsOptions,
+  type Observation,
+  type SearchResult,
+  type Session,
+  type ScoutProposalErrorCode,
+  type TaskProposalStatus,
+  type TaskThreadProposalFields,
+} from './types.js';
 export { createSessionId } from './ids.js';
 export { inferIdeFromSessionId } from './infer-ide.js';
 export {
diff --git a/packages/core/src/response-thresholds.ts b/packages/core/src/response-thresholds.ts
index ea9ddab..2b73aea 100644
--- a/packages/core/src/response-thresholds.ts
+++ b/packages/core/src/response-thresholds.ts
@@ -1,4 +1,5 @@
 import type { Storage } from '@colony/storage';
+import type { AgentRole } from './types.js';
 
 /**
  * Named capability dimensions. Intentionally small — five is the upper
@@ -17,10 +18,17 @@ export interface AgentCapabilities {
 
 export interface AgentProfile {
   agent: string;
+  role: AgentRole;
+  openProposalCount: number;
   capabilities: AgentCapabilities;
   updated_at: number;
 }
 
+interface AgentProfileStorageExtras {
+  role?: AgentRole | null;
+  open_proposal_count?: number | null;
+}
+
 /**
  * Default profile for agents that haven't registered capabilities yet.
  * All dimensions at 0.5 means "no preference either way" — the agent
@@ -121,6 +129,8 @@ export function loadProfile(storage: Storage, agent: string): AgentProfile {
   if (!row) {
     return {
       agent,
+      role: 'executor',
+      openProposalCount: 0,
       capabilities: { ...DEFAULT_CAPABILITIES },
       updated_at: 0,
     };
@@ -132,7 +142,14 @@ export function loadProfile(storage: Storage, agent: string): AgentProfile {
   } catch {
     caps = { ...DEFAULT_CAPABILITIES };
   }
-  return { agent, capabilities: caps, updated_at: row.updated_at };
+  const extras = row as typeof row & AgentProfileStorageExtras;
+  return {
+    agent,
+    role: extras.role ?? 'executor',
+    openProposalCount: extras.open_proposal_count ?? 0,
+    capabilities: caps,
+    updated_at: row.updated_at,
+  };
 }
 
 /** Write a full or partial capability profile for an agent. */
@@ -148,5 +165,11 @@ export function saveProfile(
     capabilities: JSON.stringify(merged),
     updated_at: Date.now(),
   });
-  return { agent, capabilities: merged, updated_at: Date.now() };
+  return {
+    agent,
+    role: current.role,
+    openProposalCount: current.openProposalCount,
+    capabilities: merged,
+    updated_at: Date.now(),
+  };
 }
diff --git a/packages/core/src/task-thread.ts b/packages/core/src/task-thread.ts
index e6d2978..0e87056 100644
--- a/packages/core/src/task-thread.ts
+++ b/packages/core/src/task-thread.ts
@@ -16,6 +16,7 @@ import {
   loadProfile,
   rankCandidates,
 } from './response-thresholds.js';
+import { SCOUT_PROPOSAL_ERROR_CODES } from './types.js';
 import {
   type WorkingHandoffNoteInput,
   type WorkingHandoffNoteResult,
@@ -101,6 +102,7 @@ export const TASK_THREAD_ERROR_CODES = {
   CLAIM_BATON_CONFLICT: 'CLAIM_BATON_CONFLICT',
   INVALID_CLAIM_PATH: 'INVALID_CLAIM_PATH',
   PROTECTED_BRANCH_CLAIM_REJECTED: 'PROTECTED_BRANCH_CLAIM_REJECTED',
+  ...SCOUT_PROPOSAL_ERROR_CODES,
   INTERNAL_ERROR: 'INTERNAL_ERROR',
 } as const;
 
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index fc084c4..5de55c7 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -1,3 +1,25 @@
+export type AgentRole = 'scout' | 'executor' | 'queen';
+
+export const MAX_OPEN_PROPOSALS_PER_SCOUT = 3;
+
+export type TaskProposalStatus = 'proposed' | 'approved' | 'archived';
+
+export interface TaskThreadProposalFields {
+  proposalStatus?: TaskProposalStatus | null;
+  approvedBy?: string | null;
+  observationEvidenceIds?: number[];
+}
+
+export const SCOUT_PROPOSAL_ERROR_CODES = {
+  PROPOSAL_MISSING_EVIDENCE: 'PROPOSAL_MISSING_EVIDENCE',
+  PROPOSAL_CAP_EXCEEDED: 'PROPOSAL_CAP_EXCEEDED',
+  EXECUTOR_CANNOT_PROPOSE: 'EXECUTOR_CANNOT_PROPOSE',
+  SCOUT_NO_CLAIM: 'SCOUT_NO_CLAIM',
+} as const;
+
+export type ScoutProposalErrorCode =
+  (typeof SCOUT_PROPOSAL_ERROR_CODES)[keyof typeof SCOUT_PROPOSAL_ERROR_CODES];
+
 export interface Observation {
   id: number;
   session_id: string;
diff --git a/packages/core/test/response-thresholds.test.ts b/packages/core/test/response-thresholds.test.ts
index 5d7e0a1..e239049 100644
--- a/packages/core/test/response-thresholds.test.ts
+++ b/packages/core/test/response-thresholds.test.ts
@@ -112,6 +112,8 @@ describe('rankCandidates', () => {
 describe('loadProfile / saveProfile', () => {
   it('loadProfile returns the default capabilities for unknown agents', () => {
     const profile = loadProfile(store.storage, 'unknown');
+    expect(profile.role).toBe('executor');
+    expect(profile.openProposalCount).toBe(0);
     expect(profile.capabilities).toEqual(DEFAULT_CAPABILITIES);
     expect(profile.updated_at).toBe(0);
   });
@@ -120,6 +122,8 @@ describe('loadProfile / saveProfile', () => {
     saveProfile(store.storage, 'claude', { ui_work: 0.9, api_work: 0.4 });
     saveProfile(store.storage, 'claude', { ui_work: 0.95 });
     const profile = loadProfile(store.storage, 'claude');
+    expect(profile.role).toBe('executor');
+    expect(profile.openProposalCount).toBe(0);
     expect(profile.capabilities.ui_work).toBe(0.95);
     // Other values preserved from previous save.
     expect(profile.capabilities.api_work).toBe(0.4);