refactor(j5): rename A2A epics to squadrons

FORK.md

@@ -39,7 +39,7 @@ Treat these upstream areas as off-limits except for those explicit appended case
 
 Against upstream pin `993407dd9e57f1edf2f5681d70140bfefeca93cc`, the complete A2A exception inventory is exactly these four cases. Line numbers identify this revision; the named symbol or test is the durable anchor after nearby upstream movement.
 
-1. A1's independent migration lane: `apps/server/src/persistence/Layers/Sqlite.ts:10` imports `runJ5A2AMigrations`, and `:42` runs it after upstream migrations. Introduced by `a064a87ac40ea2d2d936ba72008c95edeb8bbc2b` and merged in `521c50aa9bb6b4c7f55bc10a772822ec31129f2d`.
+1. A1's independent Squadron communication-ledger migration lane: `apps/server/src/persistence/Layers/Sqlite.ts:10` imports `runJ5A2AMigrations`, and `:42` runs it after upstream migrations. Introduced by `a064a87ac40ea2d2d936ba72008c95edeb8bbc2b` and merged in `521c50aa9bb6b4c7f55bc10a772822ec31129f2d`.
 2. The one shared authenticated J5 MCP/runtime seam: `apps/server/src/mcp/McpHttpServer.ts:31` imports `J5McpIntegrationLive`, and `:247-248` append its sole entry to `layer`. Registration and runtime composition stay in `apps/server/src/j5/a2a/mcp/registration.ts`; A6 extends the J5-owned toolkit without another protected-file registration.
 3. The internal delivery-dedup contract proof: `apps/server/src/orchestration-v2/runtimeLayer.test.ts:188-234`, test `replays an internal thread send without injecting a second message`.
 4. The authenticated shared-toolkit integration proof: `apps/server/src/mcp/toolkits/worktree/registration.test.ts:15,70,83-90,128-131`, within test `production mcp layer lists worktree tools over http`.

apps/server/src/j5/a2a/DeliveryTransport.integration.test.ts

@@ -58,7 +58,7 @@ import { formatHumanEnvelope, formatPeerEnvelope } from "./EnvelopeFormatter.ts"
 import { A2ALedger, layer as ledgerLayer } from "./LedgerService.ts";
 import {
   CommCommandId,
-  EpicId,
+  SquadronId,
   ExchangeId,
   GLOBAL_HUMAN_PARTICIPANT_ID,
   LedgerMessageId,
@@ -259,7 +259,7 @@ const seedTarget = (suffix: string) =>
     const ledger = yield* A2ALedger;
     const threadId = ThreadId.make(`thread:j5-a2a-delivery-${suffix}`);
     const projectId = ProjectId.make(`project:j5-a2a-delivery-${suffix}`);
-    const epicId = EpicId.make(`epic:j5-a2a-delivery-${suffix}`);
+    const squadronId = SquadronId.make(`squadron:j5-a2a-delivery-${suffix}`);
     const senderId = ParticipantId.make(`agent:j5-a2a-delivery-${suffix}-sender`);
     const receiverId = ParticipantId.make(`agent:j5-a2a-delivery-${suffix}-receiver`);
     const exchangeId = ExchangeId.make(`exchange:j5-a2a-delivery-${suffix}`);
@@ -281,12 +281,12 @@ const seedTarget = (suffix: string) =>
       branch: null,
       worktreePath: `/tmp/j5-a2a-delivery-${suffix}`,
     });
-    yield* ledger.createEpic({
-      epic: { id: epicId, name: `J5 A2A ${suffix} delivery`, createdAt },
+    yield* ledger.createSquadron({
+      squadron: { id: squadronId, name: `J5 A2A ${suffix} delivery`, createdAt },
     });
     yield* ledger.appendEvents({
       commandId: CommCommandId.make(`command:j5-a2a-delivery-${suffix}-join-target`),
-      epicId,
+      squadronId,
       acceptedAt: createdAt,
       events: [
         {
@@ -306,15 +306,15 @@ const seedTarget = (suffix: string) =>
     return {
       threadId,
       projectId,
-      epicId,
+      squadronId,
       senderId,
       receiverId,
       exchangeId,
       messageId,
       message,
       delivery: {
-        originEpicId: epicId,
-        receiverEpicId: epicId,
+        originSquadronId: squadronId,
+        receiverSquadronId: squadronId,
         messageId,
         senderId,
         receiverId,
@@ -345,7 +345,7 @@ it.effect("starts an idle recipient immediately without the implicit auto mode",
         deliveredMessages[0]?.text,
         formatPeerEnvelope({
           senderId: target.senderId,
-          originEpicId: target.epicId,
+          originSquadronId: target.squadronId,
           exchangeId: target.exchangeId,
           message: target.message,
         }),
@@ -421,7 +421,7 @@ it.effect("steers a busy recipient inside its active turn without queueing a lat
         deliveredMessages[0]?.text,
         formatPeerEnvelope({
           senderId: target.senderId,
-          originEpicId: target.epicId,
+          originSquadronId: target.squadronId,
           exchangeId: target.exchangeId,
           message: target.message,
         }),

apps/server/src/j5/a2a/DeliveryTransport.ts

@@ -8,7 +8,7 @@ import * as SqlClient from "effect/unstable/sql/SqlClient";
 import * as ThreadManagement from "../../orchestration-v2/ThreadManagementService.ts";
 import { formatHumanEnvelope, formatPeerEnvelope } from "./EnvelopeFormatter.ts";
 import {
-  EpicId,
+  SquadronId,
   ExchangeId,
   GLOBAL_HUMAN_PARTICIPANT_ID,
   Participant,
@@ -37,8 +37,8 @@ export class A2ADeliveryTransportError extends Schema.TaggedErrorClass<A2ADelive
 ) {}
 
 export interface AgentDeliveryInput {
-  readonly originEpicId: EpicId;
-  readonly receiverEpicId: EpicId;
+  readonly originSquadronId: SquadronId;
+  readonly receiverSquadronId: SquadronId;
   readonly messageId: LedgerMessageId;
   readonly senderId: ParticipantId;
   readonly receiverId: ParticipantId;
@@ -98,8 +98,8 @@ export const live: Layer.Layer<
         Effect.gen(function* () {
           const rows = yield* sql<MembershipRow>`
             SELECT payload
-            FROM j5_a2a_epic_membership
-            WHERE epic_id = ${input.receiverEpicId}
+            FROM j5_a2a_squadron_membership
+            WHERE squadron_id = ${input.receiverSquadronId}
               AND participant_id = ${input.receiverId}
             LIMIT 1
           `;
@@ -132,7 +132,7 @@ export const live: Layer.Layer<
                 })
               : formatPeerEnvelope({
                   senderId: input.senderId,
-                  originEpicId: input.originEpicId,
+                  originSquadronId: input.originSquadronId,
                   exchangeId: input.exchangeId,
                   message: input.message,
                 });
@@ -155,21 +155,21 @@ export const live: Layer.Layer<
       deliverHuman: (input) =>
         sql`
             INSERT INTO j5_a2a_human_inbox_data (
-              origin_epic_id,
+              origin_squadron_id,
               message_id,
               exchange_id,
               sender_id,
               payload,
               created_at
             ) VALUES (
-              ${input.originEpicId},
+              ${input.originSquadronId},
               ${input.messageId},
               ${input.exchangeId},
               ${input.senderId},
               ${input.message},
               ${input.createdAt}
             )
-            ON CONFLICT(origin_epic_id, message_id) DO NOTHING
+            ON CONFLICT(origin_squadron_id, message_id) DO NOTHING
           `.pipe(
           Effect.asVoid,
           Effect.mapError(