feat: v0.4.0 — File sharing + multi-target messages

Files: MinIO-backed file sharing built into the broker.
share_file for persistent mesh files, send_message(file:) for
ephemeral attachments. Presigned URLs for download, access
tracking per peer.

Broker infra: MinIO in docker-compose, internal network.
HTTP POST /upload endpoint. WS handlers for get_file,
list_files, file_status, delete_file.

Multi-target: send_message(to:) accepts string or array.
Targets deduplicated before delivery.

Targeted views: MCP instructions teach Claude to send
tailored messages per audience instead of generic broadcasts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/db/migrations/0009_add-file-tables.sql

@@ -0,0 +1,28 @@
+CREATE TABLE "mesh"."file" (
+	"id" text PRIMARY KEY NOT NULL,
+	"mesh_id" text NOT NULL,
+	"name" text NOT NULL,
+	"size_bytes" integer NOT NULL,
+	"mime_type" text,
+	"minio_key" text NOT NULL,
+	"tags" text[] DEFAULT '{}',
+	"persistent" boolean DEFAULT true NOT NULL,
+	"uploaded_by_name" text,
+	"uploaded_by_member" text,
+	"target_spec" text,
+	"uploaded_at" timestamp DEFAULT now() NOT NULL,
+	"expires_at" timestamp,
+	"deleted_at" timestamp
+);
+--> statement-breakpoint
+CREATE TABLE "mesh"."file_access" (
+	"id" text PRIMARY KEY NOT NULL,
+	"file_id" text NOT NULL,
+	"peer_session_pubkey" text,
+	"peer_name" text,
+	"accessed_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "mesh"."file" ADD CONSTRAINT "file_mesh_id_mesh_id_fk" FOREIGN KEY ("mesh_id") REFERENCES "mesh"."mesh"("id") ON DELETE cascade ON UPDATE cascade;--> statement-breakpoint
+ALTER TABLE "mesh"."file" ADD CONSTRAINT "file_uploaded_by_member_member_id_fk" FOREIGN KEY ("uploaded_by_member") REFERENCES "mesh"."member"("id") ON DELETE no action ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "mesh"."file_access" ADD CONSTRAINT "file_access_file_id_file_id_fk" FOREIGN KEY ("file_id") REFERENCES "mesh"."file"("id") ON DELETE cascade ON UPDATE no action;

packages/db/migrations/meta/_journal.json

@@ -64,6 +64,13 @@
       "when": 1775477883426,
       "tag": "0008_add-state-and-memory",
       "breakpoints": true
+    },
+    {
+      "idx": 9,
+      "version": "7",
+      "when": 1775480008546,
+      "tag": "0009_add-file-tables",
+      "breakpoints": true
     }
   ]
 }

packages/db/src/schema/mesh.ts

@@ -1,5 +1,6 @@
 import { relations } from "drizzle-orm";
 import {
+  boolean,
   integer,
   jsonb,
   pgSchema,
@@ -289,6 +290,43 @@ export const meshMemory = meshSchema.table("memory", {
   forgottenAt: timestamp(),
 });
 
+/**
+ * File metadata for shared files in a mesh. Actual bytes live in MinIO;
+ * this table tracks ownership, access control, and soft-deletion.
+ */
+export const meshFile = meshSchema.table("file", {
+  id: text().primaryKey().notNull().$defaultFn(generateId),
+  meshId: text()
+    .references(() => mesh.id, { onDelete: "cascade", onUpdate: "cascade" })
+    .notNull(),
+  name: text().notNull(),
+  sizeBytes: integer().notNull(),
+  mimeType: text(),
+  minioKey: text().notNull(),
+  tags: text().array().default([]),
+  persistent: boolean().notNull().default(true),
+  uploadedByName: text(),
+  uploadedByMember: text().references(() => meshMember.id),
+  targetSpec: text(), // null = entire mesh
+  uploadedAt: timestamp().defaultNow().notNull(),
+  expiresAt: timestamp(),
+  deletedAt: timestamp(),
+});
+
+/**
+ * Access log for file downloads. Tracks which peer accessed which file
+ * and when, for auditability and read-receipt semantics.
+ */
+export const meshFileAccess = meshSchema.table("file_access", {
+  id: text().primaryKey().notNull().$defaultFn(generateId),
+  fileId: text()
+    .references(() => meshFile.id, { onDelete: "cascade" })
+    .notNull(),
+  peerSessionPubkey: text(),
+  peerName: text(),
+  accessedAt: timestamp().defaultNow().notNull(),
+});
+
 export const meshRelations = relations(mesh, ({ one, many }) => ({
   owner: one(user, {
     fields: [mesh.ownerUserId],
@@ -367,6 +405,25 @@ export const meshMemoryRelations = relations(meshMemory, ({ one }) => ({
   }),
 }));
 
+export const meshFileRelations = relations(meshFile, ({ one, many }) => ({
+  mesh: one(mesh, {
+    fields: [meshFile.meshId],
+    references: [mesh.id],
+  }),
+  uploader: one(meshMember, {
+    fields: [meshFile.uploadedByMember],
+    references: [meshMember.id],
+  }),
+  accesses: many(meshFileAccess),
+}));
+
+export const meshFileAccessRelations = relations(meshFileAccess, ({ one }) => ({
+  file: one(meshFile, {
+    fields: [meshFileAccess.fileId],
+    references: [meshFile.id],
+  }),
+}));
+
 export const selectMeshSchema = createSelectSchema(mesh);
 export const insertMeshSchema = createInsertSchema(mesh);
 export const selectMemberSchema = createSelectSchema(meshMember);
@@ -404,3 +461,11 @@ export type SelectMeshState = typeof meshState.$inferSelect;
 export type InsertMeshState = typeof meshState.$inferInsert;
 export type SelectMeshMemory = typeof meshMemory.$inferSelect;
 export type InsertMeshMemory = typeof meshMemory.$inferInsert;
+export const selectMeshFileSchema = createSelectSchema(meshFile);
+export const insertMeshFileSchema = createInsertSchema(meshFile);
+export const selectMeshFileAccessSchema = createSelectSchema(meshFileAccess);
+export const insertMeshFileAccessSchema = createInsertSchema(meshFileAccess);
+export type SelectMeshFile = typeof meshFile.$inferSelect;
+export type InsertMeshFile = typeof meshFile.$inferInsert;
+export type SelectMeshFileAccess = typeof meshFileAccess.$inferSelect;
+export type InsertMeshFileAccess = typeof meshFileAccess.$inferInsert;