feat(cli): add --resume and --continue flags to launch

claudemesh launch now supports:
  --resume <id> / -r  — resume a previous Claude Code session
  --continue / -c     — continue the most recent conversation

When resuming, skips generating a new session ID so the mesh peer
identity persists. The detectClaudeSessionId() fallback in ws/client.ts
picks up the existing session UUID from the .jsonl file.

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

apps/cli/src/commands/launch.ts

@@ -32,6 +32,8 @@ export interface LaunchFlags {
   mesh?: string;
   "message-mode"?: string;
   "system-prompt"?: string;
+  resume?: string;
+  continue?: boolean;
   yes?: boolean;
   quiet?: boolean;
 }
@@ -171,6 +173,8 @@ export async function runLaunch(flags: LaunchFlags, rawArgs: string[]): Promise<
       ? flags["message-mode"] as "push" | "inbox" | "off"
       : null),
     systemPrompt: flags["system-prompt"] ?? null,
+    resume: flags.resume ?? null,
+    continueSession: flags.continue ?? false,
     quiet: flags.quiet ?? false,
     skipPermConfirm: flags.yes ?? false,
     claudeArgs: claudePassthrough,
@@ -422,16 +426,17 @@ export async function runLaunch(flags: LaunchFlags, rawArgs: string[]): Promise<
   // passes -y / --yes. Without it, claudemesh tools still work because
   // `claudemesh install` pre-approves them via allowedTools in settings.json.
   // This keeps permissions tight for multi-person meshes.
-  // Generate a stable session ID for this launch. Used by the broker to:
-  // - detect reconnections (same session ID = restore state)
-  // - disambiguate multiple peers in the same project
-  // - persist identity across --resume (Claude reuses the session ID)
-  const claudeSessionId = randomUUID();
+  // Session identity: --resume reuses existing session, otherwise generate new.
+  // When resuming, Claude Code reuses the session ID so the mesh peer identity persists.
+  const isResume = args.resume !== null || args.continueSession;
+  const claudeSessionId = isResume ? undefined : randomUUID();
 
   const claudeArgs = [
     "--dangerously-load-development-channels",
     "server:claudemesh",
-    "--session-id", claudeSessionId,
+    ...(claudeSessionId ? ["--session-id", claudeSessionId] : []),
+    ...(args.resume ? ["--resume", args.resume] : []),
+    ...(args.continueSession ? ["--continue"] : []),
     ...(args.skipPermConfirm ? ["--dangerously-skip-permissions"] : []),
     ...(args.systemPrompt ? ["--system-prompt", args.systemPrompt] : []),
     ...filtered,
@@ -445,7 +450,7 @@ export async function runLaunch(flags: LaunchFlags, rawArgs: string[]): Promise<
       ...process.env,
       CLAUDEMESH_CONFIG_DIR: tmpDir,
       CLAUDEMESH_DISPLAY_NAME: displayName,
-      CLAUDEMESH_SESSION_ID: claudeSessionId,
+      ...(claudeSessionId ? { CLAUDEMESH_SESSION_ID: claudeSessionId } : {}),
       MCP_TIMEOUT: process.env.MCP_TIMEOUT ?? "30000",
       MAX_MCP_OUTPUT_TOKENS: process.env.MAX_MCP_OUTPUT_TOKENS ?? "50000",
       ...(role ? { CLAUDEMESH_ROLE: role } : {}),

apps/cli/src/index.ts

@@ -71,6 +71,17 @@ const launch = defineCommand({
       description: "Skip the --dangerously-skip-permissions confirmation",
       default: false,
     },
+    resume: {
+      type: "string",
+      alias: "r",
+      description: "Resume a previous Claude Code session by ID, or pass `true` for interactive picker",
+    },
+    continue: {
+      type: "boolean",
+      alias: "c",
+      description: "Continue the most recent conversation in this directory",
+      default: false,
+    },
     quiet: {
       type: "boolean",
       description: "Suppress banner and interactive prompts",