fix(omp): resume by mode, not silently as claude, and support --continue

resumeHistorySession() never sent mode when recreating a session from a
history/session-manager row, so the server default silently opened a
plain Claude session for every non-claude row -- reproduced live: OMP
rows spawned Claude sessions on click. Thread the row's mode through
every call site (welcome list, session manager, mobile overview) and
only send the Claude-specific resumeSessionId for claude rows.

Codeman has no live PTY-reattach outside server boot, and it's moot for
OMP anyway (exiting it kills the pane's only process), so route the
non-claude relaunch through each CLI's own continue-most-recent flag
instead of a context-free fresh start. OMP never got one: buildOmpCommand
only implemented --model/--resume despite omp --help documenting
-c/--continue. Added continueSession to OmpConfig end-to-end (type,
schema, builder) mirroring the existing opencode/pi/grok/deepseek
fields, and wired resumeHistorySession to use it.

Verified live: told a real omp session a secret, exited it, closed the
tab without killing tmux, relaunched with --continue in the same
directory, and had it recall the secret.

src/tmux-manager.ts

@@ -914,9 +914,14 @@ function buildOmpCommand(config?: OmpConfig): string {
     if (safeModel) parts.push('--model', safeModel);
   }
 
-  if (config?.resumeSessionId) {
-    const safeId = /^[a-zA-Z0-9._-]+$/.test(config.resumeSessionId) ? config.resumeSessionId : undefined;
-    if (safeId) parts.push('--resume', safeId);
+  // --resume and --continue conflict; a valid explicit session id wins,
+  // mirroring the sibling builders (grok/pi/opencode).
+  const safeId =
+    config?.resumeSessionId && /^[a-zA-Z0-9._-]+$/.test(config.resumeSessionId) ? config.resumeSessionId : undefined;
+  if (safeId) {
+    parts.push('--resume', safeId);
+  } else if (config?.continueSession) {
+    parts.push('--continue');
   }
 
   return parts.join(' ');

src/types/session.ts

@@ -350,6 +350,8 @@ export interface OmpConfig {
   model?: string;
   /** Resume a previous conversation (passed via --resume). */
   resumeSessionId?: string;
+  /** Continue the most recent session in this directory (passed via --continue). */
+  continueSession?: boolean;
 }
 
 /**

src/web/public/mobile-overview.js

@@ -389,7 +389,7 @@ Object.assign(CodemanApp.prototype, {
   async resumeMobileOverviewSession(sessionId) {
     const row = (this._mobileOverviewPastRows || []).find((r) => r.id === sessionId);
     if (!row || !row.workingDir) return;
-    await this.resumeHistorySession(row.claudeSessionId || row.id, row.workingDir, row.name || undefined);
+    await this.resumeHistorySession(row.claudeSessionId || row.id, row.workingDir, row.name || undefined, row.mode);
   },
 
   // ═══════════════════════════════════════════════════════════════

src/web/public/panels-ui.js

@@ -670,7 +670,7 @@ Object.assign(CodemanApp.prototype, {
             } else if (record.workingDir) {
               // History rows are keyed by the Claude conversation UUID; resumed
               // sessions carry theirs separately as claudeSessionId.
-              void this.resumeHistorySession(s.claudeSessionId || s.sessionId, record.workingDir);
+              void this.resumeHistorySession(s.claudeSessionId || s.sessionId, record.workingDir, undefined, s.mode);
             }
           },
         });

src/web/public/session-ui.js

@@ -692,7 +692,7 @@ Object.assign(CodemanApp.prototype, {
         btn.append(...parts);
         btn.addEventListener('click', (e) => {
           e.stopPropagation();
-          this.resumeHistorySession(s.sessionId, s.workingDir, s.name);
+          this.resumeHistorySession(s.sessionId, s.workingDir, s.name, s.mode);
         });
         container.appendChild(btn);
       }

src/web/public/terminal-ui.js

@@ -2193,7 +2193,7 @@ Object.assign(CodemanApp.prototype, {
           if (isLive && this.sessions.has(s.sessionId)) {
             this.selectSession(s.sessionId);
           } else {
-            this.resumeHistorySession(s.claudeSessionId || s.sessionId, s.workingDir || '', s.name);
+            this.resumeHistorySession(s.claudeSessionId || s.sessionId, s.workingDir || '', s.name, s.mode);
           }
         })
     );
@@ -2436,7 +2436,7 @@ Object.assign(CodemanApp.prototype, {
         } else {
           // Resume by the Claude conversation UUID when present (resumed sessions
           // carry theirs separately from their Codeman id).
-          this.resumeHistorySession(s.claudeSessionId || s.sessionId, s.workingDir || '', s.name);
+          this.resumeHistorySession(s.claudeSessionId || s.sessionId, s.workingDir || '', s.name, s.mode);
         }
         this.closeSessionManager?.();
         closeMenu();
@@ -2904,7 +2904,7 @@ Object.assign(CodemanApp.prototype, {
     return `w${startNumber}-${dirName}`;
   },
 
-  async resumeHistorySession(sessionId, workingDir, existingName) {
+  async resumeHistorySession(sessionId, workingDir, existingName, mode) {
     // Close the run mode menu if open
     document.getElementById('runModeMenu')?.classList.remove('active');
     // Close folder history modal if open
@@ -2925,13 +2925,38 @@ Object.assign(CodemanApp.prototype, {
       const globalSettings = this.loadAppSettingsFromStorage();
       const envOverrides = this.buildEnvOverrides(this.getCaseSettings(caseName), globalSettings);
       const effort = this.getEffortSetting(globalSettings);
+      // `resumeSessionId` is a Claude conversation UUID (server reads it from
+      // ~/.claude/projects); an external-CLI row has no such thing, so sending
+      // it there gets silently ignored while the OMITTED `mode` field defaults
+      // the create to plain claude — reproducing whatever conversation THAT
+      // uuid happens to collide with instead of the row's own backend. Row mode
+      // wins here. Codeman has no cross-restart PTY-reattach outside server
+      // boot, so "resume" for a non-claude row means relaunching the CLI's own
+      // continue-most-recent flag (opencode/pi/grok/omp --continue, deepseek
+      // resumeSession) in the same directory — real conversation continuity,
+      // just not the literal old process.
+      const effectiveMode = mode || 'claude';
+      const modeConfigKey = {
+        opencode: 'openCodeConfig',
+        pi: 'piConfig',
+        grok: 'grokConfig',
+        omp: 'ompConfig',
+      }[effectiveMode];
+      const modeConfig =
+        modeConfigKey
+          ? { [modeConfigKey]: { continueSession: true } }
+          : effectiveMode === 'deepseek'
+            ? { deepSeekConfig: { resumeSession: true } }
+            : {};
       const createRes = await fetch('/api/sessions', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({
           workingDir,
           name,
-          resumeSessionId: sessionId,
+          mode: effectiveMode,
+          ...(effectiveMode === 'claude' ? { resumeSessionId: sessionId } : {}),
+          ...modeConfig,
           ...(Object.keys(envOverrides).length > 0 ? { envOverrides } : {}),
           ...(effort ? { effort } : {}),
         }),

src/web/schemas.ts

@@ -361,6 +361,7 @@ const OmpConfigSchema = z
       .max(100)
       .regex(/^[a-zA-Z0-9._-]+$/)
       .optional(),
+    continueSession: z.boolean().optional(),
   })
   .optional();
 

test/command-palette-ui.test.ts

@@ -401,7 +401,7 @@ describe('Session Manager unified list', () => {
     const [historyRecord, , historyOptions] = app._buildHistoryItem.mock.calls[1];
     expect(historyRecord).toMatchObject({ sessionId: 'conv-uuid-1', sizeBytes: 2048, firstPrompt: 'old prompt' });
     historyOptions.onActivate();
-    expect(app.resumeHistorySession).toHaveBeenCalledWith('conv-uuid-1', '/repo/old');
+    expect(app.resumeHistorySession).toHaveBeenCalledWith('conv-uuid-1', '/repo/old', undefined, undefined);
   });
 
   it('surfaces an error message instead of an empty list when the endpoint fails', async () => {

test/omp-mode.test.ts

@@ -85,6 +85,26 @@ describe('OMP spawn command', () => {
     ).toBe('omp');
   });
 
+  it('continues the most recent session when no explicit resume id is given', () => {
+    expect(
+      buildSpawnCommand({
+        mode: 'omp',
+        sessionId: 'abc12345',
+        ompConfig: { continueSession: true },
+      })
+    ).toBe('omp --continue');
+  });
+
+  it('prefers an explicit --resume id over --continue', () => {
+    expect(
+      buildSpawnCommand({
+        mode: 'omp',
+        sessionId: 'abc12345',
+        ompConfig: { resumeSessionId: 'session-99', continueSession: true },
+      })
+    ).toBe('omp --resume session-99');
+  });
+
   it('drops unsafe model strings from the spawn command', () => {
     expect(
       buildSpawnCommand({