diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8622a7..e10dc80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to OpenOrbit are documented in this file.
 The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 and this project uses [Semantic Versioning](https://semver.org/).
 
+## [0.12.3] - 2026-09-25
+
+### Fixed
+
+- Builds can now select and retain multiple personas in the create and edit workflow.
+
 ## [0.12.2] - 2026-09-25
 
 ### Fixed
diff --git a/frontend/package.json b/frontend/package.json
index 61e1a8e..904113f 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,7 +1,7 @@
 {
   "name": "agent-improvement-console-ui",
   "private": true,
-  "version": "0.12.2",
+  "version": "0.12.3",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/frontend/src/features/builds/page.tsx b/frontend/src/features/builds/page.tsx
index 961b60d..3123134 100644
--- a/frontend/src/features/builds/page.tsx
+++ b/frontend/src/features/builds/page.tsx
@@ -467,24 +467,38 @@ function Direct({
             label={copy.persona.label}
             description={copy.persona.hint}
           >
-            <select
-              value={d.persona_ids[0] ?? ""}
-              onChange={(event) =>
-                setD({
-                  ...d,
-                  persona_ids: event.currentTarget.value
-                    ? [event.currentTarget.value]
-                    : [],
+            <div className="build-persona-selector">
+              {personas.length === 0 ? (
+                <span className="hint">{copy.persona.none}</span>
+              ) : (
+                personas.map((persona) => {
+                  const selected = d.persona_ids.includes(persona.id);
+                  return (
+                    <label
+                      className="build-persona-selector__option"
+                      key={persona.id}
+                    >
+                      <input
+                        type="checkbox"
+                        checked={selected}
+                        onChange={() =>
+                          setD({
+                            ...d,
+                            persona_ids: selected
+                              ? d.persona_ids.filter((id) => id !== persona.id)
+                              : [...d.persona_ids, persona.id],
+                          })
+                        }
+                      />
+                      <span>
+                        <strong>{persona.name}</strong>
+                        <small>{persona.locale}</small>
+                      </span>
+                    </label>
+                  );
                 })
-              }
-            >
-              <option value="">{copy.persona.none}</option>
-              {personas.map((persona) => (
-                <option key={persona.id} value={persona.id}>
-                  {persona.name} · {persona.locale}
-                </option>
-              ))}
-            </select>
+              )}
+            </div>
           </Field>
           <Field label={copy.aiProfile.label} description={copy.aiProfile.hint}>
             <select
diff --git a/frontend/src/theme-overrides.css b/frontend/src/theme-overrides.css
index a14036f..dd14be5 100644
--- a/frontend/src/theme-overrides.css
+++ b/frontend/src/theme-overrides.css
@@ -175,6 +175,7 @@ select option[value="docker"] { display:none; }
 .app-data-settings .setting-row { align-items:stretch; flex-direction:column; gap:12px; }.app-data-path-actions { width:100%; }
 .retry-confirmation .modal-actions { flex-wrap:wrap; }.retry-confirmation .approve { background:var(--accent); color:#182318; }
 .build-schedule-toggle,.build-schedule-fields label { display:flex; align-items:center; gap:7px; color:var(--text); font-size:11px; }.build-schedule-fields { display:grid; grid-template-columns:1fr 1fr; gap:9px; margin-top:10px; }.build-schedule-fields > label { display:grid; gap:5px; color:var(--muted); }.build-schedule-days { grid-column:1/-1; display:flex; flex-wrap:wrap; gap:8px; }.build-schedule-days label { padding:5px 7px; border:1px solid var(--line); border-radius:6px; }.build-schedule-fields input[type="time"] { width:100%; }
+.build-persona-selector { display:grid; gap:6px; max-height:210px; overflow:auto; padding:2px; }.build-persona-selector__option { display:flex; align-items:center; gap:9px; padding:8px 9px; border:1px solid var(--line); border-radius:7px; color:var(--text); cursor:pointer; }.build-persona-selector__option:hover { background:var(--surface-raised); }.build-persona-selector__option input { flex:none; }.build-persona-selector__option span { display:grid; gap:2px; min-width:0; }.build-persona-selector__option strong { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; font-size:12px; }.build-persona-selector__option small { color:var(--muted); font-size:11px; }
 .runner-template-card__select { display:grid; gap:9px; width:100%; border:0; padding:0; color:inherit; text-align:left; background:transparent; cursor:pointer; }
 .create-mode-picker,.quick-start-picker,.quick-start-form { display:grid; gap:14px; }.create-mode-card,.quick-start-card { width:100%; border:1px solid var(--line); border-radius:10px; color:var(--text); background:var(--bg); text-align:left; cursor:pointer; transition:border-color .15s ease,background-color .15s ease; }.create-mode-card { display:grid; grid-template-columns:auto minmax(0,1fr) auto; align-items:center; gap:16px; min-height:104px; padding:20px; }.create-mode-card:hover,.quick-start-card:hover { border-color:var(--accent); background:var(--surface-raised); }.create-mode-card > svg:first-child,.quick-start-card > svg:first-child,.quick-start-form__heading > svg { color:var(--accent); }.create-mode-card span,.quick-start-card span,.quick-start-form__heading > div { display:grid; gap:5px; min-width:0; }.create-mode-card strong,.quick-start-card strong,.quick-start-form__heading strong { font-size:14px; }.create-mode-card small,.quick-start-card small,.quick-start-card em,.quick-start-form__heading p { color:var(--muted); font-size:11px; font-style:normal; line-height:1.5; }.quick-start-picker__head { display:flex; justify-content:space-between; gap:10px; }.quick-start-list { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; }.quick-start-card { display:grid; grid-template-columns:auto minmax(0,1fr); align-content:start; gap:12px; min-height:160px; padding:16px; }.quick-start-card > svg:last-child { display:none; }.quick-start-card em { font:10px 'DM Mono',monospace; }.quick-start-form__heading { display:flex; gap:11px; padding:13px; border:1px solid color-mix(in srgb,var(--accent) 45%,var(--line)); border-radius:8px; background:color-mix(in srgb,var(--accent) 7%,var(--bg)); }.quick-start-form__heading p { margin:0; }.quick-start-review { display:grid; gap:12px; padding:14px; border:1px solid var(--line); border-radius:8px; background:var(--bg); }.quick-start-review p { margin:0; color:var(--muted); font-size:12px; line-height:1.6; }.quick-start-review dl { display:grid; grid-template-columns:160px minmax(0,1fr); gap:9px; margin:0; font-size:12px; }.quick-start-review dt { color:var(--muted); }.quick-start-review dd { margin:0; overflow-wrap:anywhere; }
 .quick-start-workflow { display:grid; gap:8px; padding-top:2px; }.quick-start-workflow > strong { font-size:12px; }.quick-start-workflow > p,.quick-start-workflow .hint { margin:0; color:var(--muted); font-size:12px; line-height:1.6; }.quick-start-workflow .workflow-graph { height:300px; }
diff --git a/package.json b/package.json
index e2f75cf..cc311f2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openorbit",
-  "version": "0.12.2",
+  "version": "0.12.3",
   "description": "Open control plane for recurring AI automations",
   "license": "MIT",
   "type": "module",
diff --git a/pyproject.toml b/pyproject.toml
index c42e105..f139096 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "openorbit"
-version = "0.12.2"
+version = "0.12.3"
 description = "Open control plane for recurring AI automations"
 readme = "README.md"
 license = "MIT"
diff --git a/uv.lock b/uv.lock
index ac97859..8e265c9 100644
--- a/uv.lock
+++ b/uv.lock
@@ -950,7 +950,7 @@ wheels = [
 
 [[package]]
 name = "openorbit"
-version = "0.12.2"
+version = "0.12.3"
 source = { editable = "." }
 dependencies = [
     { name = "fastapi" },