From ce4e01ea9272fa54ca69447731ccf9b4c0afcb28 Mon Sep 17 00:00:00 2001
From: Hermes Agent <agent@hermes>
Date: Wed, 15 Apr 2026 19:06:54 +0000
Subject: [PATCH] chore: bump version to v0.50.51, update CHANGELOG

---
 CHANGELOG.md      | 5 +++++
 static/index.html | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f33c9a2..6602d46 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Hermes Web UI -- Changelog
 
+## [v0.50.51] — 2026-04-15
+
+### Fixed
+- **Orphaned tool messages** — conversation histories containing `role: tool` messages with no matching `tool_call_id` in a prior assistant message are now silently stripped before sending to the provider API. Fixes 400 errors from strictly-conformant providers (Mercury-2/Inception, newer OpenAI models). Adds 13 regression tests. (Fixes #534)
+
 ## [v0.50.50] — 2026-04-15
 
 ### Fixed
diff --git a/static/index.html b/static/index.html
index ef38643..347b366 100644
--- a/static/index.html
+++ b/static/index.html
@@ -552,7 +552,7 @@
                 <div class="settings-section-title">System</div>
                 <div class="settings-section-meta">Instance version and access controls.</div>
               </div>
-              <span class="settings-version-badge">v0.50.50</span>
+              <span class="settings-version-badge">v0.50.51</span>
             </div>
             <div class="settings-field" style="border-top:1px solid var(--border);padding-top:12px;margin-top:8px">
               <label for="settingsPassword" data-i18n="settings_label_password">Access Password</label>