chore: add changeset and release notes for search score removal

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

Author: prosdev

.changeset/drop-search-scores.md

@@ -0,0 +1,5 @@
+---
+"@prosdevlab/dev-agent": patch
+---
+
+Remove misleading similarity scores from MCP search results. Search output now shows ranked results without percentages, matching industry practice (Sourcegraph Cody, Cursor, GitHub Copilot). Also fixes dev_refs failing to find symbols due to SearchService defaulting scoreThreshold to 0.7 which silently filtered all RRF results.

website/content/latest-version.ts

@@ -4,10 +4,10 @@
  */
 
 export const latestVersion = {
-  version: '0.12.0',
-  title: 'Go Callees + Rust Language Support',
+  version: '0.12.1',
+  title: 'Cleaner Search Output + refs Fix',
   date: 'April 1, 2026',
   summary:
-    'Index Rust codebases — functions, structs, traits, impl methods, callees. Go call graph tracing. All MCP tools work with both languages.',
-  link: '/updates#v0120--go-callees--rust-language-support',
+    'MCP search results drop misleading scores, add result preamble, and fix dev_refs silently returning no results.',
+  link: '/updates#v0121--cleaner-search-output--refs-fix',
 } as const;

website/content/updates/index.mdx

@@ -9,6 +9,20 @@ What's new in dev-agent. We ship improvements regularly to help AI assistants un
 
 ---
 
+## v0.12.1 — Cleaner Search Output + refs Fix
+
+*April 1, 2026*
+
+**MCP search results now match industry best practices.**
+
+- **Drop misleading scores:** search results no longer show RRF fusion percentages (always ~1-2%). Results are ranked by position, matching Sourcegraph Cody, Cursor, and GitHub Copilot
+- **Result preamble:** search output starts with `Found N results for "query" | showing top K`
+- **Fix dev_refs via MCP:** `SearchService` defaulted `scoreThreshold` to 0.7, silently filtering all results since RRF scores are ~0.01. Now defaults to 0
+- **Remove `scoreThreshold` from MCP tool schema:** agents can no longer pass a threshold that doesn't work with RRF scores. Core API retains it for CLI use
+- **Better empty results:** suggests `dev_map` when no results found
+
+---
+
 ## v0.12.0 — Go Callees + Rust Language Support
 
 *April 1, 2026*