diff --git a/CHANGELOG.md b/CHANGELOG.md
index f212447..0351600 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,16 @@
All notable changes to iNTERCEPT will be documented in this file.
+## [2.28.0] - 2026-07-05
+
+### Added
+- **Signal ID** — Offline signal identification against a bundled 594-signal database (seeded from SigID Wiki via Artemis-DB). Match an unknown signal by frequency, bandwidth, and modulation; results are ranked 0–100 with match reasons and SigID Wiki links.
+- **Signal ID modal** — Standalone overlay (`SignalIdModal`) accessible from a new "Signal ID" button in the global nav Intel group, and from a dedicated "Identify Signal" button in the waterfall sidebar. Pre-populates from the current waterfall frequency when opened from there; accepts manual entry from the nav.
+- **`POST /signalid/match` route** — Scored matching API with 60-second in-process cache. Scores frequency centrality (40 pts), bandwidth match (30 pts), modulation match (20 pts), and region match (10 pts). Returns ranked matches with `match_reasons` annotations.
+- **`bin/import_artemis.py`** — One-command database refresh script. Downloads the latest Artemis-DB tar (~300 MB), extracts it, and merges new signals into `data/signals.json`. Run with `python3 bin/import_artemis.py --download`.
+
+---
+
## [2.27.0] - 2026-05-20
### Fixed
diff --git a/config.py b/config.py
index 0dab766..d09c2e4 100644
--- a/config.py
+++ b/config.py
@@ -7,10 +7,20 @@ import os
import sys
# Application version
-VERSION = "2.27.0"
+VERSION = "2.28.0"
# Changelog - latest release notes (shown on welcome screen)
CHANGELOG = [
+ {
+ "version": "2.28.0",
+ "date": "July 2026",
+ "highlights": [
+ "Feat: Signal ID — offline signal identification against a bundled 594-signal database",
+ "Feat: Signal ID modal accessible from the global nav and waterfall sidebar",
+ "Feat: scored matching by frequency, bandwidth, modulation, and region (0–100)",
+ "Feat: import script (bin/import_artemis.py) to refresh database from Artemis-DB",
+ ],
+ },
{
"version": "2.27.0",
"date": "May 2026",
diff --git a/docs/index.html b/docs/index.html
index 0d90a35..cc97756 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -97,6 +97,11 @@
CW/Morse Decoder
Morse code decoding with custom Goertzel tone detection for CW and OOK/AM envelope detection for ISM band signals.
+
+
+
Signal ID
+
Identify unknown signals offline against a bundled 594-signal database. Scored matching by frequency, bandwidth, and modulation with SigID Wiki references.