diff --git a/TODO b/TODO
index b9e1ed8..6840657 100644
--- a/TODO
+++ b/TODO
@@ -31,3 +31,18 @@ Description: Turn the flat trainer scripts into an installable tiararodney.sekft
              posix-sdc dependency and an optional gpu extra, console scripts, a
              Pipfile pinning posix-sdc as a local editable override, and tox
              environments.
+
+--ISSUE
+Content-Type: application/issue
+ID: 2
+Type: feature
+Title: SFT trainer with chat-template render and assistant-only mask
+Status: open
+Priority: medium
+Created: 2026-06-16
+Module: sekft
+Relationships: 
+Description: Add the supervised fine-tuner: render trajectories through the
+             tokenizer's own chat template (matching serving), canonicalise
+             turns (fold system, merge consecutive), derive an assistant-only
+             loss mask by token-prefix differencing, and train a QLoRA adapter.