chore: commit SPEC.md drift

Signed-off-by: Shafqat Ullah <shafqat@sourcevo.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: shafqatevo

.planning/SPEC.md

@@ -242,6 +242,7 @@ to earn the provenance trust that claw-code lacks.
 ## Implementations
 
 <!-- Populated automatically by SB pr-traceability.sh hook post-merge. -->
+- PR: https://github.com/alo-exp/kay/pull/5 | Date: 2026-04-21 | Spec-version: 1
 - PR: https://github.com/alo-exp/kay/pull/4 | Date: 2026-04-21 | Spec-version: 1
 
 - 2026-04-19 — Phase 1 shipped as `v0.0.1` (commit `22890ad`, tag