docs(changelog): the 10.4.13 note, curated

CHANGELOG.md

@@ -3,6 +3,13 @@
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
 
+### [10.4.13](https://source.soulcraft.com/soulcraftlabs/open-brainy/compare/v10.4.12...v10.4.13) (2026-09-03)
+
+- A shutdown that holds its listener until the exit decision, and a test suite that closes every brain it opens
+- fix(shutdown): the engine's signal handler keeps its listener registered until the exit decision is made — closing the last live instance no longer deregisters the handler mid-run, so a second signal delivery during a clean shutdown can never kill the process after the work is done (a2ea21b3)
+- fix(release): the release wall entry commits under an explicit git identity read from the developer's checkout; a host with no identity refuses by name instead of failing inside git (aac853d3)
+- test(hygiene): every brain a test file creates is closed by that file — 40 files fixed, the leaks that let a stray cadence narrate into later files are gone; brains whose init() was expected to fail are closed too (6eb5e448)
+
 ### [10.4.12](https://source.soulcraft.com/soulcraftlabs/open-brainy/compare/v10.4.11...v10.4.12) (2026-09-03)
 
 - Mixed-kind fields index exactly, arrays to 256, a drained loop is not a shutdown, and finds project from the column store