diff --git a/CHANGELOG.md b/CHANGELOG.md
index e63c913cd09..46c421ba554 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -56,6 +56,13 @@ and this project adheres to
 [#2391]: https://github.com/AdguardTeam/AdGuardHome/issues/2391
 [#2394]: https://github.com/AdguardTeam/AdGuardHome/issues/2394
 
+### Deprecated
+
+- _Go_ 1.14 support.  v0.106.0 will require at least _Go_ 1.15 to build.
+- The `darwin/386` port.  It will be removed in v0.106.0.
+- The `"rule"` and `"filter_id"` fields in `GET /filtering/check_host` and
+  `GET /querylog` responses.  They will be removed in v0.106.0 ([#2102]).
+
 ### Fixed
 
 - Inability to set DNS cache TTL limits ([#2459]).
diff --git a/HACKING.md b/HACKING.md
index a16d6496de0..237e554f1df 100644
--- a/HACKING.md
+++ b/HACKING.md
@@ -70,6 +70,14 @@ The rules are mostly sorted in the alphabetical order.
     func TestType_Method_suffix(t *testing.T) { /* … */ }
     ```
 
+ *  Name parameters in interface definitions:
+
+   ```go
+   type Frobulator interface {
+           Frobulate(f Foo, b Bar) (r Result, err error)
+   }
+   ```
+
  *  Name the deferred errors (e.g. when closing something) `cerr`.
 
  *  No shadowing, since it can often lead to subtle bugs, especially with
@@ -172,10 +180,15 @@ The rules are mostly sorted in the alphabetical order.
  *  Put utility flags in the ASCII order and **don't** group them together.  For
     example, `ls -1 -A -q`.
 
- *  `snake_case`, not `camelCase`.
+ *  `snake_case`, not `camelCase` for variables.  `kebab-case` for filenames.
+
+ *  UPPERCASE names for external exported variables, lowercase for local,
+    unexported ones.
 
  *  Use `set -e -f -u` and also `set -x` in verbose mode.
 
+ *  Use `readonly` liberally.
+
  *  Use the `"$var"` form instead of the `$var` form, unless word splitting is
     required.