news: add entry about the unification of agents "context" and "skills"

modules/misc/news/2026/04/2026-04-08_12-00-00.nix

@@ -0,0 +1,29 @@
+{ config, ... }:
+{
+  time = "2026-04-08T12:00:00+00:00";
+  condition =
+    config.programs.claude-code.enable
+    || config.programs.codex.enable
+    || config.programs.opencode.enable
+    || config.programs.gemini-cli.enable;
+  message = ''
+    The Claude Code, Codex, and OpenCode modules now expose a canonical
+    `context` option for configuring their global assistant instructions.
+
+    The old option names still work for now and emit migration warnings:
+    - `programs.claude-code.memory.text` and `programs.claude-code.memory.source`
+      were changed to `programs.claude-code.context`
+    - `programs.codex.custom-instructions` was renamed to
+      `programs.codex.context`
+    - `programs.opencode.rules` was renamed to `programs.opencode.context`
+
+    Claude Code skills were also unified with the other assistant modules:
+    `programs.claude-code.skills` now accepts either an attribute set or a
+    directory path, and `programs.claude-code.skillsDir` was changed to
+    `programs.claude-code.skills`.
+
+    The `programs.gemini-cli.skills` option now also accepts a directory
+    path, matching the bulk skill-directory workflow supported by the
+    other assistant modules.
+  '';
+}