chore(release): prepare v0.15.9

AGENTS.md

@@ -0,0 +1,12 @@
+# Repository instructions
+
+## Desktop release signing
+
+Every desktop CLI release must be signed with Minisign by the `release` GitHub Actions environment. The release workflow must read these environment secrets:
+
+- `VERBOO_DESKTOP_MINISIGN_SECRET_KEY_B64`: the complete Minisign secret-key file encoded as single-line base64.
+- `VERBOO_DESKTOP_MINISIGN_PUBLIC_KEY`: the complete two-line Minisign public-key file.
+
+Before publishing a version, confirm that both secret names exist in the `release` environment and that the desktop signing job is enabled. A missing signing configuration must fail the release; never publish unsigned desktop CLI update assets.
+
+Never print, log, commit, upload as an artifact, or send the private key or its base64 value. Do not rotate or replace the signing pair as part of a routine release. Follow `docs/desktop-cli-distribution.md` for publishing, verification, rotation, and compromise handling.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@verboo/code",
-  "version": "0.15.8",
+  "version": "0.15.9",
   "description": "Verboo Code — coding agent for the Verboo platform",
   "type": "module",
   "bin": {