docs(agents): point at the Modesty reference clone

The island work borrows Modesty's ideas. A local clone makes it reachable
from later sessions, and the note carries the licence constraint with it:
Modesty is GPLv3, this repo GPLv2-only, so it is read and never copied.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/AGENTS.md b/AGENTS.md
index af8e749..d81c83c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -18,6 +18,15 @@ them runs alone, and running one does not require the others. One of them,
 They are started from `~/.config/hypr/sections/autostart.lua` and keep running
 for the whole session.
 
+## Reference: Modesty
+
+The island, control panel and calendar work follows the model of
+[Modesty](https://github.com/sandeepbist/Modesty), a Quickshell desktop. A
+clone lives at `~/Programming/GIT/GITHUB/Modesty`; `git pull` it before
+relying on it. **It is GPLv3 and this repo is GPLv2-only: read it for ideas,
+never copy code from it.** The roadmap and the reasons behind it are in
+`docs/superpowers/specs/2026-10-07-island-core-design.md`.
+
 ## The rule that bites first
 
 **A quickshell config with no visible window exits.** These components are