app_icons: register habit_stack with a new chain-link glyph; whitelist it

New Flutter app (~/habit_stack) gets an on-style launcher icon from the
shared family: two interlocking stadium-ring outlines, sized so the
72px stroke leaves a genuinely hollow interior at launcher size. Accent
matches the app's own ThemeData seedColor (#66BB6A), not already
claimed by a sibling app.

Also whitelists com.kuhy.habit_stack in phone_focus_mode/config.sh (both
the always-on productive-apps list and the night/curfew health-tool
list) and redeploys, since an unwhitelisted com.kuhy.* app is killed
within ~1s and would otherwise look like an install failure.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/superpowers/evidence/habit-stack-icon-2026-07-20.json

@@ -0,0 +1,40 @@
+{
+  "intent": "Register a new app_icons entry for habit_stack (a new Flutter app) so it gets an on-style launcher icon from the shared family, and whitelist its package id in phone_focus_mode so the app isn't killed on-device.",
+  "scope": [
+    "python_pkg/app_icons/glyphs.py",
+    "python_pkg/app_icons/apps.py",
+    "phone_focus_mode/config.sh",
+    "No changes to any other package's behavior"
+  ],
+  "changes": [
+    "Added a new chain-link glyph (_CHAIN_LINK) to glyphs.py: two interlocking stadium-ring outlines, sized so the 72px stroke leaves a genuinely hollow interior at launcher size",
+    "Registered habit_stack in apps.py's APPS dict (accent #66BB6A matching the app's own ThemeData seedColor, glyph chain-link, icon_name habit-stack, linux=False)",
+    "Added com.kuhy.habit_stack to phone_focus_mode/config.sh in both places a companion-app package id needs to appear (the always-on productive-apps whitelist and the night/curfew health-tool whitelist), then redeployed to the phone"
+  ],
+  "verification": [
+    {
+      "command": "source .venv/bin/activate && python3 meta/scripts/pytest_changed_packages.py <changed files>",
+      "result": "pass",
+      "evidence": "877 passed in 1.91s; TOTAL coverage 100.00% (2816 stmts, 758 branches, 0 missed). Note: an earlier run against the pyenv global Python (not this repo's .venv) spuriously failed on a missing markdownify import in the unrelated archwiki_rag package -- confirmed pre-existing and environment-only, not a real gap; re-running via .venv resolved it."
+    },
+    {
+      "command": "PYTHONPATH=~/testsAndMisc python3 -m python_pkg.app_icons preview -o <scratch>/icon_sheet.png",
+      "result": "pass",
+      "evidence": "Visual review of the generated contact sheet (full size, circle-masked, 48dp) confirmed the chain-link glyph reads clearly as two interlocking rings at all three sizes, no safe-box warnings from the CLI"
+    },
+    {
+      "command": "ADB_SERIAL=BL9000EEA0000102 bash phone_focus_mode/deploy.sh",
+      "result": "pass",
+      "evidence": "Deploy completed successfully; config.sh (including the new com.kuhy.habit_stack entries) pushed to device and daemon restarted"
+    }
+  ],
+  "risks": [
+    "New glyph geometry was hand-derived (stroke width vs. ring interior hollow space); mitigated by visual review of the actual rendered preview sheet before committing to the design",
+    "phone_focus_mode/config.sh is a live-deployed config; a bad edit could affect other whitelisted apps -- mitigated by adding only new lines, never touching existing entries, and confirming via deploy.sh's own status output that other apps' whitelist state was unaffected"
+  ],
+  "rollback": [
+    "git revert this commit",
+    "Re-run PYTHONPATH=~/testsAndMisc python3 -m python_pkg.app_icons generate --app habit_stack --android is then a no-op since the app entry no longer exists; the habit_stack repo's already-generated assets/icon/ files are unaffected (that's a separate repo)",
+    "Redeploy phone_focus_mode (ADB_SERIAL=BL9000EEA0000102 bash phone_focus_mode/deploy.sh) to push the reverted config.sh back to the phone"
+  ]
+}

phone_focus_mode/config.sh

@@ -338,6 +338,7 @@ com.kuhy.focusstatus
 com.stronglifts.app
 com.kuhy.workout_app
 com.kuhy.diet_guard_app
+com.kuhy.habit_stack
 com.shazam.android
 com.ichi2.anki
 com.metrolist.music
@@ -537,6 +538,9 @@ dev.kuhy.todo
 # --- Diet guard companion (log meals; health tool, not a scroll trap) ---
 com.kuhy.diet_guard_app
 
+# --- Habit Stack companion (habit tracking; health tool, not a scroll trap) ---
+com.kuhy.habit_stack
+
 # --- Good-for-you apps (not scroll traps; kept per your request) ---
 # Remove any of these if you want a stricter night.
 com.stronglifts.app

python_pkg/app_icons/apps.py

@@ -87,6 +87,14 @@ APPS: Final[dict[str, AppIcon]] = {
             icon_name="todo",
             linux=True,
         ),
+        AppIcon(
+            key="habit_stack",
+            repo=_HOME / "habit_stack",
+            accent="#66BB6A",
+            glyph="chain-link",
+            icon_name="habit-stack",
+            linux=False,
+        ),
     )
 }
 

python_pkg/app_icons/glyphs.py

@@ -78,6 +78,20 @@ _CHECKLIST = """\
     <path d="M 272 620 L 346 694 L 478 562"/>
     <path d="M 594 648 L 752 648"/>"""
 
+# Two interlocking stadium (pill-ring) outlines, both rotated -45 deg and
+# offset along the anti-diagonal so their strokes overlap in the middle --
+# reads as both "habit-stacking" (linked items) and "don't break the chain".
+# Ring height is tall enough that the 72px stroke leaves a genuinely hollow
+# interior (height - 2*stroke-width well above MIN_NEGATIVE_SPACE); a
+# shorter ring's stroke fills the interior solid and reads as a blob.
+_CHAIN_LINK = """\
+    <g transform="translate(467,557) rotate(-45) translate(-150,-110)">
+      <rect x="0" y="0" width="300" height="220" rx="110" ry="110"/>
+    </g>
+    <g transform="translate(557,467) rotate(-45) translate(-150,-110)">
+      <rect x="0" y="0" width="300" height="220" rx="110" ry="110"/>
+    </g>"""
+
 
 GLYPHS: Final[dict[str, Glyph]] = {
     glyph.name: glyph
@@ -87,6 +101,7 @@ GLYPHS: Final[dict[str, Glyph]] = {
         Glyph("clock", "Clock face with hands", _CLOCK),
         Glyph("shield-cutlery", "Shield guarding a fork and knife", _SHIELD_CUTLERY),
         Glyph("checklist", "Two ticked-off list rows", _CHECKLIST),
+        Glyph("chain-link", "Two interlocking chain links", _CHAIN_LINK),
     )
 }