chore(mam): update Multi-Agent Mux orchestration skills and configuration

- Safely execute .mam_deploy/update.sh to fetch and deploy latest MAM orchestration tools
- Update .mam.env.example and clean up deprecated generate-env.sh

.mam.env.example

@@ -129,8 +129,8 @@
 # SKS_EMPTY_GIVEUP=3
 
 # Minimum columns a pane must retain after a vertical split (2xK layout engine).
-#default: 60
+#default: 40
-# MAM_MIN_PANE_COLS=60
+# MAM_MIN_PANE_COLS=40
 
 # Minimum rows a pane must retain after a horizontal split (2xK layout engine).
 #default: 20

scripts/generate-env.sh

@@ -1,67 +0,0 @@
-#!/usr/bin/env bash
-# generate-env.sh — create a local .mam.env from the committed .mam.env.example template.
-#
-# Behaviour:
-#   - .mam.env absent            → copy .mam.env.example to .mam.env, print the path.
-#   - .mam.env present           → no-op (leaves your edits intact), exit 0.
-#   - .mam.env present --force    → overwrite .mam.env from .mam.env.example (backs up to .mam.env.bak).
-#   - --migrate-legacy           → explicitly rename existing .env to .mam.env if absent.
-#
-# Paths are resolved relative to this script (repo root = parent of deploy/),
-# so it works regardless of the caller's cwd.
-#
-# Usage: deploy/generate-env.sh [--force] [--migrate-legacy] [-h|--help]
-set -euo pipefail
-
-REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
-SRC="$REPO_ROOT/.mam.env.example"
-DST="$REPO_ROOT/.mam.env"
-LEGACY_ENV="$REPO_ROOT/.env"
-
-FORCE=0
-MIGRATE=0
-while [ $# -gt 0 ]; do
-  case "$1" in
-    --force) FORCE=1; shift ;;
-    --migrate-legacy) MIGRATE=1; shift ;;
-    -h|--help)
-      echo "Usage: $0 [--force] [--migrate-legacy]"
-      echo "  Create .mam.env from .mam.env.example."
-      echo "  --force           overwrites an existing .mam.env (backs up to .mam.env.bak)."
-      echo "  --migrate-legacy  explicitly renames an existing legacy .env to .mam.env."
-      exit 0 ;;
-    *) echo "ERROR: unknown arg: $1" >&2; echo "Usage: $0 [--force] [--migrate-legacy]" >&2; exit 2 ;;
-  esac
-done
-
-if [ "$MIGRATE" = "1" ]; then
-  if [ -f "$DST" ]; then
-    echo "ERROR: cannot migrate: $DST already exists." >&2
-    exit 1
-  fi
-  if [ ! -f "$LEGACY_ENV" ]; then
-    echo "ERROR: cannot migrate: legacy file $LEGACY_ENV not found." >&2
-    exit 1
-  fi
-  mv -f "$LEGACY_ENV" "$DST"
-  chmod 0600 "$DST" 2>/dev/null || true
-  echo "migrated: $LEGACY_ENV -> $DST"
-  exit 0
-fi
-
-[ -f "$SRC" ] || { echo "ERROR: template not found: $SRC" >&2; exit 1; }
-
-if [ -f "$DST" ] && [ "$FORCE" != "1" ]; then
-  echo "no-op: $DST already exists (use --force to overwrite)"
-  exit 0
-fi
-
-if [ -f "$DST" ] && [ "$FORCE" = "1" ]; then
-  cp -p "$DST" "$DST.bak"
-  echo "backed up existing .mam.env -> $DST.bak"
-fi
-
-cp "$SRC" "$DST"
-chmod 0600 "$DST" 2>/dev/null || true
-echo "created: $DST"
-echo "Next: edit $DST and fill in any secrets (look for 'replace_me')."