chore: bootstrap repo with chunks 1 and 2

Establishes the global AI development config repo from scratch:

- Chunk 1: repo skeleton, install.sh, statusline, deploy manifest
- Chunk 2: core instructions (coding/git/testing), CLAUDE.md rewrite
  (always-on + content index two-tier model), docs restructure,
  6 ADRs, ROADMAP.md, .gitkeep placeholders
- Bootstrap skills in .claude/skills/ (to be catalogued and migrated
  to .agents/skills/ in Chunk 3)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test-install.sh

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+PASS=0
+FAIL=0
+
+pass() { echo "  PASS: $1"; PASS=$((PASS + 1)); }
+fail() { echo "  FAIL: $1"; FAIL=$((FAIL + 1)); }
+
+TEMP_HOME="$(mktemp -d)"
+trap 'rm -rf "$TEMP_HOME"' EXIT
+
+echo "Running install.sh..."
+HOME="$TEMP_HOME" bash "$REPO_ROOT/scripts/install.sh" > /dev/null
+
+echo ""
+echo "--- providers/claude-code/ → ~/.claude/ ---"
+while IFS= read -r -d '' src; do
+    rel="${src#"$REPO_ROOT/providers/claude-code/"}"
+    dest="$TEMP_HOME/.claude/$rel"
+    if diff -q "$src" "$dest" > /dev/null 2>&1; then
+        pass "$rel deployed and matches source"
+    else
+        fail "$rel — missing or differs from source"
+    fi
+done < <(find "$REPO_ROOT/providers/claude-code" -type f -print0)
+
+echo ""
+echo "--- core/ → ~/.claude/core/ ---"
+while IFS= read -r -d '' src; do
+    rel="${src#"$REPO_ROOT/core/"}"
+    dest="$TEMP_HOME/.claude/core/$rel"
+    if diff -q "$src" "$dest" > /dev/null 2>&1; then
+        pass "$rel deployed and matches source"
+    else
+        fail "$rel — missing or differs from source"
+    fi
+done < <(find "$REPO_ROOT/core" -type f -print0)
+
+echo ""
+echo "--- no orphaned files in core/ ---"
+while IFS= read -r -d '' deployed; do
+    rel="${deployed#"$TEMP_HOME/.claude/core/"}"
+    src="$REPO_ROOT/core/$rel"
+    if [[ -f "$src" ]]; then
+        pass "core/$rel has a source file"
+    else
+        fail "core/$rel is orphaned — deleted from source but still deployed"
+    fi
+done < <(find "$TEMP_HOME/.claude/core" -type f -print0)
+
+echo ""
+echo "--- directories ---"
+if [[ -d "$TEMP_HOME/.agents/skills" ]]; then
+    pass "~/.agents/skills/ created"
+else
+    fail "~/.agents/skills/ not found"
+fi
+
+echo ""
+echo "--- idempotency ---"
+if HOME="$TEMP_HOME" bash "$REPO_ROOT/scripts/install.sh" > /dev/null 2>&1; then
+    pass "second run exits zero"
+else
+    fail "second run failed"
+fi
+
+echo ""
+echo "Results: $PASS passed, $FAIL failed"
+[[ $FAIL -eq 0 ]]