feat: expand agents (10), skills (20), and hooks (11) with profile system

Agents:
- Add YAML frontmatter (model, tools) to all 7 existing agents
- New agents: planner (opus), build-error-resolver (sonnet), loop-operator (sonnet)

Skills:
- search-first: research before building (Adopt/Extend/Compose/Build)
- verification-loop: full quality gate pipeline (Build→TypeCheck→Lint→Test→Security→Diff)
- strategic-compact: when and how to run /compact effectively
- autonomous-loops: 6 patterns for autonomous agent workflows
- continuous-learning: extract session learnings into instincts

Hooks:
- Profile system (minimal/standard/strict) via run-with-profile.sh
- config-protection: block linter/formatter config edits (standard)
- suggest-compact: remind about /compact every ~50 tool calls (standard)
- auto-tmux-dev: suggest tmux for dev servers (standard)
- session-save/session-load: persist and restore session context (Stop/SessionStart)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/hooks/session-save.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Save session context on stop for restoration in next session
+# Event: Stop
+# Saves: branch, modified files, recent commits, phase
+
+SESSION_DIR="${CLAUDE_PROJECT_DIR:-.}/.claude/sessions"
+mkdir -p "$SESSION_DIR"
+
+SESSION_FILE="$SESSION_DIR/latest.json"
+
+# Gather session state
+BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
+MODIFIED=$(git diff --name-only 2>/dev/null | head -20 | jq -R -s 'split("\n") | map(select(. != ""))')
+STAGED=$(git diff --cached --name-only 2>/dev/null | head -20 | jq -R -s 'split("\n") | map(select(. != ""))')
+RECENT_COMMITS=$(git log --oneline -5 2>/dev/null | jq -R -s 'split("\n") | map(select(. != ""))')
+PHASE=$(grep -m1 'Current Phase' "${CLAUDE_PROJECT_DIR:-.}/docs/phases-plan.md" 2>/dev/null || echo "unknown")
+TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+
+# Write session file
+cat > "$SESSION_FILE" << ENDJSON
+{
+  "timestamp": "$TIMESTAMP",
+  "branch": "$BRANCH",
+  "phase": "$PHASE",
+  "modified_files": $MODIFIED,
+  "staged_files": $STAGED,
+  "recent_commits": $RECENT_COMMITS
+}
+ENDJSON
+
+exit 0