[systemd] Restore claude-save timer and make targets

The claude and claude-save Makefile targets and both unit files were
dropped when master was rewound upstream, leaving only the enable
symlink in timers.target.wants pointing at a missing unit. The timer
kept firing every 30 minutes and failing with "No rule to make target
'claude-save'", so session state stopped syncing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Makefile

@@ -1,7 +1,13 @@
-.PHONY: os stow deps
+.PHONY: all os stow deps claude claude-save
 
 OS_NAME := $(shell uname -s | tr A-Z a-z)
 
+CLAUDE_HISTORY_REPO := git@git.service:secstate/claude-history
+CLAUDE_HISTORY_DIR  := $(HOME)/.claude-history
+CLAUDE_HISTORY_PATHS := projects plans tasks history.jsonl
+
+all: stow claude
+
 stow:
 	mkdir -p ~/.gnupg && chmod 0700 ~/.gnupg
 	stow -t ~ */
@@ -18,3 +24,38 @@ deps:
 
 os:
 	@echo $(OS_NAME)
+
+# Clone the private session-state repo and symlink it into ~/.claude so Claude
+# Code resumes prior sessions. Sessions only match when the checkout path is
+# identical to the one recorded in the project directory name.
+claude:
+	@test -d $(CLAUDE_HISTORY_DIR) || git clone $(CLAUDE_HISTORY_REPO) $(CLAUDE_HISTORY_DIR)
+	@mkdir -p ~/.claude
+	@for p in $(CLAUDE_HISTORY_PATHS); do \
+		test -e $(CLAUDE_HISTORY_DIR)/$$p || continue; \
+		test -L ~/.claude/$$p && continue; \
+		if [ -e ~/.claude/$$p ]; then \
+			echo "claude: ~/.claude/$$p exists and is not a symlink, leaving it alone"; \
+			continue; \
+		fi; \
+		ln -s $(CLAUDE_HISTORY_DIR)/$$p ~/.claude/$$p; \
+		echo "claude: linked $$p"; \
+	done
+	@if [ $(OS_NAME) = "linux" ]; then \
+		systemctl --user daemon-reload && \
+		systemctl --user enable --now claude-save.timer; \
+	fi
+
+claude-save:
+	@cd $(CLAUDE_HISTORY_DIR) && \
+		git add -A && \
+		if git diff --cached --quiet; then \
+			echo "claude-save: nothing to commit"; \
+		else \
+			git commit -qm "Sync session state" && echo "claude-save: committed"; \
+		fi && \
+		if git remote get-url origin >/dev/null 2>&1; then \
+			git push -q && echo "claude-save: pushed"; \
+		else \
+			echo "claude-save: no origin remote, skipping push"; \
+		fi

systemd/.config/systemd/user/claude-save.service

@@ -0,0 +1,7 @@
+[Unit]
+Description="Commit and push Claude Code session state"
+Requires=claude-save.timer
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/make -C %h/.dotfiles claude-save

systemd/.config/systemd/user/claude-save.timer

@@ -0,0 +1,11 @@
+[Unit]
+Description="Timer for saving Claude Code session state"
+
+[Timer]
+Unit=claude-save.service
+OnBootSec=5m
+OnCalendar=*:0/30
+Persistent=true
+
+[Install]
+WantedBy=timers.target