feat(cmd): add installall/uninstallall; fix startall/stopall and service lifecycle

- startall now uses systemctl start (not enable --now)
- stopall now uses systemctl stop (not disable --now)
- add installall command (bulk install with --dry-run support)
- add uninstallall command (bulk disable+remove in reverse order)
- fix docker ExecStart to use -a flag so the process stays attached
- prefix ExecStop with - so a stop-on-already-dead container does not fail the unit

AGENTS.md

@@ -0,0 +1,92 @@
+## Project Overview
+
+**Unitdore** is a Go CLI tool that bridges container runtimes (Podman, Docker) and systemd. It discovers running containers, stores them in a YAML config, and generates + manages systemd `.service` unit files for each one.
+
+# Agent Rules
+
+Keep answers short. Question everything, never assume or guess. Ask if unsure.
+You must use the AMCS MCP system tools. Set **unitdore** as the active project and always capture summaries of what was done as thoughts using the `capture_thought` tool. If AMCS is not available, write files to `docs/llm/log/yyyymmdd_hh.md`.
+
+# Tools to use
+
+When writing Go: `doc/tools/go-skill.md` (if present), otherwise follow standard Go conventions.
+
+## Commands
+
+```bash
+make build          # Compile binary: ./unitdore
+make install        # Install binary to /usr/bin, man page, create /etc/unitdore
+make uninstall      # Remove binary and man page
+make test           # go test ./... -v
+make test-short     # go test ./...
+make lint           # go vet ./...
+make clean          # Remove built binary
+make release-version  # Bump patch version, commit, tag, and push
+```
+
+## Architecture
+
+```
+cmd/           # Cobra commands (edit, install, list, root, start, startall,
+               #   status, stop, stopall, syncup, uninstall, update)
+config/        # Config struct + YAML load/save (units.yaml)
+runtime/       # Docker and Podman runtime abstraction
+systemd/       # .service file generator and systemd manager
+docs/          # generated-units.md (unit file examples), unitdore.1 (man page)
+```
+
+### Key packages
+
+- **`config`** — `Unit` and `Config` structs; `Load`, `Save`, `FindUnit`, `AddUnit`
+- **`runtime`** — `ContainerRuntime` interface; `docker.go`, `podman.go` implementations
+- **`systemd`** — `generator.go` builds `.service` file content; `manager.go` calls `systemctl`
+
+### Config file
+
+**Location:** `/etc/unitdore/units.yaml`
+
+```yaml
+prefix: ""      # prepended to service file name (e.g. "prod-")
+suffix: ""      # appended to service file name (e.g. "-svc")
+
+units:
+  - name: nginx
+    runtime: podman        # podman | docker
+    user: ""               # empty = system unit; set for rootless user unit
+    command: ""            # override ExecStart entirely
+    order: 1               # startup order, lower = earlier; same = parallel
+    delay: 0s              # delay after previous order group
+    enabled: true
+    disabled_reason: ""    # auto-set by syncup reconciliation
+    restart: false         # Restart=on-failure
+    restart_sec: 0         # RestartSec
+    restart_retries: 0     # StartLimitBurst
+```
+
+### Generated service file locations
+
+| Scenario | Path |
+|---|---|
+| System unit (root) | `/etc/systemd/system/unitdore-<name>.service` |
+| User unit | `/home/<user>/.config/systemd/user/unitdore-<name>.service` |
+| With prefix `prod-` | `/etc/systemd/system/unitdore-prod-<name>.service` |
+| With suffix `-svc` | `/etc/systemd/system/unitdore-<name>-svc.service` |
+
+### Libraries
+
+- `github.com/spf13/cobra` — CLI framework
+- `gopkg.in/yaml.v3` — config parsing
+
+## Testing
+
+Tests exist in:
+- `config/config_test.go`
+- `runtime/runtime_test.go`
+- `systemd/generator_test.go`
+
+Always run `make test` before marking a task complete. Add tests for new behaviour in the same package as the code under test.
+
+## Additional documentation
+
+- `docs/generated-units.md` — full annotated examples of every generated unit file combination
+- `docs/unitdore.1` — man page