v0.1.0

The first release. Supervision runs on Linux and macOS; on other platforms the
config commands work and the runtime reports UnsupportedPlatform.

Configuration

• servicrab.toml with a validated schema: project metadata, services,
  dependencies, environments, health checks, log settings and watch rules.
  Unknown keys are rejected rather than silently ignored.
• servicrab init writes an annotated example config; servicrab check
  validates one; servicrab list prints the services and their policies.
• Per-project and per-service env_file layering on top of the process
  environment.
• Dependency declarations with a deterministic topological start order and
  cycle detection.

Running services

• servicrab run <SERVICE> supervises one service in the foreground.
• servicrab up [SERVICE...] supervises a whole stack: dependency-ordered
  start, interleaved and colour-prefixed output, reverse-order shutdown,
  --abort-on-failure.
• servicrab watch restarts services when their watched files change, with
  ignore rules and debouncing.
• Restart policies never, on-failure and always, with exponential
  backoff, a restart ceiling, and a stability window.
• Per-service process groups: shutdown signals the whole group and escalates
  to SIGKILL after shutdown_timeout, so no orphans are left behind.
• Health checks (command, http, tcp) with readiness gating for
  dependents and automatic restart of unhealthy services.

Logs

• Opt-in capture to <dir>/<service>.log with size-based rotation, and a
  per-service opt-out.
• servicrab logs [SERVICE...] [-f] [-n N] reads and follows them.

Background daemon

• servicrab start / status / stop / restart / down / daemon,
  one detached daemon per project.
• A documented newline-delimited JSON protocol over a Unix socket, published
  as the servicrab-protocol crate.
• servicrab reload applies config changes to a running stack without
  touching the services that did not change; an invalid config is refused and
  leaves the stack running.
• servicrab events follows the daemon's live event stream, as text or JSON,
  optionally filtered by service.

Platform integration

• servicrab generate systemd|launchd writes a unit that runs the stack, with
  systemctl reload wired to servicrab reload.
• servicrab completions <SHELL> for bash, zsh, fish, PowerShell and elvish.
• servicrab up --json and servicrab watch --json emit the same event lines
  the daemon streams, for scripts and wrappers.