v0.8.0

Fleet engine: tesserae engine --all runs every project registered in ~/.tesserae/registry.json from one process — per-project engine units with registry hot-reload (register/unregister takes effect live, moved roots restart, dead units revive), fleet-wide compile throttling via --compile-slots (default 1) that respects shared LLM account rate limits and composes with v0.7.2's per-project compile lock, a race-free global pidfile (O_EXCL under a sidecar flock, owner-checked removal), shutdown that never abandons a compile mid-write, and a registry that can be corrupt or malformed without killing running units. Hardened through three rounds of Codex xhigh adversarial review plus a local round-4 verification (#33). Single-project tesserae engine --project behavior is unchanged.

Full notes: docs/release-notes/v0.8.0.md