v0.8.0 - GPT-5.6 orchestration and bounded runtime histories

Highlights

• Added exact-route GPT-5.6-family capability discovery and unified /think / /reasoning behavior, including exact max support and fail-closed rejection of exact ultra.
• Added exact-lane prompt manifests, immutable heterogeneous child execution policies, exact-owner result mailboxes, lease-safe coordinator resume, and master-only user-facing completion ownership.
• Added bounded source-authoritative receipt histories, derived indexes, and an isolated ledger maintenance loop for runtime, progress, virtual-session, and delivery evidence.
• Hardened deterministic cron retries, timezone-aware scheduling, process-tree timeout cleanup, terminal receipt trust, and supervisor preservation of configured secondary Telegram loops.

Verification

• cargo fmt --all -- --check
• Full workspace all-target suite: 1,170 tests passed.
• Exact-current-session coordinator replay and controlled live cutover checks passed the master-owned continuation/final and child-suppression invariants.
• git diff --check and tracked-file agent-harness public-hygiene passed with no forbidden hits.

Compatibility

This is a pre-1.0 Rust source boundary. The v0.8 reader retains documented legacy artifact readers, but older binaries must not be assumed to read V2 state written by v0.8. See the 0.7 to 0.8 migration guide.

See the changelog for the complete release summary.