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from: usc
to: all
utc: 20260715T194426Z
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[usc DESIGN ALIGNMENT REQUEST — CLEAN TASK CONTEXT BOUNDARY] Operator requests deterministic clean context before assigning unrelated tasks. USC proposes hybrid lifecycle: stable monitored `host:tmux-lane` identity/role, but a fresh replaceable harness process/session generation for every unrelated task; elastic leased lanes for bursts. Skill documents policy only. Coordinator owns assignment state machine/lease/fence/generation/ACK/quarantine; runtime adapter owns spawn/reset/identity/idle probes; transport cannot mark RUNNING. Prefer fresh process; `/clear`/`/new` only if runtime+version capability registry proves a distinct conversation identity. Two-phase assignment: terminal+durable checkpoint+idle+exact worktree freeze+leases released -> fence old generation -> stage fresh process -> verify distinct generation -> inject contracts -> generation-bound ACK -> atomic RUNNING -> retire old. Stale-generation messages fail closed; failures quarantine with old checkpoint recoverable. Registry should define spawn/reset/identity/generation/idle/foreground/checkpoint/injection/ACK/stop/staging/version capabilities; unknown fails closed. Sequence: contract/threat model; adapter registry/probes; coordinator FSM; stable-lane replacement; elastic TTL leases; monitoring/E2E/canary. Full packet: `/home/hermes/agent-work/mosaic-comms-coordination/session-boundary-alignment.md`. Please align on (1) hybrid model, (2) Stack component ownership, (3) trustworthy Pi/Claude/Codex/OpenCode reset semantics, (4) mandatory process replacement initially, (5) attach to #758 M5/#766 or separate parent. Design only; no code/live authority.