feat(supervision): add choice watcher daemon, HTTPS spec docs, and test suites

- bin/muse_choice_watcher.py + systemd/muse-choices-reconcile.*: automatic choice answering and timer reconciliation
- bin/digest.py: fleet log and health summarization
- docs/BOX-*-HTTPS.md: comprehensive HTTPS execution contracts and API documentation
- docs/MUSE-CHOICES-POLICY.md & docs/SUPERVISION-SPEC.md: autonomous execution specs
- tests/test_*.py: unit test suites for HTTPS API, choice watcher, fleet heal, and swarm pruning

docs/SUPERVISION-SPEC.md

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+# Supervision Scope Contract
+
+Status: **Draft** — decisions below are unsettled until marked otherwise.
+Only explicit user acceptance moves this document (or any decision) to Final.
+
+## Goal
+
+Every fleet node stays alive and truthfully reported: browsers supervised,
+relays supervised, dead nodes recovered or loudly paged, and `box` status
+honest from any shell (including PID/net-blind sandboxed shells).
+
+## Non-goals (proposed)
+
+- Agent lifecycle/onboarding stages (provision, auth, OTP, invite redeem).
+- Work completion (job dispatch, followups, harvester, completion auditor).
+- Loop-health scoring and drive repair.
+
+## Supervisors (observed, all installed 2026-10-06)
+
+| Supervisor | Cadence | Coverage | Decides |
+|---|---|---|---|
+| chromebox-watchdog@\<node\>.timer ×6 | 2 min | all registry nodes (def/dev timers installed 18:32Z) | browser+egress per node; tunnel restart, chrome relaunch |
+| cdp-relay-watchdog.timer | 5 min | registry-driven (`watched_nodes()`) | relay veth IP + connectivity; relay restart |
+| agent-health.timer (user) | 5 min | registry-driven | API check per node; kill+restart with 2-strike rule + circuit breaker (3 futile → open 30 min) |
+| ensure-node-supervision.sh | on node-up / `--all` | new + drifted nodes | NODES.md row + chromebox timer install |
+| host_evidence fallback | on `box` read | registry (relay) + installed timers (browser) | effective status when live probes are blind |
+
+## Decisions
+
+(D1..D7 below — all UNRESOLVED unless marked.)
+
+### D1. Contract boundary: which supervisors are in scope — SETTLED (recommended accepted)
+
+IN: chromebox-watchdog ×6, cdp-relay-watchdog, agent-health + circuit
+breaker, ensure-node-supervision feed, host_evidence fallback.
+OUT: onboarding pipeline lifecycle, completion auditor, loop-health
+(each keeps its own owner and interviews separately).
+
+### D2. Kill-path precedence (chromebox-watchdog vs agent-health) — UNRESOLVED
+
+Both can kill a browser today; only time guards (<2 min) de-conflict them.
+
+### D3. Egress-down fall-through (relaunch chrome after failed tunnel restart?) — UNRESOLVED
+
+Observed 19:12Z: tunnel restart failed, watchdog relaunched chrome 3×
+anyway (one FAILED page). Browser was never the problem.
+
+### D4. Circuit-breaker thresholds (3 futile / 30 min cooldown) — UNRESOLVED
+
+Current values unvalidated against real recurrence intervals.
+
+### D5. Coverage source of truth — UNRESOLVED
+
+Registry-only vs registry+installed-timers for browser verdicts.
+
+### D6. Concurrent-edit protocol for shared supervision files — UNRESOLVED
+
+Two agents editing super-cli.py / watchdogs / runbook; one clobber
+(18:03Z) and one unattributed commit (c9143a5) already occurred.
+
+### D7. Done means — UNRESOLVED
+
+Proposed checklist: timers on all 6 firing silent; relay/agent-health
+loops registry-driven with tests; ensure hook live; this doc Final.
+
+## Risks
+
+- Egress-down pages read as browser failures (D3).
+- Uncommitted supervisor work can be clobbered by a concurrent editor (D6).
+- c9143a5 contains unattributed peer hunks (host_evidence `_covered_nodes`,
+  fleet-status test updates) — needs an amend-or-leave decision.
+
+## Validation
+
+- `box fleet status` truthful from blind shells (live-verified 6/6 ACTIVE).
+- Focused suites green (supervision, fleet, agent-health, watchdog coverage).
+- Timer firing proven via journal, not config presence.
+
+## Unresolved items
+
+D2–D7 unresolved. D1 settled.