Add a safe, reversible path to validate the fleet coordinator against the proven
single-host path BEFORE cutover, via three independently-toggleable flags:
AQ_FLEET=0 pure offline (zero coordinator calls; offline path unchanged)
AQ_FLEET_ROUTE=1 route_via_service: coordinator authoritative for claim (default = P2-S3)
AQ_FLEET_ROUTE=0 local inbox authoritative (coordinator not used to source work)
AQ_FLEET_SHADOW=1 dual-run (needs AQ_FLEET=1 + ROUTE=0): query coordinator in parallel,
record divergence, NEVER act on it
Precedence: SHADOW only when ROUTE=0; if ROUTE=1 + SHADOW=1, ROUTE wins (one-shot warning).
lib/fleet-client.sh: fleet_route_enabled / fleet_shadow_enabled / fleet_flags_warn_once /
fleet_flags_state; fleet_shadow_claim (read-only — isolated `-shadow` factoryId +
dryRun, releases any real lease, never materializes), fleet_shadow_compare
(AGREE/DIVERGE/COORD_EMPTY/LOCAL_EMPTY → .state/fleet-shadow.log), fleet_shadow_report
(shadow:true, response never acted on), cmd_fleet_shadow_report (counts + agreement rate).
agent-queue.sh: ROUTE-gate claim sourcing (claim only when route_via_service);
shadow hook after the local authoritative decision each iteration (best-effort,
error-swallowed — shadow can never fail a real job); `fleet-shadow-report` subcommand
+ help; resolved flags surfaced in `status`/`fleet-status`. tryClaim/fence/offline
paths unchanged.
Strictly side-effect-free on real job state: shadow never ships, quarantines, or
mutates real jobs. Offline path byte-for-byte unchanged when AQ_FLEET=0.
selftest.sh: +8 checks (shadow AGREE/DIVERGE/COORD_EMPTY, non-fatal 5xx, ROUTE
precedence, ROUTE=0 local-authoritative, fleet-shadow-report summary, shadow_report
unit). 60 prior checks unchanged → 68 total green. README + GIGAFACTORY_ROADMAP
document the flag model + cutover ladder.
Generated with [Devin](https://cli.devin.ai/docs)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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