* fix(server): persist ModelListStore across replicas via Redis
The model picker uses a pending-request pattern: the frontend POSTs to
create a request, the daemon pops it on its next heartbeat, runs
agent.ListModels locally, and reports back. Until now the store was a
plain in-memory map per Handler instance.
That works for self-hosted single-instance deploys but fails in any
multi-replica environment (Multica Cloud). Each replica has its own
map, so:
POST /runtimes/:id/models → request stored in replica A
GET /runtimes/:id/models/<requestId> → polls land on B/C → 404
daemon heartbeat → only A sees PendingModelList
POST .../<requestId>/result → daemon's report has to land on A
Success probability ~1/N². The visible symptom is "No models available"
in the picker for every provider, even those (Claude/Codex) whose
catalog is statically populated end-to-end.
Same shape of bug, same Redis-backed fix as multica-ai/multica#1557 did
for LocalSkillListStore / LocalSkillImportStore. Reuse the operational
playbook (namespaced keys, ZSET-backed pending queue, atomic
ZREM+SET-running via the shared Lua script) so we don't introduce a
second concurrency model for the same primitive.
Changes:
- Convert ModelListStore from struct to interface with context-aware
methods. Add HasPending for cheap heartbeat-side probing.
- InMemoryModelListStore — single-node fallback, used when REDIS_URL
is unset (self-hosted dev / tests).
- RedisModelListStore — multi-node implementation using the same key
layout and Lua atomic claim as RedisLocalSkillListStore.
- Use RunStartedAt (not UpdatedAt) as the running-timeout reference
point, matching the local-skill stores so subsequent UpdatedAt
bumps don't reset the running clock.
- Heartbeat now uses the probe-then-pop pattern for the model queue
(matching local-skills) so a slow Redis can't stall every connected
daemon. Extends heartbeatMetrics + slow-log with probe_model_ms /
pop_model_ms / probe_model_timed_out for parity.
- Wire the Redis backend in NewRouterWithOptions when rdb != nil.
- Tests for both backends. Redis tests gate on REDIS_TEST_URL so
laptop runs without Redis still pass; CI provides it.
Co-authored-by: multica-agent <github@multica.ai>
* fix(server): persist RunStartedAt + retry model report on transient failures
Two follow-ups from PR #2022 review:
1. RedisModelListStore was dropping ModelListRequest.RunStartedAt on
persistence — the field is tagged json:"-" so it doesn't leak into
the HTTP response, which made plain json.Marshal(req) silently
discard it. Across-node readers saw RunStartedAt=nil and
applyModelListTimeout's running branch became a no-op, so the 60s
running-timeout escape hatch never fired. CI's
TestRedisModelListStore_RunningTimeout was failing on this exact
case. Fix mirrors RedisLocalSkillImportStore's envelope pattern —
wrap in an internal struct that re-promotes the field. HTTP shape
stays clean. Adds a no-Redis unit test that pins the round trip.
2. Daemon's handleModelList called d.client.ReportModelListResult
directly and swallowed any 5xx, leaving the pending request
stranded in "running" until its 60s server-side timeout — exactly
the failure mode the multi-node store fix was meant to eliminate.
Generalize the existing local-skill retry helper into
reportRuntimeResultWithRetry (kind: model_list / local_skill_list /
local_skill_import) and wire handleModelList through a new
reportModelListResult helper. Renames the test-overridable
var localSkillReportBackoffs → runtimeReportBackoffs to match.
Co-authored-by: multica-agent <github@multica.ai>
---------
Co-authored-by: multica-agent <github@multica.ai>
