Files
multica/server/internal
Jiang Bohan 3466bbc196 fix(skills): atomic Redis claim + surface store write failures (PR #1557 review)
Two real gaps GPT-Boy flagged:

1. RedisLocalSkill{List,Import}Store.PopPending was doing ZREM then SET as
   two separate round-trips. If the SET failed for any reason — transient
   Redis error, context cancellation, pod getting SIGKILL'd mid-call — the
   request was already gone from the pending zset but the stored record
   still said "pending", and no subsequent PopPending would re-dispatch
   it. Exactly the "request disappears" class of bug this PR is supposed
   to kill.

   Fix: push the claim into a Lua script so Redis runs ZREM + SET as one
   atomic unit. If ZREM returns 0 (another node won the race), SET is
   skipped and the caller retries.

2. ReportLocalSkill{List,Import}Result handlers were logging Complete/Fail
   store failures at Warn and still returning 200 OK. That made the
   daemon think the report landed when it hadn't, leaving the request
   stuck in "running" until the server-side timeout and — worse for the
   import flow — leaving the just-created Skill row orphaned in Postgres
   so every retry collided with the unique-name constraint.

   Fix: escalate to Error + return 500 so the daemon (and monitoring) can
   see the write failed. For the import flow, Complete failure after the
   Skill row is already committed also triggers a best-effort DeleteSkill
   so a daemon retry lands on a clean slate instead of hitting
   "a skill with this name already exists" forever.

Tests
- New TestRedisLocalSkillListStore_PopPendingAtomicClaim asserts the
  happy-path invariant: after one PopPending the record is "running"
  AND a second PopPending returns nothing. Deliberately does NOT poke
  Redis internals directly so the test survives any future key-layout
  refactor.
- Existing cross-instance / concurrent / timeout / per-runtime tests
  continue to pass against the Lua-based claim path (verified locally
  against a scratch redis-server; 8/8 Redis tests green).
2026-04-23 16:57:55 +08:00
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