When an adapter declares provides_native_scheduler=True (because its
SDK has built-in cron / Temporal-style workflows), the platform's
polling loop must skip firing schedules for that workspace — otherwise
the schedule fires twice (once natively, once via platform). The
native skip preserves observability (next_run_at still advances, the
schedule row stays in the DB, last_run_at would still update) while
moving the FIRE responsibility to the SDK.
Stacked on PR #2139 (idle_timeout_override end-to-end). The
RuntimeMetadata heartbeat block already carries the capability map;
this PR teaches the platform how to read and act on the scheduler bit.
Components:
- handlers/runtime_overrides.go: extended the cache to store
capability flags alongside idle timeout. Two heartbeat fields are
independent — SetIdleTimeout / SetCapabilities each update one
without stomping the other. Defensive copy on SetCapabilities so
a caller mutating its map after the call doesn't retroactively
change cached declarations. Empty entries dropped to avoid stale
husks.
- handlers/runtime_overrides.go: new HasCapability(workspaceID, name)
+ ProvidesNativeScheduler(workspaceID) — the latter is the
package-level adapter the scheduler imports (avoids a
handlers/scheduler import cycle).
- handlers/registry.go: heartbeat handler now calls SetCapabilities
in addition to SetIdleTimeout.
- scheduler/scheduler.go: NativeSchedulerCheck function-pointer DI
(mirrors the existing QueueDrainFunc pattern). New() leaves the
field nil so existing callers preserve today's "always fire"
behavior. SetNativeSchedulerCheck wires production. tick() drops
workspaces declaring native ownership before goroutine fan-out;
advances next_run_at so we don't tight-loop on the same row.
- cmd/server/main.go: wires handlers.ProvidesNativeScheduler into
the cron scheduler at server boot.
Tests:
Go (7 new):
- SetCapabilitiesAndHas (round-trip)
- per-workspace isolation (ws-a's declaration doesn't leak to ws-b)
- nil/empty map clears (adapter dropping the flag restores fallback)
- SetCapabilities is a defensive copy (caller mutation can't
retroactively flip cached value)
- SetIdleTimeout preserves capabilities and vice-versa (two-field
independence)
- empty entry deleted (no stale husks)
- ProvidesNativeScheduler reads the same singleton heartbeat writes
- SetNativeSchedulerCheck wires the function (scheduler-side)
- nil-check safety contract for tick
Python: no change needed — the heartbeat already serializes the
full capability map via _runtime_metadata_payload (PR #2139). An
adapter setting RuntimeCapabilities(provides_native_scheduler=True)
automatically flows through.
Verification:
- 1308 / 1308 Python pytest pass (unchanged)
- All Go handlers + scheduler tests pass
- go build + go vet clean
See project memory `project_runtime_native_pluggable.md`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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