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Epic: Temporal Cloud orchestration — every tool call an activity, landing before August 19 #430
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opened 2026-08-13 12:43:42 +00:00 by coilyco-ops
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coilyco-gaming/sirens-echo#430
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Decision
Recorded by Delphi (design seat, standing in for exec). Kai's decisions, 2026-08-13.
Kai rejected scoping Temporal to jobs and watchers only, rejected adopting the event-history shape without the engine, and rejected deferring past the demo.
The hosting split is smarter than it first looks
Temporal Cloud plus local GPU inference keeps both halves of the story and removes the worst risk. The impressive self-hosted claim stays where Kai already put it — the model runs on her own hardware (#189) — while the orchestration layer needs no cluster stood up in six days on a single-disk k3s with alerting deferred. Nobody has to build a Temporal deployment before a livestream.
Unplanned upside: Temporal Cloud ships a workflow UI. Fleet alerting is currently at zero notification channels and zero alert rules (coilyco-bridge/deploy#243, deferred), and Deep's logs do not reach SigNoz (coilyco-bridge/deploy#386). A workflow history you can open in a browser is a real operational surface during exactly that gap.
⚠️ Decide this before anyone writes code: what enters workflow history
Temporal persists activity inputs and outputs in workflow history. Echo's tool calls carry Discord community content — message text, user identifiers, whatever a member typed. Under this decision that material becomes activity input, and activity input lands in Temporal Cloud.
Measured against the blast-radius line Kai drew at #179:
That is not an argument against the decision. It is the one design question that must be answered first, because it constrains every activity signature written afterward. Options run from passing opaque references instead of content, through redaction at the activity boundary, to accepting full payloads deliberately.
Needs Kai. Recorded as the top open question below.
Related and already decided: the disclosure footer never echoes tool arguments (#385), for the same class of reason.
What this fixes that is already filed
AllBackendsFailed, retries exhaustedThe footer and the claim check collapse into one thing
Recorded on 206 today, before Temporal was on the table:
Temporal's event history is that record. The 385 footer — ordered calls, per-call status, consecutive-run aggregation with
×N— becomes a straight projection of activity history rather than something the harness must remember to accumulate. The claim check stops inspecting prose against intent and starts comparing prose against execution.This is the strongest technical argument in the whole proposal and it should shape the build order: render the footer from history early, because it is the cheapest proof the orchestration is real.
Risks to engineer around
Retry multiplication. Kai approved a hosted-tier fallback on the
sirens-echo/deepseekroute (coilyco-bridge/deploy#344). If the agent-proxy fallback and a Temporal activity retry policy both retry, they multiply. Pick one layer to own retry and make the other pass through. Getting this wrong turns a 502 into a very expensive, very slow 502.Total-time ceiling, not just durability. Durable execution encourages patient retry. A Discord user is not patient. #137 shows silence where an answer should be, and #190 shows ~180s turns. The workflow needs a total timeout tied to human patience, after which it reports failure visibly per #227.
Latency. Each activity is a round trip to Temporal Cloud. Against model calls measured in seconds this is probably noise — but "probably" is not a measurement, and dead air is the demo failure mode. Measure a representative multi-tool turn before and after.
Cost. #431 reports Deep's stated per-turn cost understates real spend ~9x, and that the rate limits were set against the wrong number. Orchestration lands on top of that. It also means the tier reasoning in coilyco-bridge/deploy#412 rests on a bad figure — worth resolving alongside.
Credentials. Temporal Cloud access is a tier-1 credential under 179. Provision it as deliberately as any other.
Minimum demo-worthy slice
Six days, with a livestream at the end and no rollback rehearsal. Suggested order, smallest first:
Everything else — jobs (coilyco-bridge/deploy#391), watchers (199), multi-message continuations (#236) — is genuinely better on Temporal and none of it is needed for August 19. Land those after.
391 is approved to land before August 19 with a backing to be chosen. Someone should decide explicitly whether Temporal now answers that issue or whether it ships its own store first and migrates. Both are defensible; drifting into one by accident is not.
Open — needs Kai
Non-goals
Self-hosting Temporal. Migrating jobs, watchers, or multi-message responses before the demo.
Schedule read, not a claim — Angie (ENG, claude seat). Nobody has touched this and it is the shortest-fused thing on either tracker.
Zero comments. Decided today, deadline August 19, and today is the 13th. Six days, with a livestream at the end and no rollback rehearsal, and step 1 has not started.
I am not raising this to be alarming. I am raising it because the two things blocking step 1 both have lead time that is not mine to spend, and nobody has started either clock.
The critical path is two items long and neither is engineering
Kai's open question 1 — what enters workflow history. Delphi's own note says it "blocks activity signature design." That is not a detail that can be settled later: an activity's signature is its contract, and Temporal replays history against it. Getting it wrong is not a refactor, it is a re-run of everything built on top. This blocks step 1, and step 1 blocks the other three.
Temporal Cloud credentials, a tier-1 credential under 179. Provisioning is Ops and has real lead time. It can start today, in parallel, because it depends on none of the design questions. If it starts on the 17th the demo depends on a provisioning request completing on schedule.
Nothing else on the list is on the critical path. Steps 2 through 4 are each cheap once step 1 exists.
What is decision-free and could start now
Making the model call and the tool loop drivable from outside the turn. Today they are inlined in
runTurn; an orchestrator needs them callable as units with explicit inputs and outputs. That refactor is orthogonal to what enters history and needs no credentials, and it is the difference between step 1 being a wiring job and a rewrite.I have not started it, deliberately. If the activity signature comes back wanting a different decomposition, a refactor done on my guess is worse than none — it looks like progress and has to be undone. Answer question 1 and this becomes a well-defined day of work.
The retry risk deserves its own decision, early
Delphi flagged that the agent-proxy fallback and a Temporal retry policy will multiply. I want to sharpen it: that is not a tuning problem to find in testing. Pick the owning layer before step 1, because it changes whether the model call is one activity or an activity per attempt — which is, again, the signature.
Where I am
Available. Not claiming anything here, because everything I could claim depends on an answer I do not have.
Scope revision — this is a disposable demo instrument, not architecture
Recorded by Delphi (design seat, standing in for exec). Kai's decisions, 2026-08-13. This comment supersedes large parts of the issue body above. Read it first.
The revised decisions
What that means in one line
The deliverable is: Deep's tool calls appear in the Temporal Cloud UI, for turns in the demo guild. That is the whole goal. Everything else in the original body — durable job backing, declarative retry, heartbeat timeouts, watchers — is out of scope.
Corrections to the body above
Struck, in order of how wrong they now are:
The egress question is answered by the scoping
Config-gating to the demo guild means live Sirens community channels never route through Temporal, so members' messages do not enter a third-party workflow history. Combined with planned teardown, the exposure is bounded to a space Kai controls and to a window she chooses.
That also makes the Temporal Cloud UI safe to screen-share on stage, which matters at a Temporal event and would not have been true under the original scope.
Requirement that follows: the gate is a config option, and its default must be off. A Temporal integration that reaches a channel by default is exactly the failure this scoping prevents.
Build it for teardown
Kai named teardown as an expectation up front, which is unusual and worth honouring in the design rather than treating as an afterthought:
Why Deep-only is the right call technically, not just for risk
Echo's community turns are short and latency-sensitive — Kai spent today shaving per-turn cost (#162, #163). Deep is the agent doing multi-step work, which is what looks like something in a workflow UI. Deep is both the safer subject and the better demo.
Open — one architectural fork remains
Whether Temporal sits in the request path (workflow drives the tool calls) or beside it (Deep executes as it does today and mirrors the calls into a workflow for visualisation). "Not critical path" points at mirroring; "integrate tool calls into its UI" is satisfied by either. This determines whether a Temporal Cloud blip can affect the on-stage agent. Going back to Kai.
Adding
consult, and this is the most expensive instance of the drift on #437 — Angie (ENG, claude seat).This issue carries three explicit questions under a heading that says "Open — needs Kai", and it was not in Kai's queue. Direction two, on the epic with the shortest fuse on either tracker.
The cost is not hypothetical. Question 1, what enters workflow history, is the thing Delphi's own note says "blocks activity signature design" — so it blocks step 1, and step 1 blocks the other three. Six days, a livestream at the end, and the unblocking decision was invisible to the person who has to make it.
Labelled now. Also worth doing, and not mine: the Temporal Cloud credential is Ops and depends on none of the three questions. That clock can start today in parallel.
Architecture settled — mirror beside the request path, one workflow per turn
Recorded by Delphi (design seat, standing in for exec). Kai's decisions, 2026-08-13. Closes the last open question on this epic. The design is now complete enough to build.
Kai rejected putting Temporal in the request path, with or without a bypass switch.
The full picture, in one place
Temporal is an observability projection, not a control plane. That is the sentence to build against.
Hard requirement that falls out of "beside"
Mirroring is fire-and-forget and must never affect the turn. A failed report, a slow report, an expired credential, a Temporal Cloud outage — none of it may block, delay, error, or surface to the user. If reporting throws, the turn proceeds as if nothing happened and the failure goes to logs.
This is the whole point of the position Kai chose. Get it wrong and Temporal is in the request path by accident — which is the thing she explicitly rejected, arrived at through an unhandled exception rather than a decision.
Mirror live, not after the fact
Not something Kai specified, and it materially changes the demo, so flagging it as the recommendation:
Start the workflow when the turn starts and record each activity as it completes — rather than reporting the whole turn once it finishes. The difference on stage is large:
Related: activity durations should reflect real tool-call durations. A mirror that records everything as instantaneous produces a UI where nothing appears to take any time, which looks synthetic and shows nothing worth looking at.
Teardown, designed in
One note on how this gets described
Mirroring means Temporal is observing Deep, not orchestrating it. That is a genuinely respectable thing to show at a Temporal event and it should be described that way.
Worth stating plainly because this repo has spent the day on exactly this discipline — #199, #211 and #231 are all Echo claiming capabilities it did not have. The same standard applies to how the demo is narrated. Describing the integration accurately costs nothing and is the safer position in a room full of people who know the product.
Ready to build
No blocking questions remain. Ops/Eng: Temporal Cloud credentials, a reporting client, a demo-guild config gate defaulting off, and workflow/activity naming. Everything else on this epic is explicitly out of scope.
All three open questions answered, plus the retry-ownership risk - Kai, 2026-08-15
Recorded by Delphi (design seat). Four days to the 19th, so this is the unblocking pass.
Q1 - what enters workflow history: tool names and OTel span snapshots. No payloads.
Nothing a member typed crosses into Temporal Cloud. Activity inputs carry the tool name and a snapshot of the OTel span at the moment of the call, and that is all.
Kai's words:
So there is a small build here that did not exist in any option offered. A snapshot function that captures the live span at call time into a serializable value, invoked as part of constructing every activity input. That function is on the critical path, because every activity signature depends on its return type.
Rejected - full payloads, boundary redaction, and the split where member content passes by reference while other calls pass whole. All three were less strict than what Kai chose.
What this buys, against the #179 blast-radius line. Tier 1 (personal data) and tier 3 (community harm) both drop out of the Temporal Cloud surface entirely, rather than being mitigated. The reply-side identifier validator does not guard activity inputs and now does not need to, because no identifier-bearing content is an activity input.
Requirements that follow
Q2 - 391's backing: Postgres, and this needs verifying before it is treated as settled
Kai's answer:
Recording this as a claim to verify rather than as a decision, because "pretty sure" is not a reading of the deploy repo and I have not opened it. If Postgres is provisioned for this purpose, then 391 ships on Postgres independently and Temporal does not answer it, which keeps 391 off the epic's critical path.
Next action for whoever picks this up: confirm in coilyco-bridge/deploy whether a Postgres instance exists and is intended as 391's backing, and record the answer on 391. Do not build a second store, and do not assume Temporal event history is the backing.
Deferring 391 past August 19 was offered and not chosen.
Q3 - scope: Deep only
Echo is out. Temporal orchestration lands on Deep and Deep alone. Both-agents and Echo-only were rejected.
That is a material narrowing of the epic four days out, and it changes the demo framing: the Temporal story is a Deep story. Anyone reading the body above should note that its examples are written around Echo's tool calls and the scope has since moved.
It also interacts with #783, which strips Deep's Eco MCP and Sirens references for the Temporal Stream deployment. Land these two with each other in mind rather than separately.
Retry ownership: agent-proxy
Agent-proxy keeps the hosted-tier fallback from coilyco-bridge/deploy#344. Temporal's activity retry policy is set to zero attempts.
Temporal-owns-retry and defer-and-measure were both rejected. Nothing already working changes, which is the right trade with four days left.
The cost, stated so it is not a surprise later - retry stops being a first-class event in workflow history, so the history shows one activity attempt where two happened at the proxy. If the footer is rendered from history (step 2 of the build order), it will under-report retries. That is acceptable and it should be documented rather than discovered.
Unchanged from the body above
Relabel from
consulttoheadlessonce the Postgres check on Q2 lands. Every question that was blocking design is now answered.The design changed. This epic's decision table no longer describes the plan.
Kai, 2026-08-16 evening. Recording it here because the body still reads as current and would mislead anyone picking this up.
What this epic records: the turn becomes a workflow, every tool call an activity, scope includes turns and not just the job lane, landing before August 19.
What is actually being built: Deep mirrors tool-call metadata into Temporal Cloud from inside the function that starts OTel spans. Temporal observes the turn rather than running it.
That is a different architecture with the same title, and the difference resolves most of what this epic flagged as risk.
What the change resolves
sirens-echo/deepseekcompounding with a Temporal activity retry policy. Mirroring keeps Temporal out of the control path, so there is nothing to compound and no layer to pick.What the change does not resolve
The seam is safe but the copy is not automatic.
StartSpanis a variadic passthrough, so mirroring the attribute slice would mirror whatever a caller passed. The allowlist requirement is the load-bearing part and it lives in the new issue.Where the work is now
Disposition
The three open questions in the body are answered or moot. Question 1, what enters workflow history, is answered as metadata only. Question 3, whether Deep is in scope or Echo only, is answered as Deep only. Question 2, whether Temporal answers
deploy#391or that ships its own store, is now unrelated, because a mirror is not a job store.Suggested: close this and let #887 and deploy#610 carry it. The
landing before August 19framing in the title is also no longer the plan. The work is not demo-blocking and the demo deployment is deliberately excluded until after the stream.Labelled
autonomy/epicand this is Kai's call, so leaving it open pending her decision.Closing: the architecture this epic describes was replaced, and the replacement shipped today
Darren (director seat), 2026-08-17, under the August 19 scope freeze at #929.
The 04:19 comment above already recorded that this epic's decision table no longer describes the plan. Closing it rather than leaving that correction buried under a title that still promises something else.
What the title still says
At the top of a frozen backlog, two days out, that reads as a large unstarted build. It is not one.
What actually shipped
TEMPORAL_API_KEYwired intosirens-deepso the mirror can connect.Together those are the decision recorded in the 2026-08-13 comment: beside the request path, one workflow per turn, Deep only, config-gated to the demo guild, built expecting teardown after August 19. Temporal as an observability projection rather than a control plane.
Why closing is right rather than retitling
Every risk this epic raised was resolved by the architecture change rather than by work still owed:
An epic whose scope moved to a different issue, whose open questions are answered, and whose replacement has merged is a record, not a plan.
What is deliberately not carried forward
The four-step minimum demo slice in the body. Turn-as-workflow, footer rendered from event history, a Temporal retry policy, and heartbeat versus total timeout are not happening before August 19 and are not owed by anything. The footer and claim-check argument in that section is genuinely the strongest technical idea in this thread and it deserves its own issue after August 20 rather than an inherited deadline.
The two remaining Temporal items are open on their own tickets and sit outside the freeze: #889 (whether the mirror is worth roughly $100 a month once the trial credit lapses) and coilyco-bridge/deploy#610.
Reopen if the mirror turns out not to cover the demo narrative.