Split an indexer across processes when the connection budget affords it by DZakh · Pull Request #1646 · enviodev/hyperindex

DZakh · 2026-09-16T09:46:38Z

Summary

An isolated schema could already be driven by several processes, but only by hand: one envio start --chain per chain, each with its own port, its own logs and its own metrics endpoint, and nothing tying them together.

A plain envio start (and envio dev) now does it. When every entity in the schema is per-chain and the connection budget affords two processes, the run forks a worker per group of chains and supervises them, so the operator still sees one indexer: one metrics endpoint over the merged snapshot, one console, one progress display, one process to stop, and one moment when the whole run goes realtime.

A schema with an entity shared across chains, or a budget under 4, runs in one process exactly as it does today, with no message.

Raising the budget is what splits a run

ENVIO_PG_MAX_CONNECTIONS is now the budget for the whole run rather than the cap on one process's pool. Its default stays 2, which buys a single worker, so nothing about an existing deployment changes until the operator raises it.

A budget buys one process per two connections: ENVIO_PG_MAX_CONNECTIONS=10 over a per-chain schema of five chains gives five workers with two connections each; over two chains it gives two workers with five each. What a raised budget means for a run that can't split — a schema with an entity shared across chains, or a single chain — is what it always meant: the one process opens a pool that size.

How it works

The decision is Main.start's: it supervises a group when the budget and the schema afford splitting the chains, and runs the indexer itself otherwise. A worker is already one process's part of a run, so it never splits again.

The supervisor creates the schema for every chain — the same initialization an unsplit run does, naming the operator's own commands in anything a config change prints — and closes its connection before forking, so the budget belongs entirely to the workers. It forks the same entry it was started from, so a worker is the same program as its supervisor however the package was installed. Its own life is the group's: once the group is gone it exits, rather than sitting on a server and signal handlers that outlive the work.

A worker is the process its supervisor forked — told by the fork's own channel together with an internal environment variable, so neither alone starts anything. Everything the supervisor decided about it rides in that variable, beside the budget share and log file it already carried: the worker parses the same config its supervisor did and narrows it to the chains it was handed, rather than being told what to index. The storage it resumes already refuses a config that disagrees with the one the run was created from, which is a stronger guarantee than a handover message could give.

It has no server and no display of its own; it reports a snapshot twice a second, over structured-clone serialization, which a snapshot's timestamps need, and the supervisor merges them. Only the supervisor stops a worker: a terminal's interrupt reaches the whole group, and a worker that ignored it can't read as a failure to a supervisor still deciding what the interrupt meant. A worker whose channel closes exits, so a supervisor that dies can't leave chains running unwatched, and one worker ending in a way the supervisor didn't ask for takes the group down rather than leaving the run half indexed.

Going realtime is the run's decision, not a process's. An indexer enters the reorg threshold and stamps every chain ready_at as a whole — chains that catch up early wait for the ones that haven't. A process driving part of a run can't see that, so a worker holds both transitions until the supervisor, who merges every snapshot, says every chain has reached the head; then all of them are released together. A chain with no reorg threshold is held by the same gate rather than racing ahead of the chains a threshold holds back.

The supervisor holds nobody when every chain resumed already caught up, and counts a chain that resumed realtime or reached its end block as arrived, so a barrier it raises can always be opened. A held worker also stays for the run at its end block instead of exiting with the indexes it still owes.

Chain placement deals the chains in config order, reversing direction each pass, so the worker that takes the first chain picks up the last. Placement decides only which worker a chain lands on, so a layout that balances badly costs balance and nothing else.

The dev console's cache dump is the supervisor's. A dump copies every effect cache table in the schema to a file named after the effect, so asking the workers for one had each copy its siblings' chains too, all writing the same files at once; and nothing in it is a worker's to know, since the rows it copies are the ones already committed. The supervisor opens one connection for the dump and closes it after — the run's only excess over its budget, in envio dev alone — and requests that overlap join the dump in flight.

/metrics/runtime reports each worker's heap and event loop under a worker label naming the chains it drives. The supervisor's own readings are left out: the memory and the event loop the indexing runs on are the workers', and it no longer samples what nothing reports.

What a split run says is what one indexer says:

Logs in an isolated run name the one chain the process drives, on the lines that had no chain in hand — and name it once, because pino concatenates a child's bindings and the process's context into the line rather than merging them.
The storage a run resumes is announced by the supervisor, for every chain; a worker resuming the state it was handed says so only to its own log file.
A run that has yet to hear from a worker renders as one still working out its ETA, rather than as an indexer with no chains left to sync.
A supervisor that draws a display reads its workers' pipes and logs their lines as its own. Logging goes through console.log precisely so ink can keep it out of its frame, but that interception is per-process: a worker's line used to reach the terminal as a raw write the display knew nothing about, tearing the frame and redrawing it. A run that draws no display leaves the workers on the inherited stdio, as before.

Moved, not rewritten

Supervisor reached into Main for the HTTP server, the display question and the schema initialization, which is what kept the decision in Bin. Each has a home below both now, so most of the diff in Main.res is code leaving it:

From	To
`Main.startServer` + the console payload types it serves	`Server.res` (new)
`Main.shouldUseTui`	`Tui.shouldUse`
`Main.initForRun`	`Persistence.initForRun`, with `Config.envioInfo`
`Supervisor.configForWorker`	`Config.withIsolatedChains`

Verification

Full envio-tests green on the branch with main merged in, lint clean, and the CLI help-consistency test passes.

New tests cover the metrics merge rules, the planner across budgets and layouts, the config narrowing, log file paths, worker detection from the environment (including what an unusable value reports), a dump that coalesces overlapping requests, a chain named once on a line that names it itself, a worker that stays quiet about storage the supervisor announced, a default budget that keeps a run in one process, a reader that holds a half line until the chunk that finishes it, and the release predicate across a partial view, a resumed-realtime chain and an end-block chain.

The realtime hold is driven through a real two-chain indexer: both chains reach the head and neither is stamped until the run says so, then one release stamps both at one instant; and a held worker at its end block stays for the run rather than exiting with the indexes it still owes. The process-level tests use real forked children for the environment a worker is started from, timestamp survival across the channel, output arriving whole across chunk boundaries and from both streams, clean group exit, and a failing worker taking the group down.

scenarios/split_test and its e2e suite drive a real split run: two chains over a per-chain schema, every worker on one metrics endpoint, one exit once both chains are done, and one interrupt to the supervisor ending them all.

Also exercised by hand against a local Postgres with a two-chain per-chain project:

Run	Result
Two chains	Schema created, two workers forked, both chains merged into the parent's `/metrics`, `/healthz` green
Split run logs	`chainId: 1` and `chainId: 137`, each from its own process
SIGTERM to the supervisor	Exits in ~2s, no leftover processes

Deferred

Worker restart on crash. Detaching the supervisor from its workers. A per-chain status in the progress display — a chain that is caught up and waiting for the run currently renders as one still syncing, which is the pre-existing rendering of the finalizing phase rather than something the hold introduced.

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Summary by CodeRabbit

New Features
- Indexing can automatically split eligible per-chain workloads across multiple processes.
- Worker processes coordinate cache synchronization, metrics, shutdown, and failure handling.
- Aggregated metrics provide a unified view across active processes.
- Logs can identify chains associated with isolated processes.
Improvements
- Startup help now explains automatic splitting requirements and manual assignment options.
- Terminal UI behavior is more consistent in worker, test, and non-interactive environments.
- Logging contexts are replaced cleanly when execution context changes.

An isolated schema could already be driven by several processes, but only by hand: one `envio start --chain` per chain, each with its own port, its own logs and its own metrics endpoint, and nothing tying them together. A plain `envio start` now does it. When every entity is per-chain and ENVIO_PG_MAX_CONNECTIONS affords two connections per process, the run forks a worker per group of chains and supervises them, so the operator still sees one indexer: one metrics endpoint over the merged snapshot, one console, one progress display, one process to stop. BREAKING: ENVIO_PG_MAX_CONNECTIONS is now the budget for the whole run rather than the cap on one process's pool. A run that set it to 10 for throughput used to get a single process with ten connections; it now gets five workers with two each, which also gives each its own event loop and heap. Chains are placed round-robin over config order: what would balance them is how much work each has left, and that isn't known until they report their heights. The supervisor creates the schema for every chain and closes its own connection before forking, so the budget belongs entirely to the workers. Workers talk over the fork's own channel under structured-clone serialization, which a metrics snapshot's timestamps need. A worker exits when the channel closes, so a supervisor that dies can't leave chains running unwatched, and one worker ending in a way the supervisor didn't ask for takes the group down rather than leaving the run half indexed. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

Two changes to how a split run reads and how it is laid out. A worker's logger now carries the chains it drives, so every line it writes says where it came from even where the call site had no chain in hand. That replaces the prefix the supervisor used to paste onto each line it read back: workers write straight to the run's output now, which also drops the piping and the line-reassembly it needed. One chain reports `chainId`, matching the field chain-scoped logs already use, so queries over both unify; several report `chainIds`. Chains are dealt busiest-first rather than in config order, reversing direction each pass, so the heaviest chains lead different workers and the worker that took the heaviest picks up the lightest. The ranking is an explicit list of chain ids and nothing more: it decides only which worker a chain lands on, so a chain ranked wrong, or missing from the list, costs balance and nothing else. Chains it doesn't name sort behind the ones it does, in config order. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

…an the logger The chains belong to the run, not to the logger, and they apply whenever the schema is per-chain — a single process driving every chain included, not only a process a supervisor forked. So the config says what a line is attributable to and the indexer sets it once at startup. The logger only carries what it is handed: it keeps the root it was built with, so setting context twice in one process replaces it rather than stacking. A run driving one chain reports `chainId`, matching the field chain-scoped logs already use; one driving several reports `chainIds`; a schema with an entity shared across chains reports neither, since that work is no single chain's. `Config.isPerChain` now names the condition the split already tested for, so the two read the same predicate. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

coderabbitai · 2026-09-16T09:46:51Z

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📝 Walkthrough

Walkthrough

The change adds automatic per-chain worker splitting, child-process coordination, cache synchronization, worker lifecycle handling, merged metrics, runtime metric labeling, logging context control, CLI documentation, and end-to-end split-run coverage.

Changes

Supervised worker execution

Layer / File(s)	Summary
Worker planning and run context `packages/envio/src/Supervisor.res`, `packages/envio/src/Config.res`, `packages/envio/src/Logging.res`, `packages/cli/...`, `packages/envio-tests/test/lib_tests/Supervisor_test.res`	Plans workers from schema scope and connection budgets. Narrows worker configuration, assigns chains and log paths, applies isolated-run logging context, and documents automatic split conditions.
Worker process and IPC plumbing `packages/envio/src/bindings/NodeJs.res`, `packages/envio/src/Worker.res`, `packages/envio/src/Supervisor.res`, `packages/envio-tests/test/helpers/fakeWorker.mjs`	Adds child-process bindings and worker IPC. Workers receive initialization data, buffer early parent messages, report snapshots, acknowledge cache synchronization, and handle disconnects.
Supervised run orchestration and metrics `packages/envio/src/Bin.res`, `packages/envio/src/Main.res`, `packages/envio/src/Metrics.res`, `packages/envio/src/Supervisor.res`	Routes worker and non-worker execution, coordinates shutdown and cache synchronization, merges worker metrics, samples runtime data, renders labeled runtime metrics, and controls TUI and console behavior.
Supervisor, metric, and split-run validation `packages/envio-tests/test/`, `packages/e2e-tests/src/e2e/split-run.test.ts`, `scenarios/split_test/`	Tests planning, IPC, lifecycle handling, metric aggregation, runtime rendering, and worker failures. Adds a two-chain PostgreSQL split-run scenario and end-to-end checks.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~60 minutes

Change: Feature

Merge Risk: 🟡 Moderate · up to 2bd63

Failure paths can leave the split-run indexer alive and disrupt later CI tests, so cleanup should be fixed before merge. Runtime metrics also need a final newline for strict Prometheus consumers.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 5…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the primary change: splitting an indexer across processes when the database connection budget supports it.

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Actionable comments posted: 1

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Inline comments:
In `@packages/cli/CommandLineHelp.md`:
- Line 381: Clarify the automatic chain-splitting prerequisites in
packages/cli/CommandLineHelp.md lines 381-381 and
packages/cli/src/cli_args/clap_definitions.rs lines 148-150: require connection
capacity for multiple workers (more than ENVIO_PG_MAX_CONNECTIONS=2) and a fully
per-chain schema; shared-entity schemas must retain single-process behavior.
Keep both help descriptions consistent.

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packages/cli/CommandLineHelp.md
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packages/envio-tests/test/lib_tests/Metrics_test.res
packages/envio-tests/test/lib_tests/Supervisor_test.res
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packages/envio/src/Config.res
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"affords two connections per process" reads as satisfied by the default of 2, which buys one process and no split, and the per-chain schema requirement sat in a sentence about `--chain`'s own prerequisites. Say both outright, and say what a shared-entity schema or a smaller budget does instead. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

…cope log context to isolated runs A supervisor whose workers had all exited stayed up: its server and signal handlers kept the event loop alive, so `envio start` never returned after a SIGTERM, a Ctrl-C, or every chain reaching its end block, where a single process exits. `awaitExit` now reports whether the group finished on its own or was stopped, and the run exits on either, keeping the process only for a display to hold the final state, the way a single process does. The hard-coded chain volume ranking is gone. How much work a chain has is the contracts' to decide, not the chain's, and a fixed table gave the operator no way to correct a layout it got wrong. Chains are dealt in config order, still reversing direction each pass, so ordering chains busiest-first in config.yaml is what balances the split. Log context now applies only to an isolated run. One process driving every chain has nothing to tell its lines apart from, and its chain-scoped lines already carry `chainId`; stamping `chainIds` on every line of every per-chain indexer only added bytes. The worker reads its init payload with a one-shot listener rather than a handler that stayed registered for the process's life. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

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🟡 Minor · Wait for worker cache dumps before completing /console/syncCache.

packages/envio/src/Supervisor.res:255
🗄️ Data Integrity & Integration | 🟡 Minor | ⚡ Quick win

Wait for worker cache dumps before completing /console/syncCache.

Main.startServer returns success only after onSyncCache() resolves. The single-process implementation resolves after dumpEffectCache() completes, including its Promise.all of cache writes. In supervised mode, Supervisor.onSyncCache resolves immediately after sending Worker.SyncCache, while each worker ignores its dumpEffectCache() promise. The endpoint can therefore report success before the worker dump operations complete. Have each worker acknowledge after its dump completes, and resolve the supervisor callback only after all running workers acknowledge.
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In `@packages/envio/src/Supervisor.res` at line 255, Update Supervisor.onSyncCache
and the worker handling of Worker.SyncCache so each worker acknowledges only
after dumpEffectCache() completes, and the supervisor resolves its callback only
after all running workers have acknowledged. Preserve the existing behavior for
cache dump failures and ensure /console/syncCache does not report success before
every worker’s dump finishes.

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Outside diff comments:
In `@packages/envio/src/Supervisor.res`:
- Line 255: Update Supervisor.onSyncCache and the worker handling of
Worker.SyncCache so each worker acknowledges only after dumpEffectCache()
completes, and the supervisor resolves its callback only after all running
workers have acknowledged. Preserve the existing behavior for cache dump
failures and ensure /console/syncCache does not report success before every
worker’s dump finishes.

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packages/envio-tests/test/SupervisorFork_test.res
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packages/envio/src/Worker.res
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The console's /console/syncCache resolved as soon as the supervisor had sent the request, so a split run reported a dump that was still being written. Workers now acknowledge the dump, and the supervisor waits for every one of them. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

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⚠️ Outside the diff (1)

🟠 Major · Register child lifecycle handlers before forking workers.

packages/envio/src/Supervisor.res:199-211
🩺 Stability & Availability | 🟠 Major | ⚡ Quick win

Register child lifecycle handlers before forking workers.

Supervisor.fork creates each child and registers only its message handler. awaitExit registers onExit and onChildError only after group construction, server setup, TUI setup, and signal setup. Node emits these events once and does not replay them. No other code checks the child exit state. alive can therefore remain nonzero while the server keeps the supervisor alive.

Starting and retaining awaitExit immediately after group construction removes the later setup window, but not the interval while Array.mapWithIndex is still forking workers. Begin lifecycle tracking as each child is created, or before the first child is forked, then await the retained promise after setup.
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In `@packages/envio/src/Supervisor.res` around lines 199 - 211, Update
Supervisor.fork and the awaitExit lifecycle flow so each child has its onExit
and onChildError handlers registered before or immediately as it is forked,
rather than only after group and server setup completes. Retain the resulting
await promises and await them after setup, ensuring no child lifecycle event can
be missed while Array.mapWithIndex is still creating workers.

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Inline comments:
In `@packages/envio/src/Main.res`:
- Around line 749-752: Ensure SyncCache requests cannot be lost before the
worker’s cache-sync handler is installed: add a worker-ready handshake that
makes the supervisor enable synchronization only after initialization, or queue
SyncCache messages until the handler is ready. Preserve the existing
dumpEffectCache and CacheSynced response flow once ready.

In `@packages/envio/src/Supervisor.res`:
- Line 164: Update the cache-sync handling around r.onCacheSynced so overlapping
/console/syncCache requests do not overwrite an active waiter; retain a single
group-level in-flight promise or track all pending resolvers and resolve them
together when CacheSynced arrives, while preserving the existing completion
behavior.

---

Outside diff comments:
In `@packages/envio/src/Supervisor.res`:
- Around line 199-211: Update Supervisor.fork and the awaitExit lifecycle flow
so each child has its onExit and onChildError handlers registered before or
immediately as it is forked, rather than only after group and server setup
completes. Retain the resulting await promises and await them after setup,
ensuring no child lifecycle event can be missed while Array.mapWithIndex is
still creating workers.

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Two ways the supervised /console/syncCache could wait forever: a second request overwrote the first one's waiter, and a request that reached a worker before its handler was installed was dropped. Overlapping requests now join the dump already in flight, and a worker holds what arrives while it is still coming up. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

DZakh · 2026-09-16T10:45:28Z

Both cache-sync findings were real and are fixed in 0f12b89: overlapping /console/syncCache requests now join the dump already in flight instead of overwriting each other's waiter, and a worker holds messages that arrive before its handler is installed rather than dropping them. Each has a test that fails without its fix.

Not taking the third one, on registering child lifecycle handlers before forking. run forks and then reaches await group->awaitExit with no await in between — Main.startServer, Tui.start and the signal handlers are all synchronous — so onExit and onChildError are registered in the same turn that forked the children, and Node emits neither before the next tick.

Generated by Claude Code

…d report every process's runtime metrics A worker is now the process the supervisor forked: told by the argument it was forked with together with the fork's own channel, rather than by an environment variable of its own. A user who types the argument starts nothing, and a process manager that forks with a channel changes nothing. A terminal's interrupt reaches the workers as well as the supervisor. Workers now leave it alone: the supervisor is the one that stops them, so a worker gone on its own can no longer read as a failure to a supervisor still deciding what the interrupt meant. A finished run held up by its display exits on the next stop signal instead of holding it, since the supervisor's own handler had taken over from Node's default exit. `/metrics/runtime` reported the supervisor's heap and event loop alone. Every process of the run now reports under a `worker` label, the supervisor included, from the runtime sample each worker sends with its snapshot. Log context names the one chain an isolated process drives and nothing else; a process driving several has no single owner to name. The split_test scenario and its e2e suite drive a real split run: two chains over a per-chain schema, a budget of four connections, every process on one metrics endpoint, one exit once both chains are done, and one interrupt to the supervisor ending them all. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

…k argument ENVIO_INTERNAL_WORKER replaces the argument the supervisor forked its workers with: nothing to show in a process listing, nothing to read off argv before the CLI sees it. It still counts only together with the fork's own channel, so a copy left in a shell starts nothing. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

`worker="1,137"` in place of `worker="0"`: an index says nothing about whose heap or event loop a reading is, and the chains are what an operator wants to know. The supervisor's own readings keep `worker="supervisor"`. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

DZakh · 2026-09-16T13:19:48Z

hypersync-health-check is red on 662deb2, and it isn't this PR's. It fails in all_supported_endpoints_are_healthy on a DNS lookup, after three retries:

Failed to fetch health for https://1923.hypersync.xyz after 3 retries:
dns error: failed to lookup address information: Name or service not known

The same job fails the same way on main (run 35100517541, head f5c17a8), there on https://1284.hypersync.xyz — a different endpoint, same DNS error, from a run that started a minute later. This diff touches no chain endpoint list, so it is the runners' name resolution, not the branch. There's no fix to port; I'll re-run the job once this run finishes, and keep watching.

Every other job on this head is green so far, the new split-run e2e suite included; both envio-tests jobs are still going.

Generated by Claude Code

The supervisor's own heap and event loop carry nothing the indexing runs on, so its readings no longer sit beside the workers' under a label of their own. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

An indexer enters the reorg threshold and stamps every chain ready as a whole, which a process driving part of a run can't decide for itself: its own chains reach the head while another process is still backfilling. A worker now holds both transitions until its supervisor, the only one who sees every chain, says the run has arrived — so a split run switches over exactly where an unsplit one does. A chain with no reorg threshold is held by the same gate rather than racing ahead of the chains that have one. The supervisor holds nobody when every chain resumed already caught up, and counts a chain that resumed realtime or reached its end block as arrived, so the barrier can always be opened. A held worker also stays for the run at its end block instead of exiting with the indexes it still owes. What a worker is told now rides entirely in the fork's environment, as a JSON value beside the budget and the log file it already carried: a worker parses the same config its supervisor did and narrows it to the chains it was handed. The storage it resumes already refuses a config that disagrees with the one the run was created from, which is a stronger guarantee than the handover message it replaces. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

`ENVIO_INTERNAL_WORKER` is read as the module loads, before anything that could catch a bare schema error and say where it came from. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

…ether-89upid

The suite asserted the run's exit code and its rows, both of which a worker that exited at its end block owing the schema its deferred indexes would still satisfy. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

Gating `isCaughtUp` stopped a resumed process ever recording that it owed the schema its deferred indexes. `markCaughtUpOnResume` decides that from persisted state before any source request precisely because no later reading can: once the head has moved on, a chain committed at what was the head looks behind again. A supervised worker resuming such a chain could therefore never report itself arrived, and its run would wait for good. The hold belongs on the transition instead — the finalization that commits `ready_at` and switches the indexer to realtime — leaving the record of what is owed to be made as it always was. What a worker reports is then its own conclusion rather than a reading its supervisor reassembles, which is also the only form that carries the resumed case. A chain that caught up never un-catches up, so a metadata write staged before the stamp can no longer clear it on its way to the database. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

A scenario with more than one chain can run a second time the way a supervised worker runs: held, and released by the real predicate over its own metrics. A split run can't be simulated here, since the sources a test drives are objects in this process that a forked worker wouldn't have, but the hold, the predicate and the release are the production ones. Off unless a scenario asks for it. A describe block's counters are incremented by both passes and most bodies assert on them absolutely, so turning it on everywhere means making those counts independent of how many times a body runs first. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

Thirty-seven of them now run twice: once plainly, once the way a supervised worker runs, released by the real predicate over the run's own metrics. Opted out are the suites that stage their chains at different heights and drive the reorg-threshold transition themselves. The hold defers exactly that transition until every chain is at the head, which is the premise those bodies set up — a scenario there would be re-running against a precondition it had just been denied, not covering more ground. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

"All events have been fetched" claimed three things it didn't mean. It is one chain's line, not the run's, so a five-chain run printed it five times, each saying "all". Fetched is not processed and not ready: the buffer still holds events, the deferred indexes are still to build, and the line opened the longest silence in a run rather than closing it. And below the reorg threshold a chain may only fetch the finalized range, so what it had reached was the safe block, not the head. It now names the block it reached and what it reached — the safe block, the chain head past the threshold, or an end block — carries what is left to process, and says whether anything else has to catch up first: the chains this process drives, or, for a supervised worker, the ones its siblings do. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

A held process waits on chains it doesn't drive, so it says so even when it drives only one. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

The line was gated on the backfill→head transition, which re-arms every time the head advances: the frontier falls behind it, catches up, and the transition happens again. `!isReady` held that back only once a chain was ready, so the line repeated for as long as it wasn't — which a supervised worker now is for as long as the run holds it. A chain reports what it reached instead, and only the first time it reaches it. The safe block, the head past the reorg threshold and an end block are different milestones, so each still gets its line. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

Finalizing a schema with no indexes logged that all zero of them were in place and then that zero of them had been committed. The line that matters there is the indexer reporting itself ready, which finalization already logs; these two only have something to say when there are indexes to report on. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

A chain held below the reorg threshold keeps the lag that pins its fetch frontier to the safe block. Where the head sits within a reorg depth of the start block, that lagged head is below anything the chain would ever fetch, so it reads as settled at a head it never reached — and the run, released on that, finalized and reported itself ready having indexed nothing. What a held process may conclude from a live reading is only that it has fetched as far as the lag allows, which is what it now reports as having arrived. Catching up is a conclusion it draws once released, except on a resume, where it is read from what was persisted and the hold distorts nothing. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

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Ignore the split_test scenario's codegen output

09d29fe

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

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Join a worker's chain ids with a semicolon in its metrics name

662deb2

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017CceLz4mPquMmpWrU74P3j

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Merge remote-tracking branch 'origin/main' into claude/intelligent-no…

9ee7c8a

…ether-89upid

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Pin the ready_at clause the metadata update now generates

7762236

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

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Say where the rest of a split run is without the possessives

0930bd8

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

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Leave how a run is split out of what a chain reports

283f69b

A held process waits on chains it doesn't drive, so it says so even when it drives only one. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KrhL53BgXb1sHUeDBJx5PH

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Drop the buffered count from the line a chain reports

ff3cf0a

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Split an indexer across processes when the connection budget affords it - #1646

Split an indexer across processes when the connection budget affords it#1646
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Raising the budget is what splits a run

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