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feat(sync): mutation sync: ordered pushes, consistent pulls, rebase and restore epochs - #65
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…e planner tests/mutations/protocol.spec.ts: counters read back as safe non-negative integers from decimal text, numbers and bigints, and nothing else; a push whose ids rise from 1, and the pushes the wire contract refuses (a stray key, a bad id, ids that do not rise, too many mutations, an unknown name, bad arguments, none at all); a pull answer that names a row twice, and a refused result with no reason. The row mutators against a view of rows and recorded results: create, edit, delete and repair with the copy policy, the copy id derived from the group, the client and the mutation id, a dependent edit followed to its earlier mutation's copy, a dependent delete or edit compared at the revision an earlier no-op recorded, and unreadable rows and copies counted toward the row limit. The save planner's creates, edits and deletes, and a save that names a row id twice.
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Check name Status Explanation Linked Issues check Issue #55is open and directly linked. The newsrc/features/sync/mutations/module implements the requested named-row protocol: ordered per-client mutation IDs in transactional pushes, monotonic pul…Out of Scope Changes check The whole-PR changes add the mutation-sync modules, export them from ./sync, and add their protocol, server, client, transport, loop, adapter, and recovery tests. These changes implement coding requ…Title check The title clearly summarizes the main mutation-sync changes, including ordered pushes, consistent pulls, rebasing, and restore epochs. Description check The description follows the repository template, explains the implementation and rationale, includes completed checklist items, and references issue #55.Full details: Linked Issues check
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Explanation
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#55is open and directly linked. The newsrc/features/sync/mutations/module implements the requested named-row protocol: ordered per-client mutation IDs in transactional pushes, monotonic pull cookies, snapshot-consistent batched streams, deterministic copies, restore epochs with a journal, and deletion drain gating. The module and tests also cover durable client commits, rebasing, refusals, recovery, joins, removal, and cross-tab change notification. The current head also contains the required existing support forIndexedDbAdaptercommit durability,memoryOnly,reload(), Web Locks and stamp coordination, marker-backedmigrateIndexedDbKeyValue, and paginatedS3StorageProvider.list.
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Explanation
The whole-PR changes add the mutation-sync modules, export them from
./sync, and add their protocol, server, client, transport, loop, adapter, and recovery tests. These changes implement coding requirements in issue#55. The existing IndexedDB, migration, and S3 support is used as current-head evidence and is not an unrelated change introduced by this PR. No unrelated change is demonstrated.
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Reviewer's GuideIntroduces comprehensive protocol-level tests for mutation synchronization, covering counter and wire validation, ordered row mutation outcomes, deterministic conflict copies, recovery of dependent mutations, deletion gates, repair semantics, capacity limits, and save planning. File-Level Changes
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…ir copy policy src/features/sync/mutations/counter.ts: readCounter, writeCounter and nextCounter keep mutation ids, versions and cookies as decimal text, read back as safe non-negative integers before any arithmetic; ids start at 1 and never wrap; CounterError names no value. src/features/sync/mutations/wire.ts: the push, pull and answer types and their parsers (parsePushRequest, parsePullRequest, parsePullResponse, parsePushAnswer, parsePullRefusal), which refuse any other shape with a WireError that names the field, never its value. src/features/sync/mutations/rows.ts: create, edit, delete and repair on named text rows (applyRowMutation), settled by the server's order with a copy whose id is derived from the group, the client and the mutation id (copyIdOf); a mutation that names an earlier mutation's revision follows that mutation's recorded result, and copies and unreadable rows count toward the row limit. planRowChanges turns a save into the mutations it needs. src/features/sync/mutations/index.ts: the module's exports, the tab lock among them. src/features/sync/index.ts: the sync entry exports the module.
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…apless, fenced deletes, tombstones tests/mutations/harness.ts: the world the server suites run in, one database from the suites' backends with the reference store's tables under the test's prefix, one scope with one group, an epoch the test can change, and a codec that binds a value to its scope and row; push and pull helpers that read a pull's whole stream as a transport does. tests/mutations/server.push.spec.ts: on sql.js, better-sqlite3 and Postgres, a push commits its effects, results, last id and version together and a repeated push applies nothing twice; a batch past the next expected id aborts with nothing written; the deletion hook sees the accepted deletes alone, a throw rolls the push back whole, and the batch is taken again after its deletion is replayed; a no-op records the revision the row had and a dependent mutation is compared against it; a permanent refusal consumes its id while any other failure consumes nothing; a tombstone refuses a create for the group's life; a resent create after another client's delete is skipped; a changed epoch is answered before any read and another group after its group row alone.
…pec.ts; its apostrophe ended the single-quoted string, so the file did not parse
…ll from one transaction, tombstone replay, and a reference SQL store src/features/sync/mutations/server.ts: MutationServer over a store port the caller implements (MutationServerStore). push runs a client's mutations in id order in one transaction under the group's row lock: an id at or below the client's last is skipped, one past the next expected id aborts the batch with nothing written, and the effects, the results, the client's last id and the group's new version commit together. A permanent refusal consumes its id; any other failure, a throw from the beforeWrite hook among them, rolls the push back whole. The hook sees the accepted deletes before anything is written. pull answers a changed epoch, another group or a cookie past the version before any row is read, and otherwise streams one JSON answer from one transaction: the version, the rows in batches, the client's results and every client's last id. replayTombstone writes a deletion fence's tombstone at the group's next version and touches no client's last id; an existing tombstone is kept. ValueCodec seals and opens a stored value, and a value it cannot open makes the row unreadable, never absent. src/features/sync/mutations/handOver.ts: a one-slot hand-over that keeps a pull's transaction open until its consumer has taken the last chunk; cancelling refuses the waiting chunk, which rolls the transaction back. src/features/sync/mutations/sqlStore.ts: a reference store on four tables of its own under a prefix, for SQLite and Postgres alike; on Postgres a pull reads in REPEATABLE READ and a push or a replay waits at most lockTimeoutMs for the group's row lock. src/features/sync/mutations/index.ts: the three modules' exports.
… and the drain gate tests/mutations/server.pull.spec.ts: on sql.js, better-sqlite3 and Postgres, a full pull streams in batches of two from one snapshot while another push commits (Postgres commits it between the pull's reads, a SQLite connection holds it until the pull's transaction ends), and the next delta pull carries that push alone; a stream dropped before its end or whose request is aborted ends its transaction, and the next push and pull go through; a row whose stored value was moved from another row is carried as unreadable; a cookie past the version, another epoch and another group are refused before any row is read; a deletion's block on the gate cancels a stalled reader and the gate drains within its deadline. tests/mutations/gate.spec.ts: a blocked key turns new requests away and cancels the ones inside at once; a drain answers drained once the last request inside leaves and stuck past its deadline; a key stays blocked until every block on it is released; a cancel that throws leaves the block standing, the other requests cancelled and one log line written.
…d waits for them to leave src/features/sync/mutations/gate.ts: DrainGate, the gate a server's sync requests pass while they can read, commit or send rows. A request enters under its keys (a scope's, a group's) with a function that cancels it and holds a GateLease until it ends. A deletion's block on a key turns new requests under it away with GateBlocked, cancels the ones inside at once, and its drain waits for them to leave up to a deadline, answering drained or stuck. A key stays blocked while any block holds it. A cancel that throws is logged through the host logger and the block goes on, so the other requests inside are still cancelled and the deletion keeps a block it can release. The gate is one process's; a server whose sync routes run in several processes holds its own across them. src/features/sync/mutations/index.ts: the gate's exports.
… offs and restores against three databases tests/mutations/harness.ts: the browser half: a loopback transport into the world's server that can go offline, lose a push's answer, hold a pull's answer and refuse a push over a byte limit as a 413 does; browsers whose blocks a materializer writes, over an in-memory IndexedDB adapter or one the test gives; settle; and a dump and a restore of the server's tables that changes the restore epoch. tests/mutations/client.spec.ts: against a server on sql.js, better-sqlite3 and Postgres: a join hands three rows to a second browser, and creates, edits and deletes converge; mutation ids rise across a reload and a second tab whatever the clock says; a lost push answer applies once, and an older pull answer is dropped with the edit made meanwhile kept; forty values of 30,000 code units travel in several pushes; a push refused as too large is split in order, and a mutation refused alone stops the sends; a value too long stays in its browser and a refused one is kept; two offline edits of one revision converge in either order with one copy; a save whose durable write IndexedDB refused is gone whole, and under crossTab with rollbackRefusedSaves a statement queued behind it stores nothing of it; a no-op create is followed to the revision it recorded; and packing by the exact UTF-8 bytes of the request. tests/mutations/client.join.spec.ts: identical unmarked blocks merge once and a differing block of the same id becomes a copy; a block unchanged since an off takes the account's value, and a deletion made while off is not sent; a decline sends nothing; an old group's refused push keeps its text, and an old answer cannot clear the new membership. tests/mutations/client.restore.spec.ts: a restore is found by its epoch after the counter passed the old cookie, and the journal's mutations go again with their ids; a replayed deletion fence removes an unchanged downloaded row; a healthy local block stays beside a differing restored row until the account matches it; a journal with a hole retires the client and keeps its pending values.
…ps, and every other answer as SyncUnavailable tests/mutations/transport.spec.ts: against a server on sql.js, better-sqlite3 and Postgres, a push and a whole pull travel through push and pull routes over the server, with quotes, a newline and multibyte text in the value, and the pull route's refusal of an old epoch comes back as the protocol's refusal. With a stubbed fetch: 413, 429 with and without Retry-After, 400 and a status the caller's refusal hook maps become the refusals the client reads; an answer cut short, a body of null or a number, another answer's shape, a 500 and a refusal the pull does not take reject with SyncUnavailable, as do a failed request and one past its deadline.
…, an atomic pull apply, packed pushes, joins, leaves and restore recovery src/features/sync/mutations/client.ts: MutationClient over any StorageAdapter, its tables beside the caller's data under a prefix (sync_ by default): the membership with its group, client id, activation, restore epoch, cookie and next mutation id; the canonical rows; the pending mutations and a journal of every mutation it issued in its group; its own results; the comparison base an off leaves; and the rows it keeps alone with their reasons. Every operation runs under the client's tab lock on a freshly reloaded image in one transaction; an IndexedDbConflictError runs it once more, and any other failure reloads the stored image before the error leaves the lock. A save commits the caller's data with its mutations and their journal records; a value too long for the account stays in the browser. A push sends the pending mutations in id order, splits a batch the route refuses as too large, and stops the sends on a mutation refused alone. Only a pull acknowledges: a complete answer is applied while its context and cookie hold, refused values are kept, the processed mutations dropped and the rest replayed by the server's row mutators, and the caller's materializer receives what became visible. A join stages a full snapshot before it merges the caller's blocks: an identical unmarked block takes the row's id, a marked block identical to the account's or unchanged since the last off takes the account's value, and every other block is created under its id. A decline and a leave keep the caller's data. A changed epoch keeps every downloaded row aside, takes a full snapshot and pushes again from the journal what the restored server lacks; a journal with a hole retires the client. src/features/sync/mutations/transport.ts: MutationTransport, SyncUnavailable and createFetchMutationTransport, which reads a response's whole body before it parses any of it and maps 413, 429 and 400, or what the caller's refusal hook maps, to the protocol's refusals. src/features/sync/mutations/packing.ts: packMutations and requestBytes: batches in id order by the exact UTF-8 bytes of the request they travel in. src/features/sync/mutations/index.ts: the three modules' exports.
tests/mutations/client.spec.ts: the case that carries forty values of 30,000 code units took 2 to 3 seconds per database on a CI runner against the 5-second default; it now has 20 seconds, so a slower runner does not fail it.
src/features/sync/mutations/client.ts: a push schedules nothing, the pull after it acknowledges; under crossTab the adapter also needs rollbackRefusedSaves for a statement queued on it behind a refused save; the kept rows that become differing or removed are the ones kept across a restore, kept unreadable or already differing; the conflict and roll-back comments name the IndexedDB adapter's options as they are spelled.
…; unreadable repair; a kept row put back tests/mutations/client.removal.spec.ts: against a server on sql.js, better-sqlite3 and Postgres: a downloaded row a restore lost stays kept across a reload, a failed apply and a second restore until an explicit save puts it back; a block is backed only by a readable account copy of the same id and text with nothing pending, and the check does not run while a mutation is pending or a recovery is open; a removal holds every save, a confirmation another tab changed is void, and the removal leaves a declined choice with a new activation and no sync record; an unreadable row is repaired at its revision with the healthy text; a browser that never joined is removed at once; an off learned under an open question voids the confirmation, and a check that could not run removes nothing; a removed row is never put back under its tombstoned id; and a save that issues no mutation leaves the stamp as it was.
…pairs, and a kept row put back src/features/sync/mutations/client.ts: beginRemoval and cancelRemoval hold and release every save (RemovalInProgress); backedUp checks each block against a readable canonical row of the same id and text, only while joined with nothing pending, no recovery open and sends open, and answers a stamp of the client's own records (state, activation, group, epoch, cookie, counters, kept rows); removeAll deletes every sync record of the scope and runs the caller's removal in the same transaction, refusing a changed stamp (RemovalInvalidated), and while joined it runs only inside a removal with the stamp of a check that ran (RemovalNotStarted otherwise), leaving a declined choice for the group with a new activation. repairUnreadable issues a repair at the kept revision for each row the account still holds unreadable there, and restoreKept puts a kept row back with a create under its id, never a removed or unreadable one.
tests/mutations/loop.spec.ts: a loop over a client that records its calls pushes and pulls at once on start, pulls every 60 seconds while the page is visible and never while it is hidden, and again when the page becomes visible; a failed cycle is tried again after 2 seconds, doubling to 300, and the pace comes back once a cycle succeeds; a save pushes at once, a kick during a cycle runs one more cycle after it, and a rate refusal is waited as long as it asks.
…'s tabs src/features/sync/mutations/loop.ts: SyncLoop runs a cycle (a push, then a pull) at start, at once on a save, when the page becomes visible, on reconnecting and on sign-in, and every 60 seconds while the page is visible; a failed cycle is tried again after 2 seconds, doubling to 300; a rate refusal is waited as long as it asks; one cycle runs at a time and a kick during a cycle runs one more after it; attachSyncLoop kicks it on visibilitychange, focus and online and answers the detach. src/features/sync/mutations/channel.ts: changeChannel tells a page's other tabs that the client committed, through a BroadcastChannel where the page has one. src/features/sync/mutations/index.ts: exports both modules.
…listener, the page's events and the change channel tests/mutations/loop.spec.ts: a kick during a rate refusal's wait, or during the cycle the refusal ends, runs nothing until the wait is over, and a stop drops the wait so a start runs at once; an error listener that throws leaves the retry in place; attachSyncLoop kicks on becoming visible, on focus while visible and on coming online, and nothing after its detach; changeChannel tells another channel of its name, a detached listener hears nothing more, and without a BroadcastChannel it is silent.
…or listener leaves the retry in place src/features/sync/mutations/loop.ts: while a rate refusal's wait runs, a kick runs nothing, and a kick during the cycle the refusal ended is served by the cycle the wait's timer runs instead of one at once, so the loop never calls the server before the wait it was told; stop() drops the wait, so a start after it runs at once; an error the onError listener throws is dropped, so the cycle's retry is still scheduled and nothing rejects unhandled.
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PR Summary by QodoAdd ordered mutation sync with consistent pulls and restore recovery
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…d values through a restore, a failed join and wide counters tests/mutations/loop.spec.ts: a cycle that was running when the loop stopped and started again schedules nothing of its own, so a rate refusal it brings back does not hold the new run's first cycle; a start after a stop begins its retries from 2 seconds again. tests/mutations/transport.spec.ts: a rate refusal whose Retry-After is an HTTP date waits until that date; a date already past and a value it cannot read wait two seconds. tests/mutations/client.spec.ts: an edit too long for the account stays under its row's id, a second such edit adds no row, and a save that fits edits the row at the revision the long text was made against; a value the full account refused is kept under the id it was shown at while its refusal was pending; a client keeps a cookie, mutation ids and versions above the 32-bit range in its own tables on every database. tests/mutations/client.restore.spec.ts: a value the account refused before the dump is kept when the recovery pull acknowledges the refusal. tests/mutations/client.join.spec.ts: a join whose snapshot never comes leaves the membership off, not joining, and the next join merges the browser's rows.
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Inline comments:
Review comments at @src/features/sync/mutations/client.ts:
- Around line 727-728: In the `apply` recovery branch, call `dropAcknowledged`
before `rebuildPending` so refused acknowledged values are preserved before
pending rows are rebuilt; keep the non-recovery path’s behavior unchanged.
- Around line 744-746: In the refusal-handling block, derive the kept value’s ID
with the same `copyIdOf` inputs and live-target condition used by `visible()`,
instead of generating a random ID. Keep `result.targetId` for non-live targets
so the caller continues to see the refused value under the ID already shown.
- Line 437: In the join flow around `transport.pull`, reset the membership to
`off` using the same activation guard when the snapshot request throws, then
rethrow the original error. Reuse the reset logic for the existing non-pull
response path so both cases clear the joining state consistently.
- Around line 206-212: Update the counter columns in `clientDdl` to use `BIGINT`
instead of `INTEGER`: `cookie` and `next_mutation_id` in `membership`,
`rev_mutation` and `version` in `rows`, `mutation_id` in `pending`, `journal`,
and `results`, and `rev_mutation` in `results` and `kept`. Leave non-counter
columns unchanged.
- Line 247: Update plannedOf so a kept too_long row with a non-null revision is
treated as non-local, while preserving the existing unreadable-row behavior. In
the too-long edit handling, keep the row under mutation.args.id and retain
mutation.args.expected as its revision; creates should continue to use a null
revision.
Review comments at @src/features/sync/mutations/loop.ts:
- Around line 49-61: Update start() to reset retryMs to the configured initial
backoff, and update stop() and the in-flight cycle flow to track a generation
change. A cycle from an earlier generation must not change retryMs or schedule a
timer; if the restarted run deferred a kick while that cycle was running, let
that kick proceed.
Review comments at @src/features/sync/mutations/server.ts:
- Around line 250-282: Update the pull transaction flow around `handOver` to
support an optional `maxPullMs` setting on `MutationServerOptions`; when
configured, cancel the hand-over with `PullCancelled` after that duration so a
stalled reader cannot keep the transaction open. Clear the timeout when the
transaction finishes, and preserve the existing abort and iterator-return
cancellation behavior.
Review comments at @src/features/sync/mutations/transport.ts:
- Around line 44-47: Update retryAfterMs to support both numeric seconds and
HTTP-date values: when the header is not numeric, parse it with Date.parse and
calculate the delay relative to Date.now(). Return the existing 2000 ms fallback
for empty, invalid, or past values, while preserving the seconds-based behavior
for valid positive numbers.
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📒 Files selected for processing: 25
src/features/sync/index.tssrc/features/sync/mutations/channel.tssrc/features/sync/mutations/client.tssrc/features/sync/mutations/counter.tssrc/features/sync/mutations/gate.tssrc/features/sync/mutations/handOver.tssrc/features/sync/mutations/index.tssrc/features/sync/mutations/loop.tssrc/features/sync/mutations/packing.tssrc/features/sync/mutations/rows.tssrc/features/sync/mutations/server.tssrc/features/sync/mutations/sqlStore.tssrc/features/sync/mutations/transport.tssrc/features/sync/mutations/wire.tstests/mutations/client.join.spec.tstests/mutations/client.removal.spec.tstests/mutations/client.restore.spec.tstests/mutations/client.spec.tstests/mutations/gate.spec.tstests/mutations/harness.tstests/mutations/loop.spec.tstests/mutations/protocol.spec.tstests/mutations/server.pull.spec.tstests/mutations/server.push.spec.tstests/mutations/transport.spec.ts
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…ong edits and refused values keep their ids, and wide counters src/features/sync/mutations/loop.ts: a stop ends the run: a cycle that was running when the loop stopped schedules nothing of its own, even when the loop starts again before that cycle ends, and the new run's first kick runs at once; start() begins the retries from firstRetryMs again. src/features/sync/mutations/transport.ts: a rate refusal's Retry-After is read as delay-seconds or as an HTTP date, the wait running until that date; a value it cannot read, zero or a date already past waits two seconds. src/features/sync/mutations/client.ts: an edit too long for the account is kept under its row's id with the revision it was made against, and a save plans it as an edit at that revision, so a second long edit adds no row and a save that fits edits the row; a pull that ends a recovery keeps the values of the refused mutations it acknowledges before the pending set is rebuilt; a refused value is kept under the id the browser showed it at while the refusal was pending (the copy's id beside a live row) instead of a random one; a join whose snapshot request fails turns the membership off again before the error reaches its caller, as a refused one did; the client's counter columns are BIGINT, so a Postgres client keeps a cookie or a mutation id past the 32-bit range.
tests/mutations/server.pull.spec.ts: a server with maxPullMs of 50 cancels a stream whose reader took the first chunk and stopped reading; the stream's transaction ends without the reader, its next read is PullCancelled, and a push then commits at once.
…tops reading cannot hold it src/features/sync/mutations/server.ts: MutationServerOptions.maxPullMs (default 120,000 ms, the fetch transport's own deadline; Infinity sets no limit) bounds how long a pull's transaction stays open: a stream still open then is cancelled as an abort cancels it, its transaction rolls back, and the timer is cleared when the transaction ends.
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…un at once tests/mutations/loop.spec.ts: a rate refusal asking for 3,000,000,000 ms holds the loop for the longest wait a timer can hold, 2^31 - 1 ms, instead of the timer firing at once and the loop asking again every millisecond; the cycle runs when that wait ends.
…g rate refusal is not run at once src/features/sync/mutations/loop.ts: every wait the loop sets (a rate refusal's, a retry's, the pull pace) is held to 2^31 - 1 ms, the longest a timer holds; a longer one fired at once in browsers and Node, so a refusal asking for more set the loop asking again every millisecond.
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Inline comments:
Review comments at @tests/mutations/server.pull.spec.ts:
- Line 74: Increase `maxPullMs` in the `MutationServer` setup so transaction
startup can complete before the pull deadline, and keep the wait in the test
below the new deadline.
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src/features/sync/mutations/client.tssrc/features/sync/mutations/loop.tssrc/features/sync/mutations/server.tssrc/features/sync/mutations/transport.tstests/mutations/loop.spec.tstests/mutations/server.pull.spec.ts
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tests/mutations/server.pull.spec.ts: the case that stops reading set maxPullMs to 50 ms, and the deadline counts from the pull's call, so a transaction that took longer than that to start was cancelled before the reader took its first chunk and the case failed for a reason it does not test. The deadline is 500 ms; the wait for the stream's end stays at 2 s, well past it.
src/features/sync/mutations/server.ts: the option's comment called it how long a pull's transaction may stay open; its timer starts when pull() is called, so a pull's wait for a transaction counts toward it. The comment says so.
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Summary
A push, pull and rebase protocol for named text rows beside the cross-platform sync, in
src/features/sync/mutations/and exported from the./syncentry. Nothing that exists changes: the module is new and the entry adds its exports.counter.ts,wire.ts,rows.ts: decimal counters, the wire contract and its parsers, the row mutators (create,edit,delete,repair) with a deterministic copy policy settled by the server's order, and the save planner.server.ts,sqlStore.ts,handOver.ts:MutationServerover a store port. Each client's mutation ids are recorded in the push's own transaction, a monotonic version is the pull cookie, a pull streams its patch in batches from one snapshot and can be cancelled, and deletes are replayed from tombstones. A pull still openmaxPullMsafter its call (default 120 seconds, its wait for a transaction included) is cancelled and its transaction rolled back, so a reader that stops reading cannot hold it.createSqlMutationStoreis a reference store on the library's own tables.gate.ts:DrainGateblocks a scope's requests, cancels the running ones and waits for them to leave.client.ts,transport.ts,packing.ts:MutationClientwith durable saves and a journal, the rebase, the pull's atomic apply, packed pushes split on a 413, joining, leaving, restore epochs with the journal's replay, removal with a backed-up check, unreadable repairs and a kept row put back. A value too long for the account stays in the browser under its row's id (an edit with the revision it was made against, so a save that fits edits the row there), and a value the server refused is kept under the id the client showed it at while the refusal was pending, in an ordinary pull and in the pull that ends a recovery. A join whose snapshot request fails turns the membership off again, as a refused one does. The client's counter columns areBIGINT, as wide as the protocol's counters on every database.createFetchMutationTransportstages a whole answer before reading it and readsRetry-Afteras seconds or as an HTTP date.loop.ts,channel.ts:SyncLooppushes then pulls at start, at once on a save, on becoming visible, on reconnecting and on sign-in, and every 60 seconds while the page is visible. A failed cycle is tried again after 2 seconds, doubling to 300. A rate refusal is waited as long as it asks, up to the longest wait a timer holds (2^31 - 1 ms), and no kick runs a cycle before that wait ends.stop()drops the wait and ends the run: a cycle still running schedules nothing of its own, even when the loop starts again before it ends, andstart()begins the retries from 2 seconds. An error theonErrorlistener throws leaves the retry in place.attachSyncLoopkicks the loop on the page'svisibilitychange,focusandonlineevents;changeChanneltells the page's other tabs of a commit through a BroadcastChannel where the page has one.The server and client suites run on sql.js, better-sqlite3 and Postgres, and one client case keeps the client's own tables on each of them.
Checklist
Related
Closes #55
Summary by Sourcery
Implement ordered mutation synchronization for named text rows with transactional server processing, consistent pulls, client recovery, deterministic conflict handling, and restore-safe state management.
New Features:
Bug Fixes:
Enhancements:
Tests:
Summary by CodeRabbit