Commit graph CultLib/src
Author SHA1 Message Date
Meta Vens
972e7b2ed4 Caching: a reference gained on an otherwise identical slot is compatible drift (1.0.x ref-list stores open); 2.0.1
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 22:16:14 +02:00
Meta Vens
ef45e4ed82 org.gamecult.cultlib 2.0.0: the parser's comment and the flush bullet state the exact stamp rule; declare the nil-stamp refusal (Soul s5)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-22 19:03:29 +02:00
Meta Vens
4a14f17270 Public DeserializeSnapshot parses any stamp as in 1.0.61; stores judge the v1/v2 stamp in their own read paths; flush prose states the exact rule; the I/O refusal test asserts no write was reached
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 18:34:15 +02:00
Meta Vens
6adc321a73 Caching: a binary-encoded stamp is refused; directory manifest readers name their stamp rule; the I/O refusal test fails the real read
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 17:33:24 +02:00
Meta Vens
39e8ab5efd Single-file and directory snapshot reads judge the format stamp before parsing the body; a flush heals an empty or truncated file
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 17:30:57 +02:00
Meta Vens
0bf11ddc94 Caching: SingleFileBackingStore.PushAll owns the flush guard; it reads the disk as attach and commit do, ReadFormatVersion is deleted
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 17:00:10 +02:00
Meta Vens
afd4858b9a Caching: qualify FormatNumber at the single-file flush guard
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 16:43:37 +02:00
Meta Vens
d44188637d Caching: a plain flush and a directory write refuse a store another process stamped newer since attach
Single-file PushAll reads the format stamp under the lock and refuses cultcache.store.v<N> with N > 2;
the directory store throws NotSupportedException for N > 4 from the manifest parse every write already runs.
An unreadable stamp keeps today's behaviour.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 16:43:11 +02:00
Meta Vens
8b47a2e8d9 Caching: PersistedSchemaId and MarkWritten are internal for 2.0; Mesh single-file write guard in the CHANGELOG
C2a's StoredVersion owns the same identity and deletes both. No consumer outside CultLib uses them,
so they do not ship public in 2.0.0 and C2a's release is not a major.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 15:57:01 +02:00
Meta Vens
7678148c1a CultMesh single-file write reads what it replaces: refuses a newer-format, unreadable or larger store
The write replaced the file without reading it, so a 2.0 writer pointed at a store a newer
format stamped (or one holding other records) destroyed it.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 15:55:42 +02:00
Meta Vens
6bdf88e281 Release prep: org.gamecult.cultlib 2.0.0 and org.gamecult.caching.unity 2.0.0 versions, changelogs, install docs
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22 15:44:39 +02:00
Meta Vens
4a1c2df698 Store-composition contract: MarkWritten guards accidental marks; a mark is the store's own claim
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-21 22:10:26 +02:00
Meta Vens
22eaaabeb2 Caching docs: MarkWritten refuses an entry the store does not hold (contract, CHANGELOG)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-21 21:59:38 +02:00
Meta Vens
afd799ba8d Caching: CacheBackingStore.MarkWritten is an instance method that refuses an entry the store does not hold
A protected static mark let any subclass mark another store's or cache's
entry. The instance form throws ArgumentException unless the entry is the
one this store holds in its own Entries at that key. Both library stores
already mark only their own entries, so their calls are unchanged.

Finding cultlib-gaps:finding:cut-expect-persisted-schema.s2.markwritten-unscoped.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-21 21:59:38 +02:00
Meta Vens
73d438dbcf CultCache: every backing store marks the records it rewrites, through a protected CacheBackingStore.MarkWritten
The directory store's write of a generation marks each page it wrote once the
manifest names it, so a Push+PushAll of a loaded drifted entry no longer leaves
its persisted schema id stale. The single-file store marks through the same
member, and a store outside GameCult.Caching now has a supported way to mark
its own rewrite. The getter's doc names how a store records a rewrite.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-21 21:41:53 +02:00
Meta Vens
c681af39d9 store-composition contract: identity is the persisted schema id plus storedAt
The claim that every write mints a later storedAt is false for a whole-file write, which keeps storedAt and rewrites a drifted record under the writer's schema. State what the identity is and what a rewrite does to another cache's Expect.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-21 21:05:29 +02:00
Meta Vens
3f6dda8b36 CultCache: conditional commit compares the schema id a record is persisted under
The six reads that took Descriptor.SchemaId as a record's durable identity (ConditionsHold, Expect, the store-less commit, both pull filters, JudgeMerge) now read CultStoredDocument.PersistedSchemaId. The store sets it from the record it read, a stamped entry starts at its descriptor's id, and a completed whole-file write (single-file PushAll, whole-view CommitBatchCore) resets it under the hold. A variant and its resolved view share it. An unchanged record loaded under compatible drift now satisfies Expect and ExpectUnchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-21 21:05:23 +02:00
Meta Vens
ed432b59da cultcache-ts 0.14.2: version, CHANGELOG, README persistence model, store-composition contract
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-20 14:54:14 +02:00
Meta Vens
3de72c6333 Content vectors: C#-written acceptance cases, trap inputs for keys, padded pack vector
CultMeshContentVectorTests writes content-acceptance-vectors.json (what the reference accepts, refuses, rewrites and
keys over nil, arity, trailing, integer/float, string-family and invalid-UTF-8 shapes), extends the record-key
vectors with the prefix-fold, fallback-hash traps, and the TS writer adds a whitespace-version, padded kind and
MIME pack vector. GameCult.Mesh exposes internals to its test project so the judge can call ValidateManifest.
The generated files follow.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-19 15:40:55 +02:00
Meta Vens
1330362235 CultPhasor rename: README, design note and both changelogs
cultmath-unity [Unreleased] and cultlib [Unreleased] carry the Breaking entries; no version bump, no tag.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-17 19:28:25 +02:00
Meta Vens
58baccce78 CultMathJson writes CultPhasor as cosine/sine and still reads cos/sin
Fields takes an optional legacy name per field, matched on read only and mapped to the same index as the current name, so a legacy and a current name in one object are the same property and the duplicate rules decide (refused when AllowDuplicateProperties is false, last wins otherwise). Writing never emits a legacy name. MessagePack bytes are unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-17 19:28:09 +02:00
Meta Vens
d605c70bba CultPhasor.cos/.sin become .cosine/.sine in C# and HLSL (GLSL regenerated next)
SPIRV-Cross renames members matching GLSL builtins, so the source names change. Resolver and JSON writer accessors follow the members; the wire (positional MessagePack, JSON keys) is untouched in this commit. The committed GLSL is stale until its regeneration commit, so CommittedGlslEqualsLowering fails here.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-17 19:25:39 +02:00
Meta Vens
fc3bdc70e8 Caching: MessagePack and JSON shapes for CultSiteCells, pinned
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-16 18:16:37 +02:00
Meta Vens
52d25740ac caching: MessagePack and JSON shapes for SpanPath and SpanStage
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-15 20:49:31 +02:00
Meta Vens
427d81feda GameCult.Caching: SpanNoise MessagePack and JSON shapes
MessagePack [field, curvature, fold] beside CultPhasor in CultMathResolver, JSON {field, curvature,
fold} in CultMathJson; round-trip, hex and JSON golden cases beside CultPhasor's.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-14 20:48:44 +02:00
Meta Vens
d47811c323 ExprGraph resolver: nil is nil, decode refuses non-canonical encodings, pin nested shape, nil-name and depth rules
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-14 07:54:32 +02:00
Meta Vens
defe2b80de Document CultMath.Expr: design.md Expressions section, resolver README
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-14 06:05:19 +02:00
Meta Vens
dc302a96a7 CultMath.Expr: scalar SSA expression graph, builder with substitution, one validator, evaluator, MessagePack shape
ExprGraph (immutable class, one validator in Create), ExprBuilder (hash-consing, dead-node removal, Substitute), ExprOps (the one op table), ExprEvaluator, ExprBindings, ExprGraphException; CultMathExprResolver appended to the default chain after CultMathResolver.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-14 06:05:18 +02:00
Meta Vens
abf624ab04 C# reference: one payload nesting bound (256) on read and write, nil arm slots refused, bounds vectors
CultPayloadDepth.Check walks MessagePack headers iteratively and refuses the first
container past CultMessagePackSecurity.MaximumPayloadDepth, read or skipped, called by
SerializeUntyped (on the bytes it produced) and DeserializeUntyped (before decoding).
UntrustedData's 500 is replaced by the same value as a backstop. CultUnionGuard refuses
[k, nil] arms. New vectors in tests/vectors/union-parity, with bounds-outcomes.msgpack
as their data; the gate now runs every Check-calling test body and fingerprints bytes
and write times. All commits build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-11 08:33:15 +02:00
Meta Vens
b4edbb1eeb Union golden: the store's clock is an internal seam, the writer pins it, the gate test runs under any switch
CultCache mints storedAt from an internal Clock (default the wall clock); the vector writer pins it, so
union-surface.cc is regenerated in process and byte-compared on every run. The gate test sets the switch
itself and writes only a probe, so it neither skips nor touches a committed vector.

This commit does not pass: union-surface.cc still holds the old wall-clock stored-at; the next commit
regenerates it. Builds.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-11 02:58:54 +02:00
Meta Vens
3042757701 Union guard: name an out-of-range or non-integer arm key, pin interface unions, name the schema on a variant refusal, changelog the exception type
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-10 23:48:49 +02:00
Meta Vens
506ec8c540 Union guard: the store refusal is readable from its outermost message; a consumer formatter for the union is wrapped, not replaced
Manual mutants survived: the record key and schema id were only asserted through the
cause chain, and an inner built from StandardResolver alone passed every test.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-10 22:56:53 +02:00
Meta Vens
ee227bb782 Contract and changelog: unions refuse an unknown arm and an unnamed subtype
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-10 21:34:57 +02:00
Meta Vens
6254da0c88 CultCache: refuse an unknown union arm on read and an unnamed subtype on write
A guard ahead of MessagePack-CSharp's union formatter decides both; the store
decode site names the record and schema.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-10 21:17:56 +02:00
Meta Vens
e1bdf92321 C#: an unsendable goodbye names the failure by a fixed code
EndUnsendable put the SocketException's message on the wire, the
platform's wording. SendErrorCode names a permanent failure EMSGSIZE,
EINVAL or EAFNOSUPPORT, anything else UNKNOWN, so every runtime's
unsendable goodbye reads "packet could not be sent: CODE" with the same
codes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 23:04:40 +02:00
Meta Vens
daedfdd658 Merge CultCache R1: typed read failures, no empty-file stores, no echoed values, typed write outcome
Only "nothing at the path" reads as an empty store; a zero-byte file is Undecodable in every
runtime; a dangling link is an I/O error. Errors name keys and schema ids only, never stored
values, and echo a header only in the cultcache.store.v<digits> shape. Single-file writes
report NotReplaced / ReplacedNotDurable / Rejected; an unlock failure after a successful write
no longer replaces the write's result.

Soul passes 1-3; batch 4 closes pass 3. Merged tree 9d9e76d4 verified on Yggdrasil: Rust
(cultcache, cultnet, cultmesh), cultcache-ts 44 including the four-runtime interop test,
cultnet-ts 198, cultcache-py 47, GameCult.Caching.Tests 346.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 21:13:24 +02:00
Meta Vens
ce63ff88dc C#: a handler's fault ends the session without blaming the peer
The schema server's backstop ended every session with "session refused
a packet", including when the fault was the server's own: for example a
handler's response too large to send, or a refusal the handler did not
type. Decoding and handling are now two catches:
- A message that cannot be decoded is the peer's. The session ends with
  the refusal reason.
- A handler fault ends the session with "server could not handle a
  message".
The transport's EndRefusedPeer becomes EndPeerSession(peer, reason). It
reports whether it ended the session, so the log says when a response
that failed after its first fragment had already ended it over the send.
Before, the log reported that it ended a session that was already gone.

The comment said that ending the session matched cultmesh-py. It does
not: Python silently skips a malformed frame. The honest anchor is the
C# TCP schema server, whose ServePeerAsync ends the one peer whose
message fails to decode or handle. The comment now says so.

Pinned, each by a test that kills its mutant:
- a handler fault's goodbye carries the server's reason, not the refusal
  (mutant: the refusal reason);
- the post-fragment-0 path logs that the session had already ended
  (mutant: a constant outcome);
- EndPeerSession says no goodbye to a replaced peer's endpoint (mutant:
  the Ended check dropped);
- a refused peer's frames still queued are never handled (mutant: the
  queue purge dropped).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 20:19:29 +02:00
Meta Vens
b37f898465 C#: a send failure on an already-ended session says no second goodbye
3b9ffac2 claimed that the generation check subsumed the UnsendableReason
once-guard. It did not. A thread that reads the generation only after
the session has ended carries the ended session's own generation, and the
check lets it through. For example, the polling thread answers a Ping on a
session that a caller's send has just ended but that has not yet been
retired. When that Pong fails permanently, the thread says a second
goodbye and overwrites the first failure's reason (Soul pass 4, PR4).
EndUnsendableSession now also returns when the session has already ended.

Two tests:
- The polling thread answers a Ping on a session already ended, and the
  Pong can never be sent. Exactly one goodbye goes out, and the first
  failure's reason stands. The hook admits the Ping after the session
  ended and before the peer is queued for retirement. The test kills the
  mutant that drops the Ended check.
- A failed send's goodbye is sent under the gate. A polling thread
  admitting a new Connect from the endpoint waits on the gate, so the old
  generation's goodbye never follows the new session's Accept. The test
  kills the mutant that sends the goodbye outside the gate.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 20:19:19 +02:00
Meta Vens
c996ae7892 Caching: a single-file refusal echoes a header only in its known shape
RequireSingleFileFormat echoed any header string. It now names one only in
the shape cultcache.store.v<digits> and otherwise gives its byte length.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 18:35:20 +02:00
Meta Vens
a44e189e0c C#: a peer's undecodable message ends that peer's session, never the poll
RudpCultNetSchemaServer decoded each schema frame outside its per-message
backstop, so a malformed payload (0xc1) or a well-formed message with an
unknown schemaVersion threw MessagePackSerializationException out of
PollAvailableAsync and PollOnceAsync. The drain aborted: a good peer's
request in the same drain went unserved, a consumer loop that did not
catch died, and the bad frame was already acknowledged while its peer
stayed connected.

Decoding now runs inside the backstop. A peer whose message cannot be
decoded or handled has its session ended: the transport's new
EndRefusedPeer sends the refusal goodbye under the gate, counts the drop
in PacketsDropped, drops that peer's frames still queued, forgets the
peer and raises PeerDisconnected. A session that already ended (replaced
by a new Connect, or ended by a send failure) gets no goodbye, since the
endpoint may belong to a new session. Other peers in the drain are still
served. Ending the session matches cultmesh-py's server, where one
peer's bad message ends that peer; runtime parity is the reason.

The log names the fault's type only and never its message, because the
decoder's message quotes the peer's input (the unknown schemaVersion).
The dispatch-backstop test now asserts that rule instead of the handler
message it used to require.

Tests, each failing on the pre-fix code: a malformed payload and an
unknown schemaVersion each leave the good peer served without Poll
throwing (also through PollOnceAsync); the bad peer's session ends,
counted and told; the log carries the type and not the canary value.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 17:23:40 +02:00
Meta Vens
3b9ffac2fe C#: a send failure's goodbye belongs to the generation that sent
Send ended an unsendable session after releasing SessionGate, and the
goodbye was built under the gate but sent outside it. If the polling
thread admitted a new Connect from the same endpoint in that window, the
ended generation's goodbye reached the new client: it saw Data, Accept,
Disconnect and believed itself disconnected while the listener held it
connected.

Every path that finds a permanent send failure now reads the session's
generation under the gate at the send, and EndUnsendableSession builds
and sends the goodbye under the gate only while that generation is
unchanged. The generation check replaces the UnsendableReason once-guard:
a second failure in the same generation finds it already ended.

The test orders the new Connect inside the send, before the fragment
that can never be sent, and asserts the new client hears no Disconnect
and stays connected on both sides. It fails on the pre-fix code
(Data, Accept, Disconnect) and kills the mutant that drops the check.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 17:23:30 +02:00
Meta Vens
2d76b8d1b6 Pin the reset before a refusal's goodbye (cultmesh-ts, cultmesh-py) and C#'s once-guard
The document servers' refusal tests sent an unreliable fragment, whose
sequence the session never records, so dropping the reset before the goodbye
survived. They now refuse a reliable fragment and check the goodbye does not
acknowledge it.

C#: a BeforeSend seam orders a caller's failing send between the polling
thread's ack and its send, so both threads end the same session; the peer
hears one goodbye.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 16:02:27 +02:00
Meta Vens
e8e8e5bac1 GameCult.Networking: a Connect that replaces a peer ends the old peer's session under its gate
A caller still holding the replaced peer (a schema handler awaiting work for
it) could send into the endpoint the new session owns: a goodbye after a
partial failure disconnected the new client, a fixed initial sequence
delivered the stale frame in place of the real one, and a drawn one stalled
the new session. The replaced session now ends under the SessionGate every
Send takes, so a stale Send throws and nothing of it leaves.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 15:54:33 +02:00
Meta Vens
2e94dc3aa3 Merge origin/main into hands/ack-cutD: Cut 3 flow window, RUDP client bind
Import lists in cultnet-ts index.ts and operation-service.ts and the
cultnet-py test block conflicted; both sides are kept.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 15:49:04 +02:00
Meta Vens
cce4d391b8 Ack Cut D D2 (C#): only the polling thread changes the peer set
A caller-directed Send that failed after a fragment left called
EndUnsendablePeer on the caller's thread, removing from _peers and raising
PeerDisconnected while the polling thread could be changing _peers too.
Send now ends the session and sends the goodbye under the peer's
SessionGate, and queues the peer; TryReceiveOnce and PollResends retire
queued peers before anything else. A peer a new Connect already replaced
is skipped, so a stale peer object cannot remove the peer that replaced it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 15:03:22 +02:00
Meta Vens
93f1a50895 Merge origin/main into hands/ack-cut3: Cut 3 and D Soul rulings, RUDP client bind
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 14:44:10 +02:00
Meta Vens
e6ddcdd6e1 GameCult.Mesh: an RUDP client binds by its endpoint, as the other runtimes do
CultMeshRudpSocketOptions.BindHost defaulted to 0.0.0.0 for servers and
clients alike (a58daa54, so clients could reach remote routes). That bound an
IPv4 socket for every client, so a client for an IPv6 endpoint could not send,
and a client for a loopback endpoint listened on every interface.

BindHost is now nullable and unset by default. Unset, a client binds loopback
for a loopback endpoint and the unspecified address of the endpoint's family
(0.0.0.0 or ::) otherwise, matching cultnet-rs, cultnet-ts, cultnet-py and
cultmesh-kotlin. A server keeps binding 0.0.0.0. An explicit BindHost wins for
both. The test that pinned the old default's value is replaced by tests of
what each endpoint binds.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 13:50:58 +02:00
Meta Vens
ac5c86033b Ack Cut D D2: pin the disconnect, the resend loop, the Python resend, ack and accept paths
The injected permanent failure now takes precedence over the injected transient
one, so a test can end a session on a peer that is also losing datagrams and
count exactly which datagrams were attempted afterwards. New tests: a hub
disconnect that can never be sent returns the error; a peer or session ended
in the resend loop is sent nothing more (Rust hub, document server, C#); the
goodbye reaches the peer; the Python server ends the session on a permanent
failure in a resend, an ack and an accept. The oversized-send test compares the
outstanding count with the one the hub's own unacknowledged Accept already
holds.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-09-30 12:25:04 +02:00
Meta Vens
6cf92329b6 Ack Cut D D2 (C#): a send that can never succeed throws from a caller-directed send and ends only that peer's session inside a poll
The listener swallowed every send failure as a counted loss. A send now splits
into permanent (MessageSize, InvalidArgument, AddressFamilyNotSupported: the
datagram can never be sent as built) and transient (everything else, still a
counted loss). SendSchema throws the SocketException and queues nothing, with
the packets it created withdrawn and their sequences reissued; a permanent
failure after an earlier fragment left ends the session. Inside a poll the
failure ends that peer's session, PeerDisconnected carries a reason naming the
error, and the poll is never failed. Tests pin each path, the classification,
BytesSent after a healthy send and a zero failure count.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-09-30 12:19:46 +02:00
Meta Vens
d7eacd1011 Ack Cut 3 F1: the 4 MiB flow bound counts acknowledged bytes above the lowest unacknowledged sequence
The bound summed only packets still awaiting an ack. Once frames above a lost
packet were acknowledged they stopped counting, so a receiver could be made to
hold more than 4 MiB behind one loss, and its hold buffer ended the session.
The sender now keeps the payload size of each acknowledged sequence above the
lowest pending one until the lowest advances past it, in Rust, TypeScript,
Python and C#. Tests per runtime: one lost packet, four acknowledged 1 MiB
frames, the fifth refused until the gap closes; and the floor moving to a new
lowest sequence.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-09-30 12:04:19 +02:00