The operator decided on 2026-09-23 to port the live fly onto the session framework in full.
New contract legacy-gameboy-v1: the profile gameboy-legacy-fafb-v783-v1, the proof that the
legacy f64 frame clock equals the rational one, the step-by-step placement of step_frame in
lockstep-v1, the readout context (location allowed and declared), the channels decision, the
memory-image inspection and ROM AssetRef, the environment (one no-button setup frame, u8->f32
audio, DC blocker at the edge, gameboy-slots-v1), the pokered-macros-v1 executor as one object
with its task, the legacy-ratchet-rollback-v1 policy, the composition digest carrying decoder
and macro-channel configuration, legacy-transient-reset restore semantics, sugar admission with
a one-commit lag, and FLYSIM01 as format of record until RETIRE-01. PROF-02b is a stub.
Dated amendments, each citing the decision, where earlier text kept the legacy loop outside
lockstep or had no place for it: workers-v1 (telemetry, Initialize, executor, episode request
kind, admission, new section 7 extension methods), step-v1 (rollback edge, Phase B/C, clock,
episode policy, sugar lag), state-media-v1 (audio, memory-image retention, restore semantics,
format of record, section 7 ratchet), README section 4, implementation.md (AGENT-01 and ENV-01
unblocked), the MaleCNS backlog (FOUNDATION-02 split, RUNTIME-01 contract) and analysis (5.2,
5.4), and readout.md (where the location comes from).
take_events kept returning Option<EventBatchView> and defaulting through the
question-mark operator, so a batch missing a field read as end of stream and the
ConsumerEvents enum added in the previous round described nothing. It returns
Batch or Unreadable now, and a test publishes a batch with no droppedBefore,
asserts it is reported as unreadable naming the field, and asserts the next real
batch still reads.
The checkpoint-envelope-v1 amendment cites the rule that lets a required
manifest field land with envelopeVersion still 1 while no production file
exists.
The index an agent attested to at Agent.Initialize joins its compatibility
identity and its checkpoint manifest row, so a replacement fly that built
another graph -- the same dataset, the same neuron count, another index --
cannot install a checkpoint taken under the first one. It was accepted before,
because agent_compatibility digested a dataset digest recomputed from a free
function rather than what the worker attested to, and the restored composition
was then published under its predecessor's indexDigest.
The refusal names what the worker is, not just that two digests differ. Dated
amendment to checkpoint-envelope-v1's agents row; no wire type and no schema
text change, so the contract digest is unchanged.
A group restore re-establishes a committed boundary this epoch did not run a
transition into, so its snapshot carries no decision and no controls for any
agent, and a fresh epoch is a new compositionDigest, so the descriptor takes the
next revision rather than republishing revision 1 with different contents.
CommittedSnapshot's rule becomes: null at boundary 0 and at an installed
boundary, always together, and for every agent or none -- a snapshot where one
fly acted and another did not would be two boundaries in one value. Dated
amendment to publishing-v1 section 3, with the schema set, the fixtures and the
TypeScript package moved together and the digest regenerated.
An undeclared stimulus kind is refused before the model is touched, proved by an
injection through Agent.Commit rather than by a unit call, so the declaration a
descriptor publishes is the thing the worker enforces.
The publishing-v1 section 2 amendment now says in its own words that
Session.GetDescriptor and Session.GetSnapshot are internal and provisional names,
which the later public v2 step may rename or supersede.
Review follow-up on the checkpoint store.
A dropped reply channel and an expired caller budget were both reported as
ReplyLost. They are different facts -- the first means the write is over and its
outcome did not reach here, the second means the save is still going -- so they are
now separate outcomes, and the durable wait has its own budget rather than borrowing
the one that bounds a call to a participant. Both still leave durable metadata where
it was, and for both the resolution asks the store about the same checkpoint.
The writer's two bounds refuse at different moments and the comment claimed
otherwise: the outstanding-capture bound is taken before a capture is requested, and
the byte budget cannot be, because a capture's size is not known until it exists. The
byte check, the decision and the change to the byte total are now one critical
section, the peak is sampled after a superseded job's bytes are gone, and the writer's
own bookkeeping is over a type that holds only the outcomes a writer can produce.
The manifest's coordinator.eventWatermarks is {lastSourceStep, issued}; the fixture
illustrated {lastEventId, lastOrdinal}, and the illustration is what changed, because
an event id is derived from the epoch and cannot be compared across the restore that
gives the session a new one.
checkpoint-envelope-v1 section 3 also now says, under the same dated amendment, that
a required-manifest-field change must bump envelopeVersion once production files
exist: contractDigest is taken over the schema set and does not cover this manifest,
so the envelope version is the only thing that can carry such a change.
bus-conformance.md still listed the example_demo root count and
session_over_one_router as not fixed here. Both are fixed on main now, so
the rows say what each test does instead: the example waits for the
producer's hold release before reading the counts, with its printed
output unchanged, and the integration renderer is held until the
publisher's twentieth receipt has returned, so its coalescing is forced
and the assertions are order, freshness, acceptance under a stalled
spectator and the replacement accounting, with the before and after
counts.
The delivery check in that test compared (step, sequence) against
(step, step), whose first element can never fail. It compares sequence
against step.
STATE-01 over the FLYSESS1 envelope CONTRACT-01 specified.
fly-session gains a `state` module: the durable store with its generations, its
rotation and the commit order of checkpoint-envelope-v1 section 5, where the store
manifest rename is the durable commit point; a compatibility block whose comparison
names the identity that differs rather than one opaque digest; and a bounded writer
that owns its payload handles until the bytes are committed or the job fails.
The writer's queue slot is taken before the first State.Capture, so a saturated
writer refuses a capture rather than queueing it without bound, and the refusal is a
BUSY the stepping session survives. Capture and durability are two events: a capture
completes when an immutable capture exists, and only the store manifest rename moves
the durable mark. A lost save reply is an outcome, and the resolution asks the store
about the same checkpoint instead of saving again.
Both worker roles implement State.Capture, State.StageRestore and
State.ActivateRestore, with once-only restore tokens bound to checkpoint, scope,
payload and incarnation. A restore selects a complete compatible generation, imports
every payload as a fresh artifact, stages the group, validates the coordinator's own
ledgers, and only then activates; a failure anywhere leaves the fence closed and
records every participant that staged as one that must be replaced. The fence lifts
at Failed -> Restoring(k) -> Paused(k) and nowhere else.
The task and the action executor gain the capture/validate_restore/install_restore
interfaces workers-v1 section 4 lists, and the ledger can re-derive the event
identities it issued under another epoch, which is what lets a resumed run's
behaviour trace be compared with an uninterrupted one.
media: check_required_audio now takes the observation's provenance instead of
exempting boundary 0. A chunk is the audio of an interval, and the observation
ActivateRestore installs covers none.
checkpoint-envelope-v1 section 3 gains a dated amendment adding `environment` to the
manifest, the holder of the world's own payload, which the table named for every
other participant; `helperState`, which that table already listed, joins the
required-field set in Rust and TypeScript. The fixture was regenerated by the
existing example; the schema set and contractDigest are unchanged.
state-media-v1 section 5 gains a dated amendment for three readings this slice
enforces: the State RPCs' compatibilityDigest is the participant's, not the
manifest's composition-level block; a restored observation carries no audio chunk;
and a participant that staged into an abandoned install must be replaced.
publishing-v1 over the same bus: a declared delivery policy per topic, named
publication outcomes, the bounded event batch, application-owned state and cues,
a read-only descriptor query service and a fake multi-agent consumer.
The session publishes the contract types rather than an ad-hoc payload, so a
descriptor says what the workers attested to and a snapshot is checked against it
before it is published and again when it is read: every frame comes from the
boundary its declared delay implies, every handle is the artifact its reference
names, and an observer's refusal takes no world step and fences no epoch.
AgentInitializeResult gains graph (datasetDigest, indexDigest, neuronCount,
rateRoles, supportedStimuli), without which no AgentDescriptor field in
publishing-v1 section 3 had a source. Dated amendments to workers-v1 section 2,
publishing-v1 section 2 and state-media-v1 section 3.
session_over_one_router asserted that a latest subscriber must drop
snapshots. bus-v1 section 7 says a latest subscription replaces an
undelivered value; it lets a consumer miss values, it does not oblige it
to. Under contention the publisher was slow enough that the renderer kept
up, saw all twenty snapshots and the test failed on conforming behaviour:
16 of 40 runs beside four busy loops, and 9 of 20 whole-crate runs.
The renderer is now held until the publisher's completion is observed
rather than until a timer expires, so the coalescing is forced instead of
raced for: the subscription keeps the one delivery in flight and one
replaceable queued value, and the renderer receives snapshots 1 and 20 of
20. The assertions are the guarantees that hold -- what arrives is in
publication order, the last value is the latest published, the stalled
spectator never refuses a publication or drops out of the fan-out, and
every snapshot the renderer missed is counted as a replacement to the
publisher at admission and to the renderer on delivery, so nothing is
lost silently.
Three more tests in the crate asserted the same kind of race:
- latest_replay_is_ordered_ahead_of_a_racing_publish demanded the
non-coalesced outcome of a race section 7 allows either way ("bounded
mode preserves that order, while latest mode may coalesce it"). It now
puts one racing publication to a bounded and a latest subscription at
once: bounded must deliver the replay and then the publication, and the
latest branch is chosen by that publication's own replaced count.
- collection_waits_for_every_retained_owner, and the two disconnect
cleanup tests beside it, read the store directory for the unlink that
follows the registry update outside the router lock. They use
settle_files, like every other unlink check in the suite.
- The demo example printed a root count taken before the producer's own
release had reached the router, so the line the guide quotes was a
race. It waits for the release, the same way it already waits for
collection; the printed output is unchanged.
Nothing under flybus/src is touched: no routing defect was found. The
conformance rows for the credit/queue split, the replaced count, the
replay ordering and the latest spectator that cannot refuse a publication
now cite what each rewritten test actually varies.
Keep-both everywhere the two slices met. lib.rs takes both module sets.
AgentConfig keeps worker_threads and the sensor log; EnvironmentConfig
keeps worker_threads, the render delay and the render counter.
coordinator.rs keeps the two-stage resolution and its blame() beside the
media split of the Advance reply's attachments, and its imports take both.
harness.rs is main's launcher-based file with this slice's media
instrumentation re-applied on top.
The media instrumentation is shared memory, so it now follows the
launcher's own rule for the progress counter: sensor_log and renders
return None for a participant with a process of its own rather than a
misleading zero. The launcher carries the sensor log and the render
counter to a participant in this process and the render delay and the four
media faults on the command line to one in another process, where the
child builds its own log and counter.
The media path itself is mode-agnostic and is now tested as such: one
image per boundary, forwarded to every agent and published once, asserted
over the bus in all three execution modes, with the shared-memory
assertions made only where those participants live.
Review fixes for SESSION-02.
An expired caller deadline was becoming a failed epoch without the
ipc-v1 section 6 resolution. That procedure existed and was correct and
had exactly one caller, a test injection, so the deadline this slice
introduced bypassed it and a merely slow participant lost its epoch.
Deadlines is now the two-stage shape section 6 describes -- a probe,
then a bounded resolve budget and attempt count -- call_owned returns a
typed CallOutcome so an expiry is distinguishable from a refusal, and
Prepare, Commit, Advance and the lifecycle calls all query the same
request id against the same incarnation before the epoch can fail. This
is also step-v1 section 7's Advance row, which was imperative about it.
The coordinator peak-RSS column was measuring the measuring process.
VmHWM never falls and every row shared one process, so the column was
cumulative and the mode ranking reversed when the rows were reordered.
Each row now runs in a measure-row child of its own. The corrected
numbers say the opposite of what the first report claimed: the
coordinator's own peak is roughly flat across the modes and lowest in
process mode, and the cost of the split is the children.
workers-v1 section 2 bounded Agent.Initialize's workerThreads by
"within launcher allocation" and named no wire for it. Dated amendment:
HelloResult.limits gains workerThreads, the worker reports what its
launcher gave it, and the launcher refuses one that disagrees. The
schema set, the shared fixtures and the TypeScript package move
together; contractDigest changes, which ipc-v1 section 4 provides for.
Also: the stale-epoch row now reaches the stale-epoch path against a
live agent process and asserts exact codes on both halves; the
router-restart row asserts the handle drop it claimed; frames are
counted from the behaviour trace instead of calculated; the README says
which suites run over which transports; bootstrap is fence-guarded; the
shutdown reason is an Id rather than a silent fallback; and
agent_mutations returns None rather than zero where the counter lives
in another process.
Review round two.
A restored timeline refuses a declared stream with no recorded sample
position instead of resuming it at zero, which would have restarted the
episode's audio clock silently.
A declared stream that produces no chunk for a transition now fails the
step. The contract does not say a chunk must exist; this slice requires
one, because a silently missing chunk cannot be told from a lost one.
Boundary 0 is exempt: no interval precedes it.
The fresh-epoch discontinuity refusal is dropped rather than written into
the amendment. Only the restore direction is stated, and sections 6 and 7
both have a fresh timeline publishing a discontinuity after a recovery or
a reset, so refusing the flag at an origin contradicted them. The dated
amendment now says the requirement is one-directional.
A snapshot with an unreadable chunk, or one whose handle is not attached,
is now unreadable as a whole rather than quietly carrying less audio than
was published. ViewPipeline::is_bootstrap_repeat is removed.
New tests: a missing chunk fails the step, restored timelines need every
declared stream's position, and a 7 Hz world's seven chunks sum to exactly
one second of 48 kHz samples. The bus-conformance reconnect row also cites
the test that actually replaces an incarnation.
Two readings of the section that are now checked rather than assumed: the
bootstrap window is exactly the boundaries where max(0, boundary - delay)
is zero and its repeated O[0] is the same artifact, and a chunk that
continues the previous one exactly cannot claim a discontinuity, which is
what keeps the restore rule checkable instead of advisory.
caller_disconnect_cleanup_works_before_and_after_consumption failed 37 times
in 240 runs under load: the reply raced the router's own teardown. op_reply
reports routed:false only once disconnect has marked the call detached, and
the router runs that when its connection task reads EOF, while Client::close
waits for this client's reader only. The reply could therefore reach a
connection that was still closing and be routed. Nothing escaped -- teardown
releases those roots -- but the flag was read one step early.
The test now settles on the caller's connection being gone before asserting
the section 6 sentence, which is the poll the rest of the file already uses.
360 runs after the fix, 0 failures.
bus-conformance.md records the mechanism, the counts and the two other
intermittent failures seen in the same sweep, which are left to the bus slice.
Two fixes from the independent review of f043cd7.
RationalNs::checked_add cross-multiplied into u128 and then added without a check. Each
product fits, but their sum does not: two reduced fractions near the U64 maximum add to about
2^129, which panics in debug and wraps in release, after which the reduction returns a
confidently wrong rational. Every multiplication and the addition now go through a checked
path, as ipc-v1 section 2 requires, with a fixture row and a test that reaches the overflow
rather than the "does not fit U64" reduction limit.
The schema-set test checked fourteen hardcoded type names, so a new payload type could have
shipped outside contractDigest. It now iterates the readers own list, all fifty of them.
Also amends ipc-v1 section 5, dated: Worker.Acknowledge carries req-<U64> request ids, not
arbitrary Ids, because the serial watermark rule in that same section cannot reject reuse
after acknowledgment unless the acknowledged id carries its serial.
Review found two Memory-only tests behind a README claim that every integration test runs
twice. Both are now generated by both_transports!: the one-agent composition, and the
old-epoch refusal, which is one of the three tests the old-worker-replies row cites. The
README says which single test walks both transports inside itself instead, because it
compares their traces against each other.
step-v1 section 2 gains the mid-step pause line and a dated amendment saying why it is not
a new edge: a pause requested during a transition is the ordinary
Committing(k) -> Ready(k+1) edge followed by Ready(k+1) -> Paused(k+1), because section 6
requires the transition to finish first, so the only boundary such a pause can land on is
the one the transition just committed.
Two specifications CONTRACT-01 owes the slices that cannot be built without them.
seed-derivation-v1: the versioned derivation of independent per-agent seeds from a recorded
master seed and stable agent ids, the exact hashed material, the lane rule that keeps a seed
away from zero (the pinned kernel RNG is an xorshift, whose state must not be zero), the
properties a composition may rely on, and the test vectors both languages reproduce.
checkpoint-envelope-v1: the exact byte layout of the new envelope per state-media-v1 section
4, with the header, canonical-JSON manifest, 112-byte payload table entries, eight-byte
aligned payloads and the digest footer; the manifest field set; what a reader enforces and in
what order; and the durable commit sequence of section 6, whose commit point is the store
manifest rename. FLYSIM01 is unchanged, refused at the magic, and stays separately readable.
Both are specifications with fixtures, not the store: generations, rotation, the capture
queue and the restore flow remain STATE-01.
An independent review of 4f44894 accepted the audit with two required evidence
changes, neither of which needed a code change.
"Classification is not a topic-name heuristic" cited a lane-order test that
never varies a topic name. The row is now conforms-by-construction, naming the
four scheduler functions that read only the queue an item sits in, and
a_topic_named_like_a_notice_is_still_classified_as_topic_data publishes on
topics called call.failed, route.removed and subscription.closed and asserts
each arrives as a topic.message delivery with its payload intact.
"A latest subscriber never causes BACKPRESSURE" cited a bounded-mode test and
the ignored measurement. a_latest_subscriber_never_refuses_a_publication floods
one unconsumed latest slot with 100 publications of 60 KB, six times the
per-client bounded byte pool, and asserts none is refused, 98 coalesce, the
queue stays at one and the credit never comes back. That row also underwrites
the byte-budget deviation and the first contradiction.
Both tests run over both transports.
The coordinator resolved both contradictions in the spec rather than the code,
so bus-v1 carries them as dated amendments with one line of reason each: the
section 9 table row becomes "Per-client ordinary bounded queued envelope bytes"
with a new "Latest subscription slots | subscriptions x 64 KiB" row, and the
section 2 sketch drops the budget argument and shows the deadline at the caller.
With the amended wording the byte-budget row conforms, so the report's counts
are 178 / 9 / 1 fixed / 7, and the crate README's differences 4 and 8 say they
no longer differ.
bus-conformance.md audits the flybus crate against bus-v1 sections 2 to 11, one
row per normative sentence: requirement, status, code location, the test that
proves it. 195 rows, 177 conforming, 10 deviating with the sentence that allows
each, 1 must-fix (the teardown starvation, fixed in this branch) and 7 not
implemented with an owner named. It also maps every BUS-01/02/03 acceptance
bullet to its test, reconciles all ten of the crate's own differences from the
draft, records the frame measurement with the reasons it is not a capacity
claim, and lists the two contradictions inside the draft it will not guess at:
the per-client queued byte budget against the latest-mode guarantee, and
section 2's call budget against section 6's client-owned deadline. Neither
changed any code.
bus-v1 gains section 12: dated amendments for the three error codes the
implementation needs and the draft left unnamed (CONFLICT, NO_TOPIC,
ARTIFACT_MISMATCH), one line of reason each, and for the one operation it adds
(rpc.responder.release), which is how bounded call correlation ends when a
handler keeps reply authority after releasing the request delivery. Section 9's
error list is inclusive, and section 4 already provides for a digest change.
The crate README points at the report, carries the new measurement summary in
place of the old numbers, and describes the two new test files; the design index
and the flybus index point at the report too.
