Every Typert Remote stream accepts client-to-Host items on the same
logical stream. A method declares the uplink item type in its return
type, RemoteStream<Out, In>, and reads the items through
this.ctx.invocation.uplink(); the invocation also carries the calling
Peer. Client generated methods return a handle that iterates the
downlink and exposes send/end/dispose for the uplink.
Address review: retention now has a single definition (retainedIds) shared by
the list-refresh sweep and the single-id prune, an already-engaged identity
skips the redundant row mutation, and the ledger documents why Host-asserted
running is recorded before any holder exists while the client-local acceptance
callback requires one.
The cold row's updatedAt is the later of the header's creation time and the cached last prompt; the fork's creation time is wall-clock and can trail the inherited prompt by a millisecond, so the restart test asserts the same maximum instead of the prompt time alone.
A real fork made through sessions.fork is checkpointed into the projection cache, the Context is disposed, and a Host booted over the same storage root serves the fork's title and list metadata from the header alone, as a kind: 'cached' block, without inspecting or opening the log.
The session-controller README, the per-session store JSDoc, and the projcache predecessor-recovery and durable-web-queue-recovery notes described one higher-seq-wins rule and the asOfSeq -1 title hint. They now state that higher-seq-wins applies among Host-sequenced values, that cached list blocks yield to the connected Session's baseline, and that the predecessor title carries its stored row's watermark under kind: 'cached'.
A `sequenced` list block merges key by key under higher-seq-wins like any Host-computed value, so a delayed control baseline at a lower cut can neither overwrite nor clear a newer live-session list value. Only a `cached` block goes through applyCached and yields to every sequenced write. The projection store's module docs describe the two row kinds.
SessionProjectionHints gains a required `kind`: `sequenced` when the Host's live registry computed the block for an attached Session, `cached` when a header-only listing viewed it from the persisted projection cache. `asOfSeq` stays the producer's own watermark in that space, so the cache read faces report the lowest served row seq again instead of the -1 sentinel. The two fields are independent: `kind` names the sequence space, `asOfSeq` the position in it.
ProjectionValueStore rows are either cached (viewed from the persisted checkpoint by the session list, no comparable seq) or sequenced (computed by the connected Host, seq comparable within the connection). Cached values fill empty keys only; every baseline discards cached rows before seeding, and every frame replaces them regardless of seq, so a connected Session's values always supersede list hints. The list response and api-session/added blocks write cached rows.
The projection cache read-only face (cachedSnapshot, cachedPredecessorTitle) now matches the lifecycle identity a header witnesses (formatVersion, createdAt, cwd, isSeeded) and serves its rows as a cached block with asOfSeq -1. The fold face (hydratePrepared, write, coldSnapshot) keeps the full identity including the inherited cut. The session list and @ completion drop their isSeeded guards, so forked sessions keep their cached title and list metadata across a Host restart; list-children keeps its body fallback.
Attachment reads and ZIP export previously inferred ownership from common
field names on arbitrary events. Opaque ignorable plugin payloads could
therefore cause storage reads, while declared compaction content was missed.
Select attachment-bearing fields by current built-in event type in both
readers. Read direct image and file blocks, including flat V4 tool results
and developer messages, without interpreting extra block fields. Leave
unknown payloads and malformed inbox entries opaque. The archive preserves
the complete logical log even when its payload does not authorize a read.
V4 validates title requests as one text block, so do not treat them as an
attachment carrier. Compaction keeps its declared ContentBlock fields for
valid custom producers; the basic producer's text-only output is documented.
Historical wrappers remain the adjacent converters' responsibility rather
than a second compatibility path in attachment readers.
Adapt the original policy change to master after V4 landed, retaining its
author credit and scope. Cover tool-result export explicitly, keep Team
fixtures free of invented message roles, and verify that denied carriers
never read storage. The 889 owning tests pass with 100% statement, branch,
function, and line coverage for both changed runtime files.
Co-authored-by: Tianyi Cui <[email protected]>
lsdsjy