---
title: "Release 2026-09-05 - Changelog"
url: "https://nsta1.github.io/Orleans.Lattice/changelog/2026-09-05.html"
source: "https://github.com/NSTA1/Orleans.Lattice/blob/release/9.9/CHANGELOG.md?plain=1#L1177-L1186"
documents: "Orleans.Lattice 9.9.0 (release line 9.9)"
built: "2026-10-04"
all-pages: "https://nsta1.github.io/Orleans.Lattice/llms.txt"
---
# Release 2026-09-05

Part of the [changelog](../CHANGELOG.md).

Coordinated family minor release - every published package outside the Explorer sub-family advances in lockstep to `9.6.0`. The headline is the shard-root contention series, now bounded end to end: every leaf-chain walk that could hold a deliberately non-reentrant shard root for the length of a chain is now bounded by the work it does rather than by the output it collects, resumes by key rather than by leaf grain id so a leaf split or reclaimed between batches cannot silently truncate a sweep, and sits under a hard end-to-end stall ceiling for the prologue and descent phases a cooperative budget structurally cannot reach - with the handful of walks that must stay atomic now recording why at each site and warning when they hold a shard past a threshold. Alongside it: a broad hot-path allocation and hash-probe trimming pass across the view-maintainer drain, slot routing, reshard slot accounting, the tenancy merge and the CRDT delta combine; a set of delimiter-aliasing fixes that make the caller-identity, projection-version and secret-set signatures injective; a WAL materialiser pin store that no longer rewrites every co-routed leaf on each flush, now bucketed and observable in the saturation signal; and the documentation corpus is now published as a browsable website.

One package debuts in this line, entering at the family version `9.6.0`: `Orleans.Lattice.Storage.File`, a durable local-disk write-ahead-log backend - an append-and-fsync log per shard with crash-safe reconciliation and background compaction that rewrites the log to reclaim trimmed space - intended for single-node and containerized deployments.

**The Explorer sub-family remains deliberately held back at `9.4.0` / `9.4.1` and does not participate in this lockstep**, for the same reason it was held back at `9.5.0`: the console rewrite ([#1790](https://github.com/NSTA1/Orleans.Lattice/issues/1790)) removes public types from the published `Orleans.Lattice.Explorer.Core` and would require minting thirteen new plugin package ids, so the whole sub-family ships together in the next major instead. Its entries remain under `## Unreleased`. Because no shipping package references an Explorer project, holding it back leaves no unresolvable dependency.

Three further companion packages remain **not yet published to NuGet** (build from source today): `Orleans.Lattice.Vector`, `Orleans.Lattice.Api.Mcp.RepoContext`, and `Orleans.Lattice.Api.Mcp.RepoContext.Replication`.

## Releases

- [Added to Changed](../changelog/2026-09-05-1.md)
- [Fixed](../changelog/2026-09-05-2.md)

Newer release: [Release 2026-09-07](../changelog/2026-09-07.md). Older release: [Release 2026-09-05: Added to Changed](../changelog/2026-09-05-1.md). Contents: [Changelog](../CHANGELOG.md).