Changelog

The complete version history lives in the CHANGELOG.md file at the repository root. This page points to that file and names the most recent notable changes. The changelog records what has shipped; planned work is described separately on the Roadmap.

This page is for anyone checking what changed between versions.

Where the History Lives

The repository CHANGELOG.md file documents every notable change by version, including breaking changes and additions. Read it there rather than here so the history stays in one place alongside the source.

Most Recent Notable Changes

4.4.0 (2026-07-30): Indexing becomes a repository-owned job with progress, cancellation, and storage reporting, and it starts at the syntax tier; fuse index --semantic is the explicit request for compiler analysis. fuse index status, fuse index cancel, and fuse index clean expose that lifecycle, and fuse mcp doctor reports the running binary, client registration, daemon protocol, and active job. Inventory now reads Git blob ids, generated files keep declarations without bodies, and completed jobs truncate the write-ahead log. The reduction cache moves into bounded process memory, so Fuse no longer creates fuse-cache.db. Existing indexes rebuild for the new extraction contract.

4.3.0 (2026-07-16): Workspace-scoped MCP operations now resolve to the nearest Git repository root, refuse folders outside a repository, and validate warm indexes against a complete inventory before serving reads. The release also separates Fuse executable installation from MCP registration, generated agent guidance, and Claude Code hooks.

4.2.1 (2026-07-16): fuse mcp install adds native project and user configuration for OpenCode, Kilo Code, Codex, and Grok Build, bringing the supported client set to seven. --rules now installs task-specific guidance from the same source as the MCP server instructions, writes rules only after successful registration, and describes the boundaries of checks, refactors, focused tests, and reviews. The README and documentation site now lead with persistent .NET discovery and compiler verification, with a new supporting article and refreshed social cards.

4.2.0 (2026-07-14): MCP serving defaults to one shared daemon per repository with eager warm-on-start indexing, live incremental updates, and a bounded syntax-first cold path. Repeated compiler operations can reuse a held Roslyn solution or pooled build-capture worker. The release also adds the semantic-language provider seam, focused index-store components, one shared scoping model, a unified API-surface reference, and explicit degraded-state reporting. Existing indexes rebuild when the new extraction contract requires it; older capture bundles must be re-captured.

4.1.0 (2026-07-14): Derived KV cache moves to .fuse/fuse-cache.db so corruption recovery cannot wipe the semantic index; FTS unavailability is surfaced and fuse_find kind=task refuses honestly; host RPC binds to the served root; MCP file paths are workspace-confined; opt-in metrics via FUSE_METRICS=1; performance docs aligned to recorded benchmark JSON; brand icon on NuGet, MCP Registry, WinGet, and the site; centered landing hero and shared site footer.

4.0.1 (2026-07-13): fuse mcp install --rules adds .fuse/ to .gitignore at project scope; docs cover any MCP-compatible client and clarify that indexing happens on the first MCP read; consumer copy and the landing hero are retuned for a technical audience; diagram rendering on the site is fixed.

4.0.0 is the first public release. Its default MCP path uses the persistent store; the live resident-compilation path remains opt-in with FUSE_RESIDENT=1. Fuse verifies proposed edits (fuse_check), computes blast radius (fuse_impact), stages compiler-executed refactors (fuse_refactor), runs covering tests (fuse_test), and resolves typed .NET wiring (fuse_find).

The MCP server exposes a loop-shaped surface of eight tools (fuse_workspace, fuse_find, fuse_context, fuse_impact, fuse_check, fuse_test, fuse_refactor, fuse_review) plus fuse_reduce as the one out-of-loop utility, alongside playbook prompts and addressable resources. Scoped, reduced context and a deterministic lexical retrieval channel are the supporting machinery that feed those answers.

The persistent index is a single SQLite database at .fuse/fuse.db (WAL mode), built through MSBuild and Roslyn with a syntax-only fallback and re-indexed incrementally per changed file. See Store internals and Operator guide.

The benchmark source is isolated in Fuse.Benchmarks.slnx; the recorded numbers and figure live under tests/benchmarks/results. The packaged Fuse 4.4 tool does not include an evaluation command. See Benchmarks.

Fuse ships under the Apache License, Version 2.0. The Fuse .NET global tool is framework-dependent and requires a compatible .NET runtime. Runtime-specific release archives and installer downloads are self-contained and bundle the runtime. Install paths are documented under Install.

What This Does Not Cover

This page does not reproduce the version history. The repository CHANGELOG.md file holds it. Planned and unshipped work is on the Roadmap, not in the changelog.

Next

Read the Roadmap for the planned direction, or Contributing to build a change that would appear in a future entry.