@okfit/lsp

Language Server Protocol server for okfit. Publishes background diagnostics for an Open Knowledge Format bundle into any LSP client, Claude Code included.

Part of the okfit kit. Most users want @okfit/plugin, which pulls this package in automatically and launches this server through the Claude Code plugin's lspServers.okfit entry.

What it is

@okfit/lsp speaks the Language Server Protocol over stdio for one or more discovered OKF bundles. The .md binding is the client's own registration (the Claude Code plugin manifest's extensionToLanguage); this server answers for any document under a discovered bundle root. It discovers a bundle per workspace folder the same way the CLI and MCP server do, and publishes okfit validate's diagnostics as documents open, change, save, or close. It writes nothing to the bundle on its own -- every edit it computes (setting a concept's status, appending a verified entry) is sent to the client as a workspace/applyEdit request, never written directly, so the client remains the one thing that ever touches disk.

Launching it

Most users never invoke this directly — the Claude Code plugin's bin/start-lsp.sh loader resolves the project's own node_modules/.bin/okfit-lsp and falls back to npx --yes @okfit/lsp when it is not installed. To run it directly, the package's own bin is okfit-lsp --stdio; --stdio is accepted and silently ignored, since streams are always stdin/stdout. --node-ipc, --socket, and --pipe are not supported. --clientProcessId=<pid> is accepted, and the server still exits on exit. The server's own signal that the client has gone is its input stream closing; the underlying vscode-languageserver library separately polls that process and exits with code 1 if it disappears first.

Publishing behaviour

• didOpen/didSave trigger a full revalidate; didChange/didClose trigger a cheaper edit-tier revalidate.
• The server registers no file watchers. When a client sends workspace/didChangeWatchedFiles itself, a change triggers a full revalidate on every live session. A config discovery file is the exception: it drops that folder's session, and nothing is republished until the next document event. Claude Code sends no watched-file events, so a config edit during a Claude Code session needs a session restart to take effect.
• A folder whose config fails to load is logged once and retried on the next didOpen or didSave under it, so fixing the config and saving a document recovers it.
• Exactly one textDocument/publishDiagnostics per file whose diagnostic set changed: an unchanged file is not republished, an emptied file publishes [], and a file not open in the editor still publishes when its diagnostics change.
• A bundle-level diagnostic publishes against the bundle root's index.md.
• A non-file: URI, and any document outside every discovered bundle root, is ignored.
• Diagnostics for several files can arrive together in one client notification batch; in Claude Code that batch reaches the model's context on the next Edit or Write tool call, not immediately.

Custom methods

Two okfit/-prefixed extensions, for editor front ends (the VS Code extension's concept explorer); neither is part of the LSP standard, and the LSP specification reserves $/ for its own extensions, leaving vendor prefixes to implementations.

• okfit/concepts (request, params {}) warms up every workspace folder that has never been resolved and runs a first revalidate for any bundle that has never loaded -- once per bundle root per session; a root whose bundle still fails to load after that first warm-up is not re-scheduled by a later request, only by a rebuild (a config fix, or the root's last workspace folder going away and a new one arriving) -- then answers with every live workspace folder's loaded bundle as { bundles: [{ root, rootUri, profile, concepts: [{ id, uri, title, type, status, tier, integrity, stale }] }] }: status is "draft" | "stable" | "deprecated" | undefined (absent when the frontmatter has none), stale is computed against the request time, and a bundle that still failed to load (no config, or one that failed) contributes no bundle entry.
• okfit/bundleChanged (notification, params { rootUri, reason: "revalidated" | "dropped" }) is sent after every revalidate of a bundle root's diagnostics and after that root's session is dropped, so a client knows when to re-fetch okfit/concepts. The server advertises support with experimental: { okfitConcepts: true } in initialize's result.

Commands

workspace/executeCommand (the server advertises executeCommandProvider.commands in initialize's result) answers four okfit command ids. Arguments are ExecuteCommandParams.arguments, an array positional by index; a wrong shape fails naming what was expected. The ids sit under okfit.lsp. so they never collide with a client extension's own command ids: vscode-languageclient registers every advertised id as an editor command, and a duplicate stops the client from starting.

• okfit.lsp.setStatus -- args [uri, status] (status one of "draft" | "stable" | "deprecated"). Computes the TextEdit that sets the concept at uri's top-level status, sends it to the client with workspace/applyEdit, and answers the client's own ApplyWorkspaceEditResult verbatim.
• okfit.lsp.markVerified -- args [uri]. Computes the TextEdit that appends a verified entry (the resolved git identity, Derivation.generatedBy) to the concept at uri, sends it the same way, and answers the client's result. Fails when the concept is a draft, already verified by that actor, or no actor resolves.
• okfit.lsp.verifyAndMarkStable -- args [uri]. For a draft concept, computes the edits that set status: stable and append a verified entry in one write (what okfit verify --stable does), and sends them the same way. Fails for a concept that is not a draft, one already verified by that actor, or when no actor resolves.
• okfit.lsp.revalidate -- args [rootUri?], or no arguments at all. Schedules a full revalidate (republishing diagnostics and sending okfit/bundleChanged) on the named bundle root, or on every live session when the argument is omitted, and answers { roots: [rootUri, ...] } with the root URIs it revalidated -- { roots: [] } for a root no live session resolves to.

Both edit commands, and the code actions, compute their edit against the document's current editor text (or the file on disk when it is not open). The commands send it as a versioned documentChanges entry over workspace/applyEdit, so a client whose buffer has changed since refuses the edit rather than applying it at stale offsets. A code action's edit is not versioned on the client side -- vscode-languageclient and VS Code both drop the version when applying a code action -- so it stays safe only because it is computed from the current buffer at request time, not because a stale one is refused.

Hover on a concept shows its integrity (current, drifted or none), inlay hints append · drifted to a drifted concept's hint, and a verified-drift diagnostic carries a preferred Re-verify as <actor> quick fix. okfit/concepts entries carry tier and integrity beside status.

Status

Diagnostics, navigation, hover, code actions and commands, shipped through phase 5 of the LSP roadmap; see the project's own okf/roadmaps/lsp-server-and-vscode-extension.md for the full plan.

License

MIT