[bug]: @sf-agentscript/[email protected] crashes at startup — variantMatch is not a function (stale @sf-agentscript/language pin) #73

Description

The published @sf-agentscript/lsp-server (2.2.30, currently latest) crashes
at startup with TypeError: ...variantMatch is not a function, before the LSP
connection is established. The root cause is a stale exact pin on the transitive
@sf-agentscript/language dependency, so no fresh install of the LSP server
works (same for @sf-agentscript/[email protected]).

Steps to Reproduce

1. npx --yes @sf-agentscript/lsp-server --stdio
   (or npm install -g @sf-agentscript/lsp-server and run agentscript-lsp --stdio)
2. The process throws immediately, before any LSP handshake.

Expected Behavior

The server starts, completes the LSP initialize handshake, and publishes
diagnostics.

Actual Behavior

Immediate crash at import:

.../@sf-agentscript/agentforce-dialect/dist/schema.js:217
    .variantMatch('byon', (value) => value.startsWith(BYON_SCHEMA_PREFIX), byonSubagentVariant);
     ^
TypeError: NamedBlock(...).describe(...).discriminant(...).variant(...).variantMatch is not a function

Cause: @sf-agentscript/[email protected] (published 2026-06-10)
uses the variantMatch schema-builder API but pins
@sf-agentscript/[email protected] (2026-06-01), which predates that API.
variantMatch first shipped in @sf-agentscript/[email protected] (2026-06-11,
one day after the dialect) — the dialect appears to have been built against
the unreleased workspace version of language and published with a stale exact
pin. Because every @sf-agentscript/* dependency is an exact pin, no fresh
install can resolve a working language.

Fix: republish agentforce-dialect / lsp / lsp-server against
@sf-agentscript/language >= 2.8.4 (current train is 2.19.3).

Environment

• Node.js version: 22.18.0
• pnpm version: n/a (reproduced with npm / npx)
• OS: Windows 11 (also reproduced in the node:22-bookworm container)
• Package & version: @sf-agentscript/lsp-server 2.2.30 (also @sf-agentscript/lsp 2.3.8)
• Browser (if applicable): n/a

Minimal Reproduction

The crash happens before any .agent source is read, so no snippet is required —
just running the server reproduces it:

npx --yes @sf-agentscript/lsp-server --stdio

Verified workaround — install with an npm overrides fix, after which the
server initializes and publishes diagnostics normally (verified against
Neovim's LSP client on Node 22):

{
  "dependencies": { "@sf-agentscript/lsp-server": "2.2.30" },
  "overrides": { "@sf-agentscript/language": "2.8.4" }
}

Additional Context

This is the same publish-pipeline defect already reported for a sibling package
in #71 (@sf-agentscript/agentforce unusable for the same reason, different
missing symbol), and the earlier #35 / #40 scope-rewrite incident. The
post-publish import smoke test proposed in #72 would have caught this too.