deepseek-ai/deepseek-harness · error

lsp-stdio: server ids must be non-empty strings

Error message

lsp-stdio: server ids must be non-empty strings

What it means

Error "lsp-stdio: server ids must be non-empty strings" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/lsp/lsp-stdio/src/index.ts:143

 */
export async function apply(ctx: Context, config: Config): Promise<void> {
  const entries = Object.entries(config.servers)
  if (entries.length === 0) throw new Error('lsp-stdio: servers must contain at least one server')

  const setupAbort = new AbortController()
  const stopSetupCancellation = ctx.on('internal/plugin', (fiber) => {
    // An async plugin callback must observe its own disposal before Cordis can
    // run effect cleanup, because unload otherwise waits for this callback.
    if (fiber === ctx.fiber && fiber.uid === null) {
      setupAbort.abort(new Error('lsp-stdio setup disposed'))
    }
  })

  // Resolve every server-local setting before registration so a bad later command or bound cannot
  // publish an earlier provider. Registry-level mapping conflicts are rolled back below.
  const providers = await (async () => {
    const lookups = entries.map(async ([providerId, rawConfig]) => {
      if (providerId.trim() === '') throw new Error('lsp-stdio: server ids must be non-empty strings')
      const resolved = rawConfig as ResolvedServerConfig
      validateServerConfig(providerId, resolved)
      const executable = await ctx.subprocess.resolveExecutable(
        resolved.command,
        resolved.env,
        setupAbort.signal,
      )
      setupAbort.signal.throwIfAborted()
      return new LocalLspProvider(
        providerId,
        ctx.fs,
        resolved,
        executable,
        spec => ctx.subprocess.spawn(spec),
      )
    })
    try {
      return await Promise.all(lookups)

View on GitHub (pinned to b150a551b8)

Solutions

1. Give every server a non-empty string id.

When it happens

Trigger: Thrown at packages/lsp/lsp-stdio/src/index.ts:143 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/c64a1d8bc3a7d460. Report an issue: GitHub.