feat(coding-agent): surfaced lazy LSP servers as available in welcome screen

- Added "available" status so recognized servers show under lazy mode without warmup.
- Rendered full welcome box as pre-TUI splash with fixed slot heights to avoid layout shift.
- Reported lazy servers as available in /status instead of omitting the section.
This commit is contained in:
can1357
2026-06-10 07:21:57 +02:00
parent a25d521cab
commit b0fec42218
10 changed files with 238 additions and 40 deletions
+1 -1
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@@ -320,7 +320,7 @@ Use `setToolUIContext(...)` only if your embedder provides UI capabilities that
- `options.hasUI === true` (interactive TUI), **and**
- the `lsp.lazy` setting is disabled (it defaults to `true`).
With `lsp.lazy` enabled — the default — no language servers are launched at startup at all; each server cold-starts on first use, i.e. when the agent invokes the `lsp` tool or an edit/write touches a file whose extension matches the server's `fileTypes`. Print / script / RPC / ACP invocations (`hasUI=false`) skip the warmup regardless of the setting: they don't render the warmup status indicator and typically finish before the language servers would stabilize, so warming them just spends CPU parsing big `initialize` responses concurrently with the LLM stream consumer and jitters perceived latency. Tools that actually need an LSP server still spin one up on demand through `getOrCreateClient()` — only the _startup_ warmup is skipped. The returned `lspServers` field in `CreateAgentSessionResult` is therefore `undefined` (not an empty array) whenever the warmup branch was bypassed.
With `lsp.lazy` enabled — the default — no language servers are launched at startup at all; each server cold-starts on first use, i.e. when the agent invokes the `lsp` tool or an edit/write touches a file whose extension matches the server's `fileTypes`. Print / script / RPC / ACP invocations (`hasUI=false`) skip the warmup regardless of the setting: they don't render the warmup status indicator and typically finish before the language servers would stabilize, so warming them just spends CPU parsing big `initialize` responses concurrently with the LLM stream consumer and jitters perceived latency. Tools that actually need an LSP server still spin one up on demand through `getOrCreateClient()` — only the _startup_ warmup is skipped. The returned `lspServers` field in `CreateAgentSessionResult` is still populated for UI sessions in lazy mode — recognized servers are discovered (no processes spawned) and reported with status `"available"` so the welcome screen and `/status` can list them; it is `undefined` only when `enableLsp === false` or `hasUI === false`.
## Minimal controlled embed example