How do I use TypeScript 7's native LSP (tsgo) as Serena's TypeScript backend?

Question

I'm on Serena 0.1.4, Ubuntu 22.04, and want to use TypeScript 7's Go-based language server (tsgo --lsp, later tsc --lsp --stdio) instead of the Node.js typescript-language-server wrapper. The TypeScriptLanguageServer class doesn't support the ls_path config option, and its startup capability checks reject tsgo's LSP responses (textDocumentSync can be an object, triggerCharacters can be a superset). Is there a supported config option or a working workaround?

Originally asked on GitHub: https://github.com/oraios/serena/issues/1402

AgentArmor team · Accepted Answer

Status: the tracker marks this issue closed (COMPLETED), but the feature was never merged into Serena. The original PR adding `typescript_tsgo` was closed without comment by a maintainer, and as of October 2026 a new PR (#2178) is open, adding `typescript_tsgo` via the released TypeScript 7 command `tsc --lsp --stdio`.

Until that lands, the only approach shown working in the thread is a wrapper-plus-patch hack for the existing `typescript` backend. In `project.yml`:

```yaml
ls_specific_settings:
  typescript:
    ls_path: .serena/tsgo-lsp.sh
```

with `.serena/tsgo-lsp.sh`:

```sh
#!/bin/sh
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
exec "$SCRIPT_DIR/../node_modules/.bin/tsgo" --lsp "$@"
```

Then patch `solidlsp/language_servers/typescript_language_server.py` in the uv install to accept tsgo's initialize response: `textDocumentSync` may be an object with `change == 2` instead of the integer 2, and `completionProvider.triggerCharacters` may be a superset of `[".", '"', "'", "/", "@", "<"]`. The author had been using this for weeks; the annoyance is remembering to apply the patch daily since updates overwrite the uv cache.

For released TypeScript 7, one commenter notes `@typescript/native-preview` is no longer needed — the native LSP runs as `tsc --lsp --stdio`. PR #2178 follows that approach: Serena installs the package automatically and runs the existing TypeScript tests against both servers. General advice: the wrapper and patch target the dev-preview `tsgo --lsp`; check which command your TypeScript install provides before wiring this up.

AgentArmor team · Answer

**What @selbyk tried on GitHub** (Worked)

Set `ls_specific_settings.typescript.ls_path` to a wrapper script in project.yml that execs `tsgo --lsp "$@"`, and patched `solidlsp/language_servers/typescript_language_server.py` to accept tsgo's object-form textDocumentSync and superset trigger characters. The author used it for weeks, with the annoyance being remembering to re-apply the patch daily.

Source: https://github.com/oraios/serena/issues/1402#issuecomment-4344683249

AgentArmor team · Answer

**What @MischaPanch tried on GitHub** (Didn't work)

The original PR by @8SFXIM5 adding `typescript_tsgo` got an initial review but had failing tests and was later closed without comment by a maintainer.

Source: https://github.com/oraios/serena/issues/1402#issuecomment-4344704738

AgentArmor team · Answer

**What @Kiborgik tried on GitHub** (Outcome unclear)

A contributor opened PR #2178 adding `typescript_tsgo` using released TypeScript 7 (`tsc --lsp --stdio`), with Serena installing the package automatically and running existing tests against both servers. Not merged as of the thread.

Source: https://github.com/oraios/serena/issues/1402#issuecomment-6262721529

AgentArmor team · Answer

**What @Flimm tried on GitHub** (Outcome unclear)

A commenter noted that with TypeScript 7.0 released, `@typescript/native-preview` is no longer needed; you run `tsc --lsp --stdio` and stream input into it. Direction only, not tested in the thread.

Source: https://github.com/oraios/serena/issues/1402#issuecomment-4922110732

How do I use TypeScript 7's native LSP (tsgo) as Serena's TypeScript backend?

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How do I use TypeScript 7's native LSP (tsgo) as Serena's TypeScript backend?

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