<semantic> TypeScript Server Error (5.9.3) No Project

[NullVoxPopuli]

TypeScript version

5.9.3

System Info

❯ pnpm dlx envinfo --system --binaries --browsers
Progress: resolved 1, reused 0, downloaded 0, added 0
Packages: +1
+
Progress: resolved 1, reused 0, downloaded 1, added 1, done

  System:
    OS: macOS 26.2
    CPU: (16) arm64 Apple M4 Max
    Memory: 20.57 GB / 64.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 24.12.0 - 🏠/.proto/tools/node/24.12.0/bin/node
    npm: 11.6.2 - 🏠/.proto/tools/node/24.12.0/bin/npm
    pnpm: 10.27.0 - 🏠/.proto/tools/pnpm/10.27.0/shims/pnpm
    bun: 1.3.3 - 🏠/.proto/shims/bun
  Browsers:
    Chrome: 144.0.7559.97
    Firefox: 147.0.2
    Safari: 26.2

Steps to reproduce

open a project for the first time (doesn't happen in all projects, just the giant one at work -- and I can't reproduce the problem in small projects :( )

trigger the "rename" action -- other actions work ok.
after triggering "rename", I get this stack:

Error on prepareRename: <semantic> TypeScript Server Error (5.9.3)
No Project.

Error: No Project.
    at Object.ThrowNoProject (<.pnpm>/typescript@5.9.3/node_modules/typescript/lib/typescript.js:186170:11)
    at IpcIOSession.getProjects (<.pnpm>/typescript@5.9.3/node_modules/typescript/lib/typescript.js:195732:21)
    at IpcIOSession.getRenameLocations (<.pnpm>/typescript@5.9.3/node_modules/typescript/lib/typescript.js:195752:27)
    at rename (<.pnpm>/typescript@5.9.3/node_modules/typescript/lib/typescript.js:194219:43)
    at <.pnpm>/typescript@5.9.3/node_modules/typescript/lib/typescript.js:196832:15
    at IpcIOSession.executeWithRequestId (<.pnpm>/typescript@5.9.3/node_modules/typescript/lib/typescript.js:196821:14)
    at IpcIOSession.executeCommand (<.pnpm>/typescript@5.9.3/node_modules/typescript/lib/typescript.js:196830:29)
    at IpcIOSession.onMessage (<.pnpm>/typescript@5.9.3/node_modules/typescript/lib/typescript.js:196878:68)
    at process.<anonymous> (<.pnpm>/typescript@5.9.3/node_modules/typescript/lib/_tsserver.js:519:14)
    at process.emit (node:events:508:28)
    at emit (node:internal/child_process:949:14)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)

What is expected?

no error

What is actually happening?

the stack above