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Local Dev Serve Troubleshooting

local-dev-serve-troubleshooting

Use this to run and debug the UI + server locally (Vite dev server, `lotar serve`, ports, SSE).

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SKILL.md

Full skill instructions

Common local dev setups

UI fast loop (Vite dev server)

  • Start UI:

    • npm run dev

  • In another terminal, start the Rust server:

    • cargo run -- serve --port 8080

Notes:

  • lotar serve port must be set with --port (the short -p is reserved for the global --project flag).
    • Correct: lotar serve --port 9000
    • Also accepted: lotar serve 9000 (positional port; kept for backward compatibility)
    • Incorrect (sets project, not port): lotar serve -p 9000
    • See: docs/​help/​serve.md

Production-like UI (embedded/​static bundle)

  • Build web assets:
    • npm run build:web
  • Build the binary:
    • cargo build --release
  • Run:
    • ./​target/​release/​lotar serve --port 8080

Debugging tips

  • If the UI isn’t updating, confirm SSE is connected (GET /​api/​events). See docs/​help/​sse.md.
  • If you’re working on REST handlers, use docs/​help/​api-quick-reference.md and keep docs/​openapi.json in sync for contract changes.
  • When chasing server behavior, enable logs:
    • RUST_LOG=debug cargo run -- serve --port 8080

Safety

  • Treat .env* and local config as sensitive; don’t paste secrets/​PII into logs/​issues.

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