terror/just-lsp — A language server for just

Description and use

**Summary**
terror/just‑lsp is a Rust‑based language server that adds IDE‑style support (completion, diagnostics, go‑to‑definition, etc.) for the *just* task‑runner language. By providing a standard LSP interface, it lets teams share a single, reusable backend for just‑file tooling instead of rolling their own ad‑hoc parsers and validators.

**Value**

• **Infrastructure reuse:** One centrally‑maintained server can be used across all projects that employ *just*, eliminating duplicated parsing logic and configuration.
• **Faster API/service delivery:** Developers get immediate feedback while writing *just* scripts, reducing debugging time and helping teams ship backend services more quickly.
• **Standardized patterns:** The LSP enforces a common set of conventions for *just* files, making it easier to onboard new engineers and keep codebases consistent.

**Practical adoption path**

1. **Prototype integration:** Clone the repo, build the binary (cargo build --release), and point your editor’s LSP client to the executable.
2. **Manual validation:** Because the discovered metadata provides few integration hints, run the server against a representative set of existing justfiles and verify that diagnostics, completions, and hover information align with your team’s conventions.
3. **CI gating:** Add a lightweight check to your CI pipeline that starts the server and runs a small suite of LSP‑based tests (e.g., ensure expected completions for common tasks).
4. **Roll‑out:** Once the validation passes, distribute the binary (or a Docker image) to all developer workstations and configure the editor settings centrally (e.g., via a devcontainer or VS Code workspace).

**Production readiness**
The project sits at a **Medium** readiness level: it is actively maintained (last update 2026‑05‑12), has a modest community (≈ 289 ★, 21 forks), and works well for prototypes or internal tooling. Before using it in a production CI/CD pipeline, teams should perform the manual inspection step to confirm that the integration cost (build, runtime dependencies, and any required custom extensions) is acceptable, and put in place monitoring for the LSP process to catch any stability regressions. Once those checks are in place, terror/just‑lsp can be considered safe for internal services and, with further testing, for broader production use.

Problem

terror/just-lsp helps teams reuse service infrastructure instead of rebuilding common backend pieces.

Outcome

Medium: useful for prototypes or internal workflows, with dependency and maintenance checks before production.

Workflow

• ship API services faster
• reuse backend infrastructure
• standardize service patterns

Evidence

A language server for just

Source