Agent Lsp

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Code intelligence infrastructure for AI agents. 65 tools, 32 CI-verified languages, 24 agent workflows. Single Go binary.

curl -fsSL https://raw.githubusercontent.com/blackwell-systems/agent-lsp/main/install.sh | sh && agent-lsp init

What is it?

agent-lsp is an MCP server that orchestrates existing LSP servers (gopls, rust-analyzer, jdtls, etc.) into agent-native workflows.

Not an LSP server — it's an orchestration layer that manages language servers and exposes batch operations, speculative editing, and multi-step workflows via MCP tools.

Architecture:

• Language servers (gopls, rust-analyzer, etc.) → provide code intelligence
• agent-lsp (MCP server) → orchestrates workflows, maintains warm runtime
• AI agents → consume via MCP protocol

Why agent-lsp?

Persistent warm runtime
Language servers stay indexed across agent sessions. First session: indexes workspace (~10s for typical projects). Subsequent sessions: instant. No cold-start penalty on each request.

Batch operations
blast_radius → one call returns all exports + all callers (test vs non-test partitioned). Without orchestration: 20+ sequential LSP calls.

Speculative editing
simulate_edit → preview changes in memory, check diagnostic delta, apply or discard. Test edits before touching disk.

Workflow orchestration
24 skills that chain LSP operations into complete pipelines:

• /lsp-refactor → impact analysis → preview → apply → verify build → run tests
• /lsp-safe-edit → preview → diagnostic diff → apply if safe
• /lsp-verify → LSP diagnostics → build → test suite

Multi-language, single session
One agent-lsp process routes .go to gopls, .ts to tsserver, .py to pyright. No reconfiguration between projects. Session persists across files and repositories.

[!TIP] Token-optimized output: Tool responses encoded in GCF instead of JSON. 30-84% fewer tokens depending on tool (up to 92.7% with session dedup). 100% LLM comprehension on every frontier model, 91.2% on complex code graphs where JSON averages 54.1%. See below for measured savings per tool.

How the pieces fit together: LSP (Language Server Protocol) is how editors get code intelligence: completions, diagnostics, go-to-definition. MCP (Model Context Protocol) is the standard way AI tools like Claude Code discover and call external tools. agent-lsp bridges the two: language server intelligence, accessible to AI agents.

Use it when

• Building agentic code generation systems
• Automating refactors across large codebases
• CI tooling that needs programmatic code intelligence
• Any workflow where sequential LSP calls are too slow or complex

What agents say

We asked AI agents to evaluate agent-lsp across 10 coding tasks (find callers, rename safely, preview edits, detect dead code) and write an honest assessment. Four different models, four independent evaluations, same conclusion: