Serena
Last tested 2026-10-22
Score 95/100 · Last tested 2026-10-22 · Version tested 2.1.0 · Package serena-agent · Repo oraios/serena
Summary: Serena completed an MCP handshake without credentials and exposed 3 tools.
Test results
| Test | Result | Points | Evidence |
|---|---|---|---|
| install | pass | 20 | uv pip install serena-agent (Python venv, Linux) succeeded in 0s. |
| handshake | pass | 30 | MCP initialize + tools/list over stdio succeeded with no credentials; 3 tools listed in 2.1s. |
| maintenance | pass | 25 | Repo pushed 1 days before test; 30,590 GitHub stars. |
| docs | partial | 10 | README over 3,000 chars; install instructions present. Automated check of the package's own README (PyPI long_description (package README)). |
| license | pass | 10 | GPL-3.0-or-later (OSI-approved). |
Local-model readiness
Schema context cost: ~763 tokens for 3 tools (3,477 bytes) · about 9% of an 8k context. Method: tiktoken cl100k_base over compact JSON of name+description+inputSchema (approximate).
Small-model friendly (schema heuristic, not a model result): medium.
Small-model task runs: Not yet tested.
Not tested
We did not test behavior with real credentials, security, or performance under load. These are planned; see methodology.
Tools listed
activate_project, initial_instructions, serena_repl
Config used in our test
{
"mcpServers": {
"serena": {
"command": "uvx",
"args": [
"serena-agent",
"start-mcp-server"
]
}
}
}FAQ
Is Serena deprecated?
No. serena-agent was not deprecated or archived when we last tested it on 2026-10-22.
What replaces Serena?
Nothing; Serena is not deprecated as of 2026-10-22.
Does Serena need an API key?
No. It completed an MCP handshake with no credentials and listed 3 tools.
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