claude-subagent-mcp

MCP server that gives an agent structured and complete views into a Claude Code agent's .jsonl log without reading the raw file. It speaks MCP 2026-07-28 over stdio through mcp==2.0.0.

Tools

• get_last_status(path, count, after_line=0) returns the last count assistant lines carrying visible text blocks and includes all text blocks of each returned line.
• get_last_tools(path, count, after_line=0) returns the last count assistant lines carrying tool calls with name and input but without results and includes all tool calls of each returned line.

count is applied after filtering, so exactly count qualifying lines are returned whenever that many exist. after_line is a lower bound on raw line numbers and only lines strictly greater than it are considered. Pass the highest line already seen as after_line to suppress repeats. Returned line values are raw file line numbers and therefore contain gaps. An incomplete trailing line is ignored. Any other line that does not parse makes the tool report a format error.

Install into Claude Code

claude mcp add --scope user claude-subagent-log -- uvx --from git+https://github.com/chrisliebaer/claude-subagent-mcp claude-subagent-mcp

Pin a tag or commit with @<ref> behind the repository URL to keep the server from changing under an agent. For a local checkout use uv --directory <checkout> run claude-subagent-mcp as the command instead.

Development

uv run pytest
uv run ruff check . && uv run ruff format --check .
uv run mypy src tests