53 lines
2.1 KiB
Markdown
53 lines
2.1 KiB
Markdown
# Bash execution tools
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Background shell execution via `hive-bash-mcp`. Tools land as
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`mcp__bash__<tool>` (the MCP server name is `bash`, not `hyperhive`).
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Available on every agent unconditionally — `harness-base.nix` always
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injects bash into `hyperhive.extraMcpServers` (with `allowedTools =
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["*"]`), so `mcp__bash__*` is in `--allowedTools` for every claude
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invocation regardless of tool groups.
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## Tools
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### `run(cmd, timeout_secs?)`
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Submit a shell command for background execution (`sh -c <cmd>`).
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Returns a task ID immediately; the command runs asynchronously in a
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harness-managed tokio task. Stdout and stderr stream to
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`harness/bash-tasks/<id>.{out,err}`. When the task completes (or
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times out, or the process errors), the harness wakes the agent with a
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summary body — handle on a future turn. Optional `timeout_secs`: pass
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a value for a deadline, or omit for no timeout (runs until natural exit).
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Exposed as `mcp__bash__run`.
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### `status(id)`
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Poll the status of a task submitted with `run`. Returns:
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- `status` — `pending` / `running` / `done` / `timed_out` / `interrupted`
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- `exit_code` — set when done
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- run duration
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- last 4 KiB of stdout and stderr (full output in the `.out` / `.err` files)
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Tasks marked `interrupted` had their process killed by a harness
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restart; a best-effort wake was still sent so the agent is not
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silently blocked.
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Exposed as `mcp__bash__status`.
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## Namespace note
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`run` and `status` live in the `bash` MCP server, not `hyperhive`. So
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the tool names in claude are `mcp__bash__run` and `mcp__bash__status`.
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The `Bash` built-in tool is blocked — all shell execution goes through
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this structured path so tasks get task-id tracking and structured output.
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## Relationship to the `execution` tool group
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`ToolGroup::Execution` exists and appears in `AGENT_DEFAULT`, but its
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`tools()` returns `["run", "status"]` which the harness expands to
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`mcp__hyperhive__run` / `mcp__hyperhive__status` — tools that don't
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exist in the hyperhive MCP server (dead entries). Removing `execution`
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from an agent's groups has no effect on bash availability. Bash is
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registered separately via the `extraMcpServers` path described above.
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