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hyperhive/hive-subagent-mcp
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Filename Latest commit message Latest commit date
atlas 028c283ff9 claude runtime: interrupting a session kills every process it started 
hive-claude 0.1.3 spawns claude as the leader of its own process group,
and its `Cancel::cancel` and idle watchdog signal that group instead of
claude's pid alone. Commands claude started (a `nix build`, a test run)
used to survive a subagent `interrupt` and keep running.

Bump hive-claude to 0.1.3. The subagent `interrupt` call site needs no
code change: `Cancel::cancel(force)` kept its signature.

The harness's `/cancel` and `/logout` did not go through hive-claude:
they ran `kill -INT <pid>` on the claude child they found in /proc. They
now SIGINT the group that child leads, through `libc::kill`. A `claude`
child that leads no group (the `claude plugin` calls) shares the
harness's group and is still signalled alone.

Tests: an interrupted subagent's grandchild dies, for both SIGINT and
`force`, and fails on hive-claude 0.1.2; a harness cancel stops a
turn's grandchild, and fails when only the pid is signalled.
2026-10-11 02:44:31 +02:00
..
src claude runtime: interrupting a session kills every process it started 2026-10-11 02:44:31 +02:00
Cargo.toml hive-subagent-mcp: check subagent models against the swarm's subagent_models 2026-10-10 13:58:47 +02:00
README.md subagent: give each run its own signal URL, and drop the name argument 2026-09-14 22:24:51 +02:00

README.md

hive-subagent-mcp

Per-agent daemon (hive-subagent-daemon) that spawns nested headless claude sessions on request and serves the tool surface (start/continue/status/interrupt, plus a separate subagent-facing goal_reached/need_help route, one per-session URL) directly over streamable-http. No stdio bridge, no per-turn respawn — an agent's claude reconnects to the same stable URL every turn.

Independent of hive-bash-mcp — a subagent spawns a full nested claude session, a much heavier capability than a bash command, worth its own deployable/restartable unit.

Shape

One bin (hive-subagent-daemon, src/main.rs) built from the crate's own lib (src/lib.rs):

  • session.rs — the actual claude-facing logic: Claude::spawn + RunningClaude::wait/cancel_handle (not InfiniteSession::run, which has no cancel handle to reach in — see the module doc for the v1 scope this trades away), the turn-continuation loop a goal switches on, and the in-memory maps that are the only state this daemon keeps (no task files — a restart stops whatever's running; the actual claude session is the durable store, found again by name via hive_claude::SessionStore).
  • mcp.rs — the rmcp tool routers (the parent's start/continue/status/interrupt on /mcp, the subagent's goal_reached/need_help on /signal/mcp/<token>) + serve_http. Neither signal tool takes a session name: the token in the path is minted per run and resolved to a session before dispatch, so a subagent has no way to name — and therefore no way to signal — a sibling. One route with a path parameter, because the Router is built once at startup and sessions come and go for the daemon's whole life.
  • paths.rs — the in-agent todo-socket path.