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feat(kanban): add max_in_progress config to cap concurrent running tasks

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Salvages #22981 by @SimbaKingjoe. Adds 'kanban.max_in_progress' config
that caps simultaneously running tasks. When the board already has N
running, dispatcher skips spawning so slow workers (local LLMs,
resource-constrained hosts) don't pile up and time out.

Threads through dispatch_once(max_in_progress=) and gateway dispatcher
config parsing with validation (warns on invalid/below-1 values).
This commit is contained in:
SimbaKingjoe 2026-05-18 20:50:08 -07:00 • committed by Teknium
parent d3345cc70d
commit 5fdcfd851f
3 changed files with 102 additions and 0 deletions
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15
hermes_cli/kanban_db.py
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@ -4112,6 +4112,7 @@ def dispatch_once(
ttl_seconds: Optional[int] = None,
dry_run: bool = False,
max_spawn: Optional[int] = None,
max_in_progress: Optional[int] = None,
failure_limit: int = DEFAULT_SPAWN_FAILURE_LIMIT,
board: Optional[str] = None,
) -> DispatchResult:
@ -4209,6 +4210,20 @@ def dispatch_once(
"WHERE status = 'ready' AND claim_lock IS NULL "
"ORDER BY priority DESC, created_at ASC"
).fetchall()
# Honour kanban.max_in_progress: if the board already has enough running
# tasks, skip spawning this tick so slow workers (local LLMs,
# resource-constrained hosts) can finish what they have before more tasks
# pile up and time out.
if max_in_progress is not None and ready_rows:
in_progress = conn.execute(
"SELECT COUNT(*) FROM tasks WHERE status = 'running'"
).fetchone()[0]
if in_progress >= max_in_progress:
return result
# Only spawn enough to reach the cap, respecting max_spawn too.
remaining = max_in_progress - in_progress
if max_spawn is None or max_spawn > remaining:
max_spawn = remaining
spawned = 0
for row in ready_rows:
if max_spawn is not None and running_count + spawned >= max_spawn: