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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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26
gateway/run.py
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@ -4776,6 +4776,31 @@ class GatewayRunner:
if max_spawn is not None:
logger.info(f"kanban dispatcher: max_spawn={max_spawn}")
# Cap the number of simultaneously running tasks so slow workers
# (local LLMs, resource-constrained hosts) don't pile up and time
# out. When set, the dispatcher skips spawning when the board
# already has this many tasks in 'running' status.
raw_max_in_progress = kanban_cfg.get("max_in_progress", None)
max_in_progress = None
if raw_max_in_progress is not None:
try:
max_in_progress = int(raw_max_in_progress)
except (TypeError, ValueError):
logger.warning(
"kanban dispatcher: invalid kanban.max_in_progress=%r; ignoring",
raw_max_in_progress,
)
max_in_progress = None
else:
if max_in_progress < 1:
logger.warning(
"kanban dispatcher: kanban.max_in_progress=%r is below 1; ignoring",
raw_max_in_progress,
)
max_in_progress = None
else:
logger.info(f"kanban dispatcher: max_in_progress={max_in_progress}")
raw_failure_limit = kanban_cfg.get("failure_limit", _kb.DEFAULT_FAILURE_LIMIT)
try:
failure_limit = int(raw_failure_limit)
@ -4828,6 +4853,7 @@ class GatewayRunner:
conn,
board=slug,
max_spawn=max_spawn,
max_in_progress=max_in_progress,
failure_limit=failure_limit,
)
except Exception: