Host · Grok Build
16
Sibling specialist subagents
Per parent session. Not Codex thread caps. Not L3 workers. Controlled by
max_concurrent / GROK_SUBAGENTS_MAX_CONCURRENT.
Static hub for the Grok Build / xbreed stack — judge, specialists, livepatch, and Sekhmet L3 swarm. Name axes, iterate cheap in parallel, keep Pareto-improving moves.
What / why
xbgst is the judge: it scores and routes work across specialist subagents, then fans heavy parallel execution into sekhmet L3 (xbrd-spark substrate). Two concurrency planes stay deliberately separate.
16 (max_concurrent / GROK_SUBAGENTS_MAX_CONCURRENT).
64 jobs
(XBRD_SPARK_JOBS=64, sekhmet swarm -j 64).
Livepatch keeps the host CLI hot; marketplace packages install the stack; tmux-orch holds the sekhmet session. External product surface: ds4cc.
Pipeline
Four layers, one direction of travel. Concurrency planes stay independent so host specialists and L3 workers never compete for the same cap.
route / score / gate
Orchestration surface that scores work and routes to specialists.
host subagents
Grok Build sibling specialists — default max concurrent 16.
xbrd-spark swarm
Heavy parallel fan-out — default −j 64 swarm jobs.
session substrate
Protected sekhmet session — ensure, attach, never kill session 0.
Concurrency
Two independent planes. Host specialists run beside the parent session; sekhmet L3 scales swarm jobs on its own substrate.
Host · Grok Build
16
Sibling specialist subagents
Per parent session. Not Codex thread caps. Not L3 workers. Controlled by
max_concurrent / GROK_SUBAGENTS_MAX_CONCURRENT.
L3 · sekhmet
64
xbrd-spark swarm jobs
Independent of host 16. Source ~/.xbgst/env.l3-sekhmet.sh.
Invoke with sekhmet swarm -j 64.
Ecosystem
Install path, host surface, L3 substrate, product marketplace, and ops tooling — one map of the stack.
Core xbrd / xbgst Grok host surface (or install via marketplace xbgst-stack).
Marketplace packages — install path for xbgst-stack.
Livepatch for Grok Build host CLI — hot path updates without full reinstall.
Sekhmet L3 spark substrate — swarm runners and xbgst-l3-orch (−j 64).
Public L3 usage + GATE evidence pack — luna + service_tier=fast, j=64.
ds4cc product marketplace + public site.
tmux orchestration — ensure/attach protected sekhmet session (do not kill session 0).
xbrd sol-ultra toolkit.
xbrd selector — routing / selection helpers.
This hub — polished surface for the stack.