2026-08-05 · MVP hub live

xbgst · Grok-native godspeed

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

The Grok-native orchestration surface

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.

  • Host specialists — Grok Build subagent concurrency default 16 (max_concurrent / GROK_SUBAGENTS_MAX_CONCURRENT).
  • L3 sekhmet — swarm default 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

Judge → specialists → swarm

Four layers, one direction of travel. Concurrency planes stay independent so host specialists and L3 workers never compete for the same cap.

  1. 01

    xbgst judge

    route / score / gate

    Orchestration surface that scores work and routes to specialists.

  2. 02

    specialists

    host subagents

    Grok Build sibling specialists — default max concurrent 16.

  3. 03

    sekhmet L3

    xbrd-spark swarm

    Heavy parallel fan-out — default −j 64 swarm jobs.

  4. 04

    tmux-orch

    session substrate

    Protected sekhmet session — ensure, attach, never kill session 0.

Concurrency

Host 16 vs L3 64

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

Repos & surfaces

Install path, host surface, L3 substrate, product marketplace, and ops tooling — one map of the stack.

VeigaPunk on GitHub →