Parallel FSI stacks (worktree port override)

Shared writing standard

Before you write user-facing prose or artifact prose, read and apply the shared ASD-STE100 skill. Preserve this skill's required output contract.

If the shared skill or profile is unavailable, state that limit in the response. This notice is the only exception to an exact-output rule. Then apply ASD-STE100 as closely as possible from the available context.

Two FSI stacks cannot run at once out of the box. This skill generates a throwaway Compose override that shifts one stack onto its own ports, container names, image tag, and log directory — so a worktree branch runs beside the standard fsi stack.

Slot convention: slot N offsets every host port by N × 100. Slot 0 is the standard layout — never generate an override for slot 0.

Naming convention

The tag is <branch-slug>-<interface port>. Branch FACS-824 at slot 3 gives facs-824-8376.