pstack: name maintain source readers and stop routing the pass through swarm

[0xrep]

The source wave had no role name, so pstack-models.mdc could not bind it and operators treated the pass as a /swarm. That composition hits the cloud async cap and drops readers.

This names the role maintain source readers, defaults it to inherit-parent, and spawns with readonly: true. The coordinator still owns every live drive and executes the map's own Driving section, not child-derived recipes. verified-unreachable is a clean coverage result when the prerequisite and route are named. A product gap stays in the report and does not flip the pass to changed or blocked.

The guide no longer says a /swarm can split a full map pass. That line was how the wrong composition got taught.

Skipped: fan-out caps, shared-harness re-drive, churn window, retry-once unit. Those remain operator notes.

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Note

Low Risk
Documentation and agent-skill instructions only; no product code, auth, or runtime behavior changes.

Overview
Introduces a dedicated maintain source readers role for /maintain-verification-skill’s parallel source wave so /setup-pstack can bind it in pstack-models.mdc (default inherit-parent). The maintain skill now spells out spawning those children as read-only generalPurpose tasks and explicitly says not to wrap the pass in /swarm—readers are not swarm workers; the coordinator still runs every live drive from the map’s Driving it with harness text, with child recipes only for drift reconciliation.

Outcomes are tightened: clean counts source coverage plus live drive or documented verified-unreachable; product gaps in the report alone don’t force changed/blocked. blocked applies when a feature never got a source-wave return or wasn’t driven/classified. Target selection when multiple verify skills exist prefers the path in the current diff instead of guessing.

The verify-and-ship guide drops the line that taught splitting a full map pass via /swarm and mirrors the new maintain behavior and anti-swarm guidance.

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