A company-runtime resume checkpoint pins each task to one exact
execution backend. When that pinned external agent is disabled in the
config (issue #10: all external agents off), every resume claimed the
card, transitioned it to RUNNING, and crashed deterministically in the
dispatch-time selector ("company runtime resume requires unavailable
external agent"), feeding the restart -> resume -> crash loop.
Gate availability at resume preparation instead, before any pin or
claim: fail the single work item closed (FAILED + diagnostic
blocked_reason + progress note) while the rest of the organization
resumes normally. attempt_seq stays 0 - no dispatch attempt is burned.
A missing adapter registry means availability is unknown, so the gate
fails open and leaves the decision to the dispatch-time guard.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
LZH-YS1998
d380684b78