The ship-docsync E2E flaked on this sandbox because the driven agent
resolved the STOP pointer's ~ to nonexistent homes (/root, /home) and
acted blind — pass/fail sampled model priors, not the prompt. The
fixture prompt now names the planted sections dir, making local runs
deterministic (CI, with real install paths, was always diagnostic).
With a diagnostic fixture: 2/2 passes, real pr-body read, Agent dispatch
with run_in_background: false, zero Skill-tool substitutions.
Prose: the foreground note now states the dispatch happens ONLY via the
Agent tool (invoking the target as a Skill is wrong even though it
appears in the skills list; inline FALLBACKs apply only after a
dispatched subagent has failed), and the Step 18 imperative carries the
never-the-Skill-tool clause at the decision point.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
