Audit findings F5, F6 and F11 for issue #124.
F5, goal guards:
- goal_met refuses while any goal node of the task is open, and when the
goals cannot be read. A task without goal nodes keeps the old behavior.
- prove_goal accepts a fact as evidence only when its confidence is
"observed"; otherwise it refuses and the goal stays open. Findings are
still accepted.
F6, hint origin:
- add_hint stores the calling ToolSet's worker as the hint origin instead
of "human", and passes it to the planner trigger (TriggerEvent.HintOrigin).
- renderTriggers names the writer: the human via the main agent, a
cross-task orchestration, or an agent, with a neutral fallback.
F11, built-in rules for the planner and the main agent:
- Interceptor.MatchBuiltin evaluates the enabled "[built-in]" deny rules on
the intercept-enabled tools.
- The target-only guard applies them before the target gate, whether the
gate is on or off. User rules and the judge stay out of it.
- SetRulesForTest is a test seam for the store-less guard tests; Log is a
no-op without a store.