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…ware DAG routing (#2424, #2425) Utility-guided tool dispatch (zeph-tools, zeph-core): - Add UtilityScorer in zeph-tools/src/utility.rs scoring tool calls on estimated gain, step cost, redundancy, and uncertainty - Insert utility gate in tool_execution/native.rs: fail-closed on scoring errors, LLM-requested tools always go through the gate - Config: [tools.utility] enabled, threshold, and per-signal weights with startup validation rejecting negative and non-finite values - 21 unit tests covering edge cases, fail-closed behavior, and turn reset Cascade-aware DAG routing (zeph-orchestration): - Add CascadeDetector in zeph-orchestration/src/cascade.rs tracking per-region failure rates with bounded region_health map - Extend TopologyClassifier with TreeOptimized and CascadeAware dispatch strategy variants; merge strategy() and strategy_with_config() into single method - Integrate cascade reordering in DagScheduler::tick(); Sequential tasks skipped from reordering; region health reset on inject_tasks() - Config: [orchestration] cascade_routing, cascade_failure_threshold, tree_optimized_dispatch; cascade_routing requires topology_selection=true - 14 unit tests covering inject_tasks reset, sequential exclusion, and config guard Closes #2424, #2425
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Summary
UtilityScorerinzeph-toolsscoring tool calls on estimated gain, step cost, redundancy, and exploration bonus before dispatch; fail-closed on errors; disabled by default via[tools.utility] enabled = falseCascadeDetectorinzeph-orchestrationtracking per-region failure rates in the DAG scheduler; deprioritize failing regions in the ready queue; two newDispatchStrategyvariants (TreeOptimized,CascadeAware); reset oninject_tasks(); disabled by defaultChanges
crates/zeph-tools/src/utility.rs— newUtilityScorerwith interior mutability (21 unit tests)crates/zeph-orchestration/src/cascade.rs— newCascadeDetectorwith bounded region health map (14 unit tests)crates/zeph-orchestration/src/topology.rs—TreeOptimized/CascadeAwarevariants, merged strategy selection methodcrates/zeph-orchestration/src/scheduler.rs— cascade integration intick(),inject_tasks()reset, Sequential exclusioncrates/zeph-core/src/agent/tool_execution/native.rs— utility gate at tool dispatchcrates/zeph-tools/src/config.rs—UtilityScoringConfigwith startup validationcrates/zeph-config/src/experiment.rs—cascade_routing,cascade_failure_threshold,tree_optimized_dispatchfieldsTest plan
cargo +nightly fmt --check— cleancargo clippy --workspace --features full --lib --bins -- -D warnings— zero warningscargo nextest run --workspace --features full --lib --bins— 6810 passed, 15 skippeduser_requestedbypass restricted to explicit user commands only, config rejects negative weights