feat(orchestration): TaskGraph core types, DAG operations, persistence (Phase 1, #1235)#1249
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feat(orchestration): TaskGraph core types, DAG operations, persistence (Phase 1, #1235)#1249
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…e (Phase 1, #1235) (#1236) Add task orchestration module with core types (TaskGraph, TaskNode, TaskId, GraphId, TaskStatus, GraphStatus, FailureStrategy, TaskResult), DAG algorithms (validate, toposort, ready_tasks, propagate_failure), OrchestrationConfig, OrchestrationError, and SQLite persistence via RawGraphStore/GraphPersistence. All code feature-gated under `orchestration` (optional, included in `full`). Migration 022_task_graphs.sql with JSON blob persistence. 53 new tests.
…ase1 # Conflicts: # CHANGELOG.md
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Summary
Implements Phase 1 of the Task Orchestration epic (#1235), delivering core types, DAG algorithms, and SQLite persistence for task graphs. Closes #1236.
TaskGraph,TaskNode,TaskId,GraphId,TaskStatus(7 variants),GraphStatus(6 variants),FailureStrategy(4 variants),TaskResultvalidate(structure + cycle detection via Kahn's),toposort,ready_tasks(idempotent),propagate_failure(Abort/Skip/Retry/Ask with BFS transitive propagation)RawGraphStoretrait in zeph-memory (raw JSON),GraphPersistence<S>typed wrapper in zeph-core,SqliteGraphStoreimplementation, migration022_task_graphs.sql[orchestration]TOML section withenabled,max_tasks,max_parallel,default_failure_strategy,default_max_retries,task_timeout_secsorchestration(optional, included infull)Key design decisions
RawGraphStoreoperates on opaque JSON strings in zeph-memory; zeph-core handles typed serialization viaGraphPersistence<S>task_graphstable) — simpler for MVP, per-node queries deferred to Phase 3max_tasksenforced invalidate(),goallength capped at 1024 charsFailureStrategy::FromStr+OrchestrationConfig::failure_strategy()for validated config parsingStats
Test plan
cargo +nightly fmt --checkcargo clippy --workspace --features full -- -D warningscargo nextest run --workspace --features full --lib --bins(4174 passed)cargo check --workspace(compiles without orchestration feature)