Agent Architecture Review, Snapshot di validazione

Design for delegation rather than direct manipulation

The workflow is structured around delegated work rather than manual step execution: `Policy` captures operator constraints, `create_run()` binds a `policy_hash`, `draft_tasks()` classifies invoices, and `execute_approved_payments()` submits only approved tasks. Operators have explicit controls through `approve()`, `pause_run()`, `resume_run()`, `cancel_run()`, and `retry_failed_task()`. Delta: this improves the prior P1 finding by making the run-owned policy hash load-bearing in drafting and audit events.

Align feedback with the user’s level of attention

Feedback is proportionate and durable: `DurableOperatorInbox.post()` persists intervention alerts to JSONL, bank and policy failures create warning/critical alerts, and `inspect_run()` surfaces `critical_alerts` plus task-level `failure_class` and `failure_message`. Routine state is summarized through `summary.by_status`, while attention-required failures carry alert IDs. Delta: this addresses the prior P3 recommendation by replacing an in-memory inbox with a durable operator-facing inbox.

Apply progressive disclosure to system agency

`inspect_run()` separates a primary operational summary (`status`, `policy_hash`, `audit_chain_intact`, `critical_alerts`, and `summary.by_status`) from per-task details such as invoice snapshot hashes, approver fields, transfer IDs, and failure messages. The code therefore supports a default overview with deeper inspection when needed. Delta: this maintains the prior aligned P4 result.

Expose meaningful operational state, not internal complexity

The workflow exposes user-relevant states through `RunStatus` values such as `AWAITING_APPROVAL`, `PAUSED`, `EXECUTING`, `PARTIALLY_COMPLETED`, `CANCELLED`, and `FAILED`, plus `TaskStatus` values such as `APPROVED`, `SUBMITTED`, `SUCCEEDED`, `FAILED`, and `SKIPPED`. `inspect_run()` presents these states with counts and actionable task failure fields rather than only low-level log entries. Delta: this maintains the prior aligned P6 result.

Establish trust through inspectability

The audit path includes a real inspectability primitive: every `AuditEvent` carries `sequence_no`, `prev_event_hash`, and `event_hash`; `_hash_event_body()` canonicalizes the event body; `RunLedger.append()` chains per-run events; and `verify_chain()` detects sequence, previous-hash, or body-hash divergence. Events include policy hashes, invoice snapshots, approvals, submissions, bank responses, failures, cancellations, and retries, and `inspect_run()` reports `audit_chain_intact` plus the first divergent event ID. Delta: this addresses the prior P7 recommendation by adding a hash-chained ledger and verification path.

Represent delegated work as a system, not merely as a conversation

Delegated work is represented as a structured system: `PaymentRun` owns the lifecycle, `PaymentTask` models per-invoice work, `RunLedger` records ordered events, `DurableOperatorInbox` records intervention alerts, and `inspect_run()` returns a task list plus aggregate status counts. Execution state is separate from conversational or prompt-like input. Delta: this maintains the prior aligned P9 result.