Operational problem
Agents needed reliable local operations without a generic shell escape hatch.
Repeated command construction created friction, inconsistent error reporting, and unclear authority boundaries. The meaningful problem was not merely command execution: it was how to offer a bounded catalog that could be called consistently, audited durably, recovered safely, and exercised from both agent and product-local workflows.
Users & constraints
One operation contract, two execution surfaces, explicit authority.
- MCP and the product-local PAO CLI share the same fixed typed operation catalog.
- Generic command strings are excluded from the contract.
- Authenticated user and System execution remain separated rather than blurred by convenience.
- Filesystem work must defend against unsafe paths and reparse behavior.
- Process identity, bounded output, cancellation, durable receipts, installation, repair, and rollback are part of the system—not afterthoughts.
Architecture & tradeoffs
A service-backed execution boundary rather than a collection of scripts.
Typed clients
MCP and PAO CLI submit one named operation plus separately validated arguments.
Authority boundary
User and System work remain explicit across the local named-pipe and service boundary.
Durable execution
SQLite/WAL queueing, idempotent receipts, bounded output, and deterministic cleanup preserve recoverability.
Install and repair
Self-contained packaging, service/tray lifecycle, repair, ACL restoration, migration, and rollback stay within the product contract.
What Shayne owned
The field contract and acceptance boundary.
AI role
Specialist implementation under human technical direction.
AI agents contributed implementation, testing, diagnosis, and review work within bounded modules. Shayne retained the problem definition, schema and usability requirements, authority decisions, architecture tradeoffs, correction of false assumptions, and final acceptance. The public ownership model distinguishes Shayne's technical direction and acceptance from the implementation work performed by specialist agents.
Verification
Multiple evidence layers, plus a real repair scenario.
The repair fixture restored deliberately damaged access controls and restarted a stopped service after an active MCP client drained. Together, these checks establish the installed single-workstation Prod Alpha and its repair behavior.
Result & next stage
A self-contained, installed Windows Prod Alpha.
The result is an implemented and tested self-contained Windows x64 Prod Alpha that was packaged, installed, and live-verified on one developer workstation. The next validation stage expands compatibility and lifecycle testing across additional Windows systems and operating conditions.