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C4-008DecidedSystem ArchitectureDerived2026-04-05

Prefer Command-First Mobile Interaction — Reserve Full Remote Desktop for Escalation

Mobile interaction defaults to secure command execution and status retrieval — not full graphical remoting. Phone-sized screens make visual remoting expensive for routine tasks: high bandwidth, latency-sensitive, poor ergonomics. Command-first is faster, more reliable on unstable networks, and suited to brief operational windows. Full remote desktop remains available as escalation.

Freshness
Active

Active. Reverify if phone-based work becomes primarily graphical or if command-first stops covering the majority of mobile needs.

Dependencies
← C4-005: Assign Distinct Roles to Distinct Machines — No Unified Pattern

Used by

→ C4-009: Build a Command System with Progressive Promotion — Repeated Actions Earn Their Shortcut→ C4-016: Publish the Reasoning Chain — Obfuscate the Deployment
#mobile#command-first#remote-desktop#ergonomics#fragmented-time

Capture

The operator needs to act from a phone during fragmented time: checking status, triggering work, monitoring jobs, making small changes, verifying state.

These interactions happen in brief windows — between meetings, during transit, in moments that do not support extended graphical engagement. The interaction model must be suited to that reality.

Why

Phone-sized interaction punishes visual remoting for routine tasks.

Full remote desktop on a phone requires sustained attention to a small, latency-sensitive graphical surface. It consumes bandwidth, degrades on unstable networks, and demands more ergonomic investment than brief operational windows warrant. For status checks and command invocations — the majority of mobile work — this overhead is entirely unnecessary.

Command-first interaction is lower bandwidth, faster to initiate, more reliable on poor networks, and better suited to brief windows. A command that checks a job status or triggers a workflow takes seconds. The equivalent visual remoting operation takes minutes and requires the phone to be held stably.

The retained flexibility matters: the operator cannot predict every command in advance. Raw access through a command layer preserves generality that a fixed one-tap shortcut surface would eliminate.

Why-Not

Why not default to full remote desktop on the phone? It is ergonomically expensive and unnecessary for most mobile operations. The ergonomic cost — small screen, touch keyboard, network sensitivity — is paid on every interaction, including the simple ones where it adds no value. Defaulting to the expensive path makes routine operations harder than they need to be.

Why not reduce the phone to fixed one-tap actions only? The future command set is unknown and emergent. Locking mobile interaction to a predetermined shortcut surface removes the ability to issue commands that were not anticipated at setup time. The operator needs the flexibility to respond to conditions that were not predicted.

Commit

Decision: Mobile interaction defaults to secure command execution and status retrieval. Full graphical remoting remains available as an exception path for tasks that genuinely require it — not as the default.

Confidence: High. Command-first is not a convenience choice; it is the correct ergonomic and security fit for the mobile use case.

Timestamp

2026-04-05

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