The script runner now registers each workspace agent script as a sync unit during initialization, making all scripts immediately visible via coder exp sync list. As the script runner executes each script, its unit status transitions through the lifecycle: pending, started, completed.

Problem

The agent/unit.Manager (sync unit system) and agent/agentscripts.Runner (script runner) were independent. Scripts run by the agent were invisible to coder exp sync list, and there was no way to observe script lifecycle through the dependency coordination system.

Changes

Shared unit.Manager (composition root)

Previously, unit.NewManager() was created inside agentsocket.NewServer(), hidden from the rest of the agent. This PR lifts it out so the agent creates a single unit.Manager and passes it to both the script runner and the socket server.

• agent/agentsocket/server.go: NewServer takes *unit.Manager as an explicit required parameter instead of creating its own.
• agent/agent.go: Creates a shared unit.NewManager() in init(), passes it to both agentscripts.New() and agentsocket.NewServer().

Script lifecycle tracking

• agent/agentscripts/agentscripts.go: Options gains a UnitManager field. Init() registers each script using its DisplayName as the unit ID. run() marks the unit as started before execution and completed after (regardless of success/failure).
• Unit name uses DisplayName for now. Uniqueness enforcement is deferred to a follow-up.
• All unit manager calls are nil-guarded, so the runner works without a manager (backwards compatible).

Tests

• Updated all NewServer call sites in tests to pass unit.NewManager().
• Added TestScriptUnitsRegistered: verifies scripts with display names are registered as pending units during Init, and scripts without display names are skipped.
• Added TestScriptUnitsLifecycle: verifies the full pending, started, completed transition through Execute.

Init()                → Register(displayName)           → pending
run() before start    → UpdateStatus(_, StatusStarted)  → started
run() after complete  → UpdateStatus(_, StatusComplete) → completed

Generated by Coder Agents on behalf of @SasSwart