Add the coordination skill and task-worker profile

[Aaronontheweb]

Base: #2421. This is the third draft PR in the stack.

Netclaw gains delegation guidance, the agent-coordination skill, and a default task-worker profile that uses the Main model role. Small resources cover source analysis, complete plans, independent code review, defect analysis, and parallel research.

The parent reviews complete child artifacts before conclusions or file delivery. The guide explains status, cancellation, partial results, and live-log access through existing file tools. The parent ends its turn when it needs a canonical child continuation and has no independent work.

Integrated verification repairs spawn-field alias checks, a plan-column assertion, and sidecar template suppression. The CI matrix moves one complete mutation gate to another group. All 14 gates and the 25-minute timeout remain intact.

Why this is safe: The profile adds no authority grant. Existing project, path, and tool policies remain decisive. The adapter changes only explicit suppression requests for its declared dialect. It retains unrelated template values. The oracle repairs retain ownership, behavior, scope, and output-format requirements. Peer messages and live steering remain deferred.

Validation at c56fd8fa:

• Root passes 111 affected spawn-case tests and 65 artifact tests.
• The adapter candidate passes 77 targeted .NET tests. Nine controls fail against the old adapter. Independent review approves its exact source and evidence.
• Slopwatch, copyright headers, and whitespace checks pass. Independent review approves all current repairs.
• Four earlier process cases pass independent review: routed activation, approval prompts, cancellation, and journal-only owner recovery.
• Each model trial uses a fresh container and data home. The trivial case passes twice. The unavailable-profile case passes once, then fails because prose follows its JSON object.
• The code workflow fails report, command-scope, and final-format requirements. Both children complete.
• The analysis artifacts pass the corrected oracle offline. The original complete-trial false verdict remains unchanged.
• Compaction remains inconclusive because no recovery-model handoff occurs. No fresh model trial validates the adapter fix.
• The prior head 91ef75bc finishes with 28 successful CI checks and one mutation-job timeout. The current head needs fresh CI proof.

Fresh model acceptance, private replay, shadow review, the productive holdout, and final verification remain open. This PR remains a draft. No merge, release, live skill publication, or deployment occurs.