fix(kanban): remove missing avoid-ai-writing skill from swarm synthesizer

[nasymonk]

Summary

The avoid-ai-writing skill was hard-coded in the synthesizer task creation but is not present in the v0.14.0 skill bundle, causing every Kanban swarm synthesizer to crash with Unknown skill(s): avoid-ai-writing in an infinite retry loop.

Root Cause

hermes_cli/kanban_swarm.py:212 references skills=["avoid-ai-writing"] which was removed/renamed between v0.13 and v0.14.

Fix

Remove the stale skill reference so the synthesizer spawns without requiring a non-existent skill. The synthesizer will run with no skill constraints (empty list), which is the correct behavior when the intended skill no longer exists.

Testing

• Verified avoid-ai-writing is not in the current skill bundle
• Verified writing-plans exists as a possible intended replacement (but kept fix minimal)
• Test suite test_kanban_swarm.py should pass as it doesn't assert on specific skills

Fixes #29415

[alt-glitch]

Duplicate of #29067 — same fix (remove stale avoid-ai-writing skill reference from kanban swarm synthesizer). #29067 is already open and triaged.

[teknium1]

Thanks for catching this. Automated hermes-sweeper review found that the stale Kanban swarm synthesizer skill reference has since been fixed on current main.

Evidence:

• hermes_cli/kanban_swarm.py:212 now uses skills=["humanizer"] instead of the missing avoid-ai-writing skill.
• The bundled replacement exists at skills/creative/humanizer/SKILL.md:2 as name: humanizer.
• Commit 69b74c15a324fcac460b5a143e5662036dae6387 made this exact change and cites the underlying #29415 failure mode.
• Main also has regression coverage in tests/hermes_cli/test_kanban_cli_dispatch_passthrough.py:119 asserting the stale skill name stays out of kanban_swarm.py.