docs: leave the skill default to its own PR, and say what stays on the Mac

The skill-on-by-default change ships in its own pull request with the self-ignoring copy, so this branch keeps the old default and its wording. The local models guide no longer says nothing leaves the machine: the prompts go to the local model, while the coding agent may still check for updates.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/local-models.md

@@ -1,7 +1,8 @@
 # A model that runs on this Mac
 
-Codeman can set up a coding model that runs on the Mac the server runs on: no account, no
-API key, nothing leaves the machine. One button on the welcome screen opens a window that
+Codeman can set up a coding model that runs on the Mac the server runs on: no account and
+no API key, and the session's prompts and files go to a model on this Mac rather than a
+cloud provider (the coding agent itself may still check for updates). One button on the welcome screen opens a window that
 shows what fits this Mac, installs the choice and ends on a coding agent session that
 runs on it.
 

docs/wiki/Codeman-Skill.md

@@ -54,9 +54,7 @@ Pick one route. The skill only acts inside a Codeman session, so a global instal
 | Web UI             | **App Settings → Agents & CLIs → All agent CLIs → Codeman Agent Skill**         | Injects it into each case when a session is created, where that session's CLI looks: `.claude/skills/` for Claude Code, `.agents/skills/` for Codex, Gemini CLI, OpenCode, Antigravity, Grok, DeepSeek and OMP. Off by default. |
 
 Use the plugin **or** `codeman skill install`, not both: a Claude Code with both lists the
-skill twice (`codeman` and `codeman:codeman`). The per-case copy the Codeman Agent Skill
-setting writes (on by default) does the same beside the plugin, so turn that setting off
-if you use the plugin.
+skill twice (`codeman` and `codeman:codeman`).
 
 The web UI route skips pi, because a project skill makes pi ask to trust the folder at
 startup. A pi or plain shell session uses the [`codeman agent`