#10443: feat: add visible terminal support for coding agents

Adds launch-visible.sh helper and SKILL.md instructions for running agents in visible screen sessions. <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> - Updates `skills/coding-agent/SKILL.md` to document a new “Visible Mode” flow for running Claude Code/agents in a host Terminal while keeping background control. - Adds `skills/coding-agent/launch-visible.sh`, which wraps an arbitrary command in a `screen` session with logging and uses `osascript` to open macOS Terminal attached to the session. - This lives under the `coding-agent` skill tooling/docs and is intended as a convenience helper for interactive agent sessions. <h3>Confidence Score: 3/5</h3> - Mostly safe to merge, but the helper script has a clear shell-injection footgun if it’s ever used with untrusted or dynamically constructed input. - Changes are confined to a new macOS-specific helper script and documentation. The main concern is `launch-visible.sh` building a `bash -c` string with unescaped user-provided command text, which can execute unintended shell fragments. If the script is only ever used manually by trusted operators, impact is limited, but it’s still easy to misuse. - skills/coding-agent/launch-visible.sh <!-- greptile_other_comments_section --> _{(2/5) Greptile learns from your feedback when you react with thumbs up/down!} <!-- /greptile_comment -->