* fix(#2957): claude+global post-install instructs restart and skill fallback
`npx get-shit-done-cc --claude --global` writes skills to
`~/.claude/skills/gsd-*/SKILL.md` (CC 2.1.88+ format) and removes the
legacy `~/.claude/commands/gsd/`. The post-install message still told
users to type `/gsd-new-project` without mentioning the required Claude
Code restart or the skill-name fallback. On configurations where CC
does not auto-surface skills in the slash menu, users hit "no commands
appear" and assumed the install failed.
Split the post-install message: the existing single-line instruction
stays for every non-Claude runtime and for `--claude --local`. For
`--claude --global` it now reads:
Restart Claude Code, then in any directory either type
/gsd-new-project or ask Claude to run the gsd-new-project skill.
This covers both invocation paths and surfaces the restart requirement.
Add tests/bug-2957-claude-global-postinstall-message.test.cjs as a
regression guard: captures the printed message for claude+global,
claude+local, and opencode+global; asserts content for each. Verified
the test fails on main (pre-fix) and passes after the fix.
Closes#2957
* test(#2957): assert legacy generic instruction is replaced not extended
CodeRabbit flagged that the test would still pass if the new restart/
fallback copy were printed *alongside* the old 'open a blank directory'
instruction. Adding a doesNotMatch assertion proves the claude+global
branch replaces the legacy line rather than appending to it.