docs: update installation instructions in CLAUDE.md for clarity and add git installation option

fix(cli.py): update zsh completion function to use compdef for better compatibility

Author: ariel-frischer

CLAUDE.md

@@ -22,7 +22,8 @@ make check                    # lint + format check + tests (CI equivalent)
 ## Install globally
 
 ```bash
-uv tool install ".[all]" --from .   # install as `kb` command
+uv tool install "kb[all] @ /home/ari/repos/kb" --force   # install as `kb` command from local
+uv tool install "kb[all] @ git+https://github.com/ariel-frischer/kb.git"  # install from git
 ```
 
 ## Scope Model

src/kb/cli.py

@@ -782,13 +782,12 @@ def cmd_completion(shell: str):
 
     if shell == "zsh":
         print(f"""\
-#compdef kb
 _kb() {{
   local -a commands
   commands=({subcommands})
   _arguments '1:command:({" ".join(subcommands.split())})' '*:file:_files'
 }}
-_kb "$@\"""")
+compdef _kb kb""")
     elif shell == "bash":
         print(f"""\
 _kb() {{