Replace finite clone/worktree boolean allowlists with the closed separate-value grammar, including Git's accepted long abbreviations and bundled short options. Keep placement operands distinct from HOME-valued sources, metadata, commit-ish values, and rule-generated --no-* flags while preserving separate-git-dir and later-command traps.
Canonicalize shell-known HOME spellings, dot aliases, and existing symlink parents before placement comparison. Expand the hermetic suite from 242 to 292 fixtures and document the requirements and review evidence.
Deliberate residuals: a future unclassified value-taking clone placement option can fail open, and a future worktree value option can shift the inferred path; defaulting it to flag grammar avoids present-day over-blocking of Git's non-enumerable boolean family. PreToolUse symlink canonicalization is non-atomic against replacement after inspection; architectural closure is tracked by #1199.
Classify git clone and worktree add operands so HOME-valued environment assignments, sources, references, templates, and metadata do not impersonate checkout destinations. Preserve both forms of clone --separate-git-dir as real placement targets and distinguish shell words, command boundaries, and redirections in the existing quote-aware normalized stream.
Deliberate fail-closed residual: unknown future Git options with a separate following word are not adjudicated as source-only. Their value remains a possible placement, so a HOME-shaped value blocks rather than silently creating a bypass. Relative destinations whose effective path depends on cwd remain out of scope in #1197.
Hermes Agent