Decides FR-1: a machine-local, user-scope list of dirs prepended to the
PATH of every spawned shell, keyed by repo identity so linked worktrees
(.worktrees/) share their main repo's preset. Prepend-over-login-shell
semantics, D-6 CLI parity (env path verbs), and a security fence: the
preset never feeds clide's own binary resolution (T-98 lesson).
Also corrects D-104's cross-references: the bundled-pql decision is
D-92, not D-58 (D-58 is format engines) — the anchor was dead.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
jpmschweitzerandClaude Fable 5
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