th-a78e1e: rename current_datetime → get_current_datetime (stop auto-mode prompts)

[brentrager]

Problem

Big Smooth's auto-mode (AcceptEdits) prompted the user before every clock read:

current_datetime is not a recognised safe tool. Allow current_datetime?

Auto-mode has no "problematic tools" list — it auto-allows tools it recognises as safe and asks about the rest. The engine's classifier (smooth_operator::permission::tool_category) grades a tool by name: get_*/read_*/list_*/*search* → read-only-safe (silent), mutating names → edit (silent under AcceptEdits), everything else → Unknown → ask. The clock tool is a pure, argument-free read, but the bare name current_datetime had no safe prefix, so it fell into Unknown and prompted.

Fix

Rename the tool current_datetime → get_current_datetime so the classifier recognises it as a safe read and auto-allows it (same reason read_file/list_files never prompt).

• Regression test asserts the engine returns Verdict::Allow for the name under AcceptEdits — fails loudly if the name loses its get_ prefix or the heuristic moves.
• Module note so nobody "tidies" the name back.
• Updates the persona roster, the family safe-read allow-list (family.rs + ADR-008), the reminders relative-date guidance, and Using-th-CLI.md.

Not in scope (tracked)

• th-cc0894 — wire the "always allow" grant (don't-ask-again) + a UI button. It's deliberately unwired today because SharedGrants was private in the pinned core; that's why there's only Yes/No.
• th-4c71a6 — engine: classify tools by a declared read_only/safe flag instead of the name heuristic, killing the whole class (create_artifact, remember, calendar/reminders reads) once the daemon catches up off core 1.7.0.

Verification

• cargo test -p smooai-smooth-tools --lib → 263 passed (incl. new tool_name_is_classified_safe_and_auto_allowed)
• cargo test -p smooai-smooth-policy --lib family → 11 passed
• cargo build -p smooai-smooth-daemon → clean

🤖 Generated with Claude Code

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🦋 Changeset detected

Latest commit: 65f1405

The changes in this PR will be included in the next version bump.

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Name	Type
@smooai/smooth	Patch

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