v0.10.0 — opt-in weak-binding gate

A pre-release adding an opt-in, seal-time review gate plus Claude Code onboarding. No change to default behavior, trust/claim state, the sidecar schema, fold policy, checker grammar, dependencies, or the GitHub Action.

New: --binding-gate off | warn | fail

On dorian verify and dorian seal (default off):

• warn — seal, then print weak-binding diagnostics (exit 0).
• fail — refuse the seal before writing any sidecar (atomic no-write, exit 4) when a claim carries a high-risk weak-binding flag: unbacked, short-literal, ambiguous-mention, trigger-only-symbol, unwatched-mention.
• single-file is warn-only — the expected shape of an honest one-checker C3 path:/symbol:/regex: claim.

Weak binding is a false-confidence smell: the gate never marks a claim false and never touches trust or claim state. dorian bindings stays a pure linter.

Also in this release

• Claude Code onboarding: docs/USE_WITH_CLAUDE_CODE.md + a runnable examples/claude-code/ pack.
• docs/PUBLIC_BENCHMARK_PROTOCOL.md (pre-registered, protocol-only) and docs/TRUSTED_BASE_ACTION_DESIGN.md (design only, not implemented).
• docs/START_HERE.md navigation index.

CI green on Python 3.11 / 3.12 / 3.13. Not published to PyPI.

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