Temper Eval Harness — Calibrate Wrapper

Invocation:

/temper-eval-calibrate <run-id-prefix> [--k N] [--source SOURCE] [--fixture <id>]
                                       [--write-baseline] [--compare-baseline]
                                       [--trials-override N] [--max-parallel N]
                                       [--timeout N]

Pre-conditions:

• A Claude Code session is active
• <run-id-prefix> matches ^[A-Za-z0-9_][A-Za-z0-9_-]{0,28}$ (I-9; aligned with _runid.py's _PREFIX_RE; reserves 3 chars for -<i> suffix)

Post-conditions:

• For each i in 1..k, skills/temper/evals/.calibrate-state/<prefix>-<i>-complete exists AND skills/temper/evals/.calibrate-state/last_run-<prefix>-<i>.json exists with run_id == <prefix>-<i>
• A per-iteration summary line is emitted to stdout