Publish a per-version release report for `eval/token_ceiling_formula.py` every time `FORMULA_VERSION` bumps — the exact configuration (formula, signal weights, calibration constants), a ranked gap list for the next contributor, and what's settled and not worth re-relitigating. Why this is its own skill rather than folding into `model-right-sizer-research-report`: every claim must interweave WHY it matters, in the same breath as WHAT changed — it stays decision-support only if a reader can tell, without a second file, what breaks (wasted spend, false alarms, undetected overruns, a re-biased fleet of budgets) if a number or gap is wrong. Never a new-finding surface — synthesizes only from committed results files. Also the tool for BACKFILLING a report for a past version that shipped before this skill existed. Use when someone says "write the release report for this version", "version the token ceiling formula", "backfill a release report for v0.x", or after any `FORMULA_VERSION` bump.