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This PR is some responsive security hardening against the class of attack we just saw here: https://www.aikido.dev/blog/telnyx-pypi-compromised-teampcp-canisterworm
Pin all GitHub Actions to commit SHAs — every action in docs.yml and the new zizmor.yml is
pinned to a verified, GPG-signed commit that predates the March 19 attack window. Tags kept
as comments for readability.
Scope workflow permissions — pages:write and id-token:write moved from top-level down to
just the deploy job. The build job (which installs the full pixi env) now only has
contents:read
Dependency cooldown — added exclude-newer = "2026-03-16T00:00:00Z" to pixi.toml so the
solver can't pull in packages published during/after the attack window, even when re-solving
the lockfile - note that with feat: Relative exclude-newer configuration prefix-dev/pixi#5786 being merged we will shift to a relative-time approach which will be a bit more user-friendly, but this is very conservative in the sense that any attempted updatw will just kick and require the user to update this hardcoded datetime.
Pin devcontainer base image — ghcr.io/prefix-dev/pixi image pinned to its digest so the tag
can't be swapped out by a bad actor one day
Dependabot for Actions — new .github/dependabot.yml with monthly updates and a 14-day
cooldown on new releases, which is maybe overly conservative but I'm a bit spooked!
Zizmor audit workflow — new CI workflow that runs a GitHub Actions security audit on any
workflow file changes, results go to the Security tab!