The Codex security review workflow now authorizes automatic reviews from
the live pull request instead of the webhook snapshot. This prevents a
stale author association from sending an internal PR down the
external-contributor invalidation path.
Internal PRs with no previous review now exit without attempting a
comment or label mutation. The jobs that update PR comments and labels
use `pull-requests: write`, and the review job runs only after the
trusted prepare step emits `authorized=true`.
Regression tests cover stale author associations in both directions, the
no-op invalidation path, and the mutation-job permission contract.
Checked with `just ci`, `just security-review-check`, and `actionlint
.github/workflows/codex-security-review.yml`.
The failing `Mark Previous Review Stale` check on this PR runs the
pre-fix `pull_request_target` workflow from `main`. GitHub will not
execute this branch’s trusted workflow until it is merged; the new
workflow contract and state-machine tests exercise the fix before then.
Signed-off-by: Jordan Mecom <jm@squareup.com>
Add a gated Codex security review for Buzz pull requests.
Reviews run automatically for Block organization members. External PRs
require a `@buzz-security-review` comment from a Block member, and every
new external push invalidates the previous result.
Codex reviews the PR SHA in a read-only, network-restricted job with no
write GitHub token. A separate trusted job validates and sanitizes
structured findings before posting them. The workflow uses the dedicated
`CODEX_REVIEW_API_KEY` secret.
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Signed-off-by: Jordan Mecom <jm@squareup.com>
