Blocker 1 (LFS roundtrip fails on PR #1): - Add UPGRADE_EXTRA_ENV to gitea recipe_meta.py — after PR-head checkout (compose.lfs.yml now in ABRA_DIR), add compose.lfs.yml to COMPOSE_FILE and set SECRET_LFS_JWT_SECRET_VERSION=v1 so the upgrade chaos redeploy actually runs with LFS enabled. Without this, the base install checks out the 3.5.x tag (compose.lfs.yml removed), EXTRA_ENV sees no LFS, and the upgrade chaos redeploy inherits the no-LFS .env — so the LFS test runs (compose.lfs.yml is restored by recipe_checkout_ref) but LFS is off. - Add abra.secret_generate(domain) in generic.perform_upgrade when upgrade_env is non-empty — generates lfs_jwt_secret before chaos redeploy. Blocker 2 (REF=main upgrade fails HC1): - Always use recipe_head_commit (git rev-parse HEAD) for head_ref instead of using ref directly. When ref="main" (a branch name), the HC1 commit check "head_ref.startswith(chaos_commit)" always fails since "main" ≠ SHA. recipe_head_commit returns the actual SHA after the fetch/checkout. Side-fix (stale creds — build #675): - ops.py pre_install: delete the per-domain creds file before calling _ensure_admin. A fresh install wipes gitea's DB; any creds file from a prior run on the same domain is stale and causes 401s in all API calls. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>