## Why
The daily **Bump** job (`runs/107` and every other scheduled run) does ~5–26 min
of work on every run before it ever checks whether a bump is needed — and on the
common no-op day it isn't. Timeline of a no-op run:
`docker pull stage3` → `emerge-webrsync` → **`emerge … dev-lang/go dev-util/pkgdev` (29 pkgs)** → `bump-version.sh` finds `already at latest` and exits in **1 second**.
`go`/`pkgdev`/`xz`/`jq` are only needed when a bump actually happens. Recent
no-op scheduled runs took 5m, 26m, 9m, 5m, 10m — all to do nothing.
Separately, the log on every emerge was flooded with binpkg GPG failures
(`unknown key`, `pubring.kbx: No such file`, `Try running getuto`). The
`sed 's/^verify-signature = true/.../'` matched nothing in the stage3 binhost
config, so the intended "disable binpkg signature verification" never took
effect (it worked anyway only because the failures are non-fatal).
## What
- **`bump.yaml`**: add a cheap `Check whether a bump is needed` step that compares
the newest upstream release (`releases.rss`) against the newest committed ebuild
(Gitea contents API) using only base-image `wget`, and gate `Sync ::gentoo`,
the toolchain install, and the bump step on its `needed` output. The gate only
short-circuits when **confident** (both versions parsed and current ≥ upstream);
on any doubt — failed fetch, unparseable version — it falls through to the full
run, where `bump-version.sh` remains the source of truth and re-checks.
- **`bump.yaml` + `ci.yaml`**: replace the no-op `sed` with `sed -i '/^verify-signature/d'`
+ append `verify-signature = false`, so the knob is actually set regardless of
the stage3 default contents.
## Notes / limits
- The job `container:` still pulls `gentoo/stage3` before the gate runs, so the
~3.5 min image pull on no-op days is unchanged; this saves the larger
webrsync + 29-package emerge. A follow-up could split the gate into a separate
container-less job to skip the pull too, but that depends on what the runner
maps `runs-on: ubuntu-latest` to, so it's left out here.
- Validated: `yamllint -c .yamllint.yaml` clean on both files; version-comparison
logic and the contents-API JSON parsing unit-tested locally (equal / upstream-newer /
current-ahead / parse-failure cases).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: #4
Co-authored-by: Ali Zein Yousuf <azy5030@gmail.com>
Co-committed-by: Ali Zein Yousuf <azy5030@gmail.com>
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