PR-Bld-C in the mirror of OpenIPC/firmware's nightly redesign. Mirrors OpenIPC/firmware#2116. Adds an optional `commit` workflow_- dispatch input to `build-one.yml` so: - `gh workflow run build-one.yml -f platform=X -f commit=<sha>` builds the given SHA from `git bisect run`. - Output goes to `nightly-bisect-<short>` (prerelease) tag, distinct from the dated `nightly-YYYYMMDD-<short>` namespace produced by PR-Bld-A's master.yml. The manifest aggregator's regex only indexes `^nightly-[0-9]{8}-[0-9a-f]{7}$`, so one-off bisect rebuilds never enter manifest.{json,flat}. - Without `commit`, falls back to building HEAD and tags as `nightly-bisect-<short>-<UTC ts>` so repeated dispatches of the same HEAD don't collide. Also: - Retry budget around `bash builder.sh` matching master.yml + OpenIPC/firmware#2129's hardening. - BUILD_ID / BUILD_SHA / BUILD_PLATFORM env at the Build firmware step level (forward-compat with Phase 3 of the mirror plan). - Drops dead `env: TAG_NAME: latest` at workflow level. - Release body carries sha/short/platform/one_off=true for the aggregator's downstream consumers to easily distinguish bisect builds from dated nightlies. See ~/.claude/plans/mirror-nightly-redesign-to-builder.md. Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>