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#3127 checklist 19. The step's own deletion list turned out to be largely spent: `check_version_bump()` came out with #3327, and the machinery the step expected to delete alongside it is load-bearing for its replacement. `manifest_version(ref=…)`, `--base`, `--no-version` and the `origin/main` resolve path all STAY. Derivation makes the value right; it does not make the comparison unnecessary. `check_version_is_minted` still has to ask "did the version move when the shipped content did?", and that is a base-branch question no matter who chose the number. The step was planned before #3327 landed, when the assumption was that these died with the guard. What was actually still standing, all of it teaching or asserting the retired scheme: - `plugin/README.md` told the reader to "set a `version` bump per release." A shipped file, instructing the exact act the mint replaced — this is how a deleted control gets re-added by someone following the docs. Now says not to hand-edit the field, names `make mint-plugin`, and says what a forgotten mint costs. (`make` is not installed on every workstation, so the direct script invocation is given too.) - `test_plugin_version_bumped_with_the_hook` asserted `version >= (0,1,31)` as a tuple of ints. Under a minted value it passes vacuously — every date clears a floor of 0.1.31 — and `int("0415")` silently eats the padding the format exists to keep. Superseded by `test_the_shipped_manifest_carries_a_minted_version`, which asserts the canonical shape instead of an ordering the comparator does not perform. Removed whole (rule 22). - The module preamble still ended on "a written rule that depends on being remembered is not a control; this is" — true of the bump guard, and read as a stronger claim than the mint can support. Replaced with what the change did and did not remove: choosing a number is gone, running the mint is not, and the difference is that forgetting is now loud rather than silent. - An orphaned `# --- the version bump ---` section header with nothing under it, and a test docstring still naming `check_version_bump`. `--no-version` keeps its one legitimate case — on `main` the version is measured against itself — and now says so in both the usage block and its `--help`, so it does not read as an escape hatch. `check_session_context_ reports_its_version` stays untouched: a different check with a different job, and the only thing that makes step 6 readable from a transcript (#2220). Version minted 2026.09.02.0415 -> 2026.09.02.0438 for the README change. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TcCs1CcQ1ormdnzSshKqvN