Claude Sonnet 5.5 (effort default (no --effort flag) · thinking on) on Fix cache invalidation in an incremental static-site builder (transitive partials, config, deletions, same-second edits)

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  "result": "I rewrote `build()` in `minibuild.py` so `out/` always matches a clean full build. It no longer relies on source mtimes. I ran it by hand on the sample site, but I haven't run the grader or a full set of change scenarios.\n\n- **How it works:** every build renders each page in memory, which covers indirect partials, `config.json` and same-second edits. It then compares a SHA-256 of the new output with the file on disk. The file is rewritten only if it's missing or different, and `build()` returns just those names. That check uses content, so it doesn't matter that the grader resets timestamps. A deleted or hand-edited output file is repaired the same way.\n- **Config keys:** a config change rebuilds only pages whose output actually changes, because the comparison is on the rendered bytes. `site_title` therefore hits every page, and `{{var KEY}}` hits only the pages that use it, directly or through partials.\n- **Deleted pages:** anything in `out/` that isn't `<page>.html` for a current source page is removed, including stray files and directories.\n- **Cache:** `.cache.json` now just records each page's output hash. The build doesn't read it, so a missing or corrupt cache can't cause stale pages.\n- **Cost:** it re-renders every page on each run, so it saves disk writes rather than rendering time. That's cheap for markdown this size.\n- **Unchanged:** rendering and the command line are the same. The only change to the output is that files are written as UTF-8, where before they used the locale default. They are still read with the default encoding.\n\nOn the sample site:\n\n- A second build rewrote nothing.\n- Editing the `footer` partial rebuilt only `about` and `index`.\n- A deleted `out/blog.html` came back.\n- A stray `out/zz` file was removed.\n\nI also appended a line to `site/partials/footer.md` for the test and removed it afterwards. That last build rewrote `about` and `index` again to undo it.",
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