docs(readme): add 'Why Rust, not Python' paragraph in author note

README.md

@@ -12,6 +12,8 @@ I work across 4 to 8 parallel Claude terminals most days. The problems I hit are
 
 Most of what is here is well-established bricks (git-as-state, cron, TF-IDF, constructor-pattern composition). What may be new in the Claude Code context is the Constructor Pattern for agents (composable blocks, deterministic build, rebuild-on-block-edit hooks) and sleep-sync (using a git repo as the transport layer between sessions, with an Anthropic-cloud agent doing nightly REM-style consolidation).
 
+**Why Rust, not Python.** Transformers write Python confidently and wrongly. Five minutes to a plausible-looking function, two hours to debug why `dict.get("key", None) or []` silently swallowed an empty list, or why an async context manager leaked a file handle across a retry loop. Rust's type system catches whole categories of those errors at compile-time — the model literally cannot ship a `None`-vs-`[]` confusion, a missing `.await`, or an unhandled `Result`, because the compiler refuses. For an LLM-written codebase this is not aesthetic preference, it is survival. Every Rust primitive here is one category of hallucination the transformer is no longer allowed to commit.
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 It is not a product. It helps me personally. If it resonates with you, let me know. If enough feedback comes in, there will be a next version — more primitives, more patterns against the "forgetful" transformer. But that needs input; without it, I just keep using this quietly myself.
 
 Forks and PRs welcome from everyone, not only from those who write code. If you hit a problem with Claude Code and have an idea for solving it, open an issue with the description. A well-formulated problem is already half the solution.