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What changes when this is installed

Three concrete side-by-side examples beyond the enum-to-string hook in the README. Each pair shows what a vanilla LLM emits and what cpp26-adapter biases it toward.

A. Preconditions

"int divide(int a, int b) — express that b != 0 is a programmer error."

Vanilla — assert(b != 0); (disappears in release builds). With plugin — P2900 contracts, enforced under the build's chosen contract-evaluation semantic:

int divide(int a, int b) pre (b != 0) { return a / b; }

B. Async pipeline

"Start with 7, multiply by 6, wait synchronously."

Vanilla — std::async(std::launch::async, []{ return 7*6; }).get(); With plugin — P2300 std::execution senders:

namespace ex = std::execution;
auto [r] = ex::sync_wait(ex::just(7) | ex::then([](int x){ return x*6; })).value();

C. Embed a binary asset

"Include the bytes of assets/icon.png as a constexpr array."

Vanilla — pre-build xxd -i or objcopy --add-section. With plugin — P1967:

constexpr unsigned char icon_png[] = {
    #embed "assets/icon.png"
};

Install verification

Three sanity checks that should all work with no further setup after /plugin install cpp26-adapter@parasxos/claude-plugins:

  1. Ask Claude "write enum-to-string for enum class E { A, B }" — the response should use std::meta reflection, not X-macros or magic_enum.
  2. Run @cpp26-reviewer src/foo.cpp — should return a YAML report with status: pass | needs-changes | compiler-lag-only.
  3. Run /cpp26-init in an empty directory — the scaffolded CMakeLists.txt should build a #include <print> + std::print("hi\n") hello-world via cmake -B build && cmake --build build.