From 797b4ef26338e27363683656f93cb065a77daa0e Mon Sep 17 00:00:00 2001
From: mrwulf <mrwulf.cleaner@gmail.com>
Date: Fri, 24 Jul 2026 19:08:47 +0200
Subject: [PATCH] reproducibility: commit Cargo.lock + pin rust-toolchain
 (review round 2)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

External review round 2 (GPT B1.5) flagged that no Cargo.lock was committed
and the extraction toolchain was undocumented. Fixes:

- Un-ignore and commit Cargo.lock (this is a verification-pinned snapshot, not
  a library — a locked dependency graph is part of the reproducible artifact).
- Add rust-toolchain.toml pinning nightly-2026-06-01, the exact channel the
  Charon/Aeneas transpiler uses, so `charon cargo` extraction and the `cargo
  test` differential harness agree on one compiler.

Verified: re-running verification/extract.sh against this tree reproduces
gen/SlhVerify/{Types,Funs}.lean BYTE-IDENTICALLY (sha256 unchanged) — these
additions do not perturb the extracted Lean model.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 .gitignore          |   1 -
 Cargo.lock          | 818 ++++++++++++++++++++++++++++++++++++++++++++
 rust-toolchain.toml |   6 +
 3 files changed, 824 insertions(+), 1 deletion(-)
 create mode 100644 Cargo.lock
 create mode 100644 rust-toolchain.toml

diff --git a/.gitignore b/.gitignore
index c64351b..f1e9203 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,6 @@
 **/corpus
 **/target
 /fuzz/.gitignore
-**/Cargo.lock
 **/package-lock.json
 **/node_modules
 **/pkg
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..c3c5900
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,818 @@
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diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..4391e70
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,6 @@
+# Pinned to the exact nightly the Charon/Aeneas transpiler uses (see
+# aeneas-toolchain/aeneas/charon/rust-toolchain). This aligns `charon cargo`
+# extraction and the `cargo test` differential harness on one compiler, and
+# documents the toolchain for reproducible regeneration of the Lean model.
+[toolchain]
+channel = "nightly-2026-06-01"