From 601e5008e730efe00b4ea2993964e21a8d77b70b Mon Sep 17 00:00:00 2001
From: Gagan Trivedi <gagandeeptrivedi47@gmail.com>
Date: Mon, 10 Aug 2026 19:22:32 +0530
Subject: [PATCH] feat!: declare MSRV 1.86 and enforce it in CI

The reqwest 0.13 bump (#49) raised the crate's effective MSRV: a fresh
resolve pulls icu_* 2.2.0 and idna_adapter 1.2.2 (via url -> idna),
which require rustc 1.86. Declare rust-version = "1.86.0" and add an
MSRV workflow so future dependency bumps cannot silently invalidate it.

BREAKING CHANGE: reqwest 0.13 changes the public API (reqwest::Error
From impl, http 1.x HeaderMap), switches the default TLS backend from
native-tls to rustls + aws-lc-rs, and requires rustc >= 1.86.
---
 .github/workflows/msrv.yml | 22 ++++++++++++++++++++++
 Cargo.toml                 |  1 +
 2 files changed, 23 insertions(+)
 create mode 100644 .github/workflows/msrv.yml

diff --git a/.github/workflows/msrv.yml b/.github/workflows/msrv.yml
new file mode 100644
index 0000000..bba8d4f
--- /dev/null
+++ b/.github/workflows/msrv.yml
@@ -0,0 +1,22 @@
+name: MSRV
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  msrv:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install MSRV toolchain
+      run: rustup toolchain install 1.86.0 --profile minimal
+    - name: Check with MSRV
+      run: cargo +1.86.0 check --verbose
diff --git a/Cargo.toml b/Cargo.toml
index 5cf558b..bedb274 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,7 @@ repository = "https://github.com/Flagsmith/flagsmith-rust-client"
 readme = "README.md"
 categories = ["config", "api-bindings"]
 keywords = ["Flagsmith", "feature-flag", "remote-config"]
+rust-version = "1.86.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html