microsoft
diff --git a/‎.anvil.lock‎
Lines changed: 41 additions & 33 deletions b/‎.anvil.lock‎
Lines changed: 41 additions & 33 deletions
diff --git a/‎.anvil/container/Dockerfile‎
Lines changed: 0 additions & 1 deletion b/‎.anvil/container/Dockerfile‎
Lines changed: 0 additions & 1 deletion
diff --git a/‎.github/actions/anvil-setup/action.yml‎
Lines changed: 21 additions & 59 deletions b/‎.github/actions/anvil-setup/action.yml‎
Lines changed: 21 additions & 59 deletions
diff --git a/‎.github/workflows/anvil-pr-impl.yml‎
Lines changed: 27 additions & 0 deletions b/‎.github/workflows/anvil-pr-impl.yml‎
Lines changed: 27 additions & 0 deletions
@@ -1,7 +1,7 @@
 version = 1
 tool = "anvil"
 tool_version = "0.6.0"
-catalog_checksum = "sha256:7e4e7f7fa0e7f9491d3f5123f80ef209261e71b9cd9039e2f388e4287dc2f6bc"
+catalog_checksum = "sha256:411e8b3d247721c856c6a8a69f7b388711159325472ab687eff9c40bdd9727b0"
 
 [[file]]
 path = ".anvil/container/Dockerfile.dockerignore"
@@ -21,15 +21,15 @@ checksum = "sha256:ff8def6c0786b6e146c4b633dfe38cb9b8ede398345516cca32bbcd558608
 
 [[file]]
 path = ".github/actions/anvil-setup/action.yml"
-checksum = "sha256:3df22c126c79170d39c515a06b597a0c20a05a5803eacd38326f0fa63bea846b"
+checksum = "sha256:e1029f7ff95a5966184b4c04ccbed04ee8ba93bfc93bc9ac307d3dcef31374fb"
 
 [[file]]
 path = ".github/actions/anvil-setup/just-problem-matcher.json"
 checksum = "sha256:ea44d5e1a2cb1471cf2cef05eceab846d8afa45cf691be800f21fec1218da120"
 
 [[file]]
 path = ".github/workflows/anvil-pr-impl.yml"
-checksum = "sha256:518d267b6def1d2549800df52fbe32c5f0848b2b2d9c00d9480b86e07b54ee3a"
+checksum = "sha256:f69ff8d422152ec5b4e59d5905316be02ea5b054b8b16752e87aac3ae290a579"
 
 [[file]]
 path = ".github/workflows/anvil-pr.yml"
@@ -45,79 +45,79 @@ checksum = "sha256:d4d3bd645a5586e9a1cc3a5fc27e38c93e59b1e29f83ede0ccd610273eec0
 
 [[file]]
 path = "justfiles/anvil/checks/aprz.just"
-checksum = "sha256:0f9f3dd3c8a2f034ebf4f2ac0344cba3db79612ff2fc2ea037bfabbaacb1be12"
+checksum = "sha256:e10edbbe60358ec930241cd5d4e681a84f30f9d5278e652696e2f149e112d066"
 
 [[file]]
 path = "justfiles/anvil/checks/audit.just"
-checksum = "sha256:54abf96a320bb4b35a3c0ddf2f30b0f4a30e0673e482ca3a71242fa383536415"
+checksum = "sha256:ef33da620683628208b4c5ad51f96f5f6424fe1d56c2d0475487228b1f1aec23"
 
 [[file]]
 path = "justfiles/anvil/checks/bench.just"
-checksum = "sha256:50f04b4ea6c99df8ad7434d320f34dccdb6db6a77b83e3090e35de0ca3a15f83"
+checksum = "sha256:850793443ada2151a895ee2728e81f03da5430facde16522bcc2e0c314a28577"
 
 [[file]]
 path = "justfiles/anvil/checks/bolero.just"
-checksum = "sha256:754827bb664723169b8d48a6f1e69f9122b5440ba0b94a91622f4d23313e2503"
+checksum = "sha256:5a1767c4ff911cec3b0870d675cbefb563193146cedd3a1cbfe1667215bdb264"
 
 [[file]]
 path = "justfiles/anvil/checks/careful.just"
-checksum = "sha256:bf69fadd48df96f97640ec41eade07eb2b6916800014cb277c86208efc34396b"
+checksum = "sha256:ea06cf7ebd7d5955b409db500a9ab193311af584437412d7bf0429fa70e43fac"
 
 [[file]]
 path = "justfiles/anvil/checks/cargo-hack.just"
-checksum = "sha256:681c8952690496c7d29c7bf83a5ab99c193088b05a5dc7ea3b3b0ed2400904ea"
+checksum = "sha256:4eca78f197c2cf428b693c49cf0af4afb735b9c6caa8c83a71e5f5fd312a9bc1"
 
 [[file]]
 path = "justfiles/anvil/checks/cargo-sort.just"
-checksum = "sha256:98c9f90e1b6b3beba5d818bf9a4023068eb61e9f071ffb6f9cd009a7374e9a30"
+checksum = "sha256:ab342c014199ffb58a9346b7b9fcea88201b5b60a07b06cbc9c4e5ef03bd18f5"
 
 [[file]]
 path = "justfiles/anvil/checks/clippy.just"
-checksum = "sha256:64e8f11ed1a308797e5599117ab6152d0ca3a1dfb55e6a4cfdd42d35de13e1e2"
+checksum = "sha256:945a1bf3bb1372b2bfbbfec00d520a97da56ebc5575b1e6292c421b52cc77243"
 
 [[file]]
 path = "justfiles/anvil/checks/deny.just"
-checksum = "sha256:4bb4bc0822612e2d2a43689e3f5c7f1190f59ef3db201fad7f3332725ceaef16"
+checksum = "sha256:c5604e8cb0eaa2baf4e2e2c70032d037d21873090375ffcf1ee99983965f6635"
 
 [[file]]
 path = "justfiles/anvil/checks/doc-build.just"
-checksum = "sha256:57bf3ce93d3e7b947cb203f85b572531b86706ed2437ce3098f086745bf5d111"
+checksum = "sha256:9e187f61cb1ef9d11fab2e402af8a882b77f6ed17ca332afb9ae0b1d2112e95b"
 
 [[file]]
 path = "justfiles/anvil/checks/doc-test.just"
-checksum = "sha256:e923667a5ceb376232db02ec41824d21f2fccffd041565109f7740c001c1c23d"
+checksum = "sha256:0e54c767de8e57a523a8b1b589a88ab6aca3169ac97d157c42d509d429f4b024"
 
 [[file]]
 path = "justfiles/anvil/checks/ensure-no-cyclic-deps.just"
-checksum = "sha256:7351afd07f020f04fa6c7c82d4740ef32cbb1b648550f0a5ff306af6a5d58588"
+checksum = "sha256:2d19930c33a93b49d0c9e9672a31d85e1ad4fb92faecc0fb599803139b11c18f"
 
 [[file]]
 path = "justfiles/anvil/checks/ensure-no-default-features.just"
-checksum = "sha256:25c61d31ea76c5e65b5c3caf744ddc9b49f6f9cdf9717b012d1d82cebfe555b9"
+checksum = "sha256:38e089afe176aea92c93ac6758154b206b6fc8940931035c0d059449fa824d6c"
 
 [[file]]
 path = "justfiles/anvil/checks/examples.just"
-checksum = "sha256:0e84a7b43ff07608c624ece03d46ddd58c629ebd5f6a5684f3b43b7190026e0f"
+checksum = "sha256:8d01fa3e303a9f2b768213636f12c68cc8b41932b68549239e9f10d3be43507b"
 
 [[file]]
 path = "justfiles/anvil/checks/external-types.just"
-checksum = "sha256:d003f1d82898706c136f42c3156d5ecc8f288c18f125c964b9dca1d24fa93d67"
+checksum = "sha256:7e67d90a9d8bd8cd5c8adb68baf41fdd4625bff4d425b5bf18b75baee62892a8"
 
 [[file]]
 path = "justfiles/anvil/checks/fmt.just"
-checksum = "sha256:618907282b9b7d1e5c094d0b29c1c7231465078b617fa233219fe8c4870437cb"
+checksum = "sha256:0434e1a8720453a4bc635ea56af1d19875ac79e6fdd76349052cd57e70392eb8"
 
 [[file]]
 path = "justfiles/anvil/checks/license-headers.just"
-checksum = "sha256:ab9ef6c3b50475ff3a8ab873b319f1ec04c456275d566ce323a76730be3ad0fc"
+checksum = "sha256:7aa0560dc9088b33e80cd55aee0a25090cbd3d3610652afd3734d0ca52ee7b47"
 
 [[file]]
 path = "justfiles/anvil/checks/llvm-cov.just"
-checksum = "sha256:689f7d5b1eaea32672f8d0b9fff0994cc03bc56fb8ef282a4286f930fc503725"
+checksum = "sha256:cb23283ac3d377b1219c904f4de93b05b437b48c93629fec617307914bba6296"
 
 [[file]]
 path = "justfiles/anvil/checks/loom.just"
-checksum = "sha256:a919429e9693c230ba8c9a194c41127708acf2cb1bfd196049a1386e7bb7b4e4"
+checksum = "sha256:f4822a8f9cb282bc426790355ba83b63e778db9327e986ba3c86ae6205cfdabb"
 
 [[file]]
 path = "justfiles/anvil/checks/miri-race-coverage.just"
@@ -135,29 +135,33 @@ checksum = "sha256:c82f586402f2cb05397a40eec6fe95c7590df2cc52f0dd9da6879de085175
 path = "justfiles/anvil/checks/miri.just"
 checksum = "sha256:9e9d0cbfef1e1e1586c2af4e9c387719c2f017ea1203d326baacc3ae25df80e2"
 
+[[file]]
+path = "justfiles/anvil/checks/msrv-test.just"
+checksum = "sha256:9c25b140dcaa4b38db7701fd627dd9a2d5ad5f9bb83d4490c146058bf4328cc8"
+
 [[file]]
 path = "justfiles/anvil/checks/mutants-diff.just"
-checksum = "sha256:d13b1c467b8899d54e3567cb8d1a2157c4a54ac7ba9dabc00a09f3105fddb9b4"
+checksum = "sha256:e8d23688dcb86f82bf537e82c35ab8af9296d5530898645ddfe95132f9192bd0"
 
 [[file]]
 path = "justfiles/anvil/checks/mutants-full.just"
-checksum = "sha256:9792344e6696f5c63f30fdccb5ef90a3598c56adb7561cec33f074c84ce6f89b"
+checksum = "sha256:604dfb6aa2742695ff638a7d2db6811a1bcbf27da73660027baacc86b2fe1509"
 
 [[file]]
 path = "justfiles/anvil/checks/pr-title.just"
 checksum = "sha256:28734aa77526ca5c53d89a32c3e20ae6b42d2032c73ab6a1dbc9831f25cb0f76"
 
 [[file]]
 path = "justfiles/anvil/checks/readme-check.just"
-checksum = "sha256:6d4b4c3e4a59e825a3f613e1011272c711d8d6cbdef315e5f6aadf653c6ae206"
+checksum = "sha256:4993e662875561ddf976ec94c69ec0d647a5c957bfb8f5174f79162a640ed892"
 
 [[file]]
 path = "justfiles/anvil/checks/semver-check.just"
-checksum = "sha256:b214a8abbf2895df838ac1ff06c11bec4e8b8b3105c2cc4c0982a8a13414abd1"
+checksum = "sha256:be0430a53007301db00602d4bc9296f51ad9b2f011583084d069c51b30939b74"
 
 [[file]]
 path = "justfiles/anvil/checks/spellcheck.just"
-checksum = "sha256:8f47518b756607402a7b3652762d5d37cff5d91eecd1052053176eedd65a9958"
+checksum = "sha256:2b2063f7e494dba51f805534bce5235132be1eeabde3a118d42d87ce49d51fd6"
 
 [[file]]
 path = "justfiles/anvil/checks/udeps.just"
@@ -171,6 +175,10 @@ checksum = "sha256:3363992c6c006c649eae3732b2a7b04c2a4925eff369179b128d43380e280
 path = "justfiles/anvil/groups/pr-fast.just"
 checksum = "sha256:29a219b7d8b2eaa605b0444838f05ffc7538ab8bccc43d1613c555f7562a731f"
 
+[[file]]
+path = "justfiles/anvil/groups/pr-msrv.just"
+checksum = "sha256:5c862a1c7775742377e75d6848650070d11e9ce3facd9ab304b03dbca1c4b1d2"
+
 [[file]]
 path = "justfiles/anvil/groups/pr-mutants.just"
 checksum = "sha256:19a5fb032f680eee2d2e4eca56dece0ced80ac15bd2332b8135915d884f804a1"
@@ -181,7 +189,7 @@ checksum = "sha256:9a94b6ae2d212f91d324e401ebdb2238805f3450d95d4d45df791d7f1679a
 
 [[file]]
 path = "justfiles/anvil/groups/pr-slow.just"
-checksum = "sha256:8b7c490cb6eb20c31549ef71eb75eac86ae145c8c6380ee1f590ccd81eec48ea"
+checksum = "sha256:c3281f2044494dcfcfa7544b022ce3d751444241d93d3e8f136669d72d102528"
 
 [[file]]
 path = "justfiles/anvil/groups/pr-test.just"
@@ -209,23 +217,23 @@ checksum = "sha256:dc42a4b2ed4a25e3a37b322dad209df34d7adca88bf3c4de60b2f8c1b396e
 
 [[file]]
 path = "justfiles/anvil/impact.just"
-checksum = "sha256:5714a138135154b91b234f6bad06ec3ade0e5780f761d631c1eca92b6010e5ad"
+checksum = "sha256:0b3a5c96dd33384b4c86ac02b17396bc1a9fe9c82edbc516a2ceea7f4fe3833d"
 
 [[file]]
 path = "justfiles/anvil/mod.just"
-checksum = "sha256:2f7f0187f8c45716a1bed85f0c45ffbc71cdf592ed6414c9bc4cd72cf716a3a5"
+checksum = "sha256:4892e7a17d5f576241834041c89916708b23e88503156721af3048b2a358538f"
 
 [[file]]
 path = "justfiles/anvil/tiers.just"
 checksum = "sha256:00453a12cbb34811ee6a2c083dade5f6198575e3b0610f49e4743366326cdd18"
 
 [[file]]
 path = "justfiles/anvil/tools.just"
-checksum = "sha256:c1f5181d14a734cde8ccc32bbf5acece485791573b7a95cfff61b63d0f1fcb97"
+checksum = "sha256:48b887481a7eb8dc7615367347c93b8a02dd7baafb0ef80ece883f03600285dd"
 
 [[file]]
 path = "justfiles/anvil/versions.just"
-checksum = "sha256:b48c7a29f694acdc4ff02a15bfdae5a286c1d0b6272fffad3acefbd8b1f2dcaa"
+checksum = "sha256:ae6676fb883aa58adb0995384adef477957ad7df10fc43439517cfb617fd92d1"
 
 [[region]]
 host = ".anvil/container/Dockerfile"
@@ -250,7 +258,7 @@ checksum = "sha256:3788845ea3d4c483917954ddf9bccf918bf69ab7c64bbf559baf59d5781c4
 [[region]]
 host = ".anvil/container/Dockerfile"
 id = "anvil-container-tools"
-checksum = "sha256:0b6923e81ec99170ece298fcd9ef875f26a3ff018708ce5ec21b4b1dd7a18900"
+checksum = "sha256:ba7456ca88da39f72024dd0616e56d49d1aef7a5d26b81a8b33efccb13321379"
 
 [[region]]
 host = ".delta.toml"
 
@@ -75,7 +75,6 @@ RUN curl -fsSLo /tmp/cargo-binstall.tgz \
     && tar -xzf /tmp/cargo-binstall.tgz -C "${CARGO_HOME}/bin" cargo-binstall \
     && chmod 755 "${CARGO_HOME}/bin/cargo-binstall" \
     && rm /tmp/cargo-binstall.tgz
-
 # <<< anvil-managed: anvil-container-tools
 
 # >>> anvil-managed: anvil-container-setup
 
@@ -13,8 +13,8 @@ inputs:
         - "" (default): install the full catalog via
           `just anvil-setup` -- use for local "give me everything"
           flows.
-        - "none": skip tool installation entirely; just bootstrap the
-          rust toolchain + just + binstall + cache. Used by
+        - "none": skip tool installation entirely; just restore the
+          Cargo cache and bootstrap just + binstall. Used by
           anvil-impact, which installs only cargo-delta afterwards.
         - a name containing only lowercase letters, digits, and hyphens:
           install only that group's prerequisites via
@@ -77,80 +77,37 @@ runs:
         }
         "Free after cleanup (GiB): $(Get-FreeDiskGiB)"
 
-    - id: rustc-version
-      shell: bash
-      run: echo "version=$(rustc --version | awk '{print $2}')" >> "$GITHUB_OUTPUT"
+    # Restore before bootstrapping Just so a warm job can reuse the cached
+    # executable. Repository toolchain files intentionally define a fresh
+    # cache generation, bounding registry growth without invalidating on
+    # routine Cargo.toml or Cargo.lock edits.
     - name: Restore cargo cache
       id: cargo-cache
       uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
       with:
-        # Key on OS + arch + rustc version + lockfile hashes + catalog
-        # hash so a Rust toolchain bump, a cross-arch matrix leg, or a
-        # tool-versions update all invalidate the cache cleanly.
-        # runner.arch resolves to X64 / ARM64 / X86, which keeps the
-        # x86_64 and aarch64 legs of the same OS from colliding on
-        # arch-incompatible cached binaries in ~/.cargo/bin.
-        #
-        # ${{ github.job }} discriminates by workflow-job-id (`pr-fast`,
-        # `pr-test`, `pr-slow`, etc.) so concurrent matrix legs that
-        # share OS+arch (e.g. pr-fast linux + pr-test linux) don't race
-        # on the same cache key. Without this, the first-to-finish job
-        # reserves the key, the others get "Unable to reserve cache:
-        # another job may be creating this cache" and silently skip
-        # the save -- leaving the cache empty forever. The restore-keys
-        # fall back across jobs so the install work is still shared
-        # across sibling legs on subsequent runs.
-        key: anvil-v1-${{ runner.os }}-${{ runner.arch }}-rust${{ steps.rustc-version.outputs.version }}-${{ hashFiles('Cargo.lock', '.cargo/config.toml', 'rust-toolchain.toml', 'justfiles/anvil/versions.just') }}-${{ github.job }}
+        # The job suffix prevents concurrent matrix jobs from racing to save
+        # one key. The prefix shares a completed cache across sibling jobs.
+        # There is deliberately no fallback across toolchain/catalog changes:
+        # those inputs are the cache-pruning boundary.
+        key: anvil-v2-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('.cargo/config.toml', 'rust-toolchain', 'rust-toolchain.toml', 'justfiles/anvil/versions.just') }}-${{ github.job }}
         restore-keys: |
-          anvil-v1-${{ runner.os }}-${{ runner.arch }}-rust${{ steps.rustc-version.outputs.version }}-${{ hashFiles('Cargo.lock', '.cargo/config.toml', 'rust-toolchain.toml', 'justfiles/anvil/versions.just') }}-
-          anvil-v1-${{ runner.os }}-${{ runner.arch }}-rust${{ steps.rustc-version.outputs.version }}-
-          anvil-v1-${{ runner.os }}-${{ runner.arch }}-
+          anvil-v2-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('.cargo/config.toml', 'rust-toolchain', 'rust-toolchain.toml', 'justfiles/anvil/versions.just') }}-
         # `.crates.toml` and `.crates2.json` track which cargo-installed
         # tools and versions live in ~/.cargo/bin/. Without them in the
         # cache, `cargo install --list` and (downstream) the
         # tool-install recipes' early-skip on "installed >= pin" don't
-        # see the cached binaries — every run then tries to reinstall
-        # on top of them and fails with "binary X already exists in
-        # destination".
+        # see the cached binaries.
         #
-        # target/ (the compilation output dir) is deliberately NOT cached here:
-        # per the GitHub backend design's caching policy, multi-GB per-job
-        # target/ trees dwarf the high-value tool cache under the repo cache
-        # quota, give only modest recompile savings once tools are cached, and
-        # could overwrite the downloaded target/anvil/impact/ cache. Only the
-        # ~/.cargo tool + registry state below is cached.
+        # target/ is deliberately excluded: per-job target trees dwarf the
+        # tool cache and could overwrite the downloaded impact cache.
         path: |
           ~/.cargo/registry/cache/
           ~/.cargo/registry/index/
           ~/.cargo/bin/
           ~/.cargo/.crates.toml
           ~/.cargo/.crates2.json
 
-    # rustup auto-installs the toolchain from rust-toolchain.toml on
-    # first cargo invocation, but it doesn't pull profile/component
-    # extras. The `anvil-setup` recipe in step "Install anvil
-    # toolchains + tools" below handles that exhaustively (the
-    # per-component install recipes in tools.just install
-    # default-toolchain components and pinned-nightly components for
-    # miri/careful/etc.) -- we don't add components inline here anymore.
-    # This step exists only to ensure rustup itself has the default
-    # toolchain set up so subsequent cargo / just calls work.
-    - name: Ensure default toolchain is installed
-      shell: bash
-      run: rustup show active-toolchain || rustup default stable
-
-    # The catalog recipe `anvil-setup` (or `anvil-<group>-setup`
-    # when a group is specified via the `group` input) needs `just` to
-    # run. We bootstrap just here (chicken-and-egg), then hand off
-    # everything else to it. The setup recipes are idempotent and
-    # short-circuit on tools already installed at or above the pinned
-    # version, so re-running on cache-hit runs is cheap.
-    # Install a prebuilt cargo-binstall binary in seconds. Without this,
-    # the first `_install-tool` recipe that needs binstall bootstraps it
-    # via `cargo install --locked cargo-binstall`, which takes ~4 min of
-    # source compilation on every cold-cache job. The official action
-    # downloads the release binary from cargo-bins/cargo-binstall, so
-    # the bootstrap branch in `tools.just` becomes a no-op on GH.
+    # cargo-binstall keeps the cold bootstrap path fast.
     - name: Install cargo-binstall
       uses: cargo-bins/cargo-binstall@v1.21.0 # immutable release, the tag cannot be moved
 
@@ -161,6 +118,11 @@ runs:
           cargo binstall --no-confirm --locked just || cargo install --locked just
         fi
 
+    # The catalog recipe `anvil-setup` (or `anvil-<group>-setup`
+    # when a group is specified via the `group` input) uses the Just executable
+    # bootstrapped above, then handles everything else. The setup recipes are idempotent and
+    # short-circuit on tools already installed at or above the pinned
+    # version, so re-running on cache-hit runs is cheap.
     - name: Install anvil toolchains + tools
       shell: bash
       # Carry action data through the environment instead of interpolating it
 
@@ -222,6 +222,33 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: false
 
+  pr-msrv:
+    name: "Check Group: MSRV Tests (${{ matrix.os }})"
+    needs: [impact-linux, impact-windows]
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [linux, windows, linux-arm, windows-arm]
+    runs-on: ${{ matrix.os == 'linux' && inputs.linux_runner
+      || matrix.os == 'windows' && inputs.windows_runner
+      || matrix.os == 'linux-arm' && inputs.linux_arm_runner
+      || inputs.windows_arm_runner }}
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          lfs: true
+      - name: Download impact artifact
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+        with:
+          name: anvil-impact-${{ startsWith(matrix.os, 'linux') && 'Linux' || 'Windows' }}
+          path: target/anvil/impact
+      - uses: ./.github/actions/anvil-run-group
+        with:
+          group: pr-msrv
+          publish_commit_statuses: ${{ inputs.publish_commit_statuses }}
+          free-disk-space: true
+          impact_mode: consume
+
   pr-runtime-analysis:
     name: "Check Group: Runtime Analysis (${{ matrix.os }})"
     # Stricter-runtime correctness: miri + careful.