diff --git a/.github/codecov.yml b/.github/codecov.yml
new file mode 100644
index 0000000..69cb760
--- /dev/null
+++ b/.github/codecov.yml
@@ -0,0 +1 @@
+comment: false
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 93b9264..da525ad 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -76,20 +76,10 @@ jobs:
     - name: make coverage
       run: |
         CXX=clang++-10 make -j2 config=coverage coverage
-    - name: debug coverage
-      run: |
-        git status
-        git log -5
-        echo SHA: $GITHUB_SHA
     - name: upload coverage
-      uses: coverallsapp/github-action@master
+      uses: codecov/codecov-action@v3
       with:
-        path-to-lcov: ./coverage.info
-        github-token: ${{ secrets.GITHUB_TOKEN }}
-    - uses: actions/upload-artifact@v2
-      with:
-        name: coverage
-        path: coverage
+        files: ./coverage.info
 
   web:
     runs-on: ubuntu-latest
diff --git a/README.md b/README.md
index 2ed7348..2b44c89 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Luau ![CI](https://github.com/Roblox/luau/workflows/build/badge.svg) [![Coverage](https://coveralls.io/repos/github/Roblox/luau/badge.svg?branch=master&t=2PXMow)](https://coveralls.io/github/Roblox/luau?branch=master)
+Luau ![CI](https://github.com/Roblox/luau/workflows/build/badge.svg) [![codecov](https://codecov.io/gh/Roblox/luau/branch/master/graph/badge.svg?token=S3U44WN416)](https://codecov.io/gh/Roblox/luau)
 ====
 
 Luau (lowercase u, /ˈlu.aʊ/) is a fast, small, safe, gradually typed embeddable scripting language derived from [Lua](https://lua.org).
diff --git a/docs/_pages/library.md b/docs/_pages/library.md
index 6ca2c05..d82b6f2 100644
--- a/docs/_pages/library.md
+++ b/docs/_pages/library.md
@@ -360,7 +360,7 @@ Returns `-1` if `n` is negative, `1` if `n` is positive, and `0` if `n` is zero
 function math.round(n: number): number
 ```
 
-Rounds `n` to the nearest integer boundary.
+Rounds `n` to the nearest integer boundary. If `n` is exactly halfway between two integers, rounds `n` away from 0.
 
 ## table library
 
diff --git a/rfcs/README.md b/rfcs/README.md
index f6c4c14..4b5e7b0 100644
--- a/rfcs/README.md
+++ b/rfcs/README.md
@@ -18,6 +18,13 @@ For changes in semantics, we should be asking:
 - Can it be sandboxed assuming malicious usage?
 - Is it compatible with type checking and other forms of static analysis?
 
+For new standard library functions, we should be asking:
+
+- Is the new functionality used/useful often enough in existing code?
+- Does the standard library implementation carry important performance benefits that can't be achieved in user code?
+- Is the behavior general and unambiguous, as opposed to solving a problem / providing an interface that's too specific?
+- Is the function interface amenable to type checking / linting?
+
 In addition to these questions, we also need to consider that every addition carries a cost, and too many features will result in a language that is harder to learn, harder to implement and ensure consistent implementation quality throughout, slower, etc. In addition, any language is greater than the sum of its parts and features often have non-intuitive interactions with each other.
 
 Since reversing these decisions is incredibly costly and can be impossible due to backwards compatibility implications, all user facing changes to Luau language and core libraries must go through an RFC process.