From f8dbe893c39b9ca844a1bde923e62f7a1f99a743 Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Wed, 15 Mar 2023 11:42:21 -0700
Subject: Update PULL_REQUEST_TEMPLATE for 1.6.x

---
 .github/PULL_REQUEST_TEMPLATE.md | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 77abae1d..d592df60 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -1,3 +1,11 @@
+<!--
+
+********** NOTICE **********
+
+This repository is only accepting bug fixes
+
+-->
+
 ### Contributor Checklist
 
 - [ ] Did you add Scaladoc to every public function/method?
@@ -44,7 +52,7 @@ Text from here to the end of the body will be considered for inclusion in the re
 
 ### Reviewer Checklist (only modified by reviewer)
 - [ ] Did you add the appropriate labels?
-- [ ] Did you mark the proper milestone (1.2.x, 1.3.0, 1.4.0) ?
+- [ ] Did you mark the proper milestone (1.6.x, 1.5.x) ?
 - [ ] Did you review?
 - [ ] Did you check whether all relevant Contributor checkboxes have been checked?
 - [ ] Did you mark as `Please Merge`?
-- 
cgit v1.2.3


From 1144676e498141a554b40bc0cc5a1f551e7a0aa9 Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Wed, 15 Mar 2023 11:42:49 -0700
Subject: Add 1.6.x to CI

---
 .github/workflows/test.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 38febb1c..dff41ad2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,6 +5,7 @@ on:
   push:
     branches:
       - master
+      - 1.6.x
       - 1.5.x
       - 1.4.x
       - 1.3.x
-- 
cgit v1.2.3


From 7ea85f12f2f1780329787db4d6588f14c6ba069f Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Wed, 15 Mar 2023 11:47:51 -0700
Subject: Prepare Mergify for changing the default branch to 1.6.x

---
 .mergify.yml | 8 ++++----
 build.sbt    | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.mergify.yml b/.mergify.yml
index 89f935ff..d44ac038 100644
--- a/.mergify.yml
+++ b/.mergify.yml
@@ -8,7 +8,7 @@ pull_request_rules:
   - status-success=all tests passed
   - '#approved-reviews-by>=1'
   - '#changes-requested-reviews-by=0'
-  - base=master
+  - base=1.6.x
   - label="Please Merge"
   - label!="DO NOT MERGE"
   - label!="bp-conflict"
@@ -20,7 +20,7 @@ pull_request_rules:
 - name: backport to 1.5.x
   conditions:
   - merged
-  - base=master
+  - base=1.6.x
   - milestone=1.5.x
   actions:
     backport:
@@ -36,7 +36,7 @@ pull_request_rules:
 - name: backport to 1.4.x, 1.5.x
   conditions:
   - merged
-  - base=master
+  - base=1.6.x
   - milestone=1.4.x
   actions:
     backport:
@@ -53,7 +53,7 @@ pull_request_rules:
 - name: backport to 1.3.x, 1.4.x, 1.5.x
   conditions:
   - merged
-  - base=master
+  - base=1.6.x
   - milestone=1.3.x
   actions:
     backport:
diff --git a/build.sbt b/build.sbt
index 4c6c2456..3b3c41b8 100644
--- a/build.sbt
+++ b/build.sbt
@@ -152,7 +152,7 @@ lazy val docSettings = Seq(
     "-doc-source-url", {
       val branch =
         if (version.value.endsWith("-SNAPSHOT")) {
-          "master"
+          "1.6.x"
         } else {
           s"v${version.value}"
         }
-- 
cgit v1.2.3


From 288151eea1ce36d3dac306d0581a9fd88bfcac75 Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Wed, 15 Mar 2023 11:54:24 -0700
Subject: Update README for maintenance mode

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index 48b5d650..c24730fd 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,12 @@
+# This project is in maintenance mode
+
+Pull Requests should only be made for bug fixes against versions 1.6 and below (Chisel 3.6 and below).
+
+Please see [CIRCT](https://github.com/llvm/circt) for the next generation FIRRTL compiler.
+Also see [Chisel](https://github.com/chipsalliance/chisel).
+
+---
+
 ![FIRRTL](https://raw.githubusercontent.com/freechipsproject/firrtl/master/doc/images/firrtl_logo.svg?sanitize=true)
 
 ---
-- 
cgit v1.2.3


From 7262d5a538bd52850b90dd313757d3facb343b4a Mon Sep 17 00:00:00 2001
From: Jack Koenig
Date: Wed, 15 Mar 2023 11:54:46 -0700
Subject: Enable binary compatibility checking for 1.6.

---
 build.sbt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.sbt b/build.sbt
index 3b3c41b8..e6290b05 100644
--- a/build.sbt
+++ b/build.sbt
@@ -61,7 +61,7 @@ lazy val firrtlSettings = Seq(
 )
 
 lazy val mimaSettings = Seq(
-  mimaPreviousArtifacts := Set()
+  mimaPreviousArtifacts := Set("edu.berkeley.cs" %% "firrtl" % "1.6.0-RC2")
 )
 
 lazy val protobufSettings = Seq(
-- 
cgit v1.2.3