chore: add reviewfixer configs

Change-Id: I4caa6d010f8f824aff1c38a7a73d08d47b400cce
Signed-off-by: Thomas Kosiewski <tk@coder.com>

Author: ThomasK33

flake.lock

@@ -3,11 +3,14 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    # Separate, fresh nixpkgs pin used only to build reviewfixer, which
+    # requires Go >= 1.26.2 (newer than the main pin currently provides).
+    nixpkgs-go.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
     treefmt-nix.url = "github:numtide/treefmt-nix";
   };
 
-  outputs = { self, nixpkgs, flake-utils, treefmt-nix, ... }:
+  outputs = { self, nixpkgs, nixpkgs-go, flake-utils, treefmt-nix, ... }:
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs {
@@ -18,6 +21,33 @@
           ];
         };
 
+        pkgsGo = import nixpkgs-go { inherit system; };
+
+        reviewfixer = pkgsGo.buildGoModule rec {
+          pname = "reviewfixer";
+          version = "0.1.0-beta.0";
+
+          src = pkgsGo.fetchFromGitHub {
+            owner = "ThomasK33";
+            repo = "reviewfixer";
+            rev = "v${version}";
+            hash = "sha256-hrnSm7ttpyUAtkre9micI2n9smKgzX5AmUcj3bJQjbU=";
+          };
+
+          vendorHash = "sha256-yIWbmHFxmOeXBm5TMRsupy33DC6VAUYvZNSz5wa1yxA=";
+
+          # Upstream tests shell out to `git`, which isn't available in the
+          # Nix build sandbox. Skip the test phase here.
+          doCheck = false;
+
+          meta = with pkgsGo.lib; {
+            description = "Local harness for working through review feedback on Graphite-managed stacked PRs";
+            homepage = "https://github.com/ThomasK33/reviewfixer";
+            license = licenses.mit;
+            mainProgram = "reviewfixer";
+          };
+        };
+
         treefmt = treefmt-nix.lib.evalModule pkgs {
           projectRootFile = "flake.nix";
           programs = {
@@ -56,6 +86,7 @@
           websocat
           jq
           fzf
+          reviewfixer
           # claude-code
         ];
       in

flake.nix

@@ -0,0 +1,31 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/ThomasK33/reviewfixer/refs/heads/main/reviewfixer.schema.json
+# Config for running reviewfixer against the Claude ACP adapter.
+#
+# Prerequisites:
+# - `node` and `npm`/`npx` available on PATH
+# - `ANTHROPIC_API_KEY` exported in the shell that launches reviewfixer
+#
+# Usage:
+#   reviewfixer validate --config ./reviewfixer.yaml
+#   reviewfixer --config ./reviewfixer.yaml
+#   reviewfixer run --config ./reviewfixer.yaml
+#
+# If you install the adapter globally instead of using `npx`, you can replace:
+#   command: npx
+#   args: ["-y", "@agentclientprotocol/claude-agent-acp"]
+# with:
+#   command: claude-agent-acp
+
+runtime:
+  kind: acp
+  compact_on_resume: true
+  acp:
+    command: npx
+    args:
+      - -y
+      - "@agentclientprotocol/claude-agent-acp"
+
+review:
+  request:
+    - mode: comment
+      comment: "/coder-agents-review"