diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c624351e..c99158d7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,17 @@ jobs:
     needs: ["build-ci-container"]
     container:
       image: ghcr.io/pluralkit/ci:${{ github.sha }}
+      volumes:
+        - /var/run/docker.sock:/var/run/docker.sock
     env:
+      DOCKER_HOST: unix:///var/run/docker.sock
+
+      COMMIT_STATUS_TOKEN: ${{ secrets.COMMIT_STATUS_TOKEN }}
+      DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
       DISPATCH_DATA: ${{ inputs.dispatchData }}
+
+      # these only work on the push/pull_request jobs
+      CUR_SHA: ${{ github.sha }}
+      OLD_SHA: ${{ github.event.before }}
     steps:
     - run: /run_ci.py
diff --git a/ci/Dockerfile b/ci/Dockerfile
index 5d9bb5e5..216781b0 100644
--- a/ci/Dockerfile
+++ b/ci/Dockerfile
@@ -1,3 +1,3 @@
 FROM alpine:latest
-RUN apk add python3
+RUN apk add python3 docker git
 COPY ci/run_ci.py /run_ci.py
diff --git a/ci/run.sh b/ci/run.sh
new file mode 100644
index 00000000..2da88f11
--- /dev/null
+++ b/ci/run.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+set -euo pipefail
+
+notify_discord() {
+  todo
+}
+
+# CI_PREV_COMMIT
+# GH_BRANCH
+
+files_changed=$(git diff --name-only $CI_PREV_COMMIT)
+
+if [ ! -z "$(echo $files_changed | grep -E '.cs$')" ]; then
+  dotnet_format
+fi
+
+if [ ! -z "$(echo $files_changed | grep -E '.rs$')" ]; then
+  rustfmt
+fi
+
+###
+
+if PluralKit.Bot changed build bot
+if PluralKit.Core changed build bot api
+idk this should just be python
diff --git a/ci/run_ci.py b/ci/run_ci.py
index 56acdbd1..2da5122b 100755
--- a/ci/run_ci.py
+++ b/ci/run_ci.py
@@ -1,6 +1,76 @@
 #!/usr/bin/env python3
 
-import os
 
-print("hello from python!")
-print(f"data: {os.environ.get("DISPATCH_DATA")}")
+import os, json, subprocess
+
+dispatch_data = os.environ.get("DISPATCH_DATA")
+
+def must_get_env(name):
+    val = os.environ.get(name)
+    if val == "":
+        raise "meow"
+    return val
+
+def docker_build(data):
+    # file="", tags=[], root="/"
+    pass
+
+def create_jobs():
+    modify_regexes = {
+        "^ci/": "all",
+
+        "^docs/": "bin_docs",
+        "^dashboard/": "bin_dashboard",
+
+        "\.rs$": "format_rs",
+        "\.cs$": "format_cs",
+
+        "^Cargo.lock": "all_rs",
+
+        "^services/api": "bin_api",
+        # dispatch doesn't use libpk
+        "^services/dispatch": "bin_dispatch",
+        "^services/scheduled_tasks": "bin_scheduled_tasks",
+
+        # one image for all dotnet
+        "^PluralKit\.": "bin_dotnet",
+        "^Myriad": "bin_dotnet",
+    }
+
+    aliases = {
+        "all": ["bin_dotnet", "bin_api", "bin_dispatch", "bin_scheduled_tasks", "bin_dashboard"],
+        "all_rs": ["bin_api", "bin_dispatch"],
+    }
+
+    now = must_get_env("CUR_SHA")
+    before = must_get_env("OLD_SHA")
+    changed_files = subprocess.check_output(["git", "diff", "--name-only", before, now])
+
+    jobs = set([])
+    for key in modify_regexes.keys():
+        if regex matches:
+            jobs = jobs | modify_regexes[key]
+
+    for key in changes:
+        if aliases.get(key) is not None:
+            jobs = jobs | aliases[key]
+            jobs = jobs - [key]
+
+    pass
+
+if __name__ == "__main__":
+    print("hello from python!")
+    subprocess.run(["docker", "run", "--rm", "-it", "hello-world"], check=True)
+
+    return
+    return create_jobs() if dispatch_data == ""
+
+    data = json.loads(dispatch_data)
+    match data.get("action"):
+        case "docker_build":
+            return docker_build(data.get("data"))
+        case "rustfmt":
+        case "dotnet_format":
+        case _:
+            print (f"data unknown: {dispatch_data}")
+            os.exit(1)