diff --git a/ofborg/src/bin/github-comment-poster.rs b/ofborg/src/bin/github-comment-poster.rs
new file mode 100644
index 0000000..1f41e5c
--- /dev/null
+++ b/ofborg/src/bin/github-comment-poster.rs
@@ -0,0 +1,89 @@
+extern crate ofborg;
+extern crate amqp;
+extern crate env_logger;
+
+extern crate hyper;
+extern crate hubcaps;
+extern crate hyper_native_tls;
+
+
+use std::env;
+
+use amqp::Basic;
+
+use ofborg::config;
+use ofborg::worker;
+use ofborg::tasks;
+use ofborg::easyamqp;
+use ofborg::easyamqp::TypedWrappers;
+
+
+fn main() {
+    let cfg = config::load(env::args().nth(1).unwrap().as_ref());
+    ofborg::setup_log();
+
+    let mut session = easyamqp::session_from_config(&cfg.rabbitmq).unwrap();
+    let mut channel = session.open_channel(1).unwrap();
+
+    channel
+        .declare_exchange(easyamqp::ExchangeConfig {
+            exchange: "build-results".to_owned(),
+            exchange_type: easyamqp::ExchangeType::Fanout,
+            passive: false,
+            durable: true,
+            auto_delete: false,
+            no_wait: false,
+            internal: false,
+            arguments: None,
+        })
+        .unwrap();
+
+    channel
+        .declare_queue(easyamqp::QueueConfig {
+            queue: "build-results".to_owned(),
+            passive: false,
+            durable: true,
+            exclusive: false,
+            auto_delete: false,
+            no_wait: false,
+            arguments: None,
+        })
+        .unwrap();
+
+    channel
+        .bind_queue(easyamqp::BindQueueConfig {
+            queue: "build-results".to_owned(),
+            exchange: "build-results".to_owned(),
+            routing_key: None,
+            no_wait: false,
+            arguments: None,
+        })
+        .unwrap();
+
+    channel.basic_prefetch(1).unwrap();
+    channel
+        .consume(
+            worker::new(tasks::githubcommentposter::GitHubCommentPoster::new(
+                cfg.github(),
+            )),
+            easyamqp::ConsumeConfig {
+                queue: "build-inputs".to_owned(),
+                consumer_tag: format!("{}-github-comment-poster", cfg.whoami()),
+                no_local: false,
+                no_ack: false,
+                no_wait: false,
+                exclusive: false,
+                arguments: None,
+            },
+        )
+        .unwrap();
+
+    channel.start_consuming();
+
+    println!("Finished consuming?");
+
+    channel.close(200, "Bye").unwrap();
+    println!("Closed the channel");
+    session.close(200, "Good Bye");
+    println!("Closed the session... EOF");
+}
diff --git a/ofborg/src/tasks/githubcommentposter.rs b/ofborg/src/tasks/githubcommentposter.rs
new file mode 100644
index 0000000..fddb275
--- /dev/null
+++ b/ofborg/src/tasks/githubcommentposter.rs
@@ -0,0 +1,276 @@
+extern crate amqp;
+extern crate env_logger;
+
+use serde_json;
+
+use hubcaps;
+use ofborg::message::buildresult::BuildResult;
+use ofborg::worker;
+use amqp::protocol::basic::{Deliver, BasicProperties};
+
+
+pub struct GitHubCommentPoster {
+    github: hubcaps::Github,
+}
+
+impl GitHubCommentPoster {
+    pub fn new(github: hubcaps::Github) -> GitHubCommentPoster {
+        return GitHubCommentPoster { github: github };
+    }
+}
+
+impl worker::SimpleWorker for GitHubCommentPoster {
+    type J = BuildResult;
+
+    fn msg_to_job(
+        &mut self,
+        _: &Deliver,
+        _: &BasicProperties,
+        body: &Vec<u8>,
+    ) -> Result<Self::J, String> {
+        return match serde_json::from_slice(body) {
+            Ok(e) => Ok(e),
+            Err(e) => {
+                println!(
+                    "Failed to deserialize BuildResult: {:?}",
+                    String::from_utf8(body.clone())
+                );
+                panic!("{:?}", e);
+            }
+        };
+    }
+
+    fn consumer(&mut self, job: &BuildResult) -> worker::Actions {
+        let comment = hubcaps::comments::CommentOptions { body: result_to_comment(&job) };
+
+        let comment_attempt = self.github
+            .repo(job.repo.owner.clone(), job.repo.name.clone())
+            .pulls()
+            .get(job.pr.number)
+            .comments()
+            .create(&comment);
+
+        match comment_attempt {
+            Ok(comment) => {
+                info!(
+                "Successfully sent {:?} to {}",
+                comment,
+                job.pr.number,
+            )
+            }
+            Err(err) => {
+                info!(
+                "Failed to send comment {:?} to {}",
+                err,
+                job.pr.number,
+            )
+            }
+        }
+
+        return vec![worker::Action::Ack];
+    }
+}
+
+fn result_to_comment(result: &BuildResult) -> String {
+    let mut reply: Vec<String> = vec![];
+
+    reply.push(format!(
+        "{} on {} [(full log)](https://logs.nix.gsc.io/?key={}/{}.{}&attempt_id={})",
+        (match result.success {
+             true => "Success",
+             false => "Failure",
+         }),
+        result.system,
+        &result.repo.owner.to_lowercase(),
+        &result.repo.name.to_lowercase(),
+        result.pr.number,
+        (match result.attempt_id {
+             Some(ref attempt_id) => &attempt_id,
+             None => "none",
+         })
+    ));
+    reply.push("".to_owned());
+    reply.push(
+        "<details><summary>Partial log (click to expand)</summary><p>".to_owned(),
+    );
+    reply.push("".to_owned());
+    reply.push("```".to_owned());
+    reply.extend(result.output.clone());
+    reply.push("```".to_owned());
+    reply.push("</p></details>".to_owned());
+    reply.push("".to_owned());
+    reply.push("".to_owned());
+
+    reply.join("\n")
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use message::{Pr, Repo};
+
+    #[test]
+    pub fn test_passing_build() {
+        let result = BuildResult {
+            repo: Repo {
+                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
+                full_name: "NixOS/nixpkgs".to_owned(),
+                owner: "NixOS".to_owned(),
+                name: "nixpkgs".to_owned(),
+            },
+            pr: Pr {
+                head_sha: "abc123".to_owned(),
+                number: 2345,
+                target_branch: Some("master".to_owned()),
+            },
+            output: vec![
+                "make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
+                "make[2]: Nothing to be done for 'install'.".to_owned(),
+                "make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
+                "make[1]: Nothing to be done for 'install-target'.".to_owned(),
+                "make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'".to_owned(),
+                "removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'".to_owned(),
+                "post-installation fixup".to_owned(),
+                "strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip".to_owned(),
+                "patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
+                "/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
+            ],
+            attempt_id: Some("neatattemptid".to_owned()),
+            system: "x86_64-linux".to_owned(),
+            success: true,
+        };
+
+        assert_eq!(
+            &result_to_comment(&result),
+            "Success on x86_64-linux [(full log)](https://logs.nix.gsc.io/?key=nixos/nixpkgs.2345&attempt_id=neatattemptid)
+
+<details><summary>Partial log (click to expand)</summary><p>
+
+```
+make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
+make[2]: Nothing to be done for 'install'.
+make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
+make[1]: Nothing to be done for 'install-target'.
+make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'
+removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'
+post-installation fixup
+strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip
+patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
+/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
+```
+</p></details>
+
+"
+        );
+    }
+
+    #[test]
+    pub fn test_failing_build() {
+        let result = BuildResult {
+            repo: Repo {
+                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
+                full_name: "NixOS/nixpkgs".to_owned(),
+                owner: "NixOS".to_owned(),
+                name: "nixpkgs".to_owned(),
+            },
+            pr: Pr {
+                head_sha: "abc123".to_owned(),
+                number: 2345,
+                target_branch: Some("master".to_owned()),
+            },
+            output: vec![
+                "make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
+                "make[2]: Nothing to be done for 'install'.".to_owned(),
+                "make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
+                "make[1]: Nothing to be done for 'install-target'.".to_owned(),
+                "make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'".to_owned(),
+                "removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'".to_owned(),
+                "post-installation fixup".to_owned(),
+                "strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip".to_owned(),
+                "patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
+                "/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
+            ],
+            attempt_id: Some("neatattemptid".to_owned()),
+            system: "x86_64-linux".to_owned(),
+            success: false,
+        };
+
+        assert_eq!(
+            &result_to_comment(&result),
+            "Failure on x86_64-linux [(full log)](https://logs.nix.gsc.io/?key=nixos/nixpkgs.2345&attempt_id=neatattemptid)
+
+<details><summary>Partial log (click to expand)</summary><p>
+
+```
+make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
+make[2]: Nothing to be done for 'install'.
+make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
+make[1]: Nothing to be done for 'install-target'.
+make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'
+removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'
+post-installation fixup
+strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip
+patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
+/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
+```
+</p></details>
+
+"
+        );
+    }
+
+    #[test]
+    pub fn test_failing_build_no_attempt_id() {
+        let result = BuildResult {
+            repo: Repo {
+                clone_url: "https://github.com/nixos/nixpkgs.git".to_owned(),
+                full_name: "NixOS/nixpkgs".to_owned(),
+                owner: "NixOS".to_owned(),
+                name: "nixpkgs".to_owned(),
+            },
+            pr: Pr {
+                head_sha: "abc123".to_owned(),
+                number: 2345,
+                target_branch: Some("master".to_owned()),
+            },
+            output: vec![
+                "make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
+                "make[2]: Nothing to be done for 'install'.".to_owned(),
+                "make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'".to_owned(),
+                "make[1]: Nothing to be done for 'install-target'.".to_owned(),
+                "make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'".to_owned(),
+                "removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'".to_owned(),
+                "post-installation fixup".to_owned(),
+                "strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip".to_owned(),
+                "patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
+                "/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1".to_owned(),
+            ],
+            attempt_id: None,
+            system: "x86_64-linux".to_owned(),
+            success: false,
+        };
+
+        assert_eq!(
+            &result_to_comment(&result),
+            "Failure on x86_64-linux [(full log)](https://logs.nix.gsc.io/?key=nixos/nixpkgs.2345&attempt_id=none)
+
+<details><summary>Partial log (click to expand)</summary><p>
+
+```
+make[2]: Entering directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
+make[2]: Nothing to be done for 'install'.
+make[2]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1/readline'
+make[1]: Nothing to be done for 'install-target'.
+make[1]: Leaving directory '/private/tmp/nix-build-gdb-8.1.drv-0/gdb-8.1'
+removed '/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1/share/info/bfd.info'
+post-installation fixup
+strip is /nix/store/5a88zk3jgimdmzg8rfhvm93kxib3njf9-cctools-binutils-darwin/bin/strip
+patching script interpreter paths in /nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
+/nix/store/pcja75y9isdvgz5i00pkrpif9rxzxc29-gdb-8.1
+```
+</p></details>
+
+"
+        );
+    }
+}
diff --git a/ofborg/src/tasks/mod.rs b/ofborg/src/tasks/mod.rs
index eb6ed18..d735e60 100644
--- a/ofborg/src/tasks/mod.rs
+++ b/ofborg/src/tasks/mod.rs
@@ -2,4 +2,5 @@
 pub mod build;
 pub mod massrebuilder;
 pub mod githubcommentfilter;
+pub mod githubcommentposter;
 pub mod log_message_collector;