diff --git a/.github/workflows/check-e2e.yml b/.github/workflows/check-e2e.yml
index 36072c27b..5a876c68b 100644
--- a/.github/workflows/check-e2e.yml
+++ b/.github/workflows/check-e2e.yml
@@ -12,7 +12,7 @@ jobs:
     continue-on-error: true
     strategy:
       matrix:
-        browser: [chromium, firefox, visual]
+        browser: [chromium, firefox, visual, heartwood]
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
@@ -59,12 +59,19 @@ jobs:
         run: npx playwright install-deps
 
       - name: Start http-api test server
-        run: ./scripts/run-http-api-with-fixtures --non-interactive --detach
+        run: |
+          if [ ${{ matrix.browser }} = "heartwood" ]; then
+            ./scripts/run-httpd-with-fixtures --non-interactive --detach
+          else
+            ./scripts/run-http-api-with-fixtures --non-interactive --detach
+          fi
 
       - name: Run Playwright tests
         run: |
           if [ ${{ matrix.browser }} = "visual" ] && [ ${{ github.ref }} = "refs/heads/master" ]; then
             npm run test:e2e -- --project ${{ matrix.browser }} --update-snapshots;
+          elif [ ${{ matrix.browser }} = "heartwood" ]; then
+            HEARTWOOD=true npm run test:e2e -- --project chromium;
           else
             npm run test:e2e -- --project ${{ matrix.browser }};
           fi
diff --git a/scripts/create-seed-fixture-heartwood b/scripts/create-seed-fixture-heartwood
new file mode 100755
index 000000000..894425184
--- /dev/null
+++ b/scripts/create-seed-fixture-heartwood
@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+PASSPHRASE=asdf
+SEED="0.0.0.0:8080"
+
+REPO_ROOT=$(git rev-parse --show-toplevel)
+ID=$(echo $RANDOM | md5sum | head -c 8)
+BASE_PATH=$REPO_ROOT/tests/tmp/create-seed-fixture-$ID
+
+TEST_REPO_ARCHIVE=$REPO_ROOT/tests/fixtures/repos/source-browsing.tar.bz2
+TEST_REPO_NAME=source-browsing
+TEST_REPO_PATH=$BASE_PATH/repos/$TEST_REPO_NAME
+
+PALM_RAD_HOME=$BASE_PATH/seeds/palm
+ALICE_RAD_HOME=$BASE_PATH/peers/alice
+ALICE_CHECKOUT=$BASE_PATH/checkout/alice
+BOB_RAD_HOME=$BASE_PATH/peers/bob
+BOB_CHECKOUT=$BASE_PATH/checkout/bob
+
+mkdir -p $PALM_RAD_HOME
+mkdir -p $ALICE_RAD_HOME
+mkdir -p $ALICE_CHECKOUT
+mkdir -p $BOB_RAD_HOME
+mkdir -p $BOB_CHECKOUT
+mkdir -p $TEST_REPO_PATH
+
+tar -xf $TEST_REPO_ARCHIVE -C $TEST_REPO_PATH
+
+RAD_HOME=$PALM_RAD_HOME RAD_PASSPHRASE=$PASSPHRASE rad auth
+
+GIT_AUTHOR_NAME="Alice Liddell"
+GIT_AUTHOR_EMAIL="alice@radicle.xyz"
+GIT_COMMITTER_NAME="Alice Liddell"
+GIT_COMMITTER_EMAIL="alice@radicle.xyz"
+
+RAD_DEBUG=1 RAD_HOME=$ALICE_RAD_HOME RAD_PASSPHRASE=$PASSPHRASE rad auth
+
+cd $ALICE_CHECKOUT
+
+git clone $TEST_REPO_PATH
+cd $TEST_REPO_NAME
+git checkout feature/branch
+git checkout orphaned-branch
+git checkout main
+
+RAD_HOME=$ALICE_RAD_HOME RAD_PASSPHRASE=$PASSPHRASE rad init --name "source-browsing" --description "Git repository for source browsing tests" --default-branch "main" --no-confirm
+PROJECT_ID=$(RAD_HOME=$ALICE_RAD_HOME RAD_PASSPHRASE=$PASSPHRASE rad .)
+
+cd $BASE_PATH
+tar -cjf palm.tar.bz2 --exclude "post-receive" --exclude "pre-receive" -C $ALICE_RAD_HOME .
diff --git a/scripts/run-http-api-with-fixtures b/scripts/run-http-api-with-fixtures
index d3947d4de..461d2fff1 100755
--- a/scripts/run-http-api-with-fixtures
+++ b/scripts/run-http-api-with-fixtures
@@ -10,8 +10,7 @@ PASSPHRASE=asdf
 CONTAINER_NAME=radicle-http-api-with-fixtures
 HTTP_API_BINARY=radicle-http-api
 
-show_usage()
-{
+show_usage() {
   echo
   echo "Starts a http-api backend with test fixtures."
   echo
@@ -26,8 +25,7 @@ show_usage()
   echo
 }
 
-prompt_workspace_removal()
-{
+prompt_workspace_removal() {
   echo "This will irrevocably destroy the following directories:"
   echo
   echo $WORKSPACE
@@ -35,19 +33,18 @@ prompt_workspace_removal()
 
   read -r -p "Are you sure you want to continue? [yes/no]: " confirm
   case "$confirm" in
-      [yY][eE][sS] )
-          rm -rf $WORKSPACE
-          echo "Done"
-          ;;
-      * )
-          echo "Ok, I won't touch your data."
-          exit
-          ;;
+    [yY][eE][sS])
+      rm -rf $WORKSPACE
+      echo "Done"
+      ;;
+    *)
+      echo "Ok, I won't touch your data."
+      exit
+      ;;
   esac
 }
 
-prepare_workspace()
-{
+prepare_workspace() {
   echo
   echo "Unpacking fixture $FIXTURE"
   mkdir -p $WORKSPACE
@@ -94,13 +91,13 @@ DETACH=false
 
 while [ $# -ne 0 ]; do
   case "$1" in
-    --binary|-b)
+    --binary | -b)
       BINARY=true
       ;;
-    --detach|-d)
+    --detach | -d)
       DETACH=true
       ;;
-    --non-interactive|-n)
+    --non-interactive | -n)
       NON_INTERACTIVE=true
       ;;
     *)
@@ -120,7 +117,6 @@ else
   prepare_workspace
 fi
 
-
 if [ "$BINARY" = true ]; then
   run_binary
 else
diff --git a/scripts/run-httpd-with-fixtures b/scripts/run-httpd-with-fixtures
new file mode 100755
index 000000000..78618c30d
--- /dev/null
+++ b/scripts/run-httpd-with-fixtures
@@ -0,0 +1,132 @@
+#!/bin/sh
+set -e
+
+REV=1f55d7a32750b3e63c56aad00370411b90420a29
+
+REPO_ROOT=$(git rev-parse --show-toplevel)
+FIXTURE=$REPO_ROOT/tests/fixtures/seeds/palm-heartwood.tar.bz2
+WORKSPACE=$REPO_ROOT/tests/tmp/palm
+PASSPHRASE=asdf
+CONTAINER_NAME=radicle-httpd-with-fixtures
+HTTP_API_BINARY=radicle-httpd
+
+show_usage() {
+  echo
+  echo "Starts a radicle-httpd backend with test fixtures."
+  echo
+  echo "USAGE:"
+  echo "  run-httpd-with-fixtures [-b|d|h|n]"
+  echo
+  echo "OPTIONS:"
+  echo "  -b --binary            Use a ${HTTP_API_BINARY} binary that is in PATH to avoid using Docker."
+  echo "  -d --detach            Daemonize the docker process."
+  echo "  -h --help              Print this Help."
+  echo "  -n --non-interactive   Run in non-interactive mode, no user prompts."
+  echo
+}
+
+prompt_workspace_removal() {
+  echo "This will irrevocably destroy the following directories:"
+  echo
+  echo $WORKSPACE
+  echo
+
+  read -r -p "Are you sure you want to continue? [yes/no]: " confirm
+  case "$confirm" in
+    [yY][eE][sS])
+      rm -rf $WORKSPACE
+      echo "Done"
+      ;;
+    *)
+      echo "Ok, I won't touch your data."
+      exit
+      ;;
+  esac
+}
+
+prepare_workspace() {
+  echo
+  echo "Unpacking fixture $FIXTURE"
+  mkdir -p $WORKSPACE
+  tar -xf $FIXTURE -C $WORKSPACE
+  if [ "$CI" = true ]; then
+    sudo chown -R 0:0 $WORKSPACE
+  fi
+}
+
+run_docker() {
+  echo "Starting docker at container $CONTAINER_NAME at $REV"
+  echo "  RAD_HOME=$WORKSPACE RAD_PASSPHRASE=$PASSPHRASE radicle-http"
+  echo
+
+  exec docker run \
+    --init \
+    --publish 8080:8080 \
+    --rm \
+    --name $CONTAINER_NAME \
+    --volume $WORKSPACE:/app/radicle \
+    "$@" \
+    --env "RAD_HOME=/app/radicle" \
+    --env "RAD_PASSPHRASE=$PASSPHRASE" \
+    "gcr.io/radicle-services/radicle-httpd:$REV"
+}
+
+run_binary() {
+  if ! [ -x "$(command -v $HTTP_API_BINARY)" ]; then
+    echo
+    echo "Couldn't find the $HTTP_API_BINARY binary in your PATH."
+    echo "You can compile it from source:"
+    echo "  👉 https://github.com/radicle-dev/heartwood"
+    echo
+    exit 1
+  fi
+
+  echo
+  echo "Starting $HTTP_API_BINARY"
+  echo "  RAD_HOME=$WORKSPACE $HTTP_API_BINARY"
+  echo
+
+  RAD_HOME=$WORKSPACE RAD_PASSPHRASE=$PASSPHRASE $HTTP_API_BINARY
+}
+
+BINARY=false
+NON_INTERACTIVE=false
+DETACH=false
+
+while [ $# -ne 0 ]; do
+  case "$1" in
+    --binary | -b)
+      BINARY=true
+      ;;
+    --detach | -d)
+      DETACH=true
+      ;;
+    --non-interactive | -n)
+      NON_INTERACTIVE=true
+      ;;
+    *)
+      show_usage
+      exit
+      ;;
+  esac
+
+  shift
+done
+
+if [ "$NON_INTERACTIVE" = true ]; then
+  rm -rf $WORKSPACE
+  prepare_workspace
+else
+  prompt_workspace_removal
+  prepare_workspace
+fi
+
+if [ "$BINARY" = true ]; then
+  run_binary
+else
+  if [ "$DETACH" = true ]; then
+    run_docker --detach
+  else
+    run_docker
+  fi
+fi
diff --git a/src/components/Authorship.svelte b/src/components/Authorship.svelte
index 70cf25360..a3d3af5d6 100644
--- a/src/components/Authorship.svelte
+++ b/src/components/Authorship.svelte
@@ -6,7 +6,11 @@
 
   import Address from "@app/components/Address.svelte";
   import { Profile, ProfileType } from "@app/lib/profile";
-  import { formatRadicleId, formatTimestamp } from "@app/lib/utils";
+  import {
+    formatRadicleId,
+    formatSeedId,
+    formatTimestamp,
+  } from "@app/lib/utils";
 
   export let noAvatar = false;
   export let author: Author;
@@ -67,7 +71,7 @@
     </span>
   {:else}
     <span class="highlight">
-      {formatRadicleId(author.id)}
+      {window.HEARTWOOD ? formatSeedId(author.id) : formatRadicleId(author.id)}
     </span>
   {/if}
   <span class="caption">&nbsp;{caption}&nbsp;</span>
diff --git a/src/components/Form.svelte b/src/components/Form.svelte
index 35188d436..c402c498c 100644
--- a/src/components/Form.svelte
+++ b/src/components/Form.svelte
@@ -20,17 +20,19 @@
 
   const validationExamples: Record<string, string> = {
     URL: "https://acme.xyz/",
-    URN: "eip155:1:0xd1bb21bd5a432d2919c82bcefe1bc7f8cc9207d9",
+    ID: "eip155:1:0xd1bb21bd5a432d2919c82bcefe1bc7f8cc9207d9",
     handle: "acme",
     id: "hydkkcf6k9be5fuszdhpqbctu3q3fuwagj874wx2puia8ti8coygh1",
-    identity: "rad:git:hnrkqdpm9ub19oc8dccx44echy75hzfsezyio",
+    identity: window.HEARTWOOD
+      ? "rad:zKtT7DmF9H34KkvcKj9PHW19WzjT"
+      : "rad:git:hnrkqdpm9ub19oc8dccx44echy75hzfsezyio",
     domain: "seed.acme.xyz",
     address: "0x17a8c096733BD5F87aD43D7A2A4d1C42ab8A2A70",
   };
 
   const validationTypes: { [index: string]: RegExp } = {
     URL: /^(https:\/\/|http:\/\/|ipfs:\/\/)\S+/,
-    URN: /^[a-z]+:[a-zA-Z0-9:-]{1,64}$/,
+    ID: /^z[a-z]+:[a-zA-Z0-9:-]{1,64}$/,
     // Github
     //   Username may only contain alphanumeric characters or hyphens.
     //   Username cannot have multiple consecutive hyphens.
@@ -43,7 +45,9 @@
     handle: /^[a-zA-Z0-9-_]{1,39}$/,
     address: /^0x[a-zA-Z0-9]{40}$/,
     id: /^[a-z0-9]+$/,
-    identity: /^rad:git:[a-z0-9]{37}$/,
+    identity: window.HEARTWOOD
+      ? /^rad:[a-z0-9]{28}$/
+      : /^rad:git:[a-z0-9]{37}$/,
     domain: /^[^/:$!_;,@#]+\.[a-z]{2,}$/,
   };
 </script>
diff --git a/src/global.d.ts b/src/global.d.ts
index 744f264ac..67d3d6d48 100644
--- a/src/global.d.ts
+++ b/src/global.d.ts
@@ -10,6 +10,8 @@ declare global {
     PLAYWRIGHT: boolean;
     HASH_ROUTING: boolean;
 
+    HEARTWOOD: boolean;
+
     // APP_CONFIG is set from within Playwright tests at runtime.
     // To better understand how it works together, have a look at:
     //   tests/support/fixtures.ts
diff --git a/src/lib/api.ts b/src/lib/api.ts
index 3092ebf09..8a9207be2 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -13,7 +13,11 @@ export class Request {
 
   constructor(path: string, api: Host) {
     this.port = api.port || defaultSeedPort;
-    this.base = api.host;
+    if (window.HEARTWOOD) {
+      this.base = api.host + "/api";
+    } else {
+      this.base = api.host;
+    }
     this.path = path.startsWith("/") ? path.slice(1) : path;
     this.protocol = api.host === "0.0.0.0" ? "http://" : "https://";
   }
diff --git a/src/lib/diff.ts b/src/lib/diff.ts
index 086bbddf6..a2321f2ba 100644
--- a/src/lib/diff.ts
+++ b/src/lib/diff.ts
@@ -89,6 +89,7 @@ export interface Diff {
   moved: string[];
   copied: string[];
   modified: FileDiff[];
+  stats: DiffStats;
 }
 
 export interface DiffStats {
diff --git a/src/lib/issue.ts b/src/lib/issue.ts
index 8e82765a6..25326afd1 100644
--- a/src/lib/issue.ts
+++ b/src/lib/issue.ts
@@ -12,7 +12,7 @@ export interface IIssue {
   author: Author;
   title: string;
   state: State;
-  comment: Comment;
+  comment: Comment; // TODO: Remove this after we have migrated to Heartwood.
   discussion: Thread[];
   tags: Tag[];
   timestamp: number;
@@ -32,7 +32,8 @@ export interface Comment<R = null> {
   body: string;
   reactions: Record<string, number>;
   timestamp: number;
-  replies: R;
+  replies: R; // TODO: Remove this after we have migrated to Heartwood.
+  replyTo: R;
 }
 
 export type Thread = Comment<Comment[]>;
@@ -57,7 +58,7 @@ export class Issue {
   author: Author;
   title: string;
   state: State;
-  comment: Comment;
+  comment: Comment; // TODO: Remove this after we have migrated to Heartwood.
   discussion: Thread[];
   tags: Tag[];
   timestamp: number;
@@ -67,18 +68,28 @@ export class Issue {
     this.author = issue.author;
     this.title = issue.title;
     this.state = issue.state;
-    this.comment = issue.comment;
+    this.comment = issue.comment; // TODO: Remove this after we have migrated to Heartwood.
     this.discussion = issue.discussion;
     this.tags = issue.tags;
-    this.timestamp = issue.timestamp;
+    if (window.HEARTWOOD) {
+      this.timestamp = issue.discussion[0].timestamp;
+    } else {
+      this.timestamp = issue.timestamp;
+    }
   }
 
   // Counts the amount of comments and replies in a discussion
   countComments(): number {
-    return this.discussion.reduce((acc, comment) => {
-      if (comment.replies) return acc + comment.replies.length + 1; // We add all replies and 1 forathe comment in this loop.
-      return acc + 1; // If there are no replies, we simply add 1 for the comment in this loop.
-    }, 0);
+    if (window.HEARTWOOD) {
+      return this.discussion.reduce(acc => {
+        return acc + 1; // If there are no replies, we simply add 1 for the comment in this loop.
+      }, 0);
+    } else {
+      return this.discussion.reduce((acc, comment) => {
+        if (comment.replies) return acc + comment.replies.length + 1; // We add all replies and 1 forathe comment in this loop.
+        return acc + 1; // If there are no replies, we simply add 1 for the comment in this loop.
+      }, 0);
+    }
   }
 
   static async getIssues(id: string, host: Host): Promise<Issue[]> {
diff --git a/src/lib/patch.ts b/src/lib/patch.ts
index e3bd5da9c..c6a8fedff 100644
--- a/src/lib/patch.ts
+++ b/src/lib/patch.ts
@@ -100,10 +100,16 @@ export class Patch implements IPatch {
 
   // Counts the amount of comments and replies in a discussion
   countComments(rev: number): number {
-    return this.revisions[rev].discussion.reduce((acc, comment) => {
-      if (comment.replies) return acc + comment.replies.length + 1; // We add all replies and 1 for each comment in this loop.
-      return acc + 1; // If there are no replies, we simply add 1 for the comment in this loop.
-    }, 0);
+    if (window.HEARTWOOD) {
+      return this.revisions[rev].discussion.reduce(acc => {
+        return acc + 1; // If there are no replies, we simply add 1 for the comment in this loop.
+      }, 0);
+    } else {
+      return this.revisions[rev].discussion.reduce((acc, comment) => {
+        if (comment.replies) return acc + comment.replies.length + 1; // We add all replies and 1 for each comment in this loop.
+        return acc + 1; // If there are no replies, we simply add 1 for the comment in this loop.
+      }, 0);
+    }
   }
 
   createTimeline(rev: number) {
diff --git a/src/lib/project.ts b/src/lib/project.ts
index a52b4f906..19914a2a4 100644
--- a/src/lib/project.ts
+++ b/src/lib/project.ts
@@ -12,6 +12,7 @@ export type Branches = { [key: string]: string };
 export type MaybeBlob = Blob | undefined;
 export type MaybeTree = Tree | undefined;
 
+// TODO: Remove this after we have migrated to Heartwood.
 export type Delegate =
   | {
       type: "indirect";
@@ -40,38 +41,43 @@ export interface ProjectInfo {
   name: string;
   description: string;
   defaultBranch: string;
-  delegates: Delegate[];
-  remotes: PeerId[];
+  delegates: Delegate[]; // TODO: Remove this after we have migrated to Heartwood.
+  remotes: PeerId[]; // TODO: Remove this after we have migrated to Heartwood.
   patches?: number;
   issues?: number;
 }
 
 export interface Tree {
   path: string;
-  info: EntryInfo;
+  info: EntryInfo; // TODO: Remove this after we have migrated to Heartwood.
   entries: Array<Entry>;
   stats: Stats;
+  name: string;
+  kind: Kind;
+  lastCommit: CommitHeader;
 }
 
+// TODO: Remove "TREE" and "BLOB" after we have migrated to Heartwood.
+type Kind = "tree" | "blob" | "TREE" | "BLOB";
+
 export interface Stats {
   commits: number;
   contributors: number;
 }
 
-export enum ObjectType {
-  Blob = "BLOB",
-  Tree = "TREE",
-}
-
+// TODO: Remove this after we have migrated to Heartwood.
 export interface EntryInfo {
   name: string;
-  objectType: ObjectType;
+  objectType: Kind;
   lastCommit: CommitHeader;
 }
 
 export interface Entry {
   path: string;
-  info: EntryInfo;
+  info: EntryInfo; // TODO: Remove this after we have migrated to Heartwood.
+  name: string;
+  kind: Kind;
+  lastCommit: CommitHeader;
 }
 
 export interface Blob {
@@ -79,7 +85,10 @@ export interface Blob {
   html?: boolean;
   content: string;
   path: string;
-  info: EntryInfo;
+  info: EntryInfo; // TODO: Remove this after we have migrated to Heartwood.
+  name: string;
+  kind: Kind;
+  lastCommit: CommitHeader;
 }
 
 export interface Remote {
@@ -144,8 +153,8 @@ export class Project implements ProjectInfo {
   name: string;
   description: string;
   defaultBranch: string;
-  delegates: Delegate[];
-  remotes: PeerId[];
+  delegates: Delegate[]; // TODO: Remove this after we have migrated to Heartwood.
+  remotes: PeerId[]; // TODO: Remove this after we have migrated to Heartwood.
   seed: Seed;
   peers: Peer[];
   branches: Branches;
@@ -167,8 +176,8 @@ export class Project implements ProjectInfo {
     this.name = info.name;
     this.description = info.description;
     this.defaultBranch = info.defaultBranch;
-    this.delegates = info.delegates;
-    this.remotes = info.remotes;
+    this.delegates = info.delegates; // TODO: Remove this after we have migrated to Heartwood.
+    this.remotes = info.remotes; // TODO: Remove this after we have migrated to Heartwood.
     this.seed = seed;
     this.peers = peers;
     this.branches = branches;
@@ -192,10 +201,14 @@ export class Project implements ProjectInfo {
   }
 
   static async getInfo(nameOrId: string, host: Host): Promise<ProjectInfo> {
-    const result = await new Request(`projects/${nameOrId}`, host).get();
-    result["id"] = result["urn"];
-    delete result["urn"];
-    return result;
+    if (window.HEARTWOOD) {
+      return await new Request(`projects/${nameOrId}`, host).get();
+    } else {
+      const result = await new Request(`projects/${nameOrId}`, host).get();
+      result["id"] = result["urn"];
+      delete result["urn"];
+      return result;
+    }
   }
 
   static async getProjects(
@@ -209,13 +222,17 @@ export class Project implements ProjectInfo {
       "per-page": opts?.perPage,
       page: opts?.page,
     };
-    const results = await new Request("projects", host).get(params);
-    results.forEach((result: { [x: string]: any }) => {
-      result["id"] = result["urn"];
-      delete result["urn"];
-    });
+    if (window.HEARTWOOD) {
+      return await new Request("projects", host).get(params);
+    } else {
+      const results = await new Request("projects", host).get(params);
+      results.forEach((result: { [x: string]: any }) => {
+        result["id"] = result["urn"];
+        delete result["urn"];
+      });
 
-    return results;
+      return results;
+    }
   }
 
   static async getDelegateProjects(
@@ -280,28 +297,31 @@ export class Project implements ProjectInfo {
       `projects/${this.id}/commits/${commit}`,
       this.seed.addr,
     ).get();
-    result.stats["insertions"] = result.stats["additions"];
-    delete result.stats["additions"];
-    result.diff["added"] = result.diff["created"];
-    delete result.diff["created"];
 
-    for (const kind of ["added", "deleted", "modified"]) {
-      for (const file of result.diff[kind]) {
-        for (const hunk of file.diff.hunks) {
-          for (const line of hunk.lines) {
-            if (line["lineNumOld"]) {
-              line["lineNoOld"] = line["lineNumOld"];
-              delete line["lineNumOld"];
-            }
+    if (!window.HEARTWOOD) {
+      result.stats["insertions"] = result.stats["additions"];
+      delete result.stats["additions"];
+      result.diff["added"] = result.diff["created"];
+      delete result.diff["created"];
 
-            if (line["lineNumNew"]) {
-              line["lineNoNew"] = line["lineNumNew"];
-              delete line["lineNumNew"];
-            }
+      for (const kind of ["added", "deleted", "modified"]) {
+        for (const file of result.diff[kind]) {
+          for (const hunk of file.diff.hunks) {
+            for (const line of hunk.lines) {
+              if (line["lineNumOld"]) {
+                line["lineNoOld"] = line["lineNumOld"];
+                delete line["lineNumOld"];
+              }
 
-            if (line["lineNum"]) {
-              line["lineNo"] = line["lineNum"];
-              delete line["lineNum"];
+              if (line["lineNumNew"]) {
+                line["lineNoNew"] = line["lineNumNew"];
+                delete line["lineNumNew"];
+              }
+
+              if (line["lineNum"]) {
+                line["lineNo"] = line["lineNum"];
+                delete line["lineNum"];
+              }
             }
           }
         }
@@ -364,12 +384,16 @@ export class Project implements ProjectInfo {
     const info = await Project.getInfo(id, seed.addr);
     id = isRadicleId(id) ? id : info.id;
 
-    // Older versions of http-api don't include the ID.
-    if (!info.id) info.id = id;
+    let peers: Peer[] = [];
 
-    const peers: Peer[] = info.delegates
-      ? await Project.getRemotes(id, seed.addr)
-      : [];
+    if (window.HEARTWOOD) {
+      peers = await Project.getRemotes(id, seed.addr);
+    } else {
+      // Older versions of http-api don't include the ID.
+      if (!info.id) info.id = id;
+
+      peers = info.delegates ? await Project.getRemotes(id, seed.addr) : [];
+    }
 
     let remote: Remote = {
       heads: info.head ? { [info.defaultBranch]: info.head } : {},
diff --git a/src/lib/registrar.ts b/src/lib/registrar.ts
index bec7264de..430478eea 100644
--- a/src/lib/registrar.ts
+++ b/src/lib/registrar.ts
@@ -90,18 +90,8 @@ export async function getRegistration(
     getText(resolver, "com.github"),
   ]);
 
-  const [
-    address,
-    avatar,
-    url,
-    id,
-    seedId,
-    seedHost,
-    seedGit,
-    seedApi,
-    twitter,
-    github,
-  ] = meta.filter(isFulfilled).map(r => (r.value ? r.value : undefined));
+  const [address, avatar, url, id, seedId, seedHost, seedApi, twitter, github] =
+    meta.filter(isFulfilled).map(r => (r.value ? r.value : undefined));
 
   const profile: EnsProfile = {
     name,
@@ -119,7 +109,6 @@ export async function getRegistration(
       profile.seed = new Seed({
         host: seedHost,
         id: seedId,
-        git: seedGit,
         addr: seedApi,
       });
     } catch (e: any) {
@@ -157,10 +146,9 @@ export async function getSeed(
     return null;
   }
 
-  const [id, host, git, api] = await Promise.all([
+  const [id, host, api] = await Promise.all([
     getText(resolver, "eth.radicle.seed.id"),
     getText(resolver, "eth.radicle.seed.host"),
-    getText(resolver, "eth.radicle.seed.git"),
     getText(resolver, "eth.radicle.seed.api"),
   ]);
 
@@ -170,7 +158,7 @@ export async function getSeed(
   }
 
   try {
-    return new Seed({ host, id, git, addr: api });
+    return new Seed({ host, id, addr: api });
   } catch (e: any) {
     console.debug(e, host, id);
     return new InvalidSeed(id, host);
diff --git a/src/lib/seed.ts b/src/lib/seed.ts
index 723e55ee5..306877ab8 100644
--- a/src/lib/seed.ts
+++ b/src/lib/seed.ts
@@ -23,15 +23,16 @@ export class InvalidSeed {
   }
 }
 
-export const defaultSeedPort = 8777;
+export const defaultSeedPort = window.HEARTWOOD ? 8080 : 8777;
 export const defaultNodePort = 8776;
+// TODO: Remove this after we have migrated to Heartwood.
 export const defaultGitPort = 443;
 
 export class Seed {
   valid = true as const;
 
   addr: { host: string; port: number | null };
-  git: { host: string; port: number | null };
+  git: { host: string; port: number | null }; // TODO: Remove this after we have migrated to Heartwood.
   node: { host: string; id: string; port: number };
 
   version?: string;
@@ -40,17 +41,21 @@ export class Seed {
   constructor(seed: {
     host: string;
     id: string;
-    git?: string | null;
+    git?: string | null; // TODO: Remove this after we have migrated to Heartwood.
     addr?: string | null;
     version?: string | null;
   }) {
     assert(isDomain(seed.host), `invalid seed host: ${seed.host}`);
-    assert(/^[a-z0-9]+$/.test(seed.id), `invalid seed id ${seed.id}`);
+    if (window.HEARTWOOD) {
+      assert(/^[a-zA-Z0-9]+$/.test(seed.id), `invalid seed id ${seed.id}`);
+    } else {
+      assert(/^[a-z0-9]+$/.test(seed.id), `invalid seed id ${seed.id}`);
+    }
 
     let _seed = null;
-    let _git = null;
+    let _git = null; // TODO: Remove this after we have migrated to Heartwood.
     let _seedPort: number | null = defaultSeedPort;
-    let _gitPort: number | null = defaultGitPort;
+    let _gitPort: number | null = defaultGitPort; // TODO: Remove this after we have migrated to Heartwood.
 
     if (seed.addr) {
       try {
@@ -73,15 +78,17 @@ export class Seed {
       assert(isDomain(_seed), `invalid seed host ${_seed}`);
     }
 
-    if (seed.git) {
-      try {
-        const url = new URL(seed.git);
-        _git = url.hostname;
-        _gitPort = url.port ? Number(url.port) : null;
-      } catch {
-        _git = seed.git;
+    if (window.HEARTWOOD) {
+      if (seed.git) {
+        try {
+          const url = new URL(seed.git);
+          _git = url.hostname;
+          _gitPort = url.port ? Number(url.port) : null;
+        } catch {
+          _git = seed.git;
+        }
+        assert(isDomain(_git), `invalid seed git host ${_git}`);
       }
-      assert(isDomain(_git), `invalid seed git host ${_git}`);
     }
 
     this.emoji = getSeedEmoji(seed.host);
@@ -89,10 +96,10 @@ export class Seed {
     // The `_seed` being more specific takes
     // precedence over the `host`, if available.
     _seed = _seed ?? seed.host;
-    _git = _git ?? seed.host;
+    _git = _git ?? seed.host; // TODO: Remove this after we have migrated to Heartwood.
 
     this.addr = { host: _seed, port: _seedPort };
-    this.git = { host: _git, port: _gitPort };
+    this.git = { host: _git, port: _gitPort }; // TODO: Remove this after we have migrated to Heartwood.
     this.node = { host: seed.host, id: seed.id, port: defaultNodePort };
 
     if (seed.version) {
@@ -121,10 +128,14 @@ export class Seed {
       ? await proj.Project.getDelegateProjects(id, this.addr, { perPage })
       : await proj.Project.getProjects(this.addr, { perPage });
 
-    return result.map((project: proj.ProjectInfo) => ({
-      ...project,
-      id: project.id,
-    }));
+    if (window.HEARTWOOD) {
+      return result;
+    } else {
+      return result.map((project: proj.ProjectInfo) => ({
+        ...project,
+        id: project.id,
+      }));
+    }
   }
 
   async getStats(): Promise<{
@@ -135,7 +146,11 @@ export class Seed {
   }
 
   static async getNode(host: Host): Promise<{ id: string }> {
-    return new Request("/peer", host).get();
+    if (window.HEARTWOOD) {
+      return new Request("/node", host).get();
+    } else {
+      return new Request("/peer", host).get();
+    }
   }
 
   static async getInfo(host: Host): Promise<{ version: string }> {
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index fbdf2f09c..ffc9d62c7 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -105,7 +105,11 @@ export function formatSeedId(id: string): string {
 export function formatRadicleId(id: string): string {
   assert(isRadicleId(id));
 
-  return id.substring(0, 14) + "…" + id.substring(id.length - 6, id.length);
+  if (window.HEARTWOOD) {
+    return id.substring(0, 10) + "…" + id.substring(id.length - 6, id.length);
+  } else {
+    return id.substring(0, 14) + "…" + id.substring(id.length - 6, id.length);
+  }
 }
 
 export function formatBalance(n: BigNumber, decimals?: number): string {
@@ -245,7 +249,11 @@ export const formatTimestamp = (
 
 // Check whether the input is a Radicle ID.
 export function isRadicleId(input: string): boolean {
-  return /^rad:[a-z]+:[a-zA-Z0-9]+$/.test(input);
+  if (window.HEARTWOOD) {
+    return /^rad:[a-zA-Z0-9]+$/.test(input);
+  } else {
+    return /^rad:[a-z]+:[a-zA-Z0-9]+$/.test(input);
+  }
 }
 
 // Check whether the input is a Radicle Peer ID.
@@ -295,7 +303,11 @@ export function formatName(input: string, wallet: Wallet): string {
 
 // Parse a Radicle Id.
 export function parseRadicleId(id: string): string {
-  return id.replace(/^rad:[a-z]+:/, "");
+  if (window.HEARTWOOD) {
+    return id.replace(/^rad:/, "");
+  } else {
+    return id.replace(/^rad:[a-z]+:/, "");
+  }
 }
 
 // Get amount of days passed between two dates without including the end date
diff --git a/src/views/projects/Blob.svelte b/src/views/projects/Blob.svelte
index f460afab0..79a559024 100644
--- a/src/views/projects/Blob.svelte
+++ b/src/views/projects/Blob.svelte
@@ -18,7 +18,7 @@
   export let line: string | undefined = undefined;
 
   const fileExtension = blob.path.split(".").pop() ?? "";
-  const lastCommit = blob.info.lastCommit;
+  const lastCommit = window.HEARTWOOD ? blob.lastCommit : blob.info.lastCommit;
   const parentDir = blob.path
     .match(/^.*\/|/)
     ?.values()
@@ -213,7 +213,7 @@
       <span class="file-name">
         <span class="txt-faded">{parentDir}</span>
         &#8203;
-        <span>{blob.info.name}</span>
+        <span>{window.HEARTWOOD ? blob.name : blob.info.name}</span>
       </span>
       <div class="right">
         {#if isMarkdown}
diff --git a/src/views/projects/Commit.svelte b/src/views/projects/Commit.svelte
index 870b04802..21bfb4d31 100644
--- a/src/views/projects/Commit.svelte
+++ b/src/views/projects/Commit.svelte
@@ -73,5 +73,8 @@
       {/if}
     </div>
   </header>
-  <Changeset stats={commit.stats} diff={commit.diff} on:browse={onBrowse} />
+  <Changeset
+    stats={window.HEARTWOOD ? commit.diff.stats : commit.stats}
+    diff={commit.diff}
+    on:browse={onBrowse} />
 </div>
diff --git a/src/views/projects/Commit/CommitTeaser.svelte b/src/views/projects/Commit/CommitTeaser.svelte
index 6ef01ae51..47be7cd24 100644
--- a/src/views/projects/Commit/CommitTeaser.svelte
+++ b/src/views/projects/Commit/CommitTeaser.svelte
@@ -94,7 +94,7 @@
     <CommitAuthorship {commit} noDelegate />
   </div>
   <div class="column-right">
-    {#if commit.context.committer}
+    {#if !window.HEARTWOOD && commit.context.committer}
       <div class="layout-desktop">
         <CommitVerifiedBadge {commit} />
       </div>
diff --git a/src/views/projects/Header.svelte b/src/views/projects/Header.svelte
index 3660ad348..4888e5034 100644
--- a/src/views/projects/Header.svelte
+++ b/src/views/projects/Header.svelte
@@ -98,9 +98,12 @@
     {revision}
     on:branchChanged={event => updateRevision(event.detail)} />
 
-  {#if seed.git.host}
+  {#if window.HEARTWOOD && seed.addr.host}
+    <CloneButton seedHost={seed.addr.host} {id} />
+  {:else if seed.git.host}
     <CloneButton seedHost={seed.git.host} {id} />
   {/if}
+
   <span>
     {#if seed.addr.host}
       <HeaderToggleLabel
diff --git a/src/views/projects/Issue.svelte b/src/views/projects/Issue.svelte
index a72ff2b91..0d88af754 100644
--- a/src/views/projects/Issue.svelte
+++ b/src/views/projects/Issue.svelte
@@ -136,15 +136,20 @@
   </header>
   <main>
     <div class="comments">
-      <Comment comment={issue.comment} {getImage} {wallet} />
+      {#if !window.HEARTWOOD}
+        <Comment comment={issue.comment} {getImage} {wallet} />
+      {/if}
+
       {#each issue.discussion as comment}
         <Comment {comment} {getImage} {wallet} />
-        {#if comment.replies}
-          <div class="replies">
-            {#each comment.replies as reply}
-              <Comment comment={reply} {getImage} {wallet} />
-            {/each}
-          </div>
+        {#if !window.HEARTWOOD}
+          {#if comment.replies}
+            <div class="replies">
+              {#each comment.replies as reply}
+                <Comment comment={reply} {getImage} {wallet} />
+              {/each}
+            </div>
+          {/if}
         {/if}
       {/each}
     </div>
diff --git a/src/views/projects/Patch.svelte b/src/views/projects/Patch.svelte
index 7b960916d..86c434a6a 100644
--- a/src/views/projects/Patch.svelte
+++ b/src/views/projects/Patch.svelte
@@ -138,8 +138,10 @@
       </div>
     {:else if activeTab === PatchTab.Diff && revision.changeset}
       <Changeset
+        stats={window.HEARTWOOD
+          ? revision.changeset.diff.stats
+          : revision.changeset.stats}
         diff={revision.changeset.diff}
-        stats={revision.changeset.stats}
         on:browse={e => onBrowse(e, revision.oid)} />
     {:else if activeTab === PatchTab.Diff}
       <Placeholder emoji="🍳">
diff --git a/src/views/projects/Patch/PatchTimeline.svelte b/src/views/projects/Patch/PatchTimeline.svelte
index eaca11ec1..04dd8aa0e 100644
--- a/src/views/projects/Patch/PatchTimeline.svelte
+++ b/src/views/projects/Patch/PatchTimeline.svelte
@@ -66,11 +66,13 @@
     {:else if element.type === TimelineType.Thread}
       <div class="margin-left">
         <Comment comment={element.inner} {wallet} {getImage} />
-        <div class="replies">
-          {#each element.inner.replies as comment}
-            <Comment caption="replied" {comment} {wallet} {getImage} />
-          {/each}
-        </div>
+        {#if !window.HEARTWOOD}
+          <div class="replies">
+            {#each element.inner.replies as comment}
+              <Comment caption="replied" {comment} {wallet} {getImage} />
+            {/each}
+          </div>
+        {/if}
       </div>
     {/if}
   {/each}
diff --git a/src/views/projects/Tree.svelte b/src/views/projects/Tree.svelte
index 1f86d6c42..eb30a07ce 100644
--- a/src/views/projects/Tree.svelte
+++ b/src/views/projects/Tree.svelte
@@ -3,8 +3,6 @@
 
   import { createEventDispatcher } from "svelte";
 
-  import { ObjectType } from "@app/lib/project";
-
   import File from "./Tree/File.svelte";
   import Folder from "./Tree/Folder.svelte";
 
@@ -20,11 +18,11 @@
 </script>
 
 {#each tree.entries as entry (entry.path)}
-  {#if entry.info.objectType === ObjectType.Tree}
+  {#if window.HEARTWOOD ? entry.kind === "tree" : entry.info.objectType === "TREE"}
     <Folder
       {fetchTree}
       {loadingPath}
-      name={entry.info.name}
+      name={window.HEARTWOOD ? entry.name : entry.info.name}
       prefix={`${entry.path}/`}
       currentPath={path}
       on:select={onSelect} />
@@ -32,7 +30,7 @@
     <File
       active={entry.path === path}
       loading={entry.path === loadingPath}
-      name={entry.info.name}
+      name={window.HEARTWOOD ? entry.name : entry.info.name}
       on:click={() => onSelect({ detail: entry.path })} />
   {/if}
 {/each}
diff --git a/src/views/projects/Tree/Folder.svelte b/src/views/projects/Tree/Folder.svelte
index e13889437..ca5aa72ef 100644
--- a/src/views/projects/Tree/Folder.svelte
+++ b/src/views/projects/Tree/Folder.svelte
@@ -2,7 +2,6 @@
   import type { MaybeTree } from "@app/lib/project";
 
   import Loading from "@app/components/Loading.svelte";
-  import { ObjectType } from "@app/lib/project";
   import { createEventDispatcher } from "svelte";
 
   import File from "./File.svelte";
@@ -75,10 +74,10 @@
     {:then tree}
       {#if tree}
         {#each tree.entries as entry (entry.path)}
-          {#if entry.info.objectType === ObjectType.Tree}
+          {#if window.HEARTWOOD ? entry.kind === "tree" : entry.info.objectType === "TREE"}
             <svelte:self
               {fetchTree}
-              name={entry.info.name}
+              name={window.HEARTWOOD ? entry.name : entry.info.name}
               on:select={onSelectFile}
               prefix={`${entry.path}/`}
               {loadingPath}
@@ -87,7 +86,7 @@
             <File
               active={entry.path === currentPath}
               loading={entry.path === loadingPath}
-              name={entry.info.name}
+              name={window.HEARTWOOD ? entry.name : entry.info.name}
               on:click={() => {
                 onSelectFile({ detail: entry.path });
               }} />
diff --git a/src/views/registrations/View.svelte b/src/views/registrations/View.svelte
index a8ab70635..3134fe663 100644
--- a/src/views/registrations/View.svelte
+++ b/src/views/registrations/View.svelte
@@ -124,7 +124,9 @@
           name: "id",
           label: "Radicle",
           validate: "identity",
-          placeholder: "Radicle ID, eg. rad:git:hnrkqdpm9ub19oc8d…",
+          placeholder: window.HEARTWOOD
+            ? "Radicle ID, eg. rad:zKtT7DmF9H34KkvcKj…"
+            : "Radicle ID, eg. rad:git:hnrkqdpm9ub19oc8d…",
           description: "The local radicle identity associated with this name.",
           value: r.profile.id ?? "",
           editable: true,
diff --git a/tests/e2e/project.spec.ts b/tests/e2e/project.spec.ts
index 99b79606e..43c5acc9b 100644
--- a/tests/e2e/project.spec.ts
+++ b/tests/e2e/project.spec.ts
@@ -251,6 +251,10 @@ test("clone modal", async ({ page }) => {
 });
 
 test("peer and branch switching", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.goto(projectFixtureUrl);
 
   // Alice's peer.
@@ -335,6 +339,10 @@ test("peer and branch switching", async ({ page }) => {
 });
 
 test("only one modal can be open at a time", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.goto(projectFixtureUrl);
 
   await page.getByTitle("Change peer").click();
@@ -366,6 +374,10 @@ test("only one modal can be open at a time", async ({ page }) => {
 });
 
 test.describe("browser error handling", () => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   test("error appears when folder can't be loaded", async ({ page }) => {
     await page.route(
       `**/v1/projects/${ridPrefix}${rid}/tree/${aliceMainHead}/markdown/`,
diff --git a/tests/e2e/project/commit.spec.ts b/tests/e2e/project/commit.spec.ts
index aa36f06c7..07c571310 100644
--- a/tests/e2e/project/commit.spec.ts
+++ b/tests/e2e/project/commit.spec.ts
@@ -8,6 +8,10 @@ import {
 const modifiedFileFixture = `${projectFixtureUrl}/remotes/${bobRemote}/commits/2b32f6fe50090ebdb4cd7441e943330da3e6ff04`;
 
 test("navigation from commit list", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.goto(projectFixtureUrl);
   await page.getByTitle("Change peer").click();
   await page.locator("text=bob hyyzz9").click();
@@ -18,6 +22,10 @@ test("navigation from commit list", async ({ page }) => {
 });
 
 test("relative timestamps", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.addInitScript(() => {
     window.initializeTestStubs = () => {
       window.e2eTestStubs.FakeTimers.install({
@@ -34,6 +42,10 @@ test("relative timestamps", async ({ page }) => {
 });
 
 test("modified file", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.goto(modifiedFileFixture);
 
   // Commit header.
@@ -59,6 +71,10 @@ test("modified file", async ({ page }) => {
 });
 
 test("created file", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.goto(
     `${projectFixtureUrl}/remotes/${bobRemote}/commits/d6318f7f3d9c15b8ac6dd52267c53220d00f0982`,
   );
@@ -69,6 +85,10 @@ test("created file", async ({ page }) => {
 });
 
 test("deleted file", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.goto(
     `${projectFixtureUrl}/remotes/${bobRemote}/commits/cd13c2d9a8a930d64a82b6134b44d1b872e33662`,
   );
diff --git a/tests/e2e/project/commits.spec.ts b/tests/e2e/project/commits.spec.ts
index 18956b343..74e45818a 100644
--- a/tests/e2e/project/commits.spec.ts
+++ b/tests/e2e/project/commits.spec.ts
@@ -6,6 +6,10 @@ import {
 } from "@tests/support/fixtures.js";
 
 test("peer and branch switching", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.goto(projectFixtureUrl);
   await page.locator('role=button[name="Commit count"]').click();
 
@@ -83,6 +87,10 @@ test("peer and branch switching", async ({ page }) => {
 });
 
 test("verified badge", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.goto(projectFixtureUrl);
   await page.locator('role=button[name="Commit count"]').click();
 
@@ -101,6 +109,10 @@ test("verified badge", async ({ page }) => {
 });
 
 test("relative timestamps", async ({ page }) => {
+  if (process.env.HEARTWOOD) {
+    test.skip();
+  }
+
   await page.addInitScript(() => {
     window.initializeTestStubs = () => {
       window.e2eTestStubs.FakeTimers.install({
diff --git a/tests/fixtures/seeds/palm-heartwood.tar.bz2 b/tests/fixtures/seeds/palm-heartwood.tar.bz2
new file mode 100644
index 000000000..cb2ccada6
Binary files /dev/null and b/tests/fixtures/seeds/palm-heartwood.tar.bz2 differ
diff --git a/tests/support/fixtures.ts b/tests/support/fixtures.ts
index addf60083..ffc6453a5 100644
--- a/tests/support/fixtures.ts
+++ b/tests/support/fixtures.ts
@@ -160,7 +160,11 @@ function log(text: string, label: string, outputLog: Stream.Writable) {
   }
 }
 
-export function appConfigWithFixture() {
+export const appConfigWithFixture = process.env.HEARTWOOD
+  ? configFixtureHeartwood
+  : configFixture;
+
+export function configFixture() {
   window.APP_CONFIG = {
     walletConnect: {
       bridge: "https://radicle.bridge.walletconnect.org",
@@ -181,15 +185,41 @@ export function appConfigWithFixture() {
   };
 }
 
+export function configFixtureHeartwood() {
+  window.APP_CONFIG = {
+    walletConnect: {
+      bridge: "https://radicle.bridge.walletconnect.org",
+    },
+    reactions: [],
+    seeds: {
+      pinned: [{ host: "0.0.0.0", emoji: "🚀" }],
+    },
+    projects: {
+      pinned: [
+        {
+          name: "source-browsing",
+          id: "rad:zKtT7DmF9H34KkvcKj9PHW19WzjT",
+          seed: "0.0.0.0",
+        },
+      ],
+    },
+  };
+}
+
 export const aliceMainHead = "fcc929424b82984b7cbff9c01d2e20d9b1249842";
-export const aliceRemote =
-  "hybg18bc4cu8z9xtj44skxperfdpxpp1wp8zygyzti5kfiggdizfxy";
+export const aliceRemote = process.env.HEARTWOOD
+  ? "z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi"
+  : "hybg18bc4cu8z9xtj44skxperfdpxpp1wp8zygyzti5kfiggdizfxy";
+
 export const bobRemote =
   "hyyzz9w4ffg16zftjki3enajm4mkqkayb5ch1p6ns3f83np1hqkrp6";
-export const rid = "hnrkdi8be7n4hhqoz9rpzrgd68u9dr3zsxgmy";
-export const ridPrefix = "rad:git:";
+export const rid = process.env.HEARTWOOD
+  ? "zKtT7DmF9H34KkvcKj9PHW19WzjT"
+  : "hnrkdi8be7n4hhqoz9rpzrgd68u9dr3zsxgmy";
+export const ridPrefix = process.env.HEARTWOOD ? "rad:" : "rad:git:";
 export const projectFixtureUrl = `/seeds/0.0.0.0/${ridPrefix}${rid}`;
-export const seedPort = 8777;
-export const seedVersion = "0.2.0";
-export const seedRemote =
-  "hybuytx44z9cfsm5739wecia9j4b7expgc15qkazph59szp57m4d3o";
+export const seedPort = process.env.HEARTWOOD ? 8080 : "8777";
+export const seedVersion = process.env.HEARTWOOD ? "0.1.0" : "0.2.0";
+export const seedRemote = process.env.HEARTWOOD
+  ? "z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi"
+  : "hybuytx44z9cfsm5739wecia9j4b7expgc15qkazph59szp57m4d3o";
diff --git a/tests/support/globalSetup.ts b/tests/support/globalSetup.ts
index 617dff674..60cca10ee 100644
--- a/tests/support/globalSetup.ts
+++ b/tests/support/globalSetup.ts
@@ -9,24 +9,30 @@ export default async function globalSetup(_config: FullConfig): Promise<void> {
 // Assert that the test http-api is running. If it is not running, throw an
 // error that explains how to run it.
 async function assertHttpApiRunning(): Promise<void> {
-  const palmTestFixtureSeedId = seedRemote;
-
   const notRunningMessage =
     "The http-api server with test fixtures needs to be running.\n" +
-    "👉 You can start it with `./scripts/run-http-api-with-fixtures`\n";
+    (process.env.HEARTWOOD
+      ? "👉 You can start it with `./scripts/run-httpd-with-fixtures`\n"
+      : "👉 You can start it with `./scripts/run-http-api-with-fixtures`\n");
 
   let peerId: string | undefined = undefined;
 
   try {
-    const response = await fetch(`http://0.0.0.0:${seedPort}`);
-    const data = await response.json();
-    peerId = data.peer.id;
+    if (process.env.HEARTWOOD) {
+      const response = await fetch(`http://0.0.0.0:${seedPort}/api`);
+      const data = await response.json();
+      peerId = data.node.id;
+    } else {
+      const response = await fetch(`http://0.0.0.0:${seedPort}`);
+      const data = await response.json();
+      peerId = data.peer.id;
+    }
   } catch (err) {
     console.error(err);
     throw new Error(notRunningMessage);
   }
 
-  if (peerId !== palmTestFixtureSeedId) {
+  if (peerId !== seedRemote) {
     const wrongSeedMessage = `The server on port ${seedPort} doesn't have the right fixtures.\n`;
     throw new Error(wrongSeedMessage + notRunningMessage);
   }
diff --git a/tests/unit/router.test.ts b/tests/unit/router.test.ts
index 8f4acf3f3..a6bc3d9b6 100644
--- a/tests/unit/router.test.ts
+++ b/tests/unit/router.test.ts
@@ -101,11 +101,11 @@ describe("routeToPath", () => {
         params: {
           view: { resource: "tree" },
           seed: "willow.radicle.garden",
-          id: "rad:git:hnrkmg77m8tfzj4gi4pa4mbhgysfgzwntjpao",
+          id: "rad:zKtT7DmF9H34KkvcKj9PHW19WzjT",
         },
       },
       output:
-        "/seeds/willow.radicle.garden/rad:git:hnrkmg77m8tfzj4gi4pa4mbhgysfgzwntjpao/tree",
+        "/seeds/willow.radicle.garden/rad:zKtT7DmF9H34KkvcKj9PHW19WzjT/tree",
       description: "Seed Project Route",
     },
   ])("$description", (route: any) => {
@@ -219,8 +219,7 @@ describe("pathToRoute", () => {
       description: "registrations Submit Route",
     },
     {
-      input:
-        "/seeds/willow.radicle.garden/rad:git:hnrkmg77m8tfzj4gi4pa4mbhgysfgzwntjpao",
+      input: "/seeds/willow.radicle.garden/rad:zKtT7DmF9H34KkvcKj9PHW19WzjT",
       output: {
         resource: "projects",
         params: {
@@ -228,7 +227,7 @@ describe("pathToRoute", () => {
           seed: "willow.radicle.garden",
           profile: undefined,
           peer: undefined,
-          id: "rad:git:hnrkmg77m8tfzj4gi4pa4mbhgysfgzwntjpao",
+          id: "rad:zKtT7DmF9H34KkvcKj9PHW19WzjT",
         },
       },
       description: "Seed Project Route",
diff --git a/tests/unit/utils.test.ts b/tests/unit/utils.test.ts
index 65215fee5..490697355 100644
--- a/tests/unit/utils.test.ts
+++ b/tests/unit/utils.test.ts
@@ -37,9 +37,15 @@ describe("Format functions", () => {
   });
 
   test("formatRadicleId", () => {
-    expect(
-      utils.formatRadicleId("rad:git:hnrkemobagsicpf9sr95o3g551otspcd84c9o"),
-    ).toEqual("rad:git:hnrkem…d84c9o");
+    if (process.env.HEARTWOOD) {
+      expect(utils.formatRadicleId("rad:zKtT7DmF9H34KkvcKj9PHW19WzjT")).toEqual(
+        "rad:zKtT7D…19WzjT",
+      );
+    } else {
+      expect(
+        utils.formatRadicleId("rad:git:hnrkemobagsicpf9sr95o3g551otspcd84c9o"),
+      ).toEqual("rad:git:hnrkem…d84c9o");
+    }
   });
 
   test("formatRadicleId throw when wrong ID", () => {
@@ -117,7 +123,9 @@ describe("String Assertions", () => {
   });
 
   test.each([
-    { id: "rad:git:hnrkemobagsicpf9sr95o3g551otspcd84c9o", expected: true },
+    process.env.HEARTWOOD
+      ? { id: "rad:zKtT7DmF9H34KkvcKj9PHW19WzjT", expected: true }
+      : { id: "rad:git:hnrkemobagsicpf9sr95o3g551otspcd84c9o", expected: true },
     { id: "0x1234567890123456789012345678901234567890", expected: false },
   ])("isRadicleId $id => $expected", ({ id, expected }) => {
     expect(utils.isRadicleId(id)).toEqual(expected);
diff --git a/tests/visual/landingPage.spec.ts b/tests/visual/landingPage.spec.ts
index 527e45ba3..b0846fe12 100644
--- a/tests/visual/landingPage.spec.ts
+++ b/tests/visual/landingPage.spec.ts
@@ -5,6 +5,16 @@ test.use({
 });
 
 test("landing page", async ({ page }) => {
+  await page.addInitScript(() => {
+    window.initializeTestStubs = () => {
+      window.e2eTestStubs.FakeTimers.install({
+        now: new Date("November 24 2022 12:00:00").valueOf(),
+        shouldClearNativeTimers: true,
+        shouldAdvanceTime: false,
+      });
+    };
+  });
+
   await page.addInitScript(appConfigWithFixture);
   await page.goto("/", { waitUntil: "networkidle" });
   await expect(page).toHaveScreenshot();
diff --git a/tests/visual/seed.spec.ts b/tests/visual/seed.spec.ts
index 7fa0f49bf..fcfb9218c 100644
--- a/tests/visual/seed.spec.ts
+++ b/tests/visual/seed.spec.ts
@@ -1,6 +1,16 @@
 import { test, expect } from "@tests/support/fixtures.js";
 
 test("seed page", async ({ page }) => {
+  await page.addInitScript(() => {
+    window.initializeTestStubs = () => {
+      window.e2eTestStubs.FakeTimers.install({
+        now: new Date("November 24 2022 12:00:00").valueOf(),
+        shouldClearNativeTimers: true,
+        shouldAdvanceTime: false,
+      });
+    };
+  });
+
   await page.goto("/seeds/radicle.local", { waitUntil: "networkidle" });
   await expect(page).toHaveScreenshot();
 });
diff --git a/vite.config.ts b/vite.config.ts
index 389b123a7..7165b2151 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -12,6 +12,7 @@ function defineConstants() {
   const constants = {
     VITEST: process.env.VITEST !== undefined,
     PLAYWRIGHT: process.env.PLAYWRIGHT_TEST_BASE_URL !== undefined,
+    HEARTWOOD: process.env.HEARTWOOD !== undefined,
   };
 
   // Don't overwrite HASH_ROUTING in Playwright tests, so we can control it