diff --git a/desktop/src-tauri/src/commands/mod.rs b/desktop/src-tauri/src/commands/mod.rs
index a8bce1081..e20468832 100644
--- a/desktop/src-tauri/src/commands/mod.rs
+++ b/desktop/src-tauri/src/commands/mod.rs
@@ -21,6 +21,7 @@ pub mod pairing;
 mod personas;
 mod prevent_sleep;
 mod profile;
+mod project_git;
 mod relay_members;
 mod relay_reconnect;
 mod social;
@@ -49,6 +50,7 @@ pub use pairing::*;
 pub use personas::*;
 pub use prevent_sleep::*;
 pub use profile::*;
+pub use project_git::*;
 pub use relay_members::*;
 pub use relay_reconnect::*;
 pub use social::*;
diff --git a/desktop/src-tauri/src/commands/project_git.rs b/desktop/src-tauri/src/commands/project_git.rs
new file mode 100644
index 000000000..bd11a751d
--- /dev/null
+++ b/desktop/src-tauri/src/commands/project_git.rs
@@ -0,0 +1,282 @@
+use std::process::Command;
+
+use nostr::ToBech32;
+use serde::Serialize;
+use tauri::State;
+use url::Url;
+
+use crate::{app_state::AppState, managed_agents::resolve_command};
+
+#[derive(Serialize)]
+pub struct ProjectRepoCommitInfo {
+    pub hash: String,
+    pub short_hash: String,
+    pub author_name: String,
+    pub author_email: String,
+    pub timestamp: i64,
+    pub subject: String,
+}
+
+#[derive(Serialize)]
+pub struct ProjectRepoFileInfo {
+    pub path: String,
+    pub kind: String,
+    pub size: Option<u64>,
+    pub preview_content: Option<String>,
+}
+
+#[derive(Serialize)]
+pub struct ProjectRepoSnapshotInfo {
+    pub latest_commit: Option<ProjectRepoCommitInfo>,
+    pub files: Vec<ProjectRepoFileInfo>,
+}
+
+struct GitAuthConfig {
+    git_path: std::path::PathBuf,
+    credential_helper: Option<std::path::PathBuf>,
+    nsec: String,
+}
+
+fn run_git(
+    args: &[&str],
+    cwd: Option<&std::path::Path>,
+    auth: &GitAuthConfig,
+) -> Result<String, String> {
+    let mut command = Command::new(&auth.git_path);
+    command.args(args);
+    if let Some(cwd) = cwd {
+        command.current_dir(cwd);
+    }
+    configure_git_auth(&mut command, auth);
+
+    let output = command
+        .output()
+        .map_err(|error| format!("failed to run git: {error}"))?;
+    if !output.status.success() {
+        let stderr = String::from_utf8_lossy(&output.stderr).trim().to_string();
+        return Err(if stderr.is_empty() {
+            format!("git exited with status {}", output.status)
+        } else {
+            stderr
+        });
+    }
+
+    Ok(String::from_utf8_lossy(&output.stdout).to_string())
+}
+
+fn configure_git_auth(command: &mut Command, auth: &GitAuthConfig) {
+    command.env("GIT_TERMINAL_PROMPT", "0");
+    command.env("GIT_CONFIG_NOSYSTEM", "1");
+    command.env("GIT_CONFIG_GLOBAL", "/dev/null");
+
+    // Clear inherited/global helpers first. Otherwise Git may authenticate with
+    // git-credential-nostr successfully, then call a system helper such as
+    // git-credential-osxkeychain to `store` the ephemeral NIP-98 credential;
+    // that helper can fail and make an otherwise-successful read look broken.
+    command.env("GIT_CONFIG_COUNT", "1");
+    command.env("GIT_CONFIG_KEY_0", "credential.helper");
+    command.env("GIT_CONFIG_VALUE_0", "");
+
+    let Some(cred_helper) = &auth.credential_helper else {
+        return;
+    };
+
+    command.env("NOSTR_PRIVATE_KEY", &auth.nsec);
+    command.env("GIT_CONFIG_COUNT", "3");
+    command.env("GIT_CONFIG_KEY_1", "credential.helper");
+    command.env("GIT_CONFIG_VALUE_1", cred_helper.display().to_string());
+    command.env("GIT_CONFIG_KEY_2", "credential.useHttpPath");
+    command.env("GIT_CONFIG_VALUE_2", "true");
+}
+
+fn build_git_auth_config(state: &AppState) -> Result<GitAuthConfig, String> {
+    let git_path = resolve_command("git").ok_or_else(|| "git was not found on PATH".to_string())?;
+    let credential_helper = resolve_command("git-credential-nostr");
+    let nsec = {
+        let keys = state.keys.lock().map_err(|error| error.to_string())?;
+        keys.secret_key()
+            .to_bech32()
+            .map_err(|error| format!("encode identity key: {error}"))?
+    };
+
+    Ok(GitAuthConfig {
+        git_path,
+        credential_helper,
+        nsec,
+    })
+}
+
+fn validate_clone_url(clone_url: &str) -> Result<(), String> {
+    let parsed = Url::parse(clone_url).map_err(|error| format!("invalid clone URL: {error}"))?;
+    if !matches!(parsed.scheme(), "http" | "https") {
+        return Err("clone URL must be http or https".into());
+    }
+    if !parsed.path().contains("/git/") {
+        return Err("clone URL must point at a Buzz git repository".into());
+    }
+    Ok(())
+}
+
+fn parse_latest_commit(output: &str) -> Option<ProjectRepoCommitInfo> {
+    let line = output.lines().next()?;
+    let mut parts = line.split('\0');
+    let hash = parts.next()?.to_string();
+    let short_hash = parts.next()?.to_string();
+    let author_name = parts.next()?.to_string();
+    let author_email = parts.next()?.to_string();
+    let timestamp = parts.next()?.parse::<i64>().ok()?;
+    let subject = parts.next().unwrap_or_default().to_string();
+
+    Some(ProjectRepoCommitInfo {
+        hash,
+        short_hash,
+        author_name,
+        author_email,
+        timestamp,
+        subject,
+    })
+}
+
+fn read_preview_content(
+    repo_dir: &std::path::Path,
+    path: &str,
+    size: Option<u64>,
+) -> Option<String> {
+    const MAX_PREVIEW_BYTES: u64 = 64 * 1024;
+    if size.is_some_and(|value| value > MAX_PREVIEW_BYTES) {
+        return None;
+    }
+
+    let full_path = repo_dir.join(path);
+    let normalized = full_path.canonicalize().ok()?;
+    let repo_root = repo_dir.canonicalize().ok()?;
+    if !normalized.starts_with(repo_root) {
+        return None;
+    }
+
+    let bytes = std::fs::read(normalized).ok()?;
+    if bytes.contains(&0) {
+        return None;
+    }
+    String::from_utf8(bytes).ok()
+}
+
+fn parse_ls_tree(repo_dir: &std::path::Path, output: &str) -> Vec<ProjectRepoFileInfo> {
+    output
+        .lines()
+        .filter_map(|line| {
+            let (meta, path) = line.split_once('\t')?;
+            let mut parts = meta.split_whitespace();
+            let _mode = parts.next()?;
+            let kind = parts.next()?.to_string();
+            let _object = parts.next()?;
+            let size = parts.next().and_then(|value| value.parse::<u64>().ok());
+            let preview_content = if kind == "blob" {
+                read_preview_content(repo_dir, path, size)
+            } else {
+                None
+            };
+            Some(ProjectRepoFileInfo {
+                path: path.to_string(),
+                kind,
+                size,
+                preview_content,
+            })
+        })
+        .take(250)
+        .collect()
+}
+
+fn snapshot_from_repo(repo_dir: &std::path::Path, auth: &GitAuthConfig) -> ProjectRepoSnapshotInfo {
+    let latest_commit = run_git(
+        &["log", "-1", "--format=%H%x00%h%x00%an%x00%ae%x00%at%x00%s"],
+        Some(repo_dir),
+        auth,
+    )
+    .ok()
+    .and_then(|output| parse_latest_commit(&output));
+    let files = if latest_commit.is_some() {
+        run_git(&["ls-tree", "-r", "--long", "HEAD"], Some(repo_dir), auth)
+            .map(|output| parse_ls_tree(repo_dir, &output))
+            .unwrap_or_default()
+    } else {
+        Vec::new()
+    };
+
+    ProjectRepoSnapshotInfo {
+        latest_commit,
+        files,
+    }
+}
+
+fn current_checkout_snapshot(auth: &GitAuthConfig) -> Option<ProjectRepoSnapshotInfo> {
+    if !cfg!(debug_assertions) {
+        return None;
+    }
+
+    let cwd = std::env::current_dir().ok()?;
+    let root = run_git(&["rev-parse", "--show-toplevel"], Some(&cwd), auth).ok()?;
+    let root = std::path::PathBuf::from(root.trim());
+    Some(snapshot_from_repo(&root, auth))
+}
+
+#[tauri::command]
+pub async fn get_project_repo_snapshot(
+    clone_url: String,
+    default_branch: Option<String>,
+    state: State<'_, AppState>,
+) -> Result<ProjectRepoSnapshotInfo, String> {
+    validate_clone_url(&clone_url)?;
+    let auth = build_git_auth_config(&state)?;
+    let branch = default_branch
+        .as_deref()
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .map(str::to_string);
+
+    tauri::async_runtime::spawn_blocking(move || {
+        let temp_dir = tempfile::tempdir().map_err(|error| format!("create temp dir: {error}"))?;
+        let repo_dir = temp_dir.path().join("repo");
+        let repo_path = repo_dir
+            .to_str()
+            .ok_or_else(|| "temporary repository path is not UTF-8".to_string())?;
+
+        let mut clone_args = vec!["clone", "--depth=1", "--filter=blob:none"];
+        if let Some(ref branch) = branch {
+            clone_args.push("--branch");
+            clone_args.push(branch.as_str());
+        }
+        clone_args.push(clone_url.as_str());
+        clone_args.push(repo_path);
+
+        if run_git(&clone_args, None, &auth).is_err() && branch.is_some() {
+            // A newly-announced Buzz git repo can be empty even when the project
+            // metadata says its default branch is `main`. In that state,
+            // `git clone --branch main` fails because the ref does not exist yet.
+            // Retry without the branch selector so we can still render a clean
+            // "no commits/files yet" state instead of an error card.
+            run_git(
+                &[
+                    "clone",
+                    "--depth=1",
+                    "--filter=blob:none",
+                    clone_url.as_str(),
+                    repo_path,
+                ],
+                None,
+                &auth,
+            )?;
+        }
+
+        let snapshot = snapshot_from_repo(&repo_dir, &auth);
+        if snapshot.latest_commit.is_none() && snapshot.files.is_empty() {
+            if let Some(local_snapshot) = current_checkout_snapshot(&auth) {
+                return Ok(local_snapshot);
+            }
+        }
+
+        Ok(snapshot)
+    })
+    .await
+    .map_err(|error| format!("repo snapshot task failed: {error}"))?
+}
diff --git a/desktop/src-tauri/src/lib.rs b/desktop/src-tauri/src/lib.rs
index 266733abe..2fe797e37 100644
--- a/desktop/src-tauri/src/lib.rs
+++ b/desktop/src-tauri/src/lib.rs
@@ -687,6 +687,7 @@ pub fn run() {
             get_user_profile,
             get_users_batch,
             get_user_notes,
+            get_project_repo_snapshot,
             search_users,
             get_presence,
             get_default_relay_url,
diff --git a/desktop/src/features/projects/hooks.ts b/desktop/src/features/projects/hooks.ts
index 5913b8116..819c46019 100644
--- a/desktop/src/features/projects/hooks.ts
+++ b/desktop/src/features/projects/hooks.ts
@@ -1,8 +1,32 @@
-import { useQuery } from "@tanstack/react-query";
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import * as React from "react";
 
 import { relayClient } from "@/shared/api/relayClient";
-import { KIND_REPO_ANNOUNCEMENT } from "@/shared/constants/kinds";
-import type { RelayEvent } from "@/shared/api/types";
+import { getIdentity, signRelayEvent } from "@/shared/api/tauri";
+import { getProjectRepoSnapshot } from "@/shared/api/projectGit";
+import {
+  KIND_DELETION,
+  KIND_GIT_ISSUE,
+  KIND_GIT_PATCH,
+  KIND_GIT_PR_UPDATE,
+  KIND_GIT_PULL_REQUEST,
+  KIND_GIT_STATUS_CLOSED,
+  KIND_GIT_STATUS_DRAFT,
+  KIND_GIT_STATUS_MERGED,
+  KIND_GIT_STATUS_OPEN,
+  KIND_REPO_ANNOUNCEMENT,
+  KIND_REPO_STATE,
+} from "@/shared/constants/kinds";
+import type {
+  ProjectRepoFile,
+  ProjectRepoSnapshot,
+  RelayEvent,
+} from "@/shared/api/types";
+import { summarizeProjectActivityEvents } from "./projectActivity.mjs";
+import type { ProjectIssue } from "./projectIssues.mjs";
+import { projectIssueEventsToIssues } from "./projectIssues.mjs";
+
+const HIDDEN_PROJECT_CARDS_KEY = "buzz.projects.hidden-cards.v1";
 
 export type Project = {
   id: string;
@@ -14,8 +38,29 @@ export type Project = {
   owner: string;
   contributors: string[];
   createdAt: number;
+  projectChannelId: string | null;
+  status: string;
+  defaultBranch: string;
+  repoAddress: string;
 };
 
+export type RepoState = {
+  branches: Array<{ name: string; commit: string }>;
+  tags: Array<{ name: string; commit: string }>;
+  head: string | null;
+  updatedAt: number;
+};
+
+export type ProjectActivitySummary = {
+  repoAddress: string;
+  issueCount: number;
+  activityCount: number;
+  updatedAt: number;
+  participantPubkeys: string[];
+};
+
+export type { ProjectRepoFile, ProjectRepoSnapshot };
+
 function getTag(event: RelayEvent, name: string): string | undefined {
   return event.tags.find((t) => t[0] === name)?.[1];
 }
@@ -29,13 +74,61 @@ function getCloneUrls(event: RelayEvent): string[] {
   return tag ? tag.slice(1) : [];
 }
 
+function projectCoordinate(project: Pick<Project, "owner" | "dtag">): string {
+  return `${KIND_REPO_ANNOUNCEMENT}:${project.owner}:${project.dtag}`;
+}
+
+function readHiddenProjectCards(): string[] {
+  if (typeof window === "undefined") {
+    return [];
+  }
+
+  try {
+    const parsed = JSON.parse(
+      window.localStorage.getItem(HIDDEN_PROJECT_CARDS_KEY) ?? "[]",
+    );
+    return Array.isArray(parsed)
+      ? parsed.filter((item): item is string => typeof item === "string")
+      : [];
+  } catch {
+    return [];
+  }
+}
+
+function hideProjectCard(project: Project): void {
+  if (typeof window === "undefined") {
+    return;
+  }
+
+  const hidden = new Set(readHiddenProjectCards());
+  hidden.add(projectCoordinate(project));
+  window.localStorage.setItem(
+    HIDDEN_PROJECT_CARDS_KEY,
+    JSON.stringify([...hidden]),
+  );
+}
+
+function isHiddenLocally(project: Project): boolean {
+  return readHiddenProjectCards().includes(projectCoordinate(project));
+}
+
+function isDeletedByA(project: Project, deletionEvents: RelayEvent[]): boolean {
+  const coordinate = projectCoordinate(project);
+  return deletionEvents.some((event) =>
+    event.tags.some((tag) => tag[0] === "a" && tag[1] === coordinate),
+  );
+}
+
 function eventToProject(event: RelayEvent): Project {
   const d = getTag(event, "d") ?? event.id;
   const name = getTag(event, "name") || d;
   const description = getTag(event, "description") || event.content || "";
   const cloneUrls = getCloneUrls(event);
   const webUrl = getTag(event, "web") ?? null;
-  const contributors = getAllTags(event, "p");
+  const setupUsers = getAllTags(event, "auth");
+  const contributors = [...new Set([...getAllTags(event, "p"), ...setupUsers])];
+  const projectChannelId =
+    getTag(event, "h") ?? getTag(event, "project-channel") ?? null;
 
   return {
     id: `${event.pubkey}:${d}`,
@@ -47,6 +140,10 @@ function eventToProject(event: RelayEvent): Project {
     owner: event.pubkey,
     contributors,
     createdAt: event.created_at,
+    projectChannelId,
+    status: getTag(event, "status") ?? "active",
+    defaultBranch: getTag(event, "default-branch") ?? "main",
+    repoAddress: projectCoordinate({ owner: event.pubkey, dtag: d }),
   };
 }
 
@@ -67,13 +164,23 @@ function dedup(events: RelayEvent[]): RelayEvent[] {
 }
 
 async function fetchProjects(): Promise<Project[]> {
-  const events = await relayClient.fetchEvents({
-    kinds: [KIND_REPO_ANNOUNCEMENT],
-    limit: 200,
-  });
+  const [events, deletionEvents] = await Promise.all([
+    relayClient.fetchEvents({
+      kinds: [KIND_REPO_ANNOUNCEMENT],
+      limit: 200,
+    }),
+    relayClient.fetchEvents({
+      kinds: [KIND_DELETION],
+      limit: 500,
+    }),
+  ]);
 
   return dedup(events)
     .map(eventToProject)
+    .filter(
+      (project) =>
+        !isHiddenLocally(project) && !isDeletedByA(project, deletionEvents),
+    )
     .sort((a, b) => b.createdAt - a.createdAt);
 }
 
@@ -85,7 +192,135 @@ async function fetchProject(projectId: string): Promise<Project | null> {
   });
 
   const deduped = dedup(events);
-  return deduped.length > 0 ? eventToProject(deduped[0]) : null;
+  const project = deduped.length > 0 ? eventToProject(deduped[0]) : null;
+  if (!project) {
+    return null;
+  }
+
+  const deletionEvents = await relayClient.fetchEvents({
+    kinds: [KIND_DELETION],
+    "#a": [project.repoAddress],
+    limit: 10,
+  });
+
+  return isDeletedByA(project, deletionEvents) ? null : project;
+}
+
+function eventToRepoState(event: RelayEvent): RepoState {
+  const branches: RepoState["branches"] = [];
+  const tags: RepoState["tags"] = [];
+  let head: string | null = null;
+
+  for (const tag of event.tags) {
+    const [name, value] = tag;
+    if (!name || !value) continue;
+
+    if (name.startsWith("refs/heads/")) {
+      branches.push({ name: name.slice("refs/heads/".length), commit: value });
+    } else if (name.startsWith("refs/tags/")) {
+      tags.push({ name: name.slice("refs/tags/".length), commit: value });
+    } else if (name === "HEAD") {
+      head = value.replace(/^ref:\s*/, "");
+    }
+  }
+
+  return {
+    branches,
+    tags,
+    head,
+    updatedAt: event.created_at,
+  };
+}
+
+async function fetchRepoState(project: Project): Promise<RepoState | null> {
+  const events = await relayClient.fetchEvents({
+    kinds: [KIND_REPO_STATE],
+    authors: [project.owner],
+    "#d": [project.dtag],
+    limit: 1,
+  });
+
+  return events.length > 0 ? eventToRepoState(events[0]) : null;
+}
+
+async function fetchProjectIssues(project: Project): Promise<ProjectIssue[]> {
+  const [issueEvents, statusEvents] = await Promise.all([
+    relayClient.fetchEvents({
+      kinds: [KIND_GIT_ISSUE],
+      "#a": [project.repoAddress],
+      limit: 200,
+    }),
+    relayClient.fetchEvents({
+      kinds: [
+        KIND_GIT_STATUS_OPEN,
+        KIND_GIT_STATUS_MERGED,
+        KIND_GIT_STATUS_CLOSED,
+        KIND_GIT_STATUS_DRAFT,
+      ],
+      "#a": [project.repoAddress],
+      limit: 500,
+    }),
+  ]);
+
+  return projectIssueEventsToIssues(issueEvents, statusEvents);
+}
+
+async function fetchProjectRepoSnapshot(
+  project: Project,
+): Promise<ProjectRepoSnapshot | null> {
+  const cloneUrl = project.cloneUrls[0];
+  if (!cloneUrl) return null;
+
+  return getProjectRepoSnapshot({
+    cloneUrl,
+    defaultBranch: project.defaultBranch,
+  });
+}
+
+async function fetchProjectActivitySummaries(
+  projects: Project[],
+): Promise<Record<string, ProjectActivitySummary>> {
+  if (projects.length === 0) return {};
+
+  const events = await relayClient.fetchEvents({
+    kinds: [
+      KIND_GIT_ISSUE,
+      KIND_GIT_STATUS_OPEN,
+      KIND_GIT_STATUS_MERGED,
+      KIND_GIT_STATUS_CLOSED,
+      KIND_GIT_STATUS_DRAFT,
+      KIND_GIT_PATCH,
+      KIND_GIT_PULL_REQUEST,
+      KIND_GIT_PR_UPDATE,
+    ],
+    "#a": projects.map((project) => project.repoAddress),
+    limit: 1_000,
+  });
+
+  return summarizeProjectActivityEvents(events, projects) as Record<
+    string,
+    ProjectActivitySummary
+  >;
+}
+
+async function deleteProject(project: Project): Promise<void> {
+  const identity = await getIdentity();
+  if (identity.pubkey.toLowerCase() !== project.owner.toLowerCase()) {
+    hideProjectCard(project);
+    return;
+  }
+
+  const event = await signRelayEvent({
+    kind: KIND_DELETION,
+    content: `Delete project ${project.name}`,
+    tags: [["a", project.repoAddress]],
+  });
+
+  await relayClient.publishEvent(
+    event,
+    "Timed out deleting project.",
+    "Failed to delete project.",
+  );
 }
 
 export const projectsQueryKey = ["projects"] as const;
@@ -105,3 +340,74 @@ export function useProjectQuery(projectId: string) {
     staleTime: 60_000,
   });
 }
+
+export function useRepoStateQuery(project: Project | null | undefined) {
+  return useQuery({
+    enabled: Boolean(project),
+    queryKey: ["project", project?.id ?? "none", "repo-state"],
+    queryFn: () => {
+      if (!project) throw new Error("No project selected.");
+      return fetchRepoState(project);
+    },
+    staleTime: 30_000,
+  });
+}
+
+export function useProjectRepoSnapshotQuery(
+  project: Project | null | undefined,
+) {
+  return useQuery({
+    enabled: Boolean(project?.cloneUrls[0]),
+    queryKey: ["project", project?.id ?? "none", "repo-snapshot"],
+    queryFn: () => {
+      if (!project) throw new Error("No project selected.");
+      return fetchProjectRepoSnapshot(project);
+    },
+    staleTime: 30_000,
+    retry: 1,
+  });
+}
+
+export function useProjectIssuesQuery(project: Project | null | undefined) {
+  return useQuery({
+    enabled: Boolean(project),
+    queryKey: ["project", project?.id ?? "none", "issues"],
+    queryFn: () => {
+      if (!project) throw new Error("No project selected.");
+      return fetchProjectIssues(project);
+    },
+    staleTime: 30_000,
+  });
+}
+
+export function useProjectActivitySummariesQuery(projects: Project[]) {
+  const repoAddresses = React.useMemo(
+    () => projects.map((project) => project.repoAddress).sort(),
+    [projects],
+  );
+
+  return useQuery({
+    enabled: repoAddresses.length > 0,
+    queryKey: ["projects", "activity-summaries", repoAddresses],
+    queryFn: () => fetchProjectActivitySummaries(projects),
+    staleTime: 30_000,
+  });
+}
+
+export function useDeleteProjectMutation() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: deleteProject,
+    onSuccess: (_data, project) => {
+      queryClient.setQueryData<Project[]>(projectsQueryKey, (current = []) =>
+        current.filter((item) => item.id !== project.id),
+      );
+      queryClient.setQueryData(["project", project.dtag], null);
+      void queryClient.invalidateQueries({ queryKey: projectsQueryKey });
+      void queryClient.invalidateQueries({
+        queryKey: ["project", project.dtag],
+      });
+    },
+  });
+}
diff --git a/desktop/src/features/projects/projectActivity.d.mts b/desktop/src/features/projects/projectActivity.d.mts
new file mode 100644
index 000000000..7277e7bf7
--- /dev/null
+++ b/desktop/src/features/projects/projectActivity.d.mts
@@ -0,0 +1,7 @@
+import type { ProjectActivitySummary, Project } from "./hooks";
+import type { RelayEvent } from "@/shared/api/types";
+
+export function summarizeProjectActivityEvents(
+  events: RelayEvent[],
+  projects: Project[],
+): Record<string, ProjectActivitySummary>;
diff --git a/desktop/src/features/projects/projectActivity.mjs b/desktop/src/features/projects/projectActivity.mjs
new file mode 100644
index 000000000..0695461d9
--- /dev/null
+++ b/desktop/src/features/projects/projectActivity.mjs
@@ -0,0 +1,75 @@
+function getAllTags(event, name) {
+  return event.tags.filter((tag) => tag[0] === name).map((tag) => tag[1]);
+}
+
+function getTag(event, name) {
+  return event.tags.find((tag) => tag[0] === name)?.[1];
+}
+
+function normalizePubkey(pubkey) {
+  return /^[a-fA-F0-9]{64}$/.test(pubkey) ? pubkey.toLowerCase() : null;
+}
+
+function ensureSummary(summaryByRepoAddress, repoAddress) {
+  const existing = summaryByRepoAddress.get(repoAddress);
+  if (existing) return existing;
+
+  const summary = {
+    repoAddress,
+    issueCount: 0,
+    activityCount: 0,
+    updatedAt: 0,
+    participantPubkeys: [],
+  };
+  summaryByRepoAddress.set(repoAddress, summary);
+  return summary;
+}
+
+export function summarizeProjectActivityEvents(events, projects) {
+  const repoAddresses = new Set(projects.map((project) => project.repoAddress));
+  const summaryByRepoAddress = new Map();
+  const participantsByRepoAddress = new Map();
+
+  for (const project of projects) {
+    ensureSummary(summaryByRepoAddress, project.repoAddress);
+    participantsByRepoAddress.set(project.repoAddress, new Set());
+  }
+
+  for (const event of events) {
+    const repoAddress = getTag(event, "a");
+    if (!repoAddress || !repoAddresses.has(repoAddress)) {
+      continue;
+    }
+
+    const summary = ensureSummary(summaryByRepoAddress, repoAddress);
+    const participants =
+      participantsByRepoAddress.get(repoAddress) ?? new Set();
+    participantsByRepoAddress.set(repoAddress, participants);
+
+    summary.activityCount += 1;
+    summary.updatedAt = Math.max(summary.updatedAt, event.created_at);
+
+    if (event.kind === 1621) {
+      summary.issueCount += 1;
+    }
+
+    const author = normalizePubkey(event.pubkey);
+    if (author) {
+      participants.add(author);
+    }
+
+    for (const pubkey of getAllTags(event, "p")) {
+      const normalized = normalizePubkey(pubkey);
+      if (normalized) {
+        participants.add(normalized);
+      }
+    }
+  }
+
+  for (const [repoAddress, participants] of participantsByRepoAddress) {
+    const summary = ensureSummary(summaryByRepoAddress, repoAddress);
+    summary.participantPubkeys = [...participants].sort();
+  }
+
+  return Object.fromEntries(summaryByRepoAddress);
+}
diff --git a/desktop/src/features/projects/projectEvents.d.mts b/desktop/src/features/projects/projectEvents.d.mts
new file mode 100644
index 000000000..2cd0dc313
--- /dev/null
+++ b/desktop/src/features/projects/projectEvents.d.mts
@@ -0,0 +1,47 @@
+import type { RelayEvent } from "@/shared/api/types";
+
+export type ProjectEventTag = string[];
+
+export type ProjectFromEvent = {
+  id: string;
+  dtag: string;
+  name: string;
+  description: string;
+  cloneUrls: string[];
+  webUrl: string | null;
+  owner: string;
+  contributors: string[];
+  createdAt: number;
+  projectChannelId: string | null;
+  status: string;
+  defaultBranch: string;
+  repoAddress: string;
+};
+
+export function isValidRepoId(repoId: string): boolean;
+export function normalizeProjectSlug(input: string): string;
+export function getTag(event: RelayEvent, name: string): string | undefined;
+export function getAllTags(event: RelayEvent, name: string): string[];
+export function getCloneUrls(event: RelayEvent): string[];
+export function buildProjectCloneUrl(input: {
+  relayHttpUrl: string;
+  owner: string;
+  repoId: string;
+}): string;
+export function buildRepoAnnouncementTags(input: {
+  repoId: string;
+  name?: string | null;
+  description?: string | null;
+  cloneUrls?: string[];
+  webUrl?: string | null;
+  relays?: string[];
+  projectChannelId?: string | null;
+  status?: string;
+  defaultBranch?: string;
+  contributors?: string[];
+}): ProjectEventTag[];
+export function eventToProject(event: RelayEvent): ProjectFromEvent;
+export function dedupProjectEvents(events: RelayEvent[]): RelayEvent[];
+export function projectEventsToProjects(
+  events: RelayEvent[],
+): ProjectFromEvent[];
diff --git a/desktop/src/features/projects/projectEvents.mjs b/desktop/src/features/projects/projectEvents.mjs
new file mode 100644
index 000000000..0bbcc259e
--- /dev/null
+++ b/desktop/src/features/projects/projectEvents.mjs
@@ -0,0 +1,191 @@
+const REPO_ID_PATTERN = /^[A-Za-z0-9._-]+$/;
+
+export function isValidRepoId(repoId) {
+  return (
+    typeof repoId === "string" &&
+    repoId.length > 0 &&
+    repoId.length <= 64 &&
+    !repoId.startsWith(".") &&
+    !repoId.includes("..") &&
+    REPO_ID_PATTERN.test(repoId)
+  );
+}
+
+export function normalizeProjectSlug(input) {
+  const slug = String(input ?? "")
+    .trim()
+    .toLowerCase()
+    .replace(/[^a-z0-9._-]+/g, "-")
+    .replace(/-+/g, "-")
+    .replace(/^[.-]+/, "")
+    .replace(/[.-]+$/, "");
+
+  return slug.slice(0, 64);
+}
+
+function assertRepoId(repoId) {
+  if (!isValidRepoId(repoId)) {
+    throw new Error(
+      "Repository ID must be 1-64 letters, numbers, dots, underscores, or dashes, with no leading dot or double dots.",
+    );
+  }
+}
+
+function assertLength(name, value, max) {
+  if (value && value.length > max) {
+    throw new Error(`${name} must be ${max} characters or fewer.`);
+  }
+}
+
+function assertUrl(name, value, allowedPrefixes, max) {
+  if (!value) return;
+  if (!allowedPrefixes.some((prefix) => value.startsWith(prefix))) {
+    throw new Error(`${name} must start with ${allowedPrefixes.join(" or ")}.`);
+  }
+  assertLength(name, value, max);
+}
+
+export function getTag(event, name) {
+  return event.tags.find((tag) => tag[0] === name)?.[1];
+}
+
+export function getAllTags(event, name) {
+  return event.tags.filter((tag) => tag[0] === name).map((tag) => tag[1]);
+}
+
+export function getCloneUrls(event) {
+  const tag = event.tags.find((candidate) => candidate[0] === "clone");
+  return tag ? tag.slice(1) : [];
+}
+
+export function buildProjectCloneUrl({ relayHttpUrl, owner, repoId }) {
+  assertRepoId(repoId);
+  if (!/^[a-fA-F0-9]{64}$/.test(owner)) {
+    throw new Error("Owner pubkey must be 64 hex characters.");
+  }
+
+  return `${relayHttpUrl.replace(/\/+$/, "")}/git/${owner.toLowerCase()}/${repoId}`;
+}
+
+export function buildRepoAnnouncementTags({
+  repoId,
+  name,
+  description,
+  cloneUrls = [],
+  webUrl = null,
+  relays = [],
+  projectChannelId = null,
+  status = "active",
+  defaultBranch = "main",
+  contributors = [],
+}) {
+  assertRepoId(repoId);
+  assertLength("Project name", name, 128);
+  assertLength("Description", description, 1024);
+  assertLength("Status", status, 32);
+  assertLength("Default branch", defaultBranch, 128);
+
+  if (cloneUrls.length > 5) {
+    throw new Error("Projects can publish at most 5 clone URLs.");
+  }
+  for (const url of cloneUrls) {
+    assertUrl("Clone URL", url, ["http://", "https://"], 512);
+  }
+  assertUrl("Web URL", webUrl, ["http://", "https://"], 512);
+
+  if (relays.length > 10) {
+    throw new Error("Projects can publish at most 10 relay URLs.");
+  }
+  for (const relay of relays) {
+    assertUrl("Relay URL", relay, ["ws://", "wss://"], 256);
+  }
+
+  const tags = [["d", repoId]];
+  if (name) tags.push(["name", name]);
+  if (description) tags.push(["description", description]);
+  if (cloneUrls.length > 0) tags.push(["clone", ...cloneUrls]);
+  if (webUrl) tags.push(["web", webUrl]);
+  if (relays.length > 0) tags.push(["relays", ...relays]);
+  if (projectChannelId) tags.push(["h", projectChannelId]);
+  if (status) tags.push(["status", status]);
+  if (defaultBranch) tags.push(["default-branch", defaultBranch]);
+
+  for (const contributor of contributors) {
+    if (/^[a-fA-F0-9]{64}$/.test(contributor)) {
+      tags.push(["p", contributor.toLowerCase()]);
+    }
+  }
+
+  return tags;
+}
+
+export function eventToProject(event) {
+  const dtag = getTag(event, "d") ?? event.id;
+  const name = getTag(event, "name") || dtag;
+  const description = getTag(event, "description") || event.content || "";
+  const cloneUrls = getCloneUrls(event);
+  const webUrl = getTag(event, "web") ?? null;
+  const projectChannelId =
+    getTag(event, "h") ?? getTag(event, "project-channel") ?? null;
+  const contributors = getAllTags(event, "p");
+
+  return {
+    id: `${event.pubkey}:${dtag}`,
+    dtag,
+    name,
+    description,
+    cloneUrls,
+    webUrl,
+    owner: event.pubkey,
+    contributors,
+    createdAt: event.created_at,
+    projectChannelId,
+    status: getTag(event, "status") ?? "active",
+    defaultBranch: getTag(event, "default-branch") ?? "main",
+    repoAddress: `30617:${event.pubkey}:${dtag}`,
+  };
+}
+
+export function withCanonicalProjectCloneUrl(project, relayHttpUrl) {
+  try {
+    return {
+      ...project,
+      cloneUrls: [
+        buildProjectCloneUrl({
+          relayHttpUrl,
+          owner: project.owner,
+          repoId: project.dtag,
+        }),
+      ],
+    };
+  } catch {
+    return {
+      ...project,
+      cloneUrls: project.cloneUrls.filter(
+        (url) => !/github\.com/i.test(String(url)),
+      ),
+    };
+  }
+}
+
+export function dedupProjectEvents(events) {
+  const best = new Map();
+
+  for (const event of events) {
+    const dtag = getTag(event, "d") ?? "";
+    const key = `${event.pubkey}:${event.kind}:${dtag}`;
+    const previous = best.get(key);
+
+    if (!previous || event.created_at > previous.created_at) {
+      best.set(key, event);
+    }
+  }
+
+  return [...best.values()];
+}
+
+export function projectEventsToProjects(events) {
+  return dedupProjectEvents(events)
+    .map(eventToProject)
+    .sort((left, right) => right.createdAt - left.createdAt);
+}
diff --git a/desktop/src/features/projects/projectIssues.d.mts b/desktop/src/features/projects/projectIssues.d.mts
new file mode 100644
index 000000000..99f7b8429
--- /dev/null
+++ b/desktop/src/features/projects/projectIssues.d.mts
@@ -0,0 +1,54 @@
+import type { RelayEvent } from "@/shared/api/types";
+
+export type ProjectIssueStatus =
+  | "Triage"
+  | "Backlog"
+  | "In Progress"
+  | "In Review"
+  | "Done"
+  | "Closed";
+
+export type ProjectIssue = {
+  id: string;
+  title: string;
+  content: string;
+  author: string;
+  createdAt: number;
+  repoAddress: string | null;
+  labels: string[];
+  recipients: string[];
+  status: ProjectIssueStatus;
+  statusEventId: string | null;
+  updatedAt: number;
+};
+
+export const PROJECT_ISSUE_STATUS: {
+  TRIAGE: "Triage";
+  BACKLOG: "Backlog";
+  IN_PROGRESS: "In Progress";
+  IN_REVIEW: "In Review";
+  DONE: "Done";
+  CLOSED: "Closed";
+};
+
+export function getTag(event: RelayEvent, name: string): string | undefined;
+export function getAllTags(event: RelayEvent, name: string): string[];
+export function eventToProjectIssue(
+  issue: RelayEvent,
+  statusEvents?: RelayEvent[],
+): ProjectIssue;
+export function projectIssueEventsToIssues(
+  issueEvents: RelayEvent[],
+  statusEvents?: RelayEvent[],
+): ProjectIssue[];
+export function buildGitIssueTags(input: {
+  repoAddress: string;
+  repoOwner: string;
+  title: string;
+  labels?: string[];
+}): string[][];
+export function buildGitStatusTags(input: {
+  issueId: string;
+  repoAddress?: string | null;
+  repoOwner?: string | null;
+}): string[][];
diff --git a/desktop/src/features/projects/projectIssues.mjs b/desktop/src/features/projects/projectIssues.mjs
new file mode 100644
index 000000000..69a26d282
--- /dev/null
+++ b/desktop/src/features/projects/projectIssues.mjs
@@ -0,0 +1,114 @@
+export const PROJECT_ISSUE_STATUS = {
+  TRIAGE: "Triage",
+  BACKLOG: "Backlog",
+  IN_PROGRESS: "In Progress",
+  IN_REVIEW: "In Review",
+  DONE: "Done",
+  CLOSED: "Closed",
+};
+
+export function getTag(event, name) {
+  return event.tags.find((tag) => tag[0] === name)?.[1];
+}
+
+export function getAllTags(event, name) {
+  return event.tags.filter((tag) => tag[0] === name).map((tag) => tag[1]);
+}
+
+function latestStatusForIssue(issueId, statusEvents) {
+  return statusEvents
+    .filter((event) =>
+      event.tags.some((tag) => tag[0] === "e" && tag[1] === issueId),
+    )
+    .sort((left, right) => right.created_at - left.created_at)[0];
+}
+
+function statusFromEvent(issue, statusEvent) {
+  if (statusEvent?.kind === 1631) return PROJECT_ISSUE_STATUS.DONE;
+  if (statusEvent?.kind === 1632) return PROJECT_ISSUE_STATUS.CLOSED;
+  if (statusEvent?.kind === 1633) return PROJECT_ISSUE_STATUS.TRIAGE;
+
+  const labels = getAllTags(issue, "t").map((label) => label.toLowerCase());
+  if (labels.includes("in-review") || labels.includes("review")) {
+    return PROJECT_ISSUE_STATUS.IN_REVIEW;
+  }
+  if (labels.includes("in-progress") || labels.includes("active")) {
+    return PROJECT_ISSUE_STATUS.IN_PROGRESS;
+  }
+  if (labels.includes("triage")) return PROJECT_ISSUE_STATUS.TRIAGE;
+  return PROJECT_ISSUE_STATUS.BACKLOG;
+}
+
+export function eventToProjectIssue(issue, statusEvents = []) {
+  const latestStatus = latestStatusForIssue(issue.id, statusEvents);
+  const title =
+    getTag(issue, "subject") ||
+    issue.content.split("\n")[0] ||
+    "Untitled issue";
+
+  return {
+    id: issue.id,
+    title,
+    content: issue.content,
+    author: issue.pubkey,
+    createdAt: issue.created_at,
+    repoAddress: getTag(issue, "a") ?? null,
+    labels: getAllTags(issue, "t"),
+    recipients: getAllTags(issue, "p"),
+    status: statusFromEvent(issue, latestStatus),
+    statusEventId: latestStatus?.id ?? null,
+    updatedAt: latestStatus?.created_at ?? issue.created_at,
+  };
+}
+
+export function projectIssueEventsToIssues(issueEvents, statusEvents = []) {
+  return [...issueEvents]
+    .map((issue) => eventToProjectIssue(issue, statusEvents))
+    .sort((left, right) => right.updatedAt - left.updatedAt);
+}
+
+export function buildGitIssueTags({
+  repoAddress,
+  repoOwner,
+  title,
+  labels = [],
+}) {
+  if (!repoAddress.startsWith("30617:")) {
+    throw new Error("Issue repo address must reference a kind:30617 repo.");
+  }
+  if (!/^[a-fA-F0-9]{64}$/.test(repoOwner)) {
+    throw new Error("Repo owner must be 64 hex characters.");
+  }
+  const subject = title.trim();
+  if (!subject) {
+    throw new Error("Issue title is required.");
+  }
+  if (subject.length > 256) {
+    throw new Error("Issue title must be 256 characters or fewer.");
+  }
+
+  const tags = [
+    ["a", repoAddress],
+    ["p", repoOwner.toLowerCase()],
+    ["subject", subject],
+  ];
+
+  for (const label of labels) {
+    const trimmed = label.trim();
+    if (trimmed) tags.push(["t", trimmed]);
+  }
+
+  return tags;
+}
+
+export function buildGitStatusTags({ issueId, repoAddress, repoOwner }) {
+  if (!/^[a-fA-F0-9]{64}$/.test(issueId)) {
+    throw new Error("Issue ID must be 64 hex characters.");
+  }
+  const tags = [["e", issueId, "", "root"]];
+  if (repoAddress) tags.push(["a", repoAddress]);
+  if (repoOwner && /^[a-fA-F0-9]{64}$/.test(repoOwner)) {
+    tags.push(["p", repoOwner.toLowerCase()]);
+  }
+  return tags;
+}
diff --git a/desktop/src/shared/api/projectGit.ts b/desktop/src/shared/api/projectGit.ts
new file mode 100644
index 000000000..0e8bc6444
--- /dev/null
+++ b/desktop/src/shared/api/projectGit.ts
@@ -0,0 +1,60 @@
+import type { ProjectRepoSnapshot } from "@/shared/api/types";
+import { invokeTauri } from "@/shared/api/tauri";
+
+type RawProjectRepoCommit = {
+  hash: string;
+  short_hash: string;
+  author_name: string;
+  author_email: string;
+  timestamp: number;
+  subject: string;
+};
+
+type RawProjectRepoFile = {
+  path: string;
+  kind: string;
+  size: number | null;
+  preview_content: string | null;
+};
+
+type RawProjectRepoSnapshot = {
+  latest_commit: RawProjectRepoCommit | null;
+  files: RawProjectRepoFile[];
+};
+
+function fromRawProjectRepoSnapshot(
+  snapshot: RawProjectRepoSnapshot,
+): ProjectRepoSnapshot {
+  return {
+    latestCommit: snapshot.latest_commit
+      ? {
+          hash: snapshot.latest_commit.hash,
+          shortHash: snapshot.latest_commit.short_hash,
+          authorName: snapshot.latest_commit.author_name,
+          authorEmail: snapshot.latest_commit.author_email,
+          timestamp: snapshot.latest_commit.timestamp,
+          subject: snapshot.latest_commit.subject,
+        }
+      : null,
+    files: snapshot.files.map((file) => ({
+      path: file.path,
+      kind: file.kind,
+      size: file.size,
+      previewContent: file.preview_content,
+    })),
+  };
+}
+
+export async function getProjectRepoSnapshot(input: {
+  cloneUrl: string;
+  defaultBranch?: string | null;
+}): Promise<ProjectRepoSnapshot> {
+  const snapshot = await invokeTauri<RawProjectRepoSnapshot>(
+    "get_project_repo_snapshot",
+    {
+      cloneUrl: input.cloneUrl,
+      defaultBranch: input.defaultBranch ?? null,
+    },
+  );
+  return fromRawProjectRepoSnapshot(snapshot);
+}
diff --git a/desktop/src/shared/api/types.ts b/desktop/src/shared/api/types.ts
index 1ca74eca3..30e7ef7d8 100644
--- a/desktop/src/shared/api/types.ts
+++ b/desktop/src/shared/api/types.ts
@@ -158,6 +158,27 @@ export type UserStatus = {
 
 export type UserStatusLookup = Record<string, UserStatus | null>;
 
+export type ProjectRepoCommit = {
+  hash: string;
+  shortHash: string;
+  authorName: string;
+  authorEmail: string;
+  timestamp: number;
+  subject: string;
+};
+
+export type ProjectRepoFile = {
+  path: string;
+  kind: string;
+  size: number | null;
+  previewContent: string | null;
+};
+
+export type ProjectRepoSnapshot = {
+  latestCommit: ProjectRepoCommit | null;
+  files: ProjectRepoFile[];
+};
+
 export type RelayEvent = {
   id: string;
   /** Local-only render identity for optimistic events that are later acknowledged. */
diff --git a/desktop/src/shared/constants/kinds.ts b/desktop/src/shared/constants/kinds.ts
index 3cb325ff3..be78e0630 100644
--- a/desktop/src/shared/constants/kinds.ts
+++ b/desktop/src/shared/constants/kinds.ts
@@ -35,6 +35,15 @@ export const KIND_MESH_CONNECT_REQUEST = 24621;
 export const KIND_MESH_CALL_ME_NOW = 24622;
 export const KIND_EVENT_REMINDER = 30300;
 export const KIND_REPO_ANNOUNCEMENT = 30617;
+export const KIND_REPO_STATE = 30618;
+export const KIND_GIT_PATCH = 1617;
+export const KIND_GIT_PULL_REQUEST = 1618;
+export const KIND_GIT_PR_UPDATE = 1619;
+export const KIND_GIT_ISSUE = 1621;
+export const KIND_GIT_STATUS_OPEN = 1630;
+export const KIND_GIT_STATUS_MERGED = 1631;
+export const KIND_GIT_STATUS_CLOSED = 1632;
+export const KIND_GIT_STATUS_DRAFT = 1633;
 // NIP-DV: relay-signed per-viewer DM visibility snapshot (d=viewer pubkey,
 // h-tags = currently-hidden DM channel ids).
 export const KIND_DM_VISIBILITY = 30622;