[U] Revise README for installation and demo info

Updated installation instructions and demo generation details in README.

README.md

@@ -1,3 +1,7 @@
+<p align="center">
+  <img src="./docs/refray.png" alt="refray logo" width="70%"/>
+</p>
+
 # refray
 
 A tool to keep your repos in sync across all git platforms, while being able to work from everywhere all at once. 
@@ -8,17 +12,46 @@ Created becasue github is so unusable and [unreliable](https://red-squares.cian.
 - **read-write mirrors**: Make changes from any provider, and the changes will sync to the others
 - **webhook support**: Sync right after push, reduce potential divergence window
 - **conflict handling**: Rebase or open pull requests when two platforms diverge
-- **tracks deletions**: Delete branches/repos across platforms when they are deleted from one platform
+- **tracks deletions**: Branches/repo deletions sync across platforms (with backup) 
 - **selective sync**: Sync subset of repos by regex white/black list, or by private/public visibility
+- **multithreaded**: Process multiple repos simultaneously!
 
 Supported platforms: GitHub, GitLab, Gitea, Forgejo
 
 > [!NOTE]
-> Meow
+> My cat made this codebase, meow
+
+![demo](./docs/demo.webp)
+
+<!--
+
+The demo was rendered from an asciinema cast with capped idle pauses, Sarasa Mono SC, a One Half Dark palette with lighter dark-gray ANSI slots, and a larger font:
+
+```sh
+agg --idle-time-limit 1 \
+  --theme '282C34,DCDFE4,5C6370,E06C75,98C379,E5C07B,61AFEF,C678DD,56B6C2,DCDFE4,7F848E,E06C75,98C379,E5C07B,61AFEF,C678DD,56B6C2,DCDFE4' \
+  --text-font-family 'Sarasa Mono SC' \
+  --font-size 24 \
+  --cols 160 \
+  --rows 42 \
+  ../out.cast \
+  demo.gif
+
+ffmpeg -i demo.gif \
+  -loop 0 \
+  -c:v libwebp_anim \
+  -lossless 1 \
+  -compression_level 6 \
+  -q:v 100 \
+  docs/demo.webp
+```
+
+--->
+
 
 ## Install
 
-### Option 1. Install from source
+### Option 1. Install with Cargo
 
 1. Install rust cargo if you don't have it: https://rustup.rs
 2. `cargo install refray`
@@ -173,6 +206,10 @@ To move installed hooks to a new public URL, use `webhook update`. It removes ho
 refray webhook update https://new.example.com/webhook
 ```
 
+## Issues and Pull Requests
+
+Issues and pull requests are not mirrored.
+
 ## Sync Semantics
 
 Each mirror group is treated as a set of equivalent namespaces. Repositories are matched by repository name across all endpoints.
@@ -203,7 +240,7 @@ Conflict resolution strategies are configured per mirror group:
 
 When a previously opened conflict pull request is merged, the next sync sees the merged branch as the winning tip, pushes it to the other endpoints, and closes stale `refray/conflicts/...` pull requests for that branch.
 
-Repository and branch deletion are propagated only when it is safe to infer intent. If a repository existed on every endpoint in the previous successful sync, then disappears from one endpoint while the remaining endpoints still have the previous synced refs, `refray` deletes it from the remaining endpoints instead of recreating it. If the repository was deleted everywhere, `refray` removes its saved sync state. If the repository was deleted on one endpoint but changed elsewhere, it is treated as a conflict and skipped.
+Repository and branch deletion are propagated only when it is safe to infer intent, and `refray` writes local backup refs and bundle files under the work-dir `backups/` directory before propagating those deletions. If a repository existed on every endpoint in the previous successful sync, then disappears from one endpoint while the remaining endpoints still have the previous synced refs, `refray` deletes it from the remaining endpoints instead of recreating it when `delete_missing = true`. If `delete_missing = false`, that missing repository is not treated as a deletion and normal missing-repository handling applies. If the repository was deleted everywhere, `refray` removes its saved sync state after creating a local backup from the mirror cache. If the repository was deleted on one endpoint but changed elsewhere, it is treated as a conflict and skipped.
 
 Branch deletion follows the same rule at branch scope: if a branch existed on every endpoint in the previous successful sync, then disappears from one endpoint while the remaining endpoints still have the previous tip, `refray` deletes it from the remaining endpoints instead of recreating it. If the branch was deleted on one endpoint but changed elsewhere, it is treated as a conflict and skipped.
 
@@ -240,7 +277,3 @@ REFRAY_E2E_ALLOW_DESTRUCTIVE=1 \
 ```
 
 By default cleanup only deletes repositories named `refray-e2e-*`. To start by deleting every owned repository visible to the configured accounts, set `REFRAY_E2E_CLEAR_ALL_REPOS=DELETE_ALL_OWNED_REPOS`. Provider skips (`REFRAY_E2E_SKIP_GITHUB`, `REFRAY_E2E_SKIP_GITLAB`, `REFRAY_E2E_SKIP_GITEA`, `REFRAY_E2E_SKIP_FORGEJO`) and `REFRAY_E2E_ALLOW_PARTIAL=1` are available for local debugging, but the full support check should run with all four providers.
-
-## Issues and Pull Requests
-
-Issues and pull requests are not mirrored.

src/config.rs

@@ -62,6 +62,8 @@ pub struct MirrorConfig {
     pub repo_blacklist: Option<String>,
     #[serde(default = "default_true")]
     pub create_missing: bool,
+    #[serde(default = "default_true")]
+    pub delete_missing: bool,
     #[serde(default)]
     pub visibility: Visibility,
     #[serde(default)]

src/git.rs

@@ -52,6 +52,13 @@ pub struct BranchUpdate {
     pub force: bool,
 }
 
+#[derive(Clone, Debug)]
+pub struct RefBackup {
+    pub refname: String,
+    pub sha: String,
+    pub description: String,
+}
+
 #[derive(Clone, Debug)]
 pub struct BranchRebaseDecision {
     pub branch: String,
@@ -420,6 +427,63 @@ impl GitMirror {
         Ok(())
     }
 
+    pub fn backup_refs(&self, backups: &[RefBackup]) -> Result<Vec<String>> {
+        let mut refs = Vec::new();
+        for backup in backups {
+            crate::logln!(
+                "  {} {}",
+                style("backup").cyan().bold(),
+                style(&backup.description).dim()
+            );
+            self.run(["update-ref", &backup.refname, &backup.sha])?;
+            refs.push(backup.refname.clone());
+        }
+        Ok(refs)
+    }
+
+    pub fn create_bundle(&self, path: &Path, refs: &[String]) -> Result<bool> {
+        if refs.is_empty() {
+            return Ok(false);
+        }
+        if self.dry_run {
+            crate::logln!(
+                "  {} git bundle create {} {}",
+                style("dry-run").yellow().bold(),
+                style(path.display()).dim(),
+                style(refs.join(" ")).dim()
+            );
+            return Ok(false);
+        }
+        if let Some(parent) = path.parent() {
+            fs::create_dir_all(parent)
+                .with_context(|| format!("failed to create {}", parent.display()))?;
+        }
+
+        let output = self
+            .command()
+            .arg("bundle")
+            .arg("create")
+            .arg(path)
+            .args(refs)
+            .output()
+            .with_context(|| "failed to run git bundle create")?;
+        if !output.status.success() {
+            let stdout = self
+                .redactor
+                .redact(&String::from_utf8_lossy(&output.stdout));
+            let stderr = self
+                .redactor
+                .redact(&String::from_utf8_lossy(&output.stderr));
+            return Err(GitCommandError::new("git bundle create", stdout, stderr).into());
+        }
+        crate::logln!(
+            "  {} {}",
+            style("backup bundle").cyan().bold(),
+            style(path.display()).dim()
+        );
+        Ok(true)
+    }
+
     fn push_branch_update(&self, remote: &RemoteSpec, update: &BranchUpdate) -> Result<()> {
         let refspec = if update.force {
             format!("+{}:refs/heads/{}", update.sha, update.branch)
@@ -752,6 +816,13 @@ pub fn is_disabled_repository_error(error: &anyhow::Error) -> bool {
         .any(|error| is_disabled_repository_stderr(error.stderr()))
 }
 
+pub fn is_missing_repository_error(error: &anyhow::Error) -> bool {
+    error
+        .chain()
+        .filter_map(|cause| cause.downcast_ref::<GitCommandError>())
+        .any(|error| is_missing_repository_stderr(error.stderr()))
+}
+
 fn missing_remotes(all_remote_names: &[String], source_remotes: &[String]) -> Vec<String> {
     all_remote_names
         .iter()
@@ -768,6 +839,14 @@ fn is_disabled_repository_stderr(stderr: &str) -> bool {
         || stderr.contains("dmca takedown")
 }
 
+fn is_missing_repository_stderr(stderr: &str) -> bool {
+    let stderr = stderr.to_ascii_lowercase();
+    (stderr.contains("repository") && stderr.contains("not found"))
+        || stderr.contains("project you were looking for could not be found")
+        || stderr.contains("does not appear to be a git repository")
+        || stderr.contains("the requested url returned error: 404")
+}
+
 impl Redactor {
     pub fn new(secrets: Vec<String>) -> Self {
         let secrets = secrets

src/interactive.rs

@@ -115,6 +115,9 @@ fn add_sync_group_styled(config: &mut Config, theme: &ColorfulTheme) -> Result<(
     let endpoints = prompt_sync_group_endpoints_styled(config, theme, &[])?;
     let sync_visibility = prompt_sync_visibility_styled(theme, None)?;
     let repo_filters = prompt_repo_filters_styled(theme, None)?;
+    print_deletion_backup_notice_styled();
+    let create_missing = prompt_create_missing_styled(theme, None)?;
+    let delete_missing = prompt_delete_missing_styled(theme, None)?;
     let conflict_resolution = prompt_conflict_resolution_styled(theme, None)?;
     config.upsert_mirror(MirrorConfig {
         name: next_mirror_name(config),
@@ -122,7 +125,8 @@ fn add_sync_group_styled(config: &mut Config, theme: &ColorfulTheme) -> Result<(
         sync_visibility,
         repo_whitelist: repo_filters.whitelist,
         repo_blacklist: repo_filters.blacklist,
-        create_missing: true,
+        create_missing,
+        delete_missing,
         visibility: Visibility::Private,
         conflict_resolution,
     });
@@ -447,6 +451,8 @@ fn edit_sync_group_styled(config: &mut Config, theme: &ColorfulTheme) -> Result<
     let existing_sync_visibility = config.mirrors[index].sync_visibility.clone();
     let existing_repo_whitelist = config.mirrors[index].repo_whitelist.clone();
     let existing_repo_blacklist = config.mirrors[index].repo_blacklist.clone();
+    let existing_create_missing = config.mirrors[index].create_missing;
+    let existing_delete_missing = config.mirrors[index].delete_missing;
     let existing_conflict_resolution = config.mirrors[index].conflict_resolution.clone();
     let endpoints = prompt_sync_group_endpoints_styled(config, theme, &existing)?;
     let sync_visibility = prompt_sync_visibility_styled(theme, Some(&existing_sync_visibility))?;
@@ -455,12 +461,17 @@ fn edit_sync_group_styled(config: &mut Config, theme: &ColorfulTheme) -> Result<
         blacklist: existing_repo_blacklist,
     };
     let repo_filters = prompt_repo_filters_styled(theme, Some(&existing_repo_filters))?;
+    print_deletion_backup_notice_styled();
+    let create_missing = prompt_create_missing_styled(theme, Some(existing_create_missing))?;
+    let delete_missing = prompt_delete_missing_styled(theme, Some(existing_delete_missing))?;
     let conflict_resolution =
         prompt_conflict_resolution_styled(theme, Some(&existing_conflict_resolution))?;
     config.mirrors[index].endpoints = endpoints;
     config.mirrors[index].sync_visibility = sync_visibility;
     config.mirrors[index].repo_whitelist = repo_filters.whitelist;
     config.mirrors[index].repo_blacklist = repo_filters.blacklist;
+    config.mirrors[index].create_missing = create_missing;
+    config.mirrors[index].delete_missing = delete_missing;
     config.mirrors[index].conflict_resolution = conflict_resolution;
     prompt_webhook_setup_styled(config, theme)?;
     println!(
@@ -817,6 +828,31 @@ fn prompt_repo_pattern_styled(
     Ok(parse_repo_pattern(&value))
 }
 
+fn print_deletion_backup_notice_styled() {
+    println!();
+    println!(
+        "{} {}",
+        style("Deletion backups").cyan().bold(),
+        style("refray keeps a local backup before propagating repository or branch deletes").dim()
+    );
+}
+
+fn prompt_create_missing_styled(theme: &ColorfulTheme, existing: Option<bool>) -> Result<bool> {
+    Confirm::with_theme(theme)
+        .with_prompt("Create repositories that are missing from an endpoint?")
+        .default(existing.unwrap_or(true))
+        .interact()
+        .map_err(Into::into)
+}
+
+fn prompt_delete_missing_styled(theme: &ColorfulTheme, existing: Option<bool>) -> Result<bool> {
+    Confirm::with_theme(theme)
+        .with_prompt("When a previously synced repository is deleted from one endpoint, delete it everywhere?")
+        .default(existing.unwrap_or(true))
+        .interact()
+        .map_err(Into::into)
+}
+
 fn validate_repo_pattern(value: &str) -> std::result::Result<(), String> {
     let Some(pattern) = parse_repo_pattern(value) else {
         return Ok(());
@@ -913,10 +949,11 @@ fn sync_group_summary(config: &Config, mirror: &MirrorConfig) -> String {
         .collect::<Vec<_>>()
         .join(" <-> ");
     format!(
-        "{} ({}, {}, {})",
+        "{} ({}, {}, {}, {})",
         endpoints,
         sync_visibility_label(&mirror.sync_visibility),
         repo_filter_label(mirror),
+        repo_lifecycle_label(mirror),
         conflict_resolution_label(&mirror.conflict_resolution)
     )
 }
@@ -938,6 +975,22 @@ fn repo_filter_label(mirror: &MirrorConfig) -> String {
     }
 }
 
+fn repo_lifecycle_label(mirror: &MirrorConfig) -> String {
+    format!(
+        "missing: {}, deletes: {}",
+        if mirror.create_missing {
+            "create"
+        } else {
+            "skip"
+        },
+        if mirror.delete_missing {
+            "propagate"
+        } else {
+            "keep"
+        }
+    )
+}
+
 fn conflict_resolution_label(strategy: &ConflictResolutionStrategy) -> &'static str {
     match strategy {
         ConflictResolutionStrategy::Fail => "conflicts: fail",

src/provider.rs

@@ -40,6 +40,12 @@ pub struct PullRequestInfo {
     pub url: Option<String>,
 }
 
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub enum WebhookInstallOutcome {
+    Created,
+    Existing,
+}
+
 pub fn list_mirror_repos(
     config: &Config,
     mirror: &MirrorConfig,
@@ -166,13 +172,26 @@ impl<'a> ProviderClient<'a> {
         )
     }
 
+    pub fn set_default_branch(
+        &self,
+        endpoint: &EndpointConfig,
+        repo_name: &str,
+        branch: &str,
+    ) -> Result<()> {
+        dispatch_provider!(self.site.provider,
+            github => self.github_set_default_branch(endpoint, repo_name, branch),
+            gitlab => self.gitlab_set_default_branch(endpoint, repo_name, branch),
+            gitea_like => self.gitea_set_default_branch(endpoint, repo_name, branch),
+        )
+    }
+
     pub fn install_webhook(
         &self,
         endpoint: &EndpointConfig,
         repo: &RemoteRepo,
         url: &str,
         secret: &str,
-    ) -> Result<()> {
+    ) -> Result<WebhookInstallOutcome> {
         dispatch_provider!(self.site.provider,
             github => self.github_install_webhook(endpoint, repo, url, secret),
             gitlab => self.gitlab_install_webhook(endpoint, repo, url, secret),
@@ -311,13 +330,24 @@ impl<'a> ProviderClient<'a> {
         self.delete(&url).map(|_| ())
     }
 
+    fn github_set_default_branch(
+        &self,
+        endpoint: &EndpointConfig,
+        repo_name: &str,
+        branch: &str,
+    ) -> Result<()> {
+        let url = self.repo_url(endpoint, repo_name, "GitHub")?;
+        self.patch_json::<serde_json::Value>(&url, &json!({ "default_branch": branch }))
+            .map(|_| ())
+    }
+
     fn github_install_webhook(
         &self,
         endpoint: &EndpointConfig,
         repo: &RemoteRepo,
         url: &str,
         secret: &str,
-    ) -> Result<()> {
+    ) -> Result<WebhookInstallOutcome> {
         let hooks_url = self.repo_hooks_url(endpoint, &repo.name, "GitHub")?;
         let body = json!({
             "name": "web",
@@ -435,7 +465,11 @@ impl<'a> ProviderClient<'a> {
                         projects.push(project);
                     }
                 }
-                Ok(projects.into_iter().map(Into::into).collect())
+                Ok(projects
+                    .into_iter()
+                    .filter(|project| !project.is_deletion_scheduled())
+                    .map(Into::into)
+                    .collect())
             }
             NamespaceKind::Org | NamespaceKind::Group => {
                 let encoded = urlencoding(&endpoint.namespace);
@@ -444,7 +478,12 @@ impl<'a> ProviderClient<'a> {
                     self.site.api_base(),
                     encoded
                 );
-                self.paged_remote_repos::<GitlabProject>(&url)
+                Ok(self
+                    .paged_get::<GitlabProject>(&url)?
+                    .into_iter()
+                    .filter(|project| !project.is_deletion_scheduled())
+                    .map(Into::into)
+                    .collect())
             }
         }
     }
@@ -496,6 +535,17 @@ impl<'a> ProviderClient<'a> {
         self.delete(&url).map(|_| ())
     }
 
+    fn gitlab_set_default_branch(
+        &self,
+        endpoint: &EndpointConfig,
+        repo_name: &str,
+        branch: &str,
+    ) -> Result<()> {
+        let url = self.gitlab_project_url(endpoint, repo_name);
+        self.put_json::<serde_json::Value>(&url, &json!({ "default_branch": branch }))
+            .map(|_| ())
+    }
+
     fn gitlab_group(&self, namespace: &str) -> Result<GitlabGroup> {
         let url = format!("{}/groups/{}", self.site.api_base(), urlencoding(namespace));
         self.get_json(&url)
@@ -526,7 +576,7 @@ impl<'a> ProviderClient<'a> {
         repo: &RemoteRepo,
         url: &str,
         secret: &str,
-    ) -> Result<()> {
+    ) -> Result<WebhookInstallOutcome> {
         let hooks_url = self.gitlab_hooks_url(endpoint, &repo.name);
         let body = json!({
             "url": url,
@@ -689,13 +739,24 @@ impl<'a> ProviderClient<'a> {
         self.delete(&url).map(|_| ())
     }
 
+    fn gitea_set_default_branch(
+        &self,
+        endpoint: &EndpointConfig,
+        repo_name: &str,
+        branch: &str,
+    ) -> Result<()> {
+        let url = self.repo_url(endpoint, repo_name, "Gitea/Forgejo")?;
+        self.patch_json::<serde_json::Value>(&url, &json!({ "default_branch": branch }))
+            .map(|_| ())
+    }
+
     fn gitea_install_webhook(
         &self,
         endpoint: &EndpointConfig,
         repo: &RemoteRepo,
         url: &str,
         secret: &str,
-    ) -> Result<()> {
+    ) -> Result<WebhookInstallOutcome> {
         let hooks_url = self.repo_hooks_url(endpoint, &repo.name, "Gitea/Forgejo")?;
         let body = json!({
             "type": "gitea",
@@ -875,10 +936,10 @@ impl<'a> ProviderClient<'a> {
         target_url: &str,
         body: &serde_json::Value,
         put_on_update: bool,
-    ) -> Result<()> {
+    ) -> Result<WebhookInstallOutcome> {
         let Some(hook) = self.find_existing_hook(hooks_url, target_url)? else {
             self.post_json::<serde_json::Value>(hooks_url, body)?;
-            return Ok(());
+            return Ok(WebhookInstallOutcome::Created);
         };
 
         let update_url = format!("{hooks_url}/{}", hook.id);
@@ -887,7 +948,7 @@ impl<'a> ProviderClient<'a> {
         } else {
             self.patch_json::<serde_json::Value>(&update_url, body)?;
         }
-        Ok(())
+        Ok(WebhookInstallOutcome::Existing)
     }
 
     fn delete_matching_hook(&self, hooks_url: &str, target_url: &str) -> Result<bool> {
@@ -1157,6 +1218,10 @@ struct GitlabProject {
     http_url_to_repo: String,
     visibility: String,
     description: Option<String>,
+    marked_for_deletion_at: Option<String>,
+    marked_for_deletion_on: Option<String>,
+    #[serde(default)]
+    pending_delete: bool,
 }
 
 impl GitlabProject {
@@ -1184,6 +1249,37 @@ impl GitlabProject {
                 .eq_ignore_ascii_case(other.project_path()),
         }
     }
+
+    fn is_deletion_scheduled(&self) -> bool {
+        self.pending_delete
+            || self
+                .marked_for_deletion_at
+                .as_deref()
+                .is_some_and(|value| !value.is_empty())
+            || self
+                .marked_for_deletion_on
+                .as_deref()
+                .is_some_and(|value| !value.is_empty())
+            || is_gitlab_deletion_scheduled_path(&self.name)
+            || self
+                .path
+                .as_deref()
+                .is_some_and(is_gitlab_deletion_scheduled_path)
+            || self
+                .path_with_namespace
+                .as_deref()
+                .and_then(|path| path.rsplit('/').next())
+                .is_some_and(is_gitlab_deletion_scheduled_path)
+    }
+}
+
+fn is_gitlab_deletion_scheduled_path(path: &str) -> bool {
+    let Some((name, project_id)) = path.rsplit_once("-deletion_scheduled-") else {
+        return false;
+    };
+    !name.is_empty()
+        && !project_id.is_empty()
+        && project_id.bytes().all(|byte| byte.is_ascii_digit())
 }
 
 #[derive(Deserialize)]

src/sync.rs

@@ -3,6 +3,7 @@ use std::fs;
 use std::path::{Path, PathBuf};
 use std::sync::{Arc, Mutex, mpsc};
 use std::thread;
+use std::time::{SystemTime, UNIX_EPOCH};
 
 use anyhow::{Context, Result, bail};
 use console::style;
@@ -10,11 +11,11 @@ use regex::Regex;
 
 use crate::config::{
     Config, ConflictResolutionStrategy, DEFAULT_JOBS, EndpointConfig, MirrorConfig, NamespaceKind,
-    RepoNameFilter, SyncVisibility, Visibility, default_work_dir, validate_config,
+    ProviderKind, RepoNameFilter, SyncVisibility, Visibility, default_work_dir, validate_config,
 };
 use crate::git::{
-    BranchConflict, BranchDeletion, BranchUpdate, GitMirror, Redactor, RemoteSpec,
-    is_disabled_repository_error, ls_remote_refs, safe_remote_name,
+    BranchConflict, BranchDeletion, BranchUpdate, GitMirror, Redactor, RefBackup, RemoteSpec,
+    is_disabled_repository_error, is_missing_repository_error, ls_remote_refs, safe_remote_name,
 };
 use crate::logging;
 use crate::provider::{
@@ -37,6 +38,7 @@ use self::state::{
 };
 
 const CONFLICT_BRANCH_ROOT: &str = "refray/conflicts/";
+const DEFAULT_BRANCH: &str = "main";
 
 #[derive(Clone, Debug)]
 pub struct SyncOptions {
@@ -139,6 +141,83 @@ pub fn sync_all(config: &Config, options: SyncOptions) -> Result<()> {
     Ok(())
 }
 
+pub fn sync_webhook_repo(
+    config: &Config,
+    group: &str,
+    repo_name: &str,
+    work_dir: Option<PathBuf>,
+    jobs: usize,
+) -> Result<()> {
+    validate_config(config)?;
+    if jobs == 0 {
+        bail!("jobs must be at least 1");
+    }
+    let work_dir = work_dir.unwrap_or_else(default_work_dir);
+    fs::create_dir_all(&work_dir)
+        .with_context(|| format!("failed to create {}", work_dir.display()))?;
+    let mirror = config
+        .mirrors
+        .iter()
+        .find(|mirror| mirror.name == group)
+        .with_context(|| format!("no mirror group matched '{group}'"))?;
+    let repo_filter = mirror.repo_filter()?;
+    if !repo_filter.matches(repo_name) {
+        crate::logln!(
+            "  {} {} does not match configured repository filters",
+            style("skip").yellow().bold(),
+            style(repo_name).cyan()
+        );
+        return Ok(());
+    }
+
+    let tokens = config
+        .sites
+        .iter()
+        .map(|site| site.token())
+        .collect::<Result<Vec<_>>>()?;
+    let redactor = Redactor::new(tokens);
+    let mut ref_state = load_ref_state(&work_dir)?;
+    crate::logln!();
+    crate::logln!(
+        "{} {}",
+        style("Mirror group").cyan().bold(),
+        style(&mirror.name).bold()
+    );
+    let mut repos = targeted_endpoint_repos(config, mirror, repo_name)?;
+    let context = RepoSyncContext {
+        config,
+        mirror,
+        work_dir: &work_dir,
+        redactor,
+        dry_run: false,
+        jobs,
+    };
+    let outcome = sync_assumed_repo(
+        &context,
+        repo_name,
+        &mut repos,
+        mirror.create_missing,
+        &ref_state,
+    )?;
+    if !outcome.created_repos.is_empty() {
+        webhook::ensure_configured_webhooks(
+            config,
+            mirror,
+            &outcome.created_repos,
+            &work_dir,
+            jobs,
+        )?;
+    }
+    if let Some(update) = outcome.state_update {
+        match update {
+            RepoStateUpdate::Set(refs) => ref_state.set_repo(&mirror.name, repo_name, refs),
+            RepoStateUpdate::Remove => ref_state.remove_repo(&mirror.name, repo_name),
+        }
+        save_ref_state(&work_dir, &ref_state)?;
+    }
+    Ok(())
+}
+
 struct GroupSyncContext<'a> {
     config: &'a Config,
     options: &'a SyncOptions,
@@ -412,7 +491,7 @@ fn ensure_missing_repos(
     repo_name: &str,
     existing: &mut Vec<EndpointRepo>,
     create_missing: bool,
-) -> Result<()> {
+) -> Result<Vec<EndpointRepo>> {
     let present = existing
         .iter()
         .map(|repo| repo.endpoint.clone())
@@ -446,13 +525,19 @@ fn ensure_missing_repos(
                 style(format!("on {}", endpoint.label())).dim()
             );
         }
-        return Ok(());
+        return Ok(Vec::new());
     }
 
     let description = template.and_then(|repo| repo.description);
     let expected_private = matches!(create_visibility, Visibility::Private);
     let create_jobs = missing.into_iter().enumerate().collect::<Vec<_>>();
-    let mut created = crate::parallel::map(create_jobs, context.jobs, |(index, endpoint)| {
+    let created = crate::parallel::map(create_jobs, context.jobs, |(index, endpoint)| {
+        let site = context.config.site(&endpoint.site).unwrap();
+        if site.provider == ProviderKind::Gitlab && !is_supported_gitlab_project_path(repo_name) {
+            log_invalid_gitlab_project_name_skip(repo_name, &endpoint);
+            return Ok(None);
+        }
+
         crate::logln!(
             "  {} {} {}",
             style("create").green().bold(),
@@ -460,16 +545,27 @@ fn ensure_missing_repos(
             style(format!("on {}", endpoint.label())).dim()
         );
 
-        let site = context.config.site(&endpoint.site).unwrap();
         let client = ProviderClient::new(site)?;
-        let created = client
-            .create_repo(
-                &endpoint,
-                repo_name,
-                &create_visibility,
-                description.as_deref(),
-            )
-            .with_context(|| format!("failed to create {} on {}", repo_name, endpoint.label()))?;
+        let created = match client.create_repo(
+            &endpoint,
+            repo_name,
+            &create_visibility,
+            description.as_deref(),
+        ) {
+            Ok(created) => created,
+            Err(error)
+                if site.provider == ProviderKind::Gitlab
+                    && is_gitlab_invalid_project_name_error(&error) =>
+            {
+                log_invalid_gitlab_project_name_skip(repo_name, &endpoint);
+                return Ok(None);
+            }
+            Err(error) => {
+                return Err(error).with_context(|| {
+                    format!("failed to create {} on {}", repo_name, endpoint.label())
+                });
+            }
+        };
         if created.private != expected_private {
             crate::logln!(
                 "  {} created {} on {}, but provider reported a different visibility than requested",
@@ -478,18 +574,23 @@ fn ensure_missing_repos(
                 style(endpoint.label()).dim()
             );
         }
-        Ok((
+        Ok(Some((
             index,
             EndpointRepo {
                 endpoint,
                 repo: created,
             },
-        ))
+        )))
     })?;
+    let mut created = created.into_iter().flatten().collect::<Vec<_>>();
     created.sort_by_key(|(index, _)| *index);
-    existing.extend(created.into_iter().map(|(_, repo)| repo));
+    let created = created
+        .into_iter()
+        .map(|(_, repo)| repo)
+        .collect::<Vec<_>>();
+    existing.extend(created.clone());
 
-    Ok(())
+    Ok(created)
 }
 
 fn visibility_for_created_repo(mirror: &MirrorConfig, template: Option<&RemoteRepo>) -> Visibility {
@@ -504,6 +605,50 @@ fn visibility_for_created_repo(mirror: &MirrorConfig, template: Option<&RemoteRe
         .unwrap_or_else(|| mirror.visibility.clone())
 }
 
+fn is_supported_gitlab_project_path(name: &str) -> bool {
+    if name.is_empty()
+        || matches!(name.chars().next(), Some('-' | '_' | '.'))
+        || matches!(name.chars().last(), Some('-' | '_' | '.'))
+    {
+        return false;
+    }
+
+    let lower = name.to_ascii_lowercase();
+    if lower.ends_with(".git") || lower.ends_with(".atom") {
+        return false;
+    }
+
+    name.chars()
+        .all(|ch| ch.is_ascii_alphanumeric() || matches!(ch, '_' | '-' | '.'))
+}
+
+fn log_invalid_gitlab_project_name_skip(repo_name: &str, endpoint: &EndpointConfig) {
+    crate::logln!(
+        "  {} {} {}",
+        style("skip").yellow().bold(),
+        style(repo_name).cyan(),
+        style(format!(
+            "on {}: invalid GitLab project name/path",
+            endpoint.label()
+        ))
+        .dim()
+    );
+}
+
+fn is_gitlab_invalid_project_name_error(error: &anyhow::Error) -> bool {
+    let text = error
+        .chain()
+        .map(ToString::to_string)
+        .collect::<Vec<_>>()
+        .join("\n")
+        .to_ascii_lowercase();
+    text.contains("400 bad request")
+        && (text.contains("project_namespace.path")
+            || text.contains("can only include non-accented letters")
+            || text.contains("must not start with")
+            || text.contains("must start with a letter"))
+}
+
 struct RepoSyncContext<'a> {
     config: &'a Config,
     mirror: &'a MirrorConfig,
@@ -516,6 +661,7 @@ struct RepoSyncContext<'a> {
 #[derive(Default)]
 struct RepoSyncOutcome {
     state_update: Option<RepoStateUpdate>,
+    created_repos: Vec<EndpointRepo>,
 }
 
 enum RepoStateUpdate {
@@ -523,6 +669,53 @@ enum RepoStateUpdate {
     Remove,
 }
 
+fn mirror_repo_path(context: &RepoSyncContext<'_>, repo_name: &str) -> PathBuf {
+    context
+        .work_dir
+        .join(safe_remote_name(&context.mirror.name))
+        .join(format!("{}.git", safe_remote_name(repo_name)))
+}
+
+fn targeted_endpoint_repos(
+    config: &Config,
+    mirror: &MirrorConfig,
+    repo_name: &str,
+) -> Result<Vec<EndpointRepo>> {
+    mirror
+        .endpoints
+        .iter()
+        .map(|endpoint| {
+            let site = config.site(&endpoint.site).unwrap();
+            Ok(EndpointRepo {
+                endpoint: endpoint.clone(),
+                repo: RemoteRepo {
+                    name: repo_name.to_string(),
+                    clone_url: endpoint_clone_url(site, endpoint, repo_name)?,
+                    private: matches!(mirror.visibility, Visibility::Private),
+                    description: None,
+                },
+            })
+        })
+        .collect()
+}
+
+fn endpoint_clone_url(
+    site: &crate::config::SiteConfig,
+    endpoint: &EndpointConfig,
+    repo_name: &str,
+) -> Result<String> {
+    let mut url = url::Url::parse(&site.base_url)
+        .with_context(|| format!("invalid base URL for site '{}'", site.name))?;
+    let base_path = url.path().trim_end_matches('/');
+    let repo_path = format!("{}/{}.git", endpoint.namespace.trim_matches('/'), repo_name);
+    if base_path.is_empty() {
+        url.set_path(&repo_path);
+    } else {
+        url.set_path(&format!("{base_path}/{repo_path}"));
+    }
+    Ok(url.to_string())
+}
+
 fn sync_repo(
     context: &RepoSyncContext<'_>,
     repo_name: &str,
@@ -573,14 +766,18 @@ fn sync_repo(
         return Ok(RepoSyncOutcome::default());
     }
 
-    let path = context
-        .work_dir
-        .join(safe_remote_name(&context.mirror.name))
-        .join(format!("{}.git", safe_remote_name(repo_name)));
+    let path = mirror_repo_path(context, repo_name);
     let mirror_repo = GitMirror::open(path, context.redactor.clone(), context.dry_run)?;
 
     mirror_repo.configure_remotes(&initial_remotes)?;
     let cached_ref_state = cached_ref_state(&mirror_repo, &initial_remotes)?;
+    backup_branches_deleted_everywhere(
+        context,
+        &mirror_repo,
+        repo_name,
+        detailed_repo_ref_state(previous_repo_refs).or(cached_ref_state.as_ref()),
+        &initial_ref_state,
+    )?;
     for remote in &initial_remotes {
         if let Err(error) = mirror_repo.fetch_remote(remote) {
             if is_disabled_repository_error(&error) {
@@ -596,7 +793,7 @@ fn sync_repo(
         }
     }
 
-    ensure_missing_repos(context, repo_name, repos, create_missing)?;
+    let created_repos = ensure_missing_repos(context, repo_name, repos, create_missing)?;
 
     if repos.len() < 2 {
         crate::logln!(
@@ -635,6 +832,7 @@ fn sync_repo(
     let result = push_repo_refs(
         context,
         &mirror_repo,
+        repo_name,
         &remotes,
         repos,
         detailed_repo_ref_state(previous_repo_refs).or(cached_ref_state.as_ref()),
@@ -645,15 +843,193 @@ fn sync_repo(
             let Some(refs) = check_remote_refs(context, repo_name, &remotes)? else {
                 return Ok(RepoSyncOutcome::default());
             };
+            set_default_branch_for_created_repos(context, repo_name, &created_repos, &refs)?;
             refs
         } else {
             initial_ref_state
         };
         return Ok(RepoSyncOutcome {
             state_update: Some(RepoStateUpdate::Set(refs)),
+            created_repos,
         });
     }
-    Ok(RepoSyncOutcome::default())
+    Ok(RepoSyncOutcome {
+        created_repos,
+        ..RepoSyncOutcome::default()
+    })
+}
+
+fn set_default_branch_for_created_repos(
+    context: &RepoSyncContext<'_>,
+    repo_name: &str,
+    created_repos: &[EndpointRepo],
+    refs: &BTreeMap<String, RemoteRefState>,
+) -> Result<()> {
+    if created_repos.is_empty() {
+        return Ok(());
+    }
+
+    let targets = created_repos
+        .iter()
+        .filter(|repo| {
+            refs.get(&remote_name_for_endpoint_repo(repo))
+                .is_some_and(|refs| refs.branches.contains_key(DEFAULT_BRANCH))
+        })
+        .cloned()
+        .collect::<Vec<_>>();
+
+    crate::parallel::map(targets, context.jobs, |repo| {
+        crate::logln!(
+            "  {} branch {} {}",
+            style("default").green().bold(),
+            style(DEFAULT_BRANCH).cyan(),
+            style(format!("on {}", repo.endpoint.label())).dim()
+        );
+        let site = context.config.site(&repo.endpoint.site).unwrap();
+        ProviderClient::new(site)?
+            .set_default_branch(&repo.endpoint, repo_name, DEFAULT_BRANCH)
+            .with_context(|| {
+                format!(
+                    "failed to set default branch for {} on {}",
+                    repo_name,
+                    repo.endpoint.label()
+                )
+            })?;
+        Ok(())
+    })?;
+
+    Ok(())
+}
+
+fn sync_assumed_repo(
+    context: &RepoSyncContext<'_>,
+    repo_name: &str,
+    repos: &mut [EndpointRepo],
+    create_missing: bool,
+    ref_state: &RefState,
+) -> Result<RepoSyncOutcome> {
+    crate::logln!();
+    crate::logln!(
+        "{} {}",
+        style("Repo").magenta().bold(),
+        style(repo_name).bold()
+    );
+    let previous_repo_refs = ref_state.repo(&context.mirror.name, repo_name);
+    let all_remotes = remote_specs(context, repos)?;
+    let Some(initial_ref_check) = check_assumed_remote_refs(context, repo_name, &all_remotes)?
+    else {
+        return Ok(RepoSyncOutcome::default());
+    };
+    if initial_ref_check.refs.is_empty() {
+        crate::logln!(
+            "  {} {}",
+            style("skip").yellow().bold(),
+            style("repository not found on any endpoint").dim()
+        );
+        return Ok(RepoSyncOutcome::default());
+    }
+
+    let existing_remote_names = initial_ref_check
+        .refs
+        .keys()
+        .cloned()
+        .collect::<BTreeSet<_>>();
+    let mut existing_repos = repos
+        .iter()
+        .filter(|repo| existing_remote_names.contains(&remote_name_for_endpoint_repo(repo)))
+        .cloned()
+        .collect::<Vec<_>>();
+    let existing_remotes = all_remotes
+        .iter()
+        .filter(|remote| existing_remote_names.contains(&remote.name))
+        .cloned()
+        .collect::<Vec<_>>();
+
+    let path = mirror_repo_path(context, repo_name);
+    let mirror_repo = GitMirror::open(path, context.redactor.clone(), context.dry_run)?;
+    mirror_repo.configure_remotes(&all_remotes)?;
+    let cached_ref_state = cached_ref_state(&mirror_repo, &existing_remotes)?;
+    backup_branches_deleted_everywhere(
+        context,
+        &mirror_repo,
+        repo_name,
+        detailed_repo_ref_state(previous_repo_refs).or(cached_ref_state.as_ref()),
+        &initial_ref_check.refs,
+    )?;
+
+    for remote in &existing_remotes {
+        if let Err(error) = mirror_repo.fetch_remote(remote) {
+            if is_disabled_repository_error(&error) {
+                crate::logln!(
+                    "  {} {} {}",
+                    style("skip").yellow().bold(),
+                    style(repo_name).cyan(),
+                    style(format!("provider blocked access on {}", remote.display)).dim()
+                );
+                return Ok(RepoSyncOutcome::default());
+            }
+            if is_missing_repository_error(&error) {
+                crate::logln!(
+                    "  {} {} {}",
+                    style("missing").yellow().bold(),
+                    style(repo_name).cyan(),
+                    style(format!("on {}", remote.display)).dim()
+                );
+                existing_repos.retain(|repo| remote_name_for_endpoint_repo(repo) != remote.name);
+                continue;
+            }
+            return Err(error).with_context(|| format!("failed to fetch {}", remote.display));
+        }
+    }
+
+    let created_repos =
+        ensure_missing_repos(context, repo_name, &mut existing_repos, create_missing)?;
+    if existing_repos.len() < 2 {
+        crate::logln!(
+            "  {} {} {}",
+            style("skip").yellow().bold(),
+            style(repo_name).cyan(),
+            style("fewer than two endpoints have this repository").dim()
+        );
+        return Ok(RepoSyncOutcome {
+            created_repos,
+            ..RepoSyncOutcome::default()
+        });
+    }
+
+    let remotes = remote_specs(context, &existing_repos)?;
+    mirror_repo.configure_remotes(&remotes)?;
+    let result = push_repo_refs(
+        context,
+        &mirror_repo,
+        repo_name,
+        &remotes,
+        &existing_repos,
+        detailed_repo_ref_state(previous_repo_refs).or(cached_ref_state.as_ref()),
+        &initial_ref_check.refs,
+    )?;
+    if !context.dry_run && !result.had_conflicts {
+        let refs = if result.pushed {
+            let Some(refs) = check_remote_refs(context, repo_name, &remotes)? else {
+                return Ok(RepoSyncOutcome {
+                    created_repos,
+                    ..RepoSyncOutcome::default()
+                });
+            };
+            set_default_branch_for_created_repos(context, repo_name, &created_repos, &refs)?;
+            refs
+        } else {
+            initial_ref_check.refs
+        };
+        return Ok(RepoSyncOutcome {
+            state_update: Some(RepoStateUpdate::Set(refs)),
+            created_repos,
+        });
+    }
+    Ok(RepoSyncOutcome {
+        created_repos,
+        ..RepoSyncOutcome::default()
+    })
 }
 
 fn handle_repo_deletion(
@@ -682,8 +1058,10 @@ fn handle_repo_deletion(
                 style(repo_name).cyan(),
                 deleted_remotes.join("+")
             );
+            backup_deleted_repo(context, repo_name, repos, previous_refs, current_refs)?;
             Ok(Some(RepoSyncOutcome {
                 state_update: (!context.dry_run).then_some(RepoStateUpdate::Remove),
+                ..RepoSyncOutcome::default()
             }))
         }
         RepoDeletionDecision::Propagate {
@@ -697,9 +1075,11 @@ fn handle_repo_deletion(
                 deleted_remotes.join("+"),
                 target_remotes.join("+")
             );
+            backup_deleted_repo(context, repo_name, repos, previous_refs, current_refs)?;
             delete_repos(context, repo_name, repos, &target_remotes)?;
             Ok(Some(RepoSyncOutcome {
                 state_update: (!context.dry_run).then_some(RepoStateUpdate::Remove),
+                ..RepoSyncOutcome::default()
             }))
         }
         RepoDeletionDecision::Conflict {
@@ -720,6 +1100,65 @@ fn handle_repo_deletion(
     }
 }
 
+fn backup_deleted_repo(
+    context: &RepoSyncContext<'_>,
+    repo_name: &str,
+    repos: &[EndpointRepo],
+    previous_refs: Option<&BTreeMap<String, RemoteRefState>>,
+    current_refs: &BTreeMap<String, RemoteRefState>,
+) -> Result<()> {
+    if context.dry_run {
+        crate::logln!(
+            "  {} {} {}",
+            style("dry-run").yellow().bold(),
+            style("would create local backup for deleted repo").dim(),
+            style(repo_name).cyan()
+        );
+        return Ok(());
+    }
+
+    let path = mirror_repo_path(context, repo_name);
+    if repos.is_empty() && !path.exists() {
+        bail!(
+            "cannot back up deleted repo {} because local mirror cache {} is missing",
+            repo_name,
+            path.display()
+        );
+    }
+
+    let mirror_repo = GitMirror::open(path, context.redactor.clone(), false)?;
+    if !repos.is_empty() {
+        let remotes = remote_specs(context, repos)?;
+        mirror_repo.configure_remotes(&remotes)?;
+        for remote in &remotes {
+            mirror_repo.fetch_remote(remote).with_context(|| {
+                format!("failed to fetch {} for deletion backup", remote.display)
+            })?;
+        }
+    }
+
+    let stamp = backup_stamp()?;
+    let refs_to_backup = if current_refs.is_empty() {
+        previous_refs.unwrap_or(current_refs)
+    } else {
+        current_refs
+    };
+    let backups = repo_ref_backups(repo_name, refs_to_backup, &stamp);
+    if backups.is_empty() {
+        crate::logln!(
+            "  {} {} has no refs to bundle before deletion",
+            style("backup").yellow().bold(),
+            style(repo_name).cyan()
+        );
+        return Ok(());
+    }
+
+    let refs = mirror_repo.backup_refs(&backups)?;
+    let bundle_path = backup_dir(context, repo_name).join(format!("repo-{stamp}.bundle"));
+    mirror_repo.create_bundle(&bundle_path, &refs)?;
+    Ok(())
+}
+
 fn delete_repos(
     context: &RepoSyncContext<'_>,
     repo_name: &str,
@@ -846,6 +1285,69 @@ fn check_remote_refs(
     Ok(Some(refs))
 }
 
+struct AssumedRemoteRefState {
+    refs: BTreeMap<String, RemoteRefState>,
+}
+
+fn check_assumed_remote_refs(
+    context: &RepoSyncContext<'_>,
+    repo_name: &str,
+    remotes: &[RemoteSpec],
+) -> Result<Option<AssumedRemoteRefState>> {
+    enum RemoteRefCheck {
+        Found(String, RemoteRefState),
+        Missing(String),
+        Blocked,
+    }
+
+    let ref_jobs = remotes.to_vec();
+    let results = crate::parallel::map(ref_jobs, context.jobs, |remote| {
+        crate::logln!(
+            "  {} {}",
+            style("probe refs").cyan().bold(),
+            style(&remote.display).dim()
+        );
+        match ls_remote_refs(&remote, &context.redactor) {
+            Ok(snapshot) => Ok(RemoteRefCheck::Found(remote.name, snapshot.into())),
+            Err(error) if is_missing_repository_error(&error) => {
+                crate::logln!(
+                    "  {} {} {}",
+                    style("missing").yellow().bold(),
+                    style(repo_name).cyan(),
+                    style(format!("on {}", remote.display)).dim()
+                );
+                Ok(RemoteRefCheck::Missing(remote.name))
+            }
+            Err(error) if is_disabled_repository_error(&error) => {
+                crate::logln!(
+                    "  {} {} {}",
+                    style("skip").yellow().bold(),
+                    style(repo_name).cyan(),
+                    style(format!("provider blocked access on {}", remote.display)).dim()
+                );
+                Ok(RemoteRefCheck::Blocked)
+            }
+            Err(error) => {
+                Err(error).with_context(|| format!("failed to check refs for {}", remote.display))
+            }
+        }
+    })?;
+
+    let mut refs = BTreeMap::new();
+    for result in results {
+        match result {
+            RemoteRefCheck::Found(remote, refs_for_remote) => {
+                refs.insert(remote, refs_for_remote);
+            }
+            RemoteRefCheck::Missing(remote) => {
+                let _ = remote;
+            }
+            RemoteRefCheck::Blocked => return Ok(None),
+        }
+    }
+    Ok(Some(AssumedRemoteRefState { refs }))
+}
+
 fn remote_specs(context: &RepoSyncContext<'_>, repos: &[EndpointRepo]) -> Result<Vec<RemoteSpec>> {
     let endpoint_map = context
         .mirror
@@ -874,6 +1376,7 @@ fn remote_specs(context: &RepoSyncContext<'_>, repos: &[EndpointRepo]) -> Result
 fn push_repo_refs(
     context: &RepoSyncContext<'_>,
     mirror_repo: &GitMirror,
+    repo_name: &str,
     remotes: &[RemoteSpec],
     repos: &[EndpointRepo],
     previous_refs: Option<&BTreeMap<String, RemoteRefState>>,
@@ -972,6 +1475,13 @@ fn push_repo_refs(
     {
         if !branch_deletions.is_empty() {
             print_branch_deletions(&branch_deletions);
+            backup_deleted_branches(
+                context,
+                mirror_repo,
+                repo_name,
+                &branch_deletions,
+                current_refs,
+            )?;
             mirror_repo.delete_branches(remotes, &branch_deletions)?;
         }
         if !cleanup_branches.is_empty() {
@@ -994,6 +1504,13 @@ fn push_repo_refs(
     }
     if !branch_deletions.is_empty() {
         print_branch_deletions(&branch_deletions);
+        backup_deleted_branches(
+            context,
+            mirror_repo,
+            repo_name,
+            &branch_deletions,
+            current_refs,
+        )?;
         mirror_repo.delete_branches(remotes, &branch_deletions)?;
     }
     if !branches_to_push.is_empty() {
@@ -1031,6 +1548,64 @@ fn push_repo_refs(
     })
 }
 
+fn backup_deleted_branches(
+    context: &RepoSyncContext<'_>,
+    mirror_repo: &GitMirror,
+    repo_name: &str,
+    deletions: &[BranchDeletion],
+    current_refs: &BTreeMap<String, RemoteRefState>,
+) -> Result<()> {
+    if context.dry_run {
+        crate::logln!(
+            "  {} {} deleted branch backup{}",
+            style("dry-run").yellow().bold(),
+            style("would create").dim(),
+            if deletions.len() == 1 { "" } else { "s" }
+        );
+        return Ok(());
+    }
+
+    let stamp = backup_stamp()?;
+    let backups = branch_ref_backups(deletions, current_refs, &stamp);
+    if backups.is_empty() {
+        bail!("cannot back up branch deletion because no target branch refs were available");
+    }
+    let refs = mirror_repo.backup_refs(&backups)?;
+    let bundle_path = backup_dir(context, repo_name).join(format!("branches-{stamp}.bundle"));
+    mirror_repo.create_bundle(&bundle_path, &refs)?;
+    Ok(())
+}
+
+fn backup_branches_deleted_everywhere(
+    context: &RepoSyncContext<'_>,
+    mirror_repo: &GitMirror,
+    repo_name: &str,
+    previous_refs: Option<&BTreeMap<String, RemoteRefState>>,
+    current_refs: &BTreeMap<String, RemoteRefState>,
+) -> Result<()> {
+    let Some(previous_refs) = previous_refs else {
+        return Ok(());
+    };
+    let stamp = backup_stamp()?;
+    let backups = branches_deleted_everywhere_backups(previous_refs, current_refs, &stamp);
+    if backups.is_empty() {
+        return Ok(());
+    }
+    if context.dry_run {
+        crate::logln!(
+            "  {} {} branch backup{} for refs deleted everywhere",
+            style("dry-run").yellow().bold(),
+            style("would create").dim(),
+            if backups.len() == 1 { "" } else { "s" }
+        );
+        return Ok(());
+    }
+    let refs = mirror_repo.backup_refs(&backups)?;
+    let bundle_path = backup_dir(context, repo_name).join(format!("branches-{stamp}.bundle"));
+    mirror_repo.create_bundle(&bundle_path, &refs)?;
+    Ok(())
+}
+
 enum BranchConflictResolution {
     Rebased(Vec<BranchUpdate>),
     PullRequest(BranchConflict),
@@ -1342,6 +1917,140 @@ fn conflict_pr_base_branch(branch: &str) -> Option<String> {
     decode_hex_component(encoded)
 }
 
+fn backup_dir(context: &RepoSyncContext<'_>, repo_name: &str) -> PathBuf {
+    context
+        .work_dir
+        .join("backups")
+        .join(safe_remote_name(&context.mirror.name))
+        .join(safe_remote_name(repo_name))
+}
+
+fn backup_stamp() -> Result<String> {
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .with_context(|| "system clock is before UNIX_EPOCH")?;
+    Ok(format!("{}-{:09}", now.as_secs(), now.subsec_nanos()))
+}
+
+fn branch_ref_backups(
+    deletions: &[BranchDeletion],
+    current_refs: &BTreeMap<String, RemoteRefState>,
+    stamp: &str,
+) -> Vec<RefBackup> {
+    let mut backups = Vec::new();
+    let mut seen = BTreeSet::new();
+    for deletion in deletions {
+        for remote in &deletion.target_remotes {
+            let Some(sha) = current_refs
+                .get(remote)
+                .and_then(|refs| refs.branches.get(&deletion.branch))
+            else {
+                continue;
+            };
+            if !seen.insert((deletion.branch.clone(), sha.clone())) {
+                continue;
+            }
+            backups.push(RefBackup {
+                refname: format!(
+                    "refs/refray-backups/branches/{}/{}/{}",
+                    hex_component(&deletion.branch),
+                    stamp,
+                    hex_component(remote)
+                ),
+                sha: sha.clone(),
+                description: format!(
+                    "branch {} from {} before propagated deletion",
+                    deletion.branch, remote
+                ),
+            });
+        }
+    }
+    backups
+}
+
+fn branches_deleted_everywhere_backups(
+    previous_refs: &BTreeMap<String, RemoteRefState>,
+    current_refs: &BTreeMap<String, RemoteRefState>,
+    stamp: &str,
+) -> Vec<RefBackup> {
+    let mut branches = BTreeSet::new();
+    for refs in previous_refs.values() {
+        branches.extend(
+            refs.branches
+                .keys()
+                .filter(|branch| !is_internal_conflict_branch(branch))
+                .cloned(),
+        );
+    }
+
+    let mut backups = Vec::new();
+    for branch in branches {
+        if current_refs
+            .values()
+            .any(|refs| refs.branches.contains_key(&branch))
+        {
+            continue;
+        }
+        let mut seen_shas = BTreeSet::new();
+        for (remote, refs) in previous_refs {
+            let Some(sha) = refs.branches.get(&branch) else {
+                continue;
+            };
+            if !seen_shas.insert(sha.clone()) {
+                continue;
+            }
+            backups.push(RefBackup {
+                refname: format!(
+                    "refs/refray-backups/branches/{}/{}/deleted-everywhere-{}",
+                    hex_component(&branch),
+                    stamp,
+                    hex_component(remote)
+                ),
+                sha: sha.clone(),
+                description: format!(
+                    "branch {branch} from {remote} before all endpoints pruned it"
+                ),
+            });
+        }
+    }
+    backups
+}
+
+fn repo_ref_backups(
+    repo_name: &str,
+    refs_by_remote: &BTreeMap<String, RemoteRefState>,
+    stamp: &str,
+) -> Vec<RefBackup> {
+    let mut backups = Vec::new();
+    for (remote, refs) in refs_by_remote {
+        for (branch, sha) in &refs.branches {
+            backups.push(RefBackup {
+                refname: format!(
+                    "refs/refray-backups/repos/{}/{}/heads/{}",
+                    stamp,
+                    hex_component(remote),
+                    hex_component(branch)
+                ),
+                sha: sha.clone(),
+                description: format!("repo {repo_name} branch {branch} from {remote}"),
+            });
+        }
+        for (tag, sha) in &refs.tags {
+            backups.push(RefBackup {
+                refname: format!(
+                    "refs/refray-backups/repos/{}/{}/tags/{}",
+                    stamp,
+                    hex_component(remote),
+                    hex_component(tag)
+                ),
+                sha: sha.clone(),
+                description: format!("repo {repo_name} tag {tag} from {remote}"),
+            });
+        }
+    }
+    backups
+}
+
 fn hex_component(value: &str) -> String {
     const HEX: &[u8; 16] = b"0123456789abcdef";
     let mut output = String::with_capacity(value.len() * 2);
@@ -1504,6 +2213,9 @@ fn repo_deletion_decision(
     previous_refs: Option<&BTreeMap<String, RemoteRefState>>,
     current_refs: &BTreeMap<String, RemoteRefState>,
 ) -> RepoDeletionDecision {
+    if !mirror.delete_missing {
+        return RepoDeletionDecision::None;
+    }
     let Some(previous_refs) = previous_refs else {
         return RepoDeletionDecision::None;
     };

src/webhook.rs

@@ -8,7 +8,6 @@ use std::time::Duration;
 use anyhow::{Context, Result, bail};
 use console::style;
 use hmac::{Hmac, KeyInit, Mac};
-use regex::escape;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use sha2::Sha256;
@@ -18,9 +17,11 @@ use crate::config::{
     Config, EndpointConfig, MirrorConfig, ProviderKind, RepoNameFilter, default_work_dir,
     validate_config,
 };
-use crate::provider::{EndpointRepo, ProviderClient, RemoteRepo, list_mirror_repos};
+use crate::provider::{
+    EndpointRepo, ProviderClient, RemoteRepo, WebhookInstallOutcome, list_mirror_repos,
+};
 use crate::state::{load_toml_or_default, save_toml};
-use crate::sync::{SyncOptions, sync_all};
+use crate::sync::{SyncOptions, sync_all, sync_webhook_repo};
 
 type HmacSha256 = Hmac<Sha256>;
 const WEBHOOK_STATE_FILE: &str = "webhook-state.toml";
@@ -151,6 +152,7 @@ fn full_sync_timer_loop(
             &config,
             SyncOptions {
                 work_dir: work_dir.clone(),
+                jobs: config.jobs,
                 ..SyncOptions::default()
             },
         ) {
@@ -375,15 +377,12 @@ fn worker_loop(
         let _sync_guard = sync_lock
             .lock()
             .unwrap_or_else(|poisoned| poisoned.into_inner());
-        let result = sync_all(
+        let result = sync_webhook_repo(
             &config,
-            SyncOptions {
-                group: Some(job.group.clone()),
-                repo_pattern: Some(format!("^{}$", escape(&job.repo))),
-                work_dir: work_dir.clone(),
-                jobs: 1,
-                ..SyncOptions::default()
-            },
+            &job.group,
+            &job.repo,
+            work_dir.clone(),
+            config.jobs,
         );
         match result {
             Ok(()) => crate::logln!(
@@ -575,66 +574,73 @@ fn run_uninstall_tasks(tasks: Vec<WebhookUninstallTask>, jobs: usize) -> Result<
 
 fn install_webhook_task(task: WebhookInstallTask, state: &Arc<Mutex<WebhookState>>) -> Result<()> {
     let key = webhook_installation_key(&task.group, &task.endpoint, &task.repo.name);
-    crate::logln!(
-        "  {} {} {}",
-        style(if task.dry_run {
-            "would install"
-        } else {
-            "install"
-        })
-        .green()
-        .bold(),
-        style(&task.repo.name).cyan(),
-        style(format!("webhook on {}", task.endpoint.label())).dim()
-    );
     if task.dry_run {
+        crate::logln!(
+            "  {} {} {}",
+            style("would install").green().bold(),
+            style(&task.repo.name).cyan(),
+            style(format!("webhook on {}", task.endpoint.label())).dim()
+        );
         return Ok(());
     }
     let client = ProviderClient::new(&task.site)?;
-    if let Err(error) = client.install_webhook(&task.endpoint, &task.repo, &task.url, &task.secret)
-    {
-        if is_duplicate_webhook_error(&error) {
+    match client.install_webhook(&task.endpoint, &task.repo, &task.url, &task.secret) {
+        Ok(outcome) => {
+            let action = match outcome {
+                WebhookInstallOutcome::Created => "install",
+                WebhookInstallOutcome::Existing => "exists",
+            };
             crate::logln!(
                 "  {} {} {}",
-                style("exists").green().bold(),
+                style(action).green().bold(),
                 style(&task.repo.name).cyan(),
                 style(format!("webhook on {}", task.endpoint.label())).dim()
             );
             record_webhook_installation(state, key, task);
-            return Ok(());
+            Ok(())
         }
-        if let Some(reason) = non_actionable_webhook_failure_reason(&error) {
-            crate::logln!(
-                "  {} {} {}",
-                style("skip").yellow().bold(),
-                style(&task.repo.name).cyan(),
-                style(format!("webhook on {}: {reason}", task.endpoint.label())).dim()
-            );
-            let mut state = state
-                .lock()
-                .unwrap_or_else(|poisoned| poisoned.into_inner());
-            state.skipped.insert(
-                key,
-                SkippedWebhookInstallation {
-                    group: task.group,
-                    endpoint: task.endpoint,
-                    repo: task.repo.name,
-                    url: task.url,
-                    reason,
-                },
-            );
-            return Ok(());
+        Err(error) => {
+            if is_duplicate_webhook_error(&error) {
+                crate::logln!(
+                    "  {} {} {}",
+                    style("exists").green().bold(),
+                    style(&task.repo.name).cyan(),
+                    style(format!("webhook on {}", task.endpoint.label())).dim()
+                );
+                record_webhook_installation(state, key, task);
+                return Ok(());
+            }
+            if let Some(reason) = non_actionable_webhook_failure_reason(&error) {
+                crate::logln!(
+                    "  {} {} {}",
+                    style("skip").yellow().bold(),
+                    style(&task.repo.name).cyan(),
+                    style(format!("webhook on {}: {reason}", task.endpoint.label())).dim()
+                );
+                let mut state = state
+                    .lock()
+                    .unwrap_or_else(|poisoned| poisoned.into_inner());
+                state.skipped.insert(
+                    key,
+                    SkippedWebhookInstallation {
+                        group: task.group,
+                        endpoint: task.endpoint,
+                        repo: task.repo.name,
+                        url: task.url,
+                        reason,
+                    },
+                );
+                return Ok(());
+            }
+            Err(error).with_context(|| {
+                format!(
+                    "failed to install webhook for {} on {}",
+                    task.repo.name,
+                    task.endpoint.label()
+                )
+            })
         }
-        return Err(error).with_context(|| {
-            format!(
-                "failed to install webhook for {} on {}",
-                task.repo.name,
-                task.endpoint.label()
-            )
-        });
     }
-    record_webhook_installation(state, key, task);
-    Ok(())
 }
 
 fn record_webhook_installation(

tests/e2e/sequential.rs

@@ -341,6 +341,7 @@ name = "all"
 sync_visibility = "all"
 repo_whitelist = '{}'
 create_missing = {}
+delete_missing = true
 visibility = "public"
 conflict_resolution = "{}"
 
@@ -379,9 +380,10 @@ namespace = "{}"
         git(&work, ["tag", "v1.0.0"])?;
         let remote_url = source.authenticated_repo_url(&repo)?;
         self.git(&work, ["remote", "add", "origin", &remote_url])?;
-        self.git(
+        self.git_retry(
             &work,
             ["push", "origin", "HEAD:main", "feature/github", "v1.0.0"],
+            "initial seed push",
         )?;
         source.wait_branch(
             &repo,
@@ -392,6 +394,7 @@ namespace = "{}"
         source.wait_repo_listed(&repo)?;
         self.sync_repo(&repo, [])?;
         self.assert_branch_all_equal_after_optional_resync(&repo, MAIN_BRANCH)?;
+        self.assert_default_branch_all_except(&repo, MAIN_BRANCH, &source.site_name)?;
         self.assert_branch_all_equal(&repo, "feature/github")?;
         self.assert_tag_all_equal(&repo, "v1.0.0")?;
 
@@ -615,6 +618,7 @@ namespace = "{}"
         source.wait_branch_absent(&repo, "delete-me")?;
         self.sync_repo(&repo, [])?;
         self.assert_branch_absent_everywhere(&repo, "delete-me")?;
+        self.assert_backup_bundle_contains(&repo, "refs/refray-backups/branches/")?;
         Ok(())
     }
 
@@ -629,6 +633,7 @@ namespace = "{}"
         source.wait_repo_absent(&repo)?;
         self.sync_repo(&repo, [])?;
         self.assert_repo_absent_everywhere(&repo)?;
+        self.assert_backup_bundle_contains(&repo, "refs/refray-backups/repos/")?;
         Ok(())
     }
 
@@ -696,7 +701,7 @@ namespace = "{}"
         )?;
         let remote_url = provider.authenticated_repo_url(repo)?;
         self.git(&work, ["remote", "add", "origin", &remote_url])?;
-        self.git(&work, ["push", "origin", "HEAD:main"])?;
+        self.git_retry(&work, ["push", "origin", "HEAD:main"], "seed push")?;
         provider.wait_branch(
             repo,
             MAIN_BRANCH,
@@ -723,7 +728,11 @@ namespace = "{}"
         for provider in &self.settings.providers {
             let remote_url = provider.authenticated_repo_url(repo)?;
             self.git(&work, ["remote", "add", &provider.site_name, &remote_url])?;
-            self.git(&work, ["push", &provider.site_name, "HEAD:main"])?;
+            self.git_retry(
+                &work,
+                ["push", &provider.site_name, "HEAD:main"],
+                "seed-all push",
+            )?;
             provider.wait_branch(repo, MAIN_BRANCH, &sha)?;
             provider.wait_repo_listed(repo)?;
             provider.unprotect_branch(repo, MAIN_BRANCH)?;
@@ -784,6 +793,10 @@ namespace = "{}"
         assert_output_success(output, "git", &self.redactor)
     }
 
+    fn git_retry<const N: usize>(&self, path: &Path, args: [&str; N], label: &str) -> Result<()> {
+        retry(label, || self.git(path, args))
+    }
+
     fn set_repo_whitelist(&self, pattern: &str) -> Result<()> {
         let contents = fs::read_to_string(&self.config_path)
             .with_context(|| format!("failed to read {}", self.config_path.display()))?;
@@ -1061,6 +1074,30 @@ namespace = "{}"
         }
     }
 
+    fn assert_default_branch_all_except(
+        &self,
+        repo: &str,
+        branch: &str,
+        excluded_site: &str,
+    ) -> Result<()> {
+        retry("default branch metadata", || {
+            for provider in &self.settings.providers {
+                if provider.site_name == excluded_site {
+                    continue;
+                }
+                let actual = provider.default_branch(repo)?;
+                if actual.as_deref() != Some(branch) {
+                    bail!(
+                        "expected default branch {branch} on {} for {repo}, got {:?}",
+                        provider.site_name,
+                        actual
+                    );
+                }
+            }
+            Ok(())
+        })
+    }
+
     fn assert_tag_all_equal(&self, repo: &str, tag: &str) -> Result<()> {
         retry("tag convergence", || {
             let refs = self.refs_by_provider(repo)?;
@@ -1090,6 +1127,29 @@ namespace = "{}"
         })
     }
 
+    fn assert_backup_bundle_contains(&self, repo: &str, marker: &str) -> Result<()> {
+        let bundles = self.backup_bundles_for_repo(repo)?;
+        for bundle in &bundles {
+            let output = Command::new("git")
+                .args(["bundle", "list-heads", bundle.to_str().unwrap()])
+                .output()
+                .context("failed to run git bundle list-heads")?;
+            if output.status.success() && String::from_utf8_lossy(&output.stdout).contains(marker) {
+                return Ok(());
+            }
+        }
+        bail!(
+            "no local backup bundle for {repo} contained {marker}; checked {:?}",
+            bundles
+        )
+    }
+
+    fn backup_bundles_for_repo(&self, repo: &str) -> Result<Vec<PathBuf>> {
+        let mut bundles = Vec::new();
+        collect_backup_bundles(&self.cache_home, repo, &mut bundles)?;
+        Ok(bundles)
+    }
+
     fn assert_conflict_branch_exists(&self, repo: &str) -> Result<()> {
         retry("conflict branch", || {
             for refs in self.refs_by_provider(repo)?.values() {
@@ -1361,6 +1421,17 @@ impl ProviderAccount {
         }
     }
 
+    fn default_branch(&self, repo: &str) -> Result<Option<String>> {
+        let value = self
+            .get_json::<Value>(&self.repo_api_url(repo))
+            .with_context(|| format!("failed to inspect {} default branch", self.site_name))?;
+        Ok(value
+            .get("default_branch")
+            .and_then(Value::as_str)
+            .filter(|branch| !branch.is_empty())
+            .map(ToOwned::to_owned))
+    }
+
     fn wait_repo_present(&self, repo: &str) -> Result<()> {
         retry("repo present", || {
             if self.repo_exists(repo)? {
@@ -1951,6 +2022,26 @@ fn assert_output_success(output: Output, label: &str, redactor: &Redactor) -> Re
     )
 }
 
+fn collect_backup_bundles(dir: &Path, repo: &str, output: &mut Vec<PathBuf>) -> Result<()> {
+    if !dir.exists() {
+        return Ok(());
+    }
+    for entry in fs::read_dir(dir).with_context(|| format!("failed to read {}", dir.display()))? {
+        let entry = entry?;
+        let path = entry.path();
+        if path.is_dir() {
+            collect_backup_bundles(&path, repo, output)?;
+            continue;
+        }
+        if path.extension().and_then(|value| value.to_str()) == Some("bundle")
+            && path.to_string_lossy().contains(repo)
+        {
+            output.push(path);
+        }
+    }
+    Ok(())
+}
+
 fn retry(label: &str, mut action: impl FnMut() -> Result<()>) -> Result<()> {
     let mut last_error = None;
     for _ in 0..30 {

tests/unit/config.rs

@@ -25,6 +25,7 @@ fn parses_value_tokens() {
         repo_whitelist = "^important-|-mirror$"
         repo_blacklist = "-archive$"
         create_missing = true
+        delete_missing = false
         visibility = "private"
         conflict_resolution = "auto_rebase_pull_request"
 
@@ -57,6 +58,7 @@ fn parses_value_tokens() {
         config.mirrors[0].repo_blacklist,
         Some("-archive$".to_string())
     );
+    assert!(!config.mirrors[0].delete_missing);
     let webhook = config.webhook.unwrap();
     assert!(webhook.install);
     assert_eq!(webhook.url, "https://mirror.example.test/webhook");
@@ -92,6 +94,30 @@ fn config_defaults_jobs() {
     assert_eq!(config.jobs, DEFAULT_JOBS);
 }
 
+#[test]
+fn mirror_defaults_to_deleting_missing_repos_for_existing_configs() {
+    let config: Config = toml::from_str(
+        r#"
+        [[mirrors]]
+        name = "personal"
+        create_missing = true
+
+        [[mirrors.endpoints]]
+        site = "github"
+        kind = "user"
+        namespace = "alice"
+
+        [[mirrors.endpoints]]
+        site = "gitea"
+        kind = "user"
+        namespace = "alice"
+        "#,
+    )
+    .unwrap();
+
+    assert!(config.mirrors[0].delete_missing);
+}
+
 #[test]
 fn validation_rejects_unknown_sites_and_single_endpoint_groups() {
     let config = Config {
@@ -108,6 +134,7 @@ fn validation_rejects_unknown_sites_and_single_endpoint_groups() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -137,6 +164,7 @@ fn validation_rejects_unknown_sites_and_single_endpoint_groups() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -241,6 +269,7 @@ fn validation_rejects_duplicate_mirror_endpoints() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -287,6 +316,7 @@ fn mirror_config() -> MirrorConfig {
         repo_whitelist: None,
         repo_blacklist: None,
         create_missing: true,
+        delete_missing: true,
         visibility: Visibility::Private,
         conflict_resolution: ConflictResolutionStrategy::Fail,
     }

tests/unit/git.rs

@@ -41,6 +41,19 @@ fn detects_provider_disabled_repository_errors() {
     assert!(!is_disabled_repository_error(&generic_forbidden));
 }
 
+#[test]
+fn detects_missing_repository_errors() {
+    let error: anyhow::Error = GitCommandError::new(
+        "git ls-remote",
+        "",
+        "remote: Repository not found.\nfatal: repository 'https://github.com/alice/missing.git/' not found",
+    )
+    .into();
+
+    assert!(is_missing_repository_error(&error));
+    assert!(!is_disabled_repository_error(&error));
+}
+
 #[test]
 fn ls_remote_snapshot_changes_when_remote_refs_change() {
     let fixture = GitFixture::new();
@@ -275,6 +288,44 @@ fn delete_branches_removes_branch_from_target_remotes() {
     assert!(!fixture.remote_ref_exists(&fixture.remote_b, "refs/heads/main"));
 }
 
+#[test]
+fn backup_refs_create_restorable_bundle_before_branch_delete() {
+    let fixture = GitFixture::new();
+    let expected = fixture.commit("base", "base", 1_700_000_000);
+    fixture.push_head(&fixture.remote_a, "main");
+    fixture.push_head(&fixture.remote_b, "main");
+
+    let mirror = fixture.mirror();
+    fixture.fetch_all(&mirror);
+    let backup_ref = "refs/refray-backups/branches/main/test/a".to_string();
+    mirror
+        .backup_refs(&[RefBackup {
+            refname: backup_ref.clone(),
+            sha: expected.clone(),
+            description: "branch main before delete".to_string(),
+        }])
+        .unwrap();
+    let bundle = fixture._temp.path().join("branch-backup.bundle");
+    mirror
+        .create_bundle(&bundle, std::slice::from_ref(&backup_ref))
+        .unwrap();
+
+    mirror
+        .delete_branches(
+            &fixture.remotes(),
+            &[BranchDeletion {
+                branch: "main".to_string(),
+                deleted_remotes: vec!["a".to_string()],
+                target_remotes: vec!["b".to_string()],
+            }],
+        )
+        .unwrap();
+
+    let heads = git_output(None, ["bundle", "list-heads", bundle.to_str().unwrap()]);
+    assert!(heads.contains(&expected));
+    assert!(heads.contains(&backup_ref));
+}
+
 #[test]
 fn tag_decisions_mirror_matching_or_missing_tags_and_skip_divergent_tags() {
     let fixture = GitFixture::new();

tests/unit/interactive.rs

@@ -14,6 +14,8 @@ fn wizard_builds_sync_group_from_profile_urls() {
         "",
         "",
         "",
+        "",
+        "",
         "n",
         "4",
     ]
@@ -46,6 +48,7 @@ fn wizard_builds_sync_group_from_profile_urls() {
     assert_eq!(config.mirrors[0].endpoints[1].namespace, "azalea");
     assert_eq!(config.mirrors[0].sync_visibility, SyncVisibility::All);
     assert!(config.mirrors[0].create_missing);
+    assert!(config.mirrors[0].delete_missing);
     assert_eq!(config.mirrors[0].visibility, Visibility::Private);
     assert_eq!(
         config.mirrors[0].conflict_resolution,
@@ -54,6 +57,9 @@ fn wizard_builds_sync_group_from_profile_urls() {
 
     let output = String::from_utf8(output).unwrap();
     assert!(output.contains("1. github.com/hykilpikonna <-> gitea.example.test/azalea"));
+    assert!(output.contains("Deletion backups: refray keeps a local backup"));
+    assert!(output.contains("Create repositories that are missing from an endpoint?"));
+    assert!(output.contains("delete it everywhere?"));
     assert!(output.contains("Add another sync group"));
     assert!(output.contains("Edit an existing group"));
     assert!(output.contains("Delete an existing group"));
@@ -77,6 +83,8 @@ fn wizard_can_build_three_way_sync() {
         "",
         "",
         "",
+        "",
+        "",
         "n",
         "4",
     ]
@@ -92,6 +100,35 @@ fn wizard_can_build_three_way_sync() {
     assert_eq!(config.sites.len(), 3);
 }
 
+#[test]
+fn wizard_can_disable_missing_repo_creation_and_repo_delete_propagation() {
+    let input = [
+        "https://github.com/alice",
+        "gh-token",
+        "",
+        "https://gitea.example.test/alice",
+        "gt-token",
+        "",
+        "n",
+        "",
+        "",
+        "n",
+        "n",
+        "",
+        "n",
+        "4",
+    ]
+    .join("\n")
+        + "\n";
+    let mut reader = Cursor::new(input.as_bytes());
+    let mut output = Vec::new();
+
+    let config = run_config_wizard_with_io(Config::default(), &mut reader, &mut output).unwrap();
+
+    assert!(!config.mirrors[0].create_missing);
+    assert!(!config.mirrors[0].delete_missing);
+}
+
 #[test]
 fn wizard_can_enable_webhooks() {
     let input = [
@@ -105,6 +142,8 @@ fn wizard_can_enable_webhooks() {
         "",
         "",
         "",
+        "",
+        "",
         "y",
         "https://mirror.example.test/webhook",
         "y",
@@ -159,6 +198,8 @@ fn wizard_reuses_existing_credentials_for_same_instance() {
         "",
         "",
         "",
+        "",
+        "",
         "n",
         "4",
     ]
@@ -214,6 +255,7 @@ fn wizard_starts_existing_config_at_sync_group_menu() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -243,6 +285,7 @@ fn wizard_can_ask_to_run_full_sync_after_config() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -319,6 +362,7 @@ fn wizard_edits_existing_sync_group_from_menu() {
             repo_whitelist: Some("^important-".to_string()),
             repo_blacklist: Some("-archive$".to_string()),
             create_missing: false,
+            delete_missing: true,
             visibility: Visibility::Public,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -337,6 +381,8 @@ fn wizard_edits_existing_sync_group_from_menu() {
         "^public-",
         "-skip$",
         "",
+        "",
+        "",
         "n",
         "4",
     ]
@@ -356,6 +402,7 @@ fn wizard_edits_existing_sync_group_from_menu() {
     assert_eq!(mirror.endpoints[1].site, "gitlab");
     assert_eq!(mirror.endpoints[1].namespace, "bob");
     assert!(!mirror.create_missing);
+    assert!(mirror.delete_missing);
     assert_eq!(mirror.sync_visibility, SyncVisibility::Public);
     assert_eq!(mirror.repo_whitelist, Some("^public-".to_string()));
     assert_eq!(mirror.repo_blacklist, Some("-skip$".to_string()));
@@ -406,12 +453,13 @@ fn wizard_prefills_existing_sync_group_when_editing() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
         webhook: None,
     };
-    let input = ["2", "1", "", "", "", "", "n", "", "", "", "n", "4"].join("\n") + "\n";
+    let input = ["2", "1", "", "", "", "", "n", "", "", "", "", "", "n", "4"].join("\n") + "\n";
     let mut reader = Cursor::new(input.as_bytes());
     let mut output = Vec::new();
 
@@ -470,6 +518,7 @@ fn wizard_deletes_existing_sync_group_from_menu() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -529,6 +578,7 @@ fn wizard_can_go_back_from_delete_menu() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],

tests/unit/interactive_test_io.rs

@@ -65,6 +65,9 @@ where
     let endpoints = prompt_sync_group_endpoints(reader, writer, config, &[])?;
     let sync_visibility = prompt_sync_visibility(reader, writer, None)?;
     let repo_filters = prompt_repo_filters(reader, writer, None)?;
+    write_deletion_backup_notice(writer)?;
+    let create_missing = prompt_create_missing(reader, writer, None)?;
+    let delete_missing = prompt_delete_missing(reader, writer, None)?;
     let conflict_resolution = prompt_conflict_resolution(reader, writer, None)?;
     config.upsert_mirror(MirrorConfig {
         name: next_mirror_name(config),
@@ -72,7 +75,8 @@ where
         sync_visibility,
         repo_whitelist: repo_filters.whitelist,
         repo_blacklist: repo_filters.blacklist,
-        create_missing: true,
+        create_missing,
+        delete_missing,
         visibility: Visibility::Private,
         conflict_resolution,
     });
@@ -276,6 +280,8 @@ where
                     whitelist: config.mirrors[index - 1].repo_whitelist.clone(),
                     blacklist: config.mirrors[index - 1].repo_blacklist.clone(),
                 };
+                let existing_create_missing = config.mirrors[index - 1].create_missing;
+                let existing_delete_missing = config.mirrors[index - 1].delete_missing;
                 let existing_conflict_resolution =
                     config.mirrors[index - 1].conflict_resolution.clone();
                 let endpoints = prompt_sync_group_endpoints(reader, writer, config, &existing)?;
@@ -283,6 +289,11 @@ where
                     prompt_sync_visibility(reader, writer, Some(&existing_sync_visibility))?;
                 let repo_filters =
                     prompt_repo_filters(reader, writer, Some(&existing_repo_filters))?;
+                write_deletion_backup_notice(writer)?;
+                let create_missing =
+                    prompt_create_missing(reader, writer, Some(existing_create_missing))?;
+                let delete_missing =
+                    prompt_delete_missing(reader, writer, Some(existing_delete_missing))?;
                 let conflict_resolution = prompt_conflict_resolution(
                     reader,
                     writer,
@@ -292,6 +303,8 @@ where
                 config.mirrors[index - 1].sync_visibility = sync_visibility;
                 config.mirrors[index - 1].repo_whitelist = repo_filters.whitelist;
                 config.mirrors[index - 1].repo_blacklist = repo_filters.blacklist;
+                config.mirrors[index - 1].create_missing = create_missing;
+                config.mirrors[index - 1].delete_missing = delete_missing;
                 config.mirrors[index - 1].conflict_resolution = conflict_resolution;
                 prompt_webhook_setup(reader, writer, config)?;
                 writeln!(writer, "updated sync group {index}")?;
@@ -572,6 +585,51 @@ where
     Ok(parse_repo_pattern(&value))
 }
 
+fn write_deletion_backup_notice<W>(writer: &mut W) -> Result<()>
+where
+    W: Write,
+{
+    writeln!(
+        writer,
+        "Deletion backups: refray keeps a local backup before propagating repository or branch deletes."
+    )?;
+    Ok(())
+}
+
+fn prompt_create_missing<R, W>(
+    reader: &mut R,
+    writer: &mut W,
+    existing: Option<bool>,
+) -> Result<bool>
+where
+    R: BufRead,
+    W: Write,
+{
+    prompt_bool(
+        reader,
+        writer,
+        "Create repositories that are missing from an endpoint?",
+        existing.unwrap_or(true),
+    )
+}
+
+fn prompt_delete_missing<R, W>(
+    reader: &mut R,
+    writer: &mut W,
+    existing: Option<bool>,
+) -> Result<bool>
+where
+    R: BufRead,
+    W: Write,
+{
+    prompt_bool(
+        reader,
+        writer,
+        "When a previously synced repository is deleted from one endpoint, delete it everywhere?",
+        existing.unwrap_or(true),
+    )
+}
+
 fn sync_visibility_value(sync_visibility: &SyncVisibility) -> &'static str {
     match sync_visibility {
         SyncVisibility::All => "all",

tests/unit/provider.rs

@@ -225,6 +225,42 @@ fn list_gitlab_user_repos_merges_authenticated_owned_projects() {
     handle.join().unwrap();
 }
 
+#[test]
+fn list_gitlab_group_repos_ignores_deletion_scheduled_projects() {
+    let projects = r#"[
+        {"name":"active","path":"active","path_with_namespace":"maigolabs/active","http_url_to_repo":"https://gitlab.example.test/maigolabs/active.git","visibility":"private","description":null,"namespace":{"path":"maigolabs","full_path":"maigolabs"}},
+        {"name":"Kairos-deletion_scheduled-82068172","path":"Kairos-deletion_scheduled-82068172","path_with_namespace":"maigolabs/Kairos-deletion_scheduled-82068172","http_url_to_repo":"https://gitlab.example.test/maigolabs/Kairos-deletion_scheduled-82068172.git","visibility":"private","description":null,"namespace":{"path":"maigolabs","full_path":"maigolabs"}},
+        {"name":"marked-at","path":"marked-at","path_with_namespace":"maigolabs/marked-at","http_url_to_repo":"https://gitlab.example.test/maigolabs/marked-at.git","visibility":"private","description":null,"namespace":{"path":"maigolabs","full_path":"maigolabs"},"marked_for_deletion_at":"2026-05-17"},
+        {"name":"marked-on","path":"marked-on","path_with_namespace":"maigolabs/marked-on","http_url_to_repo":"https://gitlab.example.test/maigolabs/marked-on.git","visibility":"private","description":null,"namespace":{"path":"maigolabs","full_path":"maigolabs"},"marked_for_deletion_on":"2026-05-17"},
+        {"name":"pending","path":"pending","path_with_namespace":"maigolabs/pending","http_url_to_repo":"https://gitlab.example.test/maigolabs/pending.git","visibility":"private","description":null,"namespace":{"path":"maigolabs","full_path":"maigolabs"},"pending_delete":true}
+    ]"#;
+    let (api_url, handle) = one_request_server("200 OK", projects, |request| {
+        assert!(
+            request.starts_with(
+                "GET /groups/maigolabs/projects?simple=true&include_subgroups=false&per_page=100 "
+            ),
+            "request was {request}"
+        );
+    });
+    let site = SiteConfig {
+        api_url: Some(api_url),
+        ..site(ProviderKind::Gitlab, None)
+    };
+
+    let repos = ProviderClient::new(&site)
+        .unwrap()
+        .list_repos(&EndpointConfig {
+            site: "gitlab".to_string(),
+            kind: NamespaceKind::Group,
+            namespace: "maigolabs".to_string(),
+        })
+        .unwrap();
+
+    assert_eq!(repos.len(), 1);
+    assert_eq!(repos[0].name, "active");
+    handle.join().unwrap();
+}
+
 #[test]
 fn create_gitlab_repo_returns_existing_repo_when_path_is_taken() {
     let existing = r#"{"name":"repo","path":"repo","path_with_namespace":"alice/repo","http_url_to_repo":"https://gitlab.example.test/alice/repo.git","visibility":"public","description":"existing","namespace":{"path":"alice","full_path":"alice"}}"#;
@@ -282,6 +318,82 @@ fn create_gitlab_repo_returns_existing_repo_when_path_is_taken() {
     handle.join().unwrap();
 }
 
+#[test]
+fn set_github_default_branch_patches_repo() {
+    let (api_url, handle) = one_request_server("200 OK", "{}", |request| {
+        assert!(
+            request.starts_with("PATCH /repos/alice/repo "),
+            "request was {request}"
+        );
+        assert!(
+            request.contains(r#""default_branch":"main""#),
+            "request was {request}"
+        );
+        assert!(
+            request
+                .to_ascii_lowercase()
+                .contains("authorization: bearer secret"),
+            "request was {request}"
+        );
+    });
+    let site = SiteConfig {
+        api_url: Some(api_url),
+        ..site(ProviderKind::Github, None)
+    };
+
+    ProviderClient::new(&site)
+        .unwrap()
+        .set_default_branch(
+            &EndpointConfig {
+                site: "github".to_string(),
+                kind: NamespaceKind::User,
+                namespace: "alice".to_string(),
+            },
+            "repo",
+            "main",
+        )
+        .unwrap();
+    handle.join().unwrap();
+}
+
+#[test]
+fn set_gitlab_default_branch_updates_project() {
+    let (api_url, handle) = one_request_server("200 OK", "{}", |request| {
+        assert!(
+            request.starts_with("PUT /projects/alice%2Frepo "),
+            "request was {request}"
+        );
+        assert!(
+            request.contains(r#""default_branch":"main""#),
+            "request was {request}"
+        );
+        assert!(
+            request
+                .to_ascii_lowercase()
+                .contains("private-token: secret"),
+            "request was {request}"
+        );
+    });
+    let site = SiteConfig {
+        api_url: Some(api_url),
+        ..site(ProviderKind::Gitlab, None)
+    };
+
+    ProviderClient::new(&site)
+        .unwrap()
+        .set_default_branch(
+            &EndpointConfig {
+                site: "gitlab".to_string(),
+                kind: NamespaceKind::User,
+                namespace: "alice".to_string(),
+            },
+            "repo",
+            "main",
+        )
+        .unwrap();
+    handle.join().unwrap();
+}
+
 #[test]
 fn install_webhook_posts_github_hook_when_missing() {
     let (api_url, handle) = request_server(
@@ -309,7 +421,7 @@ fn install_webhook_posts_github_hook_when_missing() {
     };
     let client = ProviderClient::new(&site).unwrap();
 
-    client
+    let outcome = client
         .install_webhook(
             &EndpointConfig {
                 site: "github".to_string(),
@@ -326,6 +438,63 @@ fn install_webhook_posts_github_hook_when_missing() {
             "secret",
         )
         .unwrap();
+
+    assert_eq!(outcome, WebhookInstallOutcome::Created);
+    handle.join().unwrap();
+}
+
+#[test]
+fn install_webhook_reports_existing_forgejo_hook() {
+    let (api_url, handle) = request_server(
+        vec![
+            (
+                "200 OK",
+                r#"[{"id":42,"config":{"url":"https://mirror.example.test/webhook/"}}]"#,
+            ),
+            ("200 OK", r#"{"id":42}"#),
+        ],
+        |index, request| match index {
+            0 => assert!(
+                request.starts_with("GET /repos/alice/repo/hooks "),
+                "request was {request}"
+            ),
+            1 => {
+                assert!(
+                    request.starts_with("PATCH /repos/alice/repo/hooks/42 "),
+                    "request was {request}"
+                );
+                assert!(request.contains("https://mirror.example.test/webhook"));
+                assert!(request.contains("secret"));
+                assert!(request.contains("push"));
+            }
+            _ => unreachable!(),
+        },
+    );
+    let site = SiteConfig {
+        api_url: Some(api_url),
+        ..site(ProviderKind::Forgejo, None)
+    };
+    let client = ProviderClient::new(&site).unwrap();
+
+    let outcome = client
+        .install_webhook(
+            &EndpointConfig {
+                site: "forgejo".to_string(),
+                kind: NamespaceKind::User,
+                namespace: "alice".to_string(),
+            },
+            &RemoteRepo {
+                name: "repo".to_string(),
+                clone_url: "https://codeberg.org/alice/repo.git".to_string(),
+                private: true,
+                description: None,
+            },
+            "https://mirror.example.test/webhook",
+            "secret",
+        )
+        .unwrap();
+
+    assert_eq!(outcome, WebhookInstallOutcome::Existing);
     handle.join().unwrap();
 }
 
@@ -653,6 +822,44 @@ fn create_gitea_repo_returns_existing_repo_on_conflict() {
     handle.join().unwrap();
 }
 
+#[test]
+fn set_gitea_default_branch_patches_repo() {
+    let (api_url, handle) = one_request_server("200 OK", "{}", |request| {
+        assert!(
+            request.starts_with("PATCH /repos/alice/repo "),
+            "request was {request}"
+        );
+        assert!(
+            request.contains(r#""default_branch":"main""#),
+            "request was {request}"
+        );
+        assert!(
+            request
+                .to_ascii_lowercase()
+                .contains("authorization: token secret"),
+            "request was {request}"
+        );
+    });
+    let site = SiteConfig {
+        api_url: Some(api_url),
+        ..site(ProviderKind::Gitea, None)
+    };
+
+    ProviderClient::new(&site)
+        .unwrap()
+        .set_default_branch(
+            &EndpointConfig {
+                site: "gitea".to_string(),
+                kind: NamespaceKind::User,
+                namespace: "alice".to_string(),
+            },
+            "repo",
+            "main",
+        )
+        .unwrap();
+    handle.join().unwrap();
+}
+
 #[test]
 fn open_pull_request_posts_github_pull_when_missing() {
     let (api_url, handle) = request_server(

tests/unit/sync.rs

@@ -174,6 +174,29 @@ fn branch_deletion_decisions_ignore_internal_conflict_branches() {
     assert!(blocked.is_empty());
 }
 
+#[test]
+fn branches_deleted_everywhere_are_backed_up_before_prune() {
+    let mut previous = BTreeMap::new();
+    previous.insert(
+        "github".to_string(),
+        remote_ref_state("a", &[("main", "111")]),
+    );
+    previous.insert(
+        "gitea".to_string(),
+        remote_ref_state("b", &[("main", "111")]),
+    );
+
+    let backups = branches_deleted_everywhere_backups(&previous, &BTreeMap::new(), "stamp");
+
+    assert_eq!(backups.len(), 1);
+    assert_eq!(backups[0].sha, "111");
+    assert!(
+        backups[0]
+            .refname
+            .starts_with("refs/refray-backups/branches/")
+    );
+}
+
 #[test]
 fn repo_deletion_decision_propagates_previous_synced_repo_deletion() {
     let mirror = test_mirror();
@@ -208,6 +231,35 @@ fn repo_deletion_decision_propagates_previous_synced_repo_deletion() {
     );
 }
 
+#[test]
+fn repo_deletion_decision_is_disabled_by_mirror_policy() {
+    let mut mirror = test_mirror();
+    mirror.delete_missing = false;
+    let mut previous = BTreeMap::new();
+    previous.insert(
+        remote_key("github"),
+        remote_ref_state("a", &[("main", "111")]),
+    );
+    previous.insert(
+        remote_key("gitea"),
+        remote_ref_state("b", &[("main", "111")]),
+    );
+    let mut current = BTreeMap::new();
+    current.insert(
+        remote_key("gitea"),
+        remote_ref_state("b", &[("main", "111")]),
+    );
+
+    let decision = repo_deletion_decision(
+        &mirror,
+        &[endpoint_repo("gitea")],
+        Some(&previous),
+        &current,
+    );
+
+    assert_eq!(decision, RepoDeletionDecision::None);
+}
+
 #[test]
 fn repo_deletion_decision_conflicts_when_remaining_repo_changed() {
     let mirror = test_mirror();
@@ -396,6 +448,46 @@ fn endpoint_remote_names_do_not_slug_collide() {
     );
 }
 
+#[test]
+fn targeted_endpoint_repos_synthesize_clone_urls_without_listing() {
+    let mirror = MirrorConfig {
+        name: "sync-1".to_string(),
+        endpoints: vec![EndpointConfig {
+            site: "gitlab".to_string(),
+            kind: crate::config::NamespaceKind::Group,
+            namespace: "parent/child".to_string(),
+        }],
+        sync_visibility: crate::config::SyncVisibility::All,
+        repo_whitelist: None,
+        repo_blacklist: None,
+        create_missing: true,
+        delete_missing: true,
+        visibility: crate::config::Visibility::Private,
+        conflict_resolution: ConflictResolutionStrategy::Fail,
+    };
+    let config = Config {
+        jobs: crate::config::DEFAULT_JOBS,
+        sites: vec![crate::config::SiteConfig {
+            name: "gitlab".to_string(),
+            provider: crate::config::ProviderKind::Gitlab,
+            base_url: "https://gitlab.example.test/root".to_string(),
+            api_url: None,
+            token: crate::config::TokenConfig::Value("token".to_string()),
+            git_username: None,
+        }],
+        mirrors: vec![mirror.clone()],
+        webhook: None,
+    };
+
+    let repos = targeted_endpoint_repos(&config, &mirror, "repo").unwrap();
+
+    assert_eq!(repos.len(), 1);
+    assert_eq!(
+        repos[0].repo.clone_url,
+        "https://gitlab.example.test/root/parent/child/repo.git"
+    );
+}
+
 #[test]
 fn created_repo_visibility_follows_existing_public_repo() {
     let mirror = test_mirror();
@@ -440,6 +532,39 @@ fn created_repo_visibility_falls_back_to_config_without_template() {
     );
 }
 
+#[test]
+fn gitlab_invalid_project_name_errors_are_skippable() {
+    let error = anyhow::Error::msg(
+        r#"POST https://gitlab.com/api/v4/projects returned 400 Bad Request: {"message":{"project_namespace.path":["can only include non-accented letters, digits, '_', '-' and '.'. It must not start with '-', '_', or '.'."],"name":["can contain only letters, digits, emoji, '_', '.', '+', dashes, or spaces. It must start with a letter, digit, emoji, or '_'."]}}"#,
+    );
+
+    assert!(is_gitlab_invalid_project_name_error(&error));
+}
+
+#[test]
+fn gitlab_project_path_validation_matches_create_constraints() {
+    for name in ["Kairos", "needLe", "amaoke.app", "repo_1", "repo-1"] {
+        assert!(is_supported_gitlab_project_path(name), "{name}");
+    }
+
+    for name in [
+        "",
+        ".github",
+        "_private",
+        "-draft",
+        "repo.",
+        "repo_",
+        "repo-",
+        "repo.git",
+        "repo.atom",
+        "has space",
+        "has+plus",
+        "荞麦main",
+    ] {
+        assert!(!is_supported_gitlab_project_path(name), "{name}");
+    }
+}
+
 fn remote_ref_state(hash: &str, branches: &[(&str, &str)]) -> RemoteRefState {
     RemoteRefState {
         hash: hash.to_string(),
@@ -475,6 +600,7 @@ fn test_mirror() -> MirrorConfig {
         repo_whitelist: None,
         repo_blacklist: None,
         create_missing: true,
+        delete_missing: true,
         visibility: crate::config::Visibility::Private,
         conflict_resolution: ConflictResolutionStrategy::Fail,
     }

tests/unit/webhook.rs

@@ -115,6 +115,7 @@ fn matches_jobs_by_provider_and_namespace() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -142,6 +143,7 @@ fn matching_jobs_respects_repo_name_filters() {
         repo_whitelist: Some("^important-".to_string()),
         repo_blacklist: Some("-archive$".to_string()),
         create_missing: true,
+        delete_missing: true,
         visibility: Visibility::Private,
         conflict_resolution: ConflictResolutionStrategy::Fail,
     };
@@ -360,6 +362,7 @@ fn uninstall_webhooks_skips_blocked_provider_access() {
             repo_whitelist: None,
             repo_blacklist: None,
             create_missing: true,
+            delete_missing: true,
             visibility: Visibility::Private,
             conflict_resolution: ConflictResolutionStrategy::Fail,
         }],
@@ -713,6 +716,7 @@ fn filtered_mirror() -> MirrorConfig {
         repo_whitelist: Some("^important-".to_string()),
         repo_blacklist: Some("-archive$".to_string()),
         create_missing: true,
+        delete_missing: true,
         visibility: Visibility::Private,
         conflict_resolution: ConflictResolutionStrategy::Fail,
     }