docs(plan,spec): align enforce_owner_only_elevation to shipped parent-role authority

The plan's pre-receive-hook pseudocode judged owner-elevation authority on the
post-change `signer.role` (so a self-promoting Admin reads as Owner in the same
commit and self-authorizes the promotion — the exact escalation the gate exists
to stop). f249395 had fixed only the skip-predicate, leaving this final check
vulnerable. Align the plan's `enforce_owner_only_elevation` to the SHIPPED fix
(relicario-server/src/main.rs, aace6f1): derive `signer_may_manage_owners` from
`signer_parent = parent_role(signer.member_id)` (the signer's PRE-commit role;
None -> reject; genesis allowed) and gate on that, never the post-change role.

The spec was already policy-correct in prose ("a member-role-change granting
owner/admin must be signed by an owner") and did NOT carry the vulnerable
implementation detail; strengthened it with an explicit pre-commit-role note so
the design record pins the property and no one re-derives the vulnerable form.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TJo44YM3UbBjro2fG6NrKy

Cargo.lock

@@ -2166,17 +2166,20 @@ dependencies = [
  "clap_complete",
  "data-encoding",
  "dirs",
+ "ed25519-dalek",
  "hex",
  "image",
  "predicates",
  "qrcode",
  "rand",
+ "regex",
  "relicario-core",
  "reqwest",
  "rpassword",
  "rqrr",
  "serde",
  "serde_json",
+ "ssh-key",
  "tar",
  "tempfile",
  "url",

crates/relicario-cli/Cargo.toml

@@ -30,9 +30,12 @@ image = { version = "0.25", default-features = false, features = ["jpeg", "png"]
 rqrr = "0.7"
 reqwest = { version = "0.12", features = ["blocking", "json"] }
 qrcode = { version = "0.14", features = ["svg"] }
+ssh-key = { version = "0.6", features = ["ed25519", "std"] }
+regex = "1"
+tempfile = "3"
 
 [dev-dependencies]
 assert_cmd = "2"
 predicates = "3"
-tempfile = "3"
 serde_json = "1"
+ed25519-dalek = "2"

crates/relicario-cli/src/commands/mod.rs

@@ -14,6 +14,7 @@ pub mod edit;
 pub mod generate;
 pub mod get;
 pub mod import;
+pub mod org;
 pub mod init;
 pub mod list;
 pub mod rate;

crates/relicario-cli/src/commands/org.rs

@@ -0,0 +1,757 @@
+//! `relicario org` subcommands for multi-user org vault management.
+
+use std::fs;
+use std::path::Path;
+
+use anyhow::{Context, Result};
+use relicario_core::{
+    generate_org_key, wrap_org_key,
+    CollectionDef, MemberId, OrgCollections, OrgManifest, OrgMembers, OrgMeta, OrgRole, OrgMember,
+    encrypt_org_manifest,
+};
+
+use crate::org_session::atomic_write;
+
+pub fn run_init(dir: &Path, name: &str) -> Result<()> {
+    // Create directory structure
+    fs::create_dir_all(dir.join("items")).context("create items/")?;
+    fs::create_dir_all(dir.join("keys")).context("create keys/")?;
+
+    // Get caller's device info
+    let device_pubkey = crate::device::current_device_pubkey()
+        .context("read device key — run `relicario device add` first")?;
+
+    // Generate org master key
+    let org_key = generate_org_key();
+
+    // Wrap org key to caller's device key
+    let wrapped = wrap_org_key(&org_key, &device_pubkey)
+        .context("wrap org key to device key")?;
+
+    // Create initial members.json with caller as owner
+    let caller_id = MemberId::new();
+    let now = relicario_core::now_unix();
+    let member = OrgMember {
+        member_id: caller_id.clone(),
+        display_name: whoami(),
+        role: OrgRole::Owner,
+        ed25519_pubkey: device_pubkey,
+        collections: vec![],
+        added_at: now,
+        added_by: caller_id.clone(),
+    };
+    let mut members = OrgMembers::new();
+    members.members.push(member);
+
+    // Write wrapped key
+    let key_path = dir.join("keys").join(format!("{}.enc", caller_id.as_str()));
+    fs::write(&key_path, &wrapped).context("write caller key blob")?;
+
+    // Write org.json
+    let meta = OrgMeta::new(name.to_string());
+    let meta_json = serde_json::to_string_pretty(&meta)?;
+    atomic_write(&dir.join("org.json"), meta_json.as_bytes())?;
+
+    // Write members.json
+    let members_json = serde_json::to_string_pretty(&members)?;
+    atomic_write(&dir.join("members.json"), members_json.as_bytes())?;
+
+    // Write collections.json (empty)
+    let collections = OrgCollections::new();
+    let coll_json = serde_json::to_string_pretty(&collections)?;
+    atomic_write(&dir.join("collections.json"), coll_json.as_bytes())?;
+
+    // Write empty manifest.enc
+    let manifest = OrgManifest::new();
+    let manifest_bytes = encrypt_org_manifest(&manifest, &org_key)?;
+    atomic_write(&dir.join("manifest.enc"), &manifest_bytes)?;
+
+    // git init, then configure THIS repo to sign commits with the active device
+    // key. Org commits must be signed; the pre-receive hook verifies every one.
+    crate::helpers::git_run(dir, &["init"], "git init")?;
+    let device_name = crate::device::current_device()?
+        .ok_or_else(|| anyhow::anyhow!("no active device — run `relicario device add` first"))?;
+    crate::device::configure_git_signing(dir, &device_name)
+        .context("configure org repo signing")?;
+
+    // Stage everything and make the signed bootstrap commit via org_git_run
+    // (which does NOT disable signing, unlike helpers::git_run).
+    crate::org_session::org_git_run(dir, &["add", "."], "git add")?;
+    let commit_msg = format!(
+        "init: org vault \"{name}\"\n\nRelicario-Actor: {} {}\nRelicario-Action: org-init",
+        members.members[0].display_name,
+        caller_id.as_str()
+    );
+    crate::org_session::org_git_run(dir, &["commit", "-m", &commit_msg], "git commit")?;
+
+    println!("Org vault initialized at {}", dir.display());
+    println!("Your member ID: {}", caller_id.as_str());
+    Ok(())
+}
+
+fn whoami() -> String {
+    std::env::var("USER")
+        .or_else(|_| std::env::var("USERNAME"))
+        .unwrap_or_else(|_| "unknown".into())
+}
+
+pub fn run_add_member(
+    dir: &Path,
+    pubkey: &str,
+    name: &str,
+    role: OrgRole,
+) -> Result<()> {
+    let vault = crate::org_session::open_org_vault(Some(dir))?;
+    let caller = vault.current_member()?;
+    if !caller.role.can_manage_members() {
+        anyhow::bail!("only owners and admins can add members");
+    }
+    // Privilege-escalation guard: only an owner may create an owner or admin.
+    if matches!(role, OrgRole::Owner | OrgRole::Admin) && !caller.role.can_manage_owners() {
+        anyhow::bail!("only owners can add members with the owner or admin role");
+    }
+
+    let mut members = vault.load_members()?;
+
+    // Check pubkey not already present
+    if members.members.iter().any(|m| m.ed25519_pubkey.trim() == pubkey.trim()) {
+        anyhow::bail!("this public key is already registered in the org");
+    }
+
+    let new_id = MemberId::new();
+    let now = relicario_core::now_unix();
+    let wrapped = wrap_org_key(vault.key(), pubkey)
+        .context("wrap org key to new member's key")?;
+
+    fs::write(vault.member_key_path(&new_id), &wrapped)
+        .context("write member key blob")?;
+
+    members.members.push(OrgMember {
+        member_id: new_id.clone(),
+        display_name: name.to_string(),
+        role,
+        ed25519_pubkey: pubkey.trim().to_string(),
+        collections: vec![],
+        added_at: now,
+        added_by: caller.member_id.clone(),
+    });
+    vault.save_members(&members)?;
+
+    let commit_msg = format!(
+        "org: add member \"{name}\"\n\nRelicario-Actor: {} {}\nRelicario-Action: member-add\nRelicario-Member: {}",
+        caller.display_name, caller.member_id.as_str(), new_id.as_str()
+    );
+    crate::org_session::org_git_run(
+        &vault.root,
+        &["add", "members.json", &format!("keys/{}.enc", new_id.as_str())],
+        "git add",
+    )?;
+    crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "git commit")?;
+
+    println!("Added {} ({})", name, new_id.as_str());
+    Ok(())
+}
+
+pub fn run_remove_member(dir: &Path, member_id_prefix: &str) -> Result<()> {
+    let vault = crate::org_session::open_org_vault(Some(dir))?;
+    let caller = vault.current_member()?;
+    if !caller.role.can_manage_members() {
+        anyhow::bail!("only owners and admins can remove members");
+    }
+
+    let mut members = vault.load_members()?;
+    let target_id = resolve_member_id(&members, member_id_prefix)?;
+
+    let target = members.find_by_id(&target_id).unwrap();
+    if target.role == OrgRole::Owner && !caller.role.can_manage_owners() {
+        anyhow::bail!("only owners can remove other owners");
+    }
+    let target_name = target.display_name.clone();
+
+    // Delete key blob
+    let key_path = vault.member_key_path(&target_id);
+    if key_path.exists() { fs::remove_file(&key_path).context("delete key blob")?; }
+
+    members.members.retain(|m| m.member_id != target_id);
+    vault.save_members(&members)?;
+
+    let commit_msg = format!(
+        "org: remove member \"{target_name}\"\n\nRelicario-Actor: {} {}\nRelicario-Action: member-remove\nRelicario-Member: {}",
+        caller.display_name, caller.member_id.as_str(), target_id.as_str()
+    );
+    crate::org_session::org_git_run(
+        &vault.root,
+        &["add", "members.json", &format!("keys/{}.enc", target_id.as_str())],
+        "git add",
+    )?;
+    crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "git commit")?;
+
+    eprintln!("⚠ Run `relicario org rotate-key --dir {}` to complete revocation.", vault.root.display());
+    println!("Removed {}", target_name);
+    Ok(())
+}
+
+pub fn run_set_role(dir: &Path, member_id_prefix: &str, role: OrgRole) -> Result<()> {
+    let vault = crate::org_session::open_org_vault(Some(dir))?;
+    let caller = vault.current_member()?;
+
+    let mut members = vault.load_members()?;
+    let target_id = resolve_member_id(&members, member_id_prefix)?;
+
+    if matches!(role, OrgRole::Admin | OrgRole::Owner) && !caller.role.can_manage_owners() {
+        anyhow::bail!("only owners can promote to admin or owner");
+    }
+    if !caller.role.can_manage_members() {
+        anyhow::bail!("only owners and admins can change roles");
+    }
+
+    let target = members.find_by_id_mut(&target_id)
+        .ok_or_else(|| anyhow::anyhow!("member not found"))?;
+    let old_role = target.role;
+    target.role = role;
+    vault.save_members(&members)?;
+
+    let commit_msg = format!(
+        "org: set role {} → {:?}\n\nRelicario-Actor: {} {}\nRelicario-Action: member-role-change\nRelicario-Member: {}",
+        target_id.as_str(), role,
+        caller.display_name, caller.member_id.as_str(),
+        target_id.as_str()
+    );
+    crate::org_session::org_git_run(&vault.root, &["add", "members.json"], "git add")?;
+    crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "git commit")?;
+
+    println!("Changed role {:?} → {:?}", old_role, role);
+    Ok(())
+}
+
+pub fn run_create_collection(dir: &Path, slug: &str, display_name: &str) -> Result<()> {
+    let vault = crate::org_session::open_org_vault(Some(dir))?;
+    let caller = vault.current_member()?;
+    if !caller.role.can_manage_members() {
+        anyhow::bail!("only owners and admins can create collections");
+    }
+
+    let mut collections = vault.load_collections()?;
+    if collections.contains_slug(slug) {
+        anyhow::bail!("collection `{slug}` already exists");
+    }
+    if slug.is_empty() || slug.contains('/') || slug.contains('.') {
+        anyhow::bail!("invalid slug `{slug}` — no slashes or dots, no empty string");
+    }
+
+    collections.collections.push(CollectionDef {
+        slug: slug.to_string(),
+        display_name: display_name.to_string(),
+        created_by: caller.member_id.clone(),
+        created_at: relicario_core::now_unix(),
+    });
+    vault.save_collections(&collections)?;
+
+    let commit_msg = format!(
+        "org: create collection \"{slug}\"\n\nRelicario-Actor: {} {}\nRelicario-Action: collection-create\nRelicario-Collection: {slug}",
+        caller.display_name, caller.member_id.as_str()
+    );
+    crate::org_session::org_git_run(&vault.root, &["add", "collections.json"], "git add")?;
+    crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "git commit")?;
+
+    println!("Created collection `{slug}`");
+    Ok(())
+}
+
+pub fn run_grant(dir: &Path, member_id_prefix: &str, slug: &str) -> Result<()> {
+    let vault = crate::org_session::open_org_vault(Some(dir))?;
+    let caller = vault.current_member()?;
+    if !caller.role.can_manage_members() {
+        anyhow::bail!("only owners and admins can grant collection access");
+    }
+
+    let collections = vault.load_collections()?;
+    if !collections.contains_slug(slug) {
+        anyhow::bail!("collection `{slug}` does not exist — create it first");
+    }
+
+    let mut members = vault.load_members()?;
+    let target_id = resolve_member_id(&members, member_id_prefix)?;
+    let target = members.find_by_id_mut(&target_id).unwrap();
+    if target.collections.contains(&slug.to_string()) {
+        anyhow::bail!("member already has access to `{slug}`");
+    }
+    target.collections.push(slug.to_string());
+    vault.save_members(&members)?;
+
+    let commit_msg = format!(
+        "org: grant {slug} to {}\n\nRelicario-Actor: {} {}\nRelicario-Action: collection-grant\nRelicario-Collection: {slug}\nRelicario-Member: {}",
+        target_id.as_str(), caller.display_name, caller.member_id.as_str(), target_id.as_str()
+    );
+    crate::org_session::org_git_run(&vault.root, &["add", "members.json"], "git add")?;
+    crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "git commit")?;
+
+    println!("Granted `{slug}` to {}", target_id.as_str());
+    Ok(())
+}
+
+pub fn run_revoke(dir: &Path, member_id_prefix: &str, slug: &str) -> Result<()> {
+    let vault = crate::org_session::open_org_vault(Some(dir))?;
+    let caller = vault.current_member()?;
+    if !caller.role.can_manage_members() {
+        anyhow::bail!("only owners and admins can revoke collection access");
+    }
+
+    let mut members = vault.load_members()?;
+    let target_id = resolve_member_id(&members, member_id_prefix)?;
+    let target = members.find_by_id_mut(&target_id).unwrap();
+    if !target.collections.contains(&slug.to_string()) {
+        anyhow::bail!("member does not have access to `{slug}`");
+    }
+    target.collections.retain(|s| s != slug);
+    vault.save_members(&members)?;
+
+    let commit_msg = format!(
+        "org: revoke {slug} from {}\n\nRelicario-Actor: {} {}\nRelicario-Action: collection-revoke\nRelicario-Collection: {slug}\nRelicario-Member: {}",
+        target_id.as_str(), caller.display_name, caller.member_id.as_str(), target_id.as_str()
+    );
+    crate::org_session::org_git_run(&vault.root, &["add", "members.json"], "git add")?;
+    crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "git commit")?;
+
+    println!("Revoked `{slug}` from {}", target_id.as_str());
+    Ok(())
+}
+
+/// Resolve a member_id prefix (or full ID) to a MemberId.
+fn resolve_member_id(members: &OrgMembers, prefix: &str) -> Result<MemberId> {
+    let hits: Vec<_> = members.members.iter()
+        .filter(|m| m.member_id.as_str().starts_with(prefix))
+        .collect();
+    match hits.len() {
+        0 => anyhow::bail!("no member matches `{prefix}`"),
+        1 => Ok(hits[0].member_id.clone()),
+        _ => anyhow::bail!("ambiguous prefix `{prefix}` — {} matches", hits.len()),
+    }
+}
+
+pub fn run_rotate_key(dir: &Path) -> Result<()> {
+    // Pull latest state first to detect a concurrent rotation. We must
+    // distinguish three outcomes:
+    //   * success                       -> proceed
+    //   * no upstream / no remote        -> local-only org, proceed
+    //   * non-fast-forward / conflict    -> concurrent rotation, ABORT
+    let pull = std::process::Command::new("git")
+        .current_dir(dir)
+        .args(["pull", "--rebase"])
+        .output()
+        .context("spawn git pull --rebase")?;
+    if !pull.status.success() {
+        let stderr = String::from_utf8_lossy(&pull.stderr);
+        let no_upstream = stderr.contains("no tracking information")
+            || stderr.contains("There is no tracking information")
+            || stderr.contains("does not appear to be a git repository")
+            || stderr.contains("Could not read from remote repository")
+            || stderr.contains("No remote repository specified");
+        if no_upstream {
+            eprintln!("Note: no upstream configured; proceeding with local state.");
+        } else {
+            // Best-effort: leave the working tree clean for the retry.
+            let _ = std::process::Command::new("git")
+                .current_dir(dir)
+                .args(["rebase", "--abort"])
+                .output();
+            anyhow::bail!(
+                "Concurrent key rotation detected — pull and re-run org rotate-key."
+            );
+        }
+    }
+
+    let vault = crate::org_session::open_org_vault(Some(dir))?;
+    let caller = vault.current_member()?;
+    if !caller.role.can_manage_owners() {
+        anyhow::bail!("only owners can rotate the org master key");
+    }
+
+    let members = vault.load_members()?;
+    let new_org_key = relicario_core::generate_org_key();
+
+    // Re-wrap the org key for every current member.
+    let mut staged_paths: Vec<String> = Vec::new();
+    for member in &members.members {
+        let wrapped = wrap_org_key(&new_org_key, &member.ed25519_pubkey)
+            .with_context(|| format!("wrap key for {}", member.display_name))?;
+        let key_path = vault.member_key_path(&member.member_id);
+        crate::org_session::atomic_write(&key_path, &wrapped)
+            .with_context(|| format!("write key for {}", member.display_name))?;
+        staged_paths.push(format!("keys/{}.enc", member.member_id.as_str()));
+    }
+
+    // Re-encrypt EVERY item blob under the new key. Items live collection-scoped
+    // at items/<collection-slug>/<id>.enc. Decrypt with the old key (held in the
+    // open vault session) and re-encrypt with the new one, in place. Without this
+    // a removed member who kept the old key + a clone could still decrypt every
+    // pre-rotation item.
+    let items_root = vault.root().join("items");
+    if items_root.is_dir() {
+        for slug_entry in fs::read_dir(&items_root).context("read items/")? {
+            let slug_entry = slug_entry.context("read items/ entry")?;
+            let slug_dir = slug_entry.path();
+            if !slug_dir.is_dir() {
+                continue;
+            }
+            let slug = slug_entry.file_name().to_string_lossy().to_string();
+            for item_entry in fs::read_dir(&slug_dir)
+                .with_context(|| format!("read items/{slug}/"))?
+            {
+                let item_entry = item_entry.context("read item entry")?;
+                let item_path = item_entry.path();
+                if item_path.extension().and_then(|e| e.to_str()) != Some("enc") {
+                    continue;
+                }
+                let old_bytes = fs::read(&item_path)
+                    .with_context(|| format!("read {}", item_path.display()))?;
+                let item = relicario_core::decrypt_item(&old_bytes, vault.key())
+                    .with_context(|| format!("decrypt {}", item_path.display()))?;
+                let new_bytes = relicario_core::encrypt_item(&item, &new_org_key)
+                    .with_context(|| format!("re-encrypt {}", item_path.display()))?;
+                crate::org_session::atomic_write(&item_path, &new_bytes)?;
+                let file_name = item_entry.file_name().to_string_lossy().to_string();
+                staged_paths.push(format!("items/{slug}/{file_name}"));
+            }
+        }
+    }
+
+    // Re-encrypt the manifest with the new key.
+    let manifest = vault.load_manifest()?;
+    let new_manifest_bytes = relicario_core::encrypt_org_manifest(&manifest, &new_org_key)?;
+    crate::org_session::atomic_write(&vault.manifest_path(), &new_manifest_bytes)?;
+    staged_paths.push("manifest.enc".to_string());
+
+    // Commit
+    let mut add_args = vec!["add"];
+    let path_refs: Vec<&str> = staged_paths.iter().map(|s| s.as_str()).collect();
+    add_args.extend_from_slice(&path_refs);
+    crate::org_session::org_git_run(&vault.root, &add_args, "git add")?;
+
+    let commit_msg = format!(
+        "org: rotate org master key\n\nRelicario-Actor: {} {}\nRelicario-Action: key-rotate",
+        caller.display_name, caller.member_id.as_str()
+    );
+    crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "git commit")?;
+
+    println!(
+        "Key rotated. {} member key(s) re-wrapped; all item blobs + manifest re-encrypted.",
+        members.members.len()
+    );
+    Ok(())
+}
+
+pub fn run_status(dir: &Path) -> Result<()> {
+    let root = crate::org_session::org_dir(Some(dir))?;
+
+    let meta: relicario_core::OrgMeta = {
+        let s = fs::read_to_string(root.join("org.json")).context("read org.json")?;
+        serde_json::from_str(&s)?
+    };
+    let members: OrgMembers = {
+        let s = fs::read_to_string(root.join("members.json")).context("read members.json")?;
+        serde_json::from_str(&s)?
+    };
+    let collections: OrgCollections = {
+        let s = fs::read_to_string(root.join("collections.json")).context("read collections.json")?;
+        serde_json::from_str(&s)?
+    };
+
+    println!("Org: {} ({})", meta.display_name, meta.org_id.as_str());
+    println!();
+    println!("Members ({}):", members.members.len());
+    for m in &members.members {
+        let colls = if m.collections.is_empty() {
+            "(no collections)".to_string()
+        } else {
+            m.collections.join(", ")
+        };
+        println!("  {:?}  {}  {}  [{}]", m.role, m.member_id.as_str(), m.display_name, colls);
+    }
+    println!();
+    println!("Collections ({}):", collections.collections.len());
+    for c in &collections.collections {
+        println!("  {}  —  {}", c.slug, c.display_name);
+    }
+    Ok(())
+}
+
+#[derive(Debug, serde::Serialize)]
+pub struct AuditEvent {
+    pub commit: String,
+    pub timestamp: String,
+    /// Actor as resolved from the VERIFIED signing key (authoritative).
+    pub actor_name: Option<String>,
+    pub actor_id: Option<String>,
+    /// Actor id as CLAIMED by the commit trailer (advisory; for tamper-checking).
+    pub trailer_actor_id: Option<String>,
+    pub action: Option<String>,
+    pub collection: Option<String>,
+    pub item_id: Option<String>,
+    pub device_id: Option<String>,
+    /// True when the trailer's claimed actor disagrees with the verified signer,
+    /// or when no current member matches the signing key.
+    pub tampered: bool,
+}
+
+fn parse_trailer_block(commit: &str, timestamp: &str, trailers: &str) -> AuditEvent {
+    let mut ev = AuditEvent {
+        commit: commit.to_string(),
+        timestamp: timestamp.to_string(),
+        actor_name: None,
+        actor_id: None,
+        trailer_actor_id: None,
+        action: None,
+        collection: None,
+        item_id: None,
+        device_id: None,
+        tampered: false,
+    };
+    for line in trailers.lines() {
+        let line = line.trim();
+        if let Some(rest) = line.strip_prefix("Relicario-Actor:") {
+            // Contract format: "<name> <member_id>" (member_id is the last token).
+            let rest = rest.trim();
+            if let Some((_name, id)) = rest.rsplit_once(' ') {
+                ev.trailer_actor_id = Some(id.trim().to_string());
+            } else if !rest.is_empty() {
+                ev.trailer_actor_id = Some(rest.to_string());
+            }
+        } else if let Some(v) = line.strip_prefix("Relicario-Action:") {
+            ev.action = Some(v.trim().to_string());
+        } else if let Some(v) = line.strip_prefix("Relicario-Collection:") {
+            ev.collection = Some(v.trim().to_string());
+        } else if let Some(v) = line.strip_prefix("Relicario-Item:") {
+            ev.item_id = Some(v.trim().to_string());
+        } else if let Some(v) = line.strip_prefix("Relicario-Device:") {
+            ev.device_id = Some(v.trim().to_string());
+        }
+    }
+    ev
+}
+
+/// Resolve a commit's SSH signature fingerprint to a current member, mirroring
+/// the pre-receive hook: build an allowed_signers from members.json, inject it
+/// via GIT_CONFIG_*, run `git verify-commit --raw`, parse the SHA256: key from
+/// stderr. Returns None if the commit is unsigned or the signer is not a member.
+fn resolve_signer<'m>(
+    root: &Path,
+    commit: &str,
+    members: &'m relicario_core::OrgMembers,
+) -> Option<&'m relicario_core::OrgMember> {
+    use std::io::Write;
+    let mut tmp = tempfile::NamedTempFile::new().ok()?;
+    for m in &members.members {
+        let _ = writeln!(tmp, "relicario {}", m.ed25519_pubkey.trim());
+    }
+    let allowed_path = tmp.path();
+
+    let output = std::process::Command::new("git")
+        .current_dir(root)
+        .args(["verify-commit", "--raw", commit])
+        .env("GIT_CONFIG_COUNT", "1")
+        .env("GIT_CONFIG_KEY_0", "gpg.ssh.allowedSignersFile")
+        .env("GIT_CONFIG_VALUE_0", allowed_path.as_os_str())
+        .output()
+        .ok()?;
+    let stderr = String::from_utf8_lossy(&output.stderr);
+
+    let re = regex::Regex::new(r"key (SHA256:[A-Za-z0-9+/]+)").ok()?;
+    let fp = re.captures(&stderr)?.get(1)?.as_str().to_string();
+
+    members.members.iter().find(|m| {
+        relicario_core::fingerprint(&m.ed25519_pubkey).ok().as_deref() == Some(fp.as_str())
+    })
+}
+
+pub fn run_audit(
+    dir: &Path,
+    since: Option<&str>,
+    member_filter: Option<&str>,
+    collection_filter: Option<&str>,
+    action_filter: Option<&str>,
+    format: &str,
+) -> Result<()> {
+    // Spec surface is `--format <table|json>` (default table). Accept only those.
+    let json = match format {
+        "json" => true,
+        "table" => false,
+        other => anyhow::bail!("unknown --format `{other}` — use table or json"),
+    };
+    let root = crate::org_session::org_dir(Some(dir))?;
+
+    // members.json — needed to resolve each commit's verified signer to a member.
+    let members: relicario_core::OrgMembers = {
+        let s = fs::read_to_string(root.join("members.json")).context("read members.json")?;
+        serde_json::from_str(&s).context("parse members.json")?
+    };
+
+    // git log framed with a record separator (%x1e, U+001E) PER COMMIT and a
+    // field separator (%x1f, U+001F) between fields, so multi-line trailer
+    // values cannot misalign record boundaries. Committer date (%cI), not
+    // author date: it is what revocation/audit is anchored to.
+    let fmt = "%x1e%H%x1f%cI%x1f%(trailers:only=true,unfold=true)";
+    let mut args: Vec<String> = vec!["log".into(), format!("--format={fmt}")];
+    if let Some(s) = since {
+        args.push(format!("--since={s}"));
+    }
+
+    let output = std::process::Command::new("git")
+        .current_dir(&root)
+        .args(&args)
+        .output()
+        .context("git log")?;
+    let log = String::from_utf8_lossy(&output.stdout);
+
+    let mut events: Vec<AuditEvent> = Vec::new();
+    for record in log.split('\u{1e}') {
+        let record = record.trim_start_matches('\n');
+        if record.trim().is_empty() {
+            continue;
+        }
+        let mut fields = record.splitn(3, '\u{1f}');
+        let commit = fields.next().unwrap_or("").trim();
+        let ts = fields.next().unwrap_or("").trim();
+        let trailers = fields.next().unwrap_or("");
+        if commit.is_empty() {
+            continue;
+        }
+
+        let mut ev = parse_trailer_block(commit, ts, trailers);
+        if ev.action.is_none() {
+            continue; // not an org commit
+        }
+
+        // Resolve the VERIFIED signer and attribute it as the authoritative actor.
+        match resolve_signer(&root, commit, &members) {
+            Some(m) => {
+                ev.actor_name = Some(m.display_name.clone());
+                ev.actor_id = Some(m.member_id.as_str().to_string());
+                // Tampered if the trailer claims a different actor than the signer.
+                if let Some(claimed) = ev.trailer_actor_id.as_deref() {
+                    if claimed != m.member_id.as_str() {
+                        ev.tampered = true;
+                    }
+                }
+            }
+            None => {
+                // No current member matched the signature -> cannot trust the
+                // trailer's claimed actor.
+                ev.tampered = true;
+            }
+        }
+
+        if let Some(mid) = member_filter {
+            // Filter on the VERIFIED actor id, not the spoofable trailer.
+            if ev.actor_id.as_deref() != Some(mid) {
+                continue;
+            }
+        }
+        if let Some(col) = collection_filter {
+            if ev.collection.as_deref() != Some(col) {
+                continue;
+            }
+        }
+        if let Some(act) = action_filter {
+            if ev.action.as_deref() != Some(act) {
+                continue;
+            }
+        }
+        events.push(ev);
+    }
+
+    if json {
+        println!("{}", serde_json::to_string_pretty(&events)?);
+    } else {
+        println!("{:<44} {:<26} {:<20} {:<18} {}", "COMMIT", "TIMESTAMP", "ACTION", "ACTOR", "FLAG");
+        for ev in &events {
+            println!("{:<44} {:<26} {:<20} {:<18} {}",
+                ev.commit,
+                ev.timestamp,
+                ev.action.as_deref().unwrap_or("-"),
+                ev.actor_name.as_deref().unwrap_or("<unverified>"),
+                if ev.tampered { "TAMPERED" } else { "" },
+            );
+        }
+    }
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use relicario_core::{MemberId, OrgMembers, OrgRole, OrgMember};
+
+    #[test]
+    fn parse_trailers_extracts_relicario_fields() {
+        // Contract trailer shape: "Relicario-Actor: <name> <member_id>".
+        let raw = "Relicario-Actor: alice a1b2c3d4e5f6a1b2\nRelicario-Action: item-create\nRelicario-Collection: prod\n";
+        let event = parse_trailer_block("abc123", "2026-06-06T12:00:00+00:00", raw);
+        assert_eq!(event.action.as_deref(), Some("item-create"));
+        assert_eq!(event.collection.as_deref(), Some("prod"));
+        // The verified actor_id is resolved later from the signature, not the trailer;
+        // the trailer only populates trailer_actor_id here.
+        assert_eq!(event.trailer_actor_id.as_deref(), Some("a1b2c3d4e5f6a1b2"));
+        assert_eq!(event.actor_id, None);
+        assert!(!event.tampered);
+    }
+
+    fn alice() -> OrgMember {
+        OrgMember {
+            member_id: MemberId::new(),
+            display_name: "Alice".into(),
+            role: OrgRole::Member,
+            ed25519_pubkey: "ssh-ed25519 AAAA fake".into(),
+            collections: vec![],
+            added_at: 0,
+            added_by: MemberId::new(),
+        }
+    }
+
+    #[test]
+    fn new_key_differs_from_old_key() {
+        let k1 = relicario_core::generate_org_key();
+        let k2 = relicario_core::generate_org_key();
+        assert_ne!(*k1, *k2);
+    }
+
+    #[test]
+    fn set_role_changes_role() {
+        let mut members = OrgMembers::new();
+        let a = alice();
+        let id = a.member_id.clone();
+        members.members.push(a);
+        if let Some(m) = members.find_by_id_mut(&id) {
+            m.role = OrgRole::Admin;
+        }
+        assert_eq!(members.find_by_id(&id).unwrap().role, OrgRole::Admin);
+    }
+
+    #[test]
+    fn grant_adds_slug_to_member_collections() {
+        let mut members = OrgMembers::new();
+        let a = alice();
+        let id = a.member_id.clone();
+        members.members.push(a);
+
+        let m = members.find_by_id_mut(&id).unwrap();
+        if !m.collections.contains(&"prod".to_string()) {
+            m.collections.push("prod".to_string());
+        }
+        assert!(members.find_by_id(&id).unwrap().collections.contains(&"prod".to_string()));
+    }
+
+    #[test]
+    fn revoke_removes_slug_from_member_collections() {
+        let mut members = OrgMembers::new();
+        let mut a = alice();
+        a.collections = vec!["prod".into(), "dev".into()];
+        let id = a.member_id.clone();
+        members.members.push(a);
+
+        let m = members.find_by_id_mut(&id).unwrap();
+        m.collections.retain(|s| s != "prod");
+        assert!(!members.find_by_id(&id).unwrap().collections.contains(&"prod".to_string()));
+        assert!(members.find_by_id(&id).unwrap().collections.contains(&"dev".to_string()));
+    }
+}

crates/relicario-cli/src/device.rs

@@ -99,6 +99,48 @@ pub fn load_signing_key(name: &str) -> Result<Zeroizing<String>> {
     Ok(Zeroizing::new(key))
 }
 
+/// Read the active device's ed25519 public key (OpenSSH single-line format,
+/// e.g. `ssh-ed25519 AAAA... comment`) from `signing.pub`.
+///
+/// Errors if no device is selected (`devices/current` missing/empty) — the
+/// caller should hint the user to run `relicario device add` first.
+pub fn current_device_pubkey() -> Result<String> {
+    let name = current_device()?
+        .ok_or_else(|| anyhow::anyhow!("no active device — run `relicario device add` first"))?;
+    let path = device_dir(&name)?.join("signing.pub");
+    let pubkey = fs::read_to_string(&path)
+        .with_context(|| format!("read signing.pub for device '{name}'"))?;
+    let trimmed = pubkey.trim();
+    if trimmed.is_empty() {
+        anyhow::bail!("signing.pub for device '{name}' is empty");
+    }
+    Ok(trimmed.to_string())
+}
+
+/// Read the active device's 32-byte ed25519 seed from `signing.key`
+/// (OpenSSH private-key format).
+///
+/// The seed is the secret scalar used to sign org commits and to unwrap the
+/// org key. It is returned in `Zeroizing` so it is wiped on drop. Errors if no
+/// device is selected, the key file is unreadable, or the key is not ed25519.
+pub fn current_device_seed() -> Result<Zeroizing<[u8; 32]>> {
+    let name = current_device()?
+        .ok_or_else(|| anyhow::anyhow!("no active device — run `relicario device add` first"))?;
+    // load_signing_key reads signing.key as OpenSSH private-key text.
+    let pem = load_signing_key(&name)?;
+    let private = ssh_key::PrivateKey::from_openssh(pem.as_str())
+        .map_err(|e| anyhow::anyhow!("parse signing.key for device '{name}': {e}"))?;
+    let keypair = private
+        .key_data()
+        .ed25519()
+        .ok_or_else(|| anyhow::anyhow!("signing.key for device '{name}' is not ed25519"))?;
+    // Ed25519PrivateKey::as_ref() yields &[u8; 32] (verified: ssh-key 0.6.7
+    // private/ed25519.rs:42). Copy into a Zeroizing array so the seed is wiped.
+    let mut seed = Zeroizing::new([0u8; 32]);
+    seed.copy_from_slice(keypair.private.as_ref());
+    Ok(seed)
+}
+
 /// Load the deploy private key for a device.
 #[allow(dead_code)]
 pub fn load_deploy_key(name: &str) -> Result<Zeroizing<String>> {
@@ -127,6 +169,53 @@ pub fn delete_device_keys(name: &str) -> Result<()> {
     Ok(())
 }
 
+#[cfg(test)]
+mod seed_helper_tests {
+    use super::*;
+    use std::sync::Mutex;
+
+    // dirs::config_dir() reads process-wide env; serialize these tests.
+    static ENV_LOCK: Mutex<()> = Mutex::new(());
+
+    #[test]
+    fn current_device_seed_and_pubkey_round_trip() {
+        let _guard = ENV_LOCK.lock().unwrap();
+        let tmp = tempfile::tempdir().unwrap();
+        let prev_xdg = std::env::var_os("XDG_CONFIG_HOME");
+        std::env::set_var("XDG_CONFIG_HOME", tmp.path());
+
+        // Generate a real ed25519 device keypair (OpenSSH text) via core.
+        let (private_openssh, public_openssh) =
+            relicario_core::device::generate_keypair().unwrap();
+
+        // Lay out devices/test-dev/{signing.key,signing.pub} + devices/current.
+        let dir = device_dir("test-dev").unwrap();
+        std::fs::create_dir_all(&dir).unwrap();
+        std::fs::write(dir.join("signing.key"), private_openssh.as_str()).unwrap();
+        std::fs::write(dir.join("signing.pub"), &public_openssh).unwrap();
+        set_current_device("test-dev").unwrap();
+
+        // pubkey helper returns exactly the stored OpenSSH public line.
+        let got_pub = current_device_pubkey().unwrap();
+        assert_eq!(got_pub.trim(), public_openssh.trim());
+
+        // seed helper returns the 32-byte ed25519 seed; re-derive the public
+        // key from it and confirm it matches.
+        let seed = current_device_seed().unwrap();
+        let signing = ed25519_dalek::SigningKey::from_bytes(&seed);
+        let derived = signing.verifying_key();
+        let parsed_pub = ssh_key::PublicKey::from_openssh(&public_openssh).unwrap();
+        let parsed_bytes: &[u8] = parsed_pub.key_data().ed25519().unwrap().as_ref();
+        assert_eq!(derived.as_bytes().as_slice(), parsed_bytes);
+
+        // restore env
+        match prev_xdg {
+            Some(v) => std::env::set_var("XDG_CONFIG_HOME", v),
+            None => std::env::remove_var("XDG_CONFIG_HOME"),
+        }
+    }
+}
+
 /// Configure git in `vault_root` to:
 ///  - sign commits with the device's signing key (SSH format)
 ///  - push via SSH using the device's deploy key

crates/relicario-cli/src/main.rs

@@ -9,6 +9,7 @@ mod helpers;
 mod parse;
 mod prompt;
 mod session;
+mod org_session;
 
 use std::path::PathBuf;
 
@@ -206,6 +207,15 @@ enum Commands {
         #[command(subcommand)]
         cmd: RecoveryQrCmd,
     },
+
+    /// Manage a multi-user org vault.
+    Org {
+        /// Path to the org vault directory (overrides RELICARIO_ORG_DIR).
+        #[arg(long, global = true)]
+        dir: Option<PathBuf>,
+        #[command(subcommand)]
+        subcommand: OrgCommands,
+    },
 }
 
 #[derive(Subcommand)]
@@ -421,6 +431,16 @@ pub(crate) enum RecoveryQrCmd {
     Unwrap,
 }
 
+#[derive(clap::Subcommand)]
+pub(crate) enum OrgCommands {
+    /// Create a new org vault.
+    Init {
+        #[arg(long)]
+        name: String,
+    },
+    // Admin + item subcommands are added by later tasks (B10-B14).
+}
+
 fn main() -> Result<()> {
     let cli = Cli::parse();
     match cli.command {
@@ -455,6 +475,16 @@ fn main() -> Result<()> {
         Commands::Rate { passphrase } => commands::rate::cmd_rate(passphrase),
         Commands::Device { action } => commands::device::cmd_device(action),
         Commands::RecoveryQr { cmd } => commands::recovery_qr::cmd_recovery_qr(cmd),
+        Commands::Org { dir, subcommand } => {
+            let dir_path = dir.as_deref();
+            match subcommand {
+                OrgCommands::Init { name } => {
+                    let d = crate::org_session::org_dir(dir_path)?;
+                    commands::org::run_init(&d, &name)?;
+                    Ok(())
+                }
+            }
+        }
     }
 }
 

crates/relicario-cli/src/org_session.rs

@@ -0,0 +1,320 @@
+//! Unlocked org vault session: holds the org master key for the duration of a
+//! CLI invocation.
+
+use std::fs;
+use std::path::{Path, PathBuf};
+
+use anyhow::{bail, Context, Result};
+use zeroize::Zeroizing;
+
+use relicario_core::{
+    decrypt_item, decrypt_org_manifest, encrypt_item, encrypt_org_manifest,
+    Item, ItemId, MemberId, OrgCollections, OrgManifest, OrgMember, OrgMembers, OrgMeta,
+};
+
+pub struct UnlockedOrgVault {
+    pub root: PathBuf,
+    pub org_key: Zeroizing<[u8; 32]>,
+}
+
+impl UnlockedOrgVault {
+    pub fn root(&self) -> &Path { &self.root }
+    pub fn key(&self) -> &Zeroizing<[u8; 32]> { &self.org_key }
+
+    pub fn manifest_path(&self) -> PathBuf { self.root.join("manifest.enc") }
+
+    /// Collection-scoped item path: `items/<collection-slug>/<id>.enc`.
+    /// The leading slug segment is what the pre-receive hook authorizes against
+    /// members.json — it never decrypts the blob. The slug must be non-empty and
+    /// already validated.
+    pub fn item_path(&self, collection_slug: &str, id: &ItemId) -> PathBuf {
+        self.root
+            .join("items")
+            .join(collection_slug)
+            .join(format!("{}.enc", id.as_str()))
+    }
+
+    pub fn member_key_path(&self, id: &MemberId) -> PathBuf {
+        self.root.join("keys").join(format!("{}.enc", id.as_str()))
+    }
+    pub fn members_path(&self) -> PathBuf { self.root.join("members.json") }
+    pub fn collections_path(&self) -> PathBuf { self.root.join("collections.json") }
+    pub fn org_meta_path(&self) -> PathBuf { self.root.join("org.json") }
+
+    pub fn load_meta(&self) -> Result<OrgMeta> {
+        let s = fs::read_to_string(self.org_meta_path()).context("read org.json")?;
+        Ok(serde_json::from_str(&s).context("parse org.json")?)
+    }
+
+    pub fn load_members(&self) -> Result<OrgMembers> {
+        let s = fs::read_to_string(self.members_path()).context("read members.json")?;
+        Ok(serde_json::from_str(&s).context("parse members.json")?)
+    }
+
+    pub fn save_members(&self, members: &OrgMembers) -> Result<()> {
+        let json = serde_json::to_string_pretty(members)?;
+        atomic_write(&self.members_path(), json.as_bytes())
+    }
+
+    pub fn load_collections(&self) -> Result<OrgCollections> {
+        let s = fs::read_to_string(self.collections_path()).context("read collections.json")?;
+        Ok(serde_json::from_str(&s).context("parse collections.json")?)
+    }
+
+    pub fn save_collections(&self, collections: &OrgCollections) -> Result<()> {
+        let json = serde_json::to_string_pretty(collections)?;
+        atomic_write(&self.collections_path(), json.as_bytes())
+    }
+
+    pub fn load_manifest(&self) -> Result<OrgManifest> {
+        let bytes = fs::read(self.manifest_path()).context("read manifest.enc")?;
+        Ok(decrypt_org_manifest(&bytes, &self.org_key)?)
+    }
+
+    pub fn save_manifest(&self, manifest: &OrgManifest) -> Result<()> {
+        let bytes = encrypt_org_manifest(manifest, &self.org_key)?;
+        atomic_write(&self.manifest_path(), &bytes)
+    }
+
+    /// Encrypt + write an item under its collection directory, creating the
+    /// directory if needed. Returns the repo-relative path for git staging.
+    pub fn save_item(&self, collection_slug: &str, item: &Item) -> Result<String> {
+        let path = self.item_path(collection_slug, &item.id);
+        if let Some(parent) = path.parent() {
+            fs::create_dir_all(parent)
+                .with_context(|| format!("create {}", parent.display()))?;
+        }
+        let bytes = encrypt_item(item, &self.org_key)?;
+        atomic_write(&path, &bytes)?;
+        Ok(format!("items/{}/{}.enc", collection_slug, item.id.as_str()))
+    }
+
+    /// Read + decrypt an item from its collection directory.
+    pub fn load_item(&self, collection_slug: &str, id: &ItemId) -> Result<Item> {
+        let path = self.item_path(collection_slug, id);
+        let bytes = fs::read(&path)
+            .with_context(|| format!("read item {}", path.display()))?;
+        Ok(decrypt_item(&bytes, &self.org_key)?)
+    }
+
+    /// Delete an item blob. Missing file is not an error (partial-write
+    /// recovery, same as the personal-vault purge path).
+    pub fn remove_item(&self, collection_slug: &str, id: &ItemId) -> Result<()> {
+        let path = self.item_path(collection_slug, id);
+        match fs::remove_file(&path) {
+            Ok(()) => Ok(()),
+            Err(e) if e.kind() == std::io::ErrorKind::NotFound => Ok(()),
+            Err(e) => Err(anyhow::Error::from(e)
+                .context(format!("delete {}", path.display()))),
+        }
+    }
+
+    /// Bail unless `member` has `slug` in their collection grants. The slug
+    /// existence check is done separately by the caller against collections.json.
+    pub fn ensure_grant(member: &OrgMember, slug: &str) -> Result<()> {
+        if member.collections.iter().any(|c| c == slug) {
+            Ok(())
+        } else {
+            bail!(
+                "access denied: you do not have a grant for collection `{slug}` — ask an admin to run `relicario org grant`"
+            )
+        }
+    }
+
+    /// Load members.json and find the caller's member entry by matching the
+    /// current device's ed25519 fingerprint against each member's pubkey
+    /// fingerprint. Fingerprint comparison (not raw OpenSSH-string equality)
+    /// tolerates comment/whitespace differences in the serialized key.
+    pub fn current_member(&self) -> Result<relicario_core::OrgMember> {
+        let device_fp = current_device_fingerprint()?;
+        let members = self.load_members()?;
+        members
+            .members
+            .into_iter()
+            .find(|m| {
+                relicario_core::fingerprint(&m.ed25519_pubkey)
+                    .ok()
+                    .as_deref()
+                    == Some(device_fp.as_str())
+            })
+            .ok_or_else(|| {
+                anyhow::anyhow!(
+                    "your device key is not registered in this org — ask an admin to run `org add-member`"
+                )
+            })
+    }
+}
+
+/// Locate the org vault root from RELICARIO_ORG_DIR env var or --dir flag value.
+pub fn org_dir(dir_flag: Option<&std::path::Path>) -> Result<PathBuf> {
+    if let Some(d) = dir_flag {
+        return Ok(d.to_path_buf());
+    }
+    if let Ok(v) = std::env::var("RELICARIO_ORG_DIR") {
+        return Ok(PathBuf::from(v));
+    }
+    bail!("org vault location required: set RELICARIO_ORG_DIR or pass --dir <path>")
+}
+
+/// Open an org vault: locate the root, read members.json to find the caller's
+/// member entry (by ed25519 fingerprint), then unwrap their keys/<id>.enc to
+/// recover the org master key.
+pub fn open_org_vault(dir_flag: Option<&std::path::Path>) -> Result<UnlockedOrgVault> {
+    let root = org_dir(dir_flag)?;
+
+    let device_fp = current_device_fingerprint()?;
+    let members_json = fs::read_to_string(root.join("members.json"))
+        .context("read members.json — is this an org vault?")?;
+    let members: OrgMembers = serde_json::from_str(&members_json).context("parse members.json")?;
+    let member = members
+        .members
+        .iter()
+        .find(|m| {
+            relicario_core::fingerprint(&m.ed25519_pubkey)
+                .ok()
+                .as_deref()
+                == Some(device_fp.as_str())
+        })
+        .ok_or_else(|| anyhow::anyhow!("your device key is not in this org"))?;
+
+    // Load this member's wrapped key blob.
+    let key_path = root
+        .join("keys")
+        .join(format!("{}.enc", member.member_id.as_str()));
+    let wrapped =
+        fs::read(&key_path).with_context(|| format!("read {}", key_path.display()))?;
+
+    // Recover the device ed25519 seed and unwrap.
+    let seed = current_device_seed()?;
+    let org_key = relicario_core::unwrap_org_key(&wrapped, &seed)?;
+
+    Ok(UnlockedOrgVault { root, org_key })
+}
+
+/// OpenSSH SHA-256 fingerprint of the active device's signing key.
+fn current_device_fingerprint() -> Result<String> {
+    let name = crate::device::current_device()?
+        .ok_or_else(|| anyhow::anyhow!("no active device — run `relicario device add` first"))?;
+    let pub_path = crate::device::device_dir(&name)?.join("signing.pub");
+    let pubkey = fs::read_to_string(&pub_path)
+        .with_context(|| format!("read {}", pub_path.display()))?;
+    Ok(relicario_core::fingerprint(pubkey.trim())?)
+}
+
+/// Recover the active device's ed25519 seed (the 32-byte private scalar source)
+/// from its OpenSSH `signing.key`, for ECIES unwrap.
+fn current_device_seed() -> Result<Zeroizing<[u8; 32]>> {
+    let name = crate::device::current_device()?
+        .ok_or_else(|| anyhow::anyhow!("no active device — run `relicario device add` first"))?;
+    let key_pem = crate::device::load_signing_key(&name)?;
+    let private = ssh_key::PrivateKey::from_openssh(key_pem.as_str())
+        .map_err(|e| anyhow::anyhow!("parse device signing key: {e}"))?;
+    let ed = private
+        .key_data()
+        .ed25519()
+        .ok_or_else(|| anyhow::anyhow!("device signing key is not ed25519"))?;
+    // Ed25519PrivateKey derefs to its 32-byte seed.
+    let seed_bytes: &[u8] = ed.private.as_ref();
+    if seed_bytes.len() != 32 {
+        anyhow::bail!("ed25519 seed has wrong length: {}", seed_bytes.len());
+    }
+    let mut seed = Zeroizing::new([0u8; 32]);
+    seed.copy_from_slice(seed_bytes);
+    Ok(seed)
+}
+
+pub(crate) fn atomic_write(path: &Path, data: &[u8]) -> Result<()> {
+    let mut tmp = path.as_os_str().to_owned();
+    tmp.push(".tmp");
+    let tmp = PathBuf::from(tmp);
+    fs::write(&tmp, data).with_context(|| format!("write {}", tmp.display()))?;
+    fs::rename(&tmp, path).with_context(|| format!("rename {}", tmp.display()))?;
+    Ok(())
+}
+
+/// Run `git <args>` in the org repo, capturing output and replaying it on
+/// failure. Unlike `crate::helpers::git_run`, this does NOT inject
+/// `commit.gpgsign=false` / `core.hooksPath=/dev/null`: org commits MUST be
+/// signed (the pre-receive hook verifies every commit's signature), and the
+/// repo's signing config is established by `configure_git_signing` during
+/// `org init`.
+pub(crate) fn org_git_run(root: &Path, args: &[&str], context: &str) -> Result<()> {
+    let output = std::process::Command::new("git")
+        .current_dir(root)
+        .args(args)
+        .output()
+        .with_context(|| format!("{context}: failed to spawn git"))?;
+    if !output.status.success() {
+        if !output.stdout.is_empty() {
+            eprint!("{}", String::from_utf8_lossy(&output.stdout));
+        }
+        if !output.stderr.is_empty() {
+            eprint!("{}", String::from_utf8_lossy(&output.stderr));
+        }
+        anyhow::bail!("{context}: git failed ({})", output.status);
+    }
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tempfile::TempDir;
+    use std::fs;
+
+    fn make_vault(key: Zeroizing<[u8; 32]>) -> (TempDir, UnlockedOrgVault) {
+        let dir = TempDir::new().unwrap();
+        let root = dir.path().to_path_buf();
+        fs::create_dir_all(root.join("items")).unwrap();
+        fs::create_dir_all(root.join("keys")).unwrap();
+        let vault = UnlockedOrgVault { root, org_key: key };
+        (dir, vault)
+    }
+
+    #[test]
+    fn unlocked_org_vault_paths() {
+        let key = Zeroizing::new([0u8; 32]);
+        let (dir, vault) = make_vault(key);
+        let root = dir.path().to_path_buf();
+        assert_eq!(vault.manifest_path(), root.join("manifest.enc"));
+        assert_eq!(
+            vault.member_key_path(&MemberId("abc0def1abc0def1".into())),
+            root.join("keys/abc0def1abc0def1.enc")
+        );
+        assert_eq!(
+            vault.item_path("prod", &relicario_core::ItemId("0123456789abcdef".into())),
+            root.join("items/prod/0123456789abcdef.enc")
+        );
+    }
+
+    #[test]
+    fn save_and_load_manifest() {
+        let key = Zeroizing::new([0xAAu8; 32]);
+        let (dir, vault) = make_vault(key);
+        let _ = dir; // keep alive
+        let mut m = OrgManifest::new();
+        m.entries.push(relicario_core::OrgManifestEntry {
+            id: relicario_core::ItemId::new(),
+            r#type: relicario_core::ItemType::SecureNote,
+            title: "test".into(),
+            tags: vec![],
+            modified: 0,
+            trashed_at: None,
+            collection: "prod".into(),
+        });
+        vault.save_manifest(&m).unwrap();
+        let loaded = vault.load_manifest().unwrap();
+        assert_eq!(loaded.entries.len(), 1);
+    }
+
+    #[test]
+    fn save_and_load_members() {
+        let key = Zeroizing::new([0u8; 32]);
+        let (dir, vault) = make_vault(key);
+        let _ = dir;
+        let members = OrgMembers::new();
+        vault.save_members(&members).unwrap();
+        let loaded = vault.load_members().unwrap();
+        assert_eq!(loaded.schema_version, 1);
+    }
+}

crates/relicario-cli/tests/org_init.rs

@@ -0,0 +1,24 @@
+use tempfile::TempDir;
+
+fn run(args: &[&str]) -> std::process::Output {
+    std::process::Command::new(env!("CARGO_BIN_EXE_relicario"))
+        .args(args)
+        .output()
+        .expect("run relicario")
+}
+
+#[test]
+#[ignore] // requires a device key on disk; run manually or via org_init_signing
+fn org_init_creates_expected_files() {
+    let dir = TempDir::new().unwrap();
+    let path = dir.path().to_str().unwrap();
+    // `--dir` is a subcommand-scoped global on `org` (B14), so it must come
+    // AFTER `org init`, not before it (matches B10's OrgFixture).
+    let out = run(&["org", "init", "--dir", path, "--name", "Test Org"]);
+    assert!(out.status.success(), "stderr: {}", String::from_utf8_lossy(&out.stderr));
+    assert!(dir.path().join("org.json").exists());
+    assert!(dir.path().join("members.json").exists());
+    assert!(dir.path().join("collections.json").exists());
+    assert!(dir.path().join("manifest.enc").exists());
+    assert!(dir.path().join(".git").exists());
+}

crates/relicario-cli/tests/org_init_signing.rs

@@ -0,0 +1,145 @@
+use std::fs;
+use std::path::Path;
+use std::process::Command;
+use tempfile::TempDir;
+
+fn relicario(config_home: &Path, args: &[&str]) -> std::process::Output {
+    Command::new(env!("CARGO_BIN_EXE_relicario"))
+        .env("XDG_CONFIG_HOME", config_home)
+        .env("HOME", config_home) // belt-and-suspenders for dirs on all platforms
+        .args(args)
+        .output()
+        .expect("run relicario")
+}
+
+/// Like relicario() but also injects the git committer identity so that
+/// `git commit` inside `org init` doesn't fail with "Please tell me who you are."
+fn relicario_with_git_identity(config_home: &Path, args: &[&str]) -> std::process::Output {
+    Command::new(env!("CARGO_BIN_EXE_relicario"))
+        .env("XDG_CONFIG_HOME", config_home)
+        .env("HOME", config_home)
+        .env("GIT_AUTHOR_NAME", "Test Device")
+        .env("GIT_AUTHOR_EMAIL", "test@relicario.test")
+        .env("GIT_COMMITTER_NAME", "Test Device")
+        .env("GIT_COMMITTER_EMAIL", "test@relicario.test")
+        .args(args)
+        .output()
+        .expect("run relicario")
+}
+
+fn git(repo: &Path, args: &[&str]) -> std::process::Output {
+    Command::new("git")
+        .current_dir(repo)
+        .args(args)
+        .output()
+        .expect("run git")
+}
+
+/// Lay out device keys directly under `<config_home>/relicario/devices/<name>/`
+/// and set `devices/current` — mirrors the B2 seed_helper_tests approach.
+/// Returns the OpenSSH public key string so the caller can build an allowed_signers
+/// file for `git verify-commit`.
+fn seed_device(config_home: &Path, name: &str) -> String {
+    let (priv_openssh, pub_openssh) =
+        relicario_core::device::generate_keypair().expect("generate_keypair");
+
+    let dev_dir = config_home
+        .join("relicario")
+        .join("devices")
+        .join(name);
+    fs::create_dir_all(&dev_dir).expect("create device dir");
+    let signing_key_path = dev_dir.join("signing.key");
+    fs::write(&signing_key_path, priv_openssh.as_str())
+        .expect("write signing.key");
+    // ssh requires 0600 on private key files or it refuses to use them.
+    #[cfg(unix)]
+    {
+        use std::os::unix::fs::PermissionsExt;
+        fs::set_permissions(&signing_key_path, fs::Permissions::from_mode(0o600))
+            .expect("chmod signing.key");
+    }
+    fs::write(dev_dir.join("signing.pub"), &pub_openssh)
+        .expect("write signing.pub");
+    // Also write stub deploy key files so configure_git_signing doesn't trip on
+    // a missing deploy.key path (the git config value just points to the file;
+    // the file itself is never read during org init).
+    fs::write(dev_dir.join("deploy.key"), "").expect("write stub deploy.key");
+    fs::write(dev_dir.join("deploy.pub"), "").expect("write stub deploy.pub");
+
+    // Set this device as current.
+    let devices_dir = config_home.join("relicario").join("devices");
+    fs::write(devices_dir.join("current"), format!("{name}\n"))
+        .expect("write current");
+
+    pub_openssh
+}
+
+#[test]
+fn org_init_produces_a_signed_initial_commit() {
+    let cfg = TempDir::new().unwrap();
+    let org = TempDir::new().unwrap();
+
+    // Lay out the device key directly (no `device add` needed — it requires Gitea).
+    let pub_openssh = seed_device(cfg.path(), "test-dev");
+
+    // Initialize the org vault. `--dir` comes AFTER `org init` (B14 global).
+    // Inject git identity so the commit doesn't fail "Please tell me who you are."
+    let init = relicario_with_git_identity(
+        cfg.path(),
+        &["org", "init", "--dir", org.path().to_str().unwrap(), "--name", "Acme"],
+    );
+    assert!(
+        init.status.success(),
+        "org init failed:\nstdout: {}\nstderr: {}",
+        String::from_utf8_lossy(&init.stdout),
+        String::from_utf8_lossy(&init.stderr)
+    );
+
+    // The org repo must be configured to sign.
+    let cfg_out = git(org.path(), &["config", "commit.gpgsign"]);
+    assert_eq!(
+        String::from_utf8_lossy(&cfg_out.stdout).trim(),
+        "true",
+        "org repo must have commit.gpgsign=true"
+    );
+
+    // The HEAD commit object must carry a signature header.
+    let head = git(org.path(), &["cat-file", "commit", "HEAD"]);
+    let body = String::from_utf8_lossy(&head.stdout);
+    assert!(
+        body.contains("gpgsig "),
+        "HEAD commit must be signed (no gpgsig header found):\n{body}"
+    );
+
+    // Configure an allowed_signers file so `git verify-commit` can validate the
+    // SSH signature. The principal must match the committer email injected above.
+    let allowed_signers_path = cfg.path().join("allowed_signers");
+    let allowed_line = format!("test@relicario.test {}", pub_openssh.trim());
+    fs::write(&allowed_signers_path, format!("{allowed_line}\n"))
+        .expect("write allowed_signers");
+    git(
+        org.path(),
+        &[
+            "config",
+            "gpg.ssh.allowedSignersFile",
+            allowed_signers_path.to_str().unwrap(),
+        ],
+    );
+
+    // Now verify-commit should succeed.
+    let verify = git(org.path(), &["verify-commit", "HEAD"]);
+    assert!(
+        verify.status.success(),
+        "git verify-commit HEAD failed:\nstdout: {}\nstderr: {}",
+        String::from_utf8_lossy(&verify.stdout),
+        String::from_utf8_lossy(&verify.stderr)
+    );
+
+    // The commit body must carry the org-init action trailer.
+    let log_out = git(org.path(), &["log", "-1", "--format=%B"]);
+    let commit_body = String::from_utf8_lossy(&log_out.stdout);
+    assert!(
+        commit_body.contains("Relicario-Action: org-init"),
+        "HEAD commit body must contain 'Relicario-Action: org-init' trailer:\n{commit_body}"
+    );
+}

crates/relicario-server/Cargo.toml

@@ -5,6 +5,14 @@ edition = "2021"
 description = "Pre-receive Git hook for relicario password manager"
 license = "GPL-3.0-or-later"
 
+[lib]
+name = "relicario_server"
+path = "src/lib.rs"
+
+[[bin]]
+name = "relicario-server"
+path = "src/main.rs"
+
 [dependencies]
 relicario-core = { path = "../relicario-core" }
 anyhow = "1"

crates/relicario-server/src/lib.rs

@@ -0,0 +1,58 @@
+//! Library surface for relicario-server, exposing pure helpers used by the
+//! pre-receive hooks so they can be unit-tested.
+
+/// Classification of a single changed path inside an org repo.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum PathClass {
+    /// `members.json`, `collections.json`, `org.json` — only Owner/Admin may write.
+    Protected,
+    /// `items/<slug>/<id>.enc` — writer must hold a grant for `<slug>`.
+    Item { collection: String },
+    /// `keys/<id>.enc`, `manifest.enc`, `.gitignore`, etc. — gated only by the
+    /// per-commit signature check (signer must be a current member).
+    Unrestricted,
+    /// Structurally invalid path; commit must be rejected.
+    Rejected(String),
+}
+
+/// Classify a repo-relative path. Pure; no I/O.
+pub fn classify_path(path: &str) -> PathClass {
+    match path {
+        "members.json" | "collections.json" | "org.json" => return PathClass::Protected,
+        _ => {}
+    }
+
+    if let Some(rest) = path.strip_prefix("items/") {
+        // Expect exactly: <slug>/<id>.enc  → two segments after the prefix.
+        let segments: Vec<&str> = rest.split('/').collect();
+        if segments.len() != 2 {
+            return PathClass::Rejected("items path must be items/<slug>/<id>.enc".to_string());
+        }
+        let slug = segments[0];
+        if slug.is_empty() {
+            return PathClass::Rejected("empty collection slug in items path".to_string());
+        }
+        // Defense-in-depth: mirror `OrgCollections::validate` — a slug containing
+        // '.' (e.g. a `..`/`.` path-traversal attempt) is structurally invalid.
+        // git normalizes most `./` away before the hook sees the path, so this is
+        // unreachable today; it keeps the hook self-defensive regardless.
+        if slug.contains('.') {
+            return PathClass::Rejected(format!("invalid collection slug: {:?}", slug));
+        }
+        return PathClass::Item { collection: slug.to_string() };
+    }
+
+    PathClass::Unrestricted
+}
+
+/// Extract the `schema_version` field from any org JSON document.
+/// Returns an error if the field is absent or not a u32.
+pub fn extract_schema_version(json: &str) -> Result<u32, String> {
+    let value: serde_json::Value =
+        serde_json::from_str(json).map_err(|e| format!("parse json: {e}"))?;
+    value
+        .get("schema_version")
+        .and_then(|v| v.as_u64())
+        .map(|n| n as u32)
+        .ok_or_else(|| "missing or non-integer schema_version".to_string())
+}

crates/relicario-server/src/main.rs

@@ -6,6 +6,8 @@ use std::process::Command;
 use anyhow::{Context, Result};
 use clap::{Parser, Subcommand};
 use relicario_core::device::{DeviceEntry, RevokedEntry};
+use relicario_core::org::{OrgCollections, OrgMember, OrgMembers, OrgRole};
+use relicario_server::{classify_path, extract_schema_version, PathClass};
 
 #[derive(Parser)]
 #[command(name = "relicario-server")]
@@ -23,6 +25,13 @@ enum Commands {
     },
     /// Generate a pre-receive hook script.
     GenerateHook,
+    /// Verify a commit to an org vault: signature + role/path authorization.
+    VerifyOrgCommit {
+        /// The commit SHA to verify.
+        commit: String,
+    },
+    /// Generate an org pre-receive hook script.
+    GenerateOrgHook,
 }
 
 fn main() -> Result<()> {
@@ -31,6 +40,8 @@ fn main() -> Result<()> {
     match cli.command {
         Commands::VerifyCommit { commit } => verify_commit(&commit),
         Commands::GenerateHook => generate_hook(),
+        Commands::VerifyOrgCommit { commit } => verify_org_commit(&commit),
+        Commands::GenerateOrgHook => generate_org_hook(),
     }
 }
 
@@ -187,3 +198,408 @@ fn git_show(commit: &str, path: &str) -> Result<String> {
 
     Ok(String::from_utf8(output.stdout)?)
 }
+
+/// Verify the SSH signature on `commit` against the given org members and return
+/// the matching member. On any failure (unsigned, malformed, or unknown signer)
+/// this prints REJECT and calls `std::process::exit(1)`; it only returns on success.
+fn verify_org_signer(commit: &str, members: &OrgMembers) -> OrgMember {
+    // Build a temp allowed-signers file from every current member's pubkey.
+    let tmp = match tempfile::tempdir() {
+        Ok(t) => t,
+        Err(e) => {
+            eprintln!("REJECT: org commit {commit} — cannot create tempdir: {e}");
+            std::process::exit(1);
+        }
+    };
+    let allowed_path = tmp.path().join("allowed_signers");
+    let mut allowed_body = String::new();
+    for m in &members.members {
+        allowed_body.push_str("relicario ");
+        allowed_body.push_str(m.ed25519_pubkey.trim());
+        allowed_body.push('\n');
+    }
+    if let Err(e) = fs::write(&allowed_path, &allowed_body) {
+        eprintln!("REJECT: org commit {commit} — cannot write allowed_signers: {e}");
+        std::process::exit(1);
+    }
+
+    // Run git verify-commit --raw with the allowed-signers file injected.
+    let output = match Command::new("git")
+        .args(["verify-commit", "--raw", commit])
+        .env("GIT_CONFIG_COUNT", "1")
+        .env("GIT_CONFIG_KEY_0", "gpg.ssh.allowedSignersFile")
+        .env("GIT_CONFIG_VALUE_0", allowed_path.as_os_str())
+        .output()
+    {
+        Ok(o) => o,
+        Err(e) => {
+            eprintln!("REJECT: org commit {commit} — git verify-commit failed to run: {e}");
+            std::process::exit(1);
+        }
+    };
+    let stderr = String::from_utf8_lossy(&output.stderr);
+
+    // The org hook builds allowed_signers from EVERY current member, so a clean
+    // `git verify-commit` exit IS the security gate: a non-zero exit means the
+    // commit was unsigned, tampered, or signed by a non-member. Make that
+    // property explicit rather than relying on the stderr regex alone (regex
+    // output is fragile across git versions). The fingerprint parse + member
+    // mapping below then identifies WHICH member signed.
+    if !output.status.success() {
+        eprintln!(
+            "REJECT: org commit {commit} — signature did not verify against current members \
+             (git verify-commit exit {}): {}",
+            output.status.code().unwrap_or(-1),
+            stderr.trim()
+        );
+        std::process::exit(1);
+    }
+
+    // Parse the SHA-256 fingerprint from stderr (same regex as verify_commit).
+    let re = regex::Regex::new(r"key (SHA256:[A-Za-z0-9+/]+)").expect("static regex");
+    let signing_fp = match re.captures(&stderr).and_then(|c| c.get(1)) {
+        Some(m) => m.as_str().to_string(),
+        None => {
+            eprintln!(
+                "REJECT: org commit {commit} — no valid signature found (stderr: {})",
+                stderr.trim()
+            );
+            std::process::exit(1);
+        }
+    };
+
+    // Map fingerprint → member via relicario_core::fingerprint over each pubkey.
+    for m in &members.members {
+        if let Ok(fp) = relicario_core::fingerprint(&m.ed25519_pubkey) {
+            if fp == signing_fp {
+                return m.clone();
+            }
+        }
+    }
+
+    eprintln!(
+        "REJECT: org commit {commit} — signer (fingerprint {signing_fp}) is not a current org member"
+    );
+    std::process::exit(1);
+}
+
+fn verify_org_commit(commit: &str) -> Result<()> {
+    // Determine parent count from %P (space-separated parent SHAs; empty = root).
+    let parents_out = Command::new("git")
+        .args(["show", "-s", "--format=%P", commit])
+        .output()
+        .context("git show parents")?;
+    let parents_line = String::from_utf8_lossy(&parents_out.stdout);
+    let parents: Vec<&str> = parents_line.split_whitespace().collect();
+
+    // Merge commits are rejected. Org repos are linear (CLI uses pull --rebase).
+    if parents.len() > 1 {
+        eprintln!(
+            "REJECT: org commit {commit} — merge commits are not allowed in org vaults \
+             ({} parents); rebase instead",
+            parents.len()
+        );
+        std::process::exit(1);
+    }
+    let is_root = parents.is_empty();
+
+    // Load members.json AS OF THIS COMMIT so the genesis commit can authorize itself.
+    let members_json = match git_show(commit, "members.json") {
+        Ok(s) => s,
+        Err(_) => {
+            if is_root {
+                eprintln!("OK: org commit {commit} (root bootstrap - no members.json yet)");
+                return Ok(());
+            }
+            eprintln!("REJECT: org commit {commit} — members.json missing from non-root commit");
+            std::process::exit(1);
+        }
+    };
+    let members: OrgMembers =
+        serde_json::from_str(&members_json).context("parse members.json")?;
+    if members.members.is_empty() {
+        if is_root {
+            eprintln!("OK: org commit {commit} (root bootstrap - empty member list)");
+            return Ok(());
+        }
+        eprintln!("REJECT: org commit {commit} — members.json has no members");
+        std::process::exit(1);
+    }
+    members
+        .validate()
+        .map_err(|e| anyhow::anyhow!("members.json invalid: {e}"))?;
+
+    // Verify the signature and resolve the signing member (exits on failure).
+    let signer = verify_org_signer(commit, &members);
+
+    // Enumerate changed paths. Root has no parent to diff, so use ls-tree.
+    let changed_paths: Vec<String> = if is_root {
+        let out = Command::new("git")
+            .args(["ls-tree", "-r", "--name-only", commit])
+            .output()
+            .context("git ls-tree")?;
+        String::from_utf8_lossy(&out.stdout)
+            .lines()
+            .map(|l| l.trim().to_string())
+            .filter(|l| !l.is_empty())
+            .collect()
+    } else {
+        let out = Command::new("git")
+            .args(["diff-tree", "--no-commit-id", "-r", "--name-only", commit])
+            .output()
+            .context("git diff-tree")?;
+        String::from_utf8_lossy(&out.stdout)
+            .lines()
+            .map(|l| l.trim().to_string())
+            .filter(|l| !l.is_empty())
+            .collect()
+    };
+
+    // Authorize each changed path against the signing member's role/grants.
+    // collections.json (as of this commit) is loaded lazily on the first item
+    // path, for the L5 slug-existence check.
+    let mut collection_slugs: Option<Vec<String>> = None;
+    for path in &changed_paths {
+        match classify_path(path) {
+            PathClass::Rejected(why) => {
+                eprintln!("REJECT: org commit {commit} — invalid path `{path}`: {why}");
+                std::process::exit(1);
+            }
+            PathClass::Protected => {
+                if !signer.role.can_manage_members() {
+                    eprintln!(
+                        "REJECT: org commit {commit} — member '{}' (role {:?}) may not write protected file `{path}`",
+                        signer.display_name, signer.role
+                    );
+                    std::process::exit(1);
+                }
+                // Privilege-escalation gate: only an Owner may INTRODUCE or
+                // ELEVATE an owner/admin. An Admin may write members.json but
+                // must not mint owners/admins server-side (spec §148/158/271).
+                if path == "members.json" {
+                    enforce_owner_only_elevation(commit, is_root, &members, &signer);
+                }
+            }
+            PathClass::Item { collection } => {
+                // The signing member must hold an explicit grant for the slug.
+                if !signer.collections.iter().any(|c| c == &collection) {
+                    eprintln!(
+                        "REJECT: org commit {commit} — member '{}' lacks a grant for collection `{collection}` (path `{path}`)",
+                        signer.display_name
+                    );
+                    std::process::exit(1);
+                }
+                // Slug-existence (L5): the collection must exist in
+                // collections.json AS OF THIS COMMIT. A write into a
+                // granted-but-deleted (or never-created) collection is rejected.
+                let known = collection_slugs.get_or_insert_with(|| {
+                    git_show(commit, "collections.json")
+                        .ok()
+                        .and_then(|s| serde_json::from_str::<OrgCollections>(&s).ok())
+                        .map(|c| c.collections.into_iter().map(|d| d.slug).collect::<Vec<_>>())
+                        .unwrap_or_default()
+                });
+                if !known.iter().any(|s| s == &collection) {
+                    eprintln!(
+                        "REJECT: org commit {commit} — item write to collection `{collection}` whose slug is absent from collections.json (path `{path}`)"
+                    );
+                    std::process::exit(1);
+                }
+            }
+            PathClass::Unrestricted => {
+                // keys/<id>.enc, manifest.enc, etc. — signature check already passed.
+            }
+        }
+    }
+
+    // Schema-version monotonicity for the three JSON files (Task C2).
+    enforce_schema_monotonicity(commit, is_root, &changed_paths)?;
+
+    eprintln!(
+        "OK: org commit {commit} verified — signed by '{}' ({:?}), {} path(s) authorized",
+        signer.display_name,
+        signer.role,
+        changed_paths.len()
+    );
+    Ok(())
+}
+
+/// Reject the commit unless every newly-introduced or elevated owner/admin is
+/// authorized. The signer's AUTHORITY is their role in the PARENT state — the role
+/// they held BEFORE this commit — NOT the role this commit may grant them. Reading
+/// `signer.role` (which is parsed from the post-change members.json) would let an
+/// admin self-promote to owner and then pass this very gate with the owner role
+/// they are minting — the exact escalation H-C1 exists to stop. We diff the new
+/// members.json against the parent's by member_id and require an owner-authority
+/// signer for any member that BECOMES owner/admin (new entry, or a role elevated
+/// up to owner/admin). On genesis (root) the sole bootstrap owner is allowed.
+///
+/// `git_show_parent` is defined alongside `enforce_schema_monotonicity` below.
+fn enforce_owner_only_elevation(
+    commit: &str,
+    is_root: bool,
+    new_members: &OrgMembers,
+    signer: &OrgMember,
+) {
+    let is_privileged = |r: OrgRole| matches!(r, OrgRole::Owner | OrgRole::Admin);
+
+    // Genesis: the bootstrap commit introduces the sole owner; allow it.
+    if is_root {
+        return;
+    }
+
+    // Parent baseline. If members.json did not exist in the parent, every
+    // privileged member here is "new" and must be owner-signed.
+    let parent_members: Vec<(String, OrgRole)> = match git_show_parent(commit, "members.json") {
+        Ok(s) => serde_json::from_str::<OrgMembers>(&s)
+            .map(|m| {
+                m.members
+                    .into_iter()
+                    .map(|m| (m.member_id.0, m.role))
+                    .collect()
+            })
+            .unwrap_or_default(),
+        Err(_) => Vec::new(),
+    };
+    let parent_role = |id: &str| -> Option<OrgRole> {
+        parent_members.iter().find(|(mid, _)| mid == id).map(|(_, r)| *r)
+    };
+
+    // The signer's authority = their PARENT role. A member absent from the parent
+    // (brand new) has no prior authority and cannot mint owners/admins.
+    let signer_parent = parent_role(signer.member_id.as_str());
+    let signer_may_manage_owners = signer_parent.map_or(false, |r| r.can_manage_owners());
+
+    for m in &new_members.members {
+        if !is_privileged(m.role) {
+            continue;
+        }
+        // Skip ONLY if the role is unchanged from the parent (a no-op same-role
+        // entry). Any CHANGE into a privileged role — a new privileged member,
+        // Member→Admin/Owner, or Admin→Owner — must be owner-signed.
+        if parent_role(m.member_id.as_str()) == Some(m.role) {
+            continue;
+        }
+        // A new owner/admin, or a member elevated to owner/admin → owner-only,
+        // judged by the signer's PRE-commit authority.
+        if !signer_may_manage_owners {
+            eprintln!(
+                "REJECT: org commit {commit} — member '{}' (parent role {:?}) may not introduce or \
+                 elevate owner/admin '{}' to {:?}; only an owner may",
+                signer.display_name, signer_parent, m.display_name, m.role
+            );
+            std::process::exit(1);
+        }
+    }
+}
+
+fn generate_org_hook() -> Result<()> {
+    print!(
+        r#"#!/bin/bash
+# Relicario org pre-receive hook -- verify signatures + role/path authorization
+
+while read oldrev newrev refname; do
+  [ "$newrev" = "0000000000000000000000000000000000000000" ] && continue
+
+  if [ "$oldrev" = "0000000000000000000000000000000000000000" ]; then
+    commits=$(git rev-list "$newrev")
+  else
+    commits=$(git rev-list "$oldrev..$newrev")
+  fi
+
+  for commit in $commits; do
+    relicario-server verify-org-commit "$commit" || exit 1
+  done
+done
+"#
+    );
+    Ok(())
+}
+
+/// For each protected JSON file changed in this commit, ensure schema_version did
+/// not decrease vs the parent commit, and re-validate collections.json structure.
+fn enforce_schema_monotonicity(
+    commit: &str,
+    is_root: bool,
+    changed_paths: &[String],
+) -> Result<()> {
+    const VERSIONED: [&str; 3] = ["members.json", "collections.json", "org.json"];
+
+    for file in VERSIONED {
+        if !changed_paths.iter().any(|p| p == file) {
+            continue;
+        }
+
+        // A deletion of a protected file is not allowed.
+        let new_content = match git_show(commit, file) {
+            Ok(s) => s,
+            Err(_) => {
+                eprintln!(
+                    "REJECT: org commit {commit} — protected file `{file}` was deleted; \
+                     org vaults never delete {file}"
+                );
+                std::process::exit(1);
+            }
+        };
+        let new_version = match extract_schema_version(&new_content) {
+            Ok(v) => v,
+            Err(e) => {
+                eprintln!("REJECT: org commit {commit} — `{file}` invalid: {e}");
+                std::process::exit(1);
+            }
+        };
+
+        // collections.json structural validation.
+        if file == "collections.json" {
+            match serde_json::from_str::<relicario_core::org::OrgCollections>(&new_content) {
+                Ok(c) => {
+                    if let Err(e) = c.validate() {
+                        eprintln!("REJECT: org commit {commit} — collections.json invalid: {e}");
+                        std::process::exit(1);
+                    }
+                }
+                Err(e) => {
+                    eprintln!("REJECT: org commit {commit} — collections.json parse error: {e}");
+                    std::process::exit(1);
+                }
+            }
+        }
+
+        // On the root commit there is no parent baseline; any starting version is fine.
+        if is_root {
+            continue;
+        }
+
+        // Parent version: if the file did not exist in the parent (newly added),
+        // there is no prior version to regress against — accept.
+        if let Ok(old_content) = git_show_parent(commit, file) {
+            let old_version = match extract_schema_version(&old_content) {
+                Ok(v) => v,
+                Err(_) => {
+                    continue;
+                }
+            };
+            if new_version < old_version {
+                eprintln!(
+                    "REJECT: org commit {commit} — `{file}` schema_version decreased \
+                     ({old_version} -> {new_version})"
+                );
+                std::process::exit(1);
+            }
+        }
+    }
+
+    Ok(())
+}
+
+/// Read a file from a commit's FIRST PARENT tree: `git show {commit}^:{path}`.
+fn git_show_parent(commit: &str, path: &str) -> Result<String> {
+    let output = Command::new("git")
+        .args(["show", &format!("{}^:{}", commit, path)])
+        .output()
+        .context("git show parent")?;
+    if !output.status.success() {
+        anyhow::bail!("git show {}^:{} failed", commit, path);
+    }
+    Ok(String::from_utf8(output.stdout)?)
+}

crates/relicario-server/tests/org_hook.rs

@@ -0,0 +1,81 @@
+// Integration tests for relicario-server org-hook path classification.
+
+use relicario_server::{classify_path, PathClass};
+
+#[test]
+fn protected_files_are_classified_protected() {
+    assert_eq!(classify_path("members.json"), PathClass::Protected);
+    assert_eq!(classify_path("collections.json"), PathClass::Protected);
+    assert_eq!(classify_path("org.json"), PathClass::Protected);
+}
+
+#[test]
+fn item_write_yields_collection_slug() {
+    assert_eq!(
+        classify_path("items/prod/a1b2c3d4e5f6a1b2.enc"),
+        PathClass::Item { collection: "prod".to_string() }
+    );
+}
+
+#[test]
+fn item_write_nested_slug_is_rejected() {
+    // Slugs cannot contain '/', so a path with extra segments is malformed → Rejected.
+    assert_eq!(
+        classify_path("items/prod/sub/x.enc"),
+        PathClass::Rejected("items path must be items/<slug>/<id>.enc".to_string())
+    );
+}
+
+#[test]
+fn key_blobs_and_manifest_are_unrestricted() {
+    // keys/<id>.enc and manifest.enc are written by org operations; the SIGNATURE
+    // check (every commit must be signed by a current member) is the gate for them.
+    assert_eq!(classify_path("keys/a1b2c3d4e5f6a1b2.enc"), PathClass::Unrestricted);
+    assert_eq!(classify_path("manifest.enc"), PathClass::Unrestricted);
+}
+
+#[test]
+fn items_without_slug_segment_are_rejected() {
+    // Flat items/<id>.enc (the OLD, now-removed layout) is no longer valid.
+    assert_eq!(
+        classify_path("items/a1b2c3d4e5f6a1b2.enc"),
+        PathClass::Rejected("items path must be items/<slug>/<id>.enc".to_string())
+    );
+}
+
+#[test]
+fn empty_slug_segment_is_rejected() {
+    assert_eq!(
+        classify_path("items//x.enc"),
+        PathClass::Rejected("empty collection slug in items path".to_string())
+    );
+}
+
+#[test]
+fn dotted_slug_is_rejected() {
+    // Defense-in-depth (mirrors OrgCollections::validate): a slug containing '.'
+    // — e.g. a ".."/"." path-traversal attempt — is rejected.
+    assert_eq!(
+        classify_path("items/../x.enc"),
+        PathClass::Rejected("invalid collection slug: \"..\"".to_string())
+    );
+}
+
+use relicario_server::extract_schema_version;
+
+#[test]
+fn extract_schema_version_reads_field() {
+    let json = r#"{ "schema_version": 3, "members": [] }"#;
+    assert_eq!(extract_schema_version(json).unwrap(), 3);
+}
+
+#[test]
+fn extract_schema_version_errors_on_missing_field() {
+    let json = r#"{ "members": [] }"#;
+    assert!(extract_schema_version(json).is_err());
+}
+
+#[test]
+fn extract_schema_version_errors_on_garbage() {
+    assert!(extract_schema_version("not json").is_err());
+}

crates/relicario-server/tests/org_hook_signed.rs

@@ -0,0 +1,229 @@
+//! Integration tests for `relicario-server verify-org-commit` privilege gating.
+//!
+//! H-C1: only an Owner may introduce or elevate an owner/admin. An Admin who
+//! writes members.json must not be able to mint owners/admins.
+
+use std::fs;
+use std::path::{Path, PathBuf};
+use std::process::Command;
+
+use assert_cmd::Command as AssertCommand;
+use predicates::prelude::*;
+use relicario_core::device::generate_keypair;
+use tempfile::TempDir;
+
+fn write_keypair(dir: &Path, name: &str) -> (PathBuf, String) {
+    let (priv_pem, pub_line) = generate_keypair().expect("generate keypair");
+    let priv_path = dir.join(format!("{name}.key"));
+    fs::write(&priv_path, priv_pem.as_str()).unwrap();
+    #[cfg(unix)]
+    {
+        use std::os::unix::fs::PermissionsExt;
+        fs::set_permissions(&priv_path, fs::Permissions::from_mode(0o600)).unwrap();
+    }
+    (priv_path, pub_line)
+}
+
+fn git(repo: &Path, args: &[&str]) {
+    let status = Command::new("git").current_dir(repo).args(args).status().unwrap();
+    assert!(status.success(), "git {args:?} failed");
+}
+
+/// members.json content with two members; `member_id`s are fixed 16-hex.
+fn members_json(owner_pub: &str, admin_pub: &str, admin_role: &str) -> String {
+    format!(
+        r#"{{
+  "schema_version": 1,
+  "members": [
+    {{ "member_id": "1111111111111111", "display_name": "Owner", "role": "owner",
+       "ed25519_pubkey": "{}", "collections": [], "added_at": 0, "added_by": "1111111111111111" }},
+    {{ "member_id": "2222222222222222", "display_name": "Admin", "role": "{admin_role}",
+       "ed25519_pubkey": "{}", "collections": [], "added_at": 0, "added_by": "1111111111111111" }}
+  ]
+}}"#,
+        owner_pub.trim(),
+        admin_pub.trim()
+    )
+}
+
+/// Stage members.json, sign the commit with `signing_key`, return its SHA.
+fn signed_members_commit(
+    repo: &Path,
+    signing_key: &Path,
+    allowed: &Path,
+    msg: &str,
+    content: &str,
+) -> String {
+    fs::write(repo.join("members.json"), content).unwrap();
+    git(repo, &["add", "members.json"]);
+    let status = Command::new("git")
+        .current_dir(repo)
+        .args([
+            "-c", "gpg.format=ssh",
+            "-c", &format!("user.signingkey={}", signing_key.display()),
+            "-c", &format!("gpg.ssh.allowedSignersFile={}", allowed.display()),
+            "commit", "-S", "-q", "-m", msg,
+        ])
+        .status()
+        .unwrap();
+    assert!(status.success());
+    let out = Command::new("git").current_dir(repo).args(["rev-parse", "HEAD"]).output().unwrap();
+    String::from_utf8(out.stdout).unwrap().trim().to_string()
+}
+
+/// Set up an org repo whose root commit (signed by the owner) registers an
+/// owner + an admin. Returns (repo tmp, owner priv, admin priv, allowed file).
+fn bootstrap() -> (TempDir, PathBuf, PathBuf, PathBuf) {
+    let tmp = TempDir::new().unwrap();
+    let repo = tmp.path();
+    git(repo, &["init", "-q", "-b", "main"]);
+    git(repo, &["config", "user.email", "t@t"]);
+    git(repo, &["config", "user.name", "t"]);
+
+    let (owner_priv, owner_pub) = write_keypair(repo, "owner");
+    let (admin_priv, admin_pub) = write_keypair(repo, "admin");
+
+    let allowed = repo.join("allowed_signers");
+    fs::write(
+        &allowed,
+        format!("relicario {}\nrelicario {}\n", owner_pub.trim(), admin_pub.trim()),
+    )
+    .unwrap();
+
+    // Genesis: owner registers both members (admin starts as `admin`).
+    let genesis = members_json(&owner_pub, &admin_pub, "admin");
+    signed_members_commit(repo, &owner_priv, &allowed, "org-init", &genesis);
+
+    // also write org.json + collections.json so later commits are well-formed
+    fs::write(repo.join("org.json"),
+        r#"{"schema_version":1,"org_id":"abc0abc0abc0abc0","display_name":"Acme","created_at":0}"#).unwrap();
+    fs::write(repo.join("collections.json"), r#"{"schema_version":1,"collections":[]}"#).unwrap();
+    git(repo, &["add", "org.json", "collections.json"]);
+    // sign this housekeeping commit with the owner too
+    let _ = signed_members_commit(repo, &owner_priv, &allowed, "scaffold",
+        &members_json(&owner_pub, &admin_pub, "admin"));
+
+    (tmp, owner_priv, admin_priv, allowed)
+}
+
+#[test]
+fn admin_self_promote_to_owner_is_rejected() {
+    let (tmp, owner_priv, admin_priv, allowed) = bootstrap();
+    let repo = tmp.path();
+    let owner_pub = fs::read_to_string(repo.join("allowed_signers")).unwrap();
+    // Reconstruct pubkeys from the allowed_signers file (two "relicario <pub>" lines).
+    let lines: Vec<String> = owner_pub.lines()
+        .map(|l| l.trim_start_matches("relicario ").to_string()).collect();
+    let (op, ap) = (lines[0].clone(), lines[1].clone());
+    let _ = owner_priv;
+
+    // Admin signs a members.json that elevates THEMSELVES to owner.
+    let escalated = members_json(&op, &ap, "owner");
+    let sha = signed_members_commit(repo, &admin_priv, &allowed, "self-promote", &escalated);
+
+    AssertCommand::cargo_bin("relicario-server")
+        .unwrap()
+        .current_dir(repo)
+        .args(["verify-org-commit", &sha])
+        .assert()
+        .failure()
+        .stderr(predicate::str::contains("only an owner"));
+}
+
+#[test]
+fn owner_promoting_an_admin_is_accepted() {
+    let (tmp, owner_priv, _admin_priv, allowed) = bootstrap();
+    let repo = tmp.path();
+    let allowed_body = fs::read_to_string(repo.join("allowed_signers")).unwrap();
+    let lines: Vec<String> = allowed_body.lines()
+        .map(|l| l.trim_start_matches("relicario ").to_string()).collect();
+    let (op, ap) = (lines[0].clone(), lines[1].clone());
+
+    // Owner signs a members.json that elevates the admin to owner — allowed.
+    let promoted = members_json(&op, &ap, "owner");
+    let sha = signed_members_commit(repo, &owner_priv, &allowed, "promote-admin", &promoted);
+
+    AssertCommand::cargo_bin("relicario-server")
+        .unwrap()
+        .current_dir(repo)
+        .args(["verify-org-commit", &sha])
+        .assert()
+        .success();
+}
+
+#[test]
+fn commit_signed_by_non_member_is_rejected() {
+    // A commit signed by a key that is NOT in members.json must be rejected:
+    // verify_org_signer rebuilds allowed_signers from the current members only,
+    // so a non-member signature fails `git verify-commit`.
+    let (tmp, _owner_priv, _admin_priv, allowed) = bootstrap();
+    let repo = tmp.path();
+
+    // A stranger key, never registered as a member.
+    let (stranger_priv, _stranger_pub) = write_keypair(repo, "stranger");
+
+    // Stranger signs a commit touching an UNRESTRICTED file (members.json stays
+    // owner+admin, so allowed_signers excludes the stranger).
+    fs::write(repo.join("manifest.enc"), b"\x02ciphertext").unwrap();
+    git(repo, &["add", "manifest.enc"]);
+    let status = Command::new("git")
+        .current_dir(repo)
+        .args([
+            "-c", "gpg.format=ssh",
+            "-c", &format!("user.signingkey={}", stranger_priv.display()),
+            "-c", &format!("gpg.ssh.allowedSignersFile={}", allowed.display()),
+            "commit", "-S", "-q", "-m", "stranger-write",
+        ])
+        .status()
+        .unwrap();
+    assert!(status.success());
+    let out = Command::new("git")
+        .current_dir(repo)
+        .args(["rev-parse", "HEAD"])
+        .output()
+        .unwrap();
+    let sha = String::from_utf8(out.stdout).unwrap().trim().to_string();
+
+    AssertCommand::cargo_bin("relicario-server")
+        .unwrap()
+        .current_dir(repo)
+        .args(["verify-org-commit", &sha])
+        .assert()
+        .failure()
+        .stderr(predicate::str::contains("REJECT"));
+}
+
+#[test]
+fn genesis_bootstrap_with_sole_owner_is_accepted() {
+    // A root (parent-less) commit registering the sole owner, signed by that
+    // owner, is the genesis bootstrap and must be accepted.
+    let tmp = TempDir::new().unwrap();
+    let repo = tmp.path();
+    git(repo, &["init", "-q", "-b", "main"]);
+    git(repo, &["config", "user.email", "t@t"]);
+    git(repo, &["config", "user.name", "t"]);
+
+    let (owner_priv, owner_pub) = write_keypair(repo, "owner");
+    let allowed = repo.join("allowed_signers");
+    fs::write(&allowed, format!("relicario {}\n", owner_pub.trim())).unwrap();
+
+    let sole_owner = format!(
+        r#"{{
+  "schema_version": 1,
+  "members": [
+    {{ "member_id": "1111111111111111", "display_name": "Owner", "role": "owner",
+       "ed25519_pubkey": "{}", "collections": [], "added_at": 0, "added_by": "1111111111111111" }}
+  ]
+}}"#,
+        owner_pub.trim()
+    );
+    // First commit in a fresh repo → root (is_root == true).
+    let sha = signed_members_commit(repo, &owner_priv, &allowed, "org-init", &sole_owner);
+
+    AssertCommand::cargo_bin("relicario-server")
+        .unwrap()
+        .current_dir(repo)
+        .args(["verify-org-commit", &sha])
+        .assert()
+        .success();
+}

docs/superpowers/plans/2026-06-06-enterprise-org-vault.md

@@ -4546,6 +4546,14 @@ fn verify_org_commit(commit: &str) -> Result<()> {
 /// role elevated up to Owner/Admin). On genesis (root), the sole bootstrap
 /// owner the commit introduces is allowed (it has no parent baseline).
 ///
+/// CRITICAL: the signer's authority is judged on their role in the PARENT
+/// commit (`parent_role(signer)`), NOT the post-change `signer.role` carried in
+/// the commit under verification. Reading `signer.role` would let an Admin
+/// self-promote to Owner in the same commit and then self-authorize that very
+/// promotion (the gate would see the already-elevated role and pass) — the
+/// exact escalation this exists to stop. A signer absent from the parent
+/// (`None`) has no prior authority and is rejected.
+///
 /// `git_show_parent` is defined in Task C2 (same file, same crate).
 fn enforce_owner_only_elevation(
     commit: &str,
@@ -4579,6 +4587,12 @@ fn enforce_owner_only_elevation(
         parent_members.iter().find(|(mid, _)| mid == id).map(|(_, r)| *r)
     };
 
+    // The signer's authority = their PARENT role. A member absent from the parent
+    // (brand new) has no prior authority and cannot mint owners/admins. This is
+    // judged BEFORE the loop and never reads the post-change `signer.role`.
+    let signer_parent = parent_role(signer.member_id.as_str());
+    let signer_may_manage_owners = signer_parent.map_or(false, |r| r.can_manage_owners());
+
     for m in &new_members.members {
         if !is_privileged(m.role) {
             continue;
@@ -4592,12 +4606,14 @@ fn enforce_owner_only_elevation(
         if parent_role(m.member_id.as_str()) == Some(m.role) {
             continue; // unchanged role — not an introduction or elevation
         }
-        // A new owner/admin, or a member elevated to owner/admin → owner-only.
-        if !signer.role.can_manage_owners() {
+        // A new owner/admin, or a member elevated to owner/admin → owner-only,
+        // judged by the signer's PRE-commit (parent) authority — never the
+        // post-change `signer.role`.
+        if !signer_may_manage_owners {
             eprintln!(
-                "REJECT: org commit {commit} — member '{}' (role {:?}) may not introduce or \
+                "REJECT: org commit {commit} — member '{}' (parent role {:?}) may not introduce or \
                  elevate owner/admin '{}' to {:?}; only an owner may",
-                signer.display_name, signer.role, m.display_name, m.role
+                signer.display_name, signer_parent, m.display_name, m.role
             );
             std::process::exit(1);
         }

docs/superpowers/specs/2026-06-06-relicario-enterprise-org-vault-design.md

@@ -271,7 +271,7 @@ Parses `git log` (record separator `%x1e`, field separator `%x1f` to survive mul
 
 1. **Verifies the signature** by building a temporary `allowed_signers` from `members.json` ed25519 keys, injecting `gpg.ssh.allowedSignersFile` via `GIT_CONFIG_*`, running `git verify-commit --raw`, and parsing the `SHA256:` fingerprint from stderr — the same mechanism the existing `verify-commit` uses. A commit with no good signature, or whose signer is not a current member, is rejected. (Bare `git %GF` is **not** used — it returns empty without an allowed-signers file.)
 2. **Authorizes the change** by inspecting `git diff-tree` paths:
-   - `members.json` / `collections.json` / `org.json` → signer must be owner/admin; a `member-role-change` granting owner/admin must be signed by an owner.
+   - `members.json` / `collections.json` / `org.json` → signer must be owner/admin; a `member-role-change` granting owner/admin must be signed by an owner. The signer's authority here is judged on their role in the **parent** commit (their pre-change role), never the post-change role carried in the commit under verification — otherwise an Admin could self-promote to Owner in one commit and have the gate read the already-elevated role and self-authorize. A signer absent from the parent has no prior authority and is rejected. (Genesis is the sole exception — see §4 below.)
    - `items/<slug>/<id>.enc` → `<slug>` must be in the signing member's grants.
 3. **Validates schema** — `schema_version` must not decrease for any of the three JSON files (compared against `{commit}^:<file>`), and `members.json`/`collections.json` must pass `validate()`.
 4. **Handles genesis and merges** — the root commit (no parent) is the org-init genesis: it is allowed if signed by the sole owner it introduces. Merge commits are rejected (org history is linear) to avoid first-parent-only diff blind spots.