refactor(cli): shared encrypt_document_file helper (DRY org/personal Document build; zeroize source plaintext)

Document the attachments/<slug>/<item-id>/<att-id>.enc layout (exactly 3
segments, slug-authorized by the pre-receive hook, never decrypted
server-side) and DEFAULT_ORG_ATTACHMENT_MAX_BYTES = 10 MiB, citing
org_session.rs:24 and the mirrored personal default settings.rs:116.

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

@@ -3,7 +3,7 @@
 //! (`commands/org.rs`). Centralizing it keeps the two surfaces from drifting.
 
 use std::collections::HashMap;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 
 use anyhow::{Context, Result};
 use zeroize::Zeroizing;
@@ -255,23 +255,39 @@ pub(crate) fn build_totp(
     })))
 }
 
+/// Read a file and encrypt it as an attachment under `key`, deriving its display
+/// metadata. The plaintext is held in a `Zeroizing` buffer so it is wiped after
+/// encryption. Returns the encrypted blob plus (filename, mime_type, size).
+pub(crate) fn encrypt_document_file(
+    path: &Path,
+    key: &Zeroizing<[u8; 32]>,
+    max_bytes: u64,
+) -> Result<(EncryptedAttachment, String, String, u64)> {
+    use relicario_core::encrypt_attachment;
+    let bytes = Zeroizing::new(
+        std::fs::read(path).with_context(|| format!("failed to read {}", path.display()))?,
+    );
+    let enc = encrypt_attachment(&bytes, key, max_bytes)?;
+    let filename = path
+        .file_name()
+        .ok_or_else(|| anyhow::anyhow!("file path has no filename: {}", path.display()))?
+        .to_string_lossy()
+        .into_owned();
+    let mime_type = crate::parse::guess_mime(&filename);
+    Ok((enc, filename, mime_type, bytes.len() as u64))
+}
+
 pub(crate) fn build_document(
     title: String, file: PathBuf, key: &Zeroizing<[u8; 32]>, max_bytes: u64,
 ) -> Result<(Item, EncryptedAttachment)> {
     use relicario_core::item_types::DocumentCore;
-    use relicario_core::{encrypt_attachment, AttachmentRef};
-    let bytes = std::fs::read(&file).with_context(|| format!("failed to read {}", file.display()))?;
-    let enc = encrypt_attachment(&bytes, key, max_bytes)?;
-    let filename = file.file_name()
-        .ok_or_else(|| anyhow::anyhow!("file path has no filename: {}", file.display()))?
-        .to_string_lossy().into_owned();
-    let mime_type = crate::parse::guess_mime(&filename);
-    let primary_attachment = enc.id.clone();
+    use relicario_core::AttachmentRef;
+    let (enc, filename, mime_type, size) = encrypt_document_file(&file, key, max_bytes)?;
     let mut item = Item::new(title, ItemCore::Document(DocumentCore {
-        filename: filename.clone(), mime_type: mime_type.clone(), primary_attachment: primary_attachment.clone(),
+        filename: filename.clone(), mime_type: mime_type.clone(), primary_attachment: enc.id.clone(),
     }));
     item.attachments.push(AttachmentRef {
-        id: primary_attachment, filename, mime_type, size: bytes.len() as u64, created: item.created,
+        id: enc.id.clone(), filename, mime_type, size, created: item.created,
     });
     Ok((item, enc))
 }

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

@@ -793,7 +793,7 @@ pub enum OrgAddKind {
         digits: u8,
         algorithm: String,
     },
-    // Document is added later by Dev-C.
+    Document { title: String, file: std::path::PathBuf },
 }
 
 fn build_org_item(kind: OrgAddKind) -> Result<Item> {
@@ -816,6 +816,7 @@ fn build_org_item(kind: OrgAddKind) -> Result<Item> {
         OrgAddKind::Totp { title, issuer, label, secret, secret_stdin, period, digits, algorithm } => {
             ib::build_totp(title, issuer, label, secret, secret_stdin, period, digits, &algorithm)
         }
+        OrgAddKind::Document { .. } => unreachable!("Document handled in run_add before build_org_item"),
     }
 }
 
@@ -833,7 +834,16 @@ pub fn run_add(dir: &Path, collection: &str, kind: OrgAddKind, tags: Vec<String>
     // …and the caller must hold a grant for it.
     UnlockedOrgVault::ensure_grant(&caller, collection)?;
 
-    let mut item = build_org_item(kind)?;
+    // Build the item; Document additionally yields an encrypted attachment to persist.
+    let (mut item, attachment_rel): (relicario_core::Item, Option<String>) = match kind {
+        OrgAddKind::Document { title, file } => {
+            let (item, enc) = ib::build_document(
+                title, file, vault.key(), crate::org_session::DEFAULT_ORG_ATTACHMENT_MAX_BYTES)?;
+            let rel = vault.save_attachment(collection, &item.id, &enc)?;
+            (item, Some(rel))
+        }
+        other => (build_org_item(other)?, None),
+    };
     item.tags = tags;
     let item_rel = vault.save_item(collection, &item)?;
 
@@ -855,11 +865,11 @@ pub fn run_add(dir: &Path, collection: &str, kind: OrgAddKind, tags: Vec<String>
         collection,
         item.id.as_str()
     );
-    crate::org_session::org_git_run(
-        &vault.root,
-        &["add", &item_rel, "manifest.enc"],
-        "org add: git add",
-    )?;
+    let mut add_args: Vec<&str> = vec!["add", &item_rel, "manifest.enc"];
+    if let Some(ref rel) = attachment_rel {
+        add_args.insert(1, rel);
+    }
+    crate::org_session::org_git_run(&vault.root, &add_args, "org add: git add")?;
     crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "org add: git commit")?;
 
     println!("Added {} ({}) to `{}`", item.title, item.id.as_str(), collection);
@@ -991,7 +1001,7 @@ fn resolve_org_query<'a>(
     }
 }
 
-pub fn run_edit(dir: &Path, query: &str, totp_qr: Option<std::path::PathBuf>) -> Result<()> {
+pub fn run_edit(dir: &Path, query: &str, totp_qr: Option<std::path::PathBuf>, file: Option<std::path::PathBuf>) -> Result<()> {
     use relicario_core::time::now_unix;
     use relicario_core::ItemCore;
 
@@ -1005,6 +1015,9 @@ pub fn run_edit(dir: &Path, query: &str, totp_qr: Option<std::path::PathBuf>) ->
     crate::org_session::UnlockedOrgVault::ensure_grant(&caller, &collection)?;
 
     let mut item = vault.load_item(&collection, &id)?;
+    if file.is_some() && !matches!(item.core, ItemCore::Document(_)) {
+        anyhow::bail!("--file is only valid when editing a Document item");
+    }
     eprintln!(
         "Editing: {} ({}) — leave a prompt blank to keep the current value.",
         item.title,
@@ -1015,15 +1028,40 @@ pub fn run_edit(dir: &Path, query: &str, totp_qr: Option<std::path::PathBuf>) ->
     }
 
     let history = &mut item.field_history;
+    let mut doc_attachment_rel: Option<String> = None;
+    let mut new_doc_attachments: Option<Vec<relicario_core::AttachmentRef>> = None;
     match &mut item.core {
         ItemCore::Login(l) => ib::edit_login(l, history, totp_qr)?,
         ItemCore::SecureNote(n) => ib::edit_secure_note(n, history)?,
         ItemCore::Identity(i) => ib::edit_identity(i)?,
         ItemCore::Card(c) => ib::edit_card(c, history)?,
         ItemCore::Key(k) => ib::edit_key(k, history)?,
-        ItemCore::Document(_) => ib::edit_document_message(),
+        ItemCore::Document(d) => {
+            if let Some(path) = &file {
+                let (enc, filename, mime_type, size) = ib::encrypt_document_file(
+                    path, vault.key(), crate::org_session::DEFAULT_ORG_ATTACHMENT_MAX_BYTES)?;
+                vault.remove_item_attachments(&collection, &id)?;
+                let rel = vault.save_attachment(&collection, &id, &enc)?;
+                d.filename = filename.clone();
+                d.mime_type = mime_type.clone();
+                d.primary_attachment = enc.id.clone();
+                new_doc_attachments = Some(vec![relicario_core::AttachmentRef {
+                    id: enc.id,
+                    filename,
+                    mime_type,
+                    size,
+                    created: now_unix(),
+                }]);
+                doc_attachment_rel = Some(rel);
+            } else {
+                ib::edit_document_message();
+            }
+        }
         ItemCore::Totp(t) => ib::edit_totp(t, history)?,
     }
+    if let Some(atts) = new_doc_attachments {
+        item.attachments = atts;
+    }
 
     item.modified = now_unix();
     let item_rel = vault.save_item(&collection, &item)?;
@@ -1043,7 +1081,13 @@ pub fn run_edit(dir: &Path, query: &str, totp_qr: Option<std::path::PathBuf>) ->
         collection,
         item.id.as_str()
     );
-    crate::org_session::org_git_run(&vault.root, &["add", &item_rel, "manifest.enc"], "org edit: git add")?;
+    let mut add_args: Vec<&str> = vec!["add", &item_rel, "manifest.enc"];
+    let att_dir_rel;
+    if doc_attachment_rel.is_some() {
+        att_dir_rel = format!("attachments/{}/{}", collection, id.as_str());
+        add_args.push(&att_dir_rel);
+    }
+    crate::org_session::org_git_run(&vault.root, &add_args, "org edit: git add")?;
     crate::org_session::org_git_run(&vault.root, &["commit", "-m", &commit_msg], "org edit: git commit")?;
     println!("Updated {} ({}) in `{}`", item.title, item.id.as_str(), collection);
     Ok(())
@@ -1119,12 +1163,14 @@ pub fn run_purge(dir: &Path, query: &str) -> Result<()> {
 
     // Remove the blob from disk, drop the manifest entry, stage with git rm.
     vault.remove_item(&collection, &id)?;
+    vault.remove_item_attachments(&collection, &id)?;
     let mut manifest = vault.load_manifest()?;
     manifest.entries.retain(|e| e.id != id);
     vault.save_manifest(&manifest)?;
 
     let item_rel = format!("items/{}/{}.enc", collection, id.as_str());
-    crate::helpers::git_rm(&vault.root, &[item_rel], "org purge: git rm")?;
+    let att_dir_rel = format!("attachments/{}/{}", collection, id.as_str());
+    crate::helpers::git_rm(&vault.root, &[item_rel, att_dir_rel], "org purge: git rm")?;
     crate::org_session::org_git_run(&vault.root, &["add", "manifest.enc"], "org purge: git add manifest")?;
 
     let commit_msg = format!(

crates/relicario-cli/src/main.rs

@@ -541,6 +541,8 @@ pub(crate) enum OrgCommands {
         query: String,
         /// Replace the login TOTP secret from a QR image.
         #[arg(long)] totp_qr: Option<std::path::PathBuf>,
+        /// Replace a Document item's attachment file.
+        #[arg(long)] file: Option<std::path::PathBuf>,
     },
     /// Soft-delete an org item (reversible via `org restore`).
     Rm { query: String },
@@ -614,6 +616,13 @@ pub(crate) enum OrgAddKind {
         #[arg(long, value_delimiter = ',')] tags: Vec<String>,
         #[arg(long)] secret_stdin: bool,
     },
+    /// A document (file payload encrypted into a collection-scoped attachment).
+    Document {
+        #[arg(long)] collection: String,
+        #[arg(long)] title: String,
+        #[arg(long)] file: std::path::PathBuf,
+        #[arg(long, value_delimiter = ',')] tags: Vec<String>,
+    },
 }
 
 fn main() -> Result<()> {
@@ -737,6 +746,11 @@ fn main() -> Result<()> {
                             commands::org::OrgAddKind::Totp { title, issuer, label, secret, secret_stdin, period, digits, algorithm },
                             tags,
                         ),
+                        OrgAddKind::Document { collection, title, file, tags } => (
+                            collection,
+                            commands::org::OrgAddKind::Document { title, file },
+                            tags,
+                        ),
                     };
                     commands::org::run_add(&d, &collection, add_kind, tags)?;
                 }
@@ -748,9 +762,9 @@ fn main() -> Result<()> {
                     let d = crate::org_session::org_dir(dir_path)?;
                     commands::org::run_list(&d, trashed)?;
                 }
-                OrgCommands::Edit { query, totp_qr } => {
+                OrgCommands::Edit { query, totp_qr, file } => {
                     let d = crate::org_session::org_dir(dir_path)?;
-                    commands::org::run_edit(&d, &query, totp_qr)?;
+                    commands::org::run_edit(&d, &query, totp_qr, file)?;
                 }
                 OrgCommands::Rm { query } => {
                     let d = crate::org_session::org_dir(dir_path)?;

crates/relicario-cli/src/org_session.rs

@@ -9,9 +9,16 @@ use zeroize::Zeroizing;
 
 use relicario_core::{
     decrypt_item, decrypt_org_manifest, encrypt_item, encrypt_org_manifest,
-    Item, ItemId, MemberId, OrgCollections, OrgManifest, OrgMember, OrgMembers, OrgMeta,
+    AttachmentId, EncryptedAttachment, Item, ItemId, MemberId, OrgCollections, OrgManifest,
+    OrgMember, OrgMembers, OrgMeta,
 };
 
+/// Default per-attachment cap for org vaults. Org vaults have no settings.enc,
+/// so this mirrors the personal-vault default
+/// `AttachmentCaps::per_attachment_max_bytes` at
+/// crates/relicario-core/src/settings.rs:116.
+pub const DEFAULT_ORG_ATTACHMENT_MAX_BYTES: u64 = 10 * 1024 * 1024;
+
 pub struct UnlockedOrgVault {
     pub root: PathBuf,
     pub org_key: Zeroizing<[u8; 32]>,
@@ -115,6 +122,40 @@ impl UnlockedOrgVault {
         }
     }
 
+    pub fn attachment_path(&self, collection_slug: &str, item_id: &ItemId, att_id: &AttachmentId) -> PathBuf {
+        self.root.join("attachments").join(collection_slug)
+            .join(item_id.as_str()).join(format!("{}.enc", att_id.as_str()))
+    }
+
+    /// Encrypt-already-done blob: persist it and return the repo-relative path for git staging.
+    pub fn save_attachment(&self, collection_slug: &str, item_id: &ItemId, enc: &EncryptedAttachment) -> Result<String> {
+        let path = self.attachment_path(collection_slug, item_id, &enc.id);
+        if let Some(parent) = path.parent() {
+            fs::create_dir_all(parent).with_context(|| format!("create {}", parent.display()))?;
+        }
+        atomic_write(&path, &enc.bytes)?;
+        Ok(format!("attachments/{}/{}/{}.enc", collection_slug, item_id.as_str(), enc.id.as_str()))
+    }
+
+    // Retained for a future `org document read/extract` command (mirrors `org_meta_path` convention).
+    #[allow(dead_code)]
+    pub fn load_attachment(&self, collection_slug: &str, item_id: &ItemId, att_id: &AttachmentId) -> Result<Zeroizing<Vec<u8>>> {
+        let path = self.attachment_path(collection_slug, item_id, att_id);
+        let bytes = fs::read(&path).with_context(|| format!("read attachment {}", path.display()))?;
+        Ok(relicario_core::decrypt_attachment(&bytes, &self.org_key)?)
+    }
+
+    /// Remove an item's whole attachment directory. Missing dir is NOT an error
+    /// (mirrors `remove_item`'s NotFound-tolerant behavior, for partial-write recovery).
+    pub fn remove_item_attachments(&self, collection_slug: &str, item_id: &ItemId) -> Result<()> {
+        let dir = self.root.join("attachments").join(collection_slug).join(item_id.as_str());
+        match fs::remove_dir_all(&dir) {
+            Ok(()) => Ok(()),
+            Err(e) if e.kind() == std::io::ErrorKind::NotFound => Ok(()),
+            Err(e) => Err(anyhow::Error::from(e).context(format!("remove {}", dir.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<()> {
@@ -292,6 +333,22 @@ mod tests {
         assert_eq!(loaded.entries.len(), 1);
     }
 
+    #[test]
+    fn attachment_round_trip_collection_scoped() {
+        use relicario_core::encrypt_attachment;
+        let key = Zeroizing::new([7u8; 32]);
+        let (dir, vault) = make_vault(key);
+        let _ = dir; // keep tempdir alive
+        let item_id = ItemId::new();
+        let enc = encrypt_attachment(b"hello world", &vault.org_key, DEFAULT_ORG_ATTACHMENT_MAX_BYTES).unwrap();
+        let rel = vault.save_attachment("eng", &item_id, &enc).unwrap();
+        assert_eq!(rel, format!("attachments/eng/{}/{}.enc", item_id.as_str(), enc.id.as_str()));
+        let got = vault.load_attachment("eng", &item_id, &enc.id).unwrap();
+        assert_eq!(got.as_slice(), b"hello world");
+        vault.remove_item_attachments("eng", &item_id).unwrap();
+        assert!(vault.load_attachment("eng", &item_id, &enc.id).is_err());
+    }
+
     #[test]
     fn save_and_load_members() {
         let key = Zeroizing::new([0u8; 32]);

crates/relicario-cli/tests/org_items.rs

@@ -456,3 +456,132 @@ fn org_edit_key_replaces_material_and_reveals_with_show() {
     assert!(shown.contains("NEW-MATERIAL-bbbb"), "replaced material not revealed with --show: {shown}");
     assert!(!shown.contains("OLD-MATERIAL"), "old material still present after replace: {shown}");
 }
+
+// --- v0.8.1 org Document tests -----------------------------------------------
+
+/// `git status --porcelain` output for the org repo (trimmed). Empty-of-`attachments/`
+/// proves every attachment add/remove was staged into the signed commit.
+fn git_porcelain(repo: &str) -> String {
+    let out = std::process::Command::new("git")
+        .args(["-C", repo, "status", "--porcelain"])
+        .output()
+        .unwrap();
+    String::from_utf8_lossy(&out.stdout).trim().to_string()
+}
+
+#[test]
+fn org_add_document_stores_collection_scoped_attachment() {
+    let f = OrgFixture::new();
+    f.create_collection_and_grant("eng");
+    let srcdir = TempDir::new().unwrap();
+    let src = srcdir.path().join("note.txt");
+    std::fs::write(&src, b"secret memo").unwrap();
+
+    let out = f.run(&["org", "add", "document", "--collection", "eng",
+                      "--title", "Q3 Memo", "--file", src.to_str().unwrap()]);
+    assert!(out.status.success(), "add doc: {}", String::from_utf8_lossy(&out.stderr));
+
+    // Encrypted blob at attachments/eng/<item-id>/<att-id>.enc (3 segments).
+    let att_eng = f.vault_path().join("attachments").join("eng");
+    assert!(att_eng.exists(), "attachment dir missing");
+    let item_dirs: Vec<_> = std::fs::read_dir(&att_eng).unwrap().map(|e| e.unwrap().path()).collect();
+    assert_eq!(item_dirs.len(), 1, "expected exactly one item attachment dir");
+    let blobs: Vec<_> = std::fs::read_dir(&item_dirs[0]).unwrap().map(|e| e.unwrap().path()).collect();
+    assert_eq!(blobs.len(), 1, "expected exactly one attachment blob");
+    assert_eq!(blobs[0].extension().and_then(|e| e.to_str()), Some("enc"), "blob must be .enc");
+
+    let got = f.run(&["org", "get", "Q3 Memo"]);
+    let stdout = String::from_utf8_lossy(&got.stdout);
+    assert!(stdout.contains("Filename: note.txt"), "get missing filename: {stdout}");
+    // Staging proof: nothing attachment-related left uncommitted.
+    assert!(!git_porcelain(f.vault_str()).contains("attachments/"), "unstaged attachment after add");
+}
+
+#[test]
+fn org_purge_document_removes_attachment_dir() {
+    let f = OrgFixture::new();
+    f.create_collection_and_grant("eng");
+    let srcdir = TempDir::new().unwrap();
+    let src = srcdir.path().join("d.bin");
+    std::fs::write(&src, b"bytes").unwrap();
+    assert!(f.run(&["org", "add", "document", "--collection", "eng",
+                    "--title", "Doc", "--file", src.to_str().unwrap()]).status.success());
+
+    let att_eng = f.vault_path().join("attachments").join("eng");
+    assert!(std::fs::read_dir(&att_eng).unwrap().next().is_some(), "attachment must exist after add");
+
+    assert!(f.run(&["org", "rm", "Doc"]).status.success(), "rm");
+    let out = f.run(&["org", "purge", "Doc"]);
+    assert!(out.status.success(), "purge: {}", String::from_utf8_lossy(&out.stderr));
+
+    let empty = !att_eng.exists() || std::fs::read_dir(&att_eng).unwrap().next().is_none();
+    assert!(empty, "attachment dir should be gone after purge");
+    assert!(!git_porcelain(f.vault_str()).contains("attachments/"), "unstaged attachment removal after purge");
+}
+
+#[test]
+fn org_edit_document_replaces_attachment_and_stages_cleanly() {
+    let f = OrgFixture::new();
+    f.create_collection_and_grant("eng");
+    let srcdir = TempDir::new().unwrap();
+    let a = srcdir.path().join("a.txt");
+    std::fs::write(&a, b"version A").unwrap();
+    assert!(f.run(&["org", "add", "document", "--collection", "eng",
+                    "--title", "Spec", "--file", a.to_str().unwrap()]).status.success());
+
+    let b = srcdir.path().join("b.md");
+    std::fs::write(&b, b"version B has different content").unwrap();
+    let out = f.run(&["org", "edit", "Spec", "--file", b.to_str().unwrap()]);
+    assert!(out.status.success(), "edit --file: {}", String::from_utf8_lossy(&out.stderr));
+
+    let got = String::from_utf8_lossy(&f.run(&["org", "get", "Spec"]).stdout).to_string();
+    assert!(got.contains("Filename: b.md"), "get should show new filename: {got}");
+    assert!(!got.contains("a.txt"), "old filename should be gone: {got}");
+
+    // Old blob replaced, not accumulated: exactly one blob remains.
+    let att_eng = f.vault_path().join("attachments").join("eng");
+    let item_dirs: Vec<_> = std::fs::read_dir(&att_eng).unwrap().map(|e| e.unwrap().path()).collect();
+    assert_eq!(item_dirs.len(), 1, "one item attachment dir");
+    let blobs = std::fs::read_dir(&item_dirs[0]).unwrap().count();
+    assert_eq!(blobs, 1, "old blob must be replaced, not accumulated");
+
+    // The key staging proof: no orphaned old blob / unstaged new blob.
+    assert!(!git_porcelain(f.vault_str()).contains("attachments/"),
+            "edit-replace left attachment changes unstaged (incomplete git add)");
+}
+
+#[test]
+fn org_edit_file_on_non_document_is_rejected() {
+    let f = OrgFixture::new();
+    f.create_collection_and_grant("eng");
+    assert!(f.run(&["org", "add", "login", "--collection", "eng",
+                    "--title", "Site", "--password", "p"]).status.success());
+    let srcdir = TempDir::new().unwrap();
+    let x = srcdir.path().join("x.txt");
+    std::fs::write(&x, b"nope").unwrap();
+
+    let out = f.run(&["org", "edit", "Site", "--file", x.to_str().unwrap()]);
+    assert!(!out.status.success(), "--file on a Login must be rejected");
+    let stderr = String::from_utf8_lossy(&out.stderr);
+    assert!(stderr.contains("--file is only valid"), "unexpected error: {stderr}");
+}
+
+#[test]
+fn org_add_document_into_ungranted_collection_is_denied() {
+    let f = OrgFixture::new();
+    // Collection exists but the owner is NOT granted.
+    assert!(f.run(&["org", "create-collection", "secret", "--name", "Secret"]).status.success(),
+            "create-collection");
+    let srcdir = TempDir::new().unwrap();
+    let src = srcdir.path().join("f.txt");
+    std::fs::write(&src, b"data").unwrap();
+
+    let out = f.run(&["org", "add", "document", "--collection", "secret",
+                      "--title", "X", "--file", src.to_str().unwrap()]);
+    assert!(!out.status.success(), "ungranted document add must fail");
+    let stderr = String::from_utf8_lossy(&out.stderr);
+    assert!(stderr.contains("access denied") || stderr.contains("grant"), "unexpected error: {stderr}");
+    // Grant is enforced before any attachment is written.
+    assert!(!f.vault_path().join("attachments").join("secret").exists(),
+            "no attachment dir should exist on a denied add");
+}

docs/FORMATS.md

@@ -82,6 +82,7 @@ collections.json                      # collection definitions
 keys/<member-id>.enc                  # org master key wrapped to that member's device key
 manifest.enc                          # OrgManifest (schema_version 1, per-member-filtered)
 items/<collection-slug>/<item-id>.enc # collection-scoped item blobs
+attachments/<collection-slug>/<item-id>/<att-id>.enc # Document attachment blobs (collection-scoped)
 ```
 
 ### `org.json` — OrgMeta
@@ -123,7 +124,13 @@ Standard `.enc` blob (see **Encrypted blob** above), encrypted under the org mas
 
 These blobs are written and read by the `relicario org` item commands (`org add` / `get` / `list` / `edit` / `rm` / `restore` / `purge`), all collection-scoped and grant-enforced. `org add` currently creates Login / SecureNote / Identity items; `get` / `list` display any item type present.
 
-**TODO (extension follow-up):** extension UI for browsing and editing org vault items. **Deferred:** `org add` / `edit` parity for Card / Key / Document / Totp item types.
+### `attachments/<collection-slug>/<item-id>/<att-id>.enc`
+
+Standard `.enc` blob (see **Encrypted blob** above), encrypted under the org master key — the encrypted file payload of a Document item. As with item blobs, the blob does **not** name its collection; the leading `<collection-slug>` path segment carries it, so the pre-receive hook (`relicario-server`, `classify_path`) authorizes the write by slug without decrypting — reusing the same grant + slug-existence check as the `items/` branch. The path is **exactly three segments** after `attachments/` (`<collection-slug>/<item-id>/<att-id>.enc`); the hook rejects any other shape (segment-count and `.`-free slug guards). `<att-id>` is the content-addressed `AttachmentId` (see **Item IDs and Field IDs** below).
+
+Per-attachment size is capped at `DEFAULT_ORG_ATTACHMENT_MAX_BYTES = 10 * 1024 * 1024` (10 MiB) (`org_session.rs:24`), mirroring the personal-vault default `AttachmentCaps::per_attachment_max_bytes` (`settings.rs:116`). Org vaults have no `settings.enc`, so this cap is a fixed default rather than per-org configurable. Blobs are persisted / read / removed by `UnlockedOrgVault::save_attachment` / `load_attachment` / `remove_item_attachments` (`org_session.rs:137`, `:147`, `:156`). The storage primitives back the org **Document** item type; the `org add document` / Document-edit commands that produce these blobs land in v0.8.1 (see the item-type-parity note below).
+
+**TODO (extension follow-up):** extension UI for browsing and editing org vault items. **Deferred:** `org add` / `edit` parity for Card / Key / Document / Totp item types (landing in v0.8.1; Document file payloads use the attachment layout above).
 
 ## Item IDs and Field IDs