chore: cite docs/BUGS.md and drop references to notes outside the repo

66 comments cited `bugs.md B<n>`, the ledger's old name; they now say
`docs/BUGS.md B<n>`, and every cited number has an entry. About 90 more
cited offline.md, devices.md, features.md, mount-architecture.md,
plan.md and improvements.md, planning notes that were never in the
repository. Those citations are removed; the comments keep their text.

crates/pdfs-core/src/cache.rs

@@ -91,7 +91,7 @@ const TOUCH_FLUSH_AT: usize = 256;
 ///
 /// Public because it is the *contract* a block has to satisfy, not a detail of
 /// this cache: the network read path validates against it too, so a block that
-/// comes back short is refused before it can truncate a file (bugs.md B84).
+/// comes back short is refused before it can truncate a file (`docs/BUGS.md` B84).
 pub fn block_len(size: u64, idx: u64) -> u64 {
     let start = idx.saturating_mul(BLOCK_SIZE);
     size.saturating_sub(start).min(BLOCK_SIZE)
@@ -311,8 +311,7 @@ struct PinFile {
     pins: BTreeMap<String, Pin>,
 }
 
-/// What a staged file actually contains, written beside it as `<name>.json`
+/// What a staged file actually contains, written beside it as `<name>.json`.
-/// (offline.md Phase 2).
 ///
 /// A staged file is **not** necessarily valid whole-file content, and that is
 /// the whole reason this exists. A partial overwrite commits by filling the
@@ -439,9 +438,9 @@ pub struct ContentCache {
     /// Subdirectory for write-handle scratch files (disk-backed write buffers).
     /// Emptied on open so a crashed run leaves no orphans.
     scratch_dir: PathBuf,
-    /// Subdirectory holding the bytes of writes that have not been uploaded yet
+    /// Subdirectory holding the bytes of writes that have not been uploaded yet.
-    /// (offline.md Phase 2/3) — every released write passes through here, since
+    /// Every released write passes through here, since the upload is a queued
-    /// the upload is a queued op performed later. Unlike `scratch_dir` this is
+    /// op performed later. Unlike `scratch_dir` this is
     /// **never** emptied on open: these are the only copy of content the user
     /// authored, and the whole point is that they outlive the daemon.
     staging_dir: PathBuf,
@@ -476,7 +475,7 @@ pub struct ContentCache {
     thumb_bytes: AtomicU64,
     /// Unified metadata DB. Its `cache_entries` table is the LRU index: every
     /// store/read/evict updates it, and the budget enforcers query it instead of
-    /// scanning the cache directories (plan.md P4).
+    /// scanning the cache directories.
     db: Arc<Db>,
     /// LRU touches not yet written to `cache_entries`, keyed by cache key.
     ///
@@ -989,7 +988,7 @@ impl ContentCache {
     /// a miss ([`cached_block`](Self::cached_block) checks), so a bad block
     /// cannot escape this cache even though this does not check. Validating a
     /// block is the *reader's* job, at the point it is fetched — see
-    /// `Core::read_block` (bugs.md B84).
+    /// `Core::read_block` (`docs/BUGS.md` B84).
     pub fn store_block(
         &self,
         uid: &NodeUid,
@@ -1491,9 +1490,8 @@ impl ContentCache {
     /// This is what makes a write survive its upload: the caller is releasing a
     /// write handle and would otherwise delete the file, so until the bytes are
     /// on the remote, staging holds the only copy. Every dirty handle goes
-    /// through here — the upload is a queued op performed later (offline.md
+    /// through here — the upload is a queued op performed later, and a staged
-    /// Phase 3), and a staged file is also what a human can recover from if the
+    /// file is also what a human can recover from if the queue never drains.
-    /// queue never drains.
     ///
     /// Falls back to a copy when the rename crosses a filesystem boundary; a
     /// failure here means we could not save the bytes at all, so it is reported
@@ -2707,7 +2705,7 @@ mod tests {
     }
 
     /// The geometry the whole read path validates against, here and over the
-    /// network (bugs.md B84): full blocks, then whatever is left.
+    /// network (`docs/BUGS.md` B84): full blocks, then whatever is left.
     #[test]
     fn block_len_is_full_blocks_then_the_remainder() {
         let size = BLOCK_SIZE * 2 + 17;
@@ -2787,7 +2785,7 @@ mod tests {
     /// A cached block is addressed by the range it covers, not by its index
     /// alone. Re-planning a file onto its real geometry must therefore miss the
     /// blocks the uniform fallback cached, rather than serve their bytes at the
-    /// wrong offset (bugs.md B85).
+    /// wrong offset (`docs/BUGS.md` B85).
     #[test]
     fn a_cached_block_is_not_served_to_a_different_geometry() {
         let (c, _d) = cache();
@@ -2854,7 +2852,7 @@ mod tests {
 
     /// A block of the wrong length cannot escape the cache even though the
     /// store does not check: the read validates it and reports a miss, so the
-    /// next read refetches rather than serving a hole (bugs.md B84).
+    /// next read refetches rather than serving a hole (`docs/BUGS.md` B84).
     #[test]
     fn a_block_of_the_wrong_length_reads_as_a_miss() {
         let (c, _d) = cache();
@@ -2919,7 +2917,7 @@ mod tests {
         );
     }
 
-    /// A failed upload must never cost the user their bytes (offline.md Phase 2):
+    /// A failed upload must never cost the user their bytes:
     /// the scratch file moves to staging intact, and staging survives a reopen
     /// the way scratch deliberately does not.
     #[test]

crates/pdfs-core/src/config.rs

@@ -432,7 +432,7 @@ impl AppDirs {
     /// typical umask makes them `0755`. Until this was fixed, the only thing
     /// keeping another local user out was `~/.cache` and `~/.local/state`
     /// happening to be `0700`, which is a convention of the user's system and
-    /// not something this client established (bugs.md B6).
+    /// not something this client established (`docs/BUGS.md` B6).
     ///
     /// Applied on every start, not just at creation: a directory that already
     /// exists with a permissive mode — restored from a backup that flattened
@@ -483,7 +483,7 @@ fn restrict_dir(dir: &Path) -> Result<()> {
 /// session — enumerate, read, upload, trash, share — without presenting any
 /// credential, since the daemon already holds one. It is an authority boundary,
 /// not merely private data, and `UnixListener::bind` applies the umask like any
-/// other file (bugs.md B6).
+/// other file (`docs/BUGS.md` B6).
 ///
 /// There is a window between `bind` and this call during which the socket
 /// carries the umask's mode. It is closed in practice by the containing
@@ -504,7 +504,7 @@ mod tests {
         std::fs::metadata(p).unwrap().permissions().mode() & 0o777
     }
 
-    /// bugs.md B6. A permissive mode here is not a cosmetic problem: these
+    /// `docs/BUGS.md` B6. A permissive mode here is not a cosmetic problem: these
     /// directories hold decrypted content, a plaintext index of every node name,
     /// and the control socket that commands the daemon's session.
     #[test]

crates/pdfs-core/src/control.rs

@@ -443,11 +443,11 @@ pub enum Request {
     DeleteDevice { uid: String },
     /// Adopt an existing device as this machine's, pinning its uid in
     /// `config.json` so a hostname change or reinstall re-attaches to it instead
-    /// of registering a duplicate (features.md 5.1). `uid: None` clears the pin.
+    /// of registering a duplicate. `uid: None` clears the pin.
     /// Replies with [`Response::Ok`].
     AdoptDevice { uid: Option<String> },
 
-    // ---- device folder sync (devices.md) ----------------------------------
+    // ---- device folder sync ----------------------------------
     /// Add a local folder to this machine's device, uploading its tree and
     /// registering the device on first use. Replies with [`Response::Ok`].
     AddSyncFolder { local_path: String },
@@ -496,7 +496,7 @@ pub enum Request {
     /// [`Response::Ok`].
     ResolveConflict { path: String, keep: ConflictKeep },
     /// List the folders under this machine's device that can be synced here,
-    /// each with a proposed local path (features.md 5.2). Replies with
+    /// each with a proposed local path. Replies with
     /// [`Response::RestorableFolders`].
     ListRestorableFolders,
     /// Attach the given remote device folders to local paths and sync them down.
@@ -1903,17 +1903,17 @@ pub enum Response {
         /// The pin registry.
         pins: Vec<Pin>,
         /// False when the daemon is serving the cached tree because the API is
-        /// unreachable (offline.md Phase 1). Cached and pinned content still
+        /// unreachable. Cached and pinned content still
         /// reads; anything else fails until the network is back.
         #[serde(default = "default_online")]
         online: bool,
-        /// Writes accepted locally but not yet uploaded (offline.md Phase 3).
+        /// Writes accepted locally but not yet uploaded.
         /// Non-zero means the mount is ahead of the remote — either a copy is
         /// still draining, or it cannot drain because we are offline.
         #[serde(default)]
         pending_uploads: u64,
-        /// Queued mutations that carry no bytes: `mkdir`, `rename`, `trash`
+        /// Queued mutations that carry no bytes: `mkdir`, `rename`, `trash`.
-        /// (offline.md Phase 3b). Counted apart from `pending_uploads` because
+        /// Counted apart from `pending_uploads` because
         /// calling a queued `mkdir` an upload is a lie.
         #[serde(default)]
         pending_changes: u64,

crates/pdfs-core/src/db/maintenance.rs

@@ -1,4 +1,4 @@
-//! Database health reporting and repair (features.md 4.3).
+//! Database health reporting and repair.
 //!
 //! Everything here exists for the case where something has already gone wrong:
 //! a crash mid-write, a full disk, a cache that has grown out of proportion to

crates/pdfs-core/src/db/migrations.rs

@@ -577,7 +577,7 @@ CREATE TABLE trash (
 );
 ";
 
-/// Schema v8: device sync (devices.md). This machine registers as one Proton Drive
+/// Schema v8: device sync. This machine registers as one Proton Drive
 /// **Device** (a share + root folder on the main volume); `device` is a singleton
 /// row cached so we reuse the same device across restarts instead of creating a
 /// new one each run. `sync_folder` is one row per local folder the user added,
@@ -638,8 +638,8 @@ ALTER TABLE sync_folder ADD COLUMN pending_mode TEXT;
 ";
 
 /// Schema v11: writes no longer upload inside the FUSE handler. `release` stages
-/// the bytes and records the intended upload here, and a drain worker performs it
+/// the bytes and records the intended upload here, and a drain worker performs it.
-/// (offline.md Phase 3). The row outlives the process, so a write survives both a
+/// The row outlives the process, so a write survives both a
 /// dead network and a restart.
 ///
 /// `blob_path` points into the content cache's `staging/` dir and `meta_json` is
@@ -666,7 +666,7 @@ CREATE INDEX pending_op_uid ON pending_op(uid);
 
 /// Schema v12: `pending_op` also carries mutations that *create* a node, which a
 /// revision op never had to describe — it always addressed a node the server had
-/// already minted a uid for (offline.md Phase 3b).
+/// already minted a uid for.
 ///
 /// An offline `create`/`mkdir` cannot get a real uid, so the node is invented
 /// locally under a `local~<uuid>` placeholder and the op records where it goes
@@ -1056,7 +1056,7 @@ ALTER TABLE pending_op ADD COLUMN access_deferred_since INTEGER NOT NULL DEFAULT
 /// as the last sync and left the file the same length — a fixed-size record
 /// rewritten, an image re-exported, a database page updated in place — read as
 /// *unchanged* and was never uploaded. The remote copy silently stayed at the
-/// older content until something else about the file moved (bugs.md B25).
+/// older content until something else about the file moved (`docs/BUGS.md` B25).
 ///
 /// Nullable rather than a converted `local_mtime * 1_000_000_000`: the
 /// nanosecond part of an existing baseline is genuinely unknown, and inventing

crates/pdfs-core/src/db/nodes.rs

@@ -568,8 +568,7 @@ impl Db {
     }
 
     /// Load one persisted node back by uid. Used to recover the My Files root
-    /// when the API is unreachable, so the mount can still serve the cached tree
+    /// when the API is unreachable, so the mount can still serve the cached tree.
-    /// (offline.md Phase 1).
     pub fn node_by_uid(&self, uid: &str) -> Result<Option<Node>> {
         let conn = self.read();
         let json: Option<String> = conn

crates/pdfs-core/src/db/ops.rs

@@ -15,7 +15,7 @@ use crate::Result;
 pub const OP_REVISION: &str = "revision";
 
 /// The `kind` of a [`PendingOp`] that creates a file that so far exists only
-/// locally, under a `local:` placeholder uid (offline.md Phase 3b).
+/// locally, under a `local:` placeholder uid.
 ///
 /// The written bytes ride along on the same row rather than as a follow-on
 /// [`OP_REVISION`]: draining the create mints the node's real uid, which would
@@ -29,7 +29,7 @@ pub const OP_CREATE: &str = "create";
 pub const OP_MKDIR: &str = "mkdir";
 
 /// The `kind` of a [`PendingOp`] that gives a node a new name, a new parent, or
-/// both — the queued form of `mv` (offline.md Phase 3b).
+/// both — the queued form of `mv`.
 ///
 /// `parent_uid` and `name` hold the node's *desired end state*, not a delta, so
 /// a second rename simply replaces the row (see [`Db::enqueue_op`]) and the
@@ -55,8 +55,7 @@ pub struct RenameMeta {
     pub original_name: Option<String>,
 }
 
-/// The `kind` of a [`PendingOp`] that trashes a node the server knows about
+/// The `kind` of a [`PendingOp`] that trashes a node the server knows about.
-/// (offline.md Phase 3b).
 ///
 /// A node that only ever existed locally never gets one of these: there is
 /// nothing to trash remotely, so deleting it just drops its queued ops
@@ -311,7 +310,7 @@ pub const PARK_UNTIL: i64 = 8_000_000_000_000;
 pub const PARK_EXPIRY_MS: i64 = 60 * 60 * 1000;
 
 /// A mutation that has been accepted locally but not yet performed against the
-/// API — the durable half of the write-back queue (offline.md Phase 3).
+/// API — the durable half of the write-back queue.
 ///
 /// The daemon answers the FUSE call the moment this row and its staged blob are
 /// on disk, so a `cp` into the mount runs at disk speed and the upload happens
@@ -887,7 +886,7 @@ impl Db {
     /// make — the node is still only a queued intent, and rewriting that intent
     /// *is* the rename. Returns false when the create has already drained, in
     /// which case the node has a real uid and the caller must rename it there
-    /// instead (offline.md Phase 3b).
+    /// instead.
     ///
     /// A create backing off is made due: what it failed on may have been the
     /// name it no longer wants, such as one held by a queued change. A parked

crates/pdfs-core/src/db/sync.rs

@@ -25,8 +25,8 @@ pub struct StoredSyncFolder {
 }
 
 /// One per-file sync baseline row: what a path looked like on both sides at the
-/// last successful sync, so the next reconcile can tell which side changed
+/// last successful sync, so the next reconcile can tell which side changed.
-/// (devices.md Phase 2). `remote_rev`/`remote_hash` hold the remote signature —
+/// `remote_rev`/`remote_hash` hold the remote signature —
 /// its modification time and size as strings — since no cheap content hash is
 /// exposed; change detection is `(mtime, size)` on each side.
 #[derive(Clone, Debug, PartialEq)]
@@ -39,7 +39,7 @@ pub struct StoredSyncEntry {
     ///
     /// `local_mtime` alone cannot tell an edit that landed inside the same
     /// second as the last sync — and left the file the same length — from no
-    /// edit at all, so those never uploaded (bugs.md B25). `None` on a row
+    /// edit at all, so those never uploaded (`docs/BUGS.md` B25). `None` on a row
     /// written before schema 28, which the comparison reads as "compare whole
     /// seconds", so upgrading does not make an entire mirror look changed.
     pub local_mtime_ns: Option<i64>,
@@ -345,7 +345,7 @@ impl Db {
     /// Drop the entire baseline for a folder. Used when flipping ondemand→mirror:
     /// the local tree was evicted, so the old baseline is stale and would make the
     /// next reconcile mistake "locally deleted" for "must re-download". Clearing it
-    /// leaves an empty baseline + full remote = pure download (devices.md P3).
+    /// leaves an empty baseline + full remote = pure download.
     pub fn sync_entries_clear(&self, folder_id: i64) -> Result<()> {
         let conn = self.conn.lock();
         conn.execute(

crates/pdfs-core/src/db/tests.rs

@@ -675,8 +675,8 @@ fn foreign_folder(volume: &str, link: &str, parent: NodeUid, name: &str) -> Node
     node
 }
 
-/// Recovering the root by uid is what lets the daemon mount offline
+/// Recovering the root by uid is what lets the daemon mount offline:
-/// (offline.md Phase 1): the uid is remembered in `sync_state`, the node
+/// the uid is remembered in `sync_state`, the node
 /// itself comes back out of `nodes`.
 #[test]
 fn node_by_uid_recovers_a_stored_node() {
@@ -796,7 +796,7 @@ fn children_if_listed_gated_on_flag() {
     assert_eq!(kids.len(), 2);
 }
 
-/// The shape of the `mv`-loses-the-file bug (bugs.md B1): a rename deletes the
+/// The shape of the `mv`-loses-the-file bug (`docs/BUGS.md` B1): a rename deletes the
 /// moved node's row, so a destination left marked `listed` is rebuilt from the DB
 /// without it — the file is gone from the source and absent from the destination,
 /// with `rename(2)` having reported success. Clearing the flag is what forces the
@@ -5735,7 +5735,7 @@ fn cache_eviction_candidates_are_lru_ordered_and_limited() {
     );
 }
 
-/// **The B5 checkpoint.** `improvements.md` P2.3 proposes concurrent SQLite
+/// **The B5 checkpoint.** A performance plan proposed concurrent SQLite
 /// reads, on the premise that the single `Mutex<Connection>` serializes the FUSE
 /// workers. This measures what the connection is actually asked to do now that
 /// B3 and B4 have landed, so the proposal is decided on evidence.
@@ -6291,7 +6291,7 @@ fn migration_v27_adds_the_access_deferral_column_to_a_v26_queue() {
 /// back with no nanosecond time. That `None` is the whole point: it makes the
 /// comparison fall back to whole seconds for rows written before the column
 /// existed, instead of asserting a sub-second time of zero and re-uploading
-/// every already-synced file in the folder (bugs.md B25).
+/// every already-synced file in the folder (`docs/BUGS.md` B25).
 #[test]
 fn migration_v28_adds_sub_second_local_times_without_disturbing_a_v27_baseline() {
     let path = std::env::temp_dir().join(format!(

crates/pdfs-core/src/db/trash.rs

@@ -102,5 +102,5 @@ impl Db {
         Ok(seen)
     }
 
-    // ---- device sync (devices.md) -----------------------------------------
+    // ---- device sync -----------------------------------------
 }

crates/pdfs-core/src/profile.rs

@@ -1,4 +1,4 @@
-//! The machine profile that travels with a device (features.md 5.3).
+//! The machine profile that travels with a device.
 //!
 //! Sync folder mappings, pins, and the settings that shape them live in
 //! `cache.db` and `config.json` — both on the local disk. When that disk dies,

crates/pdfs-core/src/syncignore.rs

@@ -1,4 +1,4 @@
-//! Selective-sync ignore rules for mirror folders (features.md 1.1).
+//! Selective-sync ignore rules for mirror folders.
 //!
 //! A mirror folder otherwise uploads every path beneath its root, which for a
 //! project directory means `node_modules/`, `.git/`, and `target/` — quota

crates/pdfs-fuse/src/background.rs

@@ -143,7 +143,7 @@ fn apply_event(core: &Core, event: &DriveEvent, dirty: &mut DirtyParents) -> pdf
             // create, and re-fetching would replace the size and mtime of the
             // write we just accepted with the stale revision's — making a file
             // that was copied in seconds ago read as empty until its upload
-            // lands (offline.md Phase 3).
+            // lands.
             //
             // A write that has already drained is the same story one step later:
             // the drain brought the tree level with the revision it sealed, so
@@ -375,7 +375,7 @@ pub(super) async fn run_event_sync(
         // server head; persist it so the next restart resumes instead of
         // reseeding (which would skip everything that changed offline).
         // Seeding needs the network, and this task also runs on mounts that
-        // started offline (offline.md Phase 1) — so retry rather than giving up,
+        // started offline — so retry rather than giving up,
         // which used to disable live sync for the life of the daemon.
         Ok(None) => {
             // Nothing says what changed before this cursor, so a persisted SDK
@@ -660,7 +660,7 @@ pub(super) fn run_local_index(
             scan_local_once(&db, &indexing, &transfers, &mountpoint);
         }
         // Interruptible, so teardown joins this thread instead of leaving it to
-        // keep rewriting the index for a mount that is gone (bugs.md B44).
+        // keep rewriting the index for a mount that is gone (`docs/BUGS.md` B44).
         if !shutdown.sleep(LOCAL_INDEX_CHECK) {
             return;
         }

crates/pdfs-fuse/src/control.rs

@@ -1816,7 +1816,7 @@ pub(crate) fn run_control_socket(
     info!("control socket listening");
     for conn in listener.incoming() {
         // Checked on every accept, including the deliberate poke teardown sends
-        // to wake this thread out of a blocking accept (bugs.md B44).
+        // to wake this thread out of a blocking accept (`docs/BUGS.md` B44).
         if core.shutdown.is_stopping() {
             info!("control socket closing");
             return;

crates/pdfs-fuse/src/devices.rs

@@ -1,5 +1,5 @@
 //! This machine as a Proton Drive Device, and the local folders it keeps in
-//! step with the remote (devices.md).
+//! step with the remote.
 //!
 //! A sync folder runs in one of two modes. `mirror` keeps a real local tree that
 //! the engine in [`super::sync`] reconciles both ways; `ondemand` evicts that
@@ -184,8 +184,8 @@ impl Core {
     }
 
     /// Adopt an existing device as *this* machine's, pinning it in `config.json`
-    /// so hostname changes and reinstalls stop registering duplicates
+    /// so hostname changes and reinstalls stop registering duplicates.
-    /// (features.md 5.1). `None` clears the pin and returns to hostname matching.
+    /// `None` clears the pin and returns to hostname matching.
     ///
     /// Refuses a uid that is not in the account: the whole point of the pin is
     /// that it is authoritative, so accepting a bad one would defer the failure
@@ -260,7 +260,7 @@ impl Core {
         })
     }
 
-    // ---- device folder sync (devices.md, Phase 1) -------------------------
+    // ---- device folder sync -------------------------
 
     /// Auto-register (or recover) this machine as a Proton Drive Device, caching
     /// it so restarts reuse the same device. Recovery matches an existing remote
@@ -270,8 +270,7 @@ impl Core {
     /// Resolution order: the *adopted* uid pinned in `config.json`, then the
     /// cached DB row (validated remotely), then a hostname match, then create.
     /// The pin exists because the hostname heuristic silently registers a second
-    /// device after a rename or reinstall, orphaning the first one's folders
+    /// device after a rename or reinstall, orphaning the first one's folders.
-    /// (features.md 5.1).
     pub(crate) fn ensure_device(&self) -> CoreResult<StoredDevice> {
         let name = this_hostname();
         // Enumerate the remote devices once: used to validate the pin, validate
@@ -617,7 +616,7 @@ impl Core {
     }
 
     /// A sibling Core for a secondary FUSE session rooted at an `ondemand` sync
-    /// folder (devices.md Phase 3). It shares everything with this one,
+    /// folder. It shares everything with this one,
     /// the tree included, except what belongs to a session: its root and its
     /// kernel channel, both filled in when the session is built.
     pub(crate) fn fork_state(&self) -> Core {
@@ -986,8 +985,7 @@ impl Core {
     /// restart (their local dirs are empty on disk — the files live in the cloud).
     /// Best-effort per folder: a missing local path or a failed remote fetch marks
     /// the folder `error` and moves on rather than aborting the rest. Runs on its
-    /// own thread from `mount` so the network fetches never block startup
+    /// own thread from `mount` so the network fetches never block startup.
-    /// (devices.md Phase 4).
     pub(crate) fn restore_ondemand_mounts(&self) {
         let folders = match self.db.sync_folder_list() {
             Ok(f) => f,

crates/pdfs-fuse/src/drain.rs

@@ -1,7 +1,7 @@
 //! The write-back drain: turning queued mutations into remote calls.
 //!
 //! Every write the kernel hands us is answered the moment its bytes and its
-//! `pending_op` row are on disk (offline.md Phase 3), which is what lets a `cp`
+//! `pending_op` row are on disk, which is what lets a `cp`
 //! into the mount run at disk speed and lets an offline write succeed at all.
 //! This module is the other half: the worker that walks that queue and performs
 //! the uploads, creates, renames and trashes it recorded.
@@ -276,8 +276,7 @@ fn run_authorized_drain(
 }
 
 impl Core {
-    /// Drain the pending-op queue: the background half of every write
+    /// Drain the pending-op queue: the background half of every write.
-    /// (offline.md Phase 3).
     ///
     /// Runs for the life of the mount. Ops are replayed oldest-first, each
     /// retried with doubling backoff and *never* dropped on failure — the staged
@@ -306,7 +305,7 @@ impl Core {
         loop {
             // Between ops, never inside one: an op that has started is either
             // retired or released, so stopping here cannot leave the queue with
-            // a row claimed by a worker that no longer exists (bugs.md B44).
+            // a row claimed by a worker that no longer exists (`docs/BUGS.md` B44).
             if self.shutdown.is_stopping() {
                 debug!(primary, "drain worker stopping");
                 return;
@@ -1150,7 +1149,7 @@ impl Core {
     }
 
     /// Make a node that so far exists only on this machine real, and adopt the
-    /// uid the server gives it (offline.md Phase 3b).
+    /// uid the server gives it.
     pub(crate) fn drain_local_node(
         &self,
         op: &PendingOp,
@@ -1850,7 +1849,7 @@ impl Core {
     /// that window the node can be rewritten by another device, trashed, or
     /// deleted outright. Sending the blob anyway would silently drop whatever
     /// happened in between, which is exactly the thing the sync engine refuses
-    /// to do (offline.md Phase 3b).
+    /// to do.
     ///
     /// Only checkable against a recorded baseline: a write staged before
     /// [`StagedWrite::based_on`] existed, or one against a node that has never
@@ -2009,7 +2008,7 @@ impl Core {
         self.db.delete_op(op.id)?;
         // Dropping the pending entry hands the node back to the remote's truth:
         // reads stop coming from the staged blob, and the event sync stops
-        // skipping it as "ahead of the server" (offline.md Phase 3a). Only if it
+        // skipping it as "ahead of the server". Only if it
         // is still *this* write's entry — see [`Core::release_pending`].
         self.release_pending(uid, blob);
         self.cache.discard_staged(blob);

crates/pdfs-fuse/src/filesystem.rs

@@ -132,7 +132,7 @@ impl Filesystem for ProtonFs {
         // A provisional size is the *ciphertext* size, which is larger than the
         // file. Publishing it makes every reader that trusts `st_size` — rsync,
         // mmap, sendfile, a sized read loop — run off the end of the file and
-        // fail. So resolve it before answering rather than after (bugs.md B14).
+        // fail. So resolve it before answering rather than after (`docs/BUGS.md` B14).
         //
         // The cost is one batched round trip for the whole folder, not one per
         // file: `ls -l` is one `getattr` per entry and they collapse onto a
@@ -172,7 +172,7 @@ impl Filesystem for ProtonFs {
     /// here — once per `opendir`, which the kernel pairs exactly with one
     /// `releasedir` — is what makes the offsets stable, so a create or a trash
     /// during an enumeration can no longer make the caller skip or repeat an
-    /// entry (bugs.md B43).
+    /// entry (`docs/BUGS.md` B43).
     ///
     /// Enumerating a cold folder is a remote call, so it goes to a worker for
     /// the same reason `lookup` and `readdir` do.
@@ -346,7 +346,7 @@ impl Filesystem for ProtonFs {
         self.core.workers.run(Lane::Transfer, "read", move || {
             // The revision disagrees with a provisional size, and B84 fails
             // such a read outright, so settle the size first. On the network,
-            // hence here and not above (bugs.md B100).
+            // hence here and not above (`docs/BUGS.md` B100).
             let fsize = match provisional {
                 true => core.resolve_provisional_size(ino.0, &uid).unwrap_or(fsize),
                 false => fsize,
@@ -517,7 +517,7 @@ impl Filesystem for ProtonFs {
                 // `> file`. This is the second write path into the API, and
                 // queueing it is what lets a redirect work offline at all: it
                 // never reaches `release`, so without this it failed before any
-                // byte was written (offline.md Phase 2/3b).
+                // byte was written.
                 //
                 // The one branch of `setattr` that can reach the network:
                 // shrinking keeps the prefix, which `queue_truncate` gap-fills
@@ -607,7 +607,7 @@ impl Filesystem for ProtonFs {
     }
 
     /// `close(2)` calls flush before release. The upload is queued in `release`
-    /// and performed in the background (offline.md Phase 3), so there is nothing
+    /// and performed in the background, so there is nothing
     /// to push here — the written bytes are already in the scratch file.
     fn flush(
         &self,
@@ -985,7 +985,7 @@ pub struct ProtonFs {
 }
 
 /// How many times a write `open` will re-read its base after a `release`
-/// published a newer queued revision underneath it (bugs.md B32).
+/// published a newer queued revision underneath it (`docs/BUGS.md` B32).
 ///
 /// One retry covers the race, which needs a close and an open of the same file
 /// to overlap on different threads. More than that is not contention, it is a
@@ -1021,7 +1021,7 @@ fn build_listing(st: &State, ino: u64) -> DirListing {
 ///
 /// The cookie handed back is the index of the *next* entry, so a resumed call
 /// continues exactly where the last one stopped — which is only true because
-/// the listing behind those indexes is a snapshot (bugs.md B43).
+/// the listing behind those indexes is a snapshot (`docs/BUGS.md` B43).
 fn reply_listing(listing: &DirListing, offset: u64, root: u64, mut reply: ReplyDirectory) {
     for (i, (ino, is_dir, name)) in listing.iter().enumerate().skip(offset as usize) {
         let ft = if *is_dir {
@@ -1094,7 +1094,7 @@ impl ProtonFs {
                             // `getattr` would, so `ls -l` — which is one `lookup`
                             // per entry and no `getattr` at all — takes its sizes
                             // from here. Resolving only in `getattr` left the whole
-                            // listing provisional (bugs.md B14).
+                            // listing provisional (`docs/BUGS.md` B14).
                             let provisional = matches!(
                                 &e.node.kind,
                                 NodeKind::File {
@@ -1276,7 +1276,7 @@ impl ProtonFs {
         // revision in between sends this around again. Without the re-check the
         // new handle carried the *older* base, and its own release published
         // content that silently discarded the revision closed a moment earlier
-        // (bugs.md B32). A second attempt is already unlikely and a third would
+        // (`docs/BUGS.md` B32). A second attempt is already unlikely and a third would
         // mean something is republishing continuously, so give up rather than
         // spin: the caller's `open` fails instead of its data being lost.
         //
@@ -1286,7 +1286,7 @@ impl ProtonFs {
             for attempt in 0..OPEN_BASE_ATTEMPTS {
                 // The handle starts at the base's size. A provisional one is the
                 // ciphertext size, so the file would grow by the encryption
-                // overhead and reading the base would fail (bugs.md B100). A
+                // overhead and reading the base would fail (`docs/BUGS.md` B100). A
                 // queued revision stamps a real size, so this only goes to the
                 // network for a file the listing has not sized yet.
                 if provisional && self.core.pending_blob(&uid).is_none() {
@@ -1541,7 +1541,7 @@ impl ProtonFs {
         let transient = is_transient_name(name);
         // Offline the server cannot mint a uid, so invent one and queue the
         // create. The file is real to the caller either way; only its identity is
-        // provisional until the drain (offline.md Phase 3b).
+        // provisional until the drain.
         //
         // A parent that is itself still queued forces the same path even when we
         // are online: the API has no folder to put this in yet.
@@ -1652,7 +1652,7 @@ impl ProtonFs {
             .ok();
         // As in `create`: offline — or under a parent that is itself still
         // queued — the folder becomes a placeholder that the drain turns into a
-        // real one (offline.md Phase 3b).
+        // real one.
         // Losing the network on the way queues it the same way.
         let minted = if self.core.sends_inline() && !is_local_uid(&parent_uid) {
             if let Err(error) = self.core.require_uid_writable(&parent_uid) {
@@ -1874,7 +1874,7 @@ impl ProtonFs {
         // rename, so the victim has to be removed first and the operation stops
         // being atomic. Without this the 422 surfaced as a blanket EIO and every
         // write-to-temp-then-rename tool — rsync, atomic editor saves — failed
-        // at the very end of its transfer (bugs.md B13).
+        // at the very end of its transfer (`docs/BUGS.md` B13).
         //
         // `RENAME_EXCHANGE` has no Proton primitive and cannot be emulated
         // without a window in which one of the two names does not exist.
@@ -1956,8 +1956,7 @@ impl ProtonFs {
         };
         // A node whose own creation is still queued has no server-side identity
         // to rename: the queued op *is* the node, so rewriting its target is the
-        // whole rename. Nothing reaches the API, which is why this works offline
+        // whole rename. Nothing reaches the API, which is why this works offline.
-        // (offline.md Phase 3b).
         // A create that lands meanwhile leaves no op to rewrite; the node is
         // then renamed by the uid Drive gave it (docs/BUGS.md B142).
         if is_local_uid(&uid) {
@@ -2156,7 +2155,7 @@ impl ProtonFs {
             .is_some_and(|e| e.open_count > 0);
         // A node the server has never heard of cannot be trashed there; deleting
         // it just means its queued creation is no longer wanted. This works
-        // offline, which the remote path below cannot (offline.md Phase 3b).
+        // offline, which the remote path below cannot.
         if is_local_uid(&uid) {
             let dropped = if open_now {
                 self.core.withdraw_queued_ops(&uid)
@@ -2185,7 +2184,7 @@ impl ProtonFs {
         }
         // Offline: queue it. Trashing is the one mutation a user expects to work
         // regardless — the file is gone from their point of view the moment the
-        // command returns (offline.md Phase 3b). The same when the network goes
+        // command returns. The same when the network goes
         // away under the remote call below.
         let queue_it = |reply: ReplyEmpty| match self.core.queue_trash(&uid, name) {
             Ok(()) => reply.ok(),
@@ -2234,7 +2233,7 @@ impl ProtonFs {
         self.core.invalidate_trash();
         // Every other trash site records itself; this one did not, which made a
         // file found in the trash impossible to attribute after the fact — the
-        // activity log was the only record and it showed nothing (bugs.md B2).
+        // activity log was the only record and it showed nothing (`docs/BUGS.md` B2).
         self.core
             .log_activity(ActivityKind::Trash, name, "trashed from the mount", true);
         reply.ok();

crates/pdfs-fuse/src/lib.rs

@@ -226,7 +226,7 @@ const DRAIN_WORKERS: usize = 16;
 const STAGING_ORPHAN_RETAIN: Duration = Duration::from_secs(30 * 24 * 60 * 60);
 
 /// First and longest delay between probes for the network coming back after an
-/// offline mount (offline.md Phase 1). Doubles from min to max: a laptop shut in
+/// offline mount. Doubles from min to max: a laptop shut in
 /// a bag is the common case, so the steady state must be cheap, while a brief
 /// blip should still recover in seconds.
 const ONLINE_PROBE_MIN: Duration = Duration::from_secs(5);
@@ -334,7 +334,7 @@ const MAX_THUMBNAIL_MISSES: usize = 8192;
 ///
 /// Matches the SDK's own `MAX_BATCH_COUNT`, so a chunk is exactly one request:
 /// chunking smaller would add round trips, larger would be split anyway and
-/// delay the waiters this chunking exists to release (bugs.md B14).
+/// delay the waiters this chunking exists to release (`docs/BUGS.md` B14).
 const SIZE_UPGRADE_CHUNK: usize = 150;
 
 /// How many folders may have a size upgrade in flight at once.
@@ -344,7 +344,7 @@ const SIZE_UPGRADE_CHUNK: usize = 150;
 /// both with the number of folders it walked. Eight keeps an interactive `ls -l`
 /// (one folder, sometimes a couple) entirely unaffected while putting a ceiling
 /// on the recursive case. A folder past the cap is queued, not dropped: one of
-/// the running threads takes it over when its own batch ends (bugs.md B100).
+/// the running threads takes it over when its own batch ends (`docs/BUGS.md` B100).
 const MAX_SIZE_UPGRADES: usize = 8;
 
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -535,7 +535,7 @@ struct Core {
     workers: Arc<Workers>,
     /// Unified SQLite metadata cache: the persistence layer behind the in-memory
     /// `State` maps. Every mutation writes through here, and the maps rehydrate
-    /// from it on mount (plan.md P1).
+    /// from it on mount.
     db: Arc<Db>,
     /// Serializes only shared-list publication and access-loss invalidation.
     /// Network calls happen before taking it.
@@ -545,8 +545,8 @@ struct Core {
     /// Successful refreshes suppress retries even if persisting their timestamp
     /// fails. Shared across primary/fork clones and cleared by access events.
     shared_refresh_deadlines: Arc<Mutex<SharedRefreshDeadlines>>,
-    /// False while the API is unreachable and we are serving the cached tree
+    /// False while the API is unreachable and we are serving the cached tree.
-    /// (offline.md Phase 1). Set by the probe thread; read by front-ends through
+    /// Set by the probe thread; read by front-ends through
     /// `Response::Status` so the UI can say so rather than leaving the user to
     /// infer it from a wall of EIO.
     online: Arc<AtomicBool>,
@@ -557,8 +557,8 @@ struct Core {
     /// [`pause::PAUSED_INDEFINITELY`] for "until resumed", `0` when not paused.
     /// Persisted, so a pause survives a restart (see [`Core::sync_paused`]).
     sync_paused_until: Arc<AtomicI64>,
-    /// Writes accepted from the kernel but not yet uploaded, keyed by node
+    /// Writes accepted from the kernel but not yet uploaded, keyed by node.
-    /// (offline.md Phase 3). The in-memory face of the `pending_op` table, from
+    /// The in-memory face of the `pending_op` table, from
     /// which it is rebuilt on mount.
     ///
     /// Two things read it: [`Core::read_range`], because until the op drains the
@@ -586,7 +586,7 @@ struct Core {
     /// the queue instead of waiting out their backoff.
     drain_wake: Arc<(Mutex<bool>, Condvar)>,
     /// The daemon's stop signal, shared with every background loop this `Core`
-    /// was cloned into so teardown can end and join them (bugs.md B44).
+    /// was cloned into so teardown can end and join them (`docs/BUGS.md` B44).
     shutdown: Arc<shutdown::Shutdown>,
     /// How long this node's last upload actually took, in milliseconds, with
     /// the time it was measured for eviction. Feeds
@@ -695,7 +695,7 @@ struct Core {
     /// Size upgrades currently running, per folder inode, across every mount. A `getattr` that
     /// needs a real size waits on the entry rather than issuing its own fetch —
     /// `ls -l` of a folder is one `getattr` per file, and they must collapse
-    /// onto a single batch (bugs.md B14).
+    /// onto a single batch (`docs/BUGS.md` B14).
     size_upgrades: Arc<Mutex<HashMap<u64, Arc<SizeUpgrade>>>>,
     /// Replies parked on those upgrades. Shared across every mount for the same
     /// reason the pool is: the bound that matters is per daemon.
@@ -726,11 +726,11 @@ struct Core {
     /// can say what a pass is doing rather than just "syncing". An entry exists
     /// only while that folder's reconcile pass is running.
     sync_progress: Arc<Mutex<HashMap<i64, SyncProgress>>>,
-    /// Channel to the folder-sync engine (devices.md Phase 2): nudges it to
+    /// Channel to the folder-sync engine: nudges it to
     /// reconcile a folder, reconcile everything, or re-scan its watch set.
     sync_tx: std::sync::mpsc::Sender<sync::SyncMsg>,
     /// Secondary FUSE sessions for `ondemand` sync folders, keyed by sync-folder
-    /// id (devices.md Phase 3). Each is a `ProtonFs` rooted at the folder's remote
+    /// id. Each is a `ProtonFs` rooted at the folder's remote
     /// node, mounted over its local path, sharing this Core's client/cache/db and
     /// tree but with its own root (`fork_state`). Held so we can unmount on
     /// toggle back to `mirror` and on daemon shutdown. Each entry retains the
@@ -1833,8 +1833,7 @@ impl Core {
         info!(nodes = st.entries.len(), "hydrated metadata cache from db");
     }
 
-    /// Rebuild the in-memory pending map from the `pending_op` table on mount
+    /// Rebuild the in-memory pending map from the `pending_op` table on mount.
-    /// (offline.md Phase 3).
     ///
     /// A queued write survives a restart — that is the point of persisting it —
     /// so until the drain worker gets to it, reads of that file must still come
@@ -2774,7 +2773,7 @@ impl Core {
             missing.push(uid.clone());
         }
         // Returned, not awaited here: the caller is a `getattr` that must not
-        // answer with a provisional size (bugs.md B14), and it parks its reply
+        // answer with a provisional size (`docs/BUGS.md` B14), and it parks its reply
         // on this batch rather than holding a thread until it lands.
         self.upgrade_sizes(key, missing)
     }
@@ -2791,7 +2790,7 @@ impl Core {
     /// `total_size_on_storage`, the *ciphertext* size, which is slightly larger
     /// than the real one. A read must not plan on it: since B84 a size the
     /// revision disagrees with fails the read, so `read` settles the size first
-    /// ([`Core::resolve_provisional_size`], bugs.md B100). In `stat` it is a
+    /// ([`Core::resolve_provisional_size`], `docs/BUGS.md` B100). In `stat` it is a
     /// discrepancy that closes within a round trip, not a repeat of B11 (which
     /// reported **0** and so suppressed reads entirely).
     ///
@@ -2865,11 +2864,11 @@ impl Core {
     /// Chunked so a waiter is released as soon as *its* file is resolved. A
     /// single 793-node batch took ~80 s, which outran [`SizeUpgrade::WAIT`] and
     /// put provisional sizes back in front of callers — the bug this was
-    /// supposed to fix (bugs.md B14).
+    /// supposed to fix (`docs/BUGS.md` B14).
     ///
     /// When the batch ends, the thread takes over the oldest batch the cap held
     /// back, so at most [`MAX_SIZE_UPGRADES`] threads run however many folders
-    /// a recursive walk touches (bugs.md B100).
+    /// a recursive walk touches (`docs/BUGS.md` B100).
     fn run_size_upgrade(&self, key: u64, uids: Vec<NodeUid>, slot: Arc<SizeUpgrade>) {
         let (mut key, mut uids, mut slot) = (key, uids, slot);
         loop {
@@ -2897,7 +2896,7 @@ impl Core {
     /// size it is given against the revision's own block table and fails the
     /// read on a mismatch (B84), so reading on the provisional size is an `EIO`
     /// every time. `getattr` usually settles the size first, but not when its
-    /// wait times out, so the read cannot rely on it (bugs.md B100).
+    /// wait times out, so the read cannot rely on it (`docs/BUGS.md` B100).
     fn resolve_provisional_size(&self, ino: u64, uid: &NodeUid) -> Option<u64> {
         let parent = self.state().entries.get(&ino)?.parent;
         // Without a network the answer is `None` either way; the bound keeps a
@@ -3317,8 +3316,7 @@ impl Core {
         }
     }
 
-    /// Accept a released write handle's bytes and queue their upload
+    /// Accept a released write handle's bytes and queue their upload.
-    /// (offline.md Phase 3).
     ///
     /// This is what makes a copy into the mount run at disk speed: the caller's
     /// `close` returns once the bytes are staged on local disk and the intent is
@@ -3785,8 +3783,8 @@ impl Core {
         Ok(())
     }
 
-    /// Invent a node under `parent_uid` and queue the op that will make it real
+    /// Invent a node under `parent_uid` and queue the op that will make it real.
-    /// (offline.md Phase 3b). Returns the node to intern, exactly as the online
+    /// Returns the node to intern, exactly as the online
     /// path returns the one the server minted.
     ///
     /// The parent may itself be a placeholder — `mkdir -p` offline, or `cp -r` of
@@ -3842,7 +3840,7 @@ impl Core {
     }
 
     /// Queue giving a node a new parent and/or name, and apply it to the tree
-    /// now (offline.md Phase 3b).
+    /// now.
     ///
     /// The op records the desired end state rather than the step, so it both
     /// supersedes any earlier queued rename and lets the drain skip whichever
@@ -3950,7 +3948,7 @@ impl Core {
     }
 
     /// Queue trashing a node the server knows about, and drop it from the tree
-    /// now (offline.md Phase 3b).
+    /// now.
     ///
     /// Anything else queued for this node is discarded first: the user has said
     /// the file should not exist, so uploading bytes to it or renaming it are
@@ -4081,7 +4079,7 @@ impl Core {
     ///
     /// The path identifies the revision: publication stages a fresh file and
     /// swaps the map entry to point at it, so an unchanged path means the base a
-    /// caller sampled earlier is still the base now (bugs.md B32).
+    /// caller sampled earlier is still the base now (`docs/BUGS.md` B32).
     fn pending_blob(&self, uid: &NodeUid) -> Option<PathBuf> {
         self.pending.lock().get(uid).map(|p| p.path.clone())
     }
@@ -5124,7 +5122,7 @@ impl Core {
     /// `rename(2)` promises to replace an existing destination atomically. Proton
     /// offers no such primitive — `rename_node` refuses a name that is already
     /// taken — so this is the first half of an emulation that is *not* atomic:
-    /// see [`Core::restore_replaced`] for the other half (bugs.md B13).
+    /// see [`Core::restore_replaced`] for the other half (`docs/BUGS.md` B13).
     ///
     /// A node whose own creation is still queued has never reached the server, so
     /// dropping its queued ops is the whole removal; nothing goes to the wire and
@@ -5950,8 +5948,8 @@ fn parse_node_uid(s: &str) -> Option<NodeUid> {
 }
 
 /// The uid a node made on this machine goes by until it lands, so it can be
-/// interned, listed and written to before the server has ever heard of it
+/// interned, listed and written to before the server has ever heard of it:
-/// (offline.md Phase 3b): its row's local id, as [`pdfs_core::db::local_uid`]
+/// its row's local id, as [`pdfs_core::db::local_uid`]
 /// has it.
 fn local_node_uid(lid: i64) -> NodeUid {
     NodeUid::new(VolumeId::from(LOCAL_VOLUME), LinkId::from(lid.to_string()))
@@ -6114,7 +6112,7 @@ fn dir_is_empty(dir: &Path) -> std::io::Result<bool> {
 
 /// Delete everything inside `dir` but keep `dir` itself (it stays as the FUSE
 /// mountpoint). Used when a `mirror` folder flips to `ondemand`: the local files
-/// are the disk we're reclaiming (devices.md Phase 3).
+/// are the disk we're reclaiming.
 fn evict_dir_contents(dir: &Path) -> std::io::Result<()> {
     for entry in std::fs::read_dir(dir)? {
         let path = entry?.path();
@@ -6196,7 +6194,7 @@ struct Progress {
 ///
 /// Waiters are released **per chunk**, not once at the end: a waiter only cares
 /// about its own file, and waiting for the other 792 is what let a large folder
-/// outrun the timeout (bugs.md B14).
+/// outrun the timeout (`docs/BUGS.md` B14).
 #[derive(Default)]
 struct SizeUpgrade {
     inner: Mutex<Progress>,
@@ -6222,7 +6220,7 @@ enum SizeUpgradeClaim {
 /// Past the cap this used to return nothing, and the caller answered with the
 /// provisional size at once. Nothing retried the folder until the next `stat`,
 /// so a recursive walk over more than [`MAX_SIZE_UPGRADES`] fresh folders showed
-/// ciphertext sizes for most of them (bugs.md B100). Queued, the batch is still
+/// ciphertext sizes for most of them (`docs/BUGS.md` B100). Queued, the batch is still
 /// fetched, and a waiter gets the real size unless [`SizeUpgrade::WAIT`] runs out.
 fn claim_size_upgrade(
     in_flight: &mut HashMap<u64, Arc<SizeUpgrade>>,
@@ -6425,7 +6423,7 @@ impl SizeWaitQueue {
 /// Split out from the handler because it is the part that is pure and the part
 /// that is dangerous: every `Err` here is a refusal that happens *before*
 /// anything is trashed, and getting one wrong turns a refusal into the
-/// destruction of the destination (bugs.md B13).
+/// destruction of the destination (`docs/BUGS.md` B13).
 ///
 /// `dst_empty` is only meaningful when `dst_dir`; pass `true` otherwise.
 fn check_replaceable(src_dir: bool, dst_dir: bool, dst_empty: bool) -> Result<(), Errno> {
@@ -7155,7 +7153,7 @@ mod size_upgrade_tests {
     }
 
     /// Past the cap a folder used to get no upgrade at all, so a recursive
-    /// walk reported ciphertext sizes for most of what it listed (bugs.md B100).
+    /// walk reported ciphertext sizes for most of what it listed (`docs/BUGS.md` B100).
     #[test]
     fn a_folder_past_the_cap_is_queued_not_dropped() {
         let mut in_flight = HashMap::new();
@@ -7208,7 +7206,7 @@ mod replace_tests {
 
     /// The case that motivated all of this: rsync renaming its temp file over
     /// the real one. Two plain files, and it has to be allowed — refusing is
-    /// what made every rsync transfer fail at the last step (bugs.md B13).
+    /// what made every rsync transfer fail at the last step (`docs/BUGS.md` B13).
     #[test]
     fn a_file_may_replace_a_file() {
         assert!(check_replaceable(false, false, true).is_ok());

crates/pdfs-fuse/src/link.rs

@@ -248,7 +248,7 @@ impl Core {
     }
 
     /// Watch the link for the life of the mount: sleep while it is up, and
-    /// probe it back while it is down (offline.md Phase 1).
+    /// probe it back while it is down.
     ///
     /// A mount that started from the cache is down from the first moment; one
     /// that started online goes down when [`Core::mark_offline`] says so.

crates/pdfs-fuse/src/mount.rs

@@ -193,7 +193,7 @@ pub(super) fn clear_stale_mount(mountpoint: &Path) {
 }
 
 /// `sync_state` key holding the uid of the My Files root, so a later run can
-/// recover it from `nodes` without the API (offline.md Phase 1).
+/// recover it from `nodes` without the API.
 const ROOT_UID_KEY: &str = "root_uid";
 
 /// The My Files root, and whether we got it from the API (`true`) or from the
@@ -401,7 +401,7 @@ pub(crate) fn mount_with(
         .all_share_access()
         .map_err(|error| std::io::Error::other(format!("load shared access: {error}")))?;
 
-    // The folder-sync engine (devices.md Phase 2) runs on its own thread and is
+    // The folder-sync engine runs on its own thread and is
     // nudged over this channel; the sender lives in Core so control-socket
     // handlers can trigger reconciles.
     let (sync_tx, sync_rx) = std::sync::mpsc::channel::<sync::SyncMsg>();
@@ -501,7 +501,7 @@ pub(crate) fn mount_with(
     // Every long-lived thread started from here on is kept in `workers` and
     // joined at the end of this function. Leaving them running turned an
     // in-process remount into a second generation of drain workers, sync engines
-    // and sweeps all operating on a mount that no longer exists (bugs.md B44).
+    // and sweeps all operating on a mount that no longer exists (`docs/BUGS.md` B44).
     let mut workers: Vec<std::thread::JoinHandle<()>> = Vec::new();
     for worker in 0..DRAIN_WORKERS {
         let core = core.clone();
@@ -738,7 +738,7 @@ pub(crate) fn mount_with(
     };
 
     // Unmount every on-demand sync folder too, or the kernel mounts linger as
-    // stale and the next start fails with EBUSY (devices.md Phase 3).
+    // stale and the next start fails with EBUSY.
     if let Some(worker) = restore_worker
         && worker.join().is_err()
     {
@@ -798,7 +798,7 @@ const WORKER_JOIN_DEADLINE: Duration = Duration::from_secs(10);
 /// The mount used to return with its drain workers, sync engine, sweep, online
 /// probe, indexer and control listener all still running on `Core` clones. The
 /// process usually exited straight afterwards and hid it; an in-process remount
-/// did not, and started a second full set on top of the first (bugs.md B44).
+/// did not, and started a second full set on top of the first (`docs/BUGS.md` B44).
 ///
 /// Two of the waits need waking rather than merely flagging: the drain workers
 /// block on their own condvar (`wake_drain`), and the control listener blocks

crates/pdfs-fuse/src/profile.rs

@@ -1,5 +1,5 @@
 //! Reading and writing this machine's `profile.json` in its device root, and
-//! the restore that rebuilds a machine from one (features.md 5.2 and 5.3).
+//! the restore that rebuilds a machine from one.
 //!
 //! The document itself is defined in [`pdfs_core::profile`]; this is the half
 //! that talks to Drive. Saving is best-effort and never blocks a user action:
@@ -246,7 +246,7 @@ impl Core {
         Profile::parse(&buf).map(Some).map_err(CoreError::invalid)
     }
 
-    // ---- restore (features.md 5.2) ----------------------------------------
+    // ---- restore ----------------------------------------
 
     /// The folders under a device that could be synced here, each carrying a
     /// proposed local path. `device` names another registered device by uid;

crates/pdfs-fuse/src/reads.rs

@@ -464,7 +464,7 @@ impl Core {
     /// it, and the [`BLOCK_SIZE`] assumption when it has not — which is every
     /// first read, because learning it means opening a `RevisionReader`, and
     /// opening one per read is precisely the per-file key derivation the block
-    /// cache exists to avoid (bugs.md B12, B85).
+    /// cache exists to avoid (`docs/BUGS.md` B12, B85).
     ///
     /// Being wrong here is not a correctness problem: `read_at` plans over the
     /// real sizes and clamps to what was asked for either way. It costs a
@@ -493,13 +493,13 @@ impl Core {
     ) -> Result<Vec<u8>, Errno> {
         // A queued write has not reached the remote yet, so the remote's current
         // revision is stale and the staged blob is the truth. Serve from it until
-        // the drain worker lands the upload (offline.md Phase 3).
+        // the drain worker lands the upload.
         if let Some(pending) = self.pending.lock().get(uid).cloned() {
             return self.read_pending(&pending, offset, len);
         }
         // A node created offline and never written has no blob and no remote: it
         // is an empty file, and asking the API about a `local~` uid would only
-        // earn a 404 (offline.md Phase 3b). Unless its create landed since the
+        // earn a 404. Unless its create landed since the
         // read looked: the landing moved the queued write to the uid Drive
         // gave it, and the row says which (`docs/BUGS.md` B179).
         if is_local_uid(uid) {
@@ -636,7 +636,7 @@ impl Core {
     ///
     /// A block that comes back shorter than the file's size says it must be is
     /// never served, cached or promoted: it is repaired from the whole-file
-    /// download, or the read fails. See [`Core::repair_block`] (bugs.md B84).
+    /// download, or the read fails. See [`Core::repair_block`] (`docs/BUGS.md` B84).
     async fn read_block(
         &self,
         reader: &Arc<dyn RevisionRead>,
@@ -651,7 +651,7 @@ impl Core {
         // file's boundaries are wrong, and the failure is not confined to short
         // reads: sizes that *overstate* a block shift every block after it and
         // return full-length reads of the wrong bytes. So a disagreement of any
-        // kind takes the file off the range path entirely (bugs.md B84).
+        // kind takes the file off the range path entirely (`docs/BUGS.md` B84).
         let bytes = if reader.size() != fsize {
             warn!(
                 %uid, bidx = span.idx, fsize,
@@ -664,7 +664,7 @@ impl Core {
             // Learned here rather than on a path of its own: this is where a
             // reader is open anyway, and recording the real geometry is what
             // lets the *next* read plan its blocks on the revision's own
-            // boundaries instead of the 4 MiB fallback (bugs.md B85).
+            // boundaries instead of the 4 MiB fallback (`docs/BUGS.md` B85).
             if cache_blocks {
                 self.cache
                     .store_block_geometry(uid, mtime, fsize, reader.block_sizes());
@@ -706,7 +706,7 @@ impl Core {
     /// The range path derives every block boundary from the revision's recorded
     /// block sizes. When those understate the file, reads come back short with
     /// no error anywhere, and the caller hands userspace a truncated file that
-    /// looks like a clean EOF (bugs.md B84). `download_file_to` does not do that
+    /// looks like a clean EOF (`docs/BUGS.md` B84). `download_file_to` does not do that
     /// arithmetic — it streams the block list — so it returns the whole file
     /// where the range path cannot, which is why pinning was the workaround.
     /// This does the same thing on the user's behalf, once, and the resulting
@@ -918,7 +918,7 @@ impl Core {
         let end = offset.saturating_add(len).min(fsize);
         let mut out = Vec::with_capacity((end - offset) as usize);
         // On the revision's own boundaries where they are known, and on the
-        // 4 MiB fallback where they are not (bugs.md B85).
+        // 4 MiB fallback where they are not (`docs/BUGS.md` B85).
         let wanted = self.block_geometry(uid, mtime, fsize).spans(offset, end);
         let (Some(&head), Some(&tail)) = (wanted.first(), wanted.last()) else {
             return Ok(out);
@@ -1038,7 +1038,7 @@ impl Core {
             // — the cache validates it on read, the network path in `read_block`
             // — so this refuses rather than quietly contributing fewer bytes
             // than the range covers, which is what turned a bad block into a
-            // truncated file (bugs.md B84).
+            // truncated file (`docs/BUGS.md` B84).
             if block.len() as u64 != span.len {
                 error!(
                     %uid, bidx = span.idx, len = block.len(), expected = span.len, fsize,

crates/pdfs-fuse/src/shutdown.rs

@@ -6,7 +6,7 @@
 //! invisible; in an in-process remount — which is how the daemon recovers from a
 //! mount going away underneath it — it leaks a whole generation of threads that
 //! keep writing to the database and calling the API on behalf of a mount that no
-//! longer exists (bugs.md B44).
+//! longer exists (`docs/BUGS.md` B44).
 //!
 //! The primitive is deliberately small: a flag plus a condvar. Every loop that
 //! would otherwise call `thread::sleep` calls [`Shutdown::sleep`] instead, which

crates/pdfs-fuse/src/state.rs

@@ -183,7 +183,7 @@ impl WriteHandle {
     }
 }
 
-/// A released write whose upload has not happened yet (offline.md Phase 3).
+/// A released write whose upload has not happened yet.
 ///
 /// The bytes live in the content cache's staging dir and the intent lives in the
 /// `pending_op` table; this pairs them in memory so a read can be served without
@@ -253,7 +253,7 @@ pub(crate) struct State {
     /// two pages shifted every later entry, and the caller silently skipped or
     /// repeated whatever crossed the page boundary. Each entry is
     /// `(ino, is_dir, name)` — the kernel type is mapped at reply time so this
-    /// module stays free of `fuser` (bugs.md B43).
+    /// module stays free of `fuser` (`docs/BUGS.md` B43).
     pub(crate) dir_snapshots: HashMap<u64, Arc<DirListing>>,
     /// Resident inode attributes whose effective access changed during an
     /// intern/root refresh. Core drains this set and notifies the matching
@@ -1198,7 +1198,7 @@ impl State {
     /// re-enumerate, which is the cheaper way to stay honest about what the
     /// server did. A queued rename cannot: re-enumerating needs the network, and
     /// the server has not been told yet in any case — so this *is* the tree's
-    /// new truth until the op drains (offline.md Phase 3b).
+    /// new truth until the op drains.
     pub(crate) fn rename_in_place(
         &mut self,
         ino: u64,
@@ -1317,7 +1317,7 @@ impl State {
     /// created offline, nothing at all), so this row is the only record that the
     /// file is as long as the caller was told it is. Without it a restart serves
     /// the stale size and the file reads as truncated — or empty — while its
-    /// bytes sit safely in staging (offline.md Phase 3).
+    /// bytes sit safely in staging.
     /// Returns the node to persist rather than queueing it in the outbox, and is
     /// the one mutation here whose write-through the caller must do itself:
     /// failure has to be reported, not logged. Dropping the row silently means

crates/pdfs-fuse/src/sweep.rs

@@ -68,7 +68,7 @@ impl Core {
     /// docs for the identical/divergent policy.
     pub(crate) fn run_conflict_sweep_loop(&self) {
         // Both waits are interruptible, so teardown does not have to sit out a
-        // five-minute interval to join this thread (bugs.md B44).
+        // five-minute interval to join this thread (`docs/BUGS.md` B44).
         if !self.shutdown.sleep(CONFLICT_SWEEP_WARMUP) {
             return;
         }

crates/pdfs-fuse/src/sync.rs

@@ -1,4 +1,4 @@
-//! Two-way folder sync engine (devices.md Phase 2).
+//! Two-way folder sync engine.
 //!
 //! Each `mirror`-mode synced folder is kept mirrored between a local directory
 //! and a folder under this machine's Proton Drive device. A local filesystem
@@ -1342,7 +1342,7 @@ impl Core {
     /// rename below is the destructive step, and the download in between can run
     /// for minutes, so the destination is re-examined right before it: a local
     /// file that no longer matches the plan is set aside as a conflict copy
-    /// instead of being replaced (bugs.md B39).
+    /// instead of being replaced (`docs/BUGS.md` B39).
     #[allow(clippy::too_many_arguments)]
     async fn download_file(
         &self,
@@ -1441,7 +1441,7 @@ impl Core {
     /// the pre-upload identity is what makes the next pass see the path as
     /// locally changed and upload a whole, clean revision over it. Recording the
     /// post-upload stat instead declared the torn revision synchronized and left
-    /// it as the file's content on Drive (bugs.md B40).
+    /// it as the file's content on Drive (`docs/BUGS.md` B40).
     async fn record_file_baseline(
         &self,
         folder_id: i64,
@@ -1505,7 +1505,7 @@ fn open_to_upload(path: &Path, rel: &str) -> Result<Option<std::fs::File>, Strin
 /// records the identity the upload *read* rather than the one on disk now, so
 /// the next pass classifies the path as locally changed and replaces the torn
 /// revision. Without the log there is nothing in the journal to explain the
-/// extra revision (bugs.md B40).
+/// extra revision (`docs/BUGS.md` B40).
 fn warn_if_torn(rel: &str, path: &Path, streamed: LocalSig) {
     let now = local_sig(path);
     if !now.is_some_and(|now| now.same_content(&streamed)) {
@@ -1537,7 +1537,7 @@ fn local_sig(path: &Path) -> Option<LocalSig> {
 /// transfer started, and a download of a large file can run for minutes. Without
 /// this, a local edit completed inside that window was replaced by the remote
 /// version with no copy of it kept anywhere — the one shape of loss a sync
-/// engine must not have (bugs.md B39). Keeping the copy makes it re-upload as a
+/// engine must not have (`docs/BUGS.md` B39). Keeping the copy makes it re-upload as a
 /// new file on the next pass, which is the same resolution a both-sides-changed
 /// conflict already gets.
 ///
@@ -1573,7 +1573,7 @@ fn keep_racing_local_edit(path: &Path, expected: Option<LocalSig>) -> std::io::R
 /// exists, so the same removal was re-attempted and re-reported as an error on
 /// every pass, forever. Every other error is still an error, and keeping the
 /// baseline is exactly right there: the surviving file must not be mistaken for
-/// a new local creation on the next pass and uploaded back (bugs.md B42).
+/// a new local creation on the next pass and uploaded back (`docs/BUGS.md` B42).
 fn removed_locally(result: std::io::Result<()>) -> std::io::Result<()> {
     match result {
         Err(e) if e.kind() == std::io::ErrorKind::NotFound => Ok(()),
@@ -1830,7 +1830,7 @@ fn system_mtime(meta: &std::fs::Metadata) -> i64 {
 ///
 /// Whole seconds cannot distinguish an edit made in the same second as the last
 /// sync from no edit at all, and if the size did not change either, that file
-/// was never uploaded (bugs.md B25). `None` for a clock or filesystem that
+/// was never uploaded (`docs/BUGS.md` B25). `None` for a clock or filesystem that
 /// cannot answer, which falls the comparison back to seconds rather than
 /// asserting an mtime of zero.
 fn system_mtime_ns(meta: &std::fs::Metadata) -> Option<i64> {
@@ -1845,7 +1845,7 @@ mod tests {
 
     /// A removal of something already gone has produced the state the sync
     /// engine wanted, so its baseline is dropped rather than retried forever.
-    /// Anything else stays an error and keeps the baseline (bugs.md B42).
+    /// Anything else stays an error and keeps the baseline (`docs/BUGS.md` B42).
     #[test]
     fn an_already_absent_path_counts_as_removed() {
         let root = std::env::temp_dir().join(format!("pdfs-b42-{}", std::process::id()));
@@ -1862,7 +1862,7 @@ mod tests {
     }
 
     /// The download guard: a destination that still matches the plan is
-    /// replaced silently, one that has moved on since is kept (bugs.md B39).
+    /// replaced silently, one that has moved on since is kept (`docs/BUGS.md` B39).
     #[test]
     fn a_download_keeps_a_local_edit_it_did_not_plan_for() {
         let root = std::env::temp_dir().join(format!("pdfs-b39-{}", std::process::id()));
@@ -2177,7 +2177,7 @@ mod tests {
         std::fs::remove_dir_all(&root).unwrap();
     }
 
-    /// A restored folder (features.md 5.2) starts with an empty baseline against
+    /// A restored folder starts with an empty baseline against
     /// an empty local directory and a full remote. That must reconcile as
     /// "download everything" rather than tripping the wipe guard — otherwise
     /// every restore would wedge its folder on the first pass.

crates/pdfs-fuse/src/sync/engine.rs

@@ -33,7 +33,7 @@ pub(crate) enum SyncMsg {
     /// Re-read the folder set and adjust the filesystem watches (after add/remove).
     Rewatch,
     /// The daemon is tearing down: finish the current pass and end the engine
-    /// thread, so the mount can join it (bugs.md B44).
+    /// thread, so the mount can join it (`docs/BUGS.md` B44).
     Stop,
 }
 

crates/pdfs-fuse/src/sync/model.rs

@@ -20,7 +20,7 @@ impl LocalSig {
     /// Nanoseconds decide it when both sides have them; otherwise the comparison
     /// falls back to whole seconds, which is what a baseline row written before
     /// schema 28 — or a filesystem that reports no sub-second time — can support
-    /// (bugs.md B25).
+    /// (`docs/BUGS.md` B25).
     pub(super) fn same_content(&self, other: &Self) -> bool {
         if self.size != other.size {
             return false;
@@ -161,7 +161,7 @@ pub(super) enum Pending {
     /// was there. A download can run for minutes, so the apply step revalidates
     /// against it immediately before it renames over the destination: a writer
     /// that finished an edit in the meantime must not be overwritten without a
-    /// conflict copy (bugs.md B39).
+    /// conflict copy (`docs/BUGS.md` B39).
     Download {
         rel: String,
         uid: NodeUid,

crates/pdfs-fuse/src/sync/planner.rs

@@ -218,7 +218,7 @@ pub(super) fn plan_file(
     }
 
     let local_changed = local.is_some_and(|item| {
-        // Nanoseconds where both sides have them (bugs.md B25): whole seconds
+        // Nanoseconds where both sides have them (`docs/BUGS.md` B25): whole seconds
         // could not see an edit made in the same second as the last sync that
         // left the file the same length, so it was never uploaded.
         baseline.is_none_or(|base| !LocalSig::from(item).same_content(&LocalSig::from(base)))
@@ -291,7 +291,7 @@ mod file_plan_tests {
 
     /// Whole seconds cannot see an edit made inside the same second that leaves the
     /// file the same length, so a mirror silently stopped uploading it. With a
-    /// nanosecond time on both sides it is an ordinary local change (bugs.md B25).
+    /// nanosecond time on both sides it is an ordinary local change (`docs/BUGS.md` B25).
     #[test]
     fn a_same_second_same_size_edit_is_still_a_local_change() {
         let mut base = baseline(10, 20, 30, 40);

crates/pdfs-gui/src/app/pages/locations.rs

@@ -7,7 +7,7 @@
 //! `~/ProtonDrive` mount, plus each folder this computer backs up, whether it is
 //! a mirrored local directory or an on-demand FUSE session. The page is called
 //! *Locations* rather than *Mounts* because a mirror folder is a plain directory
-//! with no FUSE session behind it (mount-architecture.md §4).
+//! with no FUSE session behind it.
 //!
 //! The device rows drive the same control requests the Computers page used to:
 //! mode switch, sync now, remove. What is new here is that the primary mount is

crates/pdfs-gui/src/app/widgets/share_dialog.rs

@@ -133,7 +133,7 @@ impl Drop for Busy {
 /// from Shared or Shared-with-me may not: it can live under a device folder's
 /// own inode space, or on someone else's volume, neither of which the primary
 /// mount's path space can name. Those carry a uid instead, and the daemon
-/// resolves it with `Core::resolve_anywhere` (mount-architecture.md P4).
+/// resolves it with `Core::resolve_anywhere`.
 ///
 /// The two are separate request variants rather than one request with an
 /// optional field on purpose: an older daemon that ignored `uid` would resolve