feat(v1.1.5): files SDK + files:* triggers

Filesystem-backed blob storage as the fifth concrete trigger kind.

- `files::collection(c).{create,head,get,update,delete,list}` Rhai SDK
  (blob in/out; metadata maps; missing-field throws naming the field).
- `FilesService` trait in picloud-shared; `FsFilesRepo` (atomic
  write: temp→fsync→rename→fsync-dir→DB; single-pass SHA-256;
  checksum-verified reads → Corrupted) + `FilesServiceImpl` in
  manager-core. Metadata in Postgres (0018), bytes on disk under
  PICLOUD_FILES_ROOT with 0o700 shard dirs.
- `files:*` trigger kind via the Layout-E pattern (0019: widen both
  CHECKs + files_trigger_details), TriggerEvent::Files (metadata only,
  no bytes), emit_files fan-out, dispatcher arm, admin endpoint
  POST /triggers/files (reuses validate_trigger_target).
- AppFilesRead/AppFilesWrite capabilities → script:read/script:write
  (seven-scope commitment held). AppPubsubPublish reserved for v1.1.6.
- Admin files API (list + delete) + dashboard Files view per app.

Cross-app isolation keyed on cx.app_id at every layer. ~45 new tests
(service in-memory, fs tempdir, bridge integration). No DB required
for the suite. publish_ephemeral and the orphan sweep stay deferred.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/executor-core/src/engine.rs

@@ -348,6 +348,7 @@ fn build_ctx_map(req: &ExecRequest) -> Map {
 /// `docs/v1.1.x-design-notes.md` §4 (the dead-letter sub-shape) and
 /// §2/blueprint §9 (KV). Each variant becomes a Rhai map with a
 /// `source` discriminant plus per-source fields.
+#[allow(clippy::too_many_lines)]
 fn trigger_event_to_dynamic(event: &TriggerEvent) -> Dynamic {
     let mut m = Map::new();
     m.insert("source".into(), event.source().into());
@@ -406,6 +407,33 @@ fn trigger_event_to_dynamic(event: &TriggerEvent) -> Dynamic {
             cron_map.insert("fired_at".into(), fired_at.to_rfc3339().into());
             m.insert("cron".into(), cron_map.into());
         }
+        TriggerEvent::Files {
+            op,
+            collection,
+            id,
+            name,
+            content_type,
+            size,
+            checksum,
+            prev,
+        } => {
+            m.insert("op".into(), op.as_str().into());
+            let mut files_map = Map::new();
+            files_map.insert("collection".into(), collection.clone().into());
+            files_map.insert("id".into(), id.clone().into());
+            files_map.insert("name".into(), name.clone().into());
+            files_map.insert("content_type".into(), content_type.clone().into());
+            files_map.insert(
+                "size".into(),
+                i64::try_from(*size).unwrap_or(i64::MAX).into(),
+            );
+            files_map.insert("checksum".into(), checksum.clone().into());
+            files_map.insert(
+                "prev".into(),
+                prev.clone().map_or(Dynamic::UNIT, json_to_dynamic),
+            );
+            m.insert("files".into(), files_map.into());
+        }
         TriggerEvent::DeadLetter {
             dead_letter_id,
             original,

crates/executor-core/src/sdk/files.rs

@@ -0,0 +1,281 @@
+//! `files::` Rhai bridge — collection-scoped handle pattern (v1.1.5).
+//!
+//! ```rhai
+//! let avatars = files::collection("avatars");
+//! let id = avatars.create(#{ name: "a.jpg", content_type: "image/jpeg", data: blob });
+//! let meta  = avatars.head(id);   // metadata map or ()
+//! let bytes = avatars.get(id);    // Blob or ()
+//! avatars.update(id, #{ data: new_bytes });
+//! let gone  = avatars.delete(id); // bool (was-present)
+//! let page  = avatars.list();     // #{ files: [...], next_cursor: () }
+//! ```
+//!
+//! The `FilesHandle` custom Rhai type captures the collection name once
+//! and routes each call through the injected `Arc<dyn FilesService>`
+//! with the per-call `Arc<SdkCallCx>`. **The service derives `app_id`
+//! from `cx.app_id` — it never appears in any signature script-side,
+//! preserving cross-app isolation.**
+//!
+//! Error convention (per `docs/sdk-shape.md`): `create`/`update`/
+//! `delete` throw on failure; `get`/`head` return `()` for a missing
+//! file; `delete` returns `bool` (was-present). The blob bytes are a
+//! Rhai `Blob` (byte array) in both directions.
+
+use std::sync::Arc;
+
+use picloud_shared::{
+    FileMeta, FileUpdate, FilesError, FilesService, NewFile, SdkCallCx, Services,
+};
+use rhai::{Array, Dynamic, Engine as RhaiEngine, EvalAltResult, Map, Module};
+use tokio::runtime::Handle as TokioHandle;
+
+/// Per-call handle captured by the Rhai SDK. Cheap to clone (two Arcs
+/// plus an owned string).
+#[derive(Clone)]
+pub struct FilesHandle {
+    collection: String,
+    service: Arc<dyn FilesService>,
+    cx: Arc<SdkCallCx>,
+}
+
+pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<SdkCallCx>) {
+    let files_service = services.files.clone();
+
+    let mut module = Module::new();
+    {
+        let files_service = files_service.clone();
+        let cx = cx.clone();
+        module.set_native_fn(
+            "collection",
+            move |name: &str| -> Result<FilesHandle, Box<EvalAltResult>> {
+                if name.is_empty() {
+                    return Err("files::collection name must not be empty".into());
+                }
+                Ok(FilesHandle {
+                    collection: name.to_string(),
+                    service: files_service.clone(),
+                    cx: cx.clone(),
+                })
+            },
+        );
+    }
+    engine.register_static_module("files", module.into());
+
+    engine.register_type_with_name::<FilesHandle>("FilesHandle");
+
+    register_create(engine);
+    register_head(engine);
+    register_get(engine);
+    register_update(engine);
+    register_delete(engine);
+    register_list(engine);
+}
+
+fn register_create(engine: &mut RhaiEngine) {
+    engine.register_fn(
+        "create",
+        |handle: &mut FilesHandle, meta: Map| -> Result<String, Box<EvalAltResult>> {
+            let name = require_string(&meta, "name")?;
+            let content_type = require_string(&meta, "content_type")?;
+            let data = require_blob(&meta, "data")?;
+            let h = handle.clone();
+            let new = NewFile {
+                name,
+                content_type,
+                data,
+            };
+            let id = block_on(async move { h.service.create(&h.cx, &h.collection, new).await })?;
+            Ok(id.to_string())
+        },
+    );
+}
+
+fn register_head(engine: &mut RhaiEngine) {
+    engine.register_fn(
+        "head",
+        |handle: &mut FilesHandle, id: &str| -> Result<Dynamic, Box<EvalAltResult>> {
+            let h = handle.clone();
+            let id = id.to_string();
+            let meta = block_on(async move { h.service.head(&h.cx, &h.collection, &id).await })?;
+            Ok(meta.map_or(Dynamic::UNIT, |m| file_meta_to_map(&m).into()))
+        },
+    );
+}
+
+fn register_get(engine: &mut RhaiEngine) {
+    engine.register_fn(
+        "get",
+        |handle: &mut FilesHandle, id: &str| -> Result<Dynamic, Box<EvalAltResult>> {
+            let h = handle.clone();
+            let id = id.to_string();
+            let bytes = block_on(async move { h.service.get(&h.cx, &h.collection, &id).await })?;
+            Ok(bytes.map_or(Dynamic::UNIT, Dynamic::from_blob))
+        },
+    );
+}
+
+fn register_update(engine: &mut RhaiEngine) {
+    engine.register_fn(
+        "update",
+        |handle: &mut FilesHandle, id: &str, meta: Map| -> Result<(), Box<EvalAltResult>> {
+            let data = require_blob(&meta, "data")?;
+            let name = optional_string(&meta, "name")?;
+            let content_type = optional_string(&meta, "content_type")?;
+            let h = handle.clone();
+            let id = id.to_string();
+            let upd = FileUpdate {
+                data,
+                name,
+                content_type,
+            };
+            block_on(async move { h.service.update(&h.cx, &h.collection, &id, upd).await })
+        },
+    );
+}
+
+fn register_delete(engine: &mut RhaiEngine) {
+    engine.register_fn(
+        "delete",
+        |handle: &mut FilesHandle, id: &str| -> Result<bool, Box<EvalAltResult>> {
+            let h = handle.clone();
+            let id = id.to_string();
+            block_on(async move { h.service.delete(&h.cx, &h.collection, &id).await })
+        },
+    );
+}
+
+fn register_list(engine: &mut RhaiEngine) {
+    engine.register_fn(
+        "list",
+        |handle: &mut FilesHandle| -> Result<Map, Box<EvalAltResult>> {
+            list_call(handle, None, 0)
+        },
+    );
+    engine.register_fn(
+        "list",
+        |handle: &mut FilesHandle, cursor: &str| -> Result<Map, Box<EvalAltResult>> {
+            list_call(handle, Some(cursor.to_string()), 0)
+        },
+    );
+    engine.register_fn(
+        "list",
+        |handle: &mut FilesHandle, cursor: &str, limit: i64| -> Result<Map, Box<EvalAltResult>> {
+            let limit = u32::try_from(limit.max(0)).unwrap_or(0);
+            list_call(handle, Some(cursor.to_string()), limit)
+        },
+    );
+    // `list(#{ cursor, limit })` — the map form documented in the brief.
+    engine.register_fn(
+        "list",
+        |handle: &mut FilesHandle, opts: Map| -> Result<Map, Box<EvalAltResult>> {
+            let cursor = match opts.get("cursor") {
+                Some(v) if !v.is_unit() => {
+                    Some(v.clone().into_string().map_err(|_| -> Box<EvalAltResult> {
+                        "files: list cursor must be a string".into()
+                    })?)
+                }
+                _ => None,
+            };
+            let limit = match opts.get("limit") {
+                Some(v) if !v.is_unit() => {
+                    u32::try_from(v.as_int().unwrap_or(0).max(0)).unwrap_or(0)
+                }
+                _ => 0,
+            };
+            list_call(handle, cursor, limit)
+        },
+    );
+}
+
+fn list_call(
+    handle: &FilesHandle,
+    cursor: Option<String>,
+    limit: u32,
+) -> Result<Map, Box<EvalAltResult>> {
+    let h = handle.clone();
+    let page = block_on(async move {
+        h.service
+            .list(&h.cx, &h.collection, cursor.as_deref(), limit)
+            .await
+    })?;
+    let mut m = Map::new();
+    let files: Array = page
+        .files
+        .iter()
+        .map(|meta| Dynamic::from(file_meta_to_map(meta)))
+        .collect();
+    m.insert("files".into(), files.into());
+    m.insert(
+        "next_cursor".into(),
+        page.next_cursor.map_or(Dynamic::UNIT, Dynamic::from),
+    );
+    Ok(m)
+}
+
+/// Render a `FileMeta` into the Rhai map shape scripts see from
+/// `head` / `list`.
+fn file_meta_to_map(meta: &FileMeta) -> Map {
+    let mut m = Map::new();
+    m.insert("id".into(), meta.id.to_string().into());
+    m.insert("collection".into(), meta.collection.clone().into());
+    m.insert("name".into(), meta.name.clone().into());
+    m.insert("content_type".into(), meta.content_type.clone().into());
+    m.insert(
+        "size".into(),
+        i64::try_from(meta.size).unwrap_or(i64::MAX).into(),
+    );
+    m.insert("checksum".into(), meta.checksum.clone().into());
+    m.insert("created_at".into(), meta.created_at.to_rfc3339().into());
+    m.insert("updated_at".into(), meta.updated_at.to_rfc3339().into());
+    m
+}
+
+/// Pull a required string field out of a Rhai map; throw naming the
+/// field if it's absent or not a string.
+fn require_string(meta: &Map, field: &'static str) -> Result<String, Box<EvalAltResult>> {
+    match meta.get(field) {
+        Some(v) if v.is_string() => Ok(v.clone().into_string().unwrap_or_default()),
+        Some(_) => Err(format!("files::create: field '{field}' must be a string").into()),
+        None => Err(format!("files::create: missing required field '{field}'").into()),
+    }
+}
+
+/// Pull an optional string field; `None` when the key is absent or unit.
+fn optional_string(meta: &Map, field: &'static str) -> Result<Option<String>, Box<EvalAltResult>> {
+    match meta.get(field) {
+        None => Ok(None),
+        Some(v) if v.is_unit() => Ok(None),
+        Some(v) if v.is_string() => Ok(Some(v.clone().into_string().unwrap_or_default())),
+        Some(_) => Err(format!("files::update: field '{field}' must be a string").into()),
+    }
+}
+
+/// Pull a required blob (`data`) out of a Rhai map; throw naming the
+/// field if it's absent or not a blob.
+fn require_blob(meta: &Map, field: &'static str) -> Result<Vec<u8>, Box<EvalAltResult>> {
+    match meta.get(field) {
+        Some(v) if v.is_blob() => Ok(v.clone().into_blob().unwrap_or_default()),
+        Some(_) => Err(format!("files: field '{field}' must be a Blob (byte array)").into()),
+        None => Err(format!("files: missing required field '{field}'").into()),
+    }
+}
+
+/// Run an async future inside the synchronous Rhai context. Mirrors
+/// `kv::block_on`; safe because `LocalExecutorClient` runs the script
+/// under `spawn_blocking`, so a runtime handle is reachable.
+fn block_on<F, T>(fut: F) -> Result<T, Box<EvalAltResult>>
+where
+    F: std::future::Future<Output = Result<T, FilesError>> + Send,
+    T: Send,
+{
+    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
+        EvalAltResult::ErrorRuntime(
+            format!("files: no tokio runtime available: {e}").into(),
+            rhai::Position::NONE,
+        )
+        .into()
+    })?;
+    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
+        EvalAltResult::ErrorRuntime(format!("files: {err}").into(), rhai::Position::NONE).into()
+    })
+}

crates/executor-core/src/sdk/mod.rs

@@ -15,6 +15,7 @@ pub mod bridge;
 pub mod cx;
 pub mod dead_letters;
 pub mod docs;
+pub mod files;
 pub mod http;
 pub mod kv;
 pub mod stdlib;
@@ -37,5 +38,6 @@ pub fn register_all(engine: &mut RhaiEngine, services: &Services, cx: Arc<SdkCal
     kv::register(engine, services, cx.clone());
     docs::register(engine, services, cx.clone());
     dead_letters::register(engine, services, cx.clone());
-    http::register(engine, services, cx);
+    http::register(engine, services, cx.clone());
+    files::register(engine, services, cx);
 }

crates/executor-core/tests/module_redaction_logging.rs

@@ -99,6 +99,7 @@ async fn original_backend_error_is_logged_at_error_level() {
         Arc::new(NoopEventEmitter),
         Arc::new(FailingSource),
         Arc::new(NoopHttpService),
+        Arc::new(picloud_shared::NoopFilesService),
     );
     let engine = Engine::new(Limits::default(), services);
 

crates/executor-core/tests/modules.rs

@@ -97,6 +97,7 @@ fn services_with(modules: Arc<dyn ModuleSource>) -> Services {
         Arc::new(NoopEventEmitter),
         modules,
         Arc::new(NoopHttpService),
+        Arc::new(picloud_shared::NoopFilesService),
     )
 }
 

crates/executor-core/tests/sdk_docs.rs

@@ -228,6 +228,7 @@ fn make_engine() -> Arc<Engine> {
         Arc::new(NoopEventEmitter),
         Arc::new(NoopModuleSource),
         Arc::new(NoopHttpService),
+        Arc::new(picloud_shared::NoopFilesService),
     );
     Arc::new(Engine::new(Limits::default(), services))
 }

crates/executor-core/tests/sdk_files.rs

@@ -0,0 +1,333 @@
+//! `files::` SDK bridge integration tests — runs a real Rhai engine
+//! against an in-memory `FilesService` impl. Mirrors `tests/sdk_kv.rs`:
+//! `tokio::task::spawn_blocking` so the bridge's `block_on` has a
+//! reachable runtime. Exercises the actual Rhai surface — blob in/out,
+//! the metadata map shape, and the missing-required-field throw.
+
+use std::collections::BTreeMap;
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use picloud_executor_core::{Engine, ExecRequest, InvocationType, Limits};
+use picloud_shared::{
+    AppId, ExecutionId, FileMeta, FileUpdate, FilesError, FilesListPage, FilesService, NewFile,
+    NoopDeadLetterService, NoopDocsService, NoopEventEmitter, NoopHttpService, NoopKvService,
+    NoopModuleSource, RequestId, ScriptId, ScriptSandbox, SdkCallCx, Services,
+};
+use serde_json::{json, Value};
+use tokio::sync::Mutex;
+use uuid::Uuid;
+
+#[derive(Default)]
+struct InMemoryFiles {
+    #[allow(clippy::type_complexity)]
+    data: Mutex<BTreeMap<(AppId, String, Uuid), (FileMeta, Vec<u8>)>>,
+}
+
+/// The in-memory fake doesn't exercise the real checksum path (the
+/// `FsFilesRepo` tempdir tests in manager-core cover SHA-256); a stable
+/// placeholder keeps the metadata map non-empty.
+fn fake_checksum(bytes: &[u8]) -> String {
+    format!("len-{}", bytes.len())
+}
+
+#[async_trait]
+impl FilesService for InMemoryFiles {
+    async fn create(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        new: NewFile,
+    ) -> Result<Uuid, FilesError> {
+        if collection.is_empty() {
+            return Err(FilesError::InvalidCollection("empty".into()));
+        }
+        new.validate(100 * 1024 * 1024)?;
+        let id = Uuid::new_v4();
+        let now = chrono::Utc::now();
+        let meta = FileMeta {
+            id,
+            collection: collection.to_string(),
+            name: new.name.clone(),
+            content_type: new.content_type.clone(),
+            size: new.data.len() as u64,
+            checksum: fake_checksum(&new.data),
+            created_at: now,
+            updated_at: now,
+        };
+        self.data
+            .lock()
+            .await
+            .insert((cx.app_id, collection.to_string(), id), (meta, new.data));
+        Ok(id)
+    }
+
+    async fn head(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+    ) -> Result<Option<FileMeta>, FilesError> {
+        let Ok(uuid) = Uuid::parse_str(id) else {
+            return Ok(None);
+        };
+        Ok(self
+            .data
+            .lock()
+            .await
+            .get(&(cx.app_id, collection.to_string(), uuid))
+            .map(|(m, _)| m.clone()))
+    }
+
+    async fn get(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+    ) -> Result<Option<Vec<u8>>, FilesError> {
+        let Ok(uuid) = Uuid::parse_str(id) else {
+            return Ok(None);
+        };
+        Ok(self
+            .data
+            .lock()
+            .await
+            .get(&(cx.app_id, collection.to_string(), uuid))
+            .map(|(_, b)| b.clone()))
+    }
+
+    async fn update(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+        upd: FileUpdate,
+    ) -> Result<(), FilesError> {
+        upd.validate(100 * 1024 * 1024)?;
+        let Ok(uuid) = Uuid::parse_str(id) else {
+            return Err(FilesError::NotFound);
+        };
+        let mut data = self.data.lock().await;
+        let key = (cx.app_id, collection.to_string(), uuid);
+        let Some((meta, _)) = data.get(&key).cloned() else {
+            return Err(FilesError::NotFound);
+        };
+        let mut meta = meta;
+        if let Some(n) = upd.name {
+            meta.name = n;
+        }
+        if let Some(ct) = upd.content_type {
+            meta.content_type = ct;
+        }
+        meta.size = upd.data.len() as u64;
+        meta.checksum = fake_checksum(&upd.data);
+        data.insert(key, (meta, upd.data));
+        Ok(())
+    }
+
+    async fn delete(&self, cx: &SdkCallCx, collection: &str, id: &str) -> Result<bool, FilesError> {
+        let Ok(uuid) = Uuid::parse_str(id) else {
+            return Ok(false);
+        };
+        Ok(self
+            .data
+            .lock()
+            .await
+            .remove(&(cx.app_id, collection.to_string(), uuid))
+            .is_some())
+    }
+
+    async fn list(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        _cursor: Option<&str>,
+        _limit: u32,
+    ) -> Result<FilesListPage, FilesError> {
+        let data = self.data.lock().await;
+        let files: Vec<FileMeta> = data
+            .iter()
+            .filter(|((a, c, _), _)| *a == cx.app_id && c == collection)
+            .map(|(_, (m, _))| m.clone())
+            .collect();
+        Ok(FilesListPage {
+            files,
+            next_cursor: None,
+        })
+    }
+}
+
+fn make_engine() -> Arc<Engine> {
+    let services = Services::new(
+        Arc::new(NoopKvService),
+        Arc::new(NoopDocsService),
+        Arc::new(NoopDeadLetterService),
+        Arc::new(NoopEventEmitter),
+        Arc::new(NoopModuleSource),
+        Arc::new(NoopHttpService),
+        Arc::new(InMemoryFiles::default()),
+    );
+    Arc::new(Engine::new(Limits::default(), services))
+}
+
+fn baseline_request(app_id: AppId) -> ExecRequest {
+    let execution_id = ExecutionId::new();
+    ExecRequest {
+        execution_id,
+        request_id: RequestId::new(),
+        script_id: ScriptId::new(),
+        script_name: "files-test".into(),
+        invocation_type: InvocationType::Http,
+        path: "/files-test".into(),
+        headers: BTreeMap::new(),
+        body: Value::Null,
+        params: BTreeMap::new(),
+        query: BTreeMap::new(),
+        rest: String::new(),
+        sandbox_overrides: ScriptSandbox::default(),
+        app_id,
+        principal: None,
+        trigger_depth: 0,
+        root_execution_id: execution_id,
+        is_dead_letter_handler: false,
+        event: None,
+    }
+}
+
+async fn run_script(engine: Arc<Engine>, src: &str, req: ExecRequest) -> Value {
+    let src = src.to_string();
+    tokio::task::spawn_blocking(move || engine.execute(&src, req))
+        .await
+        .expect("spawn_blocking should not panic")
+        .expect("script execution should succeed")
+        .body
+}
+
+async fn run_script_err(engine: Arc<Engine>, src: &str, req: ExecRequest) -> String {
+    let src = src.to_string();
+    let res = tokio::task::spawn_blocking(move || engine.execute(&src, req))
+        .await
+        .expect("spawn_blocking should not panic");
+    format!("{:?}", res.expect_err("script should error"))
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn files_create_get_round_trip_via_blob() {
+    let engine = make_engine();
+    let app = AppId::new();
+    // base64("hello") = "aGVsbG8="; decode → blob; create; get back; encode.
+    let src = r#"
+        let c = files::collection("avatars");
+        let data = base64::decode("aGVsbG8=");
+        let id = c.create(#{ name: "a.txt", content_type: "text/plain", data: data });
+        let back = c.get(id);
+        base64::encode(back)
+    "#;
+    let body = run_script(engine, src, baseline_request(app)).await;
+    assert_eq!(body, json!("aGVsbG8="));
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn files_head_returns_metadata_map() {
+    let engine = make_engine();
+    let app = AppId::new();
+    let src = r#"
+        let c = files::collection("avatars");
+        let data = base64::decode("aGVsbG8=");
+        let id = c.create(#{ name: "a.txt", content_type: "text/plain", data: data });
+        let meta = c.head(id);
+        #{ name: meta.name, content_type: meta.content_type, size: meta.size, has_checksum: meta.checksum != () }
+    "#;
+    let body = run_script(engine, src, baseline_request(app)).await;
+    assert_eq!(
+        body,
+        json!({ "name": "a.txt", "content_type": "text/plain", "size": 5, "has_checksum": true })
+    );
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn files_get_and_head_missing_return_unit() {
+    let engine = make_engine();
+    let app = AppId::new();
+    let src = r#"
+        let c = files::collection("avatars");
+        let g = c.get("00000000-0000-0000-0000-000000000000");
+        let h = c.head("00000000-0000-0000-0000-000000000000");
+        #{ g: g == (), h: h == () }
+    "#;
+    let body = run_script(engine, src, baseline_request(app)).await;
+    assert_eq!(body, json!({ "g": true, "h": true }));
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn files_update_then_delete() {
+    let engine = make_engine();
+    let app = AppId::new();
+    let src = r#"
+        let c = files::collection("avatars");
+        let id = c.create(#{ name: "a", content_type: "text/plain", data: base64::decode("YQ==") });
+        c.update(id, #{ data: base64::decode("YmM=") });   // "bc"
+        let after = base64::encode(c.get(id));
+        let removed = c.delete(id);
+        let gone = c.delete(id);
+        #{ after: after, removed: removed, gone: gone }
+    "#;
+    let body = run_script(engine, src, baseline_request(app)).await;
+    assert_eq!(
+        body,
+        json!({ "after": "YmM=", "removed": true, "gone": false })
+    );
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn files_create_missing_data_throws_naming_field() {
+    let engine = make_engine();
+    let app = AppId::new();
+    let src = r#"
+        let c = files::collection("avatars");
+        c.create(#{ name: "a", content_type: "text/plain" })
+    "#;
+    let err = run_script_err(engine, src, baseline_request(app)).await;
+    assert!(
+        err.contains("data"),
+        "error should name the missing field: {err}"
+    );
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn files_create_missing_name_throws_naming_field() {
+    let engine = make_engine();
+    let app = AppId::new();
+    let src = r#"
+        let c = files::collection("avatars");
+        c.create(#{ content_type: "text/plain", data: base64::decode("YQ==") })
+    "#;
+    let err = run_script_err(engine, src, baseline_request(app)).await;
+    assert!(
+        err.contains("name"),
+        "error should name the missing field: {err}"
+    );
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn files_empty_collection_name_throws() {
+    let engine = make_engine();
+    let app = AppId::new();
+    let err = run_script_err(engine, r#"files::collection("")"#, baseline_request(app)).await;
+    assert!(err.to_lowercase().contains("empty"), "got {err}");
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn files_list_returns_files_array() {
+    let engine = make_engine();
+    let app = AppId::new();
+    let src = r#"
+        let c = files::collection("avatars");
+        c.create(#{ name: "a", content_type: "text/plain", data: base64::decode("YQ==") });
+        c.create(#{ name: "b", content_type: "text/plain", data: base64::decode("Yg==") });
+        let page = c.list();
+        page.files.len()
+    "#;
+    let body = run_script(engine, src, baseline_request(app)).await;
+    assert_eq!(body, json!(2));
+}

crates/executor-core/tests/sdk_http.rs

@@ -88,6 +88,7 @@ fn engine_with(http: Arc<dyn HttpService>) -> Arc<Engine> {
         Arc::new(NoopEventEmitter),
         Arc::new(NoopModuleSource),
         http,
+        Arc::new(picloud_shared::NoopFilesService),
     );
     Arc::new(Engine::new(Limits::default(), services))
 }

crates/executor-core/tests/sdk_kv.rs

@@ -107,6 +107,7 @@ fn make_engine() -> Arc<Engine> {
         Arc::new(NoopEventEmitter),
         Arc::new(NoopModuleSource),
         Arc::new(NoopHttpService),
+        Arc::new(picloud_shared::NoopFilesService),
     );
     Arc::new(Engine::new(Limits::default(), services))
 }

crates/manager-core/migrations/0018_files.sql

@@ -0,0 +1,25 @@
+-- v1.1.5: filesystem-backed blob storage. The row holds metadata +
+-- the SHA-256 checksum; the blob bytes live on disk at
+--   <PICLOUD_FILES_ROOT>/files/<app_id>/<collection>/<id[0:2]>/<id>
+-- (never in Postgres). Identity tuple is (app_id, collection, id) per
+-- docs/sdk-shape.md, matching KV/docs collection scoping.
+--
+-- The checksum is computed in a single pass during the atomic write and
+-- re-verified on read (FilesError::Corrupted on mismatch). Per-app
+-- quotas are deferred to v1.2; only the per-file size cap is enforced
+-- (in the service, not the schema).
+CREATE TABLE files (
+    app_id          UUID NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
+    collection      TEXT NOT NULL,
+    id              UUID NOT NULL,
+    name            TEXT NOT NULL,
+    content_type    TEXT NOT NULL,
+    size_bytes      BIGINT NOT NULL,
+    checksum_sha256 TEXT NOT NULL,           -- hex, 64 chars, lowercase
+    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    PRIMARY KEY (app_id, collection, id)
+);
+
+-- List + cursor pagination scans by (app_id, collection).
+CREATE INDEX idx_files_app_collection ON files (app_id, collection);

crates/manager-core/migrations/0019_files_triggers.sql

@@ -0,0 +1,29 @@
+-- v1.1.5: extend the triggers framework to recognise `files` as the
+-- fifth concrete kind (after `kv`/`dead_letter` v1.1.1, `docs` v1.1.2,
+-- `cron` v1.1.4). Mirrors the 0014/0017 extensions exactly: two CHECK
+-- constraints widen (strictly gaining `'files'`), one new detail table.
+--
+-- Files rows route through the SAME generic dispatcher path as the
+-- other event kinds (single match-arm extension on the Rust side). The
+-- only new machinery is the FilesServiceImpl emitting ServiceEvents
+-- that the OutboxEventEmitter fans out — identical to KV/docs.
+
+-- Extend triggers.kind to include 'files'. No existing row carries a
+-- value outside the widened set, so the drop+add is safe.
+ALTER TABLE triggers DROP CONSTRAINT triggers_kind_check;
+ALTER TABLE triggers ADD CONSTRAINT triggers_kind_check
+    CHECK (kind IN ('kv', 'dead_letter', 'docs', 'cron', 'files'));
+
+-- Extend outbox.source_kind to include 'files'.
+ALTER TABLE outbox DROP CONSTRAINT outbox_source_kind_check;
+ALTER TABLE outbox ADD CONSTRAINT outbox_source_kind_check
+    CHECK (source_kind IN ('http', 'kv', 'dead_letter', 'docs', 'cron', 'files'));
+
+-- One row per files trigger. Mirrors kv_trigger_details:
+--   collection_glob — "*", "exact", or "prefix*"
+--   ops             — subset of {create, update, delete}, empty = any
+CREATE TABLE files_trigger_details (
+    trigger_id        UUID PRIMARY KEY REFERENCES triggers(id) ON DELETE CASCADE,
+    collection_glob   TEXT NOT NULL,
+    ops               TEXT[] NOT NULL
+);

crates/manager-core/src/authz.rs

@@ -78,6 +78,17 @@ pub enum Capability {
     /// so the conservative write mapping is correct. Splitting
     /// read/write is a v1.2+ refinement. Granted to `editor`+.
     AppHttpRequest(AppId),
+    /// Read blobs from this app's files store (v1.1.5). Same trust
+    /// shape as KV/docs read — granted to `viewer`+, maps to
+    /// `script:read` on API keys. Honors the seven-scope commitment.
+    AppFilesRead(AppId),
+    /// Write blobs to this app's files store (v1.1.5). Granted to
+    /// `editor`+, maps to `script:write` on API keys.
+    AppFilesWrite(AppId),
+    /// Publish a durable pub/sub message from a script in this app
+    /// (v1.1.5). Maps to `script:write` on API keys (a publish is a
+    /// write that fans out to subscribers). Granted to `editor`+.
+    AppPubsubPublish(AppId),
     /// Create / list / delete triggers for this app (v1.1.1). Maps to
     /// `app:admin` on API keys — triggers are app-configuration acts
     /// rather than data-plane access. Granted to `app_admin`+.
@@ -108,6 +119,9 @@ impl Capability {
             | Self::AppDocsRead(id)
             | Self::AppDocsWrite(id)
             | Self::AppHttpRequest(id)
+            | Self::AppFilesRead(id)
+            | Self::AppFilesWrite(id)
+            | Self::AppPubsubPublish(id)
             | Self::AppManageTriggers(id)
             | Self::AppDeadLetterManage(id) => Some(id),
         }
@@ -124,11 +138,16 @@ impl Capability {
             Self::InstanceCreateApp | Self::InstanceManageUsers | Self::InstanceManageSettings => {
                 Scope::InstanceAdmin
             }
-            Self::AppRead(_) | Self::AppKvRead(_) | Self::AppDocsRead(_) => Scope::ScriptRead,
+            Self::AppRead(_)
+            | Self::AppKvRead(_)
+            | Self::AppDocsRead(_)
+            | Self::AppFilesRead(_) => Scope::ScriptRead,
             Self::AppWriteScript(_)
             | Self::AppKvWrite(_)
             | Self::AppDocsWrite(_)
-            | Self::AppHttpRequest(_) => Scope::ScriptWrite,
+            | Self::AppHttpRequest(_)
+            | Self::AppFilesWrite(_)
+            | Self::AppPubsubPublish(_) => Scope::ScriptWrite,
             Self::AppWriteRoute(_) => Scope::RouteWrite,
             Self::AppManageDomains(_) => Scope::DomainManage,
             Self::AppAdmin(_) | Self::AppManageTriggers(_) | Self::AppDeadLetterManage(_) => {
@@ -277,6 +296,7 @@ const fn role_satisfies(role: AppRole, cap: Capability) -> bool {
             | Capability::AppLogRead(_)
             | Capability::AppKvRead(_)
             | Capability::AppDocsRead(_)
+            | Capability::AppFilesRead(_)
     );
     let in_editor = in_viewer
         || matches!(
@@ -286,6 +306,8 @@ const fn role_satisfies(role: AppRole, cap: Capability) -> bool {
                 | Capability::AppKvWrite(_)
                 | Capability::AppDocsWrite(_)
                 | Capability::AppHttpRequest(_)
+                | Capability::AppFilesWrite(_)
+                | Capability::AppPubsubPublish(_)
         );
     let in_app_admin = in_editor
         || matches!(

crates/manager-core/src/dispatcher.rs

@@ -166,7 +166,8 @@ impl Dispatcher {
             OutboxSourceKind::Kv
             | OutboxSourceKind::Docs
             | OutboxSourceKind::DeadLetter
-            | OutboxSourceKind::Cron => {
+            | OutboxSourceKind::Cron
+            | OutboxSourceKind::Files => {
                 let resolved = self.resolve_trigger(&row).await?;
                 let req = match self.build_exec_request(&row, &resolved).await {
                     Ok(req) => req,

crates/manager-core/src/files_api.rs

@@ -0,0 +1,215 @@
+//! `/api/v1/admin/apps/{id}/files*` — minimal files admin endpoints
+//! backing the dashboard's files view (v1.1.5).
+//!
+//! Two operations only, both operator-facing:
+//!   * `GET  /apps/{id}/files?collection=<c>&cursor=&limit=` — list file
+//!     metadata for a collection (cursor-paginated).
+//!   * `DELETE /apps/{id}/files/{collection}/{file_id}` — remove a file.
+//!
+//! These talk to the `FilesRepo` directly (like `triggers_api` talks to
+//! `TriggerRepo`), guarded by the same capability model as the SDK
+//! (`AppFilesRead` / `AppFilesWrite`). **Admin deletes do NOT emit a
+//! `files:delete` trigger event** — they're operator cleanup actions,
+//! not script mutations (see HANDBACK §7). The capability binds to the
+//! resource's `app_id` after the app is loaded.
+
+use std::sync::Arc;
+
+use axum::extract::{Path, Query, State};
+use axum::http::StatusCode;
+use axum::response::{IntoResponse, Json, Response};
+use axum::routing::{delete, get};
+use axum::{Extension, Router};
+use picloud_shared::{AppId, Principal};
+use serde::{Deserialize, Serialize};
+use serde_json::json;
+use uuid::Uuid;
+
+use crate::app_repo::AppRepository;
+use crate::authz::{require, AuthzDenied, AuthzError, AuthzRepo, Capability};
+use crate::files_repo::{FilesRepo, FilesRepoError};
+
+#[derive(Clone)]
+pub struct FilesAdminState {
+    pub files: Arc<dyn FilesRepo>,
+    pub apps: Arc<dyn AppRepository>,
+    pub authz: Arc<dyn AuthzRepo>,
+}
+
+pub fn files_admin_router(state: FilesAdminState) -> Router {
+    Router::new()
+        .route("/apps/{app_id}/files", get(list_files))
+        .route(
+            "/apps/{app_id}/files/{collection}/{file_id}",
+            delete(delete_file),
+        )
+        .with_state(state)
+}
+
+#[derive(Debug, Deserialize)]
+pub struct ListFilesQuery {
+    pub collection: String,
+    #[serde(default)]
+    pub cursor: Option<String>,
+    #[serde(default)]
+    pub limit: Option<u32>,
+}
+
+#[derive(Debug, Serialize)]
+struct FileMetaDto {
+    id: String,
+    collection: String,
+    name: String,
+    content_type: String,
+    size: u64,
+    checksum: String,
+    created_at: String,
+    updated_at: String,
+}
+
+#[derive(Debug, Serialize)]
+struct ListFilesResponse {
+    files: Vec<FileMetaDto>,
+    next_cursor: Option<String>,
+}
+
+async fn list_files(
+    State(s): State<FilesAdminState>,
+    Extension(principal): Extension<Principal>,
+    Path(app_id): Path<AppId>,
+    Query(q): Query<ListFilesQuery>,
+) -> Result<Json<ListFilesResponse>, FilesApiError> {
+    ensure_app_exists(&*s.apps, app_id).await?;
+    require(
+        s.authz.as_ref(),
+        &principal,
+        Capability::AppFilesRead(app_id),
+    )
+    .await?;
+    if q.collection.trim().is_empty() {
+        return Err(FilesApiError::Invalid(
+            "collection must not be empty".into(),
+        ));
+    }
+    let page = s
+        .files
+        .list(
+            app_id,
+            &q.collection,
+            q.cursor.as_deref(),
+            q.limit.unwrap_or(0),
+        )
+        .await?;
+    let files = page
+        .files
+        .into_iter()
+        .map(|m| FileMetaDto {
+            id: m.id.to_string(),
+            collection: m.collection,
+            name: m.name,
+            content_type: m.content_type,
+            size: m.size,
+            checksum: m.checksum,
+            created_at: m.created_at.to_rfc3339(),
+            updated_at: m.updated_at.to_rfc3339(),
+        })
+        .collect();
+    Ok(Json(ListFilesResponse {
+        files,
+        next_cursor: page.next_cursor,
+    }))
+}
+
+async fn delete_file(
+    State(s): State<FilesAdminState>,
+    Extension(principal): Extension<Principal>,
+    Path((app_id, collection, file_id)): Path<(AppId, String, String)>,
+) -> Result<StatusCode, FilesApiError> {
+    ensure_app_exists(&*s.apps, app_id).await?;
+    require(
+        s.authz.as_ref(),
+        &principal,
+        Capability::AppFilesWrite(app_id),
+    )
+    .await?;
+    let id = Uuid::parse_str(&file_id).map_err(|_| FilesApiError::NotFound)?;
+    if s.files.delete(app_id, &collection, id).await?.is_none() {
+        return Err(FilesApiError::NotFound);
+    }
+    Ok(StatusCode::NO_CONTENT)
+}
+
+async fn ensure_app_exists(apps: &dyn AppRepository, app_id: AppId) -> Result<(), FilesApiError> {
+    apps.get_by_id(app_id)
+        .await
+        .map_err(|e| FilesApiError::Backend(e.to_string()))?
+        .ok_or(FilesApiError::AppNotFound)?;
+    Ok(())
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum FilesApiError {
+    #[error("app not found")]
+    AppNotFound,
+    #[error("file not found")]
+    NotFound,
+    #[error("invalid request: {0}")]
+    Invalid(String),
+    #[error("forbidden")]
+    Forbidden,
+    #[error("authorization repo error: {0}")]
+    AuthzRepo(String),
+    #[error("files backend: {0}")]
+    Backend(String),
+}
+
+impl From<AuthzDenied> for FilesApiError {
+    fn from(d: AuthzDenied) -> Self {
+        match d {
+            AuthzDenied::Denied => Self::Forbidden,
+            AuthzDenied::Repo(e) => Self::AuthzRepo(e.to_string()),
+        }
+    }
+}
+
+impl From<AuthzError> for FilesApiError {
+    fn from(e: AuthzError) -> Self {
+        Self::AuthzRepo(e.to_string())
+    }
+}
+
+impl From<FilesRepoError> for FilesApiError {
+    fn from(e: FilesRepoError) -> Self {
+        Self::Backend(e.to_string())
+    }
+}
+
+impl IntoResponse for FilesApiError {
+    fn into_response(self) -> Response {
+        let (status, body) = match &self {
+            Self::AppNotFound | Self::NotFound => {
+                (StatusCode::NOT_FOUND, json!({ "error": self.to_string() }))
+            }
+            Self::Invalid(_) => (
+                StatusCode::UNPROCESSABLE_ENTITY,
+                json!({ "error": self.to_string() }),
+            ),
+            Self::Forbidden => (StatusCode::FORBIDDEN, json!({ "error": self.to_string() })),
+            Self::AuthzRepo(e) => {
+                tracing::error!(error = %e, "files admin authz repo error");
+                (
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    json!({ "error": "internal error" }),
+                )
+            }
+            Self::Backend(e) => {
+                tracing::error!(error = %e, "files admin backend error");
+                (
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    json!({ "error": "internal error" }),
+                )
+            }
+        };
+        (status, Json(body)).into_response()
+    }
+}

crates/manager-core/src/files_repo.rs

@@ -0,0 +1,759 @@
+//! `FilesRepo` — the metadata row (Postgres) + blob bytes (filesystem)
+//! storage layer for the v1.1.5 `files::*` SDK.
+//!
+//! Unlike KV/docs, this repo owns BOTH halves of a file: the `files`
+//! row (metadata + SHA-256 checksum) and the bytes on disk at
+//!   `<root>/files/<app_id>/<collection>/<id[0:2]>/<id>`.
+//! It owns both because the write must be atomic across them — a crash
+//! mid-write must never leave a readable half-written file.
+//!
+//! ## Atomic write protocol (`create` / `update`)
+//!   1. Validate (collection path-safety; caps live one layer up).
+//!   2. `create_dir_all` the shard dir with `0o700`.
+//!   3. SHA-256 the in-memory bytes (single pass) while writing to
+//!      `<final>.tmp.<unique>`.
+//!   4. `fsync` the temp file.
+//!   5. `rename` temp → final (atomic on POSIX).
+//!   6. `fsync` the parent dir (so the rename is durable).
+//!   7. INSERT / UPDATE the DB row.
+//!
+//! A crash between 1–5 leaves an orphan `*.tmp.*` (never read). A crash
+//! between 5–7 leaves a file with no row — never reachable via the SDK
+//! (reads start from the row). Both are reclaimed by a future orphan
+//! sweep (deferred to v1.1.6+; see HANDBACK §7).
+//!
+//! ## Atomic delete protocol
+//!   1. SELECT + DELETE the row inside one transaction; commit.
+//!   2. `unlink` the file (outside the tx). A failure here leaves an
+//!      orphan; a failure before the commit changes nothing.
+//!
+//! ## Checksum-on-read
+//! `get` reads the file, hashes it, and compares against the stored
+//! checksum — returning `FilesError::Corrupted` (and logging the path
+//! at error level) on a mismatch. It never auto-deletes; the operator
+//! decides what to do with a metadata-vs-bytes divergence.
+
+use std::env;
+use std::path::{Path, PathBuf};
+use std::sync::atomic::{AtomicU64, Ordering};
+
+use async_trait::async_trait;
+use base64::engine::general_purpose::URL_SAFE_NO_PAD;
+use base64::Engine as _;
+use chrono::{DateTime, Utc};
+use picloud_shared::{AppId, FileMeta, FileUpdate, FilesListPage, NewFile};
+use sha2::{Digest, Sha256};
+use sqlx::PgPool;
+use uuid::Uuid;
+
+/// 100 MB default per-file cap.
+pub const DEFAULT_MAX_FILE_SIZE_BYTES: usize = 100 * 1024 * 1024;
+/// Default filesystem root (relative to the process CWD).
+pub const DEFAULT_FILES_ROOT: &str = "./data";
+
+const FILES_LIST_MAX_LIMIT: u32 = 1_000;
+const FILES_LIST_DEFAULT_LIMIT: u32 = 100;
+
+/// Monotonic counter feeding unique temp-file suffixes (combined with
+/// the pid). Avoids `rand` in the storage layer per the brief.
+static TMP_COUNTER: AtomicU64 = AtomicU64::new(0);
+
+#[derive(Debug, thiserror::Error)]
+pub enum FilesRepoError {
+    #[error("database error: {0}")]
+    Db(#[from] sqlx::Error),
+
+    #[error("filesystem error: {0}")]
+    Io(String),
+
+    #[error("invalid collection name: {0}")]
+    InvalidCollection(String),
+
+    /// The bytes on disk no longer match the stored checksum (or are
+    /// missing entirely while the row persists).
+    #[error("file content corrupted (checksum mismatch)")]
+    Corrupted,
+
+    #[error("invalid pagination cursor")]
+    InvalidCursor,
+}
+
+/// Outbound-files tunables. Env-overridable following the same pattern
+/// as `HttpConfig::from_env`.
+#[derive(Debug, Clone)]
+pub struct FilesConfig {
+    pub root: PathBuf,
+    pub max_file_size_bytes: usize,
+}
+
+impl FilesConfig {
+    #[must_use]
+    pub fn conservative() -> Self {
+        Self {
+            root: PathBuf::from(DEFAULT_FILES_ROOT),
+            max_file_size_bytes: DEFAULT_MAX_FILE_SIZE_BYTES,
+        }
+    }
+
+    #[must_use]
+    pub fn from_env() -> Self {
+        let mut c = Self::conservative();
+        if let Ok(v) = env::var("PICLOUD_FILES_ROOT") {
+            if !v.trim().is_empty() {
+                c.root = PathBuf::from(v);
+            }
+        }
+        if let Ok(v) = env::var("PICLOUD_FILES_MAX_FILE_SIZE_BYTES") {
+            match v.parse::<usize>() {
+                Ok(n) => c.max_file_size_bytes = n,
+                Err(e) => {
+                    tracing::warn!(error = %e, "ignoring invalid PICLOUD_FILES_MAX_FILE_SIZE_BYTES");
+                }
+            }
+        }
+        c
+    }
+}
+
+impl Default for FilesConfig {
+    fn default() -> Self {
+        Self::conservative()
+    }
+}
+
+/// The new+prior metadata returned from a successful `update`, so the
+/// service can emit a `ServiceEvent` with the change-data-capture
+/// surface (`old_payload`).
+#[derive(Debug, Clone)]
+pub struct FileUpdated {
+    pub new: FileMeta,
+    pub prev: FileMeta,
+}
+
+#[async_trait]
+pub trait FilesRepo: Send + Sync {
+    async fn create(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        new: NewFile,
+    ) -> Result<FileMeta, FilesRepoError>;
+
+    async fn head(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+    ) -> Result<Option<FileMeta>, FilesRepoError>;
+
+    /// Reads + checksum-verifies the bytes. `Ok(None)` when no row
+    /// exists; `Err(Corrupted)` when the row exists but the bytes are
+    /// missing or mismatched.
+    async fn get(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+    ) -> Result<Option<Vec<u8>>, FilesRepoError>;
+
+    /// `Ok(None)` when no row exists (the SDK turns this into
+    /// `FilesError::NotFound`).
+    async fn update(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+        upd: FileUpdate,
+    ) -> Result<Option<FileUpdated>, FilesRepoError>;
+
+    /// Returns the deleted row's metadata if present, `None` otherwise.
+    async fn delete(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+    ) -> Result<Option<FileMeta>, FilesRepoError>;
+
+    async fn list(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        cursor: Option<&str>,
+        limit: u32,
+    ) -> Result<FilesListPage, FilesRepoError>;
+}
+
+/// Filesystem-bytes + Postgres-metadata repo.
+pub struct FsFilesRepo {
+    pool: PgPool,
+    config: FilesConfig,
+}
+
+impl FsFilesRepo {
+    #[must_use]
+    pub fn new(pool: PgPool, config: FilesConfig) -> Self {
+        Self { pool, config }
+    }
+
+    /// Defensive path-component guard. The service already validates the
+    /// collection at the SDK boundary; this is belt-and-suspenders so a
+    /// future caller can't smuggle a traversal sequence onto disk.
+    fn guard_collection(collection: &str) -> Result<(), FilesRepoError> {
+        if collection.is_empty()
+            || collection.contains('/')
+            || collection.contains('\\')
+            || collection.contains("..")
+            || collection.contains('\0')
+        {
+            return Err(FilesRepoError::InvalidCollection(collection.to_string()));
+        }
+        Ok(())
+    }
+
+    fn final_path(&self, app_id: AppId, collection: &str, id: Uuid) -> PathBuf {
+        final_path_at(&self.config.root, app_id, collection, id)
+    }
+
+    fn write_atomic(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+        bytes: &[u8],
+    ) -> Result<String, FilesRepoError> {
+        write_atomic_at(&self.config.root, app_id, collection, id, bytes)
+    }
+}
+
+fn shard_dir_at(root: &Path, app_id: AppId, collection: &str, id_str: &str) -> PathBuf {
+    root.join("files")
+        .join(app_id.into_inner().to_string())
+        .join(collection)
+        .join(&id_str[..2])
+}
+
+fn final_path_at(root: &Path, app_id: AppId, collection: &str, id: Uuid) -> PathBuf {
+    let id_str = id.to_string();
+    shard_dir_at(root, app_id, collection, &id_str).join(&id_str)
+}
+
+/// Steps 2–6 of the atomic-write protocol. Returns the lowercase hex
+/// SHA-256 of the bytes (computed in a single pass over the in-memory
+/// buffer — the file is never re-read). Free function so the fs
+/// mechanics are unit-testable without a Postgres pool.
+fn write_atomic_at(
+    root: &Path,
+    app_id: AppId,
+    collection: &str,
+    id: Uuid,
+    bytes: &[u8],
+) -> Result<String, FilesRepoError> {
+    use std::io::Write as _;
+
+    let id_str = id.to_string();
+    let dir = shard_dir_at(root, app_id, collection, &id_str);
+    create_dir_all_secure(&dir)?;
+
+    // Single-pass checksum over the in-memory buffer.
+    let mut hasher = Sha256::new();
+    hasher.update(bytes);
+    let checksum = hex_lower(&hasher.finalize());
+
+    let seq = TMP_COUNTER.fetch_add(1, Ordering::Relaxed);
+    let tmp = dir.join(format!("{id_str}.tmp.{}-{seq}", std::process::id()));
+    let final_path = dir.join(&id_str);
+
+    {
+        let mut f = std::fs::File::create(&tmp).map_err(io_err)?;
+        f.write_all(bytes).map_err(io_err)?;
+        f.sync_all().map_err(io_err)?; // fsync temp
+    }
+    std::fs::rename(&tmp, &final_path).map_err(io_err)?; // atomic
+                                                         // fsync the parent dir so the rename is durable.
+    if let Ok(dirf) = std::fs::File::open(&dir) {
+        let _ = dirf.sync_all();
+    }
+    Ok(checksum)
+}
+
+/// Read + checksum-verify the bytes at the given path-set. Free
+/// function mirror of the `get` read path. Returns `Corrupted` when the
+/// bytes are missing or don't match `expected_checksum`.
+fn read_verify_at(
+    root: &Path,
+    app_id: AppId,
+    collection: &str,
+    id: Uuid,
+    expected_checksum: &str,
+) -> Result<Vec<u8>, FilesRepoError> {
+    let path = final_path_at(root, app_id, collection, id);
+    let bytes = match std::fs::read(&path) {
+        Ok(b) => b,
+        Err(e) => {
+            tracing::error!(
+                path = %path.display(), error = %e,
+                "files: row exists but bytes are unreadable — treating as corrupted"
+            );
+            return Err(FilesRepoError::Corrupted);
+        }
+    };
+    let mut hasher = Sha256::new();
+    hasher.update(&bytes);
+    let actual = hex_lower(&hasher.finalize());
+    if actual != expected_checksum {
+        tracing::error!(
+            path = %path.display(), expected = %expected_checksum, actual = %actual,
+            "files: checksum mismatch on read — content corrupted"
+        );
+        return Err(FilesRepoError::Corrupted);
+    }
+    Ok(bytes)
+}
+
+#[async_trait]
+impl FilesRepo for FsFilesRepo {
+    async fn create(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        new: NewFile,
+    ) -> Result<FileMeta, FilesRepoError> {
+        Self::guard_collection(collection)?;
+        let id = Uuid::new_v4();
+        let size = i64::try_from(new.data.len()).unwrap_or(i64::MAX);
+
+        let checksum = self.write_atomic(app_id, collection, id, &new.data)?;
+
+        let row: FileRow = sqlx::query_as(
+            "INSERT INTO files \
+                (app_id, collection, id, name, content_type, size_bytes, checksum_sha256) \
+             VALUES ($1, $2, $3, $4, $5, $6, $7) \
+             RETURNING id, collection, name, content_type, size_bytes, \
+                       checksum_sha256, created_at, updated_at",
+        )
+        .bind(app_id.into_inner())
+        .bind(collection)
+        .bind(id)
+        .bind(&new.name)
+        .bind(&new.content_type)
+        .bind(size)
+        .bind(&checksum)
+        .fetch_one(&self.pool)
+        .await?;
+
+        Ok(row.into_meta())
+    }
+
+    async fn head(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+    ) -> Result<Option<FileMeta>, FilesRepoError> {
+        let row: Option<FileRow> = sqlx::query_as(
+            "SELECT id, collection, name, content_type, size_bytes, \
+                    checksum_sha256, created_at, updated_at \
+             FROM files WHERE app_id = $1 AND collection = $2 AND id = $3",
+        )
+        .bind(app_id.into_inner())
+        .bind(collection)
+        .bind(id)
+        .fetch_optional(&self.pool)
+        .await?;
+        Ok(row.map(FileRow::into_meta))
+    }
+
+    async fn get(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+    ) -> Result<Option<Vec<u8>>, FilesRepoError> {
+        let row: Option<(String,)> = sqlx::query_as(
+            "SELECT checksum_sha256 FROM files \
+             WHERE app_id = $1 AND collection = $2 AND id = $3",
+        )
+        .bind(app_id.into_inner())
+        .bind(collection)
+        .bind(id)
+        .fetch_optional(&self.pool)
+        .await?;
+        let Some((stored_checksum,)) = row else {
+            return Ok(None);
+        };
+        let bytes = read_verify_at(&self.config.root, app_id, collection, id, &stored_checksum)?;
+        Ok(Some(bytes))
+    }
+
+    async fn update(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+        upd: FileUpdate,
+    ) -> Result<Option<FileUpdated>, FilesRepoError> {
+        Self::guard_collection(collection)?;
+        // Read the prior row first (existence check + CDC surface).
+        let Some(prev) = self.head(app_id, collection, id).await? else {
+            return Ok(None);
+        };
+
+        let size = i64::try_from(upd.data.len()).unwrap_or(i64::MAX);
+        let checksum = self.write_atomic(app_id, collection, id, &upd.data)?;
+
+        let row: FileRow = sqlx::query_as(
+            "UPDATE files SET \
+                name = COALESCE($4, name), \
+                content_type = COALESCE($5, content_type), \
+                size_bytes = $6, \
+                checksum_sha256 = $7, \
+                updated_at = NOW() \
+             WHERE app_id = $1 AND collection = $2 AND id = $3 \
+             RETURNING id, collection, name, content_type, size_bytes, \
+                       checksum_sha256, created_at, updated_at",
+        )
+        .bind(app_id.into_inner())
+        .bind(collection)
+        .bind(id)
+        .bind(upd.name.as_deref())
+        .bind(upd.content_type.as_deref())
+        .bind(size)
+        .bind(&checksum)
+        .fetch_one(&self.pool)
+        .await?;
+
+        Ok(Some(FileUpdated {
+            new: row.into_meta(),
+            prev,
+        }))
+    }
+
+    async fn delete(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        id: Uuid,
+    ) -> Result<Option<FileMeta>, FilesRepoError> {
+        // SELECT + DELETE in one tx; unlink afterwards (outside the tx).
+        let mut tx = self.pool.begin().await?;
+        let row: Option<FileRow> = sqlx::query_as(
+            "SELECT id, collection, name, content_type, size_bytes, \
+                    checksum_sha256, created_at, updated_at \
+             FROM files WHERE app_id = $1 AND collection = $2 AND id = $3 \
+             FOR UPDATE",
+        )
+        .bind(app_id.into_inner())
+        .bind(collection)
+        .bind(id)
+        .fetch_optional(&mut *tx)
+        .await?;
+
+        let Some(row) = row else {
+            tx.rollback().await?;
+            return Ok(None);
+        };
+
+        sqlx::query("DELETE FROM files WHERE app_id = $1 AND collection = $2 AND id = $3")
+            .bind(app_id.into_inner())
+            .bind(collection)
+            .bind(id)
+            .execute(&mut *tx)
+            .await?;
+        tx.commit().await?;
+
+        // Row is gone; unlink the bytes. A failure here leaves an orphan
+        // file (reclaimed by a future sweep) — not fatal.
+        let path = self.final_path(app_id, collection, id);
+        if let Err(e) = std::fs::remove_file(&path) {
+            if e.kind() != std::io::ErrorKind::NotFound {
+                tracing::warn!(path = %path.display(), error = %e, "files: unlink after delete failed (orphan)");
+            }
+        }
+        Ok(Some(row.into_meta()))
+    }
+
+    async fn list(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        cursor: Option<&str>,
+        limit: u32,
+    ) -> Result<FilesListPage, FilesRepoError> {
+        let limit = if limit == 0 {
+            FILES_LIST_DEFAULT_LIMIT
+        } else {
+            limit.min(FILES_LIST_MAX_LIMIT)
+        };
+        let last_id = match cursor {
+            Some(c) => Some(decode_cursor(c)?),
+            None => None,
+        };
+        let take = i64::from(limit) + 1;
+        let rows: Vec<FileRow> = sqlx::query_as(
+            "SELECT id, collection, name, content_type, size_bytes, \
+                    checksum_sha256, created_at, updated_at \
+             FROM files \
+             WHERE app_id = $1 AND collection = $2 \
+               AND ($3::uuid IS NULL OR id > $3) \
+             ORDER BY id ASC \
+             LIMIT $4",
+        )
+        .bind(app_id.into_inner())
+        .bind(collection)
+        .bind(last_id)
+        .bind(take)
+        .fetch_all(&self.pool)
+        .await?;
+
+        let mut files: Vec<FileMeta> = rows.into_iter().map(FileRow::into_meta).collect();
+        let next_cursor = if files.len() > limit as usize {
+            files.truncate(limit as usize);
+            files.last().map(|m| encode_cursor(m.id))
+        } else {
+            None
+        };
+        Ok(FilesListPage { files, next_cursor })
+    }
+}
+
+// ----------------------------------------------------------------------------
+// Helpers
+// ----------------------------------------------------------------------------
+
+fn io_err(e: std::io::Error) -> FilesRepoError {
+    FilesRepoError::Io(e.to_string())
+}
+
+/// `create_dir_all` with `0o700` on the created tree (Unix). On other
+/// platforms it falls back to the default permissions.
+fn create_dir_all_secure(dir: &Path) -> Result<(), FilesRepoError> {
+    #[cfg(unix)]
+    {
+        use std::os::unix::fs::DirBuilderExt as _;
+        std::fs::DirBuilder::new()
+            .recursive(true)
+            .mode(0o700)
+            .create(dir)
+            .map_err(io_err)
+    }
+    #[cfg(not(unix))]
+    {
+        std::fs::create_dir_all(dir).map_err(io_err)
+    }
+}
+
+fn hex_lower(bytes: &[u8]) -> String {
+    let mut s = String::with_capacity(bytes.len() * 2);
+    for b in bytes {
+        use std::fmt::Write as _;
+        let _ = write!(s, "{b:02x}");
+    }
+    s
+}
+
+fn encode_cursor(last_id: Uuid) -> String {
+    URL_SAFE_NO_PAD.encode(last_id.to_string().as_bytes())
+}
+
+fn decode_cursor(cursor: &str) -> Result<Uuid, FilesRepoError> {
+    let bytes = URL_SAFE_NO_PAD
+        .decode(cursor)
+        .map_err(|_| FilesRepoError::InvalidCursor)?;
+    let s = String::from_utf8(bytes).map_err(|_| FilesRepoError::InvalidCursor)?;
+    Uuid::parse_str(&s).map_err(|_| FilesRepoError::InvalidCursor)
+}
+
+#[derive(sqlx::FromRow)]
+struct FileRow {
+    id: Uuid,
+    collection: String,
+    name: String,
+    content_type: String,
+    size_bytes: i64,
+    checksum_sha256: String,
+    created_at: DateTime<Utc>,
+    updated_at: DateTime<Utc>,
+}
+
+impl FileRow {
+    fn into_meta(self) -> FileMeta {
+        FileMeta {
+            id: self.id,
+            collection: self.collection,
+            name: self.name,
+            content_type: self.content_type,
+            size: u64::try_from(self.size_bytes).unwrap_or(0),
+            checksum: self.checksum_sha256,
+            created_at: self.created_at,
+            updated_at: self.updated_at,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn hex_lower_matches_known_sha256_vector() {
+        // SHA-256("abc") — NIST known-answer vector.
+        let mut h = Sha256::new();
+        h.update(b"abc");
+        assert_eq!(
+            hex_lower(&h.finalize()),
+            "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad"
+        );
+    }
+
+    #[test]
+    fn hex_lower_of_empty_is_known_vector() {
+        let mut h = Sha256::new();
+        h.update(b"");
+        assert_eq!(
+            hex_lower(&h.finalize()),
+            "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+        );
+    }
+
+    #[test]
+    fn cursor_round_trips() {
+        let id = Uuid::new_v4();
+        let enc = encode_cursor(id);
+        assert_eq!(decode_cursor(&enc).unwrap(), id);
+        assert!(matches!(
+            decode_cursor("!!not-base64!!"),
+            Err(FilesRepoError::InvalidCursor)
+        ));
+    }
+
+    #[test]
+    fn guard_collection_rejects_traversal() {
+        assert!(FsFilesRepo::guard_collection("avatars").is_ok());
+        assert!(FsFilesRepo::guard_collection("a/b").is_err());
+        assert!(FsFilesRepo::guard_collection("..").is_err());
+        assert!(FsFilesRepo::guard_collection("a..b").is_err());
+        assert!(FsFilesRepo::guard_collection("").is_err());
+        assert!(FsFilesRepo::guard_collection("a\0b").is_err());
+    }
+
+    #[test]
+    fn config_from_env_defaults_are_conservative() {
+        let c = FilesConfig::conservative();
+        assert_eq!(c.max_file_size_bytes, DEFAULT_MAX_FILE_SIZE_BYTES);
+        assert_eq!(c.root, PathBuf::from(DEFAULT_FILES_ROOT));
+    }
+
+    // ------------------------------------------------------------------
+    // Tempdir-backed filesystem mechanics — exercise the atomic write,
+    // single-pass checksum, and checksum-on-read tamper detection
+    // without needing a Postgres pool.
+    // ------------------------------------------------------------------
+
+    use picloud_shared::AppId;
+
+    /// Process-unique scratch dir under the system temp dir. Cleaned up
+    /// by each test via `remove_dir_all`.
+    fn unique_tmp_root() -> PathBuf {
+        let seq = TMP_COUNTER.fetch_add(1, Ordering::Relaxed);
+        let dir =
+            std::env::temp_dir().join(format!("picloud-files-test-{}-{seq}", std::process::id()));
+        std::fs::create_dir_all(&dir).unwrap();
+        dir
+    }
+
+    #[test]
+    fn write_atomic_then_read_verify_round_trips() {
+        let root = unique_tmp_root();
+        let app = AppId::new();
+        let id = Uuid::new_v4();
+        let bytes = b"hello picloud files".to_vec();
+
+        let checksum = write_atomic_at(&root, app, "avatars", id, &bytes).unwrap();
+        // Single-pass checksum matches an independent hash of the bytes.
+        let mut h = Sha256::new();
+        h.update(&bytes);
+        assert_eq!(checksum, hex_lower(&h.finalize()));
+
+        let read = read_verify_at(&root, app, "avatars", id, &checksum).unwrap();
+        assert_eq!(read, bytes);
+
+        std::fs::remove_dir_all(&root).ok();
+    }
+
+    #[test]
+    fn read_verify_detects_tampering_as_corrupted() {
+        let root = unique_tmp_root();
+        let app = AppId::new();
+        let id = Uuid::new_v4();
+        let checksum = write_atomic_at(&root, app, "c", id, b"original").unwrap();
+
+        // Mutate the bytes behind the repo's back.
+        let path = final_path_at(&root, app, "c", id);
+        std::fs::write(&path, b"tampered").unwrap();
+
+        let err = read_verify_at(&root, app, "c", id, &checksum).unwrap_err();
+        assert!(matches!(err, FilesRepoError::Corrupted));
+
+        std::fs::remove_dir_all(&root).ok();
+    }
+
+    #[test]
+    fn read_verify_missing_bytes_is_corrupted() {
+        let root = unique_tmp_root();
+        let app = AppId::new();
+        let id = Uuid::new_v4();
+        // No write — the file never existed.
+        let err = read_verify_at(&root, app, "c", id, "deadbeef").unwrap_err();
+        assert!(matches!(err, FilesRepoError::Corrupted));
+        std::fs::remove_dir_all(&root).ok();
+    }
+
+    #[test]
+    fn atomic_write_leaves_no_tmp_file_after_success() {
+        let root = unique_tmp_root();
+        let app = AppId::new();
+        let id = Uuid::new_v4();
+        write_atomic_at(&root, app, "c", id, b"data").unwrap();
+
+        let id_str = id.to_string();
+        let dir = shard_dir_at(&root, app, "c", &id_str);
+        let entries: Vec<_> = std::fs::read_dir(&dir)
+            .unwrap()
+            .filter_map(Result::ok)
+            .map(|e| e.file_name().to_string_lossy().into_owned())
+            .collect();
+        // Exactly the final file is visible — no `*.tmp.*` orphan.
+        assert_eq!(entries, vec![id_str]);
+        assert!(!entries.iter().any(|n| n.contains(".tmp.")));
+
+        std::fs::remove_dir_all(&root).ok();
+    }
+
+    #[test]
+    fn id_shard_uses_first_two_chars() {
+        let root = PathBuf::from("/tmp/x");
+        let app = AppId::new();
+        let id = Uuid::new_v4();
+        let id_str = id.to_string();
+        let path = final_path_at(&root, app, "col", id);
+        let shard = &id_str[..2];
+        assert!(path
+            .to_string_lossy()
+            .contains(&format!("/col/{shard}/{id_str}")));
+    }
+
+    #[cfg(unix)]
+    #[test]
+    fn shard_tree_created_with_0700() {
+        use std::os::unix::fs::PermissionsExt as _;
+        let root = unique_tmp_root();
+        let app = AppId::new();
+        let id = Uuid::new_v4();
+        write_atomic_at(&root, app, "c", id, b"data").unwrap();
+        let id_str = id.to_string();
+        let dir = shard_dir_at(&root, app, "c", &id_str);
+        let mode = std::fs::metadata(&dir).unwrap().permissions().mode();
+        assert_eq!(mode & 0o777, 0o700, "shard dir should be 0o700");
+        std::fs::remove_dir_all(&root).ok();
+    }
+}

crates/manager-core/src/files_service.rs

@@ -0,0 +1,817 @@
+//! `FilesServiceImpl` — wires the `FilesRepo` underneath the
+//! `picloud_shared::FilesService` trait scripts see via the Rhai
+//! bridge.
+//!
+//! Layers added here (vs the raw repo), mirroring `KvServiceImpl`:
+//!   1. Collection validation (empty + path-traversal) and field /
+//!      size-cap validation at the SDK boundary.
+//!   2. **Script-as-gate authz**: when `cx.principal.is_some()` we run
+//!      `authz::require(...)`; when it's `None` (public HTTP) we skip.
+//!      Cross-app isolation is unaffected — every repo call is keyed by
+//!      `cx.app_id`, never an argument.
+//!   3. `ServiceEvent` emission after each mutation (`create` /
+//!      `update` / `delete`). The payload is the file **metadata**, not
+//!      the blob bytes (files are too big for trigger payloads).
+
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use picloud_shared::{
+    validate_files_collection, FileMeta, FileUpdate, FilesError, FilesListPage, FilesService,
+    NewFile, SdkCallCx, ServiceEvent, ServiceEventEmitter,
+};
+use uuid::Uuid;
+
+use crate::authz::{self, AuthzRepo, Capability};
+use crate::files_repo::{FileUpdated, FilesRepo, FilesRepoError};
+
+pub struct FilesServiceImpl {
+    repo: Arc<dyn FilesRepo>,
+    authz: Arc<dyn AuthzRepo>,
+    events: Arc<dyn ServiceEventEmitter>,
+    max_file_size_bytes: usize,
+}
+
+impl FilesServiceImpl {
+    #[must_use]
+    pub fn new(
+        repo: Arc<dyn FilesRepo>,
+        authz: Arc<dyn AuthzRepo>,
+        events: Arc<dyn ServiceEventEmitter>,
+        max_file_size_bytes: usize,
+    ) -> Self {
+        Self {
+            repo,
+            authz,
+            events,
+            max_file_size_bytes,
+        }
+    }
+
+    async fn check_read(&self, cx: &SdkCallCx) -> Result<(), FilesError> {
+        if let Some(ref principal) = cx.principal {
+            authz::require(&*self.authz, principal, Capability::AppFilesRead(cx.app_id))
+                .await
+                .map_err(|_| FilesError::Forbidden)?;
+        }
+        Ok(())
+    }
+
+    async fn check_write(&self, cx: &SdkCallCx) -> Result<(), FilesError> {
+        if let Some(ref principal) = cx.principal {
+            authz::require(
+                &*self.authz,
+                principal,
+                Capability::AppFilesWrite(cx.app_id),
+            )
+            .await
+            .map_err(|_| FilesError::Forbidden)?;
+        }
+        Ok(())
+    }
+
+    /// Best-effort `ServiceEvent` emission. A failed emit is logged but
+    /// never rolls back the (already-durable) file write.
+    async fn emit(
+        &self,
+        cx: &SdkCallCx,
+        op: &'static str,
+        collection: &str,
+        meta: &FileMeta,
+        old: Option<&FileMeta>,
+    ) {
+        let payload = serde_json::to_value(meta).ok();
+        let old_payload = old.and_then(|m| serde_json::to_value(m).ok());
+        if let Err(e) = self
+            .events
+            .emit(
+                cx,
+                ServiceEvent {
+                    source: "files",
+                    op,
+                    collection: Some(collection.to_string()),
+                    key: Some(meta.id.to_string()),
+                    payload,
+                    old_payload,
+                },
+            )
+            .await
+        {
+            tracing::warn!(error = %e, source = "files", op, "event emit failed");
+        }
+    }
+}
+
+/// Parse a script-supplied id. Invalid UUIDs aren't an error shape the
+/// SDK exposes — for reads/deletes they simply mean "no such file".
+fn parse_id(id: &str) -> Option<Uuid> {
+    Uuid::parse_str(id).ok()
+}
+
+impl From<FilesRepoError> for FilesError {
+    fn from(e: FilesRepoError) -> Self {
+        match e {
+            FilesRepoError::Corrupted => Self::Corrupted,
+            FilesRepoError::InvalidCollection(c) => Self::InvalidCollection(c),
+            other => Self::Backend(other.to_string()),
+        }
+    }
+}
+
+#[async_trait]
+impl FilesService for FilesServiceImpl {
+    async fn create(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        new: NewFile,
+    ) -> Result<Uuid, FilesError> {
+        validate_files_collection(collection)?;
+        self.check_write(cx).await?;
+        new.validate(self.max_file_size_bytes)?;
+        let meta = self.repo.create(cx.app_id, collection, new).await?;
+        self.emit(cx, "create", collection, &meta, None).await;
+        Ok(meta.id)
+    }
+
+    async fn head(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+    ) -> Result<Option<FileMeta>, FilesError> {
+        validate_files_collection(collection)?;
+        self.check_read(cx).await?;
+        let Some(uuid) = parse_id(id) else {
+            return Ok(None);
+        };
+        Ok(self.repo.head(cx.app_id, collection, uuid).await?)
+    }
+
+    async fn get(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+    ) -> Result<Option<Vec<u8>>, FilesError> {
+        validate_files_collection(collection)?;
+        self.check_read(cx).await?;
+        let Some(uuid) = parse_id(id) else {
+            return Ok(None);
+        };
+        Ok(self.repo.get(cx.app_id, collection, uuid).await?)
+    }
+
+    async fn update(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+        upd: FileUpdate,
+    ) -> Result<(), FilesError> {
+        validate_files_collection(collection)?;
+        self.check_write(cx).await?;
+        upd.validate(self.max_file_size_bytes)?;
+        let Some(uuid) = parse_id(id) else {
+            return Err(FilesError::NotFound);
+        };
+        match self.repo.update(cx.app_id, collection, uuid, upd).await? {
+            Some(FileUpdated { new, prev }) => {
+                self.emit(cx, "update", collection, &new, Some(&prev)).await;
+                Ok(())
+            }
+            None => Err(FilesError::NotFound),
+        }
+    }
+
+    async fn delete(&self, cx: &SdkCallCx, collection: &str, id: &str) -> Result<bool, FilesError> {
+        validate_files_collection(collection)?;
+        self.check_write(cx).await?;
+        let Some(uuid) = parse_id(id) else {
+            return Ok(false);
+        };
+        match self.repo.delete(cx.app_id, collection, uuid).await? {
+            Some(meta) => {
+                // On delete, the top-level metadata AND `prev` both carry
+                // the deleted row (per docs/v1.1.x design + the brief).
+                self.emit(cx, "delete", collection, &meta, Some(&meta))
+                    .await;
+                Ok(true)
+            }
+            None => Ok(false),
+        }
+    }
+
+    async fn list(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        cursor: Option<&str>,
+        limit: u32,
+    ) -> Result<FilesListPage, FilesError> {
+        validate_files_collection(collection)?;
+        self.check_read(cx).await?;
+        Ok(self.repo.list(cx.app_id, collection, cursor, limit).await?)
+    }
+}
+
+// ----------------------------------------------------------------------------
+// Tests — in-memory FilesRepo so unit tests need neither Postgres nor a
+// filesystem. The on-disk atomic-write / checksum mechanics are covered
+// by the tempdir tests in `files_repo.rs`.
+// ----------------------------------------------------------------------------
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::authz::{AuthzError, AuthzRepo};
+    use async_trait::async_trait;
+    use chrono::Utc;
+    use picloud_shared::{
+        AdminUserId, AppId, AppRole, EmitError, ExecutionId, InstanceRole, Principal, RequestId,
+        ScriptId, ServiceEvent, UserId,
+    };
+    use std::collections::BTreeMap;
+    use std::sync::Mutex as StdMutex;
+    use tokio::sync::Mutex;
+
+    /// In-memory FilesRepo keyed by (app, collection, id). Stores the
+    /// metadata + bytes together so cross-app isolation and round-trips
+    /// can be checked without disk.
+    #[derive(Default)]
+    struct InMemoryFilesRepo {
+        #[allow(clippy::type_complexity)]
+        data: Mutex<BTreeMap<(AppId, String, Uuid), (FileMeta, Vec<u8>)>>,
+    }
+
+    fn sha256_hex(bytes: &[u8]) -> String {
+        use sha2::{Digest, Sha256};
+        let mut h = Sha256::new();
+        h.update(bytes);
+        let out = h.finalize();
+        let mut s = String::new();
+        for b in out {
+            use std::fmt::Write as _;
+            let _ = write!(s, "{b:02x}");
+        }
+        s
+    }
+
+    #[async_trait]
+    impl FilesRepo for InMemoryFilesRepo {
+        async fn create(
+            &self,
+            app_id: AppId,
+            collection: &str,
+            new: NewFile,
+        ) -> Result<FileMeta, FilesRepoError> {
+            let id = Uuid::new_v4();
+            let now = Utc::now();
+            let meta = FileMeta {
+                id,
+                collection: collection.to_string(),
+                name: new.name.clone(),
+                content_type: new.content_type.clone(),
+                size: new.data.len() as u64,
+                checksum: sha256_hex(&new.data),
+                created_at: now,
+                updated_at: now,
+            };
+            self.data.lock().await.insert(
+                (app_id, collection.to_string(), id),
+                (meta.clone(), new.data),
+            );
+            Ok(meta)
+        }
+
+        async fn head(
+            &self,
+            app_id: AppId,
+            collection: &str,
+            id: Uuid,
+        ) -> Result<Option<FileMeta>, FilesRepoError> {
+            Ok(self
+                .data
+                .lock()
+                .await
+                .get(&(app_id, collection.to_string(), id))
+                .map(|(m, _)| m.clone()))
+        }
+
+        async fn get(
+            &self,
+            app_id: AppId,
+            collection: &str,
+            id: Uuid,
+        ) -> Result<Option<Vec<u8>>, FilesRepoError> {
+            Ok(self
+                .data
+                .lock()
+                .await
+                .get(&(app_id, collection.to_string(), id))
+                .map(|(_, b)| b.clone()))
+        }
+
+        async fn update(
+            &self,
+            app_id: AppId,
+            collection: &str,
+            id: Uuid,
+            upd: FileUpdate,
+        ) -> Result<Option<FileUpdated>, FilesRepoError> {
+            let mut data = self.data.lock().await;
+            let key = (app_id, collection.to_string(), id);
+            let Some((prev_meta, _)) = data.get(&key).cloned() else {
+                return Ok(None);
+            };
+            let now = Utc::now();
+            let new_meta = FileMeta {
+                id,
+                collection: collection.to_string(),
+                name: upd.name.clone().unwrap_or_else(|| prev_meta.name.clone()),
+                content_type: upd
+                    .content_type
+                    .clone()
+                    .unwrap_or_else(|| prev_meta.content_type.clone()),
+                size: upd.data.len() as u64,
+                checksum: sha256_hex(&upd.data),
+                created_at: prev_meta.created_at,
+                updated_at: now,
+            };
+            data.insert(key, (new_meta.clone(), upd.data));
+            Ok(Some(FileUpdated {
+                new: new_meta,
+                prev: prev_meta,
+            }))
+        }
+
+        async fn delete(
+            &self,
+            app_id: AppId,
+            collection: &str,
+            id: Uuid,
+        ) -> Result<Option<FileMeta>, FilesRepoError> {
+            Ok(self
+                .data
+                .lock()
+                .await
+                .remove(&(app_id, collection.to_string(), id))
+                .map(|(m, _)| m))
+        }
+
+        async fn list(
+            &self,
+            app_id: AppId,
+            collection: &str,
+            cursor: Option<&str>,
+            limit: u32,
+        ) -> Result<FilesListPage, FilesRepoError> {
+            let data = self.data.lock().await;
+            let after = cursor.and_then(|c| Uuid::parse_str(c).ok());
+            let mut metas: Vec<FileMeta> = data
+                .iter()
+                .filter(|((a, c, _), _)| *a == app_id && c == collection)
+                .map(|(_, (m, _))| m.clone())
+                .filter(|m| after.is_none_or(|a| m.id > a))
+                .collect();
+            metas.sort_by_key(|m| m.id);
+            let take = (limit.max(1)) as usize;
+            let next_cursor = if metas.len() > take {
+                metas.truncate(take);
+                metas.last().map(|m| m.id.to_string())
+            } else {
+                None
+            };
+            Ok(FilesListPage {
+                files: metas,
+                next_cursor,
+            })
+        }
+    }
+
+    /// Captures emitted events so tests can assert on fan-out shape.
+    #[derive(Default)]
+    struct CapturingEmitter {
+        events: StdMutex<Vec<ServiceEvent>>,
+    }
+
+    #[async_trait]
+    impl ServiceEventEmitter for CapturingEmitter {
+        async fn emit(&self, _cx: &SdkCallCx, event: ServiceEvent) -> Result<(), EmitError> {
+            self.events.lock().unwrap().push(event);
+            Ok(())
+        }
+    }
+
+    #[derive(Default)]
+    struct DenyingAuthzRepo;
+    #[async_trait]
+    impl AuthzRepo for DenyingAuthzRepo {
+        async fn membership(
+            &self,
+            _user_id: UserId,
+            _app_id: AppId,
+        ) -> Result<Option<AppRole>, AuthzError> {
+            Ok(None)
+        }
+    }
+
+    #[derive(Default)]
+    struct EditorAuthzRepo;
+    #[async_trait]
+    impl AuthzRepo for EditorAuthzRepo {
+        async fn membership(
+            &self,
+            _user_id: UserId,
+            _app_id: AppId,
+        ) -> Result<Option<AppRole>, AuthzError> {
+            Ok(Some(AppRole::Editor))
+        }
+    }
+
+    fn anon_cx(app_id: AppId) -> SdkCallCx {
+        SdkCallCx {
+            app_id,
+            script_id: ScriptId::new(),
+            principal: None,
+            execution_id: ExecutionId::new(),
+            request_id: RequestId::new(),
+            trigger_depth: 0,
+            root_execution_id: ExecutionId::new(),
+            is_dead_letter_handler: false,
+            event: None,
+        }
+    }
+
+    fn member_cx(app_id: AppId) -> SdkCallCx {
+        SdkCallCx {
+            principal: Some(Principal {
+                user_id: AdminUserId::new(),
+                instance_role: InstanceRole::Member,
+                scopes: None,
+                app_binding: None,
+            }),
+            ..anon_cx(app_id)
+        }
+    }
+
+    fn svc_with(authz: Arc<dyn AuthzRepo>, emitter: Arc<CapturingEmitter>) -> FilesServiceImpl {
+        FilesServiceImpl::new(
+            Arc::new(InMemoryFilesRepo::default()),
+            authz,
+            emitter,
+            10 * 1024 * 1024,
+        )
+    }
+
+    fn svc() -> FilesServiceImpl {
+        svc_with(
+            Arc::new(DenyingAuthzRepo),
+            Arc::new(CapturingEmitter::default()),
+        )
+    }
+
+    fn new_file(name: &str, data: &[u8]) -> NewFile {
+        NewFile {
+            name: name.to_string(),
+            content_type: "application/octet-stream".to_string(),
+            data: data.to_vec(),
+        }
+    }
+
+    #[tokio::test]
+    async fn create_then_get_head_round_trips() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        let id = files
+            .create(&cx, "avatars", new_file("a.bin", b"hello"))
+            .await
+            .unwrap();
+        let bytes = files.get(&cx, "avatars", &id.to_string()).await.unwrap();
+        assert_eq!(bytes, Some(b"hello".to_vec()));
+        let meta = files
+            .head(&cx, "avatars", &id.to_string())
+            .await
+            .unwrap()
+            .unwrap();
+        assert_eq!(meta.name, "a.bin");
+        assert_eq!(meta.size, 5);
+        assert_eq!(meta.checksum, sha256_hex(b"hello"));
+    }
+
+    #[tokio::test]
+    async fn get_and_head_missing_return_none() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        let missing = Uuid::new_v4().to_string();
+        assert_eq!(files.get(&cx, "c", &missing).await.unwrap(), None);
+        assert!(files.head(&cx, "c", &missing).await.unwrap().is_none());
+        // Non-UUID id is also "missing", not an error.
+        assert_eq!(files.get(&cx, "c", "not-a-uuid").await.unwrap(), None);
+    }
+
+    #[tokio::test]
+    async fn update_replaces_content_and_keeps_metadata_when_omitted() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        let id = files
+            .create(&cx, "c", new_file("v1.txt", b"one"))
+            .await
+            .unwrap();
+        files
+            .update(
+                &cx,
+                "c",
+                &id.to_string(),
+                FileUpdate {
+                    data: b"two!!".to_vec(),
+                    name: None,
+                    content_type: None,
+                },
+            )
+            .await
+            .unwrap();
+        let meta = files
+            .head(&cx, "c", &id.to_string())
+            .await
+            .unwrap()
+            .unwrap();
+        assert_eq!(meta.name, "v1.txt"); // kept
+        assert_eq!(meta.size, 5);
+        assert_eq!(
+            files.get(&cx, "c", &id.to_string()).await.unwrap(),
+            Some(b"two!!".to_vec())
+        );
+    }
+
+    #[tokio::test]
+    async fn update_missing_throws_not_found() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        let err = files
+            .update(
+                &cx,
+                "c",
+                &Uuid::new_v4().to_string(),
+                FileUpdate {
+                    data: b"x".to_vec(),
+                    name: None,
+                    content_type: None,
+                },
+            )
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::NotFound));
+    }
+
+    #[tokio::test]
+    async fn delete_returns_was_present() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        let id = files.create(&cx, "c", new_file("f", b"x")).await.unwrap();
+        assert!(files.delete(&cx, "c", &id.to_string()).await.unwrap());
+        assert!(!files.delete(&cx, "c", &id.to_string()).await.unwrap());
+        assert!(!files.delete(&cx, "c", "not-a-uuid").await.unwrap());
+    }
+
+    #[tokio::test]
+    async fn empty_collection_rejected() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        let err = files
+            .create(&cx, "", new_file("f", b"x"))
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::InvalidCollection(_)));
+    }
+
+    #[tokio::test]
+    async fn traversal_collection_rejected() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        for bad in ["../etc", "a/b", "a..b", "x\0y"] {
+            let err = files
+                .create(&cx, bad, new_file("f", b"x"))
+                .await
+                .unwrap_err();
+            assert!(
+                matches!(err, FilesError::InvalidCollection(_)),
+                "expected reject for {bad:?}"
+            );
+        }
+    }
+
+    #[tokio::test]
+    async fn missing_required_fields_have_field_specific_messages() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        // name
+        let err = files
+            .create(
+                &cx,
+                "c",
+                NewFile {
+                    name: "  ".into(),
+                    content_type: "text/plain".into(),
+                    data: b"x".to_vec(),
+                },
+            )
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::MissingField("name")));
+        // content_type
+        let err = files
+            .create(
+                &cx,
+                "c",
+                NewFile {
+                    name: "f".into(),
+                    content_type: String::new(),
+                    data: b"x".to_vec(),
+                },
+            )
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::MissingField("content_type")));
+        // data
+        let err = files
+            .create(
+                &cx,
+                "c",
+                NewFile {
+                    name: "f".into(),
+                    content_type: "text/plain".into(),
+                    data: vec![],
+                },
+            )
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::MissingField("data")));
+    }
+
+    #[tokio::test]
+    async fn name_and_content_type_length_caps_enforced() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        let long_name = "x".repeat(256);
+        let err = files
+            .create(&cx, "c", new_file(&long_name, b"x"))
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::NameTooLong(256)));
+
+        let err = files
+            .create(
+                &cx,
+                "c",
+                NewFile {
+                    name: "f".into(),
+                    content_type: "x".repeat(128),
+                    data: b"x".to_vec(),
+                },
+            )
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::ContentTypeTooLong(128)));
+    }
+
+    #[tokio::test]
+    async fn per_file_size_cap_enforced() {
+        let files = FilesServiceImpl::new(
+            Arc::new(InMemoryFilesRepo::default()),
+            Arc::new(DenyingAuthzRepo),
+            Arc::new(CapturingEmitter::default()),
+            8, // tiny cap
+        );
+        let cx = anon_cx(AppId::new());
+        let err = files
+            .create(&cx, "c", new_file("big", b"123456789"))
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::TooLarge { limit: 8, .. }));
+    }
+
+    #[tokio::test]
+    async fn cross_app_isolation() {
+        let files = svc();
+        let app_a = AppId::new();
+        let app_b = AppId::new();
+        let cx_a = anon_cx(app_a);
+        let cx_b = anon_cx(app_b);
+        let id = files
+            .create(&cx_a, "shared", new_file("f", b"from-a"))
+            .await
+            .unwrap();
+        // app B cannot see app A's file by id.
+        assert_eq!(
+            files.get(&cx_b, "shared", &id.to_string()).await.unwrap(),
+            None
+        );
+        assert!(files
+            .head(&cx_b, "shared", &id.to_string())
+            .await
+            .unwrap()
+            .is_none());
+        let page_b = files.list(&cx_b, "shared", None, 100).await.unwrap();
+        assert!(page_b.files.is_empty());
+        // app A still sees it.
+        assert!(files
+            .get(&cx_a, "shared", &id.to_string())
+            .await
+            .unwrap()
+            .is_some());
+    }
+
+    #[tokio::test]
+    async fn anonymous_cx_skips_authz() {
+        let files = svc(); // DenyingAuthzRepo
+        let cx = anon_cx(AppId::new());
+        // No principal → no authz check, even with a denying repo.
+        files.create(&cx, "c", new_file("f", b"x")).await.unwrap();
+    }
+
+    #[tokio::test]
+    async fn member_without_role_is_forbidden() {
+        let files = svc(); // DenyingAuthzRepo
+        let cx = member_cx(AppId::new());
+        let err = files
+            .create(&cx, "c", new_file("f", b"x"))
+            .await
+            .unwrap_err();
+        assert!(matches!(err, FilesError::Forbidden));
+    }
+
+    #[tokio::test]
+    async fn member_with_editor_role_allowed() {
+        let files = svc_with(
+            Arc::new(EditorAuthzRepo),
+            Arc::new(CapturingEmitter::default()),
+        );
+        let cx = member_cx(AppId::new());
+        files.create(&cx, "c", new_file("f", b"x")).await.unwrap();
+    }
+
+    #[tokio::test]
+    async fn mutations_emit_events_with_correct_prev() {
+        let emitter = Arc::new(CapturingEmitter::default());
+        let files = svc_with(Arc::new(DenyingAuthzRepo), emitter.clone());
+        let cx = anon_cx(AppId::new());
+
+        let id = files.create(&cx, "c", new_file("f", b"one")).await.unwrap();
+        files
+            .update(
+                &cx,
+                "c",
+                &id.to_string(),
+                FileUpdate {
+                    data: b"two".to_vec(),
+                    name: None,
+                    content_type: None,
+                },
+            )
+            .await
+            .unwrap();
+        files.delete(&cx, "c", &id.to_string()).await.unwrap();
+
+        let events = emitter.events.lock().unwrap();
+        assert_eq!(events.len(), 3);
+        // create: prev is None
+        assert_eq!(events[0].op, "create");
+        assert_eq!(events[0].source, "files");
+        assert!(events[0].old_payload.is_none());
+        assert!(events[0].payload.is_some());
+        // update: prev is the prior metadata
+        assert_eq!(events[1].op, "update");
+        assert!(events[1].old_payload.is_some());
+        // delete: prev is the deleted metadata (payload == old_payload)
+        assert_eq!(events[2].op, "delete");
+        assert_eq!(events[2].payload, events[2].old_payload);
+        assert!(events[2].payload.is_some());
+    }
+
+    #[tokio::test]
+    async fn list_cursor_paginates() {
+        let files = svc();
+        let cx = anon_cx(AppId::new());
+        for i in 0..5 {
+            files
+                .create(&cx, "c", new_file(&format!("f{i}"), b"x"))
+                .await
+                .unwrap();
+        }
+        let p1 = files.list(&cx, "c", None, 2).await.unwrap();
+        assert_eq!(p1.files.len(), 2);
+        assert!(p1.next_cursor.is_some());
+        let p2 = files
+            .list(&cx, "c", p1.next_cursor.as_deref(), 2)
+            .await
+            .unwrap();
+        assert_eq!(p2.files.len(), 2);
+        let p3 = files
+            .list(&cx, "c", p2.next_cursor.as_deref(), 2)
+            .await
+            .unwrap();
+        assert_eq!(p3.files.len(), 1);
+        assert!(p3.next_cursor.is_none());
+    }
+}

crates/manager-core/src/lib.rs

@@ -30,6 +30,9 @@ pub mod dispatcher;
 pub mod docs_filter;
 pub mod docs_repo;
 pub mod docs_service;
+pub mod files_api;
+pub mod files_repo;
+pub mod files_service;
 pub mod gc;
 pub mod http_service;
 pub mod kv_repo;
@@ -96,6 +99,9 @@ pub use dead_letters_api::{dead_letters_router, DeadLettersApiError, DeadLetters
 pub use dispatcher::{compute_backoff, Dispatcher, DispatcherError};
 pub use docs_repo::{DocsRepo, DocsRepoError, PostgresDocsRepo};
 pub use docs_service::DocsServiceImpl;
+pub use files_api::{files_admin_router, FilesAdminState};
+pub use files_repo::{FilesConfig, FilesRepo, FilesRepoError, FsFilesRepo};
+pub use files_service::FilesServiceImpl;
 pub use gc::{spawn_abandoned_gc, spawn_dead_letter_gc};
 pub use http_service::{HttpConfig, HttpServiceImpl};
 pub use kv_repo::{KvRepo, KvRepoError, PostgresKvRepo};
@@ -116,8 +122,9 @@ pub use route_repo::{NewRoute, PostgresRouteRepository, RouteRepository};
 pub use sandbox::{CeilingError, SandboxCeiling};
 pub use trigger_config::{BackoffShape, TriggerConfig};
 pub use trigger_repo::{
-    collection_matches, CreateDeadLetterTrigger, CreateDocsTrigger, CreateKvTrigger,
+    collection_matches, CreateDeadLetterTrigger, CreateDocsTrigger, CreateFilesTrigger,
-    DeadLetterTriggerMatch, DocsTriggerMatch, KvTriggerMatch, PostgresTriggerRepo, Trigger,
+    CreateKvTrigger, DeadLetterTriggerMatch, DocsTriggerMatch, FilesTriggerMatch, KvTriggerMatch,
-    TriggerDetails, TriggerDispatchMode, TriggerKind, TriggerRepo, TriggerRepoError,
+    PostgresTriggerRepo, Trigger, TriggerDetails, TriggerDispatchMode, TriggerKind, TriggerRepo,
+    TriggerRepoError,
 };
 pub use triggers_api::{triggers_router, TriggersApiError, TriggersState};

crates/manager-core/src/outbox_event_emitter.rs

@@ -19,7 +19,8 @@ use std::sync::Arc;
 
 use async_trait::async_trait;
 use picloud_shared::{
-    DocsEventOp, EmitError, KvEventOp, SdkCallCx, ServiceEvent, ServiceEventEmitter, TriggerEvent,
+    DocsEventOp, EmitError, FileMeta, FilesEventOp, KvEventOp, SdkCallCx, ServiceEvent,
+    ServiceEventEmitter, TriggerEvent,
 };
 
 use crate::outbox_repo::{NewOutboxRow, OutboxRepo, OutboxSourceKind};
@@ -43,6 +44,7 @@ impl ServiceEventEmitter for OutboxEventEmitter {
         match event.source {
             "kv" => self.emit_kv(cx, event).await,
             "docs" => self.emit_docs(cx, event).await,
+            "files" => self.emit_files(cx, event).await,
             // Future sources land here. For now, silently drop — the
             // SDK calls `events.emit(...)` unconditionally for forward
             // compat, so swallowing without an error is correct.
@@ -154,4 +156,68 @@ impl OutboxEventEmitter {
         }
         Ok(())
     }
+
+    /// v1.1.5. Fan out a files mutation across matching files triggers.
+    /// The `ServiceEvent.payload` is the file **metadata** (never the
+    /// blob bytes); `old_payload` is the prior metadata (the deleted
+    /// row's metadata on delete). The `TriggerEvent::Files` carries the
+    /// metadata fields explicitly + `prev` for the change-data-capture
+    /// surface.
+    async fn emit_files(&self, cx: &SdkCallCx, event: ServiceEvent) -> Result<(), EmitError> {
+        let Some(op) = FilesEventOp::from_wire(event.op) else {
+            return Ok(());
+        };
+        let Some(collection) = event.collection.clone() else {
+            return Ok(());
+        };
+        // The payload is the FileMeta JSON the FilesServiceImpl emitted.
+        let Some(meta) = event
+            .payload
+            .clone()
+            .and_then(|v| serde_json::from_value::<FileMeta>(v).ok())
+        else {
+            return Ok(());
+        };
+
+        let matches = self
+            .triggers
+            .list_matching_files(cx.app_id, &collection, op)
+            .await
+            .map_err(|e| EmitError::Unavailable(format!("trigger lookup: {e}")))?;
+
+        if matches.is_empty() {
+            return Ok(());
+        }
+
+        let trigger_event = TriggerEvent::Files {
+            op,
+            collection,
+            id: meta.id.to_string(),
+            name: meta.name,
+            content_type: meta.content_type,
+            size: meta.size,
+            checksum: meta.checksum,
+            prev: event.old_payload.clone(),
+        };
+        let payload = serde_json::to_value(&trigger_event)
+            .map_err(|e| EmitError::Rejected(format!("event serialize: {e}")))?;
+
+        for m in matches {
+            self.outbox
+                .insert(NewOutboxRow {
+                    app_id: cx.app_id,
+                    source_kind: OutboxSourceKind::Files,
+                    trigger_id: Some(m.trigger_id),
+                    script_id: Some(m.script_id),
+                    reply_to: None,
+                    payload: payload.clone(),
+                    origin_principal: cx.principal.as_ref().map(|p| p.user_id),
+                    trigger_depth: cx.trigger_depth.saturating_add(1),
+                    root_execution_id: Some(cx.root_execution_id),
+                })
+                .await
+                .map_err(|e| EmitError::Unavailable(format!("outbox insert: {e}")))?;
+        }
+        Ok(())
+    }
 }

crates/manager-core/src/outbox_repo.rs

@@ -27,6 +27,8 @@ pub enum OutboxSourceKind {
     DeadLetter,
     /// v1.1.4.
     Cron,
+    /// v1.1.5.
+    Files,
 }
 
 impl OutboxSourceKind {
@@ -38,6 +40,7 @@ impl OutboxSourceKind {
             Self::Docs => "docs",
             Self::DeadLetter => "dead_letter",
             Self::Cron => "cron",
+            Self::Files => "files",
         }
     }
 
@@ -49,6 +52,7 @@ impl OutboxSourceKind {
             "docs" => Some(Self::Docs),
             "dead_letter" => Some(Self::DeadLetter),
             "cron" => Some(Self::Cron),
+            "files" => Some(Self::Files),
             _ => None,
         }
     }

crates/manager-core/src/trigger_repo.rs

@@ -5,7 +5,9 @@
 
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
-use picloud_shared::{AdminUserId, AppId, DocsEventOp, KvEventOp, ScriptId, TriggerId};
+use picloud_shared::{
+    AdminUserId, AppId, DocsEventOp, FilesEventOp, KvEventOp, ScriptId, TriggerId,
+};
 use serde::{Deserialize, Serialize};
 use sqlx::PgPool;
 use uuid::Uuid;
@@ -51,6 +53,8 @@ pub enum TriggerKind {
     DeadLetter,
     /// v1.1.4.
     Cron,
+    /// v1.1.5.
+    Files,
 }
 
 impl TriggerKind {
@@ -61,6 +65,7 @@ impl TriggerKind {
             Self::Docs => "docs",
             Self::DeadLetter => "dead_letter",
             Self::Cron => "cron",
+            Self::Files => "files",
         }
     }
 
@@ -71,6 +76,7 @@ impl TriggerKind {
             "docs" => Some(Self::Docs),
             "dead_letter" => Some(Self::DeadLetter),
             "cron" => Some(Self::Cron),
+            "files" => Some(Self::Files),
             _ => None,
         }
     }
@@ -120,6 +126,11 @@ pub enum TriggerDetails {
         #[serde(default, skip_serializing_if = "Option::is_none")]
         last_fired_at: Option<DateTime<Utc>>,
     },
+    /// v1.1.5. Same shape as KV/docs: a collection glob + op subset.
+    Files {
+        collection_glob: String,
+        ops: Vec<FilesEventOp>,
+    },
 }
 
 /// Create payload for a KV trigger. Defaults applied at the admin
@@ -175,6 +186,33 @@ pub struct CreateCronTrigger {
     pub registered_by_principal: AdminUserId,
 }
 
+/// Create payload for a files trigger (v1.1.5). Same shape as KV with
+/// `FilesEventOp` ops.
+#[derive(Debug, Clone)]
+pub struct CreateFilesTrigger {
+    pub script_id: ScriptId,
+    pub collection_glob: String,
+    pub ops: Vec<FilesEventOp>,
+    pub dispatch_mode: TriggerDispatchMode,
+    pub retry_max_attempts: u32,
+    pub retry_backoff: BackoffShape,
+    pub retry_base_ms: u32,
+    pub registered_by_principal: AdminUserId,
+}
+
+/// One match for the dispatcher's files trigger fan-out lookup
+/// (v1.1.5). Same shape as `KvTriggerMatch`.
+#[derive(Debug, Clone)]
+pub struct FilesTriggerMatch {
+    pub trigger_id: TriggerId,
+    pub script_id: ScriptId,
+    pub dispatch_mode: TriggerDispatchMode,
+    pub retry_max_attempts: u32,
+    pub retry_backoff: BackoffShape,
+    pub retry_base_ms: u32,
+    pub registered_by_principal: AdminUserId,
+}
+
 /// One match for the dispatcher's "which KV triggers fire on this
 /// event" lookup. Carries everything the dispatcher needs to construct
 /// the outbox row.
@@ -242,6 +280,13 @@ pub trait TriggerRepo: Send + Sync {
         req: CreateCronTrigger,
     ) -> Result<Trigger, TriggerRepoError>;
 
+    /// v1.1.5.
+    async fn create_files_trigger(
+        &self,
+        app_id: AppId,
+        req: CreateFilesTrigger,
+    ) -> Result<Trigger, TriggerRepoError>;
+
     async fn list_for_app(&self, app_id: AppId) -> Result<Vec<Trigger>, TriggerRepoError>;
 
     async fn get(&self, id: TriggerId) -> Result<Option<Trigger>, TriggerRepoError>;
@@ -269,6 +314,16 @@ pub trait TriggerRepo: Send + Sync {
         op: DocsEventOp,
     ) -> Result<Vec<DocsTriggerMatch>, TriggerRepoError>;
 
+    /// Dispatcher hot path for files fan-out (v1.1.5). Mirrors the KV
+    /// fan-out logic: pull every enabled files trigger, filter glob +
+    /// ops in Rust (empty ops array means "any op").
+    async fn list_matching_files(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        op: FilesEventOp,
+    ) -> Result<Vec<FilesTriggerMatch>, TriggerRepoError>;
+
     /// Dispatcher hot path for dead-letter fan-out. Filters: source
     /// (or any-source), originating trigger_id (or any), originating
     /// script_id (or any). Each filter is "match OR is_null".
@@ -555,6 +610,71 @@ impl TriggerRepo for PostgresTriggerRepo {
         })
     }
 
+    async fn create_files_trigger(
+        &self,
+        app_id: AppId,
+        req: CreateFilesTrigger,
+    ) -> Result<Trigger, TriggerRepoError> {
+        if req.collection_glob.is_empty() {
+            return Err(TriggerRepoError::Invalid(
+                "collection_glob must not be empty".into(),
+            ));
+        }
+        let mut tx = self.pool.begin().await?;
+        let parent: TriggerRow = sqlx::query_as(
+            "INSERT INTO triggers ( \
+                app_id, script_id, kind, enabled, dispatch_mode, \
+                retry_max_attempts, retry_backoff, retry_base_ms, \
+                registered_by_principal \
+             ) VALUES ($1, $2, 'files', TRUE, $3, $4, $5, $6, $7) \
+             RETURNING id, app_id, script_id, kind, enabled, dispatch_mode, \
+                       retry_max_attempts, retry_backoff, retry_base_ms, \
+                       registered_by_principal, created_at, updated_at",
+        )
+        .bind(app_id.into_inner())
+        .bind(req.script_id.into_inner())
+        .bind(req.dispatch_mode.as_str())
+        .bind(i32::try_from(req.retry_max_attempts).unwrap_or(3))
+        .bind(req.retry_backoff.as_str())
+        .bind(i32::try_from(req.retry_base_ms).unwrap_or(1000))
+        .bind(req.registered_by_principal.into_inner())
+        .fetch_one(&mut *tx)
+        .await?;
+
+        let ops_str: Vec<String> = req.ops.iter().map(|o| o.as_str().to_string()).collect();
+        sqlx::query(
+            "INSERT INTO files_trigger_details (trigger_id, collection_glob, ops) \
+             VALUES ($1, $2, $3)",
+        )
+        .bind(parent.id)
+        .bind(&req.collection_glob)
+        .bind(&ops_str)
+        .execute(&mut *tx)
+        .await?;
+
+        tx.commit().await?;
+
+        Ok(Trigger {
+            id: parent.id.into(),
+            app_id: parent.app_id.into(),
+            script_id: parent.script_id.into(),
+            kind: TriggerKind::Files,
+            enabled: parent.enabled,
+            dispatch_mode: dispatch_from_str(&parent.dispatch_mode),
+            retry_max_attempts: u32::try_from(parent.retry_max_attempts).unwrap_or(3),
+            retry_backoff: BackoffShape::from_wire(&parent.retry_backoff)
+                .unwrap_or(BackoffShape::Exponential),
+            retry_base_ms: u32::try_from(parent.retry_base_ms).unwrap_or(1000),
+            registered_by_principal: parent.registered_by_principal.into(),
+            created_at: parent.created_at,
+            updated_at: parent.updated_at,
+            details: TriggerDetails::Files {
+                collection_glob: req.collection_glob,
+                ops: req.ops,
+            },
+        })
+    }
+
     async fn list_for_app(&self, app_id: AppId) -> Result<Vec<Trigger>, TriggerRepoError> {
         let parents: Vec<TriggerRow> = sqlx::query_as(
             "SELECT id, app_id, script_id, kind, enabled, dispatch_mode, \
@@ -693,6 +813,51 @@ impl TriggerRepo for PostgresTriggerRepo {
         Ok(out)
     }
 
+    async fn list_matching_files(
+        &self,
+        app_id: AppId,
+        collection: &str,
+        op: FilesEventOp,
+    ) -> Result<Vec<FilesTriggerMatch>, TriggerRepoError> {
+        // Mirrors list_matching_kv: pull every enabled files trigger,
+        // filter glob + ops in Rust (empty ops array means "any op").
+        let rows: Vec<KvMatchRow> = sqlx::query_as(
+            "SELECT t.id, t.script_id, t.dispatch_mode, \
+                    t.retry_max_attempts, t.retry_backoff, t.retry_base_ms, \
+                    t.registered_by_principal, \
+                    d.collection_glob, d.ops \
+             FROM triggers t \
+             JOIN files_trigger_details d ON d.trigger_id = t.id \
+             WHERE t.app_id = $1 AND t.kind = 'files' AND t.enabled = TRUE",
+        )
+        .bind(app_id.into_inner())
+        .fetch_all(&self.pool)
+        .await?;
+
+        let op_str = op.as_str();
+        let mut out = Vec::new();
+        for r in rows {
+            if !collection_matches(&r.collection_glob, collection) {
+                continue;
+            }
+            let any_op = r.ops.is_empty();
+            if !any_op && !r.ops.iter().any(|o| o == op_str) {
+                continue;
+            }
+            out.push(FilesTriggerMatch {
+                trigger_id: r.id.into(),
+                script_id: r.script_id.into(),
+                dispatch_mode: dispatch_from_str(&r.dispatch_mode),
+                retry_max_attempts: u32::try_from(r.retry_max_attempts).unwrap_or(3),
+                retry_backoff: BackoffShape::from_wire(&r.retry_backoff)
+                    .unwrap_or(BackoffShape::Exponential),
+                retry_base_ms: u32::try_from(r.retry_base_ms).unwrap_or(1000),
+                registered_by_principal: r.registered_by_principal.into(),
+            });
+        }
+        Ok(out)
+    }
+
     async fn list_matching_dead_letter(
         &self,
         app_id: AppId,
@@ -729,6 +894,7 @@ impl TriggerRepo for PostgresTriggerRepo {
     }
 }
 
+#[allow(clippy::too_many_lines)]
 async fn hydrate_one(pool: &PgPool, parent: TriggerRow) -> Result<Trigger, TriggerRepoError> {
     let kind = TriggerKind::from_wire(&parent.kind).ok_or_else(|| {
         TriggerRepoError::Invalid(format!("unknown trigger kind {}", parent.kind))
@@ -797,6 +963,23 @@ async fn hydrate_one(pool: &PgPool, parent: TriggerRow) -> Result<Trigger, Trigg
                 last_fired_at: row.last_fired_at,
             }
         }
+        TriggerKind::Files => {
+            let row: KvDetailRow = sqlx::query_as(
+                "SELECT collection_glob, ops FROM files_trigger_details WHERE trigger_id = $1",
+            )
+            .bind(parent.id)
+            .fetch_one(pool)
+            .await?;
+            let ops = row
+                .ops
+                .iter()
+                .filter_map(|s| FilesEventOp::from_wire(s))
+                .collect();
+            TriggerDetails::Files {
+                collection_glob: row.collection_glob,
+                ops,
+            }
+        }
     };
 
     Ok(Trigger {

crates/manager-core/src/triggers_api.rs

@@ -16,7 +16,9 @@ use axum::http::StatusCode;
 use axum::response::{IntoResponse, Json, Response};
 use axum::routing::{delete, get, post};
 use axum::{Extension, Router};
-use picloud_shared::{AppId, DocsEventOp, KvEventOp, Principal, ScriptId, ScriptKind, TriggerId};
+use picloud_shared::{
+    AppId, DocsEventOp, FilesEventOp, KvEventOp, Principal, ScriptId, ScriptKind, TriggerId,
+};
 use serde::{Deserialize, Serialize};
 use serde_json::json;
 
@@ -25,8 +27,8 @@ use crate::authz::{require, AuthzDenied, AuthzError, AuthzRepo, Capability};
 use crate::repo::{ScriptRepository, ScriptRepositoryError};
 use crate::trigger_config::{BackoffShape, TriggerConfig};
 use crate::trigger_repo::{
-    CreateCronTrigger, CreateDeadLetterTrigger, CreateDocsTrigger, CreateKvTrigger, Trigger,
+    CreateCronTrigger, CreateDeadLetterTrigger, CreateDocsTrigger, CreateFilesTrigger,
-    TriggerDispatchMode, TriggerRepo, TriggerRepoError,
+    CreateKvTrigger, Trigger, TriggerDispatchMode, TriggerRepo, TriggerRepoError,
 };
 
 #[derive(Clone)]
@@ -54,6 +56,7 @@ pub fn triggers_router(state: TriggersState) -> Router {
         .route("/apps/{app_id}/triggers/kv", post(create_kv_trigger))
         .route("/apps/{app_id}/triggers/docs", post(create_docs_trigger))
         .route("/apps/{app_id}/triggers/cron", post(create_cron_trigger))
+        .route("/apps/{app_id}/triggers/files", post(create_files_trigger))
         .route(
             "/apps/{app_id}/triggers/dead_letter",
             post(create_dl_trigger),
@@ -139,6 +142,24 @@ fn default_timezone() -> String {
     "UTC".to_string()
 }
 
+/// v1.1.5 files trigger. Mirrors `CreateKvTriggerRequest`; `ops` uses
+/// `FilesEventOp` (`create` / `update` / `delete`).
+#[derive(Debug, Deserialize)]
+pub struct CreateFilesTriggerRequest {
+    pub script_id: ScriptId,
+    pub collection_glob: String,
+    #[serde(default)]
+    pub ops: Vec<FilesEventOp>,
+    #[serde(default = "default_dispatch")]
+    pub dispatch_mode: TriggerDispatchMode,
+    #[serde(default)]
+    pub retry_max_attempts: Option<u32>,
+    #[serde(default)]
+    pub retry_backoff: Option<BackoffShape>,
+    #[serde(default)]
+    pub retry_base_ms: Option<u32>,
+}
+
 #[derive(Debug, Deserialize)]
 pub struct CreateDeadLetterTriggerRequest {
     pub script_id: ScriptId,
@@ -328,6 +349,43 @@ async fn create_cron_trigger(
     Ok((StatusCode::CREATED, Json(created)))
 }
 
+async fn create_files_trigger(
+    State(s): State<TriggersState>,
+    Extension(principal): Extension<Principal>,
+    Path(app_id): Path<AppId>,
+    Json(input): Json<CreateFilesTriggerRequest>,
+) -> Result<(StatusCode, Json<Trigger>), TriggersApiError> {
+    ensure_app_exists(&*s.apps, app_id).await?;
+    require(
+        s.authz.as_ref(),
+        &principal,
+        Capability::AppManageTriggers(app_id),
+    )
+    .await?;
+
+    if input.collection_glob.trim().is_empty() {
+        return Err(TriggersApiError::Invalid(
+            "collection_glob must not be empty".into(),
+        ));
+    }
+    validate_trigger_target(&*s.scripts, app_id, input.script_id).await?;
+
+    let req = CreateFilesTrigger {
+        script_id: input.script_id,
+        collection_glob: input.collection_glob,
+        ops: input.ops,
+        dispatch_mode: input.dispatch_mode,
+        retry_max_attempts: input
+            .retry_max_attempts
+            .unwrap_or(s.config.retry_max_attempts),
+        retry_backoff: input.retry_backoff.unwrap_or(s.config.retry_backoff),
+        retry_base_ms: input.retry_base_ms.unwrap_or(s.config.retry_base_ms),
+        registered_by_principal: principal.user_id,
+    };
+    let created = s.triggers.create_files_trigger(app_id, req).await?;
+    Ok((StatusCode::CREATED, Json(created)))
+}
+
 async fn create_dl_trigger(
     State(s): State<TriggersState>,
     Extension(principal): Extension<Principal>,
@@ -484,13 +542,14 @@ mod tests {
     use super::*;
     use crate::app_repo::{AppLookup, AppRepository};
     use crate::trigger_repo::{
-        CreateCronTrigger, DeadLetterTriggerMatch, DocsTriggerMatch, KvTriggerMatch, Trigger,
+        CreateCronTrigger, CreateFilesTrigger, DeadLetterTriggerMatch, DocsTriggerMatch,
-        TriggerDetails, TriggerRepo, TriggerRepoError,
+        FilesTriggerMatch, KvTriggerMatch, Trigger, TriggerDetails, TriggerRepo, TriggerRepoError,
     };
     use async_trait::async_trait;
     use chrono::Utc;
     use picloud_shared::{
-        AdminUserId, App, AppRole, DocsEventOp, KvEventOp, ScriptId, TriggerId, UserId,
+        AdminUserId, App, AppRole, DocsEventOp, FilesEventOp, KvEventOp, ScriptId, TriggerId,
+        UserId,
     };
     use std::collections::HashMap;
     use tokio::sync::Mutex;
@@ -616,6 +675,34 @@ mod tests {
             self.inner.lock().await.insert(id, trigger.clone());
             Ok(trigger)
         }
+        async fn create_files_trigger(
+            &self,
+            app_id: AppId,
+            req: CreateFilesTrigger,
+        ) -> Result<Trigger, TriggerRepoError> {
+            let now = Utc::now();
+            let id = TriggerId::new();
+            let trigger = Trigger {
+                id,
+                app_id,
+                script_id: req.script_id,
+                kind: crate::trigger_repo::TriggerKind::Files,
+                enabled: true,
+                dispatch_mode: req.dispatch_mode,
+                retry_max_attempts: req.retry_max_attempts,
+                retry_backoff: req.retry_backoff,
+                retry_base_ms: req.retry_base_ms,
+                registered_by_principal: req.registered_by_principal,
+                created_at: now,
+                updated_at: now,
+                details: TriggerDetails::Files {
+                    collection_glob: req.collection_glob,
+                    ops: req.ops,
+                },
+            };
+            self.inner.lock().await.insert(id, trigger.clone());
+            Ok(trigger)
+        }
         async fn list_for_app(&self, app_id: AppId) -> Result<Vec<Trigger>, TriggerRepoError> {
             Ok(self
                 .inner
@@ -648,6 +735,14 @@ mod tests {
         ) -> Result<Vec<DocsTriggerMatch>, TriggerRepoError> {
             Ok(vec![])
         }
+        async fn list_matching_files(
+            &self,
+            _app_id: AppId,
+            _collection: &str,
+            _op: FilesEventOp,
+        ) -> Result<Vec<FilesTriggerMatch>, TriggerRepoError> {
+            Ok(vec![])
+        }
         async fn list_matching_dead_letter(
             &self,
             _app_id: AppId,

crates/picloud/src/lib.rs

@@ -11,12 +11,13 @@ use axum::{routing::get, Json, Router};
 use picloud_executor_core::{Engine, Limits};
 use picloud_manager_core::{
     admin_router, admins_router, api_keys_router, app_members_router, apps_api, apps_router,
-    attach_principal_if_present, auth_router, compile_routes, dead_letters_router, migrations,
+    attach_principal_if_present, auth_router, compile_routes, dead_letters_router,
-    require_authenticated, route_admin_router, triggers_router, AbandonedRepo,
+    files_admin_router, migrations, require_authenticated, route_admin_router, triggers_router,
-    AdminPrincipalResolver, AdminSessionRepository, AdminState, AdminUserRepository, AdminsState,
+    AbandonedRepo, AdminPrincipalResolver, AdminSessionRepository, AdminState, AdminUserRepository,
-    ApiKeyRepository, ApiKeysState, AppDomainRepository, AppMembersRepository, AppMembersState,
+    AdminsState, ApiKeyRepository, ApiKeysState, AppDomainRepository, AppMembersRepository,
-    AppRepository, AppsState, AuthState, AuthzRepo, DeadLetterRepo, DeadLettersState, Dispatcher,
+    AppMembersState, AppRepository, AppsState, AuthState, AuthzRepo, DeadLetterRepo,
-    DocsServiceImpl, HttpConfig, HttpServiceImpl, KvServiceImpl, OutboxEventEmitter, OutboxRepo,
+    DeadLettersState, Dispatcher, DocsServiceImpl, FilesAdminState, FilesConfig, FilesServiceImpl,
+    FsFilesRepo, HttpConfig, HttpServiceImpl, KvServiceImpl, OutboxEventEmitter, OutboxRepo,
     PostgresAbandonedRepo, PostgresAdminSessionRepository, PostgresAdminUserRepository,
     PostgresApiKeyRepository, PostgresAppDomainRepository, PostgresAppMembersRepository,
     PostgresAppRepository, PostgresDeadLetterRepo, PostgresDeadLetterService, PostgresDocsRepo,
@@ -31,9 +32,9 @@ use picloud_orchestrator_core::{
     LocalExecutorClient,
 };
 use picloud_shared::{
-    DeadLetterService, DocsService, ExecutionLogSink, HttpService, InboxResolver, KvService,
+    DeadLetterService, DocsService, ExecutionLogSink, FilesService, HttpService, InboxResolver,
-    OutboxWriter, ScriptValidator, ServiceEventEmitter, Services, API_VERSION, PRODUCT_VERSION,
+    KvService, OutboxWriter, ScriptValidator, ServiceEventEmitter, Services, API_VERSION,
-    SDK_VERSION, WIRE_VERSION,
+    PRODUCT_VERSION, SDK_VERSION, WIRE_VERSION,
 };
 use sqlx::postgres::PgPoolOptions;
 use sqlx::PgPool;
@@ -157,7 +158,18 @@ pub async fn build_app(pool: PgPool, auth: AuthDeps) -> anyhow::Result<Router> {
         );
     }
     let http: Arc<dyn HttpService> = Arc::new(HttpServiceImpl::new(http_config, authz.clone()));
-    let services = Services::new(kv, docs, dl_service.clone(), events, modules, http);
+    // v1.1.5 filesystem-backed blob storage. Metadata lives in Postgres;
+    // the bytes live on disk under `PICLOUD_FILES_ROOT` (default ./data).
+    let files_config = FilesConfig::from_env();
+    let files_max_size = files_config.max_file_size_bytes;
+    let files_repo = Arc::new(FsFilesRepo::new(pool.clone(), files_config));
+    let files: Arc<dyn FilesService> = Arc::new(FilesServiceImpl::new(
+        files_repo.clone(),
+        authz.clone(),
+        events.clone(),
+        files_max_size,
+    ));
+    let services = Services::new(kv, docs, dl_service.clone(), events, modules, http, files);
     let engine = Arc::new(Engine::new(Limits::default(), services));
 
     // Compile the routes table once at startup; admin writes refresh it.
@@ -270,6 +282,11 @@ pub async fn build_app(pool: PgPool, auth: AuthDeps) -> anyhow::Result<Router> {
         apps: apps_repo.clone(),
         authz: authz.clone(),
     };
+    let files_admin_state = FilesAdminState {
+        files: files_repo,
+        apps: apps_repo.clone(),
+        authz: authz.clone(),
+    };
     let apps_state = AppsState {
         apps: apps_repo,
         domains: domains_repo,
@@ -312,6 +329,7 @@ pub async fn build_app(pool: PgPool, auth: AuthDeps) -> anyhow::Result<Router> {
         .merge(app_members_router(app_members_state))
         .merge(api_keys_router(api_keys_state))
         .merge(triggers_router(triggers_state))
+        .merge(files_admin_router(files_admin_state))
         .merge(dead_letters_router(dead_letters_state))
         .layer(from_fn_with_state(
             auth_state.clone(),

crates/shared/src/files.rs

@@ -0,0 +1,339 @@
+//! `FilesService` — the v1.1.5 filesystem-backed blob store contract.
+//!
+//! Lives in `picloud-shared` (not `executor-core`) so the Rhai bridge,
+//! the manager-core filesystem+Postgres impl, and any in-memory test
+//! impl can all depend on the same trait without dragging
+//! `executor-core` into a Postgres or filesystem dependency.
+//!
+//! Implementations MUST derive every storage `app_id` from `cx.app_id`
+//! — never from a script-passed argument. That is the cross-app
+//! isolation boundary; see `docs/sdk-shape.md`.
+//!
+//! `FilesService` is collection-scoped: scripts get a handle via
+//! `files::collection(name)` and call
+//! `create`/`head`/`get`/`update`/`delete`/`list` on it. The blob bytes
+//! never travel through Postgres or through trigger payloads — the row
+//! is metadata + a SHA-256 checksum; the bytes live on the filesystem.
+
+use async_trait::async_trait;
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use thiserror::Error;
+use uuid::Uuid;
+
+use crate::SdkCallCx;
+
+/// POSIX-portable filename cap (255 bytes).
+pub const MAX_FILE_NAME_BYTES: usize = 255;
+/// RFC 6838 puts a reasonable media-type ceiling around 127 chars.
+pub const MAX_CONTENT_TYPE_BYTES: usize = 127;
+
+/// Payload for `create` — a brand-new blob. The id is server-generated
+/// (a UUID); scripts never supply it.
+#[derive(Debug, Clone)]
+pub struct NewFile {
+    pub name: String,
+    pub content_type: String,
+    pub data: Vec<u8>,
+}
+
+/// Payload for `update` — replacement bytes plus optional metadata. If
+/// `name` / `content_type` are `None` the prior values are kept.
+#[derive(Debug, Clone)]
+pub struct FileUpdate {
+    pub data: Vec<u8>,
+    pub name: Option<String>,
+    pub content_type: Option<String>,
+}
+
+/// File metadata as scripts and triggers see it. Serialized into
+/// `ServiceEvent.payload` (the blob bytes are NOT included — files are
+/// too big to ship through trigger payloads), and surfaced to Rhai by
+/// `head` / `list`.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct FileMeta {
+    pub id: Uuid,
+    pub collection: String,
+    pub name: String,
+    pub content_type: String,
+    pub size: u64,
+    /// Lowercase hex SHA-256 of the content.
+    pub checksum: String,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
+
+/// One page of file metadata from `FilesService::list`. `next_cursor`
+/// is `Some` when more pages exist, `None` when exhausted.
+#[derive(Debug, Clone)]
+pub struct FilesListPage {
+    pub files: Vec<FileMeta>,
+    pub next_cursor: Option<String>,
+}
+
+#[async_trait]
+pub trait FilesService: Send + Sync {
+    /// Create a new blob; returns its server-generated id. Throws on a
+    /// missing required field, an over-limit blob, or an invalid
+    /// collection name.
+    async fn create(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        new: NewFile,
+    ) -> Result<Uuid, FilesError>;
+
+    /// Metadata only — no body read. `None` if the file is missing.
+    async fn head(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+    ) -> Result<Option<FileMeta>, FilesError>;
+
+    /// Full content. `None` if missing. Verifies the stored checksum
+    /// against the bytes on disk and returns `FilesError::Corrupted`
+    /// when they diverge.
+    async fn get(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+    ) -> Result<Option<Vec<u8>>, FilesError>;
+
+    /// Replace content (and optionally metadata). Throws `NotFound`
+    /// when the file doesn't exist.
+    async fn update(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        id: &str,
+        upd: FileUpdate,
+    ) -> Result<(), FilesError>;
+
+    /// Delete by id; returns whether the file was present.
+    async fn delete(&self, cx: &SdkCallCx, collection: &str, id: &str) -> Result<bool, FilesError>;
+
+    /// Cursor-paginated metadata listing (same shape as KV's list).
+    async fn list(
+        &self,
+        cx: &SdkCallCx,
+        collection: &str,
+        cursor: Option<&str>,
+        limit: u32,
+    ) -> Result<FilesListPage, FilesError>;
+}
+
+/// Failure modes surfaced to the Rhai bridge. The bridge converts each
+/// to a Rhai runtime error string; the discriminants exist so internal
+/// callers (admin endpoints, tests) can react more precisely.
+#[derive(Debug, Error)]
+pub enum FilesError {
+    /// Empty collection name, or one containing a path separator / `..`
+    /// / NUL — rejected at the SDK boundary per `docs/sdk-shape.md`.
+    #[error("invalid collection name: {0}")]
+    InvalidCollection(String),
+
+    /// A required field on `create` was missing or empty. The string
+    /// names the field (`name` / `content_type` / `data`).
+    #[error("missing required field: {0}")]
+    MissingField(&'static str),
+
+    /// Blob exceeds the per-file size cap (default 100 MB,
+    /// `PICLOUD_FILES_MAX_FILE_SIZE_BYTES`).
+    #[error("file too large: {size} bytes exceeds limit of {limit} bytes")]
+    TooLarge { size: usize, limit: usize },
+
+    /// Filename exceeds `MAX_FILE_NAME_BYTES`.
+    #[error("file name too long: {0} bytes exceeds 255")]
+    NameTooLong(usize),
+
+    /// Content-type exceeds `MAX_CONTENT_TYPE_BYTES`.
+    #[error("content_type too long: {0} bytes exceeds 127")]
+    ContentTypeTooLong(usize),
+
+    /// `update` on a non-existent file.
+    #[error("file not found")]
+    NotFound,
+
+    /// The bytes on disk no longer match the stored checksum — the
+    /// filesystem corrupted or a backup was misconfigured. The operator
+    /// decides what to do with the metadata-vs-bytes mismatch; the repo
+    /// does NOT auto-delete.
+    #[error("file content corrupted (checksum mismatch)")]
+    Corrupted,
+
+    /// Caller principal lacked the required capability. Only raised when
+    /// `cx.principal.is_some()` — scripts running with `principal: None`
+    /// (public HTTP) operate under script-as-gate semantics and skip
+    /// the capability check.
+    #[error("forbidden")]
+    Forbidden,
+
+    /// Anything else — Postgres unavailable, filesystem I/O error, etc.
+    #[error("files backend error: {0}")]
+    Backend(String),
+}
+
+impl NewFile {
+    /// Validate required fields + length caps at the SDK boundary.
+    /// `data` must be non-empty (v1.1.5 treats an empty blob as a
+    /// missing `data` field — see HANDBACK §7).
+    ///
+    /// # Errors
+    ///
+    /// Returns the field-specific [`FilesError`] for the first failing
+    /// check.
+    pub fn validate(&self, max_size: usize) -> Result<(), FilesError> {
+        if self.name.trim().is_empty() {
+            return Err(FilesError::MissingField("name"));
+        }
+        if self.content_type.trim().is_empty() {
+            return Err(FilesError::MissingField("content_type"));
+        }
+        if self.data.is_empty() {
+            return Err(FilesError::MissingField("data"));
+        }
+        if self.name.len() > MAX_FILE_NAME_BYTES {
+            return Err(FilesError::NameTooLong(self.name.len()));
+        }
+        if self.content_type.len() > MAX_CONTENT_TYPE_BYTES {
+            return Err(FilesError::ContentTypeTooLong(self.content_type.len()));
+        }
+        if self.data.len() > max_size {
+            return Err(FilesError::TooLarge {
+                size: self.data.len(),
+                limit: max_size,
+            });
+        }
+        Ok(())
+    }
+}
+
+impl FileUpdate {
+    /// Validate the replacement bytes + any supplied metadata.
+    ///
+    /// # Errors
+    ///
+    /// Returns the field-specific [`FilesError`] for the first failing
+    /// check.
+    pub fn validate(&self, max_size: usize) -> Result<(), FilesError> {
+        if self.data.is_empty() {
+            return Err(FilesError::MissingField("data"));
+        }
+        if let Some(name) = &self.name {
+            if name.trim().is_empty() {
+                return Err(FilesError::MissingField("name"));
+            }
+            if name.len() > MAX_FILE_NAME_BYTES {
+                return Err(FilesError::NameTooLong(name.len()));
+            }
+        }
+        if let Some(ct) = &self.content_type {
+            if ct.trim().is_empty() {
+                return Err(FilesError::MissingField("content_type"));
+            }
+            if ct.len() > MAX_CONTENT_TYPE_BYTES {
+                return Err(FilesError::ContentTypeTooLong(ct.len()));
+            }
+        }
+        if self.data.len() > max_size {
+            return Err(FilesError::TooLarge {
+                size: self.data.len(),
+                limit: max_size,
+            });
+        }
+        Ok(())
+    }
+}
+
+/// Reject a collection name that is empty or could escape the per-app
+/// files tree. UUID-shaped ids never produce traversal paths, but
+/// collection names come from scripts so they're validated defensively
+/// at both the SDK boundary and the repo.
+///
+/// # Errors
+///
+/// Returns [`FilesError::InvalidCollection`] when the name is empty or
+/// contains `/`, `\`, `..`, or a NUL byte.
+pub fn validate_collection(collection: &str) -> Result<(), FilesError> {
+    if collection.is_empty() {
+        return Err(FilesError::InvalidCollection("must not be empty".into()));
+    }
+    if collection.contains('/')
+        || collection.contains('\\')
+        || collection.contains("..")
+        || collection.contains('\0')
+    {
+        return Err(FilesError::InvalidCollection(format!(
+            "collection {collection:?} must not contain '/', '\\', '..', or NUL"
+        )));
+    }
+    Ok(())
+}
+
+/// Stub used by the test harness so executor-core integration tests
+/// (which don't touch files) can construct a `Services` bundle without
+/// a filesystem or Postgres. Every call returns
+/// `FilesError::Backend("...")` so accidental use surfaces clearly.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct NoopFilesService;
+
+#[async_trait]
+impl FilesService for NoopFilesService {
+    async fn create(
+        &self,
+        _cx: &SdkCallCx,
+        _collection: &str,
+        _new: NewFile,
+    ) -> Result<Uuid, FilesError> {
+        Err(FilesError::Backend("files is not wired in".into()))
+    }
+
+    async fn head(
+        &self,
+        _cx: &SdkCallCx,
+        _collection: &str,
+        _id: &str,
+    ) -> Result<Option<FileMeta>, FilesError> {
+        Err(FilesError::Backend("files is not wired in".into()))
+    }
+
+    async fn get(
+        &self,
+        _cx: &SdkCallCx,
+        _collection: &str,
+        _id: &str,
+    ) -> Result<Option<Vec<u8>>, FilesError> {
+        Err(FilesError::Backend("files is not wired in".into()))
+    }
+
+    async fn update(
+        &self,
+        _cx: &SdkCallCx,
+        _collection: &str,
+        _id: &str,
+        _upd: FileUpdate,
+    ) -> Result<(), FilesError> {
+        Err(FilesError::Backend("files is not wired in".into()))
+    }
+
+    async fn delete(
+        &self,
+        _cx: &SdkCallCx,
+        _collection: &str,
+        _id: &str,
+    ) -> Result<bool, FilesError> {
+        Err(FilesError::Backend("files is not wired in".into()))
+    }
+
+    async fn list(
+        &self,
+        _cx: &SdkCallCx,
+        _collection: &str,
+        _cursor: Option<&str>,
+        _limit: u32,
+    ) -> Result<FilesListPage, FilesError> {
+        Err(FilesError::Backend("files is not wired in".into()))
+    }
+}

crates/shared/src/lib.rs

@@ -12,6 +12,7 @@ pub mod error;
 pub mod events;
 pub mod exec_summary;
 pub mod execution_log;
+pub mod files;
 pub mod http;
 pub mod ids;
 pub mod inbox;
@@ -36,6 +37,10 @@ pub use error::Error;
 pub use events::{EmitError, NoopEventEmitter, ServiceEvent, ServiceEventEmitter};
 pub use exec_summary::ExecResponseSummary;
 pub use execution_log::{ExecutionLog, ExecutionStatus};
+pub use files::{
+    validate_collection as validate_files_collection, FileMeta, FileUpdate, FilesError,
+    FilesListPage, FilesService, NewFile, NoopFilesService,
+};
 pub use http::{HttpError, HttpRequest, HttpResponse, HttpService, NoopHttpService};
 pub use ids::{AdminUserId, ApiKeyId, AppId, ExecutionId, RequestId, ScriptId, TriggerId};
 pub use inbox::{
@@ -50,6 +55,8 @@ pub use sandbox::ScriptSandbox;
 pub use script::{Script, ScriptKind};
 pub use sdk_cx::SdkCallCx;
 pub use services::Services;
-pub use trigger_event::{DeadLetterEventDetail, DocsEventOp, KvEventOp, TriggerEvent};
+pub use trigger_event::{
+    DeadLetterEventDetail, DocsEventOp, FilesEventOp, KvEventOp, TriggerEvent,
+};
 pub use validator::{ScriptValidator, ValidatedScript, ValidationError};
 pub use version::{API_VERSION, PRODUCT_VERSION, SDK_VERSION, WIRE_VERSION};

crates/shared/src/services.rs

@@ -20,9 +20,9 @@
 use std::sync::Arc;
 
 use crate::{
-    DeadLetterService, DocsService, HttpService, KvService, ModuleSource, NoopDeadLetterService,
+    DeadLetterService, DocsService, FilesService, HttpService, KvService, ModuleSource,
-    NoopDocsService, NoopEventEmitter, NoopHttpService, NoopKvService, NoopModuleSource,
+    NoopDeadLetterService, NoopDocsService, NoopEventEmitter, NoopFilesService, NoopHttpService,
-    ServiceEventEmitter,
+    NoopKvService, NoopModuleSource, ServiceEventEmitter,
 };
 
 /// SDK service bundle. See module docs for the lifecycle and the v1.1.x
@@ -60,6 +60,13 @@ pub struct Services {
     /// the picloud binary; `NoopHttpService` in tests that don't make
     /// network calls.
     pub http: Arc<dyn HttpService>,
+
+    /// Filesystem-backed blob storage (v1.1.5). Scripts get
+    /// `files::collection(name).{create,head,get,update,delete,list}`.
+    /// Backed by a Postgres-metadata + on-disk-bytes repo in the
+    /// picloud binary; `NoopFilesService` in tests that don't touch
+    /// files.
+    pub files: Arc<dyn FilesService>,
 }
 
 impl Services {
@@ -74,6 +81,7 @@ impl Services {
         events: Arc<dyn ServiceEventEmitter>,
         modules: Arc<dyn ModuleSource>,
         http: Arc<dyn HttpService>,
+        files: Arc<dyn FilesService>,
     ) -> Self {
         Self {
             kv,
@@ -82,6 +90,7 @@ impl Services {
             events,
             modules,
             http,
+            files,
         }
     }
 
@@ -99,6 +108,7 @@ impl Services {
             Arc::new(NoopEventEmitter),
             Arc::new(NoopModuleSource),
             Arc::new(NoopHttpService),
+            Arc::new(NoopFilesService),
         )
     }
 }

crates/shared/src/trigger_event.rs

@@ -78,6 +78,39 @@ impl DocsEventOp {
     }
 }
 
+/// Operations a files trigger can fire on. v1.1.5. Stored as a
+/// lowercase string in `files_trigger_details.ops` (Postgres `text[]`).
+/// CRUD verbs (`create`) mirror `DocsEventOp`, distinct from KV's
+/// set/upsert flavour.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum FilesEventOp {
+    Create,
+    Update,
+    Delete,
+}
+
+impl FilesEventOp {
+    #[must_use]
+    pub const fn as_str(self) -> &'static str {
+        match self {
+            Self::Create => "create",
+            Self::Update => "update",
+            Self::Delete => "delete",
+        }
+    }
+
+    #[must_use]
+    pub fn from_wire(s: &str) -> Option<Self> {
+        match s {
+            "create" => Some(Self::Create),
+            "update" => Some(Self::Update),
+            "delete" => Some(Self::Delete),
+            _ => None,
+        }
+    }
+}
+
 /// Discriminated description of a triggering event. Lifted from the
 /// outbox row's payload at dispatch time. Each variant carries the
 /// fields the corresponding `ctx.event` shape exposes to the script.
@@ -123,6 +156,27 @@ pub enum TriggerEvent {
         fired_at: DateTime<Utc>,
     },
 
+    /// A files create / update / delete fired this handler. v1.1.5.
+    /// Carries the affected file's **metadata only** — never the blob
+    /// bytes (files are too big to ship through trigger payloads). A
+    /// handler that wants the bytes calls
+    /// `files::collection(c).get(id)` itself. `prev` is the prior
+    /// metadata for update (and the deleted-row metadata for delete);
+    /// absent on create. Surfaced to scripts as `ctx.event.files`.
+    Files {
+        op: FilesEventOp,
+        collection: String,
+        /// UUID as string — Rhai sees it as a string.
+        id: String,
+        name: String,
+        content_type: String,
+        size: u64,
+        /// Lowercase hex SHA-256.
+        checksum: String,
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        prev: Option<serde_json::Value>,
+    },
+
     /// A dead-letter row fired this handler. The original event is
     /// nested verbatim plus the dead-letter metadata the design notes
     /// §4 require.
@@ -148,6 +202,7 @@ impl TriggerEvent {
             Self::Kv { .. } => "kv",
             Self::Docs { .. } => "docs",
             Self::Cron { .. } => "cron",
+            Self::Files { .. } => "files",
             Self::DeadLetter { .. } => "dead_letter",
         }
     }

dashboard/src/lib/api.ts

@@ -211,7 +211,7 @@ export interface DeadLetterRow {
 	resolution: 'replayed' | 'ignored' | 'handled_by_script' | 'handler_failed' | null;
 }
 
-export type TriggerKind = 'kv' | 'docs' | 'dead_letter' | 'cron';
+export type TriggerKind = 'kv' | 'docs' | 'dead_letter' | 'cron' | 'files' | 'pubsub';
 export type TriggerDispatchMode = 'sync' | 'async';
 
 /// Per-kind detail, tagged by `kind` to match the Rust serde shape.
@@ -219,7 +219,21 @@ export type TriggerDetails =
 	| { kind: 'kv'; collection_glob: string; ops: string[] }
 	| { kind: 'docs'; collection_glob: string; ops: string[] }
 	| { kind: 'dead_letter'; source_filter?: string; trigger_id_filter?: string; script_id_filter?: string }
-	| { kind: 'cron'; schedule: string; timezone: string; last_fired_at?: string | null };
+	| { kind: 'cron'; schedule: string; timezone: string; last_fired_at?: string | null }
+	| { kind: 'files'; collection_glob: string; ops: string[] }
+	| { kind: 'pubsub'; topic_pattern: string };
+
+/// v1.1.5 file metadata as the admin files endpoint returns it.
+export interface FileMeta {
+	id: string;
+	collection: string;
+	name: string;
+	content_type: string;
+	size: number;
+	checksum: string;
+	created_at: string;
+	updated_at: string;
+}
 
 export interface Trigger {
 	id: string;
@@ -625,6 +639,23 @@ export const api = {
 			)
 	},
 
+	files: {
+		list: (idOrSlug: string, collection: string, opts: { cursor?: string; limit?: number } = {}) => {
+			const params = new URLSearchParams();
+			params.set('collection', collection);
+			if (opts.cursor) params.set('cursor', opts.cursor);
+			if (opts.limit !== undefined) params.set('limit', String(opts.limit));
+			return adminRequest<{ files: FileMeta[]; next_cursor: string | null }>(
+				`/api/v1/admin/apps/${encodeURIComponent(idOrSlug)}/files?${params.toString()}`
+			);
+		},
+		remove: (idOrSlug: string, collection: string, fileId: string) =>
+			adminRequest<null>(
+				`/api/v1/admin/apps/${encodeURIComponent(idOrSlug)}/files/${encodeURIComponent(collection)}/${fileId}`,
+				{ method: 'DELETE' }
+			)
+	},
+
 	execute: async (
 		id: string,
 		body: unknown,

dashboard/src/routes/apps/[slug]/+page.svelte

@@ -530,6 +530,13 @@
 				class:active={activeTab === 'settings'}
 				onclick={() => (activeTab = 'settings')}>Settings</button
 			>
+			<a
+				class="tab-link"
+				href="{base}/apps/{slug}/files"
+				title="Files — browse and delete stored blobs by collection"
+			>
+				Files
+			</a>
 			<a
 				class="tab-link"
 				href="{base}/apps/{slug}/dead-letters"

dashboard/src/routes/apps/[slug]/files/+page.svelte

@@ -0,0 +1,229 @@
+<script lang="ts">
+	import { base } from '$app/paths';
+	import { page } from '$app/state';
+	import { api, ApiError, type App, type FileMeta } from '$lib/api';
+	import ConfirmModal from '$lib/ConfirmModal.svelte';
+
+	let slug = $derived(page.params.slug ?? '');
+	let app = $state<App | null>(null);
+	let collection = $state('');
+	let activeCollection = $state('');
+	let files = $state<FileMeta[]>([]);
+	let nextCursor = $state<string | null>(null);
+	let loading = $state(false);
+	let error = $state<string | null>(null);
+	let fileToRemove = $state<FileMeta | null>(null);
+	let removing = $state(false);
+
+	async function loadApp() {
+		try {
+			app = await api.apps.get(slug);
+		} catch (e) {
+			error = e instanceof ApiError ? e.message : String(e);
+		}
+	}
+
+	$effect(() => {
+		void slug;
+		void loadApp();
+	});
+
+	async function loadFiles(cursor?: string) {
+		const c = collection.trim();
+		if (!c) {
+			error = 'Enter a collection name to list its files.';
+			return;
+		}
+		loading = true;
+		error = null;
+		try {
+			const res = await api.files.list(slug, c, { cursor, limit: 100 });
+			if (cursor) {
+				files = [...files, ...res.files];
+			} else {
+				files = res.files;
+				activeCollection = c;
+			}
+			nextCursor = res.next_cursor;
+		} catch (e) {
+			error = e instanceof ApiError ? e.message : String(e);
+		} finally {
+			loading = false;
+		}
+	}
+
+	async function confirmRemove() {
+		if (!fileToRemove) return;
+		removing = true;
+		try {
+			await api.files.remove(slug, fileToRemove.collection, fileToRemove.id);
+			files = files.filter((f) => f.id !== fileToRemove!.id);
+			fileToRemove = null;
+		} catch (e) {
+			error = e instanceof ApiError ? e.message : String(e);
+		} finally {
+			removing = false;
+		}
+	}
+
+	function fmtTime(iso: string): string {
+		return new Date(iso).toLocaleString();
+	}
+
+	function fmtSize(bytes: number): string {
+		if (bytes < 1024) return `${bytes} B`;
+		if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
+		return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
+	}
+</script>
+
+<svelte:head>
+	<title>Files · {slug} · PiCloud</title>
+</svelte:head>
+
+<div class="container">
+	<header>
+		<div>
+			<a href="{base}/apps/{slug}" class="back">&larr; back to {app?.name ?? slug}</a>
+			<h1>Files</h1>
+			<p class="subtitle">
+				Browse and delete stored blobs by collection. Uploads happen from scripts via
+				<code>files::collection(c).create(…)</code>.
+			</p>
+		</div>
+	</header>
+
+	<form
+		class="collection-form"
+		onsubmit={(e) => {
+			e.preventDefault();
+			void loadFiles();
+		}}
+	>
+		<label>
+			<span>Collection</span>
+			<input bind:value={collection} placeholder="avatars" required />
+		</label>
+		<button type="submit" disabled={loading || !collection.trim()}>
+			{loading ? 'Loading…' : 'List files'}
+		</button>
+	</form>
+
+	{#if error}
+		<div class="error">{error}</div>
+	{/if}
+
+	{#if activeCollection}
+		{#if files.length === 0 && !loading}
+			<p class="muted">No files in collection <code>{activeCollection}</code>.</p>
+		{:else}
+			<table>
+				<thead>
+					<tr>
+						<th>Name</th>
+						<th>Content type</th>
+						<th>Size</th>
+						<th>Created</th>
+						<th>ID</th>
+						<th></th>
+					</tr>
+				</thead>
+				<tbody>
+					{#each files as f (f.id)}
+						<tr>
+							<td>{f.name}</td>
+							<td><code>{f.content_type}</code></td>
+							<td>{fmtSize(f.size)}</td>
+							<td>{fmtTime(f.created_at)}</td>
+							<td class="mono small">{f.id}</td>
+							<td>
+								<button type="button" class="danger" onclick={() => (fileToRemove = f)}>
+									Delete
+								</button>
+							</td>
+						</tr>
+					{/each}
+				</tbody>
+			</table>
+			{#if nextCursor}
+				<button type="button" class="secondary" onclick={() => loadFiles(nextCursor ?? undefined)}>
+					Load more
+				</button>
+			{/if}
+		{/if}
+	{/if}
+</div>
+
+{#if fileToRemove}
+	<ConfirmModal
+		title="Delete file"
+		variant="danger"
+		confirmLabel="Delete file"
+		onConfirm={confirmRemove}
+		onCancel={() => (fileToRemove = null)}
+	>
+		<p>
+			Delete <strong>{fileToRemove.name}</strong> ({fmtSize(fileToRemove.size)}) from collection
+			<code>{fileToRemove.collection}</code>? This removes both the metadata row and the bytes on
+			disk and cannot be undone.
+		</p>
+		{#if removing}<p class="muted">Deleting…</p>{/if}
+	</ConfirmModal>
+{/if}
+
+<style>
+	.container {
+		max-width: 60rem;
+		margin: 0 auto;
+		padding: 1.5rem;
+	}
+	header {
+		margin-bottom: 1rem;
+	}
+	.back {
+		font-size: 0.85rem;
+	}
+	.subtitle {
+		color: var(--muted, #666);
+		font-size: 0.9rem;
+	}
+	.collection-form {
+		display: flex;
+		align-items: flex-end;
+		gap: 0.75rem;
+		margin-bottom: 1rem;
+	}
+	.collection-form label {
+		display: flex;
+		flex-direction: column;
+		gap: 0.25rem;
+		font-size: 0.85rem;
+	}
+	table {
+		width: 100%;
+		border-collapse: collapse;
+		font-size: 0.9rem;
+	}
+	th,
+	td {
+		text-align: left;
+		padding: 0.4rem 0.6rem;
+		border-bottom: 1px solid var(--border, #e2e2e2);
+	}
+	.mono {
+		font-family: monospace;
+	}
+	.small {
+		font-size: 0.78rem;
+	}
+	.muted {
+		color: var(--muted, #666);
+	}
+	.error {
+		color: #b00020;
+		margin: 0.5rem 0;
+	}
+	button.danger {
+		color: #b00020;
+	}
+</style>