…ks (lobehub#14501)

* 🐛 fix(kb): preserve files on NoSuchKey and clean orphan documents/tasks

NoSuchKey from object storage no longer cascades into wholesale deletion
of file rows (and their chunks/embeddings). Instead the async chunking
task is marked Error with a clear message so users can re-upload or
retry. Files whose url uses the `internal://` scheme (mirror rows for
inline custom/document) skip storage fetch entirely.

fileModel.delete and deleteMany now also remove (a) mirror documents
where sourceType='file' and fileId matches, and (b) the chunk/embedding
asyncTasks rows tied to the file. Without this, deletion left orphan
documents (still indexed by BM25, still occupying KB slots) and dangling
task rows.

Closes LOBE-8607

* 🐛 fix(kb): delete document storage objects

# 🚀 LobeHub Release (20260518)

**Release Date:** May 18, 2026  
**Since v2.1.58:** 208 merged PRs · 209 commits · 16 contributors

> v2.2.0 introduces the **Chief Agent Operator** — an agent that runs
itself end-to-end. It self-iterates against its own output, assembles
sub-agent teams on demand through the heterogeneous runtime, and drives
a unified task system that knows when to pause for a human. Self-review,
AssistantGroup, and tasks/scheduling all converge into one operator
surface.

---

## ✨ Highlights

### 🎩 Chief Agent Operator

- **Self-iteration exits Lab** — Agent Signal's self-review pipeline
ships proposal actions straight into briefs and auto-executes the
approved follow-ups, with prompts hardened against eval. The operator
now critiques and re-runs its own work without a human in the loop.
(#14769, #14583, #14647, #14882)
- **Auto-formed agent teams** — Heterogeneous AssistantGroup gains
Monitor-style signal callbacks, read-only SubAgent threads with
breadcrumb headers, and a thread switcher. The operator dispatches
sub-agents and you can step into any branch to see what the team is
doing. (#14859, #14658, #14845, #14715)
- **Task system as the operator's runway** — Claude Code surfaces task
tools, AskUserQuestion freeform notes, and a dedicated `waitingForHuman`
topic status; `lobe-task` exposes `setTaskSchedule`; the scheduler is
hardened (maxExecutions cap, sub-10min heartbeat block, race-free
SchedulerForm). Long-running operator runs no longer go silent and stop
themselves when human input is needed. (#14870, #14639, #14713, #14865,
#14853)

### 🚀 Cloud & runtime

- **Cloud Claude Code V3** — Repo picker, GitHub token flow, and
sandbox-aware context bring cloud-hosted Claude Code to feature parity
with local; cloud sandbox completion now triggers the task lifecycle
end-to-end. (#14568, #14822, #14681)
- **Heterogeneous agent multi-replica safety** — Subagent threads,
ingest refresh, and parallel-tool counts now survive replica swaps
without losing parent_id or rolling back tool state. (#14897, #14631,
#14806, #14838)
- **Built-in tool lifecycle hooks** — `onBeforeCall` / `onAfterCall`
land on the built-in tool runtime; sub-agent dispatch moves to
`lobe-agent`; self-iteration aligns with the shared inspector pattern.
(#14719, #14715, #14827)
- **Knowledge base RAG unified** — Client and server share one
`KnowledgeBaseSearchService`; KB files preserved on `NoSuchKey` instead
of silently lost. (#14673, #14501)

### 💬 Workspace experience

- **Home daily brief + recommendations** — The home screen opens with a
linkable welcome, paired input hint, and a recommendations module
sourced from the operator's hetero action library. (#14589, #14645,
#14770)
- **Chat mode + redesigned action bar** — The chat input gains a
Chat/Agent mode toggle and a re-pitched action bar with icon-and-color
action tag chips. (#14774, #14903, #14846)
- **Documents tree, optimistic** — Document tree creates, deletes, and
inline renames now apply optimistically; the agent-documents index hides
web crawls and switches to a table layout. (#14714, #14292)
- **Branded MCP inspectors** — Linear MCP tool calls render with the
same branded inspector as the built-in Linear skill; CC MCP and built-in
skills now share inspector code. (#14864, #14884)
- **Bot identity gating** — Device tools are gated by sender identity,
the activator bypass is closed, and Slack mpim plus Discord DM
regressions are fixed. (#14634, #14664, #14733)

---

## 🏗️ Core Agent & Signal Pipeline

### Self-iteration & Agent Signal

- Self-iteration graduates out of Lab, with service, tool, name, and
concept structure unified across `agent-signal`, `prompts`, `database`,
and `builtin-tool-self-iteration`. (#14699, #14769)
- Self-review now proposes actions to briefs and auto-executes the
approved set, with eval-verified prompt hardening. (#14583, #14657,
#14647)
- Self-iteration built-in tool aligns with the shared runtime +
inspector patterns. (#14827)
- Agent Signal prompts adapt their response language and avoid blocking
agent execution. (#14890, #14775, #14882)
- Receipt descriptions now carry an Agent Signal marker, and self-review
hinted skill documents route correctly. (#14764, #14895)

### Heterogeneous agent runtime

- Subagent threads render read-only with a breadcrumb header and thread
switcher; SUBAGENT badge dropped, indentation tightened. (#14658,
#14845, #14783)
- Multi-replica safety: ingest refresh restores tools/model from DB to
fix parent_id breaks; new-step assistants sync across replicas;
subagent-tagged events no longer leak into the main gateway handler.
(#14897, #14631, #14838)
- Fetch-triggering events are deferred to keep parallel tool counts from
rolling back. (#14806)
- AskUserQuestion is wired for Claude Code, with auto-decline disabled
and a freeform note input on the cloud side; `waitingForHuman` is a
first-class topic status. (#14639, #14629, #14870)
- AssistantGroup gains Monitor-style signal callbacks; project skills
surface in the working sidebar and markdown preview. (#14859, #14896)
- Cloud Claude Code V3 — repo picker, GitHub token, sandbox context;
credentials alert and disabled input when not configured. (#14568,
#14822)
- Cloud sandbox completion now triggers the task lifecycle end-to-end.
(#14681)

### Agent runtime & context engine

- Built-in tool runtime gets `onBeforeCall` / `onAfterCall` lifecycle
hooks. (#14719)
- `CompletionLifecycle`, `HumanInterventionHandler`, and
`stepPresentation` are extracted from the runtime monolith. (#14441)
- Per-tool timeout is honored end-to-end for client tool dispatch.
(#14817)
- Compression budget accounts for `tool_calls`, reasoning content, and
tool defs; `call_llm` forwards tools into the budget. (#14813, #14837)
- Pre-flight context check now fails fast for OpenAI-compatible
providers. (#14824)
- Malformed `tool_call` names are recovered instead of finishing the
step silently. (#14577)
- Sub-agent dispatch moves from `lobe-gtd` to `lobe-agent`. (#14715)
- Hidden built-in tools now appear in the system prompt @-mention list.
(#14823)

### Agent tracing & operations

- New `agent_operations` table and runtime persistence for every
hetero-agent operation. (#14416, #14736)
- `signOperationJwt` issues 4-hour signed operation tokens. (#14586)
- S3 trace snapshots are zstd-compressed; DB `trace_s3_key` aligns with
the `.json.zst` suffix; legacy `.json` fallback preserved on fetch.
(#14807, #14860, #14826)

---

## 📱 Platform & Integrations

### Bot / Channels

- Device tools are gated by sender identity. (#14634)
- Activator bypass closed and device-access checks converged. (#14664)
- Slack mpim supported; Discord DM regression fixed; Slack connect +
slash commands repaired. (#14733, #14591)
- Bot channels, bot watch, bot callback service, and system bot
reliability fixes. (#14847, #14796, #14570, #14784, #14649)
- Online Messager scaffolding. (#14755)

### Onboarding

- Home daily brief with linkable welcome and paired input hint. (#14589)
- Recommendations module sourced from the hetero agent action library.
(#14645)
- Chat onboarding passes request triggers via metadata and preserves the
resume request. (#14770, #14798)
- Discovery turn progress gated by phase, with a reminder on stalled
discovery. (#14842, #14833)
- FullNameStep back button rejoins the shared prefix; ModeSwitch hidden
in production. (#14898, #14760)
- Agent marketplace folds into the web onboarding tool. (#14578, #14672)
- Onboarding interests stored as keys instead of free text; early-exit
skips marketplace and drops CJK prompts. (#14624, #14598)

### Model providers

- Gemini 3.1 Flash-Lite cards; Gemini schema sanitizer drops
non-compliant `enum` / `required`; zero `cachedContentTokenCount`
handled in usage conversion. (#14604, #14740, #14567)
- DeepSeek-V4 model cards and pricing restored to official rates.
(#14110, #14911)
- ernie-5.1 and spark-x2-flash support; Grok 4.3 `reasoning_effort`
support. (#14643, #14731, #14642)
- SiliconCloud catalog synced with API; duplicates removed; reasoning
params adjusted. (#14464)
- Minimax derives `max_tokens` from context window to avoid
`ExceededContextWindow`. (#14814)
- aihubmix uses the full models endpoint for a complete list; stale
empty-apiKey test dropped. (#14511, #14669)
- Stream parse errors are enriched with provider + model context.
(#14636)
- Visual content parts are consumed in the server runtime; video image
references move to a JSON object. (#14637, #14900)
- Google function call magic `thoughtSignature` now attaches to every
part, not just the last turn. (#14904)
- Service model assignments settings added; model extend-param options
removed. (#14712, #14607)

### Built-in tools & knowledge base

- `lobe-task` exposes `setTaskSchedule`; task scheduler hardened
(maxExecutions cap, sub-10min heartbeat blocked, SchedulerForm race fix,
rapid automation-mode toggle stabilized). (#14713, #14865, #14853,
#14801)
- KnowledgeBaseSearchService shares RAG runtime across client and
server. (#14673)
- KB files preserved on `NoSuchKey` and orphan documents/tasks cleaned.
(#14501)
- Document tree gets optimistic create/delete + inline rename. (#14714)
- agent-documents index hides web crawls and switches to a table layout.
(#14292)
- `lobe-clarify` and SKILL.md frontmatter parsing/edit validation are
unified. (#14566)
- AnalyzeVisualMedia inspector + Portal HTML preview refactor; HTML
preview restored for AssistantGroup messages. (#14777, #14811)
- Branded inspector shared between CC MCP and built-in Linear skill.
(#14884, #14864)

---

## 🖥️ CLI & User Experience

### Chat & Conversation

- Chat mode toggle and redesigned chat input action bar. (#14774)
- Action tag chips switch to icon + colored label; ActionDropdown closes
on sibling-open and focus-out; submenu uses native header/footer slots.
(#14903, #14802, #14901)
- Action bar padding equalized around the send button; skeleton shows in
action bar while config loads. (#14846, #14656)
- `useCmdEnterToSend` is respected in thread & task inputs; send button
enables after pasting into thread/comment input. (#14850, #14816)
- TopicChatDrawer state preserved during close animation. (#14803)
- Only the last assistant block animates during markdown streaming.
(#14906)
- Right working panel no longer auto-collapses on chat mount; home agent
config fetched so knowledge toggles reflect in UI. (#14883, #14834)

### Tasks

- Task scheduler, hotkey, comment, and TodoList polish. (#14707)
- Add Subtask button & card baseline aligned; activity card stop run;
task agent manager polish. (#14848, #14559, #14569)
- Task template skeleton CLS reduced; task page placeholder copy
refreshed. (#14788, #14704)
- Task agent model snapshotted into `task.config` at create time.
(#14670)
- User-feedback card, task card polish, and Run-now context menu in
markdown. (#14727)
- Inline skill auth in recommended task templates. (#14676)

### Navigation & Layout

- Tab bar gains a Chrome-style divider between inactive tabs. (#14892)
- SideBarDrawer & header layout polish; nav ActionIcon sizing unified;
TodoList encapsulation improved. (#14762, #14692)
- Desktop header icons, sidebar density, and task menus polished.
(#14724)
- Standardized header action icon sizes. (#14717)
- Chat topic title length increased; copy session ID added to topic
dropdown menu. (#14659, #14595)
- Heterogeneous agent topic rows regain indentation. (#14783)

### Other polish

- Usage token details shortened; tool execution time formatted as `Xmin
Ys`. (#14849, #14641)
- Tool arguments display gets word-wrap toggle; long tool-call params
wrap instead of truncate. (#14706, #14640)
- Editor stops showing per-line placeholder once content is present.
(#14852)
- Visible divider between queued messages; intervention confirmation bar
polished. (#14593, #14587)
- Credit top-up copy refreshed; auth captcha retry copy refreshed; brief
recommendations layout polished. (#14821, #14561, #14871)

---

## 🔧 Tooling & Developer Experience

- Dev-only feature flag override panel. (#14565)
- `__DEV__` define replaces `process.env.NODE_ENV` in the SPA. (#14696)
- Agent-settings drops Meta/Documents tabs and restores `inputTemplate`.
(#14874)
- `local-system` forwards all `grepContent` params and moves the
executor to `/client`. (#14888)
- `lobe-task` and `setTaskSchedule` exposed. (#14713)
- Memory user-memory benchmark agent config and source-id extraction
schemas. (#14779, #14778)
- CLI man page drops stale cron entry; `clearMessages` hotkey removed.
(#14709, #14906)
- Skill docs simplified; cloud heteroContext gains sandbox TTL +
public-repo fork push guide. (#14785, #14761)

---

## 🔒 Security & Reliability

- **Security:** Sensitive comments and examples sanitized from the
production JS bundle. (#14557)
- **Security:** Inactive OIDC access rejected. (#14674)
- **Security:** CASC `new Function()` template replaced with safe string
builders. (#14751)
- **Security:** Sign-in captcha flow removed in favor of safer flow.
(#14573)
- **Security:** Desktop local file previews restricted to safe roots.
(#14789)
- **Security:** Image binary capped at 3.75 MB so base64 payload stays
under the Anthropic 5 MB limit. (#14711)
- **Reliability:** Neon/Node pools get error listeners to prevent Lambda
crashes. (#14606)
- **Reliability:** `paradedb.match(...)` replaces hardcoded normalizer
in memory search. (#14590)
- **Reliability:** `PlaceholderVariablesProcessor` errors carry
diagnostic context. (#14741)
- **Reliability:** File storage upload checks are serialized; multiple
account link bug fixed. (#14829, #14562)
- **Reliability:** `ScrollShadow` replaced with `ScrollArea` to fix a
React infinite render loop (error code 185). (#14689)
- **Reliability:** Embedding token cap enforced — long memory queries
are limited and truncated before search. (#14757)
- **Reliability:** Embed binary blob guard + oversized output cap in
`local-system.readFile`. (#14602)
- **Reliability:** Windows npm CLI shims resolved before spawning
agents. (#14772, #14720)
- **Reliability:** Vite pinned to 8.0.12 to avoid the rolldown 1.0.1
preload regression; desktop runtime externals split from native deps.
(#14804, #14776)
- **Reliability:** Old lobehub cron job removed; WeChat URL rules
dropped from web crawler. (#14630, #14633)

---

## 👥 Contributors

Huge thanks to **16 contributors** who shipped **208 merged PRs** this
cycle.

@hezhijie0327 · @sxjeru · @hardy-one · @Bianzinan · @brone1323 · @YuSaZh
· @Wxh16144 · @arvinxx · @Innei · @tjx666 · @neko · @lijian · @rdmclin2
· @sudongyuer · @AmAzing129 · @rivertwilight

Plus @lobehubbot for maintenance translations.

---

**Full Changelog**:
v2.1.58...v2.2.0