







Turn any text field into a two-way LLM channel. It reads what you write and fills what you ask: catching a slip as you type, or answering the moment you end a line with _. A drop-in for Claude Code, OpenCode, Gemini CLI, your shell, and Chrome. Model-agnostic, output you review before it sends, an open standard with no chat window.
The model comes to your cursor, both ways. Cues react to what you've already written and surface a fix or a sharper line inline, unprompted. Blanks act on demand: end a line with _ and the model fills in the rest. No chat window, no copy-paste, no context switch.

OpenCues is platform, model, and provider agnostic, engineered from the ground up to enable native inline AI.
| You type |
You get |
| let's ship it Thursday the 19th |
↳ the 19th is a Friday |
| we should probably go ahead and refactor this |
↳ we should refactor this |
| hey can u send me that report when u get a sec make this formal _ |
Could you please send me that report at your earliest convenience? |
| 4 + 4 = _ |
4 + 4 = 8 |
| hello world translate to japanese _ |
こんにちは世界 |
| draft an email to my landlord asking for a rent reduction _ |
(the email, written) |
| ffmpeg command to convert a video to web-ready mp4 _ |
ffmpeg -i input.mov -c:v libx264 -preset slow -crf 23 -c:a aac -b:a 128k -movflags +faststart output.mp4 |
Rows with _ are blanks: you ask, the model fills in. Rows without are cues: the model speaks up on what you wrote, no prompt.






Quickstart
npm install -g opencues # needs Node 22+ and git
opencues set-key cerebras csk-... # cerebras.ai — free tier, lowest latency
opencues install claude-code # or: opencode | gemini-cli | chrome | shell | dsh
claude-cues # launch — native `claude` is untouched
Full walkthrough, prerequisites, and per-host detail: docs/install.md. opencues doctor diagnoses anything that looks wrong.



Integrations
| Host |
Status |
Install |
| Claude Code |
Available |
opencues install claude-code |
| OpenCode |
Available |
opencues install opencode |
| Gemini CLI |
Beta |
opencues install gemini-cli |
| Chrome |
Beta |
opencues install chrome |
| Shell |
Beta |
opencues install shell |
| DeepSeek Harness |
Beta |
dsh plugin --profile web add @opencues/dsh |
Each pins its own upstream fork and never touches your native host install.
DeepSeek Harness is the exception: it has a real plugin system, so there is no
fork to pin and no OpenCues CLI step — see
integrations/dsh/README.md.
⚠️ Windows: not supported natively, run inside WSL2 (see docs/install.md).









What you get
| Feature |
What it does |
| Blanks |
Type _ for free-form generation, translation, formatting, full rewrites, or keyword-bound system actions (volume _, weather _). |
| Sentence rewrites |
Cycle a whole sentence to a different register (formal, concise, ...) seamlessly, no _ needed. |
| Word cues |
Navigate to a single word and cycle a smaller LLM-suggested alternative. |
| Live actuators |
volume _ reads the real level and leaves a knob you can turn: Ctrl+Alt+↑/↓ or a bare _ moves it, and the device follows. |
| Dismissing a cue |
A cue that only tells you something can be silenced from its own note: _ once quiets it for a while, _ again forgets it for good. opencues dismissals lists what you forgot and turns any of it back on. |
| Session-contradiction cues (opt-in) |
Flags a draft that goes against a decision made earlier in the same coding session, on any host with a transcript. |
| Ask-cues (opt-in) |
Turns a vague sentence into an inline question with cyclable answers, using the assistant's own clarifying prompt. |
| Personal + ambient context (opt-in) |
my email _ substitutes your real address; fluid lookups can read the page you're on. |
| Hot-reload |
Every .md config picks up edits in ~2s, no restart. |
Full feature catalogue (44 concepts): docs/features/README.md.
Running a lot of these at once? opencues usage prices every LLM call your
hosts have made, across features, so the total isn't a guess.

Configuration & LLM providers
Config lives at ~/.cues/ — one OPENCUES.md for runtime settings, plus per-surface source folders. Seven providers supported; set an env key or opencues set-key and you're done.
Full reference: docs/configuration.md · docs/guides/llm-providers.md (switching provider/model, free mode, failover).





Security
OpenCues has no tool handlers or exec layer for LLM output — no MCP-tool execution, no agentic actions, no side-effect channel. Worst-case, an LLM response lands as user-visible text in the buffer you review before submitting. That single invariant is what keeps prompt injection a UX failure instead of a data-exfiltration channel, across every surface below.
23 of 27 tracked attack classes closed, 3 closed-with-caveat, 1 tracked for the future pack registry (full audit table).
| Defense |
What it covers |
| Sandbox isolation |
Third-party blank JS runs in a real V8 isolate (isolated-vm) — its own realm, own intrinsics, no sandbox-escape via constructor-chain pivots |
| Capability gates |
A blank only gets network/llm/storage/secrets access if declared; secrets without a matching host binding are refused at load time |
| Resource quotas |
Sliding-window caps on fetches, LLM calls, and storage writes — no polling hammer, no runaway LLM burn |
| Output sanitization |
Blank output is stripped of HTML/script tags, zero-width chars, and bidi overrides before it reaches the buffer |
Check a pack before trusting it:
opencues review ./untrusted-pack/
Full threat model: docs/architecture/security-audit.md. Reporting a vulnerability: SECURITY.md.
Contributing
Join the community — questions, feedback, and the people building alongside you. We're also part of OpenSourceIRL, a community for people building in the open.






License
Apache License 2.0.

