simseSIMSE
newv0.1.0 public preview — the assistant that remembers

​coding assistant
that evolves with you

simse carries project context, decisions, and preferences across every session — so you stop starting from zero. Built for people who use AI all day, not once a week.

$ curl -fsSL cdn.simse.dev/install.sh | sh
Start freeQuick start
5
ACP backends
2
MCP servers
CLI + web
surfaces
local
library
simsedev / simse-clisource-available

in the terminal

It picks up where you left off.

Reopen a session, simse pulls library context, then drives the next step — type a follow-up below to see how it responds.

~/auth-refactor · simse · zsh
◆ library · 14 notes · 3 indexed today
> finish the rotation refactor
Resuming session 7c3a. The plan still has 3 open steps. Picking step 2 (replay-detection table) first.
⠋ fs.write auth/migrations/0042_replay.sql
✓ fs.write auth/migrations/0042_replay.sql · +28 -0 · 18ms
⠋ bash · psql -d simse_test -f auth/migrations/0042_replay.sql
✓ bash · exit 0 · 240ms
CREATE TABLE
CREATE INDEX
Done. Dry-run applied cleanly. Step 3 (revoke API) next?
›
ask(shift+tab) ·~/auth-refactor12% ctx· session 7c3a · ? shortcuts

in the browser

Same sessions. Same library.

Open app.simse.dev and your CLI sessions, memories, and plugins are already there. Click the icons or type a follow-up — it's all live.

app.simse.dev
s
/cloud auth refactor
CL
finish the rotation refactor
Resuming session 7c3a. The plan has 3 open steps. Drafting the replay-detection migration first.
✓ fs.write auth/migrations/0042_replay.sql+28 −0 · 18ms
✓ bash · psql -d simse_test -f auth/migrations/0042_replay.sqlexit 0 · 240ms
Sandbox dry-run passed (CREATE TABLE + CREATE INDEX). Open the diff to review.
›
laptop · MBP·files12% ctxPro · 600k/5M⌘K

what it does

The full surface — without the noise.

  1. 01sessions

    Persist, fork, compact.

    Pick up where you left off, branch into alternatives, let simse keep long context manageable on its own.

  2. 02library

    A memory that organizes itself.

    Notes, decisions, and project structure — indexed semantically and by text, deduplicated as you work.

  3. 03sandbox

    Run code without risking your machine.

    Shell, files, network — all inside an isolated environment, local or remote, with explicit permissions.

  4. 04sync

    Same library, every machine.

    Start on the desktop, continue on the laptop. Sessions and library stay in sync over the cloud.

  5. 05surfaces

    CLI and web app, one product.

    The full experience lives in both the terminal and app.simse.dev — same sessions, same library.

  6. 06plugins

    Skills, hooks, ACP, MCP.

    Drop in providers, tools, format-on-save hooks, or reusable skills with one plugin manifest.

bring your model

Any AI backend, same session.

simse speaks the Agent Client Protocol. Plug in Claude, a local Ollama, or your own OpenAI-compatible endpoint — without rewriting workflows or losing context.

ACPClaudeOllamaGeminiOpenAI-compatible
bash
$ simse acp statusollama     ready · llama3.1:70bclaude     ready · claude-3-5-sonnetcopilot    ready · github/copilotgemini     idle  · gemini-1.5-proopenai     idle  · gpt-4o
$ simse --provider api.example.com✓ provider registered as 'custom'
bash
$ simse mcp add github stdio gh-mcp✓ connected · 18 tools loaded✓ session sees: gh.pr.create, gh.issue.list
$ simse mcp statusgithub       connected · 18 toolsperplexity   connected · 1 toolyour-server  connected · 6 tools

bring your tools

The tools your team already runs.

Extend simse with Model Context Protocol servers — first-party plugins for GitHub and Perplexity, plus any stdio MCP server your team already runs. Add one and the current session sees it instantly.

MCPGitHubPerplexitystdio servers

pricing

Start free. Upgrade when you need more.

Monthly subscription, weekly token quotas, 5-hour session windows. Bring your own model and pay your provider directly — no markup on frontier-model costs.

  1. Free
    $0/mo

    200K weekly tokens. No card.

  2. Plus
    $8/mo

    1.5M weekly tokens. Casual use.

  3. recommended
    Pro
    $20/mo

    5M weekly tokens. Daily driver.

  4. Max
    $100/mo

    25M weekly tokens. All-day use.

Enterprise + custom-volume contracts — contact the founders.

ready when you are

Start once. Build forever.

Free plan — 200K weekly tokens, no card required. Bring your own model, or run on the hosted defaults.

Start freeRead the docs