Opencode (SST)
SST team's open-source terminal coding agent — TypeScript, multi-model, MCP-native. Released 2025; explicitly positioned as a permissively-licensed Claude Code alternative. Memory via AGENTS.md (the emerging cross-harness convention).
At a glance
- Type
- OSS terminal coding agent (SST)
- Tier
- T2
- Section
- Agent IDEs & coding harnesses
- Created
- 2025-06
- Latest release
- opencode 0.x rolling
- License
- MIT
- GitHub
- ~10k★, TypeScript
- Pricing
- Free (OSS)
- Funding
- SST (Anomaly Innovations — OSS company)
Taxonomy
- storage
- file
- retrieval
- injection
- persistence
- cross-session
- update
- user-edit
- unit
- document
- governance
- inspectable
- conflict
- human-arbitrate
When to use
Optimised for: permissively-licensed terminal coding agent + MCP
Anti-fit: younger ecosystem than Aider/Claude Code
Pros & cons
Pros
Fully MIT — no per-token surcharge or vendor lock; respects AGENTS.md as the emerging cross-harness convention.
Cons
Younger than Aider/Claude Code; smaller ecosystem and fewer pre-built rules.
Claims & capabilities
Built by SST (serverless-stack); ~10k★ first year; multi-model; MCP-native.
Technical surface
- API surface
- CLI (Node.js); MCP
- Backend storage
- local AGENTS.md + config
- Deployment
- Self-host (npm)
- Embedding model
- not applicable — not a memory product
- Multi-tenancy
- single-user
- MCP
- native — Opencode is an MCP client
- A2A
- searched not found
- OpenTelemetry
- searched not found
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Related systems
References (2)
- Model Context Protocol (MCP spec) depends on at runtime — cript, multi-model, MCP-native. Released 2025; explicitly positioned as a permissively-lic
- OpenAI GPT family (GPT-5 / GPT-4o / o3 / o4) depends on at runtime — adjacent-infrastructure cell: any OpenAI-compatible API; MCP