@mem0/opencode-plugin

Persistent memory for OpenCode. Your agent remembers decisions, preferences, and learnings across sessions automatically.

Install

opencode plugin @mem0/opencode-plugin

This adds the plugin to your ~/.config/opencode/opencode.json. The plugin registers its memory tools and skills itself — there is no MCP server to configure.

Or let your agent do it — paste this into OpenCode:

Install @mem0/opencode-plugin by following https://raw.githubusercontent.com/mem0ai/mem0/main/integrations/mem0-plugin/.opencode-plugin/README.md

Get your API key (free): app.mem0.ai/dashboard/api-keys

echo 'export MEM0_API_KEY="m0-your-key"' >> ~/.zshrc && source ~/.zshrc

Restart OpenCode.

What's included

Component	Description
9 Native Memory Tools	add_memory, search_memories, get_memories, update_memory, delete_memory, and more — registered as OpenCode tools, backed by the mem0ai SDK (no MCP server required)
Lifecycle Hooks	Auto-search on session start and every prompt, error memory lookup, compaction context, secret redaction
9 Skills	/mem0-remember, /mem0-tour, /mem0-search, /mem0-status, /mem0-scope, /mem0-dream, /mem0-forget, /mem0-pin, /mem0-context-loader — discovered in place from the plugin via OpenCode's skills.paths

Hooks

Pure TypeScript — no Python, no shell scripts. Memory operations are native OpenCode tools backed by the mem0ai SDK directly.

Hook	Event	What it does
Config	config	Registers the /mem0-* slash commands (via config.command) and adds the plugin's own opencode-skills/ dir to OpenCode's skills.paths for in-place skill discovery — no copying into ~/.config/opencode/skills
Chat message	chat.message	Loads prior memories on session start, searches relevant memories before each prompt, auto-captures learnings periodically
Pre-tool	tool.execute.before	Blocks MEMORY.md writes, steering them to the add_memory tool
Post-tool	tool.execute.after	Scans bash errors and pre-fetches related memories
Messages transform	experimental.chat.messages.transform	Injects memory context (session memories, search results, error lookups) into the prompt
Compaction	experimental.session.compacting	Stores session state memory, then injects prior memories into compaction context so nothing is lost
Shell env	shell.env	Exports MEM0_USER_ID, MEM0_APP_ID, MEM0_SESSION_ID, and MEM0_BRANCH to shell

Memory Tools

Tool	Description
add_memory	Save text or conversation history
search_memories	Semantic search across memories
get_memories	List memories with filters and pagination
get_memory	Retrieve a specific memory by ID
update_memory	Overwrite a memory's text by ID
delete_memory	Delete a single memory by ID
delete_all_memories	Bulk delete all memories in scope
delete_entities	Delete an entity and its memories
list_entities	List users/agents/apps stored in Mem0

Memory scope

Every memory tool accepts an optional scope, and you can set the default scope (used when none is passed) with the /mem0-scope skill:

Scope	Reads	Writes
project (default)	this repo (user_id + app_id)	this repo
session	this run (adds run_id)	this run
global	all your projects (app_id="*")	user-wide (drops app_id)

/mem0-scope            # show the current default scope
/mem0-scope global     # save & search across all your projects by default
/mem0-scope project    # back to repo-only (default)

The default persists in ~/.mem0/settings.json (default_scope) and is read fresh on each memory operation, so a change applies immediately — no restart. delete_all_memories always requires an explicit scope="global" to delete user-wide, so changing the default can't trigger a cross-project wipe.

Verify

Start OpenCode and ask: "Search my memories for recent decisions"

If the mem0 tools respond, you're all set.

Troubleshooting

Problem	Fix
No tools appearing	Restart OpenCode after installing
401 Unauthorized	echo $MEM0_API_KEY must print your m0- key
Plugin not loading	Run opencode plugin @mem0/opencode-plugin again

License

Apache-2.0