AI Vector Memories for OpenCode

Persistent memory plugin for OpenCode with SQLite + RuVector retrieval and cognitive memory management.

Why This Project Exists

AI coding sessions lose context quickly. This plugin stores reusable knowledge from conversations so the assistant can remember:

• User preferences
• Project decisions
• Long-lived constraints
• High-signal semantic facts

The goal is practical continuity across sessions with low runtime overhead.

What You Get

• Persistent memory with global and project scopes
• Hybrid retrieval (Jaccard + optional embeddings)
• Decision-aware reconsolidation (duplicate/conflict/complement)
• Injection quotas and optional adaptive balancing
• Optional compression under token pressure
• Fail-open plugin behavior to avoid blocking host workflows

Quick Start

1. Install in OpenCode

Add the plugin name to your OpenCode config:

{
  "plugin": ["ai-vector-memories"],
}

Restart OpenCode.

2. Runtime Directory

On first run, the plugin creates:

• ~/.ai-vector-memories/config.jsonc
• ~/.ai-vector-memories/plugin-debug.log
• SQLite database files (path controlled by config)

3. Local Development Setup

bun install
bun run typecheck
bun run build

Configuration

Default config file: ~/.ai-vector-memories/config.jsonc

{
  "injectionMode": 1,
  "subagentMode": 1,
  "embeddingsEnabled": 0,
  "maxMemories": 20,
}

Config Fields

• injectionMode
  • 0: inject only at session start
  • 1: inject on every prompt
• subagentMode
  • 0: disable injection in subagents
  • 1: enable injection in subagents
• embeddingsEnabled
  • 0: Jaccard-only retrieval
  • 1: hybrid retrieval with embeddings
• maxMemories
  • max items injected per prompt

Environment Variable Overrides

• TRUE_MEM_INJECTION_MODE
• TRUE_MEM_SUBAGENT_MODE
• TRUE_MEM_EMBEDDINGS
• TRUE_MEM_MAX_MEMORIES

Common Commands

• bun run dev: watch and rebuild plugin bundle
• bun run build: production build + type declarations + worker bundle
• bun run typecheck: strict TypeScript validation
• bun run metrics:injection: injection metrics snapshot
• bun run metrics:report: baseline/current metrics report

Architecture at a Glance

• src/index.ts: plugin bootstrap, hook registration, fail-open runtime behavior
• src/adapters/opencode/: OpenCode integration and hook handling
• src/memory/: classification, retrieval, reconsolidation, quotas, compression
• src/extraction/: async extraction queue
• src/storage/: SQLite access and persistence logic

Read the full architecture guide: docs/architecture.md.

For New Developers

Use this reading order:

1. docs/index.md
2. docs/project-overview.md
3. docs/architecture.md
4. docs/development-guide.md
5. docs/source-tree-analysis.md

Troubleshooting

• Plugin appears loaded but no memory injection:
  • Check ~/.ai-vector-memories/plugin-debug.log
  • Confirm injectionMode and maxMemories
• Unexpected retrieval behavior:
  • Verify embeddingsEnabled and related model initialization
  • Inspect reconsolidation and scoring settings in config
• Build issues:
  • Run bun install again
  • Run bun run typecheck and resolve reported errors first

Contributing

Contributions are welcome.

• Keep TypeScript strictness intact
• Preserve fail-open behavior in runtime hooks
• Keep async heavy work out of transaction blocks
• Prefer small, focused pull requests

References

• AGENTS.md: repository conventions for coding agents
• docs/index.md: complete documentation map
• RuVector docs: https://github.com/ruvnet/RuVector/blob/main/docs/INDEX.md

License

MIT. See LICENSE.