fleet-memory/skills/hindsight-docs/references/sdks/integrations/claude-code.md

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Claude Code

Biomimetic long-term memory for Claude Code using Hindsight. Automatically captures conversations and intelligently recalls relevant context — a complete port of hindsight-openclaw adapted to Claude Code's hook-based plugin architecture.

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Quick Start

# 1. Add the Hindsight marketplace and install the plugin
claude plugin marketplace add vectorize-io/hindsight
claude plugin install hindsight-memory

# 2. Configure your LLM provider for memory extraction
# Option A: OpenAI (auto-detected)
export OPENAI_API_KEY="sk-your-key"

# Option B: Anthropic (auto-detected)
export ANTHROPIC_API_KEY="your-key"

# Option C: No API key needed (uses Claude Code's own model — personal/local use only)
export HINDSIGHT_LLM_PROVIDER=claude-code

# Option D: Connect to an external Hindsight server instead of running locally
mkdir -p ~/.hindsight
echo '{"hindsightApiUrl": "https://your-hindsight-server.com"}' > ~/.hindsight/claude-code.json

# 3. Start Claude Code — the plugin activates automatically
claude

That's it! The plugin will automatically start capturing and recalling memories.

Features

• Auto-recall — on every user prompt, queries Hindsight for relevant memories and injects them as context (invisible to the chat transcript, visible to Claude)
• Auto-retain — after every response (or every N turns), extracts and retains conversation content to Hindsight for long-term storage
• Daemon management — can auto-start/stop hindsight-embed locally or connect to an external Hindsight server
• Dynamic bank IDs — supports per-agent, per-project, or per-session memory isolation
• Channel-agnostic — works with Claude Code Channels (Telegram, Discord, Slack) or interactive sessions
• Zero dependencies — pure Python stdlib, no pip install required

Architecture

The plugin uses all four Claude Code hook events:

Hook	Event	Purpose
session_start.py	SessionStart	Health check — verify Hindsight is reachable
recall.py	UserPromptSubmit	Auto-recall — query memories, inject as additionalContext
retain.py	Stop	Auto-retain — extract transcript, POST to Hindsight (async)
session_end.py	SessionEnd	Cleanup — stop auto-managed daemon if started

Connection Modes

1. External API (recommended for production)

Connect to a running Hindsight server (cloud or self-hosted). No local LLM needed — the server handles fact extraction.

{
  "hindsightApiUrl": "https://your-hindsight-server.com",
  "hindsightApiToken": "your-token"
}

2. Local Daemon (auto-managed)

The plugin automatically starts and stops hindsight-embed via uvx. Requires an LLM provider API key for local fact extraction.

Set an LLM provider:

export OPENAI_API_KEY="sk-your-key"      # Auto-detected, uses gpt-4o-mini
# or
export ANTHROPIC_API_KEY="your-key"       # Auto-detected, uses claude-3-5-haiku
# or
export HINDSIGHT_LLM_PROVIDER=claude-code # No API key needed

3. Existing Local Server

If you already have hindsight-embed running, leave hindsightApiUrl empty and set apiPort to match your server's port. The plugin will detect it automatically.

Configuration

All settings are in ~/.hindsight/claude-code.json. Every setting can also be overridden via environment variables.

Connection & Daemon

Setting	Default	Env Var	Description
hindsightApiUrl	""	HINDSIGHT_API_URL	External Hindsight API URL. Empty = use local daemon.
hindsightApiToken	null	HINDSIGHT_API_TOKEN	Auth token for external API
apiPort	9077	HINDSIGHT_API_PORT	Port for local Hindsight daemon
daemonIdleTimeout	0	HINDSIGHT_DAEMON_IDLE_TIMEOUT	Seconds before idle daemon shuts down (0 = never)
embedVersion	"latest"	HINDSIGHT_EMBED_VERSION	hindsight-embed version for uvx

LLM Provider (daemon mode only)

Setting	Default	Env Var	Description
llmProvider	auto-detect	HINDSIGHT_LLM_PROVIDER	LLM provider: openai, anthropic, gemini, groq, ollama, openai-codex, claude-code
llmModel	provider default	HINDSIGHT_LLM_MODEL	Model override

Auto-detection checks these env vars in order: OPENAI_API_KEY, ANTHROPIC_API_KEY, GEMINI_API_KEY, GROQ_API_KEY.

Memory Bank

Setting	Default	Env Var	Description
bankId	"claude_code"	HINDSIGHT_BANK_ID	Static bank ID (when dynamicBankId is false)
bankMission	generic assistant	HINDSIGHT_BANK_MISSION	Agent identity/purpose for the memory bank
retainMission	extraction prompt	—	Custom retain mission (what to extract from conversations)
dynamicBankId	false	HINDSIGHT_DYNAMIC_BANK_ID	Enable per-context memory banks
dynamicBankGranularity	["agent", "project"]	—	Fields for dynamic bank ID: agent, project, session, channel, user
bankIdPrefix	""	—	Prefix for all bank IDs (e.g. "prod")

Auto-Recall

Setting	Default	Env Var	Description
autoRecall	true	HINDSIGHT_AUTO_RECALL	Enable automatic memory recall
recallBudget	"mid"	HINDSIGHT_RECALL_BUDGET	Recall effort: low, mid, high
recallMaxTokens	1024	HINDSIGHT_RECALL_MAX_TOKENS	Max tokens in recall response
recallContextTurns	1	HINDSIGHT_RECALL_CONTEXT_TURNS	Prior turns for query composition

Auto-Retain

Setting	Default	Env Var	Description
autoRetain	true	HINDSIGHT_AUTO_RETAIN	Enable automatic retention
retainEveryNTurns	10	—	Retain every Nth turn (sliding window)
retainOverlapTurns	2	—	Extra overlap turns for continuity
retainRoles	["user", "assistant"]	—	Which message roles to retain

Miscellaneous

Setting	Default	Env Var	Description
debug	false	HINDSIGHT_DEBUG	Enable debug logging to stderr

Claude Code Channels

With Claude Code Channels, Claude Code can operate as a persistent background agent connected to Telegram, Discord, Slack, and other messaging platforms. This plugin gives Channel-based agents the same long-term memory that hindsight-openclaw provides for Openclaw agents.

For Channel agents, enable dynamic bank IDs for per-channel/per-user memory isolation:

{
  "dynamicBankId": true,
  "dynamicBankGranularity": ["agent", "channel", "user"]
}

And set channel context via environment variables:

export HINDSIGHT_CHANNEL_ID="telegram-group-12345"
export HINDSIGHT_USER_ID="user-67890"

Troubleshooting

Plugin not activating: Check Claude Code logs for [Hindsight] messages. Enable "debug": true in ~/.hindsight/claude-code.json.

Recall returning no memories: Verify the Hindsight server is reachable (curl http://localhost:9077/health). Memories need at least one retain cycle before they're available.

Daemon not starting: Ensure an LLM API key is set (or use HINDSIGHT_LLM_PROVIDER=claude-code). Review daemon logs at ~/.hindsight/profiles/claude-code.log.

High latency on recall: The recall hook has a 12-second timeout. Use recallBudget: "low" or reduce recallMaxTokens for faster responses.