Cursor CLI

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Persistent memory for Cursor CLI using Hindsight. Python hook scripts automatically recall relevant context before each prompt and retain conversations after each turn — no changes to your Cursor workflow required.

Quick Start

Recommended: Hindsight Cloud

Sign up free for a Hindsight Cloud API key — no self-hosting, no local daemon to manage.

export HINDSIGHT_API_URL=https://api.hindsight.vectorize.io
export HINDSIGHT_API_TOKEN=your-api-key

git clone https://github.com/vectorize-io/hindsight.git
cd hindsight/hindsight-integrations/cursor-cli
./scripts/install.sh

The installer copies the hook scripts to ~/.cursor/hooks/cursor-cli/, writes ~/.cursor/hooks.json (merged with any existing entries), and creates ~/.hindsight/cursor-cli.json for your personal config. Restart Cursor CLI — memory is live.

To uninstall:

./scripts/uninstall.sh

Features

• Auto-recall — before each prompt, queries Hindsight for relevant memories and injects them as additional context (visible to the model, not the transcript)
• Auto-retain — after each response, and again on session end, stores the conversation to Hindsight for future recall
• Dynamic bank IDs — supports per-project memory isolation based on the working directory
• Session-level upsert — uses the session ID as the document ID so re-running the same session updates rather than duplicates stored content
• Zero dependencies — pure Python stdlib, no pip install required

Architecture

The plugin uses four Cursor CLI hook events:

Hook	Event	Purpose
session_start.py	sessionStart	Warm up — verify Hindsight is reachable
recall.py	beforeSubmitPrompt	Auto-recall — query memories, inject as additional context
retain.py	stop	Auto-retain — extract transcript, POST to Hindsight (async)
session_end.py	sessionEnd	Final flush — force a retain so the last turns aren't lost

On beforeSubmitPrompt, the hook reads the prompt, queries Hindsight for the most relevant memories, and injects a context block. Cursor prepends this to the conversation before sending it to the model:

<hindsight_memories>
Relevant memories from past conversations...
Current time - 2026-03-27 09:14

- Project uses FastAPI with asyncpg — not SQLAlchemy [world] (2026-03-26)
- Preferred testing framework: pytest with pytest-asyncio [experience] (2026-03-26)
</hindsight_memories>

On stop (and again on sessionEnd), the hook reads the session transcript, strips previously injected memory tags (to prevent feedback loops), and POSTs the conversation to Hindsight asynchronously.

Connection Modes

1. External API (recommended)

Connect to a running Hindsight server (cloud or self-hosted) via ~/.hindsight/cursor-cli.json:

{
  "hindsightApiUrl": "https://api.hindsight.vectorize.io",
  "hindsightApiToken": "hsk_your_token"
}

2. Local Daemon

Run hindsight-embed locally. The session_start.py hook detects it on apiPort (default 9077). The daemon is not auto-started by the plugin — start it separately:

uvx hindsight-embed

Then leave hindsightApiUrl empty in your config and the plugin connects to http://localhost:9077.

Configuration

Default config ships in ~/.cursor/hooks/cursor-cli/settings.json. For personal overrides that survive updates, create ~/.hindsight/cursor-cli.json. Most settings can also be overridden via environment variable.

Loading order (later entries win):

1. Built-in defaults
2. Plugin settings.json (at ~/.cursor/hooks/cursor-cli/settings.json)
3. User config (~/.hindsight/cursor-cli.json)
4. Environment variables

---

Connection

Setting	Env Var	Default	Description
hindsightApiUrl	HINDSIGHT_API_URL	""	URL of the Hindsight API server. Empty = local daemon.
hindsightApiToken	HINDSIGHT_API_TOKEN	null	API token for authentication. Required for Hindsight Cloud.
apiPort	HINDSIGHT_API_PORT	9077	Port for the local hindsight-embed daemon.

---

Memory Bank

Setting	Env Var	Default	Description
bankId	HINDSIGHT_BANK_ID	"cursor-cli"	The bank to read from and write to. All sessions share this bank unless dynamicBankId is enabled.
bankMission	HINDSIGHT_BANK_MISSION	coding assistant prompt	Describes the agent's purpose. Sent when creating or updating the bank.
retainMission	—	extraction prompt	Instructions for Hindsight's fact extraction — what to extract from coding conversations.
dynamicBankId	HINDSIGHT_DYNAMIC_BANK_ID	false	When true, derives a unique bank ID from dynamicBankGranularity fields — useful for per-project isolation.
dynamicBankGranularity	—	["agent", "project"]	Which fields to combine for dynamic bank IDs. "project" = working directory, "agent" = agent name.
agentName	HINDSIGHT_AGENT_NAME	"cursor-cli"	Agent name used in dynamic bank ID derivation.

---

Auto-Recall

Setting	Env Var	Default	Description
autoRecall	HINDSIGHT_AUTO_RECALL	true	Master switch for auto-recall.
recallBudget	HINDSIGHT_RECALL_BUDGET	"mid"	Search depth: "low" (fast), "mid" (balanced), "high" (thorough).
recallMaxTokens	HINDSIGHT_RECALL_MAX_TOKENS	1024	Max tokens in the recalled memory block.
recallTypes	—	["world", "experience"]	Memory types to retrieve.
recallContextTurns	HINDSIGHT_RECALL_CONTEXT_TURNS	1	Prior turns to include when building the recall query. 1 = latest prompt only.

---

Auto-Retain

Setting	Env Var	Default	Description
autoRetain	HINDSIGHT_AUTO_RETAIN	true	Master switch for auto-retain.
retainMode	HINDSIGHT_RETAIN_MODE	"full-session"	"full-session" sends the full transcript per session (upserted by session ID). "chunked" sends sliding windows every N turns.
retainEveryNTurns	—	10	Retain fires every N turns. 1 = every turn. Higher values reduce API calls.
retainContext	—	"cursor-cli"	Label identifying the source integration. Useful when multiple integrations write to the same bank.

---

Debug

Setting	Env Var	Default	Description
debug	HINDSIGHT_DEBUG	false	Enable verbose logging to stderr. All log lines are prefixed with [Hindsight].

Per-Project Memory

To give each project its own isolated memory bank, enable dynamic bank IDs:

{
  "dynamicBankId": true,
  "dynamicBankGranularity": ["agent", "project"]
}

With this config, running Cursor in ~/projects/api and ~/projects/frontend stores and recalls memories separately. Bank IDs are derived from the working directory path.

Troubleshooting

Hooks not firing: Confirm ~/.cursor/hooks.json exists and that python3 is on your shell's $PATH. Re-run ./scripts/install.sh to rewrite the hook entries.

No memories recalled: Recall returns results only after something has been retained. Complete one Cursor session first, then start a new one.

Memory not being stored: retainEveryNTurns defaults to 10 — the stop hook only fires a retain every 10 turns. While testing, add "retainEveryNTurns": 1 to ~/.hindsight/cursor-cli.json. The sessionEnd hook also forces a final retain when you close the session.

Debug mode: Add "debug": true to ~/.hindsight/cursor-cli.json to see what Hindsight is doing on each turn.