lore

lore

A portable, git-backed second-brain for Claude Code. Lore captures the durable, non-obvious things worth remembering across sessions — decisions, dead-ends, deferrals, radar items, subsystem mental models, and a running session log — and loads what's relevant automatically when a session starts.

No MCP required. Lore uses only Read, Write, Edit, Glob, Grep, and Bash(git) — tools every Claude Code session already has.

What lore captures

Capture command	What it records
/lore:defer	Work chosen not to do now, with a trigger to revisit
/lore:dead-end	Approaches tried that didn't work, with a revive condition
/lore:decision	Non-obvious architectural choices and their reasoning
/lore:radar	External things out of your control being watched
/lore:subsystem	Mental model of a system area (files, gotchas, conventions)

Session lifecycle is automatic: /lore:checkpoint snapshots in-flight state; /lore:finished wraps the session. /lore:vault-sync commits and pushes the vault at any point.

Install

1. Add the marketplace

/plugin marketplace add https://github.com/<your-fork-or-this-repo>

Or for local development:

/plugin marketplace add /path/to/lore

2. Install the plugin

/plugin install lore@lore-local

3. Set up your vault

export LORE_VAULT=~/lore   # add to ~/.bashrc or ~/.zshrc
lore init ~/lore

lore init scaffolds the vault taxonomy, copies the starter docs (README, glossary, phases, harvest-protocol), initializes a git repo, and installs a pre-commit guard that enforces the canonical status vocabulary.

$LORE_VAULT tells every hook and CLI call where the vault lives. If it is unset, lore defaults to ~/lore and emits a one-time warning at session start.

4. Start a session

Open Claude Code in any project. The SessionStart hook creates a session note for your current worktree and loads the baseline vault index into context.

Skills

Skill	Description
/lore:defer	Capture a deferred item
/lore:dead-end	Record a dead-end approach
/lore:decision	Record an architectural decision
/lore:radar	Add a radar watch item
/lore:subsystem	Create or update a subsystem profile
/lore:checkpoint	Mid-session snapshot — harvest state into the session note
/lore:finished	Canonical end-of-session finish — fill, finalize, expand harvest-pending, and commit
/lore:vault-sync	Commit and push the vault
/lore:ping	Confirm the plugin is installed and show the resolved vault path

The lore CLI

The lore CLI handles the deterministic operations skills delegate to it.

lore init <path>          Scaffold a new vault
lore new <type>           Render a template and write a new vault note
lore patch <file> <sec>   Append text under a named section (--text or stdin)
lore set-status <f> <v>   Validate and flip a note's frontmatter status
lore stats                Print vault counts
lore finish               Finalize the session note, expand harvest-pending into vault notes, and commit
lore sync                 Stage, commit, and push the vault

Run lore <subcommand> --help for full options.

How recall works

Declare keywords: on a subsystem profile:

---
type: subsystem
name: auth-service
keywords: [auth, login, oauth]
---

When the current git branch contains any of those keywords, the SessionStart hook loads that subsystem profile plus related deferred items, dead-ends, lessons, and recent sessions into the context — before you type anything.

Status vocabulary

Every note type has a canonical status: set. The pre-commit guard rejects non-canonical values. See the vault's glossary.md for the full list.

Key transitions:

• sessions: active → complete (or shelved for handoffs)
• deferred: open → resolved / dropped / graduated
• radar: active → resolved / dropped
• dead-ends: active → archived

Vault layout

lore/
  sessions/      One note per working session
  subsystems/    Mental models of system areas
  decisions/     Lightweight ADRs
  dead-ends/     Failed approaches with revive conditions
  lessons/       Mistakes plus prevention checks
  deferred/      Work set aside with revisit triggers
  radar/         External things to watch
  collaboration/ Working-style preferences
  specs/         Specification artifacts
  plans/         Implementation plans
  designs/       Design artifacts
  inbox/         Raw captures awaiting triage
  harvest-pending.md   Staging area for subagent harvest candidates

Searching the vault

Use the /lore:lore-librarian agent to search and synthesize across the vault. It uses Glob, Grep, and Read — no MCP — and returns a cited synthesis, not a raw dump.

Development

# Run the test suite
python -m pytest tests/