wisdom-store

An MCP server that gives AI coding assistants persistent memory, context control, and anti-hallucination tools.

Early release — actively developed, APIs may change. Expect rough edges.

What it does

Context control — Trim conversation context live (no restart needed), inject curated knowledge into sessions, monitor context usage.

Persistent knowledge — Save lessons, patterns, cautions, and edge cases to flat files that survive across sessions. Organize by project section, file, or globally.

Project indexing — AST-based symbol extraction (via @ast-grep/napi), API route detection, HTML page inventory. Produces a compact project overview designed to give Claude a detailed map of your project for a fraction of your context window.

Anti-hallucination — Symbol registry with fuzzy matching catches hallucinated function names, typos, and unknown symbols. Includes a post-write hook that automatically warns about hallucinated imports, file paths, function calls, and API routes after every edit.

Tools (11)

Context Control

Tool	Description
context_status	Check context usage — message count, estimated tokens, bloat indicators
prune_context	Trim old messages live. Modes: oldest_percent, before_message, after_phrase
inject_context	Insert curated context as a new conversation root. Requires /resume to reload

Persistent Knowledge

Tool	Description
save_wisdom	Persist lessons, patterns, cautions, edge cases, or decisions to .wisdom/ files
get_wisdom	Load wisdom for a file, section, or keyword. Call with no args for project overview
update_plan	Document feature plans with files, decisions, and status
list_wisdom	Browse what wisdom exists — sections, plans, patterns, sidecars

Project Index

Tool	Description
reindex_project	Scan project, extract symbols via AST, save to .wisdom/symbols.json
get_project_overview	Compact project map — file tree, symbols, API routes, HTML pages. Always fresh

Anti-Hallucination

Tool	Description
check_symbols	Cross-reference symbols against registry. Reports: confirmed, fuzzy match (typo?), or unknown (hallucinated?)
refresh_symbols	Re-scan and update the symbol registry

Install

git clone https://github.com/InfiniQuest-App/wisdom-store.git
cd wisdom-store
npm install

Add to your ~/.claude.json or project .mcp.json (see examples/mcp.json):

{
  "mcpServers": {
    "wisdom-store": {
      "command": "node",
      "args": ["/path/to/wisdom-store/src/mcp-server/index.js"],
      "env": {}
    }
  }
}

Restart Claude Code or run /mcp to connect.

Teaching Claude to use it

Copy the relevant sections from examples/CLAUDE.md into your project's CLAUDE.md. This teaches Claude when to load wisdom, save knowledge, check symbols, and manage context.

Hooks

The hooks/ directory contains Claude Code hooks that integrate with wisdom-store automatically.

Add to your settings file — ~/.claude/settings.json (global), .claude/settings.json (project), or .claude/settings.local.json (personal per-project). Replace /path/to/wisdom-store with your actual clone path.

Post-Write Hallucination Check

Automatically checks for hallucinations after every Write/Edit:

• Import paths pointing to files that don't exist
• Imported symbols not in the project registry
• Standalone function calls to unknown symbols
• API routes not found in the project index

Requires .wisdom/symbols.json — run get_project_overview once to generate it (auto-refreshes on each call). Only fires for code files (.js, .ts, .py, .go, .rs).

Pre-Compact Save Reminder

Reminds Claude to save important findings to wisdom-store before context gets compacted. Fires on both manual (/compact) and automatic compaction. Only fires in projects with a .wisdom/ directory.

Setup

{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Edit",
        "hooks": [{
          "type": "command",
          "command": "/path/to/wisdom-store/hooks/post-write-symbol-check.sh",
          "timeout": 10
        }]
      },
      {
        "matcher": "Write",
        "hooks": [{
          "type": "command",
          "command": "/path/to/wisdom-store/hooks/post-write-symbol-check.sh",
          "timeout": 10
        }]
      }
    ],
    "PreCompact": [
      {
        "matcher": "",
        "hooks": [{
          "type": "command",
          "command": "/path/to/wisdom-store/hooks/pre-compact-save-reminder.sh",
          "timeout": 10
        }]
      }
    ]
  }
}

How it works

Storage

Everything is flat files in a .wisdom/ directory at your project root:

.wisdom/
  index.json           # Project metadata + file list
  symbols.json         # Symbol registry (functions, classes, exports, routes)
  sections/            # Knowledge organized by topic
    auth.md
    estimates.md
  plans/               # Feature plans
    v2-migration.md
  patterns/            # Reusable patterns
    error-handling.md

Wisdom is stored at three levels:

• Project — .wisdom/sections/, .wisdom/plans/, .wisdom/patterns/ for knowledge about this project
• File-specific — Sidecar files next to source: myfile.js gets myfile.js.wisdom
• Global — ~/.claude/wisdom/ for cross-project lessons (use scope: "global" with save_wisdom)

Context manipulation

prune_context works by setting parentUuid: null on a target message in the JSONL conversation file, orphaning everything before it. This takes effect live on the next message — no restart needed.

inject_context appends a new message with parentUuid: null as a fresh root. Requires /resume to reload. A helper script (hooks/send-resume.sh) is included as a starting point for tmux automation, but manual /resume is the most reliable approach.

AST extraction

Uses @ast-grep/napi (tree-sitter based) for JavaScript/TypeScript/TSX. Extracts functions, classes, variables, exports, interfaces, types, enums. Regex fallback for Python, Go, and Rust.

The project overview is designed to be context-efficient — compact enough to fit in a single tool response while covering file tree, symbols, routes, and pages.

Example output

Running get_project_overview on this repo:

# Project Overview

## Files (16)
Total: 3,093 lines

- hooks/: symbol-check.mjs (273L)
- src/mcp-server/: index.js (371L)
- src/mcp-server/lib/: indexer.js (643L), jsonl.js (276L), wisdom.js (325L)
- src/mcp-server/tools/: check-symbols.js (87L), context-status.js (123L),
    get-project-overview.js (58L), get-wisdom.js (179L), inject-context.js (177L),
    list-wisdom.js (144L), prune-context.js (125L), refresh-symbols.js (15L),
    reindex-project.js (92L), save-wisdom.js (106L), update-plan.js (99L)

## Symbols
Functions: 62, Classes/Types: 0, Exports: 40

### Exports
- appendLine — src/mcp-server/lib/jsonl.js:273
- checkSymbols — src/mcp-server/lib/indexer.js:543
- findConversationFile — src/mcp-server/lib/jsonl.js:30
- generateOverview — src/mcp-server/lib/indexer.js:450
- handleCheckSymbols — src/mcp-server/tools/check-symbols.js:24
- handlePruneContext — src/mcp-server/tools/prune-context.js:23
- scanProject — src/mcp-server/lib/indexer.js:50
- walkChain — src/mcp-server/lib/jsonl.js:160
  ... (40 exports total)

Typical workflow

1. Start working on a task
2. get_project_overview → understand the codebase
3. get_wisdom for relevant files/sections → load past knowledge
4. Work on the task
5. save_wisdom to persist new insights
6. check_symbols after writing code → catch hallucinations
7. If context gets large: save_wisdom → prune_context → continue

Language support

Language	AST extraction	Regex fallback
JavaScript (.js, .mjs, .cjs, .jsx)	Full	-
TypeScript (.ts, .tsx)	Full	-
Python (.py)	-	Functions, classes, methods
Go (.go)	-	Functions, types, variables
Rust (.rs)	-	Functions, structs, enums, traits
HTML (.html)	-	Page titles, structure

Requirements

• Node.js 18+
• Claude Code (for MCP integration and hooks)

License

MIT