Claude Code + Obsidian + Graphify: The Definitive Guide to Token Savings & Persistent Memory

Persistent memory across sessions with Obsidian Zettelkasten and selective code context with Graphify. Token savings depend on the task; the historical 71.5x/session and 499x/query claims are author-reported and not reproducible from published data.

A complete setup to turn Claude Code into an agent with long-term memory and full codebase awareness — without wasting tokens re-reading files.

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Table of Contents

1. The Problem
2. The Solution (Overview)
3. Part 1 — Obsidian as Persistent Memory
4. Part 2 — Chat Import Pipeline
5. Part 3 — Graphify (Codebase Knowledge Graph)
6. Part 4 — Complete Workflow
7. Part 5 — Auto-Save Hook (Safety Net)
8. Real Results
9. Troubleshooting

The Problem

When working with Claude Code, two problems silently eat your tokens:

Problem 1 — Amnesia between sessions. Every time you open a new session, you have to re-explain your project: stack, past decisions, current bugs, what's left to do. Claude Code remembers nothing from the previous session.

Problem 2 — Codebase re-reading. Repeated source exploration can consume context tokens, but how much depends on the task and navigation tools. The historical illustration compares ~20,000 tokens of source context with ~280 tokens of graph query output: approximately 71.4x less retrieval context, not a measured reduction in complete session usage. It assumes the smaller output answers the same question; the original payloads and tokenizer were not published.

The Solution (Overview)

Two complementary systems, each solving a different problem:

Obsidian handles what was decided (declarative memory). Graphify handles how the code is structured (structural map). Together, they can help Claude Code recover relevant context. Source reads remain necessary when the graph or notes are incomplete or stale.

Part 1 — Obsidian as Persistent Memory

Concept

A single, centralized Obsidian vault acts as Claude Code's "second brain." It stores decisions, context, progress, and knowledge for all your projects. Notes follow the Zettelkasten method: atomic (one idea per note), densely interlinked, with standardized metadata.

Claude Code accesses the vault through CLAUDE.md and custom skills.

Recommended Structure

~/vault/                              # SINGLE vault for all projects
├── CLAUDE.md                         # global instructions for Claude Code
├── permanent/                        # consolidated atomic notes
├── inbox/                            # raw capture (ideas, drafts)
├── fleeting/                         # quick temporary notes
├── templates/                        # note templates
├── logs/                             # global session logs
├── references/                       # reference material
├── my-project/                       # MOCs and notes for project X
│   ├── architecture/                 #   architecture, decisions, conventions
│   ├── pipeline/                     #   data flows, APIs
│   ├── data/                         #   schema, data model
│   ├── features/                     #   planned/implemented features
│   └── logs/                         #   project session logs
├── another-project/                  # MOCs and notes for project Y
│   └── ...
├── chats/                            # imported Claude chats
│   ├── code/                         #   from Claude Code
│   └── web/                          #   from Claude Web/App
└── graphify/                         # codebase knowledge graphs
    ├── my-project/                   #   graph notes for project X
    └── another-project/              #   graph notes for project Y

Why a single vault? Having one vault per project fragments knowledge. With a single vault, a note about "Supabase Auth" links to both project A and B. The graph view reveals cross-project connections you didn't expect.

Step-by-Step Setup

Prerequisites:

• Claude Code installed and authenticated
• Obsidian installed (free: obsidian.md)

1. Create the vault:

Obsidian → "Create new vault" → choose a name and location.

2. Create the folder structure:

cd ~/vault  # adjust to your path
mkdir -p permanent inbox fleeting templates logs references
mkdir -p my-project/{architecture,pipeline,data,features,logs}

3. Create the CLAUDE.md:

This is the file Claude Code reads automatically. Create CLAUDE.md at the vault root:

# Vault — Instructions for Claude Code

## What is this vault
Centralized knowledge base for all projects.
Persistent memory across sessions.

## Project stacks
- Project X: React + Supabase
- Project Y: Python + FastAPI
(adapt to your projects)

## Zettelkasten Rules

### Note creation
- Use wikilinks: [[note-name]] (not markdown links)
- Mandatory YAML frontmatter on every note
- Filenames in kebab-case: `auth-flow.md`, not `Auth Flow.md`
- 1 concept per permanent note (atomicity)
- Minimum 2 wikilinks per note (dense linking)

### Standard frontmatter
---
title: Note Name
tags: [project, topic]
created: YYYY-MM-DD
updated: YYYY-MM-DD
status: active
type: permanent
---

### Never do
- Don't delete notes without asking
- Don't use markdown links for internal notes (use wikilinks)
- Don't create notes without frontmatter
- Don't change folder structure without documenting it

## Session Commands

### /resume
When you receive this command:
1. Read the 3 most recent session logs in logs/
2. Read architecture/decisions.md for the current project
3. Summarize current state and what's left to do

### /save
When you receive this command:
1. Create a session log in logs/YYYY-MM-DD-description.md
2. Record: what was done, decisions made, pending items
3. Add wikilinks to created/modified notes
4. Run git commit + push if in a repository

4. Create a note template:

cat > templates/default-note.md << 'EOF'
---
title: {{title}}
tags: []
created: {{date}}
updated: {{date}}
status: draft
type: permanent
---

# {{title}}

## Context

## Details

## Related links
EOF

5. Recommended Obsidian plugins:

Part 2 — Chat Import Pipeline

Concept

Your Claude chats (both Code and Web) contain valuable decisions, insights, and context that get lost in the history. This pipeline exports, processes, and imports those conversations as vault notes — with frontmatter, automatic tags, and wikilinks to existing notes.

Components

~/scripts/
├── claude_to_obsidian.py          # processor (frontmatter, tags, wikilinks)
└── sync_claude_obsidian.sh        # automation (export + process)

~/claude-exports/                   # temporary staging area (outside vault)
├── code/                           # Claude Code exports
└── web/                            # Claude Web exports

Setup

1. Install the Claude Code extractor:

pip install claude-conversation-extractor

2. Create staging directories:

mkdir -p ~/claude-exports/code ~/claude-exports/web

3. Create the post-processing script (~/scripts/claude_to_obsidian.py):

The script should:

• Read each exported .md file
• Detect origin (Code vs Web)
• Generate automatic tags based on content keywords
• Add standardized YAML frontmatter
• Insert [[wikilinks]] for notes that already exist in the vault
• Copy to chats/code/ or chats/web/ inside the vault

Example keyword-to-tag mapping:

KEYWORD_TAG_MAP = {
    "python": "python",
    "react": "react",
    "supabase": "supabase",
    "deploy": "deploy",
    "bug": "debugging",
    "refactor": "refactoring",
    # add your own
}

4. Create the automation script (~/scripts/sync_claude_obsidian.sh):

#!/bin/bash
EXPORT_DIR="$HOME/claude-exports"
VAULT_DIR="$HOME/vault"  # adjust to your path
SCRIPT_DIR="$HOME/scripts"
LOG="$SCRIPT_DIR/sync.log"

echo "[$(date)] Sync started" >> "$LOG"

# Export Claude Code chats
claude-extract --all --output "$EXPORT_DIR/code" 2>> "$LOG"

# Process and send to vault
python3 "$SCRIPT_DIR/claude_to_obsidian.py" \
    --export-dir "$EXPORT_DIR" \
    --vault-dir "$VAULT_DIR" \
    --move 2>> "$LOG"

echo "[$(date)] Sync completed" >> "$LOG"

5. Schedule automatic execution:

chmod +x ~/scripts/sync_claude_obsidian.sh

# Run daily at 10 PM
(crontab -l 2>/dev/null; echo "0 22 * * * $HOME/scripts/sync_claude_obsidian.sh") | crontab -

6. For Claude Web chats:

Install the "Export Claude Chat to Markdown" browser extension for Chrome/Edge. Do periodic bulk exports, save the .md files to ~/claude-exports/web/, and the cron job handles the rest.

7. Add a section to the vault's CLAUDE.md:

## Chat Import Pipeline

### Structure
- `chats/code/` → imported Claude Code conversations
- `chats/web/` → imported Claude Web/App conversations
- All chats get frontmatter with `type: chat` and `chat-import` tag

### Filter in Graph View
- `tag:chat-import` → chats only
- `-path:chats` → hide chats

Part 3 — Graphify (Codebase Knowledge Graph)

Concept

Graphify transforms your codebase into a queryable knowledge graph. Instead of Claude Code re-reading every file, it queries the graph — which is persistent across sessions and costs a fraction of the tokens.

• Code: processed 100% locally via tree-sitter AST. No code content leaves your machine.
• Cache: SHA256 — re-runs only process modified files.
• Cost: 0 tokens in default mode (pure AST). --deep mode uses LLM for semantic edges.
• Languages: Python, JavaScript, TypeScript, Go, Rust, Java, C, C++, Ruby, C#, Kotlin, Scala, PHP, Swift, Lua, Zig, and more (20 languages via tree-sitter).

Setup

1. Install:

pip install graphifyy
graphify install --platform claude

graphify install --platform claude creates the skill at ~/.claude/skills/graphify/SKILL.md. Other platforms are also supported (cursor, codex, opencode, etc.).

1.5. Set up API key (required for semantic extraction):

Graphify needs an LLM API key from Anthropic or Moonshot (Kimi) for semantic extraction. Export one before running:

export ANTHROPIC_API_KEY="your-key-here"
# or
export MOONSHOT_API_KEY="your-key-here"

If you want to skip LLM costs entirely, use AST-only mode:

graphify extract . --out ./graphify-out --no-cluster

This generates a structural graph without semantic edges.

2. Generate the graph:

Graphify has two execution paths and the original --obsidian* flags only work on one of them. Pick the form that matches how you're invoking it:

A. Inside Claude Code (skill — recommended for this guide):

/graphify . --obsidian --obsidian-dir ~/vault/graphify/project-name

This runs the /graphify slash command, which the skill at ~/.claude/skills/graphify/SKILL.md parses. The skill calls graphify.export.to_obsidian() in Python directly, so --obsidian and --obsidian-dir are recognized here — they're not part of the headless shell parser.

B. From the terminal / CI (headless CLI):

graphify extract . --out ./graphify-out

The headless CLI uses subcommands (extract, update, watch, tree) and does not expose --obsidian / --obsidian-dir / --wiki / --mode deep. If you want Obsidian integration from the terminal, symlink the output directory into your vault after extraction:

ln -s $(pwd)/graphify-out ~/vault/graphify/project-name/graphify-out

Generated output (varies by path and flags):

your-project/
└── graphify-out/
    ├── graph.json          # queryable graph (always)
    ├── graph.html          # interactive viz (skill auto-generates; headless: see step 3)
    ├── GRAPH_REPORT.md     # god nodes, connections, metrics (always)
    ├── wiki/               # Wikipedia-style articles (skill form with --wiki only)
    └── cache/              # SHA256 cache

~/vault/graphify/project-name/    # only when skill form was given --obsidian
    └── (Obsidian notes)          # one note per function/module

3. Generate interactive visualization (headless only):

The skill auto-generates graph.html during extraction. For the headless path, run the visualization as a separate step:

graphify tree --graph ./graphify-out/graph.json --output ./graphify-out/GRAPH_TREE.html

Open the HTML file in a browser to explore the graph interactively.

4. Update .gitignore:

# Graphify
graphify-out/cache/

Keep graph.json and GRAPH_REPORT.md versioned — they're useful for the team.

5. Add to the project's CLAUDE.md:

Append to the CLAUDE.md at the repository root:

## Context Navigation (Graphify)

### 3-Layer Query Rule
1. **First:** query `graphify-out/graph.json` or `graphify-out/wiki/index.md`
   to understand code structure and connections
2. **Second:** query the Obsidian vault for decisions, progress, and project context
3. **Third:** only read raw code files when editing
   or when the first two layers don't have the answer

### When to rebuild the graph
- After structural changes (new modules, major refactors)
- Headless: `graphify update .` (only processes modified files)
- Skill: `/graphify . --update` (same behavior, runs through the skill — also accepts `--obsidian` to refresh the vault)
- The graph is persistent — NO need to rebuild every session

### Do NOT
- Don't manually modify files inside `graphify-out/`
- Don't re-read the entire codebase if the graph already has the information

6. Add to the vault's CLAUDE.md:

## Graphify (Codebase Maps)

### Structure
- `graphify/project-x/` → knowledge graph for project X
- Future projects get their own subfolders
- Notes are auto-generated — do NOT edit manually

### In Graph View
- Filter by `path:graphify` to see only code nodes
- Filter by `-path:graphify` to hide code nodes

7. Git Hook (optional):

Automatically rebuilds the graph on every commit:

graphify hook install

8. Watch Mode (optional):

Auto-rebuild on file save. Pick the form that matches how you invoke graphify.

Headless (separate terminal):

graphify watch .

Skill (inside Claude Code):

/graphify . --watch

Useful Commands

The table below lists the headless CLI subcommands you'd run in a terminal. Inside Claude Code, the same operations are available via the /graphify slash form documented in ~/.claude/skills/graphify/SKILL.md — that form additionally supports --obsidian, --obsidian-dir, --wiki, and --mode deep (which the headless parser doesn't expose).

Adding New Projects

With a centralized vault, each project is just a subfolder. Same two paths as the initial setup.

Skill (inside Claude Code):

/graphify ~/another-project --obsidian --obsidian-dir ~/vault/graphify/another-project

Headless (terminal):

cd ~/another-project
graphify extract . --out ./graphify-out
ln -s $(pwd)/graphify-out ~/vault/graphify/another-project/graphify-out

Drop the ln -s line if you don't need Obsidian to pick up the graph. Notes appear in Obsidian's graph view alongside everything else.

Part 4 — Complete Workflow

Typical session

Open Claude Code session
    │
    ├── /resume                      ← loads vault context
    │                                   (recent logs, decisions, progress)
    │
    ├── Claude queries graph.json     ← understands code structure
    │                                   without re-reading all files
    │
    ├── Work on code                  ← features, bugs, refactors
    │
    ├── /save                        ← generates session log in vault
    │
    └── git commit                   ← hook rebuilds graph automatically

Savings per layer

Graph View Filters

Part 5 — Auto-Save Hook (Safety Net)

Concept

The /save command produces rich session logs, but it depends on you remembering to run it. Forget it once and the session vanishes. This hook fixes that: Claude Code fires a SessionEnd event when a session closes (exit, /clear, logout), and a small Python script mechanically extracts the session facts from the transcript and writes a minimal log to your vault.

Design principles (inspired by ai-memory):

• Zero LLM calls. Pure JSONL parsing. Runs in milliseconds, needs no API key.
• Safety net, not replacement. /save remains the rich log (decisions, pending items, wikilinks). The auto-log guarantees forgotten sessions still leave a trace: objective (first prompt), files touched, commands executed, stats.
• Silent failure. A hook must never break your session. Errors go to ~/scripts/autosave.log and Claude Code never notices.
• Noise filter. Sessions with fewer than 2 user messages are skipped.

Setup

1. Copy the script:

The script lives in this repo at scripts/session_autosave.py.

mkdir -p ~/scripts
cp scripts/session_autosave.py ~/scripts/
chmod +x ~/scripts/session_autosave.py

2. Register the hook in ~/.claude/settings.json:

If the file already exists, merge the hooks key without removing anything else:

{
  "hooks": {
    "SessionEnd": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "VAULT_DIR=$HOME/vault python3 $HOME/scripts/session_autosave.py"
          }
        ]
      }
    ]
  }
}

Adjust VAULT_DIR to your vault path.

3. Test:

Open a Claude Code session in any project, exchange 2-3 messages with a file edit, then exit. Check:

tail -5 ~/scripts/autosave.log
# should show: OK: wrote /path/to/vault/.../logs/YYYY-MM-DD-HHMM-auto-session.md

How routing works

The script derives the project name from the session's working directory (cwd basename):

• If // exists → log goes to //logs/
• Otherwise → falls back to /logs/

If your repo folder name differs from the vault folder name (e.g. repo my-app-monorepo, vault folder my-app), create a symlink:

ln -s ~/vault/my-app ~/vault/my-app-monorepo

Filtering auto-logs in Obsidian

Auto-logs get the auto-log tag and status: imported frontmatter:

Updated workflow

Open Claude Code session
    │
    ├── /resume                      ← loads vault context
    ├── Work on code
    ├── /save (optional)             ← rich log with decisions
    └── exit                         ← SessionEnd hook fires
                                        auto-log written even if
                                        you forgot /save

Real Results

Author-reported example from a React + Supabase project with 126 TypeScript files. The source snapshot, graph, prompts, tokenizer and usage logs were not published, so these inventory counts and the token ratio cannot currently be reproduced:

Evidence and benchmark

The historical 71.5x per session headline is not supported by a published session ledger. The ~20,000 / ~280 illustration gives ~71.4x for retrieval context (about 98.6% less), while 499x per query is a separate undocumented comparison. Neither establishes end-to-end session savings or dollar savings.

Hlido reports 82/100 for its repository review; the accessible public evidence does not validate these token ratios. See issue #12 and the evidence audit and benchmark protocol for provenance, date discrepancies, assumptions and limitations.

The protocol defines fixed inputs, paired source-navigation and memory arms, correctness criteria, cache accounting, graph construction costs, and separate query/session measurements. An offline usage summarizer is included. Its synthetic fixture checks arithmetic only; no new performance results or paid runs are claimed.

Architecture

┌─────────────────────────────────────────────────────────────┐
│                    OBSIDIAN VAULT (single)                   │
│                                                             │
│  permanent/  ← consolidated knowledge (Zettelkasten)        │
│  logs/       ← session logs (/save)                         │
│  chats/      ← imported conversations (cron pipeline)       │
│  graphify/   ← codebase knowledge graphs                    │
│  project-x/  ← MOCs, decisions, architecture                │
│                                                             │
│  CLAUDE.md   ← global instructions for Claude Code          │
└─────────────────────────┬───────────────────────────────────┘
                          │
                    Claude Code reads/writes
                          │
┌─────────────────────────┴───────────────────────────────────┐
│                   PROJECT REPOSITORY                         │
│                                                             │
│  src/            ← source code                              │
│  CLAUDE.md       ← project instructions + Context Nav       │
│  graphify-out/   ← graph.json, graph.html, report           │
│  .git/hooks/     ← post-commit rebuilds the graph           │
└─────────────────────────────────────────────────────────────┘

Troubleshooting

Graphify notes don't appear in Obsidian: Confirm the notes are inside the actual vault directory. Obsidian doesn't always point where you think — create a note in Obsidian and run find ~ -name "note-name.md" to discover the real path. Then move the notes there and Cmd+Q / reopen.

Graph view empty with filter applied: Disable "Orphans" and "Existing files only" in the graph filters. Cmd+Q and reopen Obsidian to force reindexing.

Claude Code doesn't query the graph: Check that the project's CLAUDE.md has the "Context Navigation" section and that graphify-out/graph.json exists at the repo root.

Cron doesn't run (macOS): Grant Full Disk Access to your terminal in System Preferences → Privacy & Security.

Graphify doesn't generate wiki: The wiki/ folder is only produced by the skill form with --wiki (/graphify . --wiki inside Claude Code). The headless graphify extract subcommand doesn't expose --wiki. From the terminal, use graphify query "question" against graph.json instead, or run the skill form if you need the Wikipedia-style articles.

Files with parentheses in name: Graphify generates notes like myFunction().md. Obsidian may struggle indexing files with () in the name. If needed, batch rename:

cd ~/vault/graphify/project
for f in *"("*; do mv "$f" "$(echo "$f" | sed 's/[()]//g')"; done

Unknown Command error in graphify: If graphify . errors with unknown command '.', you're running the headless CLI — which requires a subcommand (extract, update, watch, etc.) before the path. Either use the headless form:

graphify extract . --out ./graphify-out
# or, to refresh an existing graph:
graphify update .

Or, inside Claude Code, use the skill form with the leading slash — which routes through the /graphify skill rather than the shell parser and supports the full flag set (--obsidian, --obsidian-dir, --wiki, --mode deep, etc.):

/graphify . --obsidian --obsidian-dir ~/vault/graphify/project-name

Credits & Links

• Graphify — codebase knowledge graphs (MIT)
• Obsidian — PKM and second brain (free)
• Claude Code — Anthropic's coding agent
• Inspired by Andrej Karpathy's system and the r/ClaudeAI community

If this guide helped you, give the repo a ⭐ and share it with other devs using Claude Code.