X-Ray Your Python Codebase in 0.2 Seconds — Without an LLM

A developer released code-atlas-py, a deterministic code intelligence tool that builds a full call graph, dependency graph, and symbol index of any Python project in about 0.2 seconds. The tool scores every function for risk based on complexity, coupling, and instability, and can be used to fail PRs that introduce high-risk code. It runs locally without an LLM or cloud dependency.

You inherit a 50k-line Python monolith. Senior dev who wrote it left last month. No tests, no docs, no architecture diagram. Where do you even start? Grep for imports? Parse the AST yourself? Spend two days drawing boxes and arrows in Mermaid? There's a faster way. Let me show you. code-atlas-py CLI: atlas is a deterministic code intelligence tool. It builds a full call graph, dependency graph, and symbol index of any Python project in ~0.2 seconds. It scores every function for risk — complexity, coupling, instability — and surfaces the most dangerous spots before you touch them. No LLM. No cloud. No tokens. Same result every run. pip install code-atlas-py That's it. No config file, no server, no database. It works on any Python project out of the box. cd /path/to/your/project atlas scan You'll see output like: ✓ Scanned 1,247 symbols in 0.19s Functions: 892 | Classes: 203 | Imports: 152 Top risk: payment/processor.py:process payment risk: 8.7 - complexity: 14 | coupling: 23 | instability: 0.87 The scan found your riskiest function before you opened a single file. atlas ask "which functions call process payment?" process payment ├─ checkout.create order checkout/orders.py:142 ├─ billing.sync subscriptions billing/sync.py:67 └─ webhooks.stripe handler webhooks/stripe.py:33 3 callers, 4 callees including 2 external API calls Risk impact if changed: high 3 downstream modules affected atlas html --open This opens a clickable, filterable call graph in your browser. Each node is colored by risk score. Click any function to see its callers, callees, and complexity breakdown. Filter to show only functions with risk 7 and instantly see the 5% of your codebase you should review before making any changes. atlas scan --fail-on-risk 8 --json atlas-report.json Fail a PR if it introduces code with risk score ≥ 8. No more merges that silently add coupling. Ship an HTML artifact alongside your test results. | Tool | What it does | Deterministic? | Local? | Free? | |---|---|---|---|---| | pylint/flake8 | Style + lint + simple complexity | Yes | Yes | Yes | | sourcegraph | Code search with indexing server | Yes | No | Subscription | | LLM code review | Ask "is this risky?" | No | Varies | Freemium | code-atlas-py | Call graph + risk scoring + symbol search | Yes | Yes | Free tier | getattr -based dispatch . pip install code-atlas-py cd your-project docker run -v $ pwd :/code --rm code-atlas-py atlas scan or just: atlas scan Repo: github.com/mete-dotcom/code-atlas https://github.com/mete-dotcom/code-atlas Site: massiron.com/atlas https://massiron.com/atlas What's the riskiest function in your codebase right now? Run atlas scan and find out.