codeatlas on Flask

The documentation codeatlas generated for Flask's own source code. It is published exactly as generated, with no edits.

How it was made

Source: Flask 3.2.0.dev at commit d73fa1c, the 24 files of src/flask.
Generator: codeatlas at commit 6836373, run as codeatlas --source flask/src/flask -o site.
Diagrams are drawn from Python's AST, with no LLM involved.
Sections are written by Claude Sonnet 5.5 (claude-sonnet-5-5), from code chosen by the project's structure (the request path for Data Flow, the exported classes for Key Classes) plus code retrieved from an index of OpenAI text-embedding-3-small embeddings.
The run took 41 seconds and cost $0.34 (42,372 input and 25,304 output tokens).

Five Claude agents, each reading Flask's source at that commit, fact-checked one section each, claim by claim.

Claims checked	Count
Correct	369
Imprecise (a detail off or overstated)	31
About Werkzeug or Jinja, and plausible	7
Wrong	2
Invented	0
Total	409

Every section was graded B: accurate, and publishable after small fixes. The problems they found:

Integration Points repeats a stale Flask docstring: Flask's Jinja environment does not prefix blueprint names to template names.
Overview places two factory methods on the wrong class.
Key Classes and Overview often list method names without saying what each method does.
Links to headings within a section do not work.