whamp codegraph
codegraph builds a function-level dependency graph of the whole repo
(tree-sitter) and lets you query it. In this environment the binary is at
/arm/bin/cg — call it by full path.
Build once at the start
/arm/bin/cg build .
Creates .codegraph/graph.db. Takes ~1-2s for most repos. Idempotent.
The queries that matter for safe edits
Before changing a symbol, check its blast radius.
| Question | Command |
|---|---|
| What symbols are in this file, and how many callers does each have? | /arm/bin/cg brief <file> |
| Who calls this symbol (callers / fan-in, tests excluded)? | /arm/bin/cg where <SymbolName> -T |
| What breaks transitively if this symbol changes? | /arm/bin/cg fn-impact <SymbolName> |
| Full context: source + deps + callers + tests? | /arm/bin/cg context <SymbolName> |
| What does this file import / what imports it? | /arm/bin/cg deps <file> |
brief is the cheap first look (one line per symbol with a caller count and a
risk tier like [utility, 2 callers] or [core, 7 callers]). where/fn-impact
give you the actual caller names when a count looks dangerous.
Reading the risk tier
brief tags each symbol: core (heavily depended on), utility, leaf
(no callers), dead-ffi/dead. A core symbol with many callers is high blast
radius — changes ripple widely.
When to use it
- Before editing a function/type/method you didn't just write: run
whereto see callers, orbriefon the file for a quick scan. - When a fix might need to touch a shared helper: run
fn-impactfirst. - You do not need it for files you are creating from scratch.