// ENGINEERING Mar 14, 2026 11 min read ● blast-radius / graph

Blast radius, calculated: how we model change impact across services.

The graph traversal that powers our impact analysis, why we cap it at depth-3 by default, and what we learned from teams who needed depth-7.

EM
Elena Markov
Indexer team

Long form coming soon.

Try this on your repos.

Beta is open. Five-minute setup. Source never leaves your network.

EM

Elena Markov

Indexer team

Elena leads the indexer at ArchMellon.

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api-gw auth order pay inv ledger notify audit
// ENGINEERING Apr 22 · 12 min

Tracing AMQP across 47 repositories without touching production.

How we built cross-repo edge resolution with sandboxed WASM plugins, why we abandoned static type-flow analysis halfway through, and the trick that finally made routing-key resolution deterministic.

EM
Elena Markov
Indexer team · Lead Engineer
// THINKING Apr 14 · 9 min

The third path: why YAML catalogues rot and runtime tracing misses the point.

Two well-trodden roads. Both fail at scale, for opposite reasons. The way out isn't picking one — it's noticing the architecture is already in your code.

AT
Anna Torres
Co-founder
.go tree- sitter
// ENGINEERING Apr 8 · 14 min

Why we ripped out our recursive AST walker (twice).

Stack overflows in production are humbling. Here's the iterative tree-sitter walker we landed on, what we got wrong, and why the fix was less code, not more.

DK
Dmitri Kovacs
Indexer team