Draft: feat(code-graph): utils for generic code indexing

Michael Usachenkorequested to merge
michaelusa/tree-dsl-vendor into main

What does this MR do and why?

Tracks the tree-dsl canonical experiment for the code-graph indexer. Spike: gitlab-org/orbit/experiments/orbit-next!219 (closed)

Summary

Code indexing pipeline but with canonical synthetic nodes. Every language produces the same output shapes through YAML-defined rewrite rules. SSA and resolver use synthetics directly — no coloring rules, no extraction DSL, no per-language configs.

  • 42/44 Python tests pass (parity with old pipeline)
  • -3,387 lines net, 5,528 lines total
  • 24 synthetic node kinds form the universal vocabulary
  • Verified across Python, TypeScript, Rust, Go, Ruby, Elixir, Lua, Haskell
Agent context

Design doc captured at ~/Desktop/tree-dsl-canonical-rewrites.md.

Edited by Michael Usachenko

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