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v0.34.0.0 migration — recursive code intelligence

gbrain upgrade runs gbrain apply-migrations automatically. Most users won't need to do anything else. If you hit issues or want to verify the upgrade succeeded, run the steps below.

What changed

v0.34.0.0 ships the recursive code-intelligence layer on top of v0.33.3's MCP-exposed code-callers/callees/def/refs foundation:

Recursive walks (NEW for agents):

  • code_blast(symbol, depth=5, max_nodes=200) — recursive callers walk with depth grouping. Use BEFORE editing any function.
  • code_flow(entry_point, depth=8, max_nodes=200) — recursive callees walk with terminal-sink tagging. Use when tracing how a request flows.
  • code_traversal_cache_clear — admin op for invalidating cached walks.

Foundation extensions:

  • W1: receiver-type resolution at extraction time. obj.method() now resolves to Class::method for the 3 MUST patterns in JS/TS/TSX + Python (import, this/self, new C()). Bare-token emit on miss (pre-W1 behavior).
  • W2: new imports and references edge types. JS/TS/TSX + Python get imports; TS gets type-position references. Ruby/Go/Rust/Java stay at calls-only.
  • W3b: code_traversal_cache table for memoizing blast/flow results. Cache invalidation honors the D3 cluster-generation counter.
  • W7: src/core/eval-capture-graph.ts — pure-function metrics module for replay-driven regression checks.

Mechanical migration

gbrain upgrade runs:

  1. bun install (refreshes deps; no new external deps in v0.34)
  2. gbrain post-upgrade → gbrain apply-migrations → migration v56 (code_traversal_cache_v0_34) creates the cache table on Postgres and PGLite.

If your agent uses code symbol-resolution heavily, also run:

gbrain edges-backfill --all-sources

This walks every content_chunks row whose edges_backfilled_at is NULL or older than EDGE_EXTRACTOR_VERSION_TS (bumped by v0.34 to re-walk every chunk with the new receiver-resolution + imports + references emission shape). Resumable; Ctrl-C is safe.

Verify

gbrain doctor --json | jq '.checks.code_intel_coverage'
gbrain call code_blast --symbol performSync
gbrain call code_flow --entry_point runCycle

Slip handling — what's NOT in v0.34.0.0

Per the plan's explicit slip-handling clause, the following ship in v0.34.1 after operator brain validation:

  • W4–5 Leiden clusters. Cluster ship gate (≤0.03 clusters/node) requires real brain data; v0.34.0.0 ships without clusters.
  • gbrain wiki — depends on clusters.
  • gbrain blast / gbrain flow CLI thin-shims. Use gbrain call code_blast --symbol <name> for v0.34.0.0; CLI wrappers come with v0.34.1.
  • eval-capture wiring — the metric module ships in v0.34.0.0; capture/replay dispatch on tool comes with v0.34.1.

If something fails

File an issue at https://github.com/garrytan/gbrain/issues with:

  • output of gbrain doctor
  • contents of ~/.gbrain/upgrade-errors.jsonl if it exists
  • which step broke