Merge pull request #25 from thinkgrid-labs/feat/code-graph

Feat/code graph

Author: akosidencio

.diffmind/.gitignore

@@ -0,0 +1,10 @@
+# Written by diffmind. Generated state — not worth committing.
+# Deliberately absent: rules/, rules.toml, config.toml, baseline.json.
+cache/
+runs/
+models/
+graph.db
+graph.db-wal
+graph.db-shm
+symbols.json
+daemon.json

CHANGELOG.md

@@ -20,6 +20,23 @@ else's branch. Both surfaces share one engine; neither replaces the other.
 
 ### Added
 
+- **Code graph.** A tree-sitter symbol graph for 13 languages — Rust,
+  TypeScript, TSX, JavaScript, Python, Go, Java, C#, Ruby, PHP, C, C++ and
+  Scala — stored in `.diffmind/graph.db` and updated incrementally
+  by mtime. Replaces the regex symbol index, which could only see `pub`/`export`
+  declarations and had no concept of a reference at all.
+  Review context now includes **the callers of every changed symbol** — a
+  changed signature is judged against the code that depends on it — plus the
+  enclosing definition, referenced definitions, and the file's tests. Everything
+  stays inside a byte budget, so context does not grow with the repository.
+  Bodies are read from the working tree rather than stored, so a snippet can
+  never disagree with the file being reviewed. Adding a language is one entry in
+  a table; contributions welcome.
+
+- **Cross-file review units.** When a symbol and code that calls it both change
+  in one diff, they are reviewed together as a single unit instead of separately.
+  Reviewed apart, the model judges an interaction while seeing only one side of
+  it as background. One call replaces two.
 - **Reviewer's cockpit** (`diffmind --tui`). Analyses on launch. Each finding
   shows the actual hunk the model reviewed and the context it was given.
   `a` accepts (and copies a review comment via OSC 52, which works over SSH),

README.md

@@ -26,3 +26,18 @@ sysinfo = { workspace = true }
 toml = { workspace = true }
 # Model download checksums and the daemon's auth token.
 sha2 = { workspace = true }
+tree-sitter = "0.26"
+tree-sitter-rust = "0.24"
+tree-sitter-python = "0.25"
+tree-sitter-javascript = "0.25"
+tree-sitter-typescript = "0.23"
+rusqlite = { version = "0.40", features = ["bundled"] }
+streaming-iterator = "0.1.9"
+tree-sitter-go = "0.25"
+tree-sitter-java = "0.23"
+tree-sitter-ruby = "0.23"
+tree-sitter-php = "0.24"
+tree-sitter-c-sharp = "0.23"
+tree-sitter-scala = "0.26"
+tree-sitter-c = "0.24"
+tree-sitter-cpp = "0.23"