headroom/tests/parity/fixtures/diff_compressor/10f0106f40cbe2fa.json
chopratejas 0414cb70e4 feat(rust): scaffold workspace + parity harness (phase-0)
Bootstrap the Rust port of Headroom. Additive only — no existing Python
code modified. Ships the workshop, not the widgets.

Layout
  Cargo.toml (workspace) + rust-toolchain.toml
  crates/headroom-core    — transform library, stub only
  crates/headroom-proxy   — axum binary, /healthz only
  crates/headroom-py      — PyO3 cdylib, exposes headroom._core.hello()
  crates/headroom-parity  — Rust-vs-Python oracle harness + parity-run CLI

Tooling
  Makefile: test, test-parity, bench, build-proxy, build-wheel, fmt, lint
  .github/workflows/rust.yml: test, wheels (linux/mac), audit, parity-nightly
  deny.toml for cargo-deny

Parity corpus
  tests/parity/recorder.py + scripts/record_fixtures.py
  125 recorded fixtures across 5 leaf transforms (ccr, tokenizer,
  log_compressor, diff_compressor, cache_aligner)

Docs
  RUST_DEV.md — developer setup and workspace reference
  docs/spec/022-rust-migration.md — migration plan and stage breakdown

.gitignore: whitelist scripts/record_fixtures.py; ignore target/

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-24 13:39:48 -07:00

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{
"config": {
"always_keep_additions": true,
"always_keep_deletions": true,
"enable_ccr": true,
"max_context_lines": 2,
"max_files": 20,
"max_hunks_per_file": 10,
"min_lines_for_ccr": 50
},
"input": "diff --git a/src/main.rs b/src/main.rs\n--- a/src/main.rs\n+++ b/src/main.rs\n@@ -10,7 +10,7 @@\n unchanged_line_0\n unchanged_line_1\n unchanged_line_2\n unchanged_line_3\n unchanged_line_4\n- let x = 1;\n+ let x = 2;\n unchanged_after_0\n unchanged_after_1\n unchanged_after_2\n unchanged_after_3\n unchanged_after_4\n# variant 0",
"input_sha256": "10f0106f40cbe2faa4471f44c8469acc2a7cd9cf36ba23f4c895f365cf85b298",
"output": {
"additions": 0,
"cache_key": null,
"compressed": "diff --git a/src/main.rs b/src/main.rs\n--- a/src/main.rs\n+++ b/src/main.rs\n@@ -10,7 +10,7 @@\n unchanged_line_0\n unchanged_line_1\n unchanged_line_2\n unchanged_line_3\n unchanged_line_4\n- let x = 1;\n+ let x = 2;\n unchanged_after_0\n unchanged_after_1\n unchanged_after_2\n unchanged_after_3\n unchanged_after_4\n# variant 0",
"compressed_line_count": 17,
"deletions": 0,
"files_affected": 0,
"hunks_kept": 0,
"hunks_removed": 0,
"original_line_count": 17
},
"recorded_at": "2026-04-23T23:51:37.349228+00:00",
"transform": "diff_compressor"
}