refactor: migrate to Session API with improved caching and cross-platform support (#89)

## Summary

Major refactoring of the task execution system with a new Session-based architecture, improved caching with detailed miss reasons, and comprehensive cross-platform support.

### Architecture Changes
- Migrate to new Session API, removing legacy code from `vite_task`
- Add new `vite_task_bin` crate for CLI and test infrastructure
- Implement event-based Reporter trait with `LabeledReporter` for formatted output
- Move cache status from Finish to Start event for immediate feedback

### Cache System Improvements
- Display specific cache miss reasons (env changes, input changes, cwd changes)
- Add option to disable cache per-task
- Show simplified cache status for single built-in commands
- Improve cache statistics display in execution summary

### Execution Infrastructure
- Implement `execute_spawn()` with fspy tracking for file system access monitoring
- Real-time output emission during spawn execution using `tokio::select!`
- Add `PostRunFingerprint` for content-based cache invalidation
- Support for synthetic tasks with `additional_envs` field

### Cross-Platform Fixes
- Windows path handling in snapshot redaction
- Use `@yarnpkg/shell` for cross-platform e2e tests
- Preserve Windows system env vars for cmd.exe compatibility
- Track `FindFirstFile`/`FindNextFile` on Windows for cache invalidation

### Testing
- Add comprehensive e2e test fixtures (cache-disabled, cache-keys, cache-miss-reasons, etc.)
- New snapshot test infrastructure with path and duration redaction
- Add `test_bins` utilities for testing (json-edit, print-env, print-file, replace-file-content)

### Other Changes
- Fix spelling: "Syntatic" → "Syntactic"
- Add workspace `node_modules/.bin` to session PATH
- Various CI workflow fixes

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Author: branchseer

.github/workflows/ci.yml

@@ -63,14 +63,21 @@ jobs:
         env:
           RUSTFLAGS: '-D warnings --cfg tokio_unstable' # also update .cargo/config.toml
 
-      # fspy contains tests for Node.js fs accesses.
-      # use x86_64 node for x86_64-apple-darwin target.
+      # Set up node and pnpm for running tests
+      # For x86_64-apple-darwin, use x64 node for fspy tests that verify Node.js fs accesses
       - uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
         with:
           node-version-file: .node-version
           architecture: x64
         if: ${{ matrix.target == 'x86_64-apple-darwin' }}
 
+      - uses: oxc-project/setup-node@fdbf0dfd334c4e6d56ceeb77d91c76339c2a0885 # v1.0.4
+        if: ${{ matrix.target != 'x86_64-apple-darwin' }}
+
+      # `pnpm install` prepares test bins used in snapshot tests
+      # Must run after setup-node so correct native binaries are installed
+      - run: pnpm install
+
       - run: cargo test --target ${{ matrix.target }}
         if: ${{ matrix.os != 'ubuntu-latest' }}
 

.gitignore

@@ -5,3 +5,4 @@ dist
 *.tsbuildinfo
 .DS_Store
 /.vscode/settings.json
+*.snap.new

Cargo.lock

@@ -54,10 +54,10 @@ compact_str = "0.9.0"
 const_format = "0.2.34"
 constcat = "0.6.1"
 copy_dir = "0.1.3"
+cow-utils = "0.1.3"
 crossterm = { version = "0.29.0", features = ["event-stream"] }
 csv-async = { version = "1.3.1", features = ["tokio"] }
 ctor = "0.6"
-dashmap = "6.1.0"
 derive_more = "2.0.1"
 diff-struct = "0.5.3"
 directories = "6.0.0"
@@ -72,10 +72,8 @@ fspy_shared = { path = "crates/fspy_shared" }
 fspy_shared_unix = { path = "crates/fspy_shared_unix" }
 fspy_test_utils = { path = "crates/fspy_test_utils" }
 futures = "0.3.31"
-futures-core = "0.3.31"
 futures-util = "0.3.31"
 insta = "1.44.3"
-itertools = "0.14.0"
 libc = "0.2.172"
 memmap2 = "0.9.7"
 nix = { version = "0.30.1", features = ["dir"] }
@@ -91,6 +89,7 @@ rand = "0.9.1"
 ratatui = "0.29.0"
 rayon = "1.10.0"
 ref-cast = "1.0.24"
+regex = "1.11.3"
 rusqlite = "0.37.0"
 rustc-hash = "2.1.1"
 seccompiler = { git = "https://github.com/branchseer/seccompiler", branch = "seccomp-action-raw" }
@@ -119,9 +118,11 @@ twox-hash = "2.1.1"
 uuid = "1.18.1"
 vec1 = "1.12.1"
 vite_glob = { path = "crates/vite_glob" }
+vite_graph_ser = { path = "crates/vite_graph_ser" }
 vite_path = { path = "crates/vite_path" }
 vite_shell = { path = "crates/vite_shell" }
 vite_str = { path = "crates/vite_str" }
+vite_task = { path = "crates/vite_task" }
 vite_task_graph = { path = "crates/vite_task_graph" }
 vite_task_plan = { path = "crates/vite_task_plan" }
 vite_workspace = { path = "crates/vite_workspace" }