- Raised the Bun minimum version to >=1.3.14 across package metadata, install scripts, and changelog notes.
- Removed the Photon native image pipeline and added SIXEL-based `sixel` support in pi-natives.
- Migrated coding-agent image handling and resizing to `Bun.Image`, including updated tests and a JPEG quality bump to 80.
- Added HTTP/2 fetch bootstrap with HTTPS-only fallback and updated Bun build flags for autoload suppression/`--keep-names`.
- Added unified isolation primitives (BackendKind, ProbeResult, IsoError) and resolve fallback selection logic.
- Added Diff, FileChange, and ChangeKind with default_diff choosing git mode or filesystem walk based on repository state.
- Added APFS/btrfs/zfs/reflink/overlayfs/projfs/rcopy/block-clone backends with platform-aware start, stop, and probe.
- Mapped backend operations to canonicalized paths, recursive clone helpers, rollback cleanup, and unavailable error mapping.
- Added unified native exports isoBackend/isoProbe/isoResolve/isoStart/isoStop/isoDiff and removed projfsOverlay APIs.
- Replaced task isolation resolver flow with ensureIsolation/cleanupIsolation and migrated mode handling to auto plus legacy-mode aliases.
- Removed ~1,500 lines of platform-specific process code from pi-natives/ps.rs, delegating to pi_shell::process.
- Removed PTY execution support from pi-shell and pi-natives, including portable-pty dependency.
- Exposed terminate_tree and wait_for_exit as public methods on pi_shell::process::Process.
- Added PTY flags to ShellRunOptions and ShellExecuteOptions and defaulted pty to false when unset.
- Routed PTY-enabled shell runs to a dedicated PTY runner and executed commands via `sh -lc` in a PTY.
- Handled PTY output with a dedicated thread, Chunk/Done events, child PGID cancellation, and drain-timeout cleanup.
- Added Unix-only PTY assertions and non-Windows native coverage for `executeShell` with `pty: true` and `/dev/` output checks.
- Added `portable-pty = "0.9"` (and lockfile update) to enable PTY execution in pi-shell.
- Updated the orchestration prompt to require that each `task` instructs subagents to skip all verification and formatting commands.
- Clarified that the orchestrator should perform linting, tests, and formatting once per phase across all changed files.
- Updated Rust dependency manifests in `pi-natives` and `session-stats` to newer versions of rayon, tiktoken-rs, tree-sitter grammars, and supporting crates.
- Synchronized `Cargo.lock` with the manifest updates, including package bumps for fancy-regex, serde_spanned, toml components, and winnow.
- Refreshed `package.json` and `bun.lock` catalog and lock entries for newer Bun, AWS SDK, AI, and tooling package versions.
- Added a new `tokens` module in `crates/pi-natives` using `tiktoken-rs`, exposing `count_tokens` and `count_tokens_batch` through N-API with `Encoding::O200kBase` as the default.
- Exported the `Encoding` enum plus token counting functions in `packages/natives/native` TypeScript declarations and JS runtime bindings.
- Registered `tiktoken-rs` in `crates/pi-natives/Cargo.toml` and updated `Cargo.lock` with its resolved dependency entries.
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