- Updated JS eval helper option parsing to accept positional optional args or a trailing plain-object options argument, while rejecting mixed or invalid forms.
- Updated `read` to route non-`local://` URI paths through the `read` tool with line selectors so offset/limit slicing works for artifact-style resources.
- Expanded JS executor tests for positional reads, nullable slot skipping, and delegated URI read slicing.
single OutputSink owner per cell artifact; JS parallel() honors its documented barrier (allSettled) instead of orphaning in-flight thunks; Python subprocesses no longer inherit the NDJSON frame pipe (stdout captured and forwarded); JS timeouts annotate the VM reset; console bridge implements dir/time/group/assert/trace; python availability probe cached; runner frames coalesce per write.
Worker-ready wait reused Bun's 5s default per-test timeout as its floor, so a slow cold-start under --isolate + high CI concurrency was aborted at 5s. The catch then terminate()s a still-initializing Bun worker -- the documented SIGILL/SIGTRAP crash trigger -- crashing the whole test file and intermittently failing unrelated PRs.
Introduce WORKER_INIT_TIMEOUT_MS=15s as a fixed infrastructure floor (independent of, still dominated by, a larger per-cell timeout) and set a 20s file-local setDefaultTimeout in js-executor/js-workflow-helpers tests so cold starts complete instead of being torn down.
- Added `providerRetryWait` and `retryWait` hooks to stream/usage options so tests bypass real scheduler delays.
- Parameterized GitHub Copilot poll intervals and Copilot model retry base delay for fast test execution.
- Replaced `Bun.sleep`/`setTimeout` polling loops with `AbortSignal` event listeners in agent session tests.
- Consolidated auth-gateway E2E helpers into a shared `test/helpers` module, eliminating duplicated `checkGatewayAvailable` implementations.
- Migrated credential-disabled tests from SQLite-backed stores to an in-memory store, removing temp-dir lifecycle overhead.
- Detected async wrapper need via AST traversal instead of regex, enabling pre-demote analysis.
- Published demoted var bindings back to `this` (worker global) when inside the async wrapper, preventing function-scope from hiding them across cells.
- Added `collectBindingNames`/`getLexicalBindingNames` to extract names from destructured patterns.
- Added canonical `pi.zod` schema API exports and removed TypeBox package exports/imports.
- Migrated Tool schema typing from TypeBox to shared `TSchema`/Zod flow with legacy TypeBox compatibility.
- Updated AI provider adapters and MCP/agent builders to convert tool params through `toolWireSchema()`.
- Reworked schema validation from AJV to Zod-safe parsing with `fromTypeBox`, `toolWireSchema`, and meta schema checks.
- Handled structured-clone failures in JsRuntime.display by falling back to text output.
- Added regression coverage for non-structured-cloneable JS display output.
- Added a follow_links flag to ScanOptions and build_walker so callers could control symlink traversal.
- Updated scan callsites so ast, glob, and grep continued skipping symlinks while fd's fuzzy-find enabled link following.
- Updated fd scoring to favor fuzzy basename matching for queries without '/', reducing matches based only on ancestor directory names.
- Added a stripTypeScript pass that heuristically detects TypeScript-like syntax and transpiles it with Bun's ts loader before rewriting.
- Integrated the new pass into wrapCode so import and lexical rewrites operate on transpiled input.
- Added an executeJs test that verifies interfaces, type annotations, and type assertions execute to the expected numeric result.
- Added a static-import rewriter that converts common import clauses into dynamic `await import(...)` expressions before VM wrapping.
- Provided `require` and `createRequire` globals in the JS VM context using a cwd-based resolver.
- Added executor tests confirming rewritten imports run correctly and that `require`/`createRequire` are exposed with expected behavior.
- Updated AGENTS.md discovery to use glob search honoring .gitignore, depth limits, and deduped results.
- Updated eval tool flow so Python preflight runs only when needed and exec now maps to eval when available.
- Deferred canonical model-index rebuilds during refresh/rebuildProvider and replayed pending rebuilds after resume.
- Added memoized model-equivalence resolution with trailing-marker and canonical reference caches.
- Optimized frontmatter key normalization to keep unchanged keys/arrays/objects without extra cloning.
- Updated JS executor tests to use base-path concatenation for nested fixture filesystem calls.
- Added a unified eval framework with parser grammar, backend interfaces, and JS/Python execution result types.
- Added eval tool docs and updated prompts for fenced cells, `eval.py`/`eval.js`, and fallback behavior.
- Replaced the built-in `python` tool with `eval` across registry, rendering, interactive modes, and tool settings.
- Migrated Python execution runtime from `src/ipy` to `src/eval/py`, renamed state fields, and removed legacy introspection.
- Refactored browser tooling from in-process VM helpers to worker-managed tab supervisors and protocol transport.
- Added eval parser fallback and JS tool-bridge tests, updated imports, and removed obsolete python-mode suites.
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