* chore: prefer es-toolkit helpers and lint the mechanical cases
AGENTS.md now names the es-toolkit helpers to reach for instead of hand-written equivalents, and the exceptions: a single clear native call or a measured hot path. The new open-pencil/prefer-es-toolkit rule rejects filter(Boolean) and Set round trips on arrays, the two cases that need no type information, and the existing 45 sites use compact and uniq. tools/ci/policy runs before dependencies are installed, so the rule is off there.
* refactor: deduplicate diagnostic categories with uniq
* fix: keep es-toolkit out of serialized Playwright callbacks
The codemod rewrote a filter(Boolean) inside a page.evaluate callback, which Playwright runs in the page where the compact import does not exist. The spec filters there again, and the rule now skips callbacks passed to evaluate, $eval, $$eval, evaluateHandle, addInitScript and waitForFunction, and filter calls on iterators from values, keys, entries and matchAll, which compact cannot take.
* test: write the prefer-es-toolkit cases like the other rule tests
Short standalone snippets, as in the base64 and JSON rule tests, instead of a declaration prefix on every case and inline object types.
* ci: run CI and the PR title check for the merge queue
A merge queue tests each queued change on top of the ones ahead of it and
waits for the required checks, CI result and PR title, on that merge
group. Both workflows now run on merge_group, reading the base and head
from either event. The title was checked on the pull request, so the
queue run reports success without a title to read.
* docs: explain stacked pull requests and the merge queue
Agents had to be told what a stacked pull request is each time.
CONTRIBUTING.md now covers stacks with gh stack, keeping them linear,
and landing them through the merge queue; AGENTS.md links to it, and
tools/AGENTS.md records that required checks must run on merge_group.
* docs: shorten the stacked pull request and merge queue guidance
The AGENTS.md line loads into every agent context, so keep it to the
rules; CONTRIBUTING.md keeps the commands.
Tools live under tools/<role>/<domain> (checks, generate, release, ci, dev), every tool is a workspace named @open-pencil/<domain>-tools, a shared tools/tsconfig.json backs the new check:tools gate that fixed 55 latent type errors, test:tools runs through bun --filter, the placement check is its own checks/test-homes package, and every tool resolves the repository through resolveWorkspaceRoot. Bun, Node, and mdast types live in a tools-root workspace so they never reach the app program.
Scene Graph unit tests move to packages/scene-graph/tests with a package-local assert helper and test type-checking; five Core- and fig-owned tests move to their owners' engine homes. check:test-homes rejects any new test under tests/engine against a reviewed baseline so the migration debt only shrinks.
Root AGENTS.md becomes a map plus cross-cutting rules; folder rules live in one AGENTS.md per package and top-level folder, checked by check:docs. CONTRIBUTING.md owns process; README and the docs page link to it. Release preparation copies the root LICENSE into every published package, Core, CLI, and MCP gain READMEs, and the release workflow test packs its fixture in-process instead of through npm.
