diff --git a/.agents/README.md b/.agents/README.md
index d4fc8d1..84e2f33 100644
--- a/.agents/README.md
+++ b/.agents/README.md
@@ -10,8 +10,6 @@ update the canonical docs first.
 
 ## Skills
 
-- [`forms-core-implementation-step`](./skills/forms-core-implementation-step/SKILL.md)
-  - normal iterative implementation workflow.
 - [`forms-core-general-checks`](./skills/forms-core-general-checks/SKILL.md)
   - baseline verification before handoff, PR creation, and review replies.
 - [`forms-core-self-review`](./skills/forms-core-self-review/SKILL.md)
diff --git a/.agents/rules/read-review-contract.mdc b/.agents/rules/read-review-contract.mdc
index 05ed856..3f748ee 100644
--- a/.agents/rules/read-review-contract.mdc
+++ b/.agents/rules/read-review-contract.mdc
@@ -6,6 +6,6 @@ alwaysApply: true
 # Read Review Contract
 
 Start review and implementation work from `REVIEW.md`, then follow
-`docs/architecture.md`, `docs/steps.md`, `docs/pr-plan.md`,
-`docs/quality-gates.md`, `docs/readme-guidelines.md`, and
+`docs/architecture.md`, `docs/pr-plan.md`, `docs/quality-gates.md`,
+`docs/readme-guidelines.md`, `docs/release-train.md`, and
 `docs/review/forms-core-checklist.md`.
diff --git a/.agents/skills/forms-core-general-checks/SKILL.md b/.agents/skills/forms-core-general-checks/SKILL.md
index 4c041fb..519344c 100644
--- a/.agents/skills/forms-core-general-checks/SKILL.md
+++ b/.agents/skills/forms-core-general-checks/SKILL.md
@@ -37,7 +37,7 @@ ready, and after addressing review feedback.
    - `docs/architecture.md`;
    - `docs/quality-gates.md`;
    - `docs/review/forms-core-checklist.md`;
-   - affected step in `docs/steps.md`.
+   - `docs/release-train.md` for release or publish changes.
 
 ## Required Commands
 
diff --git a/.agents/skills/forms-core-implementation-step/SKILL.md b/.agents/skills/forms-core-implementation-step/SKILL.md
deleted file mode 100644
index acc4ddb..0000000
--- a/.agents/skills/forms-core-implementation-step/SKILL.md
+++ /dev/null
@@ -1,64 +0,0 @@
----
-name: forms-core-implementation-step
-description: >-
-  Implement the next scoped forms-core step by reading the architecture,
-  current step tracker, PR plan, and review contract; make only the intended
-  change, validate it, update docs/steps.md, and prepare concise handoff notes.
-metadata:
-  short-description: Implement next forms-core step
----
-
-# forms-core Implementation Step Skill
-
-Use this skill for normal implementation work in `forms-core`.
-
-## Goal
-
-Advance exactly one scoped step from `docs/steps.md` without drifting from the
-architecture contract.
-
-## Required Reading
-
-1. `AGENTS.md`
-2. `REVIEW.md`
-3. `docs/architecture.md`
-4. `docs/steps.md`
-5. `docs/pr-plan.md`
-6. `docs/review/forms-core-checklist.md`
-
-## Workflow
-
-1. Confirm branch and worktree:
-
-   ```bash
-   git status --short --branch
-   ```
-
-2. Identify the next unchecked step in `docs/steps.md`.
-3. Confirm the expected PR scope in `docs/pr-plan.md`.
-4. Implement only that scope.
-5. Add focused tests for real behavior.
-6. Run required validation.
-7. Update `docs/steps.md` in the same change.
-8. Run self-review before handoff.
-
-## Stop Conditions
-
-Stop and report the blocker when:
-
-- the requested step would require React/UI code;
-- a dependency outside the allowed list is needed;
-- TanStack form-core lacks a required behavior and the architecture needs a
-  decision;
-- validation cannot run.
-
-## Output Format
-
-```text
-Implementation step:
-- Step:
-- Files changed:
-- Validation:
-- docs/steps.md update:
-- Remaining risks:
-```
diff --git a/.agents/skills/forms-core-self-review/SKILL.md b/.agents/skills/forms-core-self-review/SKILL.md
index 5d43447..2f385df 100644
--- a/.agents/skills/forms-core-self-review/SKILL.md
+++ b/.agents/skills/forms-core-self-review/SKILL.md
@@ -26,7 +26,7 @@ description when requested, or PR comment.
 - `docs/quality-gates.md`.
 - `docs/readme-guidelines.md` when README changes.
 - `docs/review/forms-core-checklist.md`.
-- Affected step in `docs/steps.md`.
+- `docs/release-train.md` when release or publish behavior changes.
 
 ## Review Steps
 
diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-publish.yml
new file mode 100644
index 0000000..fb47251
--- /dev/null
+++ b/.github/workflows/npm-publish.yml
@@ -0,0 +1,22 @@
+name: Publish Package to npmjs
+
+on:
+  push:
+    tags:
+      - 'v[0-9]*.[0-9]*.[0-9]*'
+      - 'v[0-9]*.[0-9]*.[0-9]*-*'
+
+jobs:
+  publish:
+    permissions:
+      contents: read
+      id-token: write
+    uses: revisium/revisium-actions/.github/workflows/npm-publish.yml@184b609dcbc1e23f14021141f29226d4e6a0f1ac # v0.3.6
+    with:
+      node_version: 24.11.1
+      install_command: npm ci
+      npm_access: public
+      publish_auth: token
+      create_github_release: false
+    secrets:
+      NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
diff --git a/.github/workflows/release-train.yml b/.github/workflows/release-train.yml
new file mode 100644
index 0000000..544cf90
--- /dev/null
+++ b/.github/workflows/release-train.yml
@@ -0,0 +1,50 @@
+name: Release Train
+
+on:
+  workflow_dispatch:
+    inputs:
+      action:
+        description: Release train transition
+        required: true
+        type: choice
+        options:
+          - start-minor-alpha
+          - start-major-alpha
+          - start-minor-rc
+          - start-major-rc
+          - start-minor-stable
+          - start-major-stable
+          - alpha-bump
+          - promote-rc
+          - rc-bump
+          - stable
+          - patch
+          - patch-alpha-start
+          - patch-rc-start
+      dry_run:
+        description: Validate and show the computed release without pushing.
+        required: false
+        default: false
+        type: boolean
+
+concurrency:
+  group: ${{ github.repository }}-release-train
+  cancel-in-progress: false
+
+permissions:
+  actions: read
+  contents: read
+
+jobs:
+  release-train:
+    name: Release train
+    uses: revisium/revisium-actions/.github/workflows/release-train.yml@763f2746000f15842e642130dba3acf09c5d00ac # v0.3.2
+    with:
+      action: ${{ inputs.action }}
+      dry_run: ${{ inputs.dry_run }}
+      base_branch: master
+      node_version: 24.11.1
+      install_command: npm ci
+      validate_command: npm run verify
+    secrets:
+      RELEASE_BOT_PRIVATE_KEY: ${{ secrets.RELEASE_BOT_PRIVATE_KEY }}
diff --git a/AGENTS.md b/AGENTS.md
index 9b91d2f..3b58d2e 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -8,7 +8,7 @@ MCP memory when project context must be read or written.
 
 - **Docs first.** Before implementing behavior, read and update the matching
   source-of-truth doc: [docs/architecture.md](./docs/architecture.md),
-  [docs/steps.md](./docs/steps.md), [docs/pr-plan.md](./docs/pr-plan.md),
+  [docs/pr-plan.md](./docs/pr-plan.md),
   [docs/release-train.md](./docs/release-train.md),
   [docs/readme-guidelines.md](./docs/readme-guidelines.md),
   [docs/quality-gates.md](./docs/quality-gates.md), or [REVIEW.md](./REVIEW.md).
@@ -26,13 +26,7 @@ MCP memory when project context must be read or written.
   `@tanstack/form-core` and `mobx` unless the docs and user explicitly approve
   another dependency. Add test dependencies only when the repo lacks a suitable
   test runner.
-- **Update the step tracker.** Every implementation PR must update
-  [docs/steps.md](./docs/steps.md) with completed checks and remaining work.
-  The final cleanup PR removes or replaces this temporary tracker after durable
-  docs, tests, and README cover the result.
 - **Use repo-local skills when available.**
-  [`forms-core-implementation-step`](./.agents/skills/forms-core-implementation-step/SKILL.md)
-  is the normal iterative workflow.
   [`forms-core-general-checks`](./.agents/skills/forms-core-general-checks/SKILL.md)
   is the baseline verification workflow.
   [`forms-core-self-review`](./.agents/skills/forms-core-self-review/SKILL.md)
@@ -55,23 +49,15 @@ MCP memory when project context must be read or written.
 
 ## Quality Gates
 
-For this docs-only bootstrap phase:
-
-```bash
-git status --short --branch
-git diff --check
-```
-
-After the package scaffold lands, update this section and
-[docs/quality-gates.md](./docs/quality-gates.md), then use the repository
-scripts. The intended full gate is:
+Use the repository verification script before handoff, PR creation, or review
+replies:
 
 ```bash
 npm run verify
 ```
 
-The planned `verify` script should run TypeScript, lint, unit tests, build, and
-Markdown/skill checks.
+The `verify` script runs Markdown/skill lint, formatting, TypeScript, ESLint,
+unit tests with coverage, and package build.
 
 Sonar has zero-tolerance semantics for pull requests in this repo. A passing PR
 Quality Gate is not enough by itself: always inspect unresolved Sonar issues for
@@ -84,5 +70,5 @@ only when the repo permits it.
 ## Handoff
 
 Start from [docs/handoff/README.md](./docs/handoff/README.md). It links the
-implementation steps, review contract, architecture, and reusable bootstrap
-pattern for other libraries.
+review contract, architecture, quality gates, release docs, and reusable
+bootstrap pattern for other libraries.
diff --git a/README.md b/README.md
index 51398ef..d7d97a7 100644
--- a/README.md
+++ b/README.md
@@ -1,78 +1,307 @@
 # forms-core
 
-Headless TypeScript form library for Revisium projects.
-
-`@revisium/forms-core` will wrap `@tanstack/form-core` with a MobX-native public
-API. It is intentionally not a React package: forms must live outside component
-lifecycle, and consumers should observe public getters with MobX `computed`,
-`reaction`, and `autorun` without subscribing to TanStack stores directly.
-
-## Current Status
-
-This repository is in active implementation. The package scaffold, local
-toolchain, CI/Sonar wiring, private MobX selector bridge, scalar form/control
-wrappers, validation adapter, explicit server-error lifecycle, nested path
-controls, stable-id arrays, patch emission, and disposal hardening are in place.
-Final README/API polish is tracked in the implementation steps.
-
-## Start Here
-
-- [AGENTS.md](./AGENTS.md) - coding-agent boot rules.
-- [REVIEW.md](./REVIEW.md) - review contract for humans, bots, and agents.
-- [docs/architecture.md](./docs/architecture.md) - target architecture.
-- [docs/steps.md](./docs/steps.md) - temporary implementation tracker.
-- [docs/pr-plan.md](./docs/pr-plan.md) - intended PR sequence.
-- [docs/release-train.md](./docs/release-train.md) - npm release plan.
-- [docs/readme-guidelines.md](./docs/readme-guidelines.md) - README standard
-  for the public package.
-- [docs/quality-gates.md](./docs/quality-gates.md) - local, CI, Sonar, and
-  package checks.
-- [docs/handoff/README.md](./docs/handoff/README.md) - handoff entry point.
-
-## Package Goals
-
-- Use `@tanstack/form-core` as the form engine.
-- Provide a headless MobX-reactive API.
-- Keep React, Chakra, and UI components out of scope.
-- Keep TanStack store and error-map details private.
-- Support scalar controls, nested paths, stable-id arrays, validation, server
-  errors, patches for autosave, reset, submit, and disposal.
+Headless TypeScript forms over `@tanstack/form-core` with a MobX-native public
+API.
+
+[![CI](https://github.com/revisium/forms-core/actions/workflows/ci.yml/badge.svg)](https://github.com/revisium/forms-core/actions/workflows/ci.yml)
+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=revisium_forms-core&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=revisium_forms-core)
+[![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE)
+
+## Why
+
+`@revisium/forms-core` is for application state layers that need forms outside
+React component lifecycle. TanStack Form Core owns the form engine; this package
+adapts its stores into MobX-observable public getters so consumers can use
+`computed`, `reaction`, and `autorun` without subscribing to TanStack stores.
+
+The package is headless. It does not export React components, Chakra wrappers,
+or UI-specific hooks.
+
+## Install
+
+```bash
+npm install @revisium/forms-core @tanstack/form-core mobx
+```
+
+## Quick Start
+
+```ts
+import { reaction } from 'mobx';
+import { createForm, field } from '@revisium/forms-core';
+
+const form = createForm({
+  defaultValues: {
+    email: '',
+    password: '',
+  },
+  fields: {
+    email: field<string>({
+      validators: {
+        onChange: ({ value }) =>
+          value.includes('@') ? undefined : 'Invalid email',
+      },
+    }),
+    password: field<string>(),
+  },
+});
+
+const disposeReaction = reaction(
+  () => form.controls.email.value,
+  (email) => {
+    console.log('email changed', email);
+  },
+);
+
+form.controls.email.setValue('user@example.com');
+form.controls.email.blur();
+
+console.log(form.isValid);
+console.log(form.getRawValue());
+
+disposeReaction();
+form.dispose();
+```
+
+## Public API
+
+Create forms with `createForm({ defaultValues, fields, arrays, validators })`.
+
+Field controls are available under `form.controls`:
+
+```ts
+form.controls.email.value;
+form.controls.email.displayValue;
+form.controls.email.error;
+form.controls.email.visibleError;
+form.controls.email.isDirty;
+form.controls.email.isTouched;
+form.controls.email.isValidating;
+form.controls.email.setValue('user@example.com');
+form.controls.email.blur();
+form.controls.email.reset();
+```
+
+Form state is exposed through MobX-reactive getters:
+
+```ts
+form.isValid;
+form.isDirty;
+form.isTouched;
+form.isSubmitting;
+form.errors;
+form.getRawValue();
+await form.validate();
+await form.submit();
+form.reset();
+form.reset(nextValues);
+form.dispose();
+```
+
+Exports include `createForm`, `field`, `arrayField`, and public types for form
+options, controls, arrays, validators, patches, and listeners.
+
+## Validation
+
+Field validators support sync, async, debounce, submit, blur, and linked-field
+validation where TanStack Form Core supports the underlying behavior.
+
+```ts
+const form = createForm({
+  defaultValues: {
+    email: '',
+    confirmEmail: '',
+  },
+  fields: {
+    email: field<string>({
+      validators: {
+        onChange: ({ value }) =>
+          value.includes('@') ? undefined : 'Invalid email',
+        onChangeAsync: async ({ value, signal }) => {
+          await checkEmailAvailability(value, { signal });
+        },
+        onChangeAsyncDebounceMs: 300,
+      },
+    }),
+    confirmEmail: field<string>({
+      validators: {
+        onChangeListenTo: ['email'],
+        onChange: ({ value, values }) =>
+          value === values.email ? undefined : 'Emails must match',
+      },
+    }),
+  },
+});
+```
+
+Form-level validators can return a form error string or field errors:
+
+```ts
+declare function checkEmailAvailability(
+  value: string,
+  options: { signal: AbortSignal },
+): Promise<void>;
+
+const form = createForm({
+  defaultValues: {
+    password: '',
+  },
+  fields: {
+    password: field<string>(),
+  },
+  validators: {
+    onSubmit: ({ value }) => ({
+      fields: {
+        password: value.password ? undefined : 'Required',
+      },
+    }),
+  },
+});
+```
+
+## Server Errors
+
+`applyServerErrors()` accepts dot/bracket paths and exposes simple string errors
+on controls.
+
+```ts
+form.applyServerErrors({
+  email: 'Email already exists',
+  'members[0].name': 'Required',
+});
+
+form.controls.email.error;
+form.controls.email.visibleError;
+```
+
+Server errors are explicit external errors. They survive validation cycles, are
+visible immediately, clear when the relevant field value changes, and clear on
+`reset()`.
+
+## Arrays
+
+Use `arrayField({ getItemId })` for public array identity. `getItemId` must
+return a unique stable id for every item; public identity never relies on array
+indexes.
+
+```ts
+import { arrayField, createForm, field } from '@revisium/forms-core';
+
+const form = createForm({
+  defaultValues: {
+    members: [{ id: '1', name: '' }],
+  },
+  fields: {},
+  arrays: {
+    members: arrayField<{ id: string; name: string }>({
+      getItemId: (item) => item.id,
+    }),
+  },
+});
+
+form.arrays.members.items;
+form.arrays.members.push({ id: '2', name: 'Ada' });
+form.arrays.members.insert(1, { id: '3', name: 'Grace' });
+form.arrays.members.move(0, 1);
+form.arrays.members.removeById('2');
+form.arrays.members.clear();
+```
+
+Array items expose the current index, current value, stable id, and generated
+controls for object item fields:
+
+```ts
+const first = form.arrays.members.items[0];
+
+first?.id;
+first?.index;
+first?.value;
+first?.controls.name.setValue('Ada');
+```
+
+## Autosave Patches
+
+`onPatch(listener)` emits value patches by diffing previous and current form
+values. This is intended for autosave and persistence adapters.
+
+```ts
+import type { FormPatch } from '@revisium/forms-core';
+
+declare function queueAutosave(patch: FormPatch): void;
+
+const disposePatchListener = form.onPatch((patches) => {
+  for (const patch of patches) {
+    queueAutosave(patch);
+  }
+});
+
+form.controls.email.setValue('user@example.com');
+
+disposePatchListener();
+```
+
+Patch shape:
+
+```ts
+type FormPatch =
+  | { type: 'set'; path: string; value: unknown; previousValue: unknown }
+  | { type: 'remove'; path: string; previousValue: unknown }
+  | { type: 'insert'; path: string; index: number; value: unknown }
+  | { type: 'move'; path: string; fromIndex: number; toIndex: number }
+  | { type: 'clear'; path: string; previousValue: unknown[] };
+```
+
+Scalar and nested edits emit full paths such as `email` or `profile.name`.
+Configured arrays emit stable operation patches for `push`, `insert`,
+`removeAt`, `removeById`, `move`, and `clear`. Ambiguous bulk array changes fall
+back to a `set` patch for the array path.
+
+## React Usage
+
+React integration is consumer-side. Create and own the form in your application
+state layer, view model, or dependency-injection scope, then observe the public
+MobX getters from React through your chosen MobX React binding.
+
+This package intentionally does not import React or export React components.
+
+## Why Not @tanstack/react-form
+
+`@tanstack/react-form` is a React adapter. `forms-core` needs a headless MobX
+adapter that can live outside component lifecycle and be consumed by MobX
+`computed`, `reaction`, and `autorun`. Using the React adapter as the main API
+would make React a hidden runtime dependency and would not satisfy the
+MobX-native contract.
+
+## Limitations
+
+Known limitations and deliberate constraints are tracked in
+[docs/limitations.md](./docs/limitations.md).
 
 ## Development
 
-Use Node.js 20.16 or newer. The CI target currently uses Node.js 24.11.1.
+Use Node.js 24.11.1 or newer. CI runs the primary Sonar-enabled job on 24.11.1.
 
 ```bash
 npm ci
 npm run verify
 ```
 
-Useful local commands:
+Useful commands:
 
 - `npm run tsc` - TypeScript typecheck.
 - `npm run lint:ci` - ESLint with zero warnings.
 - `npm run test:cov` - Jest coverage output for Sonar.
-- `npm run sonar:local` - run Sonar locally from existing coverage.
-- `npm run sonar:issues:local` - fail on unresolved Sonar issues.
-- `npm run ci:local:sonar` - run local verify and then Sonar quality gate.
 - `npm run build` - package build and declaration output.
-- `npm run markdown:lint` - Markdown and agent-rule lint.
-- `npm run skills:lint` - repo-local agent skill structure lint.
-
-For local Sonar, either export `SONAR_TOKEN` in the shell or create an
-untracked `.env.sonar` from `.env.sonar.example`. Do not commit real Sonar
-tokens. Prefer running local Sonar after the branch has a GitHub PR: the script
-auto-detects the PR and runs PR analysis. Before a PR exists, Sonar falls back
-to branch analysis, which may be blocked by the organization plan.
+- `npm run ci:local:sonar` - run local verify, Sonar quality gate, and issue
+  inspection.
+- `npm pack --dry-run` - inspect package contents before publish.
 
 For PRs, do not treat Sonar `PASSED` as complete by itself. Inspect unresolved
 issues and fix every valid issue; this repo uses zero tolerance for PR Sonar
 issues. Pushes to `master` upload Sonar analysis but do not enforce total branch
 issue count.
 
-## Bootstrap Pattern
+## Release
 
-This repo intentionally starts with docs and local agent workflows before source
-code. See
-[docs/handoff/bootstrap-new-library-project.md](./docs/handoff/bootstrap-new-library-project.md)
-for the reusable pattern.
+Release and npm publish rules are documented in
+[docs/release-train.md](./docs/release-train.md). Publishing requires explicit
+approval and uses shared workflows from `revisium/revisium-actions`.
diff --git a/REVIEW.md b/REVIEW.md
index de74262..4b4983f 100644
--- a/REVIEW.md
+++ b/REVIEW.md
@@ -14,11 +14,10 @@ Before reviewing a PR, read:
 
 1. [docs/architecture.md](./docs/architecture.md)
 2. [docs/review/forms-core-checklist.md](./docs/review/forms-core-checklist.md)
-3. [docs/steps.md](./docs/steps.md) while implementation is in progress
-4. [docs/pr-plan.md](./docs/pr-plan.md)
-5. [docs/quality-gates.md](./docs/quality-gates.md)
-6. [docs/readme-guidelines.md](./docs/readme-guidelines.md) for README changes
-7. [docs/release-train.md](./docs/release-train.md) for publish or version work
+3. [docs/pr-plan.md](./docs/pr-plan.md)
+4. [docs/quality-gates.md](./docs/quality-gates.md)
+5. [docs/readme-guidelines.md](./docs/readme-guidelines.md) for README changes
+6. [docs/release-train.md](./docs/release-train.md) for publish or version work
 
 ## Source Of Truth
 
diff --git a/docs/README.md b/docs/README.md
index 8b86f1a..edecdfc 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1,25 +1,23 @@
 # forms-core Docs
 
-This directory is the implementation source of truth while the package is being
-built.
+This directory is the package source of truth for architecture, quality gates,
+release workflow, review policy, and reusable handoff guidance.
 
 ## Reading Order
 
 1. [Architecture](./architecture.md)
-2. [Implementation Steps](./steps.md)
-3. [PR Plan](./pr-plan.md)
-4. [Quality Gates](./quality-gates.md)
-5. [README Guidelines](./readme-guidelines.md)
-6. [Known Limitations](./limitations.md)
-7. [Release Train](./release-train.md)
-8. [Review Checklist](./review/forms-core-checklist.md)
-9. [Handoff](./handoff/README.md)
+2. [PR Plan](./pr-plan.md)
+3. [Quality Gates](./quality-gates.md)
+4. [README Guidelines](./readme-guidelines.md)
+5. [Known Limitations](./limitations.md)
+6. [Release Train](./release-train.md)
+7. [Review Checklist](./review/forms-core-checklist.md)
+8. [Handoff](./handoff/README.md)
 
 ## Source-Of-Truth Rules
 
 - Public API and behavior belong in `architecture.md`.
-- In-progress sequencing belongs in `steps.md`.
-- PR boundaries belong in `pr-plan.md`.
+- PR history and future maintenance boundaries belong in `pr-plan.md`.
 - Validation, CI, Sonar, and package checks belong in `quality-gates.md`.
 - Public package README shape belongs in `readme-guidelines.md`.
 - Release and npm publish rules belong in `release-train.md`.
diff --git a/docs/handoff/README.md b/docs/handoff/README.md
index d80a8dc..8bb54f6 100644
--- a/docs/handoff/README.md
+++ b/docs/handoff/README.md
@@ -7,44 +7,34 @@ This is the starting point for an agent or developer taking over the repository.
 1. [AGENTS.md](../../AGENTS.md)
 2. [REVIEW.md](../../REVIEW.md)
 3. [docs/architecture.md](../architecture.md)
-4. [docs/steps.md](../steps.md)
-5. [docs/pr-plan.md](../pr-plan.md)
-6. [docs/quality-gates.md](../quality-gates.md)
-7. [docs/readme-guidelines.md](../readme-guidelines.md)
-8. [docs/review/forms-core-checklist.md](../review/forms-core-checklist.md)
-9. [docs/limitations.md](../limitations.md)
-10. [docs/release-train.md](../release-train.md)
+4. [docs/pr-plan.md](../pr-plan.md)
+5. [docs/quality-gates.md](../quality-gates.md)
+6. [docs/readme-guidelines.md](../readme-guidelines.md)
+7. [docs/review/forms-core-checklist.md](../review/forms-core-checklist.md)
+8. [docs/limitations.md](../limitations.md)
+9. [docs/release-train.md](../release-train.md)
 
 ## Normal Iteration
 
 1. Check branch and worktree.
-2. Read the current unchecked item in [docs/steps.md](../steps.md).
-3. Confirm the PR scope from [docs/pr-plan.md](../pr-plan.md).
-4. Implement only that scope.
-5. Add or update tests for real behavior.
-6. Run required validation.
-7. Update [docs/steps.md](../steps.md).
-8. Run self-review against [REVIEW.md](../../REVIEW.md).
-9. Commit, push, or open a PR only when the user asks.
+2. Confirm the intended scope from [docs/pr-plan.md](../pr-plan.md) or the
+   current user request.
+3. Update durable docs when behavior, public API, release workflow, or review
+   policy changes.
+4. Add or update tests for real behavior.
+5. Run required validation.
+6. Run self-review against [REVIEW.md](../../REVIEW.md).
+7. Commit, push, or open a PR only when the user asks.
 
 ## Repo-Local Skills
 
 Use skills in this order:
 
-1. [`forms-core-implementation-step`](../../.agents/skills/forms-core-implementation-step/SKILL.md)
-   for normal implementation work.
-2. [`forms-core-general-checks`](../../.agents/skills/forms-core-general-checks/SKILL.md)
+1. [`forms-core-general-checks`](../../.agents/skills/forms-core-general-checks/SKILL.md)
    before handoff or PR updates.
-3. [`forms-core-self-review`](../../.agents/skills/forms-core-self-review/SKILL.md)
+2. [`forms-core-self-review`](../../.agents/skills/forms-core-self-review/SKILL.md)
    before calling the work ready.
-4. [`forms-core-pr-review-iteration`](../../.agents/skills/forms-core-pr-review-iteration/SKILL.md)
+3. [`forms-core-pr-review-iteration`](../../.agents/skills/forms-core-pr-review-iteration/SKILL.md)
    when GitHub review threads drive the work.
-5. [`forms-core-pr-publish`](../../.agents/skills/forms-core-pr-publish/SKILL.md)
+4. [`forms-core-pr-publish`](../../.agents/skills/forms-core-pr-publish/SKILL.md)
    only when the user asks to publish work.
-
-## Temporary Artifacts
-
-[docs/steps.md](../steps.md) is intentionally temporary. It coordinates the
-multi-PR build. The final release-readiness PR should remove it or replace it
-with durable history after the implementation is reflected in stable docs,
-tests, and README examples.
diff --git a/docs/pr-plan.md b/docs/pr-plan.md
index b81b3db..ba362e9 100644
--- a/docs/pr-plan.md
+++ b/docs/pr-plan.md
@@ -1,7 +1,8 @@
 # forms-core PR Plan
 
-The repository should be built in small PRs. Each PR must leave the branch in a
-reviewable state and update [docs/steps.md](./steps.md).
+The repository was built in small PRs. Future maintenance PRs should keep the
+branch reviewable and update durable source-of-truth docs when behavior,
+release workflow, or review policy changes.
 
 ## PR 1 - Docs And Agent Contract
 
diff --git a/docs/release-train.md b/docs/release-train.md
index 5b3d70b..4fdcb2d 100644
--- a/docs/release-train.md
+++ b/docs/release-train.md
@@ -37,7 +37,8 @@ After `1.0.0`, use normal SemVer:
 - [ ] `npm pack --dry-run` shows only expected files.
 - [ ] README examples compile or are covered by tests.
 - [ ] `docs/limitations.md` is current.
-- [ ] `docs/steps.md` has been removed or replaced with durable history.
+- [ ] Temporary implementation trackers have been removed or replaced with
+      durable docs.
 - [ ] package exports are reviewed.
 - [ ] no React/UI dependency is present.
 - [ ] `@tanstack/form-core` and `mobx` dependency ranges are intentional.
diff --git a/docs/steps.md b/docs/steps.md
deleted file mode 100644
index 3f01f44..0000000
--- a/docs/steps.md
+++ /dev/null
@@ -1,168 +0,0 @@
-# forms-core Implementation Steps
-
-This is the temporary implementation tracker. Each agent must update it in the
-same PR that completes or changes a step.
-
-Final cleanup rule: after the library is implemented, tested, documented, and
-ready for release, remove this file or replace it with a short implementation
-history. Durable facts must live in `README.md`, `docs/architecture.md`,
-`docs/review/forms-core-checklist.md`, tests, and source comments where needed.
-
-## Status Legend
-
-- `[ ]` not started
-- `[~]` in progress
-- `[x]` complete and validated
-
-## PR 1 - Agent Contract And Architecture Docs
-
-- [x] Create `AGENTS.md`.
-- [x] Create `CLAUDE.md -> AGENTS.md` symlink.
-- [x] Create `.agents` skills and rules.
-- [x] Create `.claude/skills -> ../.agents/skills` symlink.
-- [x] Create `REVIEW.md`.
-- [x] Create architecture, review, handoff, PR plan, release train, and
-      bootstrap-pattern docs.
-- [x] Create README guidelines and quality-gate docs.
-- [x] Add repo-local `scripts/lint-skills.mjs`.
-- [x] Validate docs-only change with `git diff --check`.
-
-Exit criteria:
-
-- no package implementation;
-- no dependencies added;
-- future agents can start from `AGENTS.md` and `docs/handoff/README.md`.
-
-## PR 2 - Package Scaffold
-
-- [x] Add `package.json` for `@revisium/forms-core`.
-- [x] Add TypeScript config.
-- [x] Add build config.
-- [x] Add test runner config.
-- [x] Add lint and format config.
-- [x] Add package entrypoint with placeholder exports only if needed.
-- [x] Add `npm run verify` that runs typecheck, lint, test, build, and docs or
-      skill validation.
-- [x] Wire existing local skill lint into `npm run skills:lint`.
-- [x] Add Markdown lint and Prettier check for docs.
-- [x] Add coverage output suitable for Sonar.
-- [x] Add initial CI workflow once `npm run verify` exists.
-- [x] Add Sonar scan wiring and project configuration.
-- [x] Add local Sonar scripts and bootstrap docs.
-- [x] Add zero-tolerance Sonar issue inspection.
-- [x] Add package publish metadata without publishing.
-
-Allowed dependencies:
-
-- runtime: `@tanstack/form-core`, `mobx`;
-- test/dev dependencies only when needed for local scripts.
-
-Exit criteria:
-
-- `npm run verify` passes locally and in CI;
-- package can build without implementation shortcuts;
-- no React dependencies.
-
-## PR 3 - Private MobX Selector Bridge
-
-- [x] Implement internal bridge over `{ get, subscribe }`.
-- [x] Use `observable.box(..., { deep: false })`.
-- [x] Update selected value inside `runInAction`.
-- [x] Support custom equality comparator.
-- [x] Support unsubscribe object and unsubscribe function shapes.
-- [x] Expose `value` and `dispose()` internally.
-- [x] Keep bridge out of public exports.
-- [x] Add unit tests for reaction updates and disposal unsubscribe.
-
-Exit criteria:
-
-- MobX `reaction` fires when selected TanStack-like state changes;
-- no consumer-facing subscription API.
-
-## PR 4 - Form And Control Wrappers
-
-- [x] Implement `createForm`.
-- [x] Implement `field`.
-- [x] Own `FormApi` and mount/dispose lifecycle.
-- [x] Expose form getters: `isValid`, `isDirty`, `isTouched`, `isSubmitting`,
-      `errors`.
-- [x] Expose form commands: `getRawValue`, `reset`, `submit`, `validate`,
-      `dispose`.
-- [x] Expose control getters: `value`, `displayValue`, `error`, `visibleError`,
-      `isDirty`, `isTouched`, `isValidating`.
-- [x] Expose control commands: `setValue`, `blur`, `reset`.
-- [x] Normalize TanStack error maps.
-- [x] Add tests for scalar value reactivity, validity reactivity, reset, dirty,
-      touched, and no manual subscribe usage.
-
-Exit criteria:
-
-- target scalar public API works;
-- React is not imported.
-
-## PR 5 - Validation And Server Errors
-
-- [x] Support sync field validators.
-- [x] Support async field validators.
-- [x] Support async debounce.
-- [x] Support linked/dependent field validation where TanStack supports it.
-- [x] Support form-level validation.
-- [x] Support submit validation.
-- [x] Implement `applyServerErrors`.
-- [x] Clear server errors on relevant value changes and reset.
-- [x] Add tests for validation, debounce, linked validation, form validation,
-      submit validation, server error visibility, and server error clearing.
-
-Exit criteria:
-
-- server-error lifecycle is explicit and tested;
-- no parallel validation engine.
-
-## PR 6 - Nested Paths And Arrays
-
-- [x] Add nested object path helpers.
-- [x] Support nested control paths.
-- [x] Implement `arrayField`.
-- [x] Implement array item model with `{ id, index, controls, value }`.
-- [x] Implement `push`, `insert`, `removeById`, `removeAt`, `move`, `swap`,
-      `clear`.
-- [x] Preserve stable public ids through index changes.
-- [x] Add tests for nested object path and stable array item ids.
-
-Exit criteria:
-
-- public item identity never uses array index;
-- nested paths work in values, errors, and patches where applicable.
-
-## PR 7 - Patches, Disposal, And Hardening
-
-- [x] Implement `onPatch`.
-- [x] Diff scalar, nested object, and array changes.
-- [x] Emit useful patches for autosave.
-- [x] Dispose patch listeners.
-- [x] Harden disposed-object behavior.
-- [x] Add tests for scalar patches, nested patches, array patches, listener
-      disposal, bridge disposal, and form disposal.
-
-Exit criteria:
-
-- autosave listener can consume emitted patches without reading raw TanStack
-  state.
-
-## PR 8 - README, API Polish, And Release Readiness
-
-- [ ] Replace placeholder README with real usage examples.
-- [ ] Bring README to the structure in `docs/readme-guidelines.md`.
-- [ ] Document known limitations.
-- [ ] Document why `@tanstack/react-form` is intentionally not used.
-- [ ] Confirm public exports.
-- [ ] Run full verify.
-- [ ] Run `npm pack` and inspect package contents.
-- [ ] Add release train and npm publish workflows using `revisium-actions`.
-- [ ] Inspect CI and Sonar/quality gate status when configured.
-- [ ] Remove or replace this temporary `docs/steps.md`.
-
-Exit criteria:
-
-- package is ready for an npm publish PR or release workflow;
-- no temporary implementation-only artifacts remain.
diff --git a/package-lock.json b/package-lock.json
index 8b2d583..92feb0f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
         "typescript-eslint": "^8.15.0"
       },
       "engines": {
-        "node": ">=20.16.0"
+        "node": ">=24.11.1"
       },
       "peerDependencies": {
         "mobx": "^6.0.0"
diff --git a/package.json b/package.json
index f7e11fd..35b4c8e 100644
--- a/package.json
+++ b/package.json
@@ -79,7 +79,7 @@
     "typescript-eslint": "^8.15.0"
   },
   "engines": {
-    "node": ">=20.16.0"
+    "node": ">=24.11.1"
   },
   "publishConfig": {
     "access": "public"