feat: bundle enum consumer skill

.changelog/bundled-consumer-skill.md

@@ -0,0 +1,6 @@
+---
+category: added
+type: minor
+---
+
+Bundle the fast-forward-enum consumer skill with executable examples, optional installation guidance and Composer discovery metadata.

AGENTS.md

@@ -161,3 +161,11 @@ When changing public API:
 - update tests and README in the same pass
 
 When opening repo-maintenance issues against `dev-tools`, prefer separate issues per bug instead of mixing unrelated failures into one report.
+
+## Bundled consumer skill
+
+Read [the consumer skill](resources/skills/fast-forward-enum/SKILL.md) when changing application integration
+examples, consumer guides or the skill. Keep its version contract, references
+and executable examples aligned with the supported public API. The canonical
+distributable source is `resources/skills`; it needs no installed copy or host
+alias. Repository maintenance continues to follow this AGENTS.md.

README.md

@@ -316,3 +316,12 @@ Issues, pull requests, and documentation improvements are welcome.
 - [Tests workflow](https://github.com/php-fast-forward/enum/actions/workflows/tests.yml)
 - [MIT License](LICENSE)
 - [RFC 2119](https://datatracker.ietf.org/doc/html/rfc2119)
+
+## Consumer agent skill
+
+The package includes [fast-forward-enum](resources/skills/fast-forward-enum/SKILL.md) for application integration.
+It supports `fast-forward/enum:^0.2`; inspect the installed version.
+See [skill installation and lifecycle](resources/skills/fast-forward-enum/references/installation.md) for
+optional project synchronization with `llm/skills ^1.15`, guarded manual
+project/global copies and a pinned Skills CLI alternative. Shipping files does
+not install tooling or activate the skill in an agent session.

composer.json

@@ -43,6 +43,9 @@
     "require-dev": {
         "fast-forward/dev-tools": "dev-main"
     },
+    "suggest": {
+        "llm/skills": "Optionally synchronize the bundled consumer skill in your project."
+    },
     "minimum-stability": "stable",
     "autoload": {
         "psr-4": {
@@ -73,6 +76,9 @@
         },
         "grumphp": {
             "config-default-path": "vendor/fast-forward/dev-tools/grumphp.yml"
+        },
+        "skills": {
+            "source": "resources/skills"
         }
     },
     "scripts": {

resources/skills/fast-forward-enum/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Felipe Sayão Lobato Abreu <github@mentordosnerds.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

resources/skills/fast-forward-enum/SKILL.md

@@ -0,0 +1,77 @@
+---
+name: fast-forward-enum
+description: Integrate Fast Forward enum traits, catalogs, name/value lookups and transitions with explicit handling of invalid external values.
+license: MIT; see LICENSE
+compatibility: Supports fast-forward/enum ^0.2 and PHP ^8.3. Requires Composer and declared extensions; inspect the installed version. Earlier releases are outside this contract. Requires ext-mbstring.
+metadata:
+  author: Fast Forward
+  api-baseline: fast-forward/enum ^0.2
+---
+
+# Use enum helpers and catalogs
+
+Use this skill for an application consuming `fast-forward/enum:^0.2`.
+Read its instructions, manifest/lockfile and installed source before editing.
+Run `composer show fast-forward/enum`. For versions outside this contract,
+inspect matching documentation; do not silently upgrade the application.
+
+## First working integration
+
+Requires PHP ^8.3, Composer's application autoloader and this package's runtime
+dependencies. Enable ext-mbstring.
+With authority to install the dependency:
+
+```sh
+composer require 'fast-forward/enum:^0.2'
+```
+
+Create `app.php` in the application root alongside composer.json/vendor:
+
+```php
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/vendor/autoload.php';
+
+use FastForward\Enum\Calendar\Weekday;
+use FastForward\Enum\Helper\EnumHelper;
+
+$values = EnumHelper::values(Weekday::class);
+if ($values !== [1, 2, 3, 4, 5, 6, 7]
+    || EnumHelper::fromName(Weekday::class, 'Monday') !== Weekday::Monday
+    || EnumHelper::tryFromName(Weekday::class, 'not-a-day') !== null
+    || Weekday::tryFrom(0) !== null) {
+    throw new RuntimeException('Enum lookup contract differs.');
+}
+
+echo "integration ready\n";
+```
+
+Run `php app.php`. It throws on a wrong result; success prints
+`integration ready`. It uses no production data and starts no server.
+
+## Wiring and failure boundaries
+
+Requires PHP 8.3 and ext-mbstring; no container or configuration file is needed. Composer package `fast-forward/enum` exposes `FastForward\Enum`. Use a catalog only when its values match the application's domain; otherwise define your own enum in a same-named file.
+
+For a custom string/int backed enum use the HasValues, HasNames, HasNameLookup, HasNameMap, HasValueMap and HasOptions traits from `FastForward\Enum\Trait` as needed. HasOptions maps case names to backing values; it is not an automatically translated UI label map. HasLabel's default label contains the enum class and case name; override label() and implement LabeledEnumInterface for deliberate presentation text. EnumHelper::labels requires that interface. Unit enums have names/cases but no backed values; passing a non-enum or a unit enum to values() raises ValueError.
+
+External strings are case-sensitive for name lookup. Use tryFromName or backed tryFrom for untrusted values, and explicitly distinguish null from a valid zero/empty backing value. The throwing alternatives signal ValueError.
+
+For enum state workflows, implement HasTransitions::transitionMap() with case-name keys and target-case lists in the application's enum file; canTransitionTo checks membership and assertCanTransitionTo raises InvalidTransitionException. It validates a transition, but does not persist or mutate an entity. This skill supports ^0.2; the ^0.1 line is outside this skill's version contract.
+
+## Verify integration
+
+Run the [complete example](examples/integration.php) against the application's
+autoloader in a disposable process. It checks success and negative cases:
+
+```sh
+php /path/to/fast-forward-enum/examples/integration.php ./vendor/autoload.php
+```
+
+Expected final marker: `fast-forward-enum: ok`. Keep application-specific regression
+tests in its existing PHPUnit suite, with each fixture class in its same-named
+file. File copying, host discovery and completed agent tasks are different checks.
+For optional copying/synchronization load
+[installation and lifecycle](references/installation.md).

resources/skills/fast-forward-enum/examples/integration.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+require $argv[1] ?? dirname(__DIR__, 4) . '/vendor/autoload.php';
+
+use FastForward\Enum\Calendar\Weekday;
+use FastForward\Enum\Helper\EnumHelper;
+
+$values = EnumHelper::values(Weekday::class);
+if ($values !== [1, 2, 3, 4, 5, 6, 7]
+    || EnumHelper::fromName(Weekday::class, 'Monday') !== Weekday::Monday
+    || EnumHelper::tryFromName(Weekday::class, 'not-a-day') !== null
+    || Weekday::tryFrom(0) !== null) {
+    throw new RuntimeException('Enum lookup contract differs.');
+}
+try {
+    EnumHelper::fromName(Weekday::class, 'not-a-day');
+    throw new RuntimeException('An invalid enum name unexpectedly resolved.');
+} catch (ValueError) {
+}
+
+echo "fast-forward-enum: ok\n";

resources/skills/fast-forward-enum/references/installation.md

@@ -0,0 +1,167 @@
+# Optional installation of fast-forward-enum
+
+`fast-forward/enum:^0.2` includes this complete package under
+`resources/skills/fast-forward-enum`. Run `composer show fast-forward/enum`
+and inspect that path before copying. Earlier releases are outside this skill
+contract. Composer suggestions do not install anything automatically. Library
+installation, discovery-root copies and session activation are separate steps.
+
+## Team project with llm/skills
+
+Use Composer 2 and optionally add `llm/skills:^1.15` as development tooling.
+Start with a project target for reviewable team configuration. Preserve existing
+settings/aliases/approvals when merging these keys into `skills.json` **before**
+installing or enabling the plugin:
+
+```json
+{
+  "target": ".agents/skills",
+  "aliases": [],
+  "discovery": false,
+  "auto-sync": true,
+  "vendor-sources": false,
+  "dependencies": {
+    "composer": {
+      "trusted": ["fast-forward/enum"],
+      "trusted-replace": true
+    }
+  }
+}
+```
+
+This replaces implicit dependency trust with a narrow donor allowlist, disables
+remote vendor sources and requests no host aliases. A deliberate
+`fast-forward/*` allowlist grants broader organizational trust. Use the actual
+host's project discovery root; Claude Code can choose `.claude/skills`.
+Do not erase intentional aliases or other donors in an existing manifest.
+
+If the application owner has authorized this plugin's execution, merge its
+root approval, install it and inspect the report:
+
+```sh
+composer config allow-plugins.llm/skills true
+composer require --dev 'llm/skills:^1.15'
+composer skills:show
+```
+
+The donor only suggests the tool; it neither requires it at runtime nor grants
+this approval on behalf of consumers. Commit the chosen manifest, skills.json,
+application lockfile and intended project copies according to project policy.
+Approved Composer install/update operations then perform automatic sync.
+
+For manual timing, choose `auto-sync:false` before installation and use:
+
+```sh
+composer skills:show
+composer skills:update fast-forward/enum --dry-run
+composer skills:update fast-forward/enum
+```
+
+Explicitly naming a donor selects/trusts it for that run. Test automatic trust
+without a package argument when that policy is what matters. With Composer
+2.10.3 and llm/skills 1.15.0, `--no-scripts` alone still permits automatic copy;
+`auto-sync:false` disables automatic sync and `--no-plugins` stops plugin loading.
+Verify these behaviors again after changing tool versions.
+
+## Update and removal boundaries
+
+A 1.15 sync overwrites incoming same-path files. It retains extra local files
+and files removed from the donor's next version. Removing a donor or uninstalling
+the plugin does not delete its existing instruction copies. Regard the copy as
+donor-owned; keep deliberate local instructions in a separate skill name.
+Record the installed donor/tool versions and review diffs before each refresh.
+
+Inspect cleanup without applying it:
+
+```sh
+composer skills:update --clean --dry-run
+```
+
+An unscoped clean can remove all target skills, including handwritten ones.
+Scoped clean reinstalls the current selection; it cannot locate an absent donor
+by historical ownership. Inventory affected directories, back up outside
+discovery, and obtain authority before any destructive cleanup. Do not add a
+root-wide clean hook.
+
+## Guarded manual copying
+
+Choose the existing project root, then copy all files together:
+
+```sh
+skill_source="vendor/fast-forward/enum/resources/skills/fast-forward-enum"
+skill_target=".agents/skills/fast-forward-enum"
+test -f "$skill_source/SKILL.md" &&
+test ! -e "$skill_target" &&
+test ! -L "$skill_target" &&
+mkdir -p "$(dirname "$skill_target")" &&
+cp -R "$skill_source" "$skill_target"
+```
+
+Both existing directories and dangling links are refused. Global use is an
+explicit alternative: set skill_target to
+`$HOME/.agents/skills/fast-forward-enum` for Codex or the configured
+`$HOME/.claude/skills/fast-forward-enum` for Claude Code.
+Do not create a symlink into replaceable vendor content. A globally installed
+Composer plugin does not constitute a global instruction copy.
+
+For a selected manual update/removal, first move only that package into a unique
+backup outside discovery:
+
+```sh
+skill_backup="$HOME/.agent-skill-backups/fast-forward-enum-$(date +%Y%m%d%H%M%S)-$$"
+test -d "$skill_target" &&
+test ! -L "$skill_target" &&
+test ! -e "$skill_backup" &&
+test ! -L "$skill_backup" &&
+mkdir -p "$(dirname "$skill_backup")" &&
+mv "$skill_target" "$skill_backup"
+```
+
+For an update review the new source, then repeat the guarded copy. To roll back,
+archive any replacement and restore the saved whole directory to the same
+target. A manager-owned copy may return on its next sync until the consumer
+changes that donor's trust/dependency configuration. Keep backups out of every
+discovery directory.
+
+## Optional Skills CLI
+
+Requires npm, Node.js 22.20.0+ and Git for repository sources. The reviewed pin
+is skills@1.7.2; evaluate version changes separately. Choose only the actual host:
+
+```sh
+npx --yes skills@1.7.2 add ./vendor/fast-forward/enum/resources/skills/fast-forward-enum --skill fast-forward-enum --agent codex --copy --yes
+npx --yes skills@1.7.2 list --agent codex
+```
+
+Use `--agent claude-code` for that host. Add `--global` to both commands only
+when global scope was selected. Preserve/commit intended project copies and the
+CLI's project lockfile. For a remote source first set SKILL_REF to a reviewed
+immutable commit:
+
+```sh
+npx --yes skills@1.7.2 add "https://github.com/php-fast-forward/enum/tree/$SKILL_REF/resources/skills/fast-forward-enum" --skill fast-forward-enum --agent codex --copy --yes
+```
+
+Review the new revision and back up local edits before repeating for an update.
+Remove the chosen package/scope with:
+
+```sh
+npx --yes skills@1.7.2 remove fast-forward-enum --agent codex --yes
+# Only for a selected global copy:
+npx --yes skills@1.7.2 remove fast-forward-enum --agent codex --global --yes
+```
+
+After every route inspect the complete files, refresh the agent session,
+confirm the public name is discovered and perform a bounded consumer task.
+A copy, listing and successful task are separate observations.
+
+Tool contracts: [llm/skills 1.15.0](https://github.com/roxblnfk/skills/tree/1.15.0),
+[Composer plugin approval](https://getcomposer.org/doc/06-config.md#allow-plugins)
+and [Skills CLI](https://github.com/vercel-labs/skills).
+
+The Skills CLI 1.7.2 removal report is not proof that the canonical project
+`.agents/skills` directory disappeared. A Codex project exercise reported one
+removal while that copied package remained. Inspect the actual target and CLI
+lockfiles afterwards. If an obsolete copy remains, verify that no other host
+uses it, then archive only that selected directory outside discovery using the
+manual recovery procedure above. Do not run a blanket clean to compensate.

tests/ConsumerSkillTest.php

@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Ergonomic utilities for PHP enums, including names, values, lookups, and option maps.
+ *
+ * This file is part of fast-forward/enum project.
+ *
+ * @author   Felipe Sayão Lobato Abreu <github@mentordosnerds.com>
+ * @license  https://opensource.org/licenses/MIT MIT License
+ *
+ * @see      https://github.com/php-fast-forward/enum
+ * @see      https://github.com/php-fast-forward/enum/issues
+ * @see      https://php-fast-forward.github.io/enum/
+ * @see      https://datatracker.ietf.org/doc/html/rfc2119
+ */
+
+namespace FastForward\Enum\Tests;
+
+use PHPUnit\Framework\Attributes\CoversNothing;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Process\Process;
+
+#[CoversNothing]
+final class ConsumerSkillTest extends TestCase
+{
+    /**
+     * @return void
+     */
+    public function testBundledConsumerIntegration(): void
+    {
+        $root = \dirname(__DIR__);
+        $process = new Process([
+            \PHP_BINARY,
+            $root . '/resources/skills/fast-forward-enum/examples/integration.php',
+            $root . '/vendor/autoload.php',
+        ], $root, [
+            'XDEBUG_MODE' => 'off',
+        ]);
+        $process->setTimeout(20);
+        $process->run();
+
+        self::assertTrue($process->isSuccessful(), $process->getErrorOutput() . $process->getOutput());
+        self::assertStringContainsString('fast-forward-enum: ok', $process->getOutput());
+    }
+}