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symfony/symfony
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Build Symfony forms with custom Form Types, validation constraints, HTTP 422 handling, and multi-step flows
MITAuto-check: notes
Install Form Types Validation
$ npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dev-toolings/superpowers-symfony form-types-validation --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/dev-toolings/superpowers-symfony.git skills-src && mkdir -p .claude/skills && cp -r skills-src/content/skills/form-types-validation .claude/skills/form-types-validation && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "form-types-validation" agent skill from https://github.com/dev-toolings/superpowers-symfony/tree/main/content/skills/form-types-validation into .claude/skills/form-types-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-types-validation", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/dev-toolings/superpowers-symfony/tree/main/content/skills/form-types-validationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dev-toolings/superpowers-symfony form-types-validation --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dev-toolings/superpowers-symfony.git skills-src && mkdir -p .agents/skills && cp -r skills-src/content/skills/form-types-validation .agents/skills/form-types-validation && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "form-types-validation" agent skill from https://github.com/dev-toolings/superpowers-symfony/tree/main/content/skills/form-types-validation into .agents/skills/form-types-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-types-validation", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dev-toolings/superpowers-symfony form-types-validation --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dev-toolings/superpowers-symfony.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/content/skills/form-types-validation .cursor/skills/form-types-validation && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "form-types-validation" agent skill from https://github.com/dev-toolings/superpowers-symfony/tree/main/content/skills/form-types-validation into .cursor/skills/form-types-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-types-validation", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/dev-toolings/superpowers-symfony.git --path content/skills/form-types-validation--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dev-toolings/superpowers-symfony form-types-validation --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dev-toolings/superpowers-symfony.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/content/skills/form-types-validation .gemini/skills/form-types-validation && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "form-types-validation" agent skill from https://github.com/dev-toolings/superpowers-symfony/tree/main/content/skills/form-types-validation into .gemini/skills/form-types-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-types-validation", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install dev-toolings/superpowers-symfony form-types-validationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/dev-toolings/superpowers-symfony.git skills-src && mkdir -p .github/skills && cp -r skills-src/content/skills/form-types-validation .github/skills/form-types-validation && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "form-types-validation" agent skill from https://github.com/dev-toolings/superpowers-symfony/tree/main/content/skills/form-types-validation into .github/skills/form-types-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-types-validation", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install dev-toolings/superpowers-symfony form-types-validation --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dev-toolings/superpowers-symfony.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/content/skills/form-types-validation .opencode/skills/form-types-validation && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "form-types-validation" agent skill from https://github.com/dev-toolings/superpowers-symfony/tree/main/content/skills/form-types-validation into .opencode/skills/form-types-validation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-types-validation", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
form-types-validation- GitHub stars
- 222
- Token cost
- ~497 tokens
- SKILL.md length
- 235 words
- Files
- 2
- Skills in repo
- 44
- Repo updated
- First seen
- Licence
- MIT
At a glance
Build Symfony forms with custom Form Types, validation constraints, HTTP 422 handling, and multi-step flows
- Works in 5 steps: Put business constraints on the entity… → Build the form type with explicit field… → Split rules into validation groups when… → …
- SKILL.md covers Use when, Default workflow, Guardrails and Progressive disclosure, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Form Types Validation is an agent skill from dev-toolings/superpowers-symfony. Build Symfony forms with custom Form Types, validation constraints, HTTP 422 handling, and multi-step flows
Its SKILL.md is about 500 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `reference.md`).
It works with Symfony. The repository describes itself as: Claude Code plugin for Symfony 7.4 LTS & 8.x — 44 skills, 7 AI subagents & 13 commands for API Platform v4, Doctrine ORM 3, TDD (Pest/PHPUnit), Messenger, security & DDD. The licence is MIT.
Example prompts
- “/form-types-validation”
Requirements
- Pre-approved tools (allowed-tools): Read, Glob, Grep, Write, Edit, Bash
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Put business constraints on the entity or DTO; keep form-level constraints for UI-only rules such as uploads.
- Build the form type with explicit field types and options.
- Split rules into validation groups when contexts differ.
- Add data transformers or PRE_SET_DATA/PRE_SUBMIT listeners only where the model and the view disagree.
- In the controller, check isSubmitted() && isValid() and pass the form itself to render().
What it can do on your machine
Read from SKILL.md and the folder at commit 459bcd0. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadGlobGrepWriteEditBash
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Form Types Validation loads about 497 tokens when it runs. Until then it costs about 32 tokens; SKILL.md has 235 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Read, Glob, Grep, Write, Edit, Bash
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from dev-toolings/superpowers-symfony at commit 459bcd0, republished under its MIT licence (© dev-toolings). 235 words, ~497 tokens.
Download SKILL.mdSave it as
.claude/skills/form-types-validation/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- form-types-validation
- description
- Build Symfony forms with custom Form Types, validation constraints, HTTP 422 handling, and multi-step flows
- allowed-tools
- Read, Glob, Grep, Write, Edit, Bash
- capabilities
- read, search, edit, shell
- tags
- security
Form Types Validation (Symfony)
Use when
- Building or changing a Symfony form type.
- Adding validation constraints on an entity, a DTO, or a form field.
- Different rules per context (registration vs profile) through validation groups.
- Converting values with a data transformer or reacting with form events.
- Writing a custom constraint, or a form spread across several steps.
Default workflow
- Put business constraints on the entity or DTO; keep form-level constraints for UI-only rules such as uploads.
- Build the form type with explicit field types and options.
- Split rules into validation groups when contexts differ.
- Add data transformers or
PRE_SET_DATA/PRE_SUBMITlisteners only where the model and the view disagree. - In the controller, check
isSubmitted() && isValid()and pass the form itself torender().
Guardrails
- Pass the form, not
createView(), torender()so an invalid submit answers 422. - A transformer that cannot convert throws
TransformationFailedException, it never returns garbage. - Do not duplicate the same constraint on the form and on the entity.
- Multi-step flows and the custom violation mapper are recent: verify the installed Symfony version first.
Progressive disclosure
- Use this file for execution posture and risk controls.
- Open references when deep implementation details are needed.
Output contract
- Form types and the constraints they rely on, with their groups.
- Transformers, listeners or custom constraints, each with a reason.
- Tests for a valid submit, an invalid submit (422), and each custom constraint.
References
reference.md
© dev-toolings, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in content/skills/form-types-validation of dev-toolings/superpowers-symfony.
- SKILL.md
- reference.md
Open the folder on GitHubat commit 459bcd0
Compare with similar skills
Form Types Validation next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Form Types Validation this skilldev-toolings/superpowers-symfony | 222 | — | ~497 | Automated safety check: Notes | MIT | |
| Sync Translationssymfony/symfony | 31k | — | ~1.9k | Automated safety check: Pass | MIT | |
| Bug Triagesymfony/symfony | 31k | — | ~1.9k | Automated safety check: Pass | MIT | |
| Merge Upsymfony/symfony | 31k | — | ~4k | Automated safety check: Pass | MIT | |
| PR Mergesymfony/symfony | 31k | — | ~3.1k | Automated safety check: Pass | MIT | |
| Security Triagesymfony/symfony | 31k | — | ~2.6k | Automated safety check: Pass | MIT |
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PR Merge
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Merge a reviewed pull request the way the Symfony core team does: one --no-ff merge commit per PR, whose message archives the whole discussion, with the review gates checked first.
Security Triage
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Related
Works with
Questions about Form Types Validation
What does Form Types Validation do?
Build Symfony forms with custom Form Types, validation constraints, HTTP 422 handling, and multi-step flows. Form Types Validation is an agent skill from dev-toolings/superpowers-symfony.
How do I install Form Types Validation in Claude Code?
Run `npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a claude-code`. Or copy the skill folder (content/skills/form-types-validation in dev-toolings/superpowers-symfony) into .claude/skills/form-types-validation in your project. Claude Code loads it when a task matches its description.
How do I install Form Types Validation in Codex?
Run `npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a codex`. Or copy the skill folder (content/skills/form-types-validation in dev-toolings/superpowers-symfony) into .agents/skills/form-types-validation in your project. Codex loads it when a task matches its description.
Can I use Form Types Validation in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add dev-toolings/superpowers-symfony --skill form-types-validation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/form-types-validation, .gemini/skills/form-types-validation, .github/skills/form-types-validation and .opencode/skills/form-types-validation in your project.
What does Form Types Validation need to run?
SKILL.md names no scripts, command-line tools or credentials: Form Types Validation is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Glob, Grep, Write, Edit, Bash.
Does Form Types Validation access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Form Types Validation safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Form Types Validation use?
Form Types Validation is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Form Types Validation use?
About 497 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Form Types Validation?
Skills that share tags, products or a category with Form Types Validation: Sync Translations (symfony/symfony, 31k stars), Bug Triage (symfony/symfony, 31k stars), Merge Up (symfony/symfony, 31k stars) and PR Merge (symfony/symfony, 31k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Form Types Validation?
dev-toolings (a GitHub organization) maintains it in dev-toolings/superpowers-symfony, which has 222 GitHub stars. The repository holds 44 skills in this directory. The repository was last updated on October 5, 2026.
Source: dev-toolings/superpowers-symfony on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.