What is update-localization?

A guide for changing the languages, regional formats, user language preferences, and time-zone behavior supported by an application. Localization means adapting software for different languages and regions.

Use it when changing supported languages or locales, translation catalogs, locale selection, user preferences, or time-zone lists and rules.

It helps keep translated text, regional formatting, stored preferences, request handling, defaults, and fallbacks consistent.

update-localization — Skill for Claude Code and Codex by tarlepp

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add tarlepp/symfony-flex-backend --skill update-localization

Clone the repo

git clone --depth 1 https://github.com/tarlepp/symfony-flex-backend

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/tarlepp/symfony-flex-backend/update-localization/github.svg)](https://agentmods.dev/skills/tarlepp/symfony-flex-backend/update-localization)

Your own site

<a href="https://agentmods.dev/skills/tarlepp/symfony-flex-backend/update-localization"><img src="https://agentmods.dev/badge/skills/tarlepp/symfony-flex-backend/update-localization/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/tarlepp/symfony-flex-backend/update-localization"><img src="https://agentmods.dev/badge/skills/tarlepp/symfony-flex-backend/update-localization.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,080 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00034	$0.02080
Opus 5.5	$0.00014	$0.00832
Sonnet 5.5	$0.00007	$0.00416
Haiku 4.5	$0.00003	$0.00208

Measured 4d ago against content hash 536ed4c59ec2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

update-localization scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.github/skills/update-localization/SKILL.md · 178 lines

How it starts

The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.

What is this?

Use this skill when changing supported languages/locales, request locale selection, translation resources, user localization preferences, or timezone lists and validation. Translation language, formatting locale, user timezone, and storage timezone are separate contracts; changing one does not implicitly change the others.

Follow the shared skill guidance, including repository instructions and AI rules. Use update-application-configuration for settings and wiring, and add-api-dto-mapping when preference inputs or request mappings change.

Table of Contents ᐞ

What is this
- Table of Contents

Localization path map ᐞ

Inspect the affected source, configuration, and consumers:

src/Enum/Language.php and Locale.php: supported values and enum defaults.
src/Service/Localization.php: supported lists, request-locale fallback, default user timezone, timezone formatting, caching, and failure logging.
src/EventSubscriber/AcceptLanguageSubscriber.php: early request locale selection using the configured %locale%.
config/services.yaml, config/packages/framework.yaml, and translation.yaml: default locale, translator resource path and fallback.
translations/, currently including security+intl-icu.fi.xlf, and src/Security/Handler/TranslatedAuthenticationFailureHandler.php: actual message keys, domains, formats, and authentication translation.
src/Controller/v1/Localization/ and its integration/E2E tests: language, locale, and timezone list contracts and OpenAPI metadata.
src/Entity/User.php, src/DTO/User/User.php, src/AutoMapper/User/RequestMapper.php, src/Security/SecurityUser.php, and src/EventSubscriber/JWTCreatedSubscriber.php: preference defaults, input conversion, persisted values, security-user snapshots, and JWT claims.
Language, locale, and timezone constraints under src/Validator/Constraints/, and enum types under src/Doctrine/DBAL/Types/: accepted inputs and database representation. Shared log entities use UTC independently of user timezone.

Read the full file on GitHub · 178 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

4d ago First seen · 178 lines · 34 tokens per session scan A 536ed4c59ec2

Subscribe to this mod's changes

update-localization is a skill published in the GitHub repository tarlepp/symfony-flex-backend (288 stars, last pushed yesterday), licensed MIT. It adds 34 tokens to every session and 2,080 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-02.

Localization api flex rest rest-api symfony symfony-flex

update-localization next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
update-localizationtarlepp/symfony-flex-backend	Skill	288	yesterday	MIT	A	34	Claude Code, Codex
api-integration-architectsickn33/agentic-awesome-skills	Skill	49k	yesterday	MIT	A	33	Claude Code
dmrwemake-services/django-modern-rest	Skill	1.5k	today	MIT	A	80	Claude Code, Codex
horse-database-poolingHashLoad/horse	Skill	1.4k	8d ago	MIT	A	30	Claude Code, Codex
horse-dependency-injectionHashLoad/horse	Skill	1.4k	8d ago	MIT	A	27	Claude Code, Codex
horse-mvc-architectureHashLoad/horse	Skill	1.4k	8d ago	MIT	A	34	Claude Code, Codex
horse-request-responseHashLoad/horse	Skill	1.4k	8d ago	MIT	A	32	Claude Code, Codex