Flutter App
ccplugins/awesome-claude-code-plugins
Bootstrap a new Flutter mobile app with clean architecture, Riverpod, FVM-pinned SDK, current packages, and no deprecated APIs.
Secure Flutter token/PII storage, build-time secrets, network trust, and release hardening using OWASP Mobile practices.
Install Flutter Security
$ npx skills add HoangNguyen0403/agent-skills-standard --skill flutter-security -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard flutter-security --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/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/flutter/flutter-security .claude/skills/flutter-security && 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 "flutter-security" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/flutter/flutter-security into .claude/skills/flutter-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flutter-security", 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/HoangNguyen0403/agent-skills-standard/tree/develop/skills/flutter/flutter-securityType 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 HoangNguyen0403/agent-skills-standard --skill flutter-security -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard flutter-security --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/flutter/flutter-security .agents/skills/flutter-security && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "flutter-security" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/flutter/flutter-security into .agents/skills/flutter-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flutter-security", 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 HoangNguyen0403/agent-skills-standard --skill flutter-security -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard flutter-security --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/flutter/flutter-security .cursor/skills/flutter-security && 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 "flutter-security" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/flutter/flutter-security into .cursor/skills/flutter-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flutter-security", 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/HoangNguyen0403/agent-skills-standard.git --path skills/flutter/flutter-security--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 HoangNguyen0403/agent-skills-standard --skill flutter-security -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard flutter-security --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/flutter/flutter-security .gemini/skills/flutter-security && 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 "flutter-security" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/flutter/flutter-security into .gemini/skills/flutter-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flutter-security", 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 HoangNguyen0403/agent-skills-standard flutter-securityInstalls 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 HoangNguyen0403/agent-skills-standard --skill flutter-security -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/flutter/flutter-security .github/skills/flutter-security && 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 "flutter-security" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/flutter/flutter-security into .github/skills/flutter-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flutter-security", 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 HoangNguyen0403/agent-skills-standard --skill flutter-security -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard flutter-security --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/flutter/flutter-security .opencode/skills/flutter-security && 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 "flutter-security" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/flutter/flutter-security into .opencode/skills/flutter-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "flutter-security", 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
flutter-security- GitHub stars
- 572
- Token cost
- ~576 tokens
- SKILL.md length
- 188 words
- Files
- 5 (incl. references)
- Skills in repo
- 211
- Repo updated
- First seen
- Licence
- MIT
At a glance
Secure Flutter token/PII storage, build-time secrets, network trust, and release hardening using OWASP Mobile practices.
- Works in 6 steps: Store secrets securely — Use… → Externalize secrets — Never store API… → Obfuscate releases — Build --obfuscate… → …
- Secret injection
- SKILL.md covers Priority: P0 (CRITICAL), Implementation Workflow, Reference & Examples and Anti-Patterns, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Flutter Security is an agent skill from HoangNguyen0403/agent-skills-standard. Secure Flutter token/PII storage, build-time secrets, network trust, and release hardening using OWASP Mobile practices. Use for secure storage, secret injection, certificate pinning, jailbreak/root risk, or release builds—not generic form validation, API error handling, auth-provider setup, or tests of existing security services.
Its SKILL.md is about 580 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including reference files (for example `evals/evals.json`, `references/REFERENCE.md` and `references/implementation.md`).
It sits in Mobile, covering Cross-platform mobile apps, App store release and LLM guardrails. It works with Flutter and Dart. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.
When your agent uses it
- Secret injection
- Certificate pinning
- Jailbreak/root risk
- Release builds—not generic form validation
Example prompts
- “/flutter-security”
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Store secrets securely — Use flutter_secure_storage for tokens/PII. Never use shared_preferences for sensitive data.
- Externalize secrets — Never store API keys in Dart code. Use --dart-define or .env files.
- Obfuscate releases — Build --obfuscate --split-debug-info=./symbols. Deterrent only — move sensitive logic to backend.
- Pin certificates — dio_certificate_pinning for high-security apps to prevent MITM.
- Root detection — flutter_jailbreak_detection for root/jailbreak checks in financial/sensitive apps.
- Mask PII — Redact PII (email, phone) from all logs and analytics.
What it can do on your machine
Read from SKILL.md and the folder at commit b529c2d. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
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
Flutter Security loads about 576 tokens when it runs, and up to ~960 if it reads all its reference files. Until then it costs about 87 tokens; SKILL.md has 188 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.
- NoteMentions a .env fileSKILL.md:25
ys in Dart code. Use `--dart-define` or `.env` files.
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 HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 188 words, ~576 tokens.
Download SKILL.mdSave it as
.claude/skills/flutter-security/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.- name
- flutter-security
- description
- Secure Flutter token/PII storage, build-time secrets, network trust, and release hardening using OWASP Mobile practices. Use for secure storage, secret injection, certificate pinning, jailbreak/root risk, or release builds—not generic form validation, API error handling, auth-provider setup, or tests of existing security services.
Mobile Security
Priority: P0 (CRITICAL)
Implementation Workflow
- Store secrets securely — Use
flutter_secure_storagefor tokens/PII. Never useshared_preferencesfor sensitive data. - Externalize secrets — Never store API keys in Dart code. Use
--dart-defineor.envfiles. - Obfuscate releases — Build
--obfuscate --split-debug-info=./symbols. Deterrent only — move sensitive logic to backend. - Pin certificates —
dio_certificate_pinningfor high-security apps to prevent MITM. - Root detection —
flutter_jailbreak_detectionfor root/jailbreak checks in financial/sensitive apps. - Mask PII — Redact PII (email, phone) from all logs and analytics.
Secure Storage & Release Build Examples
See implementation examples for secure storage usage and obfuscated release build commands.
Reference & Examples
SSL Pinning & Secure Storage: references/REFERENCE.md.
Anti-Patterns
- No Secrets in SharedPreferences: Use
flutter_secure_storagefor tokens and PII - No Hardcoded API Keys: Use
--dart-defineor secure vaults for all secrets - No Unobfuscated Releases: Always build with
--obfuscate --split-debug-info - No PII in Logs: Mask or omit sensitive data from all logs and analytics events
Related Topics
common/security-standards | layer-based-clean-architecture | performance
Canonical response anchors
When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:
- certificate pinning,SSL pinning
Remediation anchors
- Remediation anchors: root/jailbreak detection, --obfuscate, --split-debug-info
© HoangNguyen0403, 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 4 other files (references) in skills/flutter/flutter-security of HoangNguyen0403/agent-skills-standard.
- SKILL.md
- evals/evals.json
- references/REFERENCE.md
- references/implementation.md
- references/network-security.md
Open the folder on GitHubat commit b529c2d
Compare with similar skills
Flutter Security 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 |
|---|---|---|---|---|---|---|
| Flutter Security this skillHoangNguyen0403/agent-skills-standard | 572 | — | ~576 | Automated safety check: Notes | MIT | |
| Flutter Appccplugins/awesome-claude-code-plugins | 970 | — | ~1.1k | Automated safety check: Notes | Apache-2.0 | |
| Mobile Developeraiskillstore/marketplace | 433 | 7 repos | ~2.3k | Automated safety check: Pass | None | |
| FlutterEliasOulkadi/shokunin | 114 | — | ~3.2k | Automated safety check: Pass | MIT | |
| Engine Whats Newflutter/flutter | 180k | — | ~978 | Automated safety check: Pass | BSD-3-Clause | |
| Flutter Cherry Pickflutter/flutter | 180k | — | ~1.8k | Automated safety check: Pass | BSD-3-Clause |
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Questions about Flutter Security
What does Flutter Security do?
Secure Flutter token/PII storage, build-time secrets, network trust, and release hardening using OWASP Mobile practices. Flutter Security is an agent skill from HoangNguyen0403/agent-skills-standard. Secure Flutter token/PII storage, build-time secrets, network trust, and release hardening using OWASP Mobile practices.
When should I use Flutter Security?
Flutter Security fits situations like: secret injection; certificate pinning; jailbreak/root risk; release builds—not generic form validation.
How do I install Flutter Security in Claude Code?
Run `npx skills add HoangNguyen0403/agent-skills-standard --skill flutter-security -a claude-code`. Or copy the skill folder (skills/flutter/flutter-security in HoangNguyen0403/agent-skills-standard) into .claude/skills/flutter-security in your project. Claude Code loads it when a task matches its description.
How do I install Flutter Security in Codex?
Run `npx skills add HoangNguyen0403/agent-skills-standard --skill flutter-security -a codex`. Or copy the skill folder (skills/flutter/flutter-security in HoangNguyen0403/agent-skills-standard) into .agents/skills/flutter-security in your project. Codex loads it when a task matches its description.
Can I use Flutter Security 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 HoangNguyen0403/agent-skills-standard --skill flutter-security -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/flutter-security, .gemini/skills/flutter-security, .github/skills/flutter-security and .opencode/skills/flutter-security in your project.
What does Flutter Security need to run?
SKILL.md names no scripts, command-line tools or credentials: Flutter Security is instructions for the agent only.
Does Flutter Security 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 Flutter Security safe to install?
Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Flutter Security use?
Flutter Security 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 Flutter Security use?
About 576 tokens (SKILL.md is roughly 2.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 384 tokens, read only when the agent opens those files.
What are the alternatives to Flutter Security?
Skills that share tags, products or a category with Flutter Security: Flutter App (ccplugins/awesome-claude-code-plugins, 970 stars), Mobile Developer (aiskillstore/marketplace, 433 stars), Flutter (EliasOulkadi/shokunin, 114 stars) and Engine Whats New (flutter/flutter, 180k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Flutter Security?
HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.
Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.