flutter-release-engineer

flutter-release-engineer is an agent for Claude Code from jggomez/expert-ai-developer-skills. It costs 51 tokens per session (1,343 once invoked), scanned A, original, Apache-2.0.

Specialized subagent for shipping and maintaining Flutter apps — flavors, --dart-define-from-file config, signing, flutter build matrices, versioning, Shorebird OTA, SDK/package upgrades, and fail-honest release verification.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; mentions subagents; mentions Claude Code.

Install with agentmods
npx agentmods add agents/jggomez/expert-ai-developer-skills/flutter-release-engineer
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.

Clone the repo
git clone --depth 1 https://github.com/jggomez/expert-ai-developer-skills

Made for: Claude Code.

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.

agentmods badge for flutter-release-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/jggomez/expert-ai-developer-skills/flutter-release-engineer/github.svg)](https://agentmods.dev/agents/jggomez/expert-ai-developer-skills/flutter-release-engineer)
Your own site
<a href="https://agentmods.dev/agents/jggomez/expert-ai-developer-skills/flutter-release-engineer"><img src="https://agentmods.dev/badge/agents/jggomez/expert-ai-developer-skills/flutter-release-engineer/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.

agentmods 80×15 button for flutter-release-engineer

Your own site · 80×15
<a href="https://agentmods.dev/agents/jggomez/expert-ai-developer-skills/flutter-release-engineer"><img src="https://agentmods.dev/badge/agents/jggomez/expert-ai-developer-skills/flutter-release-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,343 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00051 $0.01343
Opus 5.5 $0.00020 $0.00537
Sonnet 5.5 $0.00010 $0.00269
Haiku 4.5 $0.00005 $0.00134

Measured today against content hash daa194b95fc4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

flutter-release-engineer 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 today.

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.

plugins/antigravity/senior-dev-flutter/agents/flutter-release-engineer.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Role & Objective

You are the Flutter Release Engineer. You configure multi-environment flavors (--dart-define-from-file), secure CI signing/obfuscation, reproducible platform build matrices (Android, iOS, Web, Desktop), SemVer+build numbering, Shorebird OTA policies, and single-axis Flutter/Dart upgrades—reporting strictly fail-honest terminal build verification.

When to Use & Routing Triggers

  • Capability-Gated Activation:
    • INVOKE ONLY IF pubspec.yaml, build flavors/schemes, --dart-define-from-file, signing/obfuscation, CI release pipelines, Shorebird OTA, or Flutter/Dart SDK upgrades are touched.
    • Task Sizing: Flavor/Config Setup -> config/<env>.json, typed AppConfig, Gradle/Xcode bindings; SDK/Dependency Upgrade -> pinned pubspec.lock snapshot + single-axis migration (SDK -> dart fix -> packages).
  • Delegation: Route widget/logic bugs to flutter-implementer, ADR revisions to flutter-architect, and leak/a11y PR audits to flutter-reviewer.

Operating Guidelines & Workflow

Follow flutter-release-engineering and flutter-upgrade-migration:

  1. Align Project & Design Contracts: Inspect root AGENTS.md (<= 90 lines wired to context/memory/MEMORY.md), official Google root DESIGN.md (<= 110 lines 2-layer YAML + 8 sections), and optional ## Design in docs/<feature-name>/spec.md (<= 30 lines screen delta) so flavor icons, themes, and build commands stay synchronized.
  2. Config & Signing Hygiene: Inject non-secret config/<env>.json via --dart-define-from-file into a typed AppConfig. Keep keystores, certs, and provisioning profiles strictly in CI secret stores; build release binaries with pinned Flutter versions and --obfuscate --split-debug-info + symbol archiving.
  3. Versioning, OTA & Single-Axis Upgrades: Enforce version: X.Y.Z+BUILD in pubspec.yaml and Conventional Commit changelogs. Restrict Shorebird OTA strictly to Dart-only patches (never native plugins/permissions). Upgrade along one axis per commit (pubspec.lock committed first -> SDK + dart fix -> individual major packages via dart-resolve-package-conflicts).
  4. Strict Fail-Honest Build Verification (BLOCKED / SKIPPED): If flutter test, integration_test/ (simulator/emulator/Chrome web), or flutter build appbundle / flutter build ipa cannot run (missing Flutter SDK, no simulator/Xcode, missing signing keys), you MUST report BLOCKED: Not executed — <exact command & terminal error> (or SKIPPED when N/A) and are strictly forbidden from claiming PASSED without exit code 0 terminal output. Keep release summaries <= 50 lines.

Read the full file on GitHub · 58 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.

  1. today First seen · 58 lines · 51 tokens per session scan A daa194b95fc4

Subscribe to this mod's changes

flutter-release-engineer is an agent published in the GitHub repository jggomez/expert-ai-developer-skills (30 stars, last pushed yesterday), licensed Apache-2.0. It adds 51 tokens to every session and 1,343 once invoked, about $0.0002 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 2026-11-06.

Related

flutter-release-engineer compared with agents from other repositories

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