techspec

A technical-specification workflow for turning a product requirements document into an implementation-ready plan for a Flutter app. It examines the project and describes how data, state, screens, and integrations should be built.

In plain words
What is it for?
Use it after writing a PRD to create a technical specification covering reusable project patterns, implementation order, state management, navigation, networking, and backend integration.
Why use it?
It reduces uncertainty before coding by grounding technical decisions in the existing code patterns, architecture, and settled product requirements.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/strvcom/flutter-template/techspec
Any agent
npx skills add strvcom/flutter-template --skill techspec
Clone the repo
git clone --depth 1 https://github.com/strvcom/flutter-template

Made for: Claude Code, Codex.

Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,473 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00064 $0.01473
Opus 5 $0.00032 $0.00737
Sonnet 5 $0.00013 $0.00295
Haiku 4.5 $0.00006 $0.00147

Measured 2d ago against content hash 1e38ee140f62, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

techspec 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 2d 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.

.agents/skills/techspec/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Technical Specification

You are a technical specification expert translating PRDs into implementation-ready specs for this Flutter app. The stack is flutter_riverpod + riverpod_annotation for state, freezed

  • json_serializable for data classes, auto_route for navigation, dio for HTTP, Firebase services for backend, and FVM-pinned Flutter SDK.

Objectives

  1. Translate the PRD into concrete technical guidance grounded in this codebase
  2. Reuse existing patterns from lib/features/<feature>/ and primitives from lib/common/ before proposing new ones
  3. Specify the data → state → UI → integration build order so the tasks skill can break it into ordered work units

Prerequisites

  • Required: .claude/tasks/[feature-name]/prd.md
  • Output: .claude/tasks/[feature-name]/techspec.md

Workflow

Step 0: Load Shared Context

Before reading the PRD, check whether .claude/tasks/[feature-name]/context.md exists. If it does, read it. Use its contents to skip re-deriving already-captured decisions (problem statement, target platforms, key product decisions, out-of-scope items) — do not ask the user about things already settled there.

Step 1: Analyze PRD

Read the PRD at .claude/tasks/[feature-name]/prd.md and extract:

  • Core requirements and constraints
  • Domain entities involved (data shapes, sources, lifetimes)
  • Platform scope — which of Android / iOS / web / desktop are in scope, and whether any platform-specific behaviors apply
  • Whether the feature touches Firebase services, native channels, or other integrations

Step 2: Deep Project Analysis

Explore the codebase to ground the spec in reality:

  • Look for existing features under lib/features/ that follow a similar shape and should be mirrored (the canonical pattern is *_page.dart + *_page_content.dart + *_state.dart + *_event.dart).
  • Check lib/common/ for reusable widgets, extensions, theming, formatters before introducing new primitives.
  • Inspect existing DTOs (lib/common/data/dto/), entities (lib/common/data/entity/), use cases, and providers for naming / mapping conventions. Add a repository layer only if the project already has one for this area or the spec explicitly justifies it.
  • Check lib/app/setup/setup_app.dart to see which services / integrations are actually active versus scaffolded.
  • Read AGENTS.md, docs/PROJECT_OVERVIEW.md, and docs/PROJECT_GUIDELINES.md for the canonical conventions.

Read the full file on GitHub · 139 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. 2d ago First seen · 139 lines · 64 tokens per session scan A 1e38ee140f62

Subscribe to this mod's changes

techspec is a skill published in the GitHub repository strvcom/flutter-template (24 stars, last pushed 2mo ago), licensed MIT. It adds 64 tokens to every session and 1,473 once invoked, about $0.0003 per session on Opus 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 2026-08-30.

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