technical-spec

technical-spec is a skill for Claude Code, Codex from shinpr/ai-coding-project-boilerplate. It costs 23 tokens per session (1,063 once invoked), scanned A, original, MIT.

A technical design guide for configuring environment variables, planning software structure, and choosing build and test commands. It checks repository files first so recommendations match the project.

In plain words
What is it for?
Use it when setting up configuration, designing modules and data flow, or deciding how to build and verify a TypeScript application.
Why use it?
It reduces mistakes caused by assuming which tools, runtimes, commands, or settings a project uses. It also highlights decisions that must be settled before architecture or security can be handled correctly.

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/shinpr/ai-coding-project-boilerplate/technical-spec
Any agent
npx skills add shinpr/ai-coding-project-boilerplate --skill technical-spec
Clone the repo
git clone --depth 1 https://github.com/shinpr/ai-coding-project-boilerplate

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.

agentmods badge for technical-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/shinpr/ai-coding-project-boilerplate/technical-spec.svg)](https://agentmods.dev/skills/shinpr/ai-coding-project-boilerplate/technical-spec)
Your own site
<a href="https://agentmods.dev/skills/shinpr/ai-coding-project-boilerplate/technical-spec"><img src="https://agentmods.dev/badge/skills/shinpr/ai-coding-project-boilerplate/technical-spec.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,063 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 $0.00023 $0.01063
Opus 5 $0.00012 $0.00531
Sonnet 5 $0.00005 $0.00213
Haiku 4.5 $0.00002 $0.00106

Measured today against content hash 73bc19165e2d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

technical-spec 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.

.claude/skills-en/technical-spec/SKILL.md · 99 lines

How it starts

The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Technical Design Rules

Prerequisite Detection

Inspect manifests, lockfiles, build/test configuration, CI definitions, and representative source files before applying a technology- or command-specific rule. Treat a tool, script, path alias, or runtime as observed only when repository evidence names it. Label conclusions from surrounding patterns as inferred. When a missing decision changes architecture, compatibility, security, or verification, stop and name the exact configuration or user decision required.

Basic Technology Stack Policy

These rules apply to a TypeScript application when repository configuration confirms that stack. Select architecture by mapping current requirements and accepted constraints to explicit module responsibilities, dependency direction, data flow, and verification boundaries.

Environment Variable Management and Security

Environment Variable Management

  • Centrally manage environment variables and the build-time validation mechanism that enforces their type safety
  • Read environment variables through one typed configuration boundary; application code consumes validated configuration values
  • Give a variable a default only when requirements define valid behavior for absence; otherwise fail configuration validation with the variable name and expected format

Security

  • Keep local .env files outside version control and provide non-secret example files for required variable names
  • Load API keys and secrets from the configured secret store or runtime environment boundary
  • Log and return only fields approved for the current trust boundary; redact credentials, tokens, personal data, and internal diagnostics before returning data across an untrusted boundary

Architecture Design

Architecture Design Principles

Select architecture using these observable decisions:

  • Responsibilities: Each module/layer names the behavior it owns and the behavior it delegates
  • Dependency direction: Imports and runtime calls follow the project boundary rules observed in configuration or representative implementations
  • State/data ownership: Each persisted or mutable value has one authoritative owner
  • Verification boundary: Each public contract has a unit, integration, or E2E check that can observe it

Read the full file on GitHub · 99 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 Changed · -3 lines 73bc19165e2d
  2. 5d ago First seen · 102 lines · 23 tokens per session scan A 6a04da8ee89f

Subscribe to this mod's changes

technical-spec is a skill published in the GitHub repository shinpr/ai-coding-project-boilerplate (228 stars, last pushed today), licensed MIT. It adds 23 tokens to every session and 1,063 once invoked, about $0.0001 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.