write-tech-spec

write-tech-spec is a skill for Claude Code, Codex from qinghaoliqaq/AutoCoder. It costs 61 tokens per session (1,148 once invoked), scanned A, original, Apache-2.0.

A skill that writes a technical specification—a reviewed plan for building a change—before code is written. It saves the document as specs/<id>/TECH.md.

In plain words
What is it for?
Use it when someone requests a spec, technical design, or implementation plan, or when a change spans several modules or involves an architectural decision.
Why use it?
It turns a large or risky coding task into a concrete plan grounded in the existing codebase, reducing the chance of rework.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: names the AskUserQuestion tool.

Good fit Use it when someone requests a spec, technical design, or implementation plan, or when a change spans several modules or involves an architectural decision.

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Install with agentmods
npx agentmods add skills/qinghaoliqaq/autocoder/write_tech_spec
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 qinghaoliqaq/AutoCoder --skill write_tech_spec
Clone the repo
git clone --depth 1 https://github.com/qinghaoliqaq/AutoCoder

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 write-tech-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/qinghaoliqaq/autocoder/write_tech_spec/github.svg)](https://agentmods.dev/skills/qinghaoliqaq/autocoder/write_tech_spec)
Your own site
<a href="https://agentmods.dev/skills/qinghaoliqaq/autocoder/write_tech_spec"><img src="https://agentmods.dev/badge/skills/qinghaoliqaq/autocoder/write_tech_spec/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 write-tech-spec

Your own site · 80×15
<a href="https://agentmods.dev/skills/qinghaoliqaq/autocoder/write_tech_spec"><img src="https://agentmods.dev/badge/skills/qinghaoliqaq/autocoder/write_tech_spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,148 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 $0.00061 $0.01148
Opus 5.5 $0.00024 $0.00459
Sonnet 5.5 $0.00012 $0.00230
Haiku 4.5 $0.00006 $0.00115

Measured 1mo ago against content hash bbbebd5aea07, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

write-tech-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 1mo 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.

src-tauri/src/bundled_skills/write_tech_spec/SKILL.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Write Tech Spec

This skill produces a technical specification grounded in the current codebase, not a wish-list. The output is a markdown file at specs/<id>/TECH.md that the team (or your future self) can review, critique, and then hand back to an agent for implementation.

When To Use

Use this skill when:

  • The user explicitly asks for a spec / tech spec / design doc
  • The task touches more than two modules and requires a plan before diving in
  • A naive implementation would risk breaking other parts of the codebase
  • You're about to make a non-trivial architectural decision and want it written down before you commit

Do not use this for trivial fixes (one-line changes, typos, single- function refactors). Spec-writing has a fixed cost; spend it where it actually saves rework.

Spec Directory Layout

specs/<id>/
  TECH.md           ← this skill writes this
  PRODUCT.md        ← optional; product-level "what & why"
  PROJECT_LOG.md    ← optional; running log for multi-day work
  DECISIONS.md      ← optional; ADR-style decision records

<id> is one of:

  • a GitHub issue id like gh-1063
  • a ticket id like APP-3076
  • a short kebab-case slug like parallel-subtask-merge

Pick one and use it consistently. If unsure, ask the user (via AskUserQuestion) or default to a slug derived from the task title.

TECH.md Required Sections

Every TECH.md must have these sections, in this order, with these exact H2 headings:

# <Title>

## Context
## Current State
## Proposed Changes
## End-to-End Flow
## Implementation Plan
## Testing
## Risks & Open Questions

Section guidance

  • Context (3–6 bullets) — Why are we doing this? What's the user- facing motivation? Link to the relevant PRODUCT.md or issue if one exists.

  • Current State — Summarize how the codebase handles the relevant area today. Every claim must be cited with a file:line reference. Use Read / Grep to verify before citing. If you cite a file you didn't read, you've failed this skill.

Read the full file on GitHub · 140 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. 1mo ago First seen · 140 lines · 61 tokens per session scan A bbbebd5aea07

Subscribe to this mod's changes

write-tech-spec is a skill published in the GitHub repository qinghaoliqaq/AutoCoder (12 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 61 tokens to every session and 1,148 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 2026-08-30.