author-spec

author-spec is a skill for Claude Code from chan4lk/specclaw. It costs 104 tokens per session (501 once invoked), scanned A, original, MIT.

An interactive assistant for writing spec.md, the detailed specification for an approved software change, from its proposal.

In plain words
What is it for?
Use it after a proposal is approved to create or update a specclaw specification, with guided exercises such as asking why, considering alternatives, and identifying must-have work.
Why use it?
It helps turn vague ideas into clearer requirements by asking questions and testing the reasoning behind each section.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions subagents.

Part of the specclaw plugin — 32 skills, 21 agents shipped together

Good fit Use it after a proposal is approved to create or update a specclaw specification, with guided exercises such as asking why, considering alternatives, and identifying must-have work.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/chan4lk/specclaw/author-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 chan4lk/specclaw --skill author-spec
Clone the repo
git clone --depth 1 https://github.com/chan4lk/specclaw

Made for: Claude Code.

Or install specclaw, the plugin that ships this one along with the rest of its 32 skills, 21 agents.

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 author-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/chan4lk/specclaw/author-spec/github.svg)](https://agentmods.dev/skills/chan4lk/specclaw/author-spec)
Your own site
<a href="https://agentmods.dev/skills/chan4lk/specclaw/author-spec"><img src="https://agentmods.dev/badge/skills/chan4lk/specclaw/author-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 author-spec

Your own site · 80×15
<a href="https://agentmods.dev/skills/chan4lk/specclaw/author-spec"><img src="https://agentmods.dev/badge/skills/chan4lk/specclaw/author-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 104 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 501 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 $0.00104 $0.00501
Opus 5 $0.00052 $0.00251
Sonnet 5 $0.00021 $0.00100
Haiku 4.5 $0.00010 $0.00050

Measured 9d ago against content hash b4ecd8be5aad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

author-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 9d 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.

plugins/specclaw/skills/author-spec/SKILL.md · 19 lines

What it actually says

specclaw author-spec

First, run specclaw-ensure-init .specclaw — idempotently creates .specclaw/ if it doesn't exist (silent if already initialized; auto-inits using the current directory's basename as the project name).

Interactively author spec.md for an approved proposal.

  1. Validate: run specclaw-validate-change .specclaw <change> plan. If it fails (typically: proposal.md missing), report the missing prerequisite and stop.
  2. Check for existing spec: if .specclaw/changes/<change>/spec.md already exists, show the user the first few lines and ask whether to overwrite. Default is no — abort if the user does not explicitly confirm overwrite.
  3. Invoke the agent: call the spec-author subagent via the Agent tool with subagent_type: "spec-author" and a prompt instructing it to author the spec for <change>. The agent reads proposal.md and writes spec.md itself; do not wrap the dialogue in this skill.
  4. Update status: specclaw-update-status .specclaw.
  5. GitHub sync (if github.sync: true in config.yaml): specclaw-gh-sync update .specclaw <change> to refresh the issue with the new spec.
  6. Azure Boards sync (if azdo.boards.sync: true): specclaw-azdo-issue update .specclaw <change>.

Do not proceed to /specclaw:plan automatically. After spec.md is written, the user can run /specclaw:plan <change> (which will use the freshly-authored spec.md and generate design.md + tasks.md) when ready.

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. 9d ago First seen · 19 lines · 104 tokens per session scan A b4ecd8be5aad

Subscribe to this mod's changes

author-spec is a skill published in the GitHub repository chan4lk/specclaw (12 stars, last pushed 5d ago), licensed MIT. It adds 104 tokens to every session and 501 once invoked, about $0.0005 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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