spec-finish

spec-finish is a skill for Claude Code from martinffx/atelier. It costs 73 tokens per session (997 once invoked), scanned A, original, MIT.

A completion workflow for a software change that has already been implemented from a structured plan. It simplifies the result, updates needed documentation, validates the work, reviews it, and prepares a pull request.

In plain words
What is it for?
Use it to compare implementation with the approved scope, update documentation, run validation, conduct review, create commits, and open a pull request.
Why use it?
It provides final checks before handing code to others and helps remove work that was outside the original request. It also verifies prerequisites such as completed tasks, a clean working directory, and passing tests.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Part of the atelier plugin — 14 skills shipped together

Good fit Use it to compare implementation with the approved scope, update documentation, run validation, conduct review, create commits, and open a pull request.

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

Made for: Claude Code.

Or install atelier, the plugin that ships this one along with the rest of its 14 skills.

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 spec-finish

README.md
[![agentmods](https://agentmods.dev/badge/skills/martinffx/atelier/spec-finish.svg)](https://agentmods.dev/skills/martinffx/atelier/spec-finish)
Your own site
<a href="https://agentmods.dev/skills/martinffx/atelier/spec-finish"><img src="https://agentmods.dev/badge/skills/martinffx/atelier/spec-finish.svg" alt="Measured on agentmods" height="20"></a>
Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 997 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00073 $0.00997
Opus 5 $0.00036 $0.00498
Sonnet 5 $0.00015 $0.00199
Haiku 4.5 $0.00007 $0.00100

Measured 8d ago against content hash a6bd8f7d634d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

spec-finish 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 8d 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.

skills/spec-finish/SKILL.md · 167 lines

How it starts

The opening of the file, as written. The whole thing — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spec Finish

Post-implementation workflow: simplify → synchronize docs → validate → review → prepare PR.

Prerequisites

Before starting, verify:

  1. All Spec-backed Plan tasks are complete
  2. Working directory has no unresolved staged or unstaged changes
  3. Tests pass

If not complete, go back to spec-implement.


Step 1: Compare Scope and Simplify

Compare the implementation with the original behavior and user goal before documentation or validation. Remove unrequested scope, duplicate concepts, one-consumer abstractions, and custom machinery that replaces sufficient platform behavior.

If the implementation faithfully follows an unnecessarily large design, stop and return to spec-plan. Get approval for the smaller plan before continuing.

Update the finished SDD to describe the smaller result. Replace rejected architecture in the normative design and plan instead of preserving it as precedent; mention it only as a rejected alternative when that history remains useful.


Step 2: Update Documentation

Check whether README, API documentation, or changelog updates are needed. Make and commit any necessary documentation changes through code-commit before final validation.


Step 3: Validate

Run validation checks.

Test Suite

npm test
# or
pytest
# or
cargo test

Type Check

npm run typecheck
# or
python -m mypy
# or
cargo check

Lint

npm run lint
# or
ruff check .
# or
cargo clippy

Build

npm run build
# or
go build ./...

If any fail: Return to spec-implement to fix.

If all pass: Proceed.


Step 4: Review

Invoke the installed code-review skill through the harness's skill mechanism for one comprehensive review of the final change.

What to Review

  • All changed files since the intended base branch's merge base
  • Test coverage
  • Documentation updates
  • No debug code left

If code-review finds issues

  • Minor fixes may be made here, then re-validated and reviewed.
  • Blocking or scope-changing fixes return to spec-implement.

Read the full file on GitHub · 167 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. 8d ago First seen · 167 lines · 73 tokens per session scan A a6bd8f7d634d

Subscribe to this mod's changes

spec-finish is a skill published in the GitHub repository martinffx/atelier (45 stars, last pushed 29d ago), licensed MIT. It adds 73 tokens to every session and 997 once invoked, about $0.0004 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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