feature-builder

feature-builder is a command for Claude Code from The-Artificer-of-Ciphers-LLC/skills-from-the-artificer. It costs 113 tokens per session (30,985 once invoked), scanned A, original, MIT.

An automated workflow for implementing a feature request or integration, including research, design decisions, testing safeguards, and pull-request planning.

In plain words
What is it for?
Use it to build a single feature or decompose a larger feature into several stacked or parallel pull requests.
Why use it?
It breaks large feature work into validated pieces and can coordinate several branches when the work is an epic, meaning a larger request made up of multiple related parts.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

Good fit Use it to build a single feature or decompose a larger feature into several stacked or parallel pull requests.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/the-artificer-of-ciphers-llc/skills-from-the-artificer/feature-builder
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.

Clone the repo
git clone --depth 1 https://github.com/The-Artificer-of-Ciphers-LLC/skills-from-the-artificer

Made for: Claude Code.

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 feature-builder

README.md
[![agentmods](https://agentmods.dev/badge/commands/the-artificer-of-ciphers-llc/skills-from-the-artificer/feature-builder/github.svg)](https://agentmods.dev/commands/the-artificer-of-ciphers-llc/skills-from-the-artificer/feature-builder)
Your own site
<a href="https://agentmods.dev/commands/the-artificer-of-ciphers-llc/skills-from-the-artificer/feature-builder"><img src="https://agentmods.dev/badge/commands/the-artificer-of-ciphers-llc/skills-from-the-artificer/feature-builder/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 feature-builder

Your own site · 80×15
<a href="https://agentmods.dev/commands/the-artificer-of-ciphers-llc/skills-from-the-artificer/feature-builder"><img src="https://agentmods.dev/badge/commands/the-artificer-of-ciphers-llc/skills-from-the-artificer/feature-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 113 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 30,985 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 $0.00113 $0.30985
Opus 5.5 $0.00045 $0.12394
Sonnet 5.5 $0.00023 $0.06197
Haiku 4.5 $0.00011 $0.03098

Measured 13d ago against content hash c6df3409183d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

feature-builder 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 13d 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.

commands/feature-builder.md · 1,579 lines

How it starts

The opening of the file, as written. The whole thing — 1,579 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Engineering Workflow Directive: Feature Implementation & Integrations

<runtime_parameters> Tune before running. Parse from $ARGUMENTS; the defaults below apply when a flag is absent.

Parameter Flag Default Meaning
BASE_BRANCH --base <branch> next Upstream integration branch every PR targets (rebase base).
EPIC_MODE --epic auto|on|off auto auto detects an epic from the issue (Step 2); off forces the single-PR path; on forces decomposition.
AUTONOMOUS --autonomous false When false, every outward write (branch push, PR open, PR merge, label change, sub-issue creation, posting review findings) is surfaced for confirmation before executing. Set true only for fully unattended runs.
MAX_PARALLEL_PRS --max-parallel-prs N 1 How many phase branches may be in flight at once. 1 = strictly stacked/sequential; >1 = parallel worktrees coordinated by Fleet (Step 2.6).

Also: --issue N (the epic or feature issue — required), --repo owner/repo (default: gh repo view --json nameWithOwner -q .nameWithOwner), --phase N (resume a partially-built epic at one deliverable), --plan-only (run Steps 0–2, emit the deployment plan, write nothing).

Arguments: $ARGUMENTS </runtime_parameters>

<follow_ups_and_questions>

💬 FOLLOW-UPS ARE NEVER IGNORED, AND QUESTIONS ARE ASKED, NOT PRINTED

1. Read the whole conversation before acting on any PR or issue. The default gh pr view / gh issue view output is not enough. For every PR or issue you touch, fetch ALL of:

  • issue/PR comments and review summaries: gh pr view $N --json comments,reviews (issues: gh issue view $N --json comments);
  • inline review comments, paginated: gh api --paginate repos/{owner}/{repo}/pulls/$N/comments;
  • review threads with resolution state: GraphQL reviewThreads { isResolved isOutdated comments { author body createdAt } }.

2. Surface every follow-up. A follow-up is any comment, review, or thread reply, from anyone other than you, that is a question, a request ("can you re-review", "please rebase", "why was X changed"), a disagreement with a finding, a reply on a thread you opened, or new information after your last comment/review. Anything unresolved or newer than your last action counts. "The last comment was mine" is NOT a reason to skip: check for follow-ups first. A thread you opened that the author answered is a follow-up, not silence.

Read the full file on GitHub · 1,579 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. 13d ago Changed · +18 lines · +11 tokens per session c6df3409183d
  2. 27d ago Changed · +16 lines e1f8e1db6ef7
  3. 1mo ago Changed · +71 lines f116eb877a6f
  4. 1mo ago First seen · 1,474 lines · 102 tokens per session scan A 74b7c8688e1b

Subscribe to this mod's changes

feature-builder is a command published in the GitHub repository The-Artificer-of-Ciphers-LLC/skills-from-the-artificer (6 stars, last pushed yesterday), licensed MIT. It adds 113 tokens to every session and 30,985 once invoked, about $0.0005 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 2026-08-31.