add-feature

add-feature is a skill for Claude Code, Codex from kunalsuri/ai-fication-kit. It costs 44 tokens per session (547 once invoked), scanned A, original, Apache-2.0.

A repository-specific workflow for adding functionality through a written specification, mapped code locations, a controlled implementation, testing, review, and a knowledge update.

In plain words
What is it for?
Use it when adding or building a feature, especially in a repository with module maps, stability labels, conventions, work logs, and required acceptance checks.
Why use it?
It prevents coding before the expected behavior is agreed, avoids editing protected areas without approval, and keeps feature changes small and verifiable.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it when adding or building a feature, especially in a repository with module maps, stability labels, conventions, work logs, and required acceptance checks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kunalsuri/ai-fication-kit/add-feature
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 kunalsuri/ai-fication-kit --skill add-feature
Clone the repo
git clone --depth 1 https://github.com/kunalsuri/ai-fication-kit

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 add-feature

README.md
[![agentmods](https://agentmods.dev/badge/skills/kunalsuri/ai-fication-kit/add-feature.svg)](https://agentmods.dev/skills/kunalsuri/ai-fication-kit/add-feature)
Your own site
<a href="https://agentmods.dev/skills/kunalsuri/ai-fication-kit/add-feature"><img src="https://agentmods.dev/badge/skills/kunalsuri/ai-fication-kit/add-feature.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 547 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 $0.00044 $0.00547
Opus 5 $0.00022 $0.00273
Sonnet 5 $0.00009 $0.00109
Haiku 4.5 $0.00004 $0.00055

Measured 8d ago against content hash 2d19efd34d33, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

add-feature 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.

.agents/skills/add-feature/SKILL.md · 48 lines

What it actually says

Add a feature

The contract: no code before a spec, no edits to frozen code, no "done" without green tests, no merge without a review and a knowledge update.

1. Spec

If ai/lab/specs/SPEC_<name>.md doesn't exist, draft it from SPEC_TEMPLATE.md (goal, scope, touch list, acceptance criteria, verification). Get the user's OK.

2. Locate

  • ai/guide/MODULE_MAP.md → which modules; note Stability of every target.
  • ai/analysis/FEATURE_CATALOG.md → the "where new code lives" decision tree and the 3-file rule for related features.
  • ai/lab/WORKLOG.md → recent history: was this area just changed? is the behavior deliberate?
  • Keep broad reading read-only and cheap (directory listings, manifests, search hits over whole-file reads) to protect context.

3. Gate

Any file in the touch list with Stability frozen or ? ⇒ stop and ask the human. Record their approval in the spec before proceeding.

4. Implement

Make the smallest diff that satisfies the spec. Conventions per ai/guide/CONVENTIONS.md — see also reference/checklist.md. Match the license headers of neighboring files. No drive-by refactors, no layout changes, no dependency additions unless the plan says so.

5. Verify

Run the narrowest suite that covers the change first, then the suite(s) the spec names. Report command run · exit status · failures verbatim. Red or unrun ⇒ not done.

6. Update knowledge

FEATURE_MAP entry; catalog amendment; MODULE_MAP if layout changed; all [inferred]. Tell the user which tags await their [verified] flip.

7. Review & record

Request /review-change on the diff (fresh context — not this session). Append the work's row to ai/lab/WORKLOG.md linking spec, review, and commits, and move the feature's ai/lab/ROADMAP.md row from Planned to Shipped (cross-link spec, WORKLOG row, and PR by feature ID).

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 48 lines · 44 tokens per session scan A 2d19efd34d33

Subscribe to this mod's changes

add-feature is a skill published in the GitHub repository kunalsuri/ai-fication-kit (3 stars, last pushed 5d ago), licensed Apache-2.0. It adds 44 tokens to every session and 547 once invoked, about $0.0002 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 2026-08-31.