implementing

A workflow for carrying out an approved software change, such as a feature, bug fix, or refactor. It covers checking the repository, making the change on a separate Git branch, testing it, and opening a GitHub pull request when appropriate.

In plain words
What is it for?
Use it when a clear implementation plan has been approved and source code, tests, branches, commits, and a possible pull request all need to be handled.
Why use it?
It helps prevent unplanned edits, unclear scope, and unsafe changes to the main code line. It pauses when requirements, dependencies, or test results reveal an unresolved problem.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/jackfranklin/dotfiles/implementing
Any agent
npx skills add jackfranklin/dotfiles --skill implementing
Clone the repo
git clone --depth 1 https://github.com/jackfranklin/dotfiles

Made for: Claude Code, Codex.

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,288 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00048 $0.01288
Opus 5 $0.00024 $0.00644
Sonnet 5 $0.00010 $0.00258
Haiku 4.5 $0.00005 $0.00129

Measured 2d ago against content hash 1e6dffb167b9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

implementing 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 2d 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.

claude/skills/implementing/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Implementing an Approved Plan

Use this skill only to implement a defined change. Do not start source-code changes until the plan is clear and the user has authorized implementation.

Non-negotiable rules

  1. Implement only a clear plan. Read the plan, relevant source, tests, and repository instructions. Confirm the intended behavior, scope, constraints, affected files, and acceptance criteria. If any material detail is ambiguous, stale, contradictory, or missing, stop before editing and explain the gap with a focused question. Do not fill in requirements from guesswork.
  2. Pause on surprises. If implementation reveals an unexpected challenge or roadblock—such as incompatible existing behavior, a missing dependency or API, a plan assumption that is false, an unexplained test failure, a required design choice, or scope growth—stop work immediately. Explain what happened, its impact, options if useful, and ask the user how to proceed. Do not silently choose a workaround.
  3. Never implement a feature on main. Before any source or test edit, inspect the Git state. Start from a clean worktree and create/switch to a new, clearly named feature branch. If the worktree is dirty, the current branch is not suitable, or branch creation would discard/conflict with work, stop and ask for guidance. Do not commit feature work directly to main.
  4. Test thoroughly by default. Add or update focused unit tests unless the user explicitly says not to. Cover required happy paths, meaningful boundaries, failure/empty states, and behavior likely to regress from the change. Follow repository test conventions; do not add redundant or speculative tests merely to increase the count.
  5. Prefer the simplest clear implementation. Make the narrowest change that meets the approved plan. Prefer direct, readable code over a new abstraction, layer, configuration option, dependency, state model, or extension point. Introduce one only when a current requirement, two real current use cases, or an established repository convention justifies it. Do not refactor nearby code merely to make the change feel cleaner.

Read the full file on GitHub · 74 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. 2d ago First seen · 74 lines · 48 tokens per session scan A 1e6dffb167b9

Subscribe to this mod's changes

implementing is a skill published in the GitHub repository jackfranklin/dotfiles (254 stars, last pushed 9d ago), licensed MIT. It adds 48 tokens to every session and 1,288 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 2026-08-30.

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