p5-impl-green

p5-impl-green is a command for Claude Code from jonase47/ccpr. It costs 0 tokens per session (529 once invoked), scanned A, original, MIT.

A TDD implementation command that adds the smallest amount of production code needed to make existing failing tests pass. TDD means writing tests before the code they check.

In plain words
What is it for?
Use it after writing failing tests to implement a feature or story in the project's source files.
Why use it?
It prevents unnecessary design work while turning a defined failing test into working code.

Command for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: reads .claude/ paths.

Good fit Use it after writing failing tests to implement a feature or story in the project's source files.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/jonase47/ccpr/p5-impl-green
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/jonase47/ccpr

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 p5-impl-green

README.md
[![agentmods](https://agentmods.dev/badge/commands/jonase47/ccpr/p5-impl-green/github.svg)](https://agentmods.dev/commands/jonase47/ccpr/p5-impl-green)
Your own site
<a href="https://agentmods.dev/commands/jonase47/ccpr/p5-impl-green"><img src="https://agentmods.dev/badge/commands/jonase47/ccpr/p5-impl-green/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 p5-impl-green

Your own site · 80×15
<a href="https://agentmods.dev/commands/jonase47/ccpr/p5-impl-green"><img src="https://agentmods.dev/badge/commands/jonase47/ccpr/p5-impl-green.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 529 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 $0.00000 $0.00529
Opus 5.5 $0.00000 $0.00212
Sonnet 5.5 $0.00000 $0.00106
Haiku 4.5 $0.00000 $0.00053

Measured 1mo ago against content hash 44269e021aef, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

p5-impl-green 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 1mo 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/p5-impl-green.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/p5-impl-green – Minimal Code for Green Tests (GREEN)

Writes the minimal production code that makes the existing tests green. No over-engineering.

Argument: $ARGUMENTS = [Feature name/Story ID]

If provided: Implement code for the named feature. If not provided: Ask which feature should be implemented.

Prerequisites

  • /p5-impl-red completed (failing tests exist)

Agent

  • Type: senior-developer
  • Model: sonnet

Context (Orchestrator prepares)

Orchestrator reads beforehand and provides inline:

  • From tests/: the failing test files (complete)
  • From ARCHITECTURE.md: affected modules, file structure (relevant section only)
  • From SECURITY.md: security checklist (affected points only)

Prompt Template

Goal: Write minimal production code that makes all tests green for Story [ID]: [Title]

Failing Tests: [inline from tests/]

Architecture Guidelines: [inline from ARCHITECTURE.md]

Output Format:

  • Production code file(s) in the src/ directory
  • At the end: summary of which files were created/changed

Constraints:

  • ONLY as much code as needed to make tests green
  • No over-engineering, no anticipatory abstractions
  • Follow security checklist from SECURITY.md
  • All tests must be green after implementation

Orchestrator Checkpoint

  • All tests green?
  • No unnecessary code written?
  • Security checklist followed?
  • Commit after GREEN: feat: [Story-ID] [Description]

Output

  • Production code file(s) in src/

Handover Epilog

Update docs/HANDOVER.md:

  • What was created/changed
  • Open decisions → the ## Open Decisions table; a finding outside this command's scope goes to the ## Open Points inbox instead
  • Next Steps (according to ~/.claude/docs/NEXT_STEPS_REFERENCE.md)

Recommend 1-3 sensible next commands to the user:

  1. Read docs/HANDOVER.md for the current project status
  2. Consult ~/.claude/docs/NEXT_STEPS_REFERENCE.md for allowed transitions
  3. Only suggest commands that match the current phase/sub-command status
  4. If the current phase appears complete: recommend the gate

Read the full file on GitHub · 65 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. 1mo ago Changed 44269e021aef
  2. 1mo ago First seen · 65 lines · 0 tokens per session scan A 136e74da4ae5

Subscribe to this mod's changes

p5-impl-green is a command published in the GitHub repository jonase47/ccpr (1 stars, last pushed 29d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 529 tokens. 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 2026-09-03.