implement

An implementation workflow that carries out tasks from a software task list and checks the result after each task. TDD means writing a test that fails, then implementing the code until it passes.

In plain words
What is it for?
Use it to run all tasks, continue incomplete work, target one task or feature part, or perform preparation and refactoring tasks while checking the related tests.
Why use it?
It helps keep implementation within the agreed scope and catches problems with tests, project structure, duplicated work, or design constraints as work progresses.

Command

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 commands/andkirby/markdown-ticket/implement
Clone the repo
git clone --depth 1 https://github.com/andkirby/markdown-ticket
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 2,858 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 $0.00000 $0.02858
Opus 5 $0.00000 $0.01429
Sonnet 5 $0.00000 $0.00572
Haiku 4.5 $0.00000 $0.00286

Measured yesterday against content hash 93d164951d23, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

implement 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 yesterday.

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.

prompts/mdt/commands/implement.md · 354 lines

How it starts

The opening of the file, as written. The whole thing — 354 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MDT Implementation Orchestrator (v10)

Execute tasks from a task list with constraint verification after each task.

Core Principle: Verify TDD (RED→GREEN), scope boundaries (flag/STOP), structure, and no duplication after each task.

User Input

$ARGUMENTS

Session Context

Use {TICKETS_PATH} in all file path templates below (if it's not defined read ticketsPath key from .mdt-config.toml).

Execution Modes

Command Behavior
/mdt:implement {CR-KEY} Interactive — auto-detect part or prompt
/mdt:implement {CR-KEY} --prep Execute prep (refactoring) tasks
/mdt:implement {CR-KEY} --part {X.Y} Target specific part
/mdt:implement {CR-KEY} --all Run all tasks, pause at part boundaries
/mdt:implement {CR-KEY} --continue Resume from last incomplete
/mdt:implement {CR-KEY} --task {N.N} Run specific task only

Execution Steps

Step 1: Load Context and Discover Part

1a. Detect mode:

Condition Mode tasks_file tests_file Test Expectation
--prep flag prep prep/tasks.md prep/tests.md GREEN (preserve)
--part X.Y flag part part-X.Y/tasks.md part-X.Y/tests.md RED (TDD)
Single part-*/tasks.md part (auto) that part matching tests RED
Multiple part-*/tasks.md part (prompt) user selects matching tests RED
prep/tasks.md has unchecked items prep (auto) prep/tasks.md prep/tests.md GREEN
No part folders single tasks.md tests.md RED

All paths relative to {TICKETS_PATH}/{CR-KEY}/.

If both prep (incomplete) and part tasks exist, prompt user: [Continue prep (recommended)] [Proceed to feature].

1b. Set CR status to In Progress:

mcp__mdt-all__update_cr_status(project=PROJECT_CODE, key=CR-KEY, status="In Progress")

1c. Load {tasks_file} — extract: scope boundaries, shared patterns/imports, test coverage mapping.

Read the full file on GitHub · 354 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. yesterday First seen · 354 lines · 0 tokens per session scan A 93d164951d23

Subscribe to this mod's changes

implement is a command published in the GitHub repository andkirby/markdown-ticket (5 stars, last pushed 16d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,858 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 2026-08-31.