Implement

What it does

When your agent uses it

• Implement a feature from its tasks.json with test-driven development — writes a failing test first
• Commits per task
• Implement {slug}
• Code up the tasks for {slug}

Example prompts

• “implement {slug}”
• “build {slug}”
• “TDD {slug}”
• “/implement”

Requirements

• Docker

Workflow steps

10 steps, taken from the first numbered list in SKILL.md.

1. 1Preconditions. Verify tasks.json exists and parses; load the upstream artifacts list. Detail → ./references/inputs.md.
2. 2Ensure the settings file (first thing, after this skill's own gate). If .claude/sdd.local.md is absent, create it now from the canonical…
3. 3Detect commands. Run the stack-agnostic cascade (settings override → Makefile → package scripts → language manifests → Docker probe for…
4. 4Build the DAG. Parse tasks.json, validate deps is acyclic, topologically sort into phases (Kahn). Compute task_count, longest_chain…
5. 5Pick the mode. Run the decision tree (below; full form → ./references/decision-tree.md). Apply the guards.
6. 6Generate the run-plan. Sequential → an ordered task list. Team → a shared TaskList with the full task text in each body. Workflow → a…
7. 7Banner. Print the active mode and the settings that drove it: mode=<…> tdd=<…> isolation=<…> parallel= integration=<…>. The user sees…
8. 8Execute in the chosen mode. Every task runs the TDD cycle → ./references/tdd-loop.md. A layer: migration task first promotes its staged…
9. 9Per-task gate + commit. After GREEN+REFACTOR: unit + (integration if available) + lint + vet must be clean, then commit task-scoped with…
10. 10Summary + hand off. Report covered AC, commits made (with SDD-Task trailers), any task dropped/blocked, and the per-task gate results…

What it can do on your machine

Read from SKILL.md and the folder at commit 4403913. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md.

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Implement loads about 2.5k tokens when it runs, and up to ~12k if it reads all its reference files. Until then it costs about 180 tokens; SKILL.md has 1,036 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~180

When it runs · the whole SKILL.md, loaded when a task matches

~2.5k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~12k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from genkovich/sdd at commit 4403913, republished under its MIT licence (© genkovich). 1,036 words, ~2,509 tokens.

name

implement

description

Use to implement a feature from its tasks.json with test-driven development — writes a failing test first, makes it pass, refactors, gates, and commits per task. Triggers on "implement {slug}", "build {slug}", "TDD {slug}", "code up the tasks for {slug}", "/sdd:implement {slug}", "імплементуй {slug}", "реалізуй фічу {slug}", "напиши код за задачами". Reads docs/features/{slug}/tasks.json + the upstream artifacts, detects the repo's test/lint/vet commands stack-agnostically, builds a dependency DAG, and runs one of three modes — sequential single-agent TDD, an agent team (TeamCreate), or a dynamic Workflow — chosen from settings + DAG shape with graceful fallback. Hard-refuses if tasks.json is missing.

model

inherit

effort

medium

agents

test-author, implementer, reviewer

parallel_eligible := isolation==worktree AND max_parallel>1 AND parallel_width>=2
                     AND (size in {M,L,XL} OR task_count>=4)

if team_mode AND parallel_eligible:                          → AGENT TEAM (TeamCreate) over the DAG
elif workflow_mode=="auto" AND parallel_eligible AND Workflow-available: → DYNAMIC WORKFLOW
else:                                                        → SEQUENTIAL single-agent TDD (topo order)

© genkovich, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 8 other files (references) in skills/implement of genkovich/sdd.

• SKILL.md
• references/command-detection.md
• references/decision-tree.md
• references/escalation.md
• references/inputs.md
• references/settings.md
• references/tdd-loop.md
• references/team-exec.md
• references/workflow-exec.md

Open the folder on GitHubat commit 4403913