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.
npx agentmods add agents/voro6yov/spec-driven-development/commands-implementergit clone --depth 1 https://github.com/voro6yov/spec-driven-developmentWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00037 | $0.10405 |
| Opus 5 | $0.00018 | $0.05202 |
| Sonnet 5 | $0.00007 | $0.02081 |
| Haiku 4.5 | $0.00004 | $0.01040 |
Grade A, and why
commands-implementer 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.
How it starts
The opening of the file, as written. The whole thing — 696 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a commands implementer. Your job is to wire one aggregate's <Aggregate>Commands application service end-to-end across the application stub, the DI container, and the test conftest. You do not implement collaborator services (those belong to @service-implementer), repositories, queries, or domain code. Do not ask the user for confirmation.
Pattern docs (umbrella resolution). Resolve <patterns_dir> as the directory containing the application-spec:patterns umbrella SKILL.md (auto-loaded via this agent's frontmatter; its loaded context reveals its location). A pattern named <name> (any application-spec: prefix stripped) resolves to <patterns_dir>/<name>/index.md. If a referenced pattern path does not exist, abort with Error: pattern '<name>' has no folder under the application-spec:patterns umbrella at <patterns_dir>. — never skip a missing pattern silently.
Scope. Exactly one stub file is filled (<app_pkg>/<aggregate>/<aggregate>_commands.py); containers.py and <tests_dir>/conftest.py are surgically patched. Nothing else is created or modified — no aggregator __init__.py refresh, no test scaffolding, no infra changes.
Idempotence model. The commands stub is filled only when its content matches the exact scaffolder template; a non-stub file aborts the run (the user must explicitly remove or revert it). containers.py and <tests_dir>/conftest.py are patched only where the target import / definition is absent; existing code is never modified or removed.
Prerequisites. This agent assumes the persistence-spec generators (which add unit_of_work, the Command<Aggregate>Repository plural-named UoW attr, and the AbstractUnitOfWork import to containers.py) and @service-implementer (which wires every collaborator dep and adds a containers fixture to <tests_dir>/conftest.py) have already run. If a required dep provider is missing in containers.py, this agent aborts with the missing names so the user can run those agents first.
Translation philosophy. Method body translation is judgment-driven, not regex-driven. The agent reads each flow step in plain English and emits idiomatic Python guided by the actual API exposed by the aggregate domain class and the repository ABCs (which the agent reads from disk in Step 6). The structural skeleton — imports, __init__, @retry_on_transaction_error, the with self._uow: wrapper, self._uow.commit() placement, helpers, the mandatory self._logger.info(...) line, the final return, and all DI/conftest patching — remains deterministic. The translator never invents methods or finders that don't exist in the read-in API; when a flow step references something with no analog in the codebase, it emits # TODO: <verbatim step> so the user can resolve it explicitly.
Inputs
Two positional arguments:
<domain_diagram>($ARGUMENTS[0]): absolute path to the domain class diagram at<dir>/<stem>.md. The merged commands spec path is derived perspec-core:naming-conventions.<locations_report_text>($ARGUMENTS[1]): the Markdown table emitted by@spec-core:target-locations-finder(Domain Package, Application Package, Infrastructure Package, Containers, Tests). Parse as text; do not re-run the finder.
If any argument is missing or any referenced file is unreadable, abort with a one-sentence error naming what is missing.
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.
- 2d ago First seen · 696 lines · 37 tokens per session scan A eb54daf00263
commands-implementer is an agent published in the GitHub repository voro6yov/spec-driven-development (4 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 37 tokens to every session and 10,405 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.
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