Borrowing it
Nothing to install: this file belongs to rhyanvargas/agentic-development-starter-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/rhyanvargas/agentic-development-starter-kit/main/.cursor/commands/implement-spec.mdgit clone --depth 1 https://github.com/rhyanvargas/agentic-development-starter-kitWrote 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.
[](https://agentmods.dev/commands/rhyanvargas/agentic-development-starter-kit/implement-spec)<a href="https://agentmods.dev/commands/rhyanvargas/agentic-development-starter-kit/implement-spec"><img src="https://agentmods.dev/badge/commands/rhyanvargas/agentic-development-starter-kit/implement-spec/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.
<a href="https://agentmods.dev/commands/rhyanvargas/agentic-development-starter-kit/implement-spec"><img src="https://agentmods.dev/badge/commands/rhyanvargas/agentic-development-starter-kit/implement-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.00401 |
| Opus 5.5 | $0.00000 | $0.00160 |
| Sonnet 5.5 | $0.00000 | $0.00080 |
| Haiku 4.5 | $0.00000 | $0.00040 |
Grade A, and why
implement-spec 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 2mo 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.
What it actually says
/implement-spec
Implement from a specification or plan.
Skill
Read and follow skills/spec-driven-workflow. Honor @.cursor/rules/testing and @.cursor/rules/project-cmds for tests and verify commands. When the engineering-methods pack is installed, follow test-driven-development (and systematic-debugging on failures) — see docs/engineering-methods.md.
Usage
/implement-spec path/to/spec-or-plan.md
Behavior
- Clear (Medium+): confirm exploration is persisted in the living spec/plan; start this session lean — see skill gated procedure. Handoff: read living spec + plan + latest progress before coding (
references/session-handoff.md). If the living spec changed after the plan was written, resync (/plan-impl) before coding. - Read the spec or plan; follow the plan step-by-step when present. For bugfix specs, honor the Unchanged (KEEP) fence.
- Implement with tests mapped to requirements (or justify non-behavioral exceptions).
- Update plan todo status as steps complete (Cursor Plan YAML
todosand/or portable checklist — seereferences/cursor-adapter.md/artifact-homes.md). - Fail-closed verify: run
project-cmds/ project verify; fix failures before claiming done. If verify is missing, refuse “done” and point to/quick-start— do not invent a silent pass. - Session end (Medium+ incomplete): update the plan/spec Handoff / Progress section (done / files touched / next REQ or T# / git expectation) per
session-handoff.md. - Suggest
/reviewwhen implementation is complete — do not treat this session’s self-check as the evaluate pass (references/review-evaluator.md).
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.
- 2mo ago First seen · 24 lines · 0 tokens per session scan A 4b4dff1fb869
implement-spec is a command published in the GitHub repository rhyanvargas/agentic-development-starter-kit (2 stars, last pushed 4d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 401 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.
implement-spec compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| implement-specrhyanvargas/agentic-development-starter-kit | Command | 2 | 4d ago | Apache-2.0 | A | 0 | Claude Code, Cursor |
| checklistgithub/spec-kit | Command | 148k | yesterday | MIT | A | 13 | Claude Code |
| clarifygithub/spec-kit | Command | 148k | yesterday | MIT | A | 27 | Claude Code |
| specifygithub/spec-kit | Command | 148k | yesterday | MIT | A | 13 | Claude Code |
| analyzegithub/spec-kit | Command | 148k | yesterday | MIT | A | 26 | Claude Code |
| convergegithub/spec-kit | Command | 148k | yesterday | MIT | A | 35 | Claude Code |
| implementgithub/spec-kit | Command | 148k | yesterday | MIT | A | 14 | Claude Code |