Spec Kit is an open-source toolkit for defining software requirements and plans before implementation with an AI coding agent. It is used by developers and organizations following a spec-driven development process.
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.
git clone --depth 1 https://github.com/github/spec-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/github/spec-kit/speckit.implement)<a href="https://agentmods.dev/commands/github/spec-kit/speckit.implement"><img src="https://agentmods.dev/badge/commands/github/spec-kit/speckit.implement/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/github/spec-kit/speckit.implement"><img src="https://agentmods.dev/badge/commands/github/spec-kit/speckit.implement.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 | $0.00012 | $0.00165 |
| Opus 5.5 | $0.00005 | $0.00066 |
| Sonnet 5.5 | $0.00002 | $0.00033 |
| Haiku 4.5 | $0.00001 | $0.00016 |
Grade A, and why
speckit.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 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- speckit.implement — 100% identical, 0 lines differ
What it actually says
User Input
$ARGUMENTS
Outline
-
Read
.specify/feature.jsonto get the feature directory path. -
Load context:
.specify/memory/constitution.mdand<feature_directory>/spec.mdand<feature_directory>/plan.mdand<feature_directory>/tasks.md. -
Execute tasks in order:
- Complete each task before moving to the next
- Mark completed tasks by changing
- [ ]to- [x]in<feature_directory>/tasks.md - Halt on failure and report the issue
-
Validate: Verify all tasks are completed and the implementation matches the spec.
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 · 23 lines · 12 tokens per session scan A d50654ebfad9
speckit.implement is a command published in the GitHub repository github/spec-kit (147,879 stars, last pushed yesterday), licensed MIT. It adds 12 tokens to every session and 165 once invoked, about $0.0000 per session on Opus 5.5. 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 2026-08-30.
speckit.implement compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| speckit.implementgithub/spec-kit | Command | 148k | yesterday | MIT | A | 12 | Claude Code |
| book-internalizewordflowlab/novel-writer | Command | 957 | 1y ago | MIT | A | 0 | Claude Code |
| book-stylewordflowlab/novel-writer | Command | 957 | 1y ago | MIT | A | 0 | Claude Code |
| stardust-sessionwordflowlab/novel-writer | Command | 957 | 1y ago | MIT | A | 0 | Claude Code |
| book-characterswordflowlab/novel-writer | Command | 957 | 1y ago | MIT | A | 0 | Claude Code |
| book-formulawordflowlab/novel-writer | Command | 957 | 1y ago | MIT | A | 0 | Claude Code |
| book-rhythmwordflowlab/novel-writer | Command | 957 | 1y ago | MIT | A | 0 | Claude Code |