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 commands/github/spec-kit-copilot/speckit.specifygit clone --depth 1 https://github.com/github/spec-kit-copilotWhat 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 | $0.00000 | $0.00237 |
| Opus 5 | $0.00000 | $0.00118 |
| Sonnet 5 | $0.00000 | $0.00047 |
| Haiku 4.5 | $0.00000 | $0.00024 |
Grade A, and why
speckit.specify 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.
What it actually says
Sub-Agent Delegation
When executing this command, delegate independent work to parallel sub-agents to reduce total execution time.
How to dispatch sub-agents in Copilot:
- VS Code: Use the
runSubagenttool to spawn each sub-agent in an isolated context. - CLI: Delegate to a sub-agent process — Copilot CLI automatically manages subsidiary sub-agent execution. You can also target custom agents defined in
.github/agents/or~/.copilot/agents/.
Spec Quality Validation
After writing the specification to SPEC_FILE (step 6), dispatch the quality validation as a sub-agent while the main agent prepares the completion report:
- Sub-agent: Quality Validation — "Validate the specification at {SPEC_FILE} against these quality criteria: no implementation details, focused on user value, testable requirements, measurable success criteria, all scenarios defined, edge cases identified, scope bounded. Generate a checklist at {FEATURE_DIR}/checklists/requirements.md. Return: pass/fail status for each item and specific issues found."
If the sub-agent reports failures, address them in the main agent before finalizing.
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.
- yesterday First seen · 17 lines · 0 tokens per session scan A a5c8ec6da25f
speckit.specify is a command published in the GitHub repository github/spec-kit-copilot (11 stars, last pushed 5d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 237 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 2026-08-30.
Other commands, from other repositories
spec-kitty.analyze
Spec-Driven Development for serious software developers. Spec Coding with with Claude, Cursor, Gemini, Codex. Kanban dashboard, git worktrees, auto-merge and more.
sdd-plan
Turn a spec into a persisted baby-step plan file — research, resume, impact analysis.
sdd-setup
Onboarding wizard — DocLanguage, Memory Bank, architecture snapshot, working agreements (quality gate, TDD working mode).
sdd-clarify
Adversarial pass over a finished spec — contradictions, ambiguity, untestable criteria, implementation posing as intent, missing failure modes.
plan
Run /plan — see .claude/commands/plan.md for the authoritative spec.
epic-plan
Run /epic-plan — see .claude/commands/epic-plan.md for the authoritative spec.