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.checklistgit 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 | $0.00247 |
| Opus 5 | $0.00000 | $0.00123 |
| Sonnet 5 | $0.00000 | $0.00049 |
| Haiku 4.5 | $0.00000 | $0.00025 |
Grade A, and why
speckit.checklist 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/.
Feature Context Loading in Parallel
When loading feature context (step 4), dispatch parallel reads:
-
Sub-agent: Spec analysis — "Read spec.md at {FEATURE_DIR}/spec.md. Extract requirements, user stories, edge cases, and non-functional attributes relevant to the checklist domain: '{domain}'. Return a structured summary focused on requirement quality signals."
-
Sub-agent: Plan and tasks analysis — "Read plan.md and tasks.md at {FEATURE_DIR}/ (if they exist). Extract technical details, dependencies, and implementation tasks relevant to the checklist domain: '{domain}'. Return a structured summary."
Use the consolidated results to generate higher-quality, context-aware checklist items.
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 · 19 lines · 0 tokens per session scan A 03df1864eada
speckit.checklist is a command published in the GitHub repository github/spec-kit-copilot (11 stars, last pushed 6d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 247 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.