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 skills add Jed-Tech/spar-kit --skill spar-actgit clone --depth 1 https://github.com/Jed-Tech/spar-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/skills/jed-tech/spar-kit/spar-act)<a href="https://agentmods.dev/skills/jed-tech/spar-kit/spar-act"><img src="https://agentmods.dev/badge/skills/jed-tech/spar-kit/spar-act/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/skills/jed-tech/spar-kit/spar-act"><img src="https://agentmods.dev/badge/skills/jed-tech/spar-kit/spar-act.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 | $0.00050 | $0.00989 |
| Opus 5.5 | $0.00020 | $0.00396 |
| Sonnet 5.5 | $0.00010 | $0.00198 |
| Haiku 4.5 | $0.00005 | $0.00099 |
Grade A, and why
spar-act 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 1mo 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 — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Act
Execute the approved plan.md while preserving the intent and boundaries in
<change-name>_spec.md.
Act is implementation, not replanning. Refine execution details when needed, but do not change product intent, spec constraints, or accepted decisions without user approval.
Inputs
specs/active/<change-name>/<change-name>_spec.mdspecs/active/<change-name>/plan.md- Optional notes or artifacts in the same folder, such as
research.md - Relevant repository code and documentation
If the active spec or plan is missing, stop and use spar-plan first, or
spar-specify if no spec exists.
Execution Context
Before changing files, read the spec and plan together.
- Use spec
Scope,Out of Scope,Constraints,Success Criteria, andDecisionsas fixed implementation anchors. - Use plan
Approachfor the intended technical direction. - Use plan
Execution Constraintsas tactical guardrails. - Execute unchecked
Tasksin order unless reordering is required for correctness. - Use plan
Validation Strategyas the primary validation path. - Track plan
Risks / Follow-upswhile implementing and update them if new information materially changes them.
Execute Tasks
For each unchecked task:
- Understand the task, relevant spec anchors, and affected files.
- Implement the smallest coherent change that satisfies the task.
- Validate using the plan's
Validation Strategy, plus targeted project checks when useful. - Mark the task complete in
plan.mdonly after validation is sufficient.
Keep plan.md accurate as work progresses. It is fine to split, clarify, or
reorder tasks for correctness, but do not alter task intent in a way that changes
the spec.
Research and Blockers
Use repo context first. When errors, APIs, or implementation details are unclear, use available MCP tools, official docs, vendor docs, or web search to understand the issue.
If a task fails:
- Investigate the cause.
- Fix obvious issues and retry once.
- If still blocked, stop, summarize what you tried, explain the blocker, offer concrete next-step options with a recommendation, and ask how to proceed.
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.
- 1mo ago First seen · 131 lines · 50 tokens per session scan A e33df0d7064b
spar-act is a skill published in the GitHub repository Jed-Tech/spar-kit (17 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 50 tokens to every session and 989 once invoked, about $0.0002 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.
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