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 felipefontoura/pi-sdd-kit --skill sdd-plangit clone --depth 1 https://github.com/felipefontoura/pi-sdd-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/felipefontoura/pi-sdd-kit/sdd-plan)<a href="https://agentmods.dev/skills/felipefontoura/pi-sdd-kit/sdd-plan"><img src="https://agentmods.dev/badge/skills/felipefontoura/pi-sdd-kit/sdd-plan/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/felipefontoura/pi-sdd-kit/sdd-plan"><img src="https://agentmods.dev/badge/skills/felipefontoura/pi-sdd-kit/sdd-plan.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 | $0.00062 | $0.00871 |
| Opus 5 | $0.00031 | $0.00436 |
| Sonnet 5 | $0.00012 | $0.00174 |
| Haiku 4.5 | $0.00006 | $0.00087 |
Grade A, and why
sdd-plan 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 9d 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 — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SDD Plan
Convert explored ideas into a product or project plan.
Purpose
PLAN is the bridge between open-ended IDEA exploration and feature-level REQUIREMENTS. It is optional for very small work and recommended for medium projects with multiple features, modules, or phases.
Workflow
-
Load the SDD reference.
- Read
../_shared/references/sdd-practical.md. - Apply the Language Policy: respond and write artifacts in the user's initial chat language while keeping skill instructions and templates in EN-US.
- Read
../_shared/references/templates.mdwhen drafting the artifact. - Use package-level
templates/plan.mdas the user-facing template when available. - Load relevant
.ai/steering/*.mdfiles when present, especiallyproduct.md,tech-stack.md,conventions.md, andprinciples.md. - If
.ai/strategy/handoff/strategy-brief.mdexists, read it as optional upstream context; use it to reduce rediscovery, but do not require it or bypass plan approval.
- Read
-
Gather context.
- Read
.ai/sdd/ideas/*.mdrelevant to the requested project or feature set. - Read existing
.ai/sdd/PLAN.mdwhen updating. - Inspect
.ai/sdd/specs/if feature specs already exist. - Briefly inspect project README or product docs when available.
- When a strategy handoff is used, reflect it in plan source/context notes and call out any unresolved readiness gaps.
- Read
-
Clarify planning scope.
- Ask one question at a time.
- Cover vision, personas, MVP boundary, feature map, dependencies, constraints, and open decisions.
- Keep this at project/roadmap level; do not design implementation details.
-
Draft the plan.
- Use the Plan Template from
../_shared/references/templates.md. - Organize features by MoSCoW phases:
- Phase 1 — MVP / Must Have
- Phase 2 — Essentials / Should Have
- Phase 3 — Nice to Have / Could Have
- Include feature IDs such as
F01,F02,F03. - Include dependencies only when they affect sequencing.
- Include Open Decisions for unresolved strategy or scope questions.
- Use the Plan Template from
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.
- 9d ago First seen · 77 lines · 62 tokens per session scan A 36f4d45aa2c6
sdd-plan is a skill published in the GitHub repository felipefontoura/pi-sdd-kit (22 stars, last pushed 2mo ago), licensed MIT. It adds 62 tokens to every session and 871 once invoked, about $0.0003 per session on Opus 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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