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 skills/danweinerdev/claude-sdd-planner/designnpx skills add danweinerdev/claude-sdd-planner --skill designgit clone --depth 1 https://github.com/danweinerdev/claude-sdd-plannerWrote 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/danweinerdev/claude-sdd-planner/design)<a href="https://agentmods.dev/skills/danweinerdev/claude-sdd-planner/design"><img src="https://agentmods.dev/badge/skills/danweinerdev/claude-sdd-planner/design.svg" alt="Measured on agentmods" 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 | $0.00038 | $0.01393 |
| Opus 5 | $0.00019 | $0.00696 |
| Sonnet 5 | $0.00008 | $0.00279 |
| Haiku 4.5 | $0.00004 | $0.00139 |
Grade A, and why
design 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.
How it starts
The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/design — Technical Architecture Document
Path Resolution
The plugin directory contains commands/, agents/, and shared/ as siblings. Find it by globbing for **/commands/research/SKILL.md in both the current directory and ~/.claude/plugins/cache/; if multiple versions match, sort them as semantic versions (like sort -V) and use the highest, then strip commands/research/SKILL.md from the match. Resolve the planning root (artifacts) and target repository per shared/path-resolution.md in the plugin directory.
When to Use
When you need to define the technical architecture for a component or system before implementation. Produces a reviewable design document with architecture decisions.
Process
-
Gather Context
- If the user hasn't already specified it, ask what component to design
- Invoke
sdd-planner:researcherwith the component and its constraints; it scans all artifact directories and the codebase per its own definition. - Review any related research documents
-
Draft Design
- Create
Designs/<ComponentName>/README.mdusingshared/templates/design.md - Document: overview, non-goals, architecture (components, data flow, interfaces), design decisions (with alternatives considered), error handling, testing strategy, migration plan
- Non-Goals bound the component. Name the responsibilities that belong to neighboring components, the generality this design declines to build, and any extension point deliberately left out. An unstated boundary gets built past
- Where a section realizes a spec requirement, cite its id inline (
FR-NN/NFR-NN—shared/frontmatter-schema.md§ Stable Identifiers) so coverage is greppable - Use Mermaid diagrams for architecture, data flow, and component relationships — prefer
graph TD,flowchart LR, orsequenceDiagramover ASCII art or prose-only descriptions - Testing strategy must include structural verification: Read
shared/language-verification.mdand include the language-appropriate structural checks (sanitizers, static analysis, type checking) in the Testing Strategy section. These define what "structurally correct" means for this component beyond passing tests. - Set status to
draft
- Create
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 Changed 403509da8563
- 5d ago First seen · 65 lines · 38 tokens per session scan A b4aab64add4f
design is a skill published in the GitHub repository danweinerdev/claude-sdd-planner (2 stars, last pushed today), licensed MIT. It adds 38 tokens to every session and 1,393 once invoked, about $0.0002 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 2026-08-31.
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